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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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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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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DETERMINATION OF THERMAL CONDUCTIVITY OF SELECTED TYPES OF DUCTILE IRON (SPHEROIDAL GRAPHITE/CAST IRON) BY MEANS OF THERMAL DIFFUSIVITY MEASUREMENTS WITH LASER-FLASH METHOD

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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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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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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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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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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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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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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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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