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EFFECT OF SQUEEZE PRESSURE ON MICROSTRUCTURAL CHARACTERISTICS OF THE AlSi7Mg ALLOY


The paper presents the results of studies on the effect of external pressure, applied on metal during squeeze casting process, on the structure of AlSi7Mg alloy. The obtained results were completed with examination...

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THE THERMAL ANALYSIS OF POLYSTYRENE FOUNDRY MODEL


The article presents the results of thermogravimetric (TG) investigations of a polystyrene foundry model. The study was conducted for three polystyrenes - Owipian (Syntos Oświęcim), copolymer PS and PSX (France)....

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STUDYING THE EMISSION OF PRODUCTS FORMED DURING EVAPORATION OF POLYSTYRENE PATTERNS IN THE LOST FOAM PROCESS IN TERMS OF THE WORK ENVIRONMENT


The article presents the ecological aspects of the lost foam technology. The results of environmental tests carried out on an experimental stand for pouring of moulds with liquid metal and knocking out of castings ...

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TECHNOLOGICAL ASPECTS OF THE SYNTHESIS OF METAL MATRIX COMPOSITES REINFORCED WITH CENOSPHERES


The paper presents a method of casting metal matrix composite materials based on light alloys reinforced with cenospheres. The cenospheres, which are product of fly ash processing by flotation, were formed into the...

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APPLICATION OF MOULDING SANDS WITH GEOPOLYMER BINDER IN THE MANUFACTURE OF CASTINGS FROM ALUMINIUM ALLOYS


The article presents the results of laboratory tests on the binding characteristics of moulding sands with inorganic geopolymer binders and for comparison with furan resin and alkaline resin, designed for casting o...

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EFFECT OF HEAT TREATMENT ON STRUCTURE OF THE INCONEL 740 TYPE ALLOY


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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MODEL STUDIES OF SAND RECLAMATION FROM THE WASTE MOULDING MIXTURES WITH NEW INORGANIC BINDER USED FOR CASTING OF ALUMINIUM ALLOYS


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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CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART 1: THE EFFECT OF TECHNOLOGICAL PARAMETERS OF THE PRESSURE DIE CASTING PPROCESS ON THE QUALITY OF CASTINGS MADE FROM THE AZ91 ALLOY


The article presents the results of research on the selection of optimum technological parameters of the hot-chamber die casting machine operation to make castings in AM50 magnesium alloy, coated next with the deco...

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ANALYSIS OF GATING AND FEEDING SYSTEMS FOR CASTING OF STREET INLETS WITH AND WITHOUT THE PROCESS OF FILTRATION


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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MANUFACTURING PROCESS AND MECHANICAL PROPERTIES OF ORDERED, CELLULAR CONSTRUCTIONS CAST FROM Al-Si ALLOY


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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EFFECT OF DIRECT IN-MOULD INOCULATION ON THE STRUCTURE OF IRON ALLOYS


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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SIMULATION STUDIES OF MOULD FILLING CONDITIONS WITH MOLTEN METAL IN EVAPORATIVE PATTERN TECHNOLOGY


Using available thermo-physical parameters, the paper describes the simulation studies of metal flow in mould filled with an evaporative pattern. The final properties of casting made in a lost-foam process are grea...

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DEVELOPMENT OF TECHNOLOGY TO MANUFACTURE „MODIFIED BENTONITE” USED IN PRODUCTION OF STEEL CASTINGS WITH SPECIAL REGARD TO CASTING SURFACE QUALITY


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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NITROGEN AND BORON EFFECT ON STRUCTURAL TRANSFORMATIONS TAKING PLACE IN DUCTILE IRON DURING AUSTEMPERING TREATMENT


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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SELECTED PROBLEMS OF A TECHNOLOGY OF THE AZ91 MAGNESIUM ALLOY MELT TREATMENT


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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ANALYSIS OF THE POURING AND SOLIDIFICATION PROCESS OF ALLOYED STEEL CASTINGS FOR LOW - TEMPERATURE PERFORMANCE


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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EFFECT OF HEAT TREATMENT ON THE MECHANICAL PROPERTIES OF GS-20Mn5 CAST STEEL ASSIGNED FOR OPERATION AT LOW TEMPERATURES


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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FROM FORGING TO CASTING – A CONVERSION IN BOTH MATERIAL AND DESIGN


The study presents an analysis of the possibilities to change the fabrication technology of a rocker for automotive applications, changing also the type of material used for this element. The application of high-st...

