Your search for Cu resulted in 158 matches...
The Inconel 740 type nickel alloy was melted in a vacuum, medium frequency induction furnace. During melting the inert gas (argon) atmosphere was used Metal was poured into a ceramic mould based on ethyl silicate. ...
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In this work the results of the application of different imaging techniques and image analysis systems for measurements of chosen either stereological parameters or geometrical features for some of morphology model...
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The first part of the publication presents the structure of global power industry market. Fundamental technologies of heat and electricity production in conventional coal combustion processes are considered,with sp...
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This paper presents the results of measurements of thermophysical properties of automotive brake discs made from gray cast iron. The samples were tested before and after operation in the braking system. Thermal con...
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The article presents the results of model tests and studies of the sand reclamation from waste moulding and core mixtures with an inorganic geopolymer binder, used in the trial production of pilot castings...
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This paper discusses some theoretical aspects of the design of ultralight materials. Potential application of syntactic foams in the fabrication of composites lighter than air is also analyzed. Carbon allotropic fo...
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On the example of a street inlet casting, the metal flow in the gating system on entering the mould cavity and inside the mould was depicted. The effect of the technique by which the metal is fed into the mould cav...
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Smart nanomaterials are those whose structures and components exhibit peculiar and welldeveloped physical, chemical, and biological properties caused by their nanosized dimensions. It is nanotechnology that deals w...
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To determine the kinetics of ausferrite decomposition in copper-nickel ADI, a kinetic model of Johnson-Mehl-Avrami (JMA), designed for the investigations under non-isothermal conditions, was used. Applying the Netz...
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Ordered cellular constructions are an important structural element used in armaments, aerospace and automotive industry. The use of Rapid Prototyping technique and control of solidification process allow making cas...
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The article presents the basic characteristics of the pollutants emitted in the process of foundry mould manufacture. A method to reduce harmful emissions through the application of advanced oxidation was described...
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In the course of the executed project, a series of investigations has been made to establish what effect a refined inoculant applied on the mould surface can have on changes in the surface structure of castings mad...
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The wetting behavior of Ni on a HfB2/Ta assembly was examined in vacuum using dense HfB2 (99.5% purity) produced, without sintering aids, by HP-HT at 7 GPa. The real-time imaging by a high res...
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The article presents the most important results of the research, development and implementation studies carried out under one of the Target Projects as a result of cooperation between the CERTECH Technical and Comm...
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The article discusses problems related with the evaluation of the effect of modification and multivariant heat treatment on mechanical properties of CuAl10Fe3Mn2 aluminium bronze. The evaluation was based on the re...
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The role of interstitial elements, i.e. nitrogen and boron, in the process of ductile iron solidification and heat treatment of castings was discussed. Austempering of ductile iron aims at obtaining an ausferritic ...
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The study describes the attempts to use a mechanochemical synthesis in the fabrication of composites based on Cu-Al intermetallic compounds reinforced with homogeneously distributed ceramic Al2O3...
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The wettability tests were carried out under a vacuum at 700°C in the drop/substrate couples, where drop is pure aluminium (99.999%), substrate - Ni (99.8%) and Niox (oxidized). Test were carried out...
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Comparative studies were made on modification of aluminium CuAl10Fe3Mn2 bronze by application of modifiers affecting changes in surface properties (Na, K, Ca, Mg) and providing additional substrates for crystallisa...
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As expected, the increasing demand for magnesium alloy castings has already become a fact. Considering this situation, a rich program of the studies on this particular subject has been initiated and put into operat...
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The study forms a part of the program of applied industrial research executed under Target Project No. ROW-II-403/2008 at MAGNUS-NORD Sp z o.o in Toruń. Pouring and solidification of two large steel castings weigh...
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This paper presents the results of measurements of thermal conductivity coefficient as a function of temperature for two species of spheroidal cast iron by using one of the most modern experimental sets LFA 427 (La...
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The effect of heat treatment on structure and mechanical properties of B1044 (CuAl10Fe4Ni4) alloy was investigated. In the examined alloy, the content of aluminium, iron and nickel results in the formation of struc...
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In view of the documented pathogenic effect on human health of dust containing crystalline silica, an attempt has been made to identify different variations of polymorphic silica in samples of dust emitted from fou...
