X80钢GMAW焊接接头力学性能评定与微观组织分析  

Evaluation of Mechanical Properties and Microstructural Analysis of X80 Steel Gas Metal Arc Welding Welded Joints

作　　者：燕集中[1,2] 浦江 孟不凡[3] 赵建平 张涛[1] YAN Ji-zhong;PU Jiang;MENG Bu-fan;ZHAO Jian-ping;ZHANG Tao(Special Equipment Safety Supervision Inspection Institute of Jiangsu Province,Nanjing 210036,China;National Quality Inspection&Test Center of Pressure Pipe Components,Nanjing 211161,China;Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]江苏省特种设备安全监督检验研究院,江苏南京210036 [2]国家压力管道元件质量检验检测中心,江苏南京211161 [3]南京工业大学,江苏南京211816

出　　处：《石油化工设备》2024年第6期20-28,共9页Petro-Chemical Equipment

基　　金：江苏省市场监督管理局科研项目(KJ204106):X80钢制压力管道安全性能及完整性管理技术的研究。

摘　　要：通过对X80钢焊接接头进行残余应力测定、力学性能评定试验和微观组织分析,评价采用全自动熔化极气体保护电弧焊(GMAW)焊接的X80钢管是否满足API Spec 5L—2018《管线钢管》的使用规定。结果表明,X80钢焊接接头环向残余应力值高于轴向残余应力值,焊接接头拉伸强度值高于名义抗拉强度值,焊缝低温冲击性能略低于母材和热影响区,焊接接头总体韧性合格,侧弯试样性能满足验收标准。所采用的GMAW工艺满足实际工程要求,可作为一种可行的X80钢焊接工艺。The evaluation of the residual stress,the mechanical properties testing,and the analysis of microstructure of the X80 steel pipe welded joint was conducted to ascertain the suitability of the fully automatic gas metal arc welding(GMAW)process for the requirements of API Spec 5L-2018"Line Pipe".The results demonstrate that the circumferential residual stress of the welded joint is greater than the axial residual stress.The tensile strength of the welded joint is higher than the nominal tensile strength.The low-temperature impact performance of the weld joint is slightly lower than that of the base material and the heat-affected zone,and the overall toughness of the weld joint is satisfactory.The lateral bending samples generally meet the acceptance criteria.The GMAW welding process is capable of meeting the practical engineering requirements and can be used as a viable welding process for X80 pipeline steel.

关 键 词：X80钢 熔化极气体保护电弧焊 力学性能 微观组织 

分 类 号：TG444[金属学及工艺—焊接]