What is obtained with the forging waste heat normalizing and controlled cooling technique is the coarse stable structure in a 20CrMnTi gear, but its cutability is good.

余热正火常规的正火理后，再经同样的工艺碳、淬火回火理，试验证明：其心部的组织、晶粒度及机械性能均相同。

The material cutability is described and evaluated with a target system and the fuzzy comprehensive evaluation method.

试图用指标体系来描述评价材料的切削加工性。