焊后热处理对T92/HR3C异种钢接头组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2023.10.014

金属热处理 ›› 2023, Vol. 48 ›› Issue (10): 102-108.DOI: 10.13251/j.issn.0254-6051.2023.10.014

焊后热处理对T92/HR3C异种钢接头组织和力学性能的影响

靳达¹, 王智春², 韩哲文², 于井会¹, 王启冰³, 康举³

1.国能(天津)大港发电厂有限公司, 天津 300272;
2.华北电力科学研究院有限责任公司, 北京 100045;
3.北京石油化工学院机械工程学院, 北京 102617

收稿日期:2023-05-29 修回日期:2023-08-26 出版日期:2023-10-25 发布日期:2023-12-07
通讯作者: 康举,副教授,博士,E-mail:kangju@bipt.edu.cn
作者简介:靳达(1982—),男,工程师,硕士,主要研究方向为发电厂设备检修与管理,E-mail:17013626@ceic.com。
基金资助:
国家自然科学基金(52175286)

Effect of post-weld heat treatment on microstructure and mechanical properties of T92/HR3C dissimilar metal welded joints

Jin Da¹, Wang Zhichun², Han Zhewen², Yu Jinghui¹, Wang Qibing³, Kang Ju³

1. Guoneng (Tianjin) Dagang Power Plant Co., Ltd., Tianjing 300272, China;
2. North China Electric Power Research Institute Co., Ltd., Beijing 100045, China;
3. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China

Received:2023-05-29 Revised:2023-08-26 Online:2023-10-25 Published:2023-12-07

摘要/Abstract

摘要： 以Inconel 82焊丝为填充金属,采用手工钨极惰性气体保护焊对T92/HR3C异种钢进行焊接,经焊后热处理后,采用光学显微镜、透射电镜对接头各区的微观组织进行表征,并对接头的室温拉伸性能进行测试。结果表明,接头T92钢热影响区(HAZ)由板条马氏体和部分等轴亚晶粒组成,板条晶界上存在连续的M₂₃C₆碳化物,晶内碳化物溶解;HR3C钢HAZ组织表现出较高的热稳定性;焊缝金属由较粗大的奥氏体枝晶和M₂₃C₆碳化物组成,同时存在一定量的位错;接头室温拉伸断裂发生在HR3C钢侧熔合区附近的焊缝,呈现为韧性断裂。

关键词: 异种钢焊接, 焊后热处理, 镍基焊缝, 微观组织, 力学性能

Abstract: T92/HR3C dissimilar steels were welded by manual tungsten inert gas (TIG) welding with Inconel 82 wire as filler metal. After post-weld heat treatment, the microstructure of each region in the joint was characterized by means of metallographic microscope and transmission electron microscope, and the tensile properties of the joint at room temperature were tested. The results show that the heat affected zone (HAZ) on the T92 steel side is composed of lath martensite and some equiaxed sub-grains. Moreover, there are continuous M₂₃C₆ carbides on the lath grain boundary, whereas the carbide in the grain is dissolved. The microstructure of HAZ on the HR3C steel side shows high thermal stability. The weld metal is composed of coarse austenite dendrite and M₂₃C₆ carbide, and there is a certain amount of dislocations. The tensile fracture of the joint occurs in the weld where near the fusion zone on the HR3C steel side, which shows ductile fracture feature.

Key words: dissimilar steel welding, post-weld heat treatment, nickle-based welds, microstructure, mechanical properties

中图分类号:

TG407

靳达, 王智春, 韩哲文, 于井会, 王启冰, 康举. 焊后热处理对T92/HR3C异种钢接头组织和力学性能的影响[J]. 金属热处理, 2023, 48(10): 102-108.

Jin Da, Wang Zhichun, Han Zhewen, Yu Jinghui, Wang Qibing, Kang Ju. Effect of post-weld heat treatment on microstructure and mechanical properties of T92/HR3C dissimilar metal welded joints[J]. Heat Treatment of Metals, 2023, 48(10): 102-108.

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焊后热处理对T92/HR3C异种钢接头组织和力学性能的影响

Effect of post-weld heat treatment on microstructure and mechanical properties of T92/HR3C dissimilar metal welded joints

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