石油与天然气化工2025，Vol.54Issue(1)：118-124,7.DOI:10.3969/j.issn.1007-3426.2025.01.016
高压纯氢环境对X80管线钢焊接接头氢脆敏感性的影响
Influence of high-pressure pure hydrogen environment on hydrogen embrittlement susceptibility of X80 pipeline steel welded joints
摘要
Abstract
Objective The study investigates the effect of high-pressure pure hydrogen environment on the hydrogen embrittlement susceptibility of X80 pipeline steel welded joints,providing a reference for the hydrogen blending welding process of natural gas pipelines.Method By employing impact tests and slow strain rate tensile tests,combined with SEM fracture analysis and plasticity index calculation,the hydrogen embrittlement susceptibility of X80 pipeline steel welded joints in a 6.3 MPa high-pressure pure hydrogen environment was investigated.Result Firstly,both the strength and plasticity index of the heat-affected zone and weld metal of X80 pipeline steel decreased in a 6.3 MPa pure hydrogen environment,demonstrating a certain susceptibility to hydrogen embrittlement.Secondly,the fracture surface of the specimens exhibited a transition from ductile to brittle fracture,characterized by cleavage facets along the fracture edges.Thirdly,calculation results of the plasticity index ratio and elongation reduction rate indicated that the weld metal exhibited higher hydrogen embrittlement susceptibility compared to the heat-affected zone in the 6.3 MPa pure hydrogen environment.Conclusion The susceptibility of welded joints of X80 pipeline steel to hydrogen embrittlement significantly decreases in a 6.3 MPa high-pressure pure hydrogen environment,with lower section shrinkage,elongation,and tensile strength compared to atmospheric air environment.关键词
高压纯氢环境/X80管线钢/焊接接头/氢脆/冲击试验/拉伸试验Key words
high-pressure pure hydrogen environment/X80 pipeline steel/welded joints/hydrogen embrittlement/impact test/tensile test引用本文复制引用
王鹏涛,崔崇,孙晨,鲁仰辉,刘伟,杨志文..高压纯氢环境对X80管线钢焊接接头氢脆敏感性的影响[J].石油与天然气化工,2025,54(1):118-124,7.基金项目
国家重点研发计划"纯氢与天然气掺氢长输管道输送及应用关键技术"(2022YFB4003400) （2022YFB4003400）
国家电力投资集团有限公司科研项目"天然气管道长距离掺氢输送与终端应用关键技术研究"(KYB12022QN02) （KYB12022QN02）
