热处理对GH4169合金脉冲TIG焊接接头组织和性能的影响  

Effects of Heat Treatment on Microstructure and Mechanical Properties of GH4169 Superalloy Pulse TIG Welding Joint

作　　者：刘拥军[1] 龙田鑫 郭成城 Liu Yongjun;Long Tianxin;Guo Chengcheng(School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《稀有金属材料与工程》2023年第10期3522-3529,共8页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2018YFB1105803)。

摘　　要：采用脉冲TIG焊制备GH4169合金焊接接头,并采用4种热处理工艺对焊接接头进行热处理,对比不同热处理工艺对GH4169合金焊接接头组织和性能的影响。结果表明,焊接接头经过4种热处理工艺后,接头室温和高温抗拉强度均得到提高,接头硬度均显著提高,但热处理后接头塑性显著降低。其中经过1020℃固溶处理+双级时效后的接头焊缝中Laves相发生部分溶解,接头室温和高温抗拉强度提高幅度皆达到最大。Four different heat treatment processes were used for the welding joints of GH4169 superalloy,which were prepared by the pulse TIG welding.The microstructures and mechanical properties of the unheated joint and the joints after heat treatments were studied.The results show that after heat treatment processes,the joints tensile strengths at room temperature and 650℃ high temperature are improved,and the joints hardness are significantly increased,but the joints plasticity are significantly decreased.Among them,after 1020℃ solution treatment+two-stage aging,the Laves phases in the joint weld partially dissolve,and the tensile strengths of the joint at room temperature and high temperature are increased to the maximum.

关 键 词：镍基高温合金GH4169 脉冲TIG焊 热处理工艺 组织性能 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG441.8[金属学及工艺—金属材料]