Abstract：The fracture failure of one mechanical sensor occurred during the delivery inspection. In order to find out the causes of failure and to prevent the recurrence of this failure event, the mechanical property, metallographic structure and fracture morphology of this sensor was analyzed. The fracture causes were determined. The results showed that the failure mode of sensor was hydrogen-induced delay cracking. High content of hydrogen in material and the poor machining quality in the fracture position were main causes for the hydrogen-induced cracking of sensor. The improvement measures were also proposed.
高秀者,戴起勋,朱向群.热处理对40CrNiMo钢弹性体滞后性的影响[J].金属热处理,2009,34(10):57-60.GAO Xiu-zhe,DAI Qi-xun,ZHU Xiang-qun.Effect of heat treatment on hysteresis property of 40CrNiMo steel spring element[J].Heat Treatment of Metals,2009,34(10):57-60.
[4]
李许明,郭伟杰,闫磊,等.时效处理对0Cr17Ni4Cu4Nb马氏体沉淀硬化不锈钢组织与性能的影响[J].热加工工艺,2014,43(24):209-212.LI Xu-ming,GUO Wei-jie,YAN Lei,et al.Effect of aging treatment on microstructure and properties of 0Cr17Ni4Cu4Nb martensitic precipitation-harding stainless steel[J].Hot Working Technology,2014,43(24):209-212.
[5]
刘德林,陶春虎,刘昌奎,等.钢氢脆失效的新现象和新认识[J].失效分析与预防,2015,10(6):376-383.LIU De-lin,TAO Chun-hu,LIU Chang-kui,et al.New phenomenons and knowledge of steel hydrogen embrittlement[J].Failire Analysis and Prevention,2015,10(6):376-383.
[6]
谌康,夏彬,徐乐,等.2000MPa级马氏体钢的氢脆敏感性[J].材料热处理学报,2017,38(8):76-82.SHEN Kang,XIA Bin,XU Le,et al.Hydrogen embrittlement susceptibility of 2000MPa grade matensitic steels[J].Transactions of Materials and Heat Treatment,2017,38(8):76-82.
[7]
Maoqiu Wang,Eiji Akiyama,Kaneaki Tsuzaki.Determination of the critical hydrogen concentration for delayed fracture of high strength steel by constant load test and numerical calculation[J].Corrosion Science,2006,48(8):2189-2202.
[8]
赵莉萍,杨慧,李慧琴.固溶处理和时效对17-4PH沉淀硬化不锈钢组织性能的影响[J].特殊钢,2003,24(3):24-25.ZHAO Li-ping,YANG Hui,LI Hui-qin.Effect of solid solution and aging on structure and properties of 17-4PH precipitation-hardening stainless steel[J].Special Steel,2003,24(3):24-25.
[9]
Sicong Shen,Xinfeng Li,Peng Zhang,et al.Effect of solution-treated temperature on hydrogen embrittlement of 17-4PH stainless steel[J].Materials Science & Engineering A,2017,703:413-421.
