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石油化工主轴的受力情况比较复杂,需要承受较大冲击和交变载荷的作用,要求具有良好的综合力学性能。4Cr16Mo材料具有较高硬度、耐磨性及耐冲击性,能够满足使用中的性能要求;但塑性较差,变形抗力大,锻造温度范围较窄,锻造工艺存在较大难度。本文通过生产跟踪,对生产工艺进行优化:确定锻造温度范围为800～1150℃,低温段缓慢加热;锻造时采用上平、下V砧,严格控制压下量,高温时采用分散小变形,并严格执行锻后退火及性能热处理,大大减少了主轴开裂,在生产中取得了良好的效果。
The stress of the petrochemical main shaft is complicated and needs to bear the impact of greater impact and alternating load, and requires good comprehensive mechanical properties. 4Cr16Mo material with high hardness, wear resistance and impact resistance, to meet the performance requirements in use; but less plastic, deformation resistance, forging temperature range is narrow, the forging process is more difficult. In this paper, the production process is optimized through the following steps: the forging temperature range is 800 ~ 1150 ℃, the low temperature is slowly heated; the upper and lower V anvil are forged, the reduction is strictly controlled, and the small deformation is used Strict implementation of forging annealing and performance heat treatment, greatly reducing the spindle cracking, and achieved good results in the production.