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Your search for heat treatment resulted in 28 matches...

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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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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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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EFFECT OF HEAT TREATMENT ON STRUCTURE AND PROPERTIES OF ALUMINIUM-NICKEL BRONZE


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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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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MECHANICAL PROPERTIES OF HIGH-ALLOYED, DISPERSION-HARDENED, MARTENSITIC CAST STEEL AFTER MULTI-STAGE HEAT TREATMENT


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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AN ASSESSMENT OF NITROGEN CONTENT EFFECT ON THE MECHANICAL PROPERTIES OF MARTENSITIC CAST STEEL


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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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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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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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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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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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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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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THE COMPARISON OF THE MICROSTRUCTURE AND THE MECHANICAL CHARACTERISTIC OF AUSTEMPERED DUCTILE CAST IRON AND STEEL SUBJECT TO DYNAMIC DEFORMATION USING THE TAYLOR TEST


The article attempts to compare the resistance of austempered ductile cast iron and S215 steel to dynamic loads. The samples were subject to research using the Taylor test methodology at different speeds of deformation, in order to determine the c...

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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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The exploitation of TTT diagrams in the CAPCAST system


The presented paper is a description of one of the modules of the CAPCAST system which allows determination of recommended materials made of ductile cast iron which show specific properties or may achieve the desired properties after an appropriat...

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The use of TTT diagrams of low-alloy ductile cast iron to develop a technology for the production of ADI


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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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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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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Optimization of two-step ADI heat treatment of Cu-Ni ductile iron by means of thermal analysis methods


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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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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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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The microstructure and properties of cast alloyed G200CrNiMo4-3-3 steel


The subject of the study is the analysis of the microstructure and mechanical properties of cast G200CrNiMo4-3-3 steel. The investigated alloyed cast steel, containing approximately 2% C, is nearly an ideal material for the hot mill work rolls, an...

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Determination of the optimal austempering parameters of Ni-Cu (Mo,Mn) ductile iron based on CCT and TTT diagrams


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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Thermophysical properties of CuNiMoMn Austempered Ductile Iron


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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Influence of TiN nanoparticles on the microstructure and hardness of arc overlaid welding layers


Electrodes for manual arc overlay welding with coating containing nanomodifier TiN in concentrations between 0.2% and 1.5% were developed and manufactured. Samples of welded overlay layers with electrodes were both examined by electron microscopy ...

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