钛含量对汽车用贝氏体-马氏体双相钢抗氢脆行为的影响  

Effect of titanium content on hydrogen embrittlement behavior of bainite/martensite dual-phase steel

作　　者：李峥杰 张玮 刘小军 Li Zhengjie;Zhang Wei;Liu Xiaojun(Hebi College of Engineering and Technology,Henan University of Technology,Hebi 458030,Henan,China;Anyang Iron and Steel Co.,Ltd.,Anyang 455000,Henan,China)

机构地区：[1]河南理工大学鹤壁工程技术学院,河南鹤壁458030 [2]安阳钢铁股份有限公司,河南安阳455000

出　　处：《钢铁钒钛》2023年第3期171-176,共6页Iron Steel Vanadium Titanium

基　　金：中央高校基本科研业务费专项资金资助项目(300202118302)。

摘　　要：冶炼了三种不同钛含量(0、0.9%和1.8%)的贝氏体-马氏体双相钢,通过热处理调整试样中贝氏体含量使其保持相同的强度水平,借助电化学充氢和慢应变速率拉伸试验手段研究了贝氏体含量对贝氏体-马氏体双相钢抗氢脆行为的影响。试验结果表明,钛含量为1.8%的试验钢中具有最高的贝氏体含量和最优异的抗氢脆性能,这主要归因于渗碳体-铁素体界面位错等不可逆陷阱对氢原子的俘获作用。为了提高贝氏体-马氏体双相钢的抗氢脆能力,可增加贝氏体组织中细小渗碳体颗粒的数量,为塑性变形过程中氢的迁移提供更多的不可逆氢陷阱。Three kinds of bainite/martensite dual-phase steels with different titanium content(0,0.9,and1.8 wt%) were smelted in this paper.The bainite content in the samples was changed by heat treatment to maintain the same strength level.The effect of bainite content on the hydrogen embrittlement resistance of bainite/martensite dual-phase steel was studied by electrochemical hydrogen charging and a slow strain rate tensile test.The results show that the test steel with a titanium content of 1.8 wt% has the highest bainite content and the best resistance to hydrogen embrittlement,mainly due to the capture of hydrogen atoms by irreversible traps such as cementite ferrite interface dislocations.In order to improve the hydrogen embrittlement resistance of bainite/martensite dual-phase steel,the number of fine cementite particles in the bainite structure can be increased,which provides more irreversible hydrogen traps for hydrogen migration during plastic deformation.

关 键 词：双相钢 钛含量 氢陷阱 氢脆行为 

分 类 号：TF823[冶金工程—有色金属冶金] TF76