The steel and the heat treatment process of fine heavy load drift was determined by means of production tests. And the satisfactory result was obtained.
经应用试验，确定了精密重载冲孔模的用材及热处理工艺，获得满意的效果。
The steel and the heat treatment process of fine heavy load drift was determined by means of production tests. And the satisfactory result was obtained.
经应用试验，确定了精密重载冲孔模的用材及热处理工艺，获得满意的效果。
应用推荐