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The study formed a part of industrial (applied) research executed under Target Project ROW-II-403/2008 at MAGNUS-NORD in Toruń. The aim of the study was to select the heat treatment parameters ensuring the require...
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High-alloyed Cr-Ni-Cu cast steel with additions of Mo and Nb and high nitrogen content was melted. The cast test ingots were subjected to a heat treatment. Metallographic examinations were made under an optical mic...
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The GX5CrNiCu16-4 martensitic cast steel with graded nitrogen content comprised in a range of 0,064-0,12% was melted; the chemical composition, including oxygen and nitrogen content, was determined. Test bars were ...
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Surface tension of liquid tin under high vacuum was measured by the technique of large drop, using a versatile set of apparatus for high temperature testing of the properties of liquid metals and alloys. Two proced...
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Development of instruments for micro- and macrostructure design in functionally graded materials is a challenge for the modern industry. In this path, mathematical modeling and numerical simulation are extremely he...
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The article is devoted to complex studies of diamond-like coatings applied by the PAPVD technique to improve the surface of medical tools and implants in terms of better anticorrosive behaviour and biocompatibility...
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The article is a compilation of the most important results obtained during execution of own research project regarding the possibility of using fly ash formed during combustion of hard coal as a base granular material ...
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This work reviews the current state of research regarding high temperature oxidation resistance of Fe-Cr-Al steels, that belong to a family of AFA (Alumina Forming Alloys). The behavior of these steels in hot gases...
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The article discusses the most important results of research, development and implementation works conducted under Target Projects in years 2006-2007 at the two Polish foundries, i.e. „Radom" Fittings Factory...
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This work reviews the current state of research regarding high temperature sulphidation resistance of Fe-Cr-Al steels that belong to a family of AFA (Alumina Forming Alloys). The behavior of these steels in hot gas...
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Properly conducted heat treatment of cast magnesium alloys is a very important tool in increasing the mechanical properties of castings. Nevertheless, during high temperature annealing of castings made from magnesi...
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The results of computer simulation carried out on MAGMAsoft and MAGMAiron programmes were presented for the technology of pouring and solidification of 35GSM steel castings and GJS400-15 and GJS600-3 ductile iron casti...
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The aim of this study was to determine the effect of temperature and Zn content on the solderability of Cu substrates with liquid Sn-xZn alloys (4.5; 90; 95 wt.% Zn). Solderability tests were carried out by the wetting balance test which allows th...
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This paper presents the results of tests on the effect of the surface coating and flux type on the solderability of PCB by lead-free tin-based SAC305 (SnAg3.0Cu0.5) alloy determining the size of the contact angle by a wetting balance method. The s...
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This paper presents the results of research work related with the effect of calcium on the microstructure and mechanical properties of AZ91 alloy. Samples of appropriately prepared alloy grades containing the addition of calcium in different conce...
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The aim of this study was to determine the effect of temperature and zinc content on the solderability of nickel substrates with liquid Sn-xZn alloys (4.5, 90, 95 wt% Zn). Solderability tests were carried out by the wetting balance method which al...
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The study adresses the problem of the damping capacity of metal matrix composites based on A359 alloy reinforced with 10%, 20% and 30% SiCp, subjected to multiple remelting. The aim of the research was to prove that the recycling proces...
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Melting of cast steel based on Fe-Al system was described. Problems of technological nature related with the melting process performance, starting with computer simulation and in the casting treatment ending, were discussed. The outcome of the stu...
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Numerical analysis was carried out to establish the operating stress distribution in softsealed gate valves cast from ductile iron EN-GJS-400-15 for the gas network of PE pipes. The analysis was carried out with ANSYS software, based on data and d...
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This article takes the form of a discussion. It presents problems concerning the determination of particle size and average diameter. The particles were analysed as the dispersed phase in various systems, including colloidal. It describes the basi...
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The paper presents the results of the effect of coating type on the amount of ionic contaminants present on printed circuit boards. The study was performed at the RT on the PCB with three types of coatings: HASL LF - lead-free, ENIG, OSP - organic...
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Pouring and solidification of EN-GJS-400-15 ductile cast iron castings of soft wedge gate valves for PE pipes used in gas pipelines was simulated. The analysis was performed in Flow-3D program. On the basis of the two-dimension documentation provi...
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The results of technological tests (chemical composition, solidification curves, microstructure) of ductile cast iron smelting in the Foundry Research Institute in an induction furnace. In the case of crystallization of spheroidal graphite no long...