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METODA PRZETWARZANIA ŻELIWA W STANIE PÓŁSTAŁYM


A device for the fabrication of ingots from cast iron of globular non-dendritic structure of the primary phase was designed and made, using the principle of overflow on the Slope Cooling Plate, known as the SCP met...

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STRESS MODELS AND THEIR APPLICATION IN EXPLANATION OF CASTING DEFECT INFLUENCE ON THE CAST PART MECHANICAL BEHAVIOUR


The article examines possible use of analytical and numerical models of casting defects of a void type in determination of local increase of stresses in the vicinity of casting defect. The stress level can be one o...

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AN ASSESSMENT OF THE POSSIBILITIES TO SHAPE THE MECHANICAL PROPERTIES OF CAST AZ91 MAGNESIUM ALLOY THROUGH APPLICATION OF PROPER HEAT TREATMENT


The aim of this publication is to assess the effect of different types of the standard heat treatment on changes in mechanical properties at room temperature of magnesium alloy from AZ91 family referred to the same...

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APPLICATION OF GEOPOLYMER BINDER IN MANUFACTURING OF CASTING FROM FERROUS ALLOYS


The article presents the results of laboratory and industrial tests on the application of a new geopolymer Rudal A binder used in production of moulding and core sands for castings from carbon and alloyed cast stee...

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STRUCTURE FORMATION AND PROPERTIES OF Cr3C2 – NiCr CARBIDE COATINGS APPLIED BY PLASMA SPRAYING ONTO THE SURFACE OF DUCTILE IRON CASTINGS


The study presents the results of structure examinations and mechanical tests carried out on coatings based on Cr3Cr2-NiCr chromium carbide, applied onto the surface of ductile iron castings. The chromiu...

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HYDROGEN CONTENT IN GREY IRON CASTINGS MADE BY THE LOST FOAM PROCESS


One of the main parameters that determine the correct run of pattern evaporation process is the type and volume of gas evolved from a foamed polystyrene pattern during its evaporation. The process of pattern evapor...

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RECYCLING OF WASTE FLY ASH FORMED DURING COMBUSTION OF HARD COAL FOR USE IN MOULDING MIXTURES MANUFACTURE


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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EVALUATING THE FEASIBILITY OF MAKING ALUMINIUM ALLOY NANOMODIFIERS BY THE METHOD OF MECHANICAL ALLOYING


Nanomaterials extend the range of their application in human activities. The past few years have faced a considerable increase of interest in various aspects of the application of nanotechnology in liquid phase met...

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MICROADDITIONS OF BORON AND VANADIUM IN ADI. PART 2. OWN INVESTIGATIONS


In the second part of the study, describing the role of vanadium and boron microadditions in the process of structure formation in heavy-walled castings made from ADI, the results of own investigations were present...

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NEW COAL DUST SUBSTITUTES FOR BENTONITE MOULDING SANDS USED IN MANUFACTURE OF CASTINGS FROM MALLEABLE IRON AND ALUMINIUM ALLOYS


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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EVALUATING THE EFFECTIVENESS OF SPECIAL HEAT TREATMENT CARRIED OUT ON AZ91 MAGNESIUM ALLOY TO PREVENT THE GRAIN GROWTH


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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Technical and design study of the use of rapid prototyping technique to make an art casting of Medal commemorating the 65th Anniversary of the establishment of Foundry Research Institute in Cracow


Steps have been taken to make an art casting - a medal commemorating the 65th Anniversary of the establishment of the Foundry Research Institute in Cracow, using a rapid prototyping technique. The most important technological operations from a 2D ...

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CONVERSION COATINGS ON MAGNESIUM ALLOY DIE CASTINGS PART II: DEVELOPMENT OF A TECHNOLOGY FOR FABRICATION OF DECORATIVE AND PROTECTIVE COATINGS ON MAGNESIUM ALLOY DIE CASTINGS


The article presents the results of investigations of a technology for fabrication of decorative and protective chromate coatings on die castings made from AZ91 (MgAl9Zn1) magnesium alloy. As a result of the investigat...

