采用GMAW工艺的X80环焊接头组织和性能研究  

Microstructure and Mechanical Properties of X80 Girth Welded Joint by GMAW Process

作　　者：齐丽华 胡颖 王春林 张世杰 高雄雄 杨耀彬 陈越峰 QI Lihua;HU Ying;WANG Chunlin;ZHANG Shijie;GAO Xiongxiong;YANG Yaobin;CHEN Yuefeng(State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials/Key Laboratory of Petroleum Tubular Goods and Equipment Quality Safety for State Market Regulation,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;PipeChina,Beijing 100010,China;Jiangsu Natural Gas Pipeline Co.Ltd.,yancheng,Jiangsu 224000,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,石油管材及装备材料服役行为与结构安全国家重点实验室/国家市场监管重点实验室(石油管及装备质量安全),陕西西安710077 [2]国家管网集团工程建设本部,北京100010 [3]国家管网集团江苏天然气管道有限责任公司,江苏盐城224000

出　　处：《石油管材与仪器》2023年第5期22-26,共5页Petroleum Tubular Goods & Instruments

基　　金：国家管网科研课题“管道施工装备及焊接材料性能提升研究专题一国产焊接材料性能提升研究”(编号:PNPCM-GCGL-GSGG-FWJF-2022-191);国家管网科研课题“高钢级(X80)管道环焊缝缺陷容限评估准则及关键技术研究”(编号:GDXB22-2019-017);国际焊接中心支撑研究项目“焊接材料强度失配和热影响区软化行为研究”。

摘　　要：通过环焊接头的微观组织分析、力学性能试验和现场焊口破坏性能测试的大数据统计分析明确采用全自动实心焊丝焊接工艺(GMAW)的新建X80高钢级油气输送管道环焊接头的组织性能特点。结合微拉伸测试方法、根部微尺寸韧性测试分析环焊接头的整体性能分布特征,结合管道环焊接头在服役过程中的受力情况,利用数值模拟计算方法建模分析不同强度匹配环焊接头的起裂韧性,为解决X80管线钢环焊接头起裂韧性指标提供理论和技术支持,保证高钢级管道建设的安全施工和运营。Methods including micro-structure investigation,mechanical properties test and big data statistical analysis of field weld performance are used to clarify the micro-structure and mechanical characteristics of girth welded joint of the automatic gas shield metal arc welding(GMAW)process of on-site X80 high-grade oil and gas transmission pipeline.Combined with the micro tensile test and micro-size toughness test of root pass,the overall distribution characteristics of the girth welded joint are analyzed.Combined with the stress of pipeline girth weld in service,numerical simulation method is used to model and analyze the cracking toughness of different strength matched girth welded joint,which provides theoretical and technical support for solving the cracking toughness index of X80 pipeline girth welded joints,so as to ensure the safe construction and operation of high steel grade pipeline.

关 键 词：力学性能 微拉伸 起裂韧性 数值模拟 

分 类 号：TG142[一般工业技术—材料科学与工程]