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A simulation analysis was carried out on the casting and solidification of EN-GJS-400-15 spheroidal iron for production of soft-sealed wedge gates for PE pipe gas networks. The analysis was made in the Flow-3D software. Based on the engineering do...
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Decreasing the density of check valve dip balls by nearly 30% results in significant decrease in the wall thickness of the domes from which the balls are assembled. During the high pressure curing process a risk occurs of excessive deformation or ...
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Studies on the modification of aluminum brass CuZn30Al3 have shown that the additives used in combination 0.01−0.02% boron and 0.025−0.05% titanium resulted in a favorable change in the structure of the tested alloy. As a result, there...
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The aim of this study was to determine the impact of technological factors (surface treatment and contact time) on the kinetics of wetting of nickel substrates by a liquid aluminum alloy. Wetting kinetics studies were carried out in vacuum at 700&...
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Thin-walled dome casts (hemispheres) with a wall thickness of 4.2 and 10.3 mm made of ductile iron underwent simulation tests within the frame of forecasting the tendency to create residual stresses, casting defects, the shaping of structures and ...
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The article presents results of laboratory tests to develop a new generation of foundry hybrid bentonite. Hybrid bentonite is intended for use as binder for synthetic moulding sands and sandmixes. In the previous practice foundry bentonite was a p...
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Methods of direct measurement of air pollution increasingly used in environmental studies are not standardised and do not meet the requirements of the applicable European standards. The article presents studies on the determination of paramet...
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One of the factors which influence development tendencies within the scope of moulding sands used in foundry practice is environmental protection. Hence, while assessing technologies, the composition of utilised materials and emissions of harmful ...
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The presented paper is a description of the significance of CCT and TTT diagrams in the processes of heat treatment of ductile cast iron, and especially during the production of ADI. A review of literature in the subject was made. Own research inc...
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In this study a simple procedure for the in situ identification of the intermetallic phase precipitates in the interdendritic eutectic in both wrought and cast AlFeMnSi alloys has been established and then verified by ...
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The publication presents the results of optimisation of parameters of complex heat treatment of as-cast AlZnMgCu(Mn) alloys consisting in retrogression and reaging (RRA, Retrogression and Re-aging). For comparison...
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The presented article is the first in the series, which presents research related to the improvement of technology for producing brake blocks for the railway industry in the Spomel foundry in Lębork.The cooperation with the Foundry Research...
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On the basis of assumed curves of treatment the distribution of temperature fields was determined in selected model castings achieved during heat analysis, then assuming these values as boundary conditions an integrated strength analysis was carri...
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Wetting behavior of liquid Sn (99.99%) on graphenecoated Cu substrate was investigated by the sessile drop method using two testing procedures: 1) classical contact heating (CH) of a couple of materials; 2) capillary purification (CP) allowing non...
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The article discusses the research problematics of machines and equipment for casting technologies, with the consideration of the scope of research performed in Poland in the second half of the twentieth century at main domestic university facilit...
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Recycling of magnesium alloys is a complex issue not only because of their high reactivity and flammability even below melting temperature, but primarily because of a lack of equipment and experience in foundries. Nonetheless the environmental fac...
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In this work, issues regarding the energy sector in Poland are described in terms of subcritical technology which is commonly used and plays the most important role in electric power production. In such technology steam temperature reaches 500-530...
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The presented article is the second in the series, which presents research related to the improvement of technology for producing brake blocks for the railway industry in the Spomel foundry in Lębork. The cooperation with the Foundry Research Ins...
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This text presents the methodology and results of testing aluminium steel casting fluidity obtained in the bar test. These results have been compared with the fluidity of chrome-nickel-copper steel casting tested under the same conditions. The cou...
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The aim of this paper was to assess the possibilities and benefits of using low-volume (thinned) samplers for thermal analysis of cast iron. As part of the research, a series of melts of plain cast iron and low-alloy cast iron with different struc...
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The work herein presents the tests to produce austempered vermicular cast iron (AVCI - Austempered Vermicular Cast Iron) and the results of examination of the produced AVCI. The work includes the methodology of heats, the structure of the AVCI bef...
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Tests were conducted to develop a new generation of functional nano-coatings used in the foundry industry. The research focused on the introduction of modern and innovative coatings based on nanoparticles of cast elements and active chemical compo...
