GH4169与0Cr18Ni9异种合金氩弧焊焊后残余应力分析  

Analysis of residual stresses of GH4169 and 0Cr18Ni9 dissimilar alloys after TIG welding

作　　者：王海燕 赵磊 李响 WANG Haiyan;ZHAO Lei;LI Xiang(Aecc South Industry Company Limited,Zhuzhou 412000,Hunan pro.,China;Shandong Huawin Electrical and,Mechanical Technology Co.,Ltd,Jinan 250101,Shandong pro.,China)

机构地区：[1]中国航发南方工业有限公司,湖南株洲412000 [2]山东华云机电科技有限公司,山东济南250000

出　　处：《焊接技术》2023年第1期101-105,I0008,共6页Welding Technology

摘　　要：采用填丝TIG焊将镍基高温合金GH4169平板与奥氏体不锈钢0Cr18Ni9平板对接焊接,在保证焊缝焊接质量可靠后,对其焊后残余应力分布状态进行分析。对焊缝进行正面弯曲试验,焊缝及热影响区均无裂纹生成,焊缝力学性能合格。通过有限元模拟方式对焊缝区域的应力分布状态进行分析,并利用实际测量的应力数值对其进行检验。经对比与分析,有限元模拟结果与盲孔法实际测得数值基本相近;试板焊后应力集中区域位于焊缝余高中央及GH4169侧焊趾外侧区域,等效残余应力最大值可达457 MPa;焊后主应力方向为纵向,焊缝附近区域呈现明显的拉应力状态,GH4169侧试板中心存在一较大的压应力。The nickel-based superalloy GH4169 flat plate and the austenitic stainless steel 0Cr18Ni9 flat plate were butt welded by TIG welding with filler wire. After ensuring the reliable welding quality of the weld, the residual stress distribution state after welding was analyzed. The frontal bending test was performed on the weld, and no crack was formed in the weld and the heat affected zone, and the mechanical properties of the weld were basically reliable. The stress distribution state of the weld area was analyzed by finite element simulation, and the actual measured stress values were used to check it. After comparison and analysis, the finite element simulation results were basically similar to the actual values measured by the blind hole method. After the test plate welding, the stress concentration area was located in the center of the residual height of the weld and the outside of the toe of the GH4169 side, and the maximum equivalent residual stress was 457 MPa. The principal stress direction was longitudinal, and the area near the weld presented an obvious tensile stress state, and a large compressive stress existed in the center of the GH4169 side test plate.

关 键 词：填丝TIG焊 弯曲试验 应力分布状态 

分 类 号：TG444[金属学及工艺—焊接]