摘要
高强度马氏体钢具有较高的强度,但对氢脆较敏感,氢致延迟开裂是高强度马氏体钢失效的主要原因。通过氢渗透试验、预充氢拉伸试验和热力学计算研究了H750MS钢和TZ750MS钢的氢致延迟开裂现象。结果表明:TZ750MS钢比H750MS钢更易发生氢致延迟开裂;H750MS钢比TZ750MS钢具有更多的作为氢陷阱的(Ti,Nb)C与Fe_(3)C相,因此具有更高的强度和更低的氢致延迟开裂敏感性。
High-strength martensitic steel possesses higher strength but is relatively sensitive to hydrogen embrittlement.The failure of high-strength martensitic steel stems largely from hydrogen-induced delayed cracking.The hydrogen-induced delayed cracking phenomenon of H750MS and TZ750MS steels was investigated by hydrogen permeation test,pre-hydrogen-filling tensile test and thermodynamic calculation.The results showed that the hydrogen-induced delayed cracking was easier to occur in TZ750MS steel than in H750MS steel,and that H750MS steel had more(Ti,Nb)C and Fe_(3)C phases as hydrogen traps,thereby higher strength and lower hydrogen embrittlement susceptibility compared with TZ750MS steel.
作者
李丰
郭晓培
李涛
马德刚
李建英
孙璐
杨雯蕊
LI Feng;GUO Xiaopei;LI Tao;MA Degang;LI Jianying;SUN Lu;YANG Wenrui(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan Hebei 063210,China;School of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Tangshan Iron&Steel Group Co.,Ltd.,Tangshan Hebei 063016,China)
出处
《上海金属》
CAS
2023年第4期45-50,55,共7页
Shanghai Metals
基金
河北省自然科学基金(E2020318006)
唐山市科技创新团队培养计划项目(21130209D)
2021年度河北省引进留学人员资助项目(C20210309)。
关键词
马氏体钢
氢脆敏感性
氢致延迟开裂
martensitic steel
hydrogen embrittlement susceptibility
hydrogen-induced delayed cracking
