焊管2025，Vol.48Issue(7)：60-66,7.DOI:10.19291/j.cnki.1001-3938.2025.07.008
不同自动焊工艺下X80管道环焊缝性能对比分析
Comparative Analysis of Performance of X80 Pipeline Girth Weld under Different Automatic Welding Process
摘要
Abstract
To ensure the efficient and safe operation of oil and gaspipelines,two sets of X80 grade steel pipes with dimensions Φ1 219 mm×27.5 mm were welded using either the automatic gas metal arc welding(GMAW)process or the combined automatic welding process(GTAW+FCAW-G),respectively.The microstructure,tensile strength,impact toughness,and fracture toughness of the welded joints were analyzed to investigate the differences in structural characteristics and mechanical properties resulting from the different welding techniques.The results indicate that the tensile strength,yield strength,impact toughness,and fracture toughness of the automatic weldinggirth weld joint are superior to those of the combined automatic welding process.The tensile strength and yield strength of the welded joints produced by two automatic welding processes exceed 680 MPa and 600 MPa,respectively.In addition,welded joints have good impact toughness and fracture toughness at-10℃,with a ductile brittle transition temperature below-50℃and CTOD values greater than 0.254 mm.The weld microstructure produced by both processes were fine and uniformly distributed,with the fully automatic welding process demonstrating superior microstructural properties.关键词
X80管道/自动焊/微观组织/韧脆转变/断裂韧度Key words
X80 pipeline/automatic welding/microstructure/ductile brittle transition/fracture toughness分类
矿业与冶金引用本文复制引用
杨大慎,刘剑,牛虎理,孙欣妍,张以诺..不同自动焊工艺下X80管道环焊缝性能对比分析[J].焊管,2025,48(7):60-66,7.基金项目
国家石油天然气管网集团有限公司科学研究与技术开发项目"管道新型焊接装备研制与应用"(项目编号SJSG202201). （项目编号SJSG202201）