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This paper presents the method of investigating the sol-gel transition by constant speed removal of plates, made of suitable substrate, from an aqueous colloidal binder. The thickness of the deposited colloidal binder layer depends on the particle...
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The aim of this study was to determine the effect of the chemical composition of Ni-P coating on the wettability kinetics of SAC305 liquid solder in contact with the Ni-P coating. The study was conducted in vacuum, at 230°C, for 5 minutes, usi...
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The launch of new methods in the technical metrology area is a material factor determining the quality of the products. The paper presents the methodology of analysis of metrological tests conducted with the use of computed tomography and an optic...
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This article presents the evaluation method for nitrated and carbonitrided layer on the surface of the examined material (steel). The above mentioned method comprises the measurement of layer thickness, as well as decomposition of elements occurri...
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This paper presents the results of work on the determination of actual molten metal flow in a mould during centrifugal casting in the SuperCast induction vacuum furnace manufactured by Linn HighTherm. The centrifugal casting process uses the effec...
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Based on the results of dilatometric investigations, parameters of standard single-step and multi-step (or non-isothermal) ADI heat treatment were optimised. The optimisation was based on analysis of the heat treatment processes simulated under la...
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Among various sands with organic binders, moulding sands with furan resins belong to the group most widely applied in the manufacture of castings from ferrous alloys. This is due to a number of undisputable advantages offered by these sands, altho...
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The effect of tungsten on the solidification process, microstructure and mechanical properties of silumin 226 under the conditions close to equilibrium during pressure die casting was discussed. An increase in both mechanical and plastic propertie...
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The studies of the drop-size effect on the wetting kinetics of the nickel substrate by lead-free solder were performed by the sessile drop method in a vacuum at a temperature of 260°C.In this work, Sn-based alloy SAC305 (Ag - 3.0 wt. %, ...
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Casting manufacture depends on many factors. Technical specifications determine the required quality, which is essential for casting acceptance or rejection. Practice shows that making castings without defects is simply not possible. However, the ...
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The work focuses on tribological tests of G200CrNiMo4-3-3 cast steel in the state without modification as well as after modification with FeSi and FeB. The FeSi modification reduced the secondary cementite precipitation in the Widmanstätten p...
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The article describes several variations of the semi-solid metal processing (SSM) technique rendering castings with non-dendritic structure and significantly improved mechanical properties. The metal slurry was produced using the Rapid Slurry Form...
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The aim of the study was to determine the possibilities and conditions for the use of a multi-channel digital recorder to control cast iron quality by rapid thermal analysis. A computer program cooperating with a digital recorder was developed. It...
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Computer programs are now a common tool aiding the engineer’s work on structure design. The design of foundry moulds used in the pressure die casting process, based on the casting design and effectively utilising the ability to create 3D ima...
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In the research part of this study, several types of materials were proposed, including ADI (Austempered Ductile Iron) subjected to four different types of heat treatment, using cast manganese steel and cast nickel-copper steel. The use of these m...
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The paper focuses on the experimental investigation of wetting behavior and solderability of commercial lead-free solder on Printed Circuit Board (PCB) covered with an OSP finish (Organic Surface Protectant) characterized by physical (mechanically...
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Microscopic observations and quantitative analysis of the microstructure image were used to analyze the solidification course and morphology evolution in polyphase eutectics in the AlSi casting alloys with transition metals Fe and Mn. The utility ...
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Stress measurements were taken on three castings made on the laboratory scale by different technologies from ledeburite alloy steel; the obtained results were subjected to a detailed analysis. The first casting was made by a conventional technique...
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The article presents the results of investigations of the effect of selected casting parameters on the structure of casts made under high pressure by means of the casting machine produced by BÜHLER, type H630-B, out of the AlSi9Cu3 alloy from...
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In this research paper results concerning the inoculation method based on electromagnetic stirring of hypoeutectic aluminum with silicon alloys AlSi2 and AlSi7 grade are presented. The inoculation process used a stirrer supplied by current with a ...
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The article discusses the possibilities of applying direct multiple remelting as an easy as well as substantially and economically justified method of recycling composites with an A359 alloy matrix reinforced with Al2O3 parti...
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Issues related to the characteristics and production of silica sols are discussed. The impact of characteristic parameters of the structure of silica sols with different participation of SiO2, Na2O and the values of silica mo...
