渗碳前预热处理对17CrNiMo6钢制齿轮轴畸变的影响

Effect of pre-heat treatment before carburizing on distortion of gear shaft made of 17CrNiMo6 steel

以17CrNiMo6钢制齿轮轴为研究对象,用有限元软件对齿轮轴的渗碳预热和直接渗碳过程进行了定量分析,确定了影响畸变的主要预热工艺参数,并对这两种过程中的温度场和应力场进行了对比分析,研究预热处理对齿轮轴热处理畸变的影响。结果表明,在渗碳前进行400℃保温3 h的预热处理,能够有效减小齿轮轴热处理畸变。

Taking 17 CrNiMo6 steel gear shaft as the research object,carburizing with pre-heat and direct carburizing processes of the gear shaft were quantitatively analyzed by finite element software,and the main pre-heat process parameters affecting the heat treatment distortion of the gear shaft were determined.The temperature field and stress field in the two processes were compared and analyzed,and the effect of pre-heat treatment on the heat treatment distortion of gear shaft was studied.The results show that pre-heat treatment at 400℃ for 3 h before carburizing can effectively reduce the heat treatment distortion of the gear shaft.