Prediction of austenite decomposition kinetics in powder steel depending on porosity

[摘要] For the rationale behind the powder steel heat treatment modes, quantitative data on austenite decomposition kinetics are required. Gaining these data experimentally for different values of porosity is a quite difficult and laborious process. In this article an approach, based on appliance of simulation to evaluation of porosity effect on austenite decomposition kinetics and constructing of isothermal and kinetic diagrams for powder steel by calculation, is proposed. Adaptability of the shown models to predict the transformation kinetics was verified on carbon steel (0.8% C) with different porosity and steel PK45N2 (0.45% C, 2% Ni) with different porosity.

[发布机构] Tyumen State University, Volodarskogo Av. 6, Tyumen; 625003, Russia^1;Finance Group S.A., Presnenskaya Emb. 12, Moscow; 123100, Russia^2

[效力级别] 电工学

[关键词] Austenite decomposition;Heat treatment modes;Kinetic diagrams;Porosity effect;Powder steel;Quantitative data;Transformation kinetics