X70管道环焊缝接头残余应力数值模拟  

Residual stress simulation of X70 pipeline girth welding joint

作　　者：杨天冰[1] 郭瑞杰[1] 

机构地区：[1]中国石油天然气管道科学研究院,河北廊坊065000

出　　处：《电焊机》2008年第11期9-14,共6页Electric Welding Machine

摘　　要：管线钢X70在西气东输和中亚管道工程中得到了广泛使用,是未来管道建设的主流钢种。针对X70,根据试验确定管道环缝焊接过程的热源模型,并利用数值模拟软件Sysweld计算焊接热循环过程,确定焊接接头温度和应力的变化过程及其分布,以及焊后残余应力的大小和分布。试验表明,计算的焊后残余应力与实测值完全一致。Linepipe X70 will be main steel alloy grade in a long time,which has been used in West-To-East and Trans-Asia Gas Pipeline projects.Aiming at X70,this paper constitutes a heat source model of pipeline girth weld based on testing,simulates heat cycle process during welding by using numerical simulation software Sysweld,and determines variety process and distribution of temperature and stress in welding joint during weldlng,and magnitude and distribution of post weld.Simulation results are well in accordance with measured values by testing.

关 键 词：X70 环焊接头 数值模拟 温度场 残余应力 

分 类 号：TG457.6[金属学及工艺—焊接]