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SIMULATION STUDIES (USING METHODS OF NUMERICAL CALCULATIONS) OF POURING AND SOLIDIFICATION OF SELECTED IRON ALLOY CASTINGS


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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HIGH-QUALITY FOUNDRY BENTONITE MADE FROM THE RAW DRIED MATERIAL AND SELECTED FRACTIONS FORMED IN THE PRODUCTION OF HYGIENE SORBENTS


The paper presents the results of laboratory and industrial tests undertaken in order to develop and implement in foundry production the high-quality bentonite made from the raw dried material and selected fractions formed in the production of hyg...

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STUDIES OF ODOUR NUISANCE IN INVESTMENT FOUNDRY


The emission of odours associated with the activities of various industrial plants and facilities is treated as a nuisance, and not as a factor harmful to humans and the environment. The smell, even when subjectively perceived as pleasant, with a ...

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ON THE DAMPING CAPACITY OF COMPOSITE MATERIALS


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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TECHNOLOGICAL ASPECTS OF ALLOYS BASED ON THE Fe-Al SYSTEM


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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ANALYSIS OF THE STATE OF STRESS IN CAST BODIES, COVERS AND WEDGES OF THE WEDGE GATE VALVES USED IN GAS NETWORKS


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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CHANGES IN THE MICROSTRUCTURE OF PA9 ALLOY UNDER THE EFFECT OF SQUEEZE PRESSURE


This paper presents the results of research on an impact of external pressure applied in the squeeze casting process on the structure of PA9 alloy. Samples for the research were obtained by casting the tested PA9 alloy into a die under a varying p...

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USE OF FLOW-3D PROGRAM FOR SIMULATION OF POURING AND SOLIDIFICATION PROCESS OF DUCTILE CAST IRON CASTINGS. PART 1


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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NICKEL LAYER DEPOSITION ON INVESTMENT CASTING POLYMER PATTERNS


The article presents a method of modification of ceramic mould surface on the boundary between lost-wax model - ceramics by using a layer of nickel on a disposable model made of a specified type of polymer e.g. polymethyl methacrylate (PMMA) and t...

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THE STUDY OF FACTORS ALTERING PHYSICAL AND CHEMICAL STATE OF LIQUID CAST IRON AND A SELECTION OF THE MATERIAL PROPERTIES


The study was conducted to determine the effect of spheroidization and modification method, of the CE value, the content of magnesium and lanthanum on susceptibility to form shrinkage defects, structure and resistance properties of ductile cast ir...

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APPLICATION OF THE FLOW 3-D SOFTWARE FOR SIMULATION OF THE SPHEROIDAL IRON CASTING AND SOLIDIFICATION. PART 2


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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CAST Al-Si MATRIX COMPOSITES REINFORCED WITH INTERMETALLIC PHASES


In the present paper research results of microstructure and selected mechanical properties of composite on EN AC-AlSi11 alloy matrix with reinforcement in the form of particle of Cr-Fe-C alloy (composite ex situ) and carbonitrides Ti, Zr, V (compo...

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STRUCTURE OF GUIDE GRATE IN HEAT TREATMENT TECHNOLOGICAL EQUIPMENT


The paper presents a procedure that allows a quantitative comparative assessment of the flexibility of different design solutions of guide grate cast. Guide grate is an essential component part in all types of technological equipment structures us...

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SIMULATION TESTS TO FORECAST SELECTED PROPERTIES OF THIN-WALLED CASTS OF DUCTILE IRON DOMES


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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Reclamability of moulding sands with new inorganic binders for non-ferrous castings


The article presents results of an investigation which constitutes a section of research under the project POIG.01.01.02-00-015/09 "Advanced materials and technologies", one of the aims which is the introduction of new ecological inorganic binders...

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The application of Integrated Computational Materials Engineering (ICME) in foundry practice


This article presents the latest tendencies within the scope of the application of computer simulation in the process of developing new solutions, including solutions in foundry practice. The functioning of Integrated Computational Materials Engin...

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The research of innovative mixtures for plaster moulds used for artistic castings


Research was carried out on the technological properties of plaster mixtures developed at the Foundry Research Institute. Developed were mixtures of ceramic compounds in which the basic material was synthetic plaster. ...

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The research of innovative mixtures for plaster moulds used for artistic castings


Research was carried out on the technological properties of plaster mixtures developed at the Foundry Research Institute. Developed were mixtures of ceramic compounds in which the basic material was synthetic plaster. ...

