摘要
采用化学分析、扫描电子显微镜、全自动洛氏硬度计、光学显微镜等手段,对断裂的高强度锁扣进行了成分、断口形貌、硬度及组织等分析。分析结果表明,锁扣断裂原因为酸洗和电镀工序渗氢,且镀锌后未及时进行去氢处理,导致车门锁扣在装配前即发生氢致延迟断裂。同时,本文对氢脆提出了预防控制措施。
The chemical composition,microstructure,hardness,and fracture morphology were tested through chemical analysis,scanning electron microscopy,automatic Rockwell hardness,optical microscope,etc.The results show that the reason for locker fracture is hydrogen embrittlement in the acid pickling and electroplating process and dehydrogenation treatment is not conducted timely after galvanization.The prevention method of hydrogen embrittlement is proposed in this paper.
作者
田新中
Tian Xinzhong(Xingtai Iron&Steel Co.,Ltd.,Xingtai,Hebei,054027;Hebei Engineering Research Center for Wire Rod,Xingtai,Hebei,054027)
出处
《河北冶金》
2019年第7期5-7,60,共4页
Hebei Metallurgy
关键词
SCM435钢
车门锁扣
断裂
渗氢
氢脆
SCM435 steel
door locker
fracture
hydrogen permeation
hydrogen embrittlement