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In the research, a complex procedure was performed to determine the optimal parameters of thermal treatment of ductile iron with Ni, Cu, Mo and Mn additions which underwent austempering in order to obtain the ADI cast iron. Based on the constructe...
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The article discusses the thermal processes undergone by the sand mould in contact with the liquid casting alloy. Depending on the character of the atmosphere in the mould, this can be the process of combustion or pyrolysis (when there is no oxyge...
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The article presents the results of studies of hypoeutectic silumin with a molybdenum addition used for pressure casting. The studies included a thermal-derivative analysis of the crystallization process, a metallographic analysis of the microstru...
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Studies of composite materials of the Cu-C type with additives of different forms of carbon (carbon nanopowder, carbon nanotubes and reduced graphene oxide) were performed by the powder metallurgy method. Based on the structural tests conducted by...
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The study was conducted for two selected 7xxx series aluminum alloys according to PN-EN 573-3:2010 - Polish version. The analysis of ingots was carried out on 7003, 7003S and 7010, 7010K alloys with a similar ratio of zirconium content. Symbols S ...
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The new technological challenges and the high economical and commercial potential connected with the development of new generation soldering alloys used in the consumer electronics lead-free soldering technology is a subject which is gaining incre...
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The paper indicates the existence of many references to casting in the ancient literature. Their analysis allows one to enrich the knowledge of the beginnings and the history of the development of casting - one of the oldest technical areas of hum...
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The study presents the general data on modern cast iron with vermicular graphite, developed in Poland, which can be successfully used for casts of machine and device elements, especially those working under the conditions of thermal fatigue....
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The paper presents a critical analysis of the current state-of-the-art thermo-physical properties of metal composite materials, in which different types of carbon reinforcing phase have been used: graphite, diamond, carbon fibres, carbon nanotubes...
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The procedures of grain refinement and modification of a silicon eutectic in hypo- and transeutectic silumins belong to important factors shaping their microstructure as well as physico-mechanical and technological properties. Due to this fact, th...
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The development of a new element is a very complex procedure requiring a combination of many factors related to the design and manufacture phases. The most efficient way is to use computer simulation which allows for verification of the whole desi...
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Loose rapid hardening masses with synthetic resins, customarily called cold-box technologies, have dominated the process of casting core production. A distinguishing feature of these technologies is the manner of mass preparation without the use o...
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The increasing requirements concerning the emission of hazardous substances force the casting industry to search for new, more environment-friendly solutions. Such solutions may include technologies of developing moulding and core sands with the u...
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In the research, computer calculations were performed, consisting in solving the equation of population balance and the equation of the collision frequency of non-metallic inclusion particles, depending on the type of collision. In the simulations...
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The article presents the results of the pyrolysis of resin, the fast hardener as well as cured resin used in the ALPHASET technology. It is an alkaline phenolic resin of the resol type cured with an ester mixture. The pyrolysis was performed at 90...
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The die casting method is based on casting into permanent metal moulds, which makes it possible to obtain a large amount of casts with practically identical shapes. Compared to the technology of sand mould casting, this method has many advantages....
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Protective coatings are applied in order to obtain casts with an even surface, without faults. Protective coatings can contain a solvent based on water or alcohol; however, due to their harmfulness, it is recommended to limit the use of alcohol co...
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The sessile drop method was adopted to investigate the effect of multiple re-melting and casting of metal matrix composite on the structural stability of metal-ceramic slurry. Commercial aluminum matrix composite made of the A359Al alloy reinforce...
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The study analyzes the effect of Ni and Cu additions on the mechanical properties of ADI cast iron in casts with different wall thickness values. The applied experiment plan included the use of combinations of the Ni addition in the amount of 0.5%...
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The aim of the study was to determine the thermophysical characteristics of CuNiMoMn austempered ductile iron (ADI) obtained as a result of standard, one-step heat treatment performed at various temperatures.Temperature-dependent physical pr...
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The study attempts to complement the information on the effect of the density of moulding sands with inorganic binders on basic strength parameters, i.e. the tensile and bending strength of moulding sands with hydrated sodium silicate, after the p...
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The process of bonding by polymerization of methacrylamide was performed in situ on a quartz matrix at 25°C as well as in a microwave field (150°C; 800 W; 2.45 GHz). The composition of the reaction mixture, beside methylacrylamide as the m...
