35CrMo合金钢芯轴断裂失效分析
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摘要
35Cr Mo合金钢芯轴在使用过程中突然断裂,对其化学成分、力学性能、显微组织、非金属夹杂、断口形貌等进行检测分析。结果表明,35Cr Mo芯轴的断裂以脆性断裂为主,主要是由于钢中的氢含量超标,在芯轴中心部位形成了大量白点,导致材料塑性显著下降,脆性急剧增加,从而引起了断裂。
A 35CrMo alloy-steel mandrel was suddenly broken down in the operation. The chemical composition,mechanical properties,microscopic structure,non-metallic inclusion and fracture morphology of the mandrel were detected and analyzed. The results show that many flake defects were formed at the center of the mandrel because of excessive hydrogen,and this led to significant decrease of ductility and dramatic increase of brittleness for the steel,leading to final break out.
A 35CrMo alloy-steel mandrel was suddenly broken down in the operation. The chemical composition,mechanical properties,microscopic structure,non-metallic inclusion and fracture morphology of the mandrel were detected and analyzed. The results show that many flake defects were formed at the center of the mandrel because of excessive hydrogen,and this led to significant decrease of ductility and dramatic increase of brittleness for the steel,leading to final break out.
引文
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[2]Anming Li,Mengjuan Hu.Effect of sub-temperature quenching temperature on microstructure and property of 35Cr Mo steel[J].Advanced Materials Research,2012:490-495//3257-3261.
[3]陈智娟,苗国民,孙明学.35Cr Mo合金钢电机转轴断裂失效分析[J].金属热处理,2010,35(6):103-105.
[4]陈襄武.炼钢过程的脱氧[M].北京:冶金工业出版社,1989.
[5]冯朋飞.不同热处理工艺对35Cr Mo钢应力腐蚀敏感性影响的研究[D].成都:西南石油大学,2011.
[6]陆金二.35Cr Mo钢的热处理[J].热处理,1999(4):25-28.