焊后热处理对TA2钛板氩弧焊接头显微组织和性能的影响

doi:10.13251/j.issn.0254-6051.2023.11.035

金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 221-224.DOI: 10.13251/j.issn.0254-6051.2023.11.035

焊后热处理对TA2钛板氩弧焊接头显微组织和性能的影响

陈元园^1,2, 冯庆^1,2, 张乐^1,2, 王超^1,2, 李梦媛^1,2, 沈楚^1,2, 王思琦^1,2, 韩坤炎^1,2

1.西安泰金新能科技股份有限公司, 陕西西安 710201;
2.西北有色金属研究院, 陕西西安 710201

收稿日期:2023-05-25 修回日期:2023-08-26 出版日期:2023-11-25 发布日期:2023-12-27
作者简介:陈元园(1995—),男,硕士,主要研究方向为钛、铜等金属焊接和金属材料热处理,E-mail:2308461631@qq.com

Effect of post weld heat treatment on microstructure and properties of TA2 titanium plate argon arc welded joint

Chen Yuanyuan^1,2, Feng Qing^1,2, Zhang Le^1,2, Wang Chao^1,2, Li Mengyuan^1,2, Shen Chu^1,2, Wang Siqi^1,2, Han Kunyan^1,2

1. Xi'an Taijin Xinneng Science and Technology Co., Ltd., Xi'an Shaanxi 710201, China;
2. Northwest Institute for Non-ferrous Metal Research, Xi'an Shaanxi 710201, China

Received:2023-05-25 Revised:2023-08-26 Online:2023-11-25 Published:2023-12-27

摘要/Abstract

摘要： 采用氩弧焊焊接TA2钛板,然后对焊态和焊后热处理后的组织与力学性能进行对比分析。结果表明,TA2钛板氩弧焊接头的焊缝宽度约为6 mm,热影响区宽度约为4 mm;焊缝组织主要由β等轴晶+内部针状α马氏体+少量α′马氏体构成,热影响区组织主要由α板条晶粒构成;焊缝硬度最高为195 HV0.5左右,电阻率比母材高且残余应力最大,横向和纵向残余应力分别达到500 MPa和225 MPa;经550 ℃焊后热处理后,焊缝晶粒尺寸与焊态基本一致,热影响区晶粒显著变小,焊接接头硬度显著增加,电阻率和残余应力都有所降低;经600 ℃焊后热处理后,焊接接头晶粒尺寸、显微硬度、电阻率与焊态基本一致,残余应力显著减小;经650 ℃焊后热处理后,焊接接头晶粒尺寸显著长大,显微硬度和电阻率降低,残余应力显著减小。

关键词: 氩弧焊, 钛合金, 焊后热处理, 显微组织, 力学性能

Abstract: TA2 titanium plate was welded by argon arc welding, and the microstructure and mechanical properties of the as-welded and post weld heat treated joint were compared and analyzed. The results show that the weld zone width of the TA2 titanium plate argon arc welded joint is about 6 mm, and the heat affected zone width is about 4 mm, the microstructure of the