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Structural (FTIR) and thermo-analytic (DRIFT) studies were conducted on modified starch in the form of sodium salt of carboxymethyl starch (CMS-Na0.6) in the initial state, i.e. a colloidal solution, and in a cross-linked form prepared ...
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The article discusses the ways of modification of hydrated sodium silicate as a silicate binder of moulding sands which were applied in the studies. It determines the change in the residual strength of the moulding sand with used silicate binders ...
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The study involved the preparation of seven melts of spheroidal cast iron solution reinforced by means of an elevated content of silicon, including Cu, Mo and Ni additions. Thermal analyses of the melted cast iron were made and the ...
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The paper presents the results of the study of Al-Si alloys with a vanadium addition used in pressure casting. The hypoeutectic Al-Si alloy grade EN AC-46000 was applied as the initial alloy. The master alloy AlV10 was introduced into the initial ...
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The article presents an analysis of the thermal process of polystyrene model gasification. It discusses the investigation results of the effect of temperature on the gasification kinetics of the examined polystyrene model samples. It analyzes the ...
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The article presents the results of investigations into castings made of four aluminum alloys produced with the use of squeeze casting technology.The investigations used the following alloys: EN AW 7022 (AlZn5Mg3Cu) and its modification with...
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Silicon nitride powder with a small addition of magnesium oxide and yttria stabilized tetragonal zirconia fine particles was used as a starting material. Multilayer graphene nanoplatelets were used as filler for silicon nitride based composites. G...
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A new non-combustible, non-flammable, waterproof, long-lasting, heat-insulating composite material was made of glass foam granules (derived from glass waste) and a hydraulic inorganic binder in the form of a white Portland cement solution (CE...
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One of the most significant problems that engineers and researchers face is the development of technological solutions to extend the exploitation cycle of tools and industrial machinery. The research shows there are a few possibilities to solve th...
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During the project a technology of making ceramic moulds using aluminosilicate microspheres was developed. According to the developed technology, ceramic samples were used to determine thermal conductivity in the temperature range of 500°C to ...
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One of the aspects of sustainable development is the reduction of the concentration of CO2 in the atmosphere. This could be achieved for example by the reduction of fuel consumption. That is why the research for the new construction and...
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The present paper is relevant to the investigation of the interaction between the copper alloy metal matrix (CuZn38Pb2) and the reinforcement phase (Fe) during the production of "hybrid" complex relief MMCs. An innovative production method is used...
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The paper presents the results of thermophysical properties of selected vermicular graphite cast iron with nominal chemical composition of 3.70 C; 2.30 Si; 0.44 Mn; 0.054 P; 0.015 S; 0.017 Mg (wt. %). The comparative studies of the alloy were perf...
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The modern designing techniques and development procedures requires the use of advanced integrated methods. That kind of approach requires the involvement of series of steps which leads to the logical work stream known as Integrated Computational ...
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Two different spheroidization methods were compared in terms of the effect they may have on gas content (oxygen, nitrogen and hydrogen) in ductile iron castings and process efficiency.Two methods of cast iron treatment were investigated, i.e...
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The wetting behavior and reactivity between molten cast iron (originally vermicular graphite cast iron, containing in wt. %: 3.70 C, 2.30 Si, 0.44 Mn, 0.054 P, 0.017 Mg, 0.015 S) and commercial polycrystalline alumina (Al2O3 ...
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The article discusses the results of the studies of the effect of negative pressure in the mould and the casting system on the roughness of the casts’ surfaces. Roughness tests were performed on casts made of alloy EN AB 46000...
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The aim of the study was to improve the quality of 3D prints obtained by the FDM method (Fused Deposition Modeling) from ABS (acrylonitrile-butadiene-styrene), used for casting models. The agent used for smoothing the ABS was acetone.The pro...
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The paper focuses on the experimental investigation of high temperature wetting behaviour of liquid pure Mg during a contact heating on Ni substrate by the sessile drop method. High temperature wettability test was performed by the ...
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The paper presents the results of studies of hypoeutectic silumin with a chromium addition used for pressure casting. A silumin with the composition similar to that of EN AC-46000 was used as the initial one. In order to introduce chromi...
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The article discusses the impact of selected operations of the casting production technological process on the workplace environment, as well as on the external environment. The casting production is associated with technological operati...
