Residual stress, carbon segregation and acid cleaning after cold drawing played decisive roles in the hydrogen-induced cracking.

 
  • 螺桿心部具有高的殘余應力、較嚴重的碳偏析及拉拔后的酸洗為螺桿心部出現HIC空洞提供了條件。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan