An Investigation Of Heat-treatment Process And Relative Theory For High Carbon And Wearable Steel Ball

In this paper, properties and production process of PD3 high carbon wearable steel ball have been studied by using a combination of experimental, theoretical and numerical analysis. A production process meeting the requirements of mass production has been designed; by this production technique high quality steel ball has been successfully produced. In order to obtain the best parameters of production process of steel ball and further optimize the production technique, the heat treatment of high carbon steel under different conditions has been carried out in both laboratory and production line. High-temperature thermomechanical treatment of high carbon steel under different conditions has been carried out on Gleeble-1500D. The true strain-stress curve of high carbon steel has been obtained. The dynamic recrystallization of Austenite has been investigated, and the effect of deformation temperature and deformation rate on the dynamic recrystallation has been also studied. The results show that the steel ball gets higher hardness and toughness when forged at 1050℃ at a high deformation rate. In order to further improve the quality of the steel ball, special software has been developed, to simulate the temperature field of the steel ball when it is being quenched; the results calculated by the software agreed well with the theoretical analysis. Finally some numerical examples about the software are presented.