Abstract

    This paper describes the recent development of models in computer software JMatPro for the calculation of phase transformations and material properties critical to the prediction of distortion during heat treatment of steels. The success of these models is based on accurate description of all the major phase transformations taking place including the formation of ferrite, pearlite, bainite and martensite, as well as calculation of the properties of different phases formed during the heat treatment process. One advantage of the current models is that they can be applied to many types of steels including  medium to high alloy types. A wide range of properties such as density, thermal expansion coefficient, thermal conductivity, strength and hardness can be calculated, all as a function of time, temperature, and cooling rate, even for arbitrary cooling profile. The material data calculated from JMatPro have been exported directly to FE/FD-based packages for forging/deformation simulation.