The measure and calculation on thermal conductivity at high temperature of casting 42CrMo steel based on hot ring rolling process

Aiming at the casting 42CrMo steel used in hot ring rolling process,the thermal conductivity curve which changes with temperature at high temperature(500~1200℃) has been simulated by use of JMatPro software. The thermal conductivity data at 8 points(every 100℃ for one point) at the same temperature range has been measured by use of laser thermal conductivity meter(LFA427). The fitting curve has been drawn through Origin software. By comparing the two curves above,the thermal conductivity curve of casting 42CrMo steel which is closest to the real has been obtained. It provides reliable technological parameter and material model for the following numerical simulation of ring rolling process.