MATERIAL PROPERTY DATABASE FOR HEAT-TREATMENT SIMULATION OF TOOL MATERIALS

A materials data base has been set up with mechanical, thermophysical and transformation properties of tool and creep resistant steels. In p articular powder metallurgical materials have been covered. The intend ed use of the data is for numerical simulation of heat treatment with focus on computation of residual stresses and distortion in compound m aterials (macro composites). The main body of the data was generated i n new experiments. In this paper data for the powder metallurgical hig h speed steel ASP 2060 will be presented. The material properties dete rmined include thermophysical data such as thermal conductivity and sp ecific heat, mechanical data such as yield strength and work hardening rate, and thermal expansion data. Most data were determined at differ ent temperatures and after heat treatments to different microstructure s. Additional data added to the database include literature data for e lastic properties and transformation induced plasticity. Quenching of a compound ring consisting of an inner high speed steel and an outer t ool steel was simulated numerically using two codes, DistSIMR and Tras t7. With the help of a database interface input data adjusted to the f ormats of the two codes were generated. The results of the simulations showed good agreement between the two models both for the computed re sidual stresses and distortions, which confirms the reliability of the results.