By the observation of microstructure of brake wheel, its failure is created by bigger metallurgical structure resulted by improper conditioning heat treatment and repeated face hardening.

 
  • 通过对制动轮显微组织观察,制动轮失效原因主要是由于预先热处理工艺不当造成组织粗大以及产生重复表面淬火所致。
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