Quality Control of Heat Treatment of A 30CrMnSiNi2A Shoulder Shaft
The heat treatment process of a 30CrMnSiNi2 A shoulder shaft was analyzed,vacuum oil cooling quenching was used to replace the previous nitrate isothermal quenching,and some measures were taken according to the problems in production.By adding stress relieving tempering before heat treatment,heat-ing the quenching oil to 50-90 ℃ and cooling without stirring,the heat treatment deformation of the shoulder shaft was reduced.Using a pressure controlled press,clarified the thermal calibration specifica-tions for the deformed shoulder shaft,avoiding repeated calibration.By cutting hardness test sample on the shoulder shaft parts after heat treatment,the problem of inaccurate hardness measurement values caused by improper operation due to excessive shoulder shaft size was avoided.The stability of heat treatment quality of shoulder shaft parts was ensured.
万方数据
维普