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This article presents selected research methods related to protective coatings used for sand moulds and cores in the foundry industry. The research methodology has been divided into studies of the technological properties of sand moulds and cores ...
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The fundamental aim of the study was to obtain high-alloy granulate. The study tests many possibilities of obtaining granulate with the use of the appropriate methods. The preliminary tests with the use of small melting units as well as granulate ...
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Describes the process of casting technology design that produces an iron casting brake disc using CAD and CAE tools. For design calculations of the individual filling and ventilating systems uses the formulas commonly available in the literature f...
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The essence of the conversion process is the introduction of innovative in terms of materials and technology of cast parts, as components of manufactured machines and equipment in place of the traditional elements forged, welded, mechanically asse...
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The results of testing the tendency of light metals to forming defects from the group of discontinuities - hot cracks (W-301) [1], are presented in the hereby study. These are alloys of a small or moderate tendency for hot cracking. However this t...
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Together with development of casting technology for Al-Si-Mg alloys, new groups of casting materials are undergoes its implementation into foundry practice. Al-Mg-Si casting alloys possessed several advantages such as good strength ...
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Investigation results of erosion-mechanical grinding (wearing) of surfaces of foundry patterns (test samples) made of several kinds of materials are presented in the hereby paper. Investigations contained: resins, wood, painted ...
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The article raises the issue of the influence of increased temperature on olivine moulding and core sands with an inorganic binder from the group of unmodified kinds of hydrated sodium silicates. Produced at laboratory conditions,&n...
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The increasing requirements of casting users regarding the dimensional accuracy and surface roughness of castings force the manufacturers, i.e. foundries, to use protective coatings on moulds and cores. Coatings are applied in ...
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In this paper an attempt was made to explain the phenomena accompanying the formation and destruction of bonded elements of moulds and cores in which a mixture of unmodified hydrated sodium silicate with a molar module of 2.9 (...
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The present study was created as a result of the execution of the project entitled "Technological conversion of nickel alloys working under extreme conditions". This project, contract No.: TANGO2/340100/NCBR/2017 of 28.04.2017 ...
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The aim of the second part of the study was to make utility castings of refractory nickel alloys, traditionally processed plastically, intended for use in extremely difficult conditions. The related technological problems and obtained ef...
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The paper presents the results of investigations into the microstructures of composite materials produced by pressure infiltration of preforms of ceramic α-Al2O3 particles with aluminium alloy EN AW-2024. In particular,...
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This article presents a method of melting zirconium alloy in an induction vacuum furnace using a thermally insulated graphite crucible. The design of the Supercast Titan induction centrifugal furnace allows for the quick melting of metal alloys in...
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The article presents the history and current state of the technology of external pressure casting in the case of High Pressure Die Casting (HPDC) and Squeeze Casting (SC). The similarities and differences between the two technologies and the commo...
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The paper presents laboratory test results for an assessment of the binding characteristics of two grades of calcium bentonite compounds for casting moulds. The bentonite compounds were chemically modified with sodium carbonate at several differen...
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This paper presents the results of an examination of cast-on-strap joints of lead acid batteries with different discharge capacities. The galvanic joints of lugs of selected cells in lead acid batteries were analyzed. The study showed some defects...
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The designing of new light-weight alloys for continuous replacement of cast iron and steel parts is now the mainstream regarding energy saving and improvement of fuel consumption in the transportation sector. Parallel with the remarkable advances ...
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The paper presents an attempt to assess the mechanical properties of high-strength AlZnMgCu aluminium alloy samples cast in gypsum moulds. The first stage of the study involved the use of computer simulations to select the opti...
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The evolution of the integrated design of engineering processes and structures, including in particular advanced numerical modelling and computer simulations, has enabled a significant shortening of the implementation cycle of innovative material,...
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This study was undertaken to recognize sintering-, softening-, melting-, flow temperature, mineralogy, chemistry and prospects for utilization of the Polish fly ashes (FA, FAs). The study is metallurgy-foundry oriented, i.e. it regards the ashes a...
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Simeon AGATHOPOULOS (Greece)
Dana BOLIBRUCHOVÁ (Slovakia)
Andreas BÜHRIG-POLACZEK (Germany)
Józef DAŃKO
Natalya FROUMIN (Israel)
Hidetoshi FUJII (Japan)...
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