焊管2026，Vol.49Issue(8)：43-51,9.DOI:10.19291/j.cnki.1001-3938.2026.08.005
X65/316L复合管管端堆焊Inconel 625环焊接头氢分布预测
Hydrogen Distribution Prediction of Girth Welded Joint with Inconel 625 Overlay at Pipe-end of X65/316L Composite Pipe
摘要
Abstract
The girth welded joint of hydrogen-transporting composite pipes are prone to localized hydrogen enrichment due to the coupling of dissimilar materials and welding residual stresses,which restricts safety assessment.To address the challenge of in-situ measurement of hydrogen distribution in service joints,hydrogen permeation tests,thermal desorption analysis,and sequential multiphysics coupling simulations were combined to obtain hydrogen permeation parameters and the stress field of the X65/Inconel 625 joint.A stress-structure-coupled hydrogen diffusion model was established to predict hydrogen distribution in the girth welded joint under 12 MPa pure hydrogen conditions.The results show that when using composite pipes,the peak hydrogen concentration in the X65 steel matrix decreases from 18.5×10-8 in homogeneous steel pipes to 2.2×10-8,a reduction of 88.11%.Localized hydrogen enrichment occurs at the interface between the root weld pass and the overlay weld layer,which is prone to becoming a preferential initiation site for hydrogen-induced failure.The findings provide a basis for evaluating the applicability of X65/316L mechanical composite pipe girth welded joints under high-pressure hydrogen transmission conditions.关键词
X65/316L机械复合管/管端堆焊/Inconel 625/氢扩散/焊接残余应力Key words
X65/316L mechanical composite pipe/pipe-end overlay welding/Inconel 625/hydrogen diffusion/welding residual stress分类
矿业与冶金引用本文复制引用
高彦伟,刘云蕊,马明,刘庆儒,赵卫民,韩彬,孙建波..X65/316L复合管管端堆焊Inconel 625环焊接头氢分布预测[J].焊管,2026,49(8):43-51,9.基金项目
中国石油工程建设有限公司项目"纯氢长输复合管道环焊缝性能分析及焊接技术研究"(项目编号CPECC2024KJ20) （项目编号CPECC2024KJ20）
江苏省前沿技术研发计划项目"埋地纯氢/掺氢天然气管道安全输气关键技术研发"(项目编号BF2024057). （项目编号BF2024057）
