| T91/12Cr1MoV异质接头焊接残余应力模拟与分析 |
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| 引用本文： | 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): 126-131,157 |
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| 作者姓名： | 高巍 姜勇 巩建鸣 陈虎 竺国荣 沈利民 |
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| 作者单位： | 1. 南京工业大学机械与动力工程学院,江苏省南京市,210009
2. 宁波特种设备检验研究院,浙江省宁波市,315020 |
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| 基金项目： | 宁波市自然科学基金项目 |
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| 摘 要： | T91/12Cr1MoV异质接头广泛应用于热电厂主蒸汽管线。由于母材及焊材金属性能的差异,导致该异质接头中会产生较大的焊接残余应力,常常会引起早期失效。利用有限元软件ABAQUS,采用热力顺次耦合的计算程序,对主蒸汽管中T91/12Cr1MoV异质接头的焊管外表面和熔合线方向的焊接残余应力分布进行了模拟,并分析了焊后热处理对焊接残余应力的影响。结果表明,热处理前,焊接残余应力峰值位于管道外表面焊缝两侧的焊接热影响区,其中,以T91侧热影响区的应力峰值最高。焊后热处理可以有效降低焊接热影响区的残余应力峰值,且对12Cr1MoV侧热影响区残余应力的改善效果明显优于T91侧热影响区。
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| 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 |
Numerical Simulation and Analysis of Welding Residual Stress in T91/12Cr1MoV Dissimilar Welded Joint |
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| GAO Wei , JIANG Yong , GONG Jianming , CHEN Hu , ZHU Guorong , SHEN Limin. Numerical Simulation and Analysis of Welding Residual Stress in T91/12Cr1MoV Dissimilar Welded Joint[J]. Proceedings of the CSEE, 2012, 32(26): 126-131,157 |
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| Authors: | GAO Wei JIANG Yong GONG Jianming CHEN Hu ZHU Guorong SHEN Limin |
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| Affiliation: | 1(1.College of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing 210009,Jiangsu Province,China; 2.Ningbo Special Equipment Inspection Center,Ningbo 315020,Zhejiang Province,China) |
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| Abstract: | T91/12Cr1MoV 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 T91/12Cr1MoV 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 12Cr1MoV BM heat affect zones(HAZ) have peak residual stresses and the stress amplitude in HAZ of T91 side is larger than that of 12Cr1MoV side.The PWHT could relieve residual stress in both HAZs,while the effect in 12Cr1MoV side is more remarkable than in T91 side. |
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| Keywords: | thermal power engineering main steam pipelines dissimilar joint heat treatment welding residual stress finite element method T91 steel |
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