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The ecological and material-saving technology for producing brake blocks with stable parameters of quality. Part 1. Technology modernization using computer simulation


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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Research on ablation casting technology for aluminium alloys


The article presents preliminary results of research on ablation casting technology. The guidelines for the design of equipment to carry out the process are described. Based on the above mentioned instructions a test stand was developed and built....

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Computer simulation of stresses occurring as a result of applied heat treatment


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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Tests to produce a white cast iron die casting


The manufacturing of cast iron castings by pressure die casting method, evaluation of castings microstructure and process analysis were the purpose of the experiments. White cast iron castings were fabricated and then these castings were annealed....

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Research problematics of casting technology machines and equipment


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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Shaping the microstructure and properties of silumin castings in molds cooled with water mist


The paper presents the possibility of obtaining highquality silumin castings with enhanced mechanical properties. It ensures the effective use of the multipoint water mist cooling system which is managed by a dedicated computer program....

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The effect of the addition of circulating scrap on the tensile properties of die cast magnesium alloy


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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The ecological and material-saving technology for producing brake blocks with stable parameters of quality Part 2. Verification of modernized technology under real conditions


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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Assessment of aluminium steel casting fluidity


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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Casting of wrought alloys under external pressure


The paper presents results of wrought alloys casting trials under external pressure. Three alloys were used in the experiment - namely: 2024, 6061 and 7075. The examinations were conducted on squeeze cast parts that solidified under high pressure ...

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The use of low-volume cup samplers for test solidification of cast iron


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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Development of innovative method to procedure chemically active nano-coatings for moulds and cores


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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Comparison of layer thickness on materials produced by sol-gel transition on substrates removed from aqueous solutions of colloidal binders


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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Comparison of the results of metrological tests obtained from X-ray computed tomography and optical 3D scanner


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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Application of topological optimisation in forming of cast cellular structures


Cellular structures are critical components which perform as energy absorbers in the defense, aerospace and automotive industries. Simultaneous application of topological optimisation algorithms for strength forming, solidification simulation soft...

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Influence of the structure index WB of the soluble sodium silicate on the residual strength of molding sand


Results of Rctk residual strength tests are presented for samples of moulding sands prepared with a stable content of soluble sodium silicate binding agents of different WB structure indicator values, hardened in the ester pr...

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Application of X-ray computed tomography to compare gravity casting to counter-gravity low-pressure air-melted process


The purpose of this paper is to evaluate the internal structure of alloys similar to AlSi9Mg (EN AC-43300), made with the counter-gravity low-pressure air-melted process (CLA) and with the gravity casting process. The X-ray computed tomography (CT...

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Experimental verification of the simulation of centrifugal casting in ceramic moulds


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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Analysis of the sulphur content in moulding sands with furan resins


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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Choice of mould-making technology for the modified ablation casting process


The article presents the results of tests and studies carried out within the framework of statutory activities on various additives to moulding sands based on water-soluble inorganic binders for ablative knocking out of castings. As a result of te...

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Effect of tungsten on the solidification process, microstructure and properties of silumin 226


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 use of X-ray computed tomography as a tool in assisting cast material testing


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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Production of castings with non-dendritic structure using the Rapid Slurry Forming method


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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Comparative analysis of solidification curves obtained by thermal analysis system and multi-channel digital recorder


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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Simulation of the volume and distribution of air entrapped by liquid metal in a test mould for the pressure die casting process


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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Choice of material for the working parts of machines operating in municipal wastewater treatment plants


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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Building foundations for the diffusion mechanism of ceramic mould drying


An attempt was made to develop a mathematical model and apply this model in numerical analysis to the drying process of multi-layer ceramic moulds used in investment casting. The numerical analysis carried out in a FLOW-3D program was meant to ser...

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The AlFeMnSi intermetallics competition in the interdendritic eutectics in AlSi cast alloys influenced by cooling rate and transition metals content


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 analysis in the surface layer of steel castings


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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Evaluation of selected parameters of pressure casting on the structure of silumin AlSi9Cu3


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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Inoculation of Al-Si alloys using the electromagnetic stirring method


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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Structural determinants of the mechanical properties of A359 + Al2O3 composites after multiple remelting


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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CastExpert system for casting defect diagnostics


The investigations of the CastExpert system have been conducted at the Foundry Research Institute for many years now, including the following: perfecting the internal structure of the system and diagnostic procedures, enriching the knowledge base ...

