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Your search for modification resulted in 27 matches...

EFFECT OF MODIFICATION AND HEAT TREATMENT (SOLUTION HEAT TREATMENT, AND SOLUTION HEAT TREATMENT + AGEING) ON STRUCTURE AND MECHANICAL PROPERTIES OF CuAl10Fe3Mn2 BRONZE


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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COMPARATIVE STUDIES OF THE EFFECT OF VARIOUS ADDITIVES ON STRUCTURE AND MECHANICAL PROPERTIES OF CuAl10Fe3Mn2 ALLOY


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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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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WEAR RESISTANCE AND BIOCOMPATIBILITY OF DENTAL TOOLS UPGRADED BY DIFFERENT COATINGS


Dental tools are sometimes damaged as a results of exploitation or during sterilization and desinfection. The aim of durability improving of dental borers and tweezers and increasing of the biocompatibility was mod...

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INVESTIGATIONS OF A CORRELATION BETWEEN THE TYPE AND AMOUNT OF MODIFIER, HIGH-TEMPERATURE TRANSFORMATIONS AND RESIDUAL STRENGTH OF SANDS WITH MODIFIED SODIUM SILICATES


The article presents the results of high-temperature investigations of the modified samples of hydrated sodium silicate and of the sand mixtures with an addition of this compound. To improve the knocking out proper...

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STUDIES ON THE PROPERTIES IMPROVEMENT AND APPLICATION OF NEW INORGANIC BINDERS USED IN THE MANUFACTURE OF ENVIRONMENT-FRIENDLY MOULDING AND CORE SANDS


The article gives the results obtained in a fragment of the studies, carried out under a statutory activity, on optimising of the foundry sand technology with new modified inorganic binders, chemically bonded and C...

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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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INFLUENCE OF CHEMICAL MODIFICATION OF THE SOLUBLE SODIUM SILICATE ON THE ZETA POTENTIAL OF THE COLLOIDAL PARTICLES IN A “SOLUBLE SODIUM SILICATE – ESTER HARDENER” GELLING SYSTEM


The article presents how to perform a chemical modification of the soluble sodium silicate with morphoactive, organic compounds. An attempt was made to determine the effect of chemical modifiers of the soluble sodium silicate on its physicochemica...

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EFFECT OF CALCIUM CARBIDE MODIFICATION ON THE MECHANICAL PROPERTIES OF BA 1044 BRONZE


The effect of solution heat treatment with jet cooling and modification with C + Ca and CaC2 on the behaviour of BA1044 alloy in as-cast state, and after solution heat treatment and toughening was examined. The microjet modification and...

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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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INFLUENCE OF MODIFICATION ON THE STRUCTURE AND IMPACT STRENGTH OF ALUMINIUM BRASS CuZn30Al3


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 optimisation of heat treatment parameters for selected cast AlZnMgCu(Mn) alloys


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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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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Assessment of quartz wettability by the ecological foundry binder modified with nanoparticles of metal oxides


The results of studies of quartz wettability by an ecological foundry binder are presented. Water glass modified with nanoparticles of metal oxides, such as: MgO, Al2O3 and ZnO in organic solvents (methanol or propanol) was u...

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The role of modification processes in ledeburitic class cast steel tribological properties


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 effect of wetting agent on the parameters of dry moulding silica sands bonded with sodium water glass


An attempt has been made to determine the effect of the addition of an agent wetting the surface of silica sand grains, introduced in order to increase the hardening efficiency of selected physical methods applied to the ecological foundry sands b...

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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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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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Optimization of grain refinement and modification of the eutectic in hypo- and transeutectic Al-Si alloys


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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Spectral study (FTIR, UV-Vis) of montmorillonite modified by ultrasound and potassium cations


This paper presented the spectral study (FTIR, UV-Vis) for samples of non-activated bentonite (calcium) which has in its composition a main mineral resource, montmorillonite (MMT). MMT, as a component which contains calcium ions (Ca-MMT, was modif...

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Effect of the way of modification of hydrated sodium silicate on the effectiveness of the changes in the residual strength of a moulding sand


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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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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Assessment criteria for binding characteristics of foundry bentonites


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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Simulation analysis of liquid metal flow through an innovative reaction chamber (and its shape optimization) used in ductile iron production technology


Ductile iron castings are widely used in many industrial branches because of their mechanical properties. The production process of such a grade of cast iron requires the maintenance of the technological regime and the purity of initial charge mat...

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Maps of crystal lattice orientation in polyphase microregions as a parameter of the microstructure image of a multicomponent metal alloy


This study includes the results of tests related to selecting the data collection parameters for EBSD analysis, correction and modification of the EBS diffraction patterns, and use of selected functionalities of the commercial OIM s...

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Measurement of gas contents in a metal bath as a method for the optimisation of deoxidation and modification procedures for cast steel


The paper presents the results of works concerning the optimisation of the process of steel melting for castings of industrial fittings in an induction furnace with an acid lining. Materials containing high activity elements such as Al, Ca, Ti, Zr...

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