Material Modeling and Numerical Analysis of the Heat Treatment in High Carbon Steels-Application to Ring Rolling

Abstract

Numerical modeling of the heat treatment is developed over the past 30 years and connected to the industrial applications. This requires a good insight in the thermal, mechanical and metallurgical behavior of steels and the coupling effects among these physical phenomena. To describe these effects, a suitable material model is developed. Additionally, the thermo-mechanical behavior of multi-phase steel during the phase transformation is investigated. Furthermore, the material model is applied to describe the plastic behavior of the steel during the cooling process in process-integrated powder coating which is a new kind of ring-rolling process. It takes advantages of the high temperatures and high forces of the ring rolling process. This is not only to increase the ring's diameter, but also to integrate powder metallurgical multi-functional coatings within the same process. In order to increase the strength and wear properties of investigated steels, an appropriate heat treatment should be done. Therefore, the heat treatment after the rolling process is discussed which goes along with phase transformations. The paper is concluded by a detailed description of the process simulation and a comparison of its results with experimental data.