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Processes of pyrolysis and their effect on cast quality and working conditions


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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Effect of molybdenum on the crystallization, microstructure and properties of silumin 226


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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Microstructure of selected 7xxx series aluminum alloys obtained by semi-continuous casting


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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Casting in ancient literature


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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Cast iron with vermicular graphite as a prospective material


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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Effect of Sn content on corrosion resistance of iron


The study characterizes the acid corrosion resistance of six iron alloys containing additions from 0.007 to 1.03 wt. % of tin. The alloys were obtained by way of remelting in a Tamman furnace made of pure iron (99.98% Fe) with additions of spectra...

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Analysis of non-metallic inclusions in AZ91 alloy casts with process foundry return in high-pressure die casting


The article presents research results of the process foundry return influence in the AZ91 alloy charge on the change in the structure of castings made by the high-pressure casting method, with special consideration of the formation of non-metallic...

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Development and optimization of casting technology on part of the suspension of a heavy vehicle used in difficult environmental wetland conditions


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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Chromatographic analysis of selected products of thermal decomposition of core sands made in cold-box technology


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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Effect of a biodegradable addition as a binary binder component for cast moulding and core sands on the properties of the binder and the sands


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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Analysis of the drying process of moistened surface layers of sand moulds and cores on the example of moulding sand with water glass


An analysis of the drying process of surface layers of sand moulds and cores (made of loose self-hardening moulding sand with hydrated sodium silicate hardened with a liquid ester hardener) which was previously subjected to the process of moisture...

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Studies of protective coatings used for metal moulds


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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Stability of metal-ceramic slurry after multiple re-melting of A359 aluminum alloy based composite reinforced with Al2O3 particles


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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Optimization of Ni and Cu additions in ADI cast iron in respect of cast cooling rate


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 role of the densification of moulding sands with inorganic binders in the modeling of their strength obtained after microwave hardening


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 methacrylamide polymerization conducted in situ on a mineral matrix


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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Effect of vanadium on the crystallization process, microstructure and properties of Al-Si alloy EN AC-46000


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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Application of squeeze casting technology to obtain aluminum alloy castings


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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Development of a technology for the production of ceramic moulds with reduced thermal conductivity to control the solidification of thin-walled castings


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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The evaluation of microporosity and mechanical properties in high strength aluminum alloys with the use of numerical analysis and computed tomography


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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Development and manufacturing of casting technology for crawler vehicle suspension used in wetlands


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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A comparison of the oxygen, nitrogen and hydrogen content in ductile iron castings and their effect on microstructure and mechanical properties


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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Studies of the effect of negative pressure in the mould on the cast surface roughness


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 effect of acetone on ABS used in the 3D printing of casting models


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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Effect of chromium on the crystallization process, microstructure and properties of hypoeutectic Al-Si alloy


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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Selected casting processes in the aspect of their effect on the environment protection


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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Application of 3D printing technology to make the core of casting mould and dimensional control using a 3D scanner


The aim of the work was to develop and model individual elements of casting technology for the casting of a ventilated brake disc using CAD program: SolidWorks, followed by printing a core using a 3D LS ONE printer from Sand Made Lt...

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Selected methods of testing protective coatings applied on casting moulds and cores


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 application of CAD and CAE software to design and selection of foundry technology for casting of grey cast iron – brake disc


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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Strength analysis of horseshoes made using casting techniques


The article presents a fragment of results of R&D works carried out at the Foundry Research Institute concerning the development of modern casting materials from ferrous and non-ferrous alloys to make horseshoes with increased durability. Prob...

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The effect of nickel content on structure and hardness of ductile iron in thin-walled castings


In the technology of ductile iron manufacture, graphite precipitates take the form of spheroids, and this shape has the least harmful effect on cast iron mechanical properties. The strength of ductile iron depends mainly on its matrix, and hence o...

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Composite zones obtained in situ in steel casts of crushing mill beaters


The aim of the presented study was to obtain the element of a crushing mill beater reinforced with a composite zone, working under the conditions of high abrasive wear as well as high pressures. By means of the SHSB method, a local composite zone ...

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Technical and economic aspects of technological conversion of Ni-based superalloys working in extreme conditions


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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