Numerical simulation of temperature field and stress field of medium carbon steel before and after hardfacing

The residual stress field of hot roller steel 60CrMnMo after hardfacing was measured by using X-ray stress analysis.From temperature simulation results,the temperature distribution of specimen and temperature curve at different location of the specimen at different time can be obtained,which can represent the whole process of temperature variation during hardfacing.When the hardfacing time is 16 sec,the temperature at different location of the specimen is very different.When hardfacing process is finished,the heat spread quickly to other directions.Up to 180 sec,the temperature is similar to each other between center and surface of the specimen,the temperature distribution of the whole specimen is uniform.The highest temperature appears near the lower surface.Comparison between the simulated results of the residual stress fields with measured ones shows that there is a good agreement with each other,which proves this model is effective.According to this model,the stresses at different time during cooling after hardfacing was simulated too by using the temperature field mentioned above.The results show that the tensile stress at the dangerous location appears at the interface,change of stress between the mutation is great.