摘要
对X80管材开展不同掺氢比环境的气相氢渗透测试和慢应变速率拉伸测试,并结合微观形貌分析的方法,研究掺氢环境下X80管材氢渗透和氢损伤行为。实验结果表明,随着掺氢比的增加,除氢扩散系数D_(eff)无明显变化外,其他氢渗透动力学参数呈上升趋势,管材氢脆敏感性增加;在掺氢30%环境下,管材抗拉强度较常压空气环境变化不显著,断后伸长率和断面收缩率减小,管材塑性下降;缺口拉伸试样断口边缘出现脆性解理形貌,材料发生脆性转变。
In this paper,gas phase hydrogen permeability test and slow strain rate tensile test were carried out for X80 pipeline steel in different hydrogen-doped environments,and combined with the method of micromorphology analysis,hydrogen permeability and hydrogen damage behavior of X80 pipeline steel in hydrogendoped environments were studied.The experimental results show that with the increase of hydrogen doping ratio,except for the hydrogen diffusion coefficient(D_(eff)),other hydrogen permeation kinetic parameters show an increasing trend,which indicates that the hydrogen embrittance sensitivity of the pipe increases with the increase of hydrogen doping ratio.When hydrogen is added to 30%,the tensile strength of the pipe line steel does not change significantly compared with that of the atmospheric air environment,and the elongation and section shrinkage after fracture decrease,and the ductility of the pipeline decreases.The fracture edge of the notched tensile specimens showed brittle cleavage morphology,and the material underwent brittle transformation.
作者
徐猛
王铁军
常雪伦
葛贵君
于文涛
刘海龙
孙晨
杨飞
刘晓童
鲁仰辉
刘伟
XU Meng;WANG Tiejun;CHANG Xuelun;GE Guijun;YU Wentao;LIU Hailong;SUN Chen;YANG Fei;LIU Xiaotong;LU Yanghui;LIU Wei(State Power Investment Corporation Research Institute Company Limited,Beijing 102209,China;Inner Mongolia Huomeihongjun Aluminum-Electricity Limited Liability Company Zhahanaoer Branch,Tongliao 029100,Inner Mongolia,China;Safetech Research Institute(Beijing)Company Limited,Beijing 102209,China)
出处
《力学与实践》
2025年第1期131-138,共8页
Mechanics in Engineering
基金
国家重点研发计划“氢能技术”重点专项(2022YFB4003400)
内蒙古自治区科技重大专项(2021ZD0038)
国家电力投资集团统筹经费支持项目(KYB12022QN02)资助。
关键词
X80管线钢
氢脆
掺氢比
气相氢渗透
X80 pipeline steel
hydrogen embrittlement
hydrogen doping ratio
gas phase hydrogen permeation
