KINETICS OF THE DECOMPOSITION OF AUSFERRITIC STRUCTURE IN COPPER-NICKEL ADI

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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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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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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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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Alternative technology of obtaining ausferrite in the matrix of spheroidal cast iron

This study presents selected issues regarding the process of obtaining ausferrite from spheroidal cast iron without the application of thermal treatment to the casts. An ausferritic matrix, as well as strong mechanical properties, also ensures hig...

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Influence of two-step austempering process on mechanical properties and wear resistance of carbidic austempered ductile iron (CADI)

CADI (Carbidic ADI) - ausferritic ductile iron containing carbides - is a relatively new engineering material which exhibits excellent wear resistance and adequate impact strength. In this work the influence of two-step austempering process on sel...

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