Computer Simulation of Induction Hardening Incorporating Thermal Deformation of Large Ring Metal Parts

摘要

When large steel parts of construction equipment and machine tools are hardened by induction hardening, it is necessary to employ a low frequency heating process to ensure the depth of the hardened layer. In this case, the relative position of the workpiece and the induction coil changes greatly due to the internal temperature increase of the workpiece during the heating process. In addition the distributed heat generation of the workpiece changes continually from moment to moment. But this phenomenon has not been considered in our current induction hardening simulation system. Improving the accuracy of the simulation system is currently a great challenge for the industry. In this study, a computer simulation was applied to the induction heating test of large ring specimens, and this showed the need for electromagnetic field analysis when considering the thermal deformation of large steel parts. This will ensure high accuracy of the induction hardening simulation for large steel parts.