锻压温度对新型汽车差速器齿轮性能的影响

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

  • 摘要: 采用不同的始锻温度和终锻温度对新型汽车差速器齿轮用20CrMnTiVSr试样进行了锻压成型试验,并进行了磨损性能和冲击性能的测试与分析。结果表明:随始锻温度和终锻温度的升高,新型汽车差速器齿轮用20CrMnTiVSr试样的磨损体积先减小后增大,冲击吸收功先增大后减小,耐磨损性能和冲击性能先提升后下降。与1 160 ℃始锻相比,1 220 ℃始锻温度下试样的磨损体积减小了44.44%,冲击吸收功增大了20%;与760 ℃终锻相比,820 ℃终锻温度下试样的磨损体积减小了47.37%,冲击吸收功增大了24.53%。新型汽车差速器齿轮用20CrMnTiVSr试样的锻压工艺参数优选为:1 220 ℃始锻温度、820 ℃终锻温度。

     

    Abstract: 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 ℃.

     

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