Influence of forging temperature on the performance of new automotive differential gears

In this paper, 20CrMnTiVSr specimens for new automotive differential gears were fabricated by forging temperature and final forging temperature, and the wear resistance and impact properties were tested and analyzed. The results show that with the increase of initial forging temperature and final forging temperature, the wear volume of 20CrMnTiVSr specimens for new automobile differential gears first decreased and then increased, and the impact absorption power first increased and then decreased, and the wear resistance and the impact performance wer first increased and then decreased. Compared with the initial forging at 1 160 ℃, the wear volume of the sample at the initial forging temperature of 1 220 ℃ was reduced by 44.44%, and the impact absorption work was increased by 20%. Compared with the final forging at 760 ℃, the wear volume of the samples at the final forging temperature of 820 ℃ was reduced by 47.37% and the impact absorption work was increased by 24.53%. The optimal forging process parameters of the 20CrMnTiVSr sample for the new automotive differential gear are initial forging temperature of 1 220 ℃ and final forging temperature of 820 ℃.