紧固件用Cr-Ni-Mo钢在调质和等温淬火条件下氢致延迟断裂的对比研究  

Comparison of Delayed Fracture Behavior of Cr-Ni-Mo Steel for Fastener by Quenching & Tempering and Isothermal Quenching

作　　者：Tuguldur Unenbayar 李茂仁 赵明纯[1] 汪砖 许晓嫦[1] 李红英[1] 付平安 刘超[1] Tuguldur Unenbayar;LI Mao⁃ren;ZHAO Ming⁃chun;WANG Zhuan;XU Xiao⁃chang;LI Hong⁃ying;FU Ping⁃an;LIU Chao(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China;Lengshuijiang Tianbao Industrial Co Ltd,Loudi 417500,Hunan,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]冷水江天宝实业有限公司,湖南娄底417500

出　　处：《矿冶工程》2019年第6期120-123,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51874368)

摘　　要：采用阴极充氢、慢应变速率拉伸等试验方法,研究了40CrNiMoA钢在调质和等温淬火条件下的氢致延迟断裂行为。实验结果表明,在等温淬火条件下40CrNiMoA钢的抗氢致延迟断裂能力相对调质条件下的性能显著提高,并且具有更高的硬度和抗拉强度。The hydrogen-induced delayed fracture behavior of 40 CrNiMoA steel by treatments of quenching & tempering, and isothermal quenching was studied by using cathodic hydrogen-charging and slow strain rate testing. The experimental results indicate that compared with that by quenching & tempering, 40 CrNiMoA steel by isothermal quenching has the resistance to hydrogen-induced delayed fracture significantly improved and also has higher hardness and tensile strength.

关 键 词：紧固件 Cr-Ni-Mo钢 氢致延迟断裂 调质 等温淬火 下贝氏体 

分 类 号：TB302[一般工业技术—材料科学与工程]