高强度马氏体钢氢致延迟开裂研究  

Study on Hydrogen-Induced Delayed Cracking of High-Strength Martensitic Steel

作　　者：李丰 郭晓培 李涛 马德刚[3] 李建英[3] 孙璐[3] 杨雯蕊[1] 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)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]重庆大学材料科学与工程学院,重庆400044 [3]唐山钢铁集团有限责任公司,河北唐山063016

出　　处：《上海金属》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)。

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.

关 键 词：马氏体钢 氢脆敏感性 氢致延迟开裂 

分 类 号：TG142[一般工业技术—材料科学与工程]