中国电机工程学报2012，Vol.32Issue(26)：126-131,6.
T91/12Cr1MoV异质接头焊接残余应力模拟与分析
Numerical Simulation and Analysis of Welding Residual Stress in T91/12Cr1MoV Dissimilar Welded Joint
摘要
Abstract
T91/12CrlMoV dissimilar welded joint is widely used in main steam pipelines of power plant, and because of the different material properties of weld-metal (WM) and base-metal(BM), high welding residual stress occurred in this joint. This high residual stress would induce failure in early life of joint. By using ABAQUS software and succession coupling thermal stress computation program, welding residual stress distribution on the outer surface and along the fusion line through the wall thickness direction of T91/12CrlMoV dissimilar welded joint was analyzed. The influence of post weld heat treatment (PWHT) on welding residual stress was studied either. Numerical simulation results show both T91 and 12CrlMoV BM heat affect zones (HAZ) have peak residual stresses and the stress amplitude in HAZ of T91 side is larger than that of 12CrlMoV side. The PWHT could relieve residual stress in both HAZs, while the effect in 12CrlMoV side is more remarkable than in T91 side.关键词
热能动力工程/主蒸汽管线/异质接头/热处理/焊接残余应力/有限元方法/T91钢Key words
thermal power engineering/ main steam pipelines/ dissimilar joint/ heat treatment/ welding residual stress/ finite element method/ T91 steel分类
矿业与冶金引用本文复制引用
高巍,姜勇,巩建鸣,陈虎,竺国荣,沈利民..T91/12Cr1MoV异质接头焊接残余应力模拟与分析[J].中国电机工程学报,2012,32(26):126-131,6.基金项目
宁波市自然科学基金项目(2009A610023). （2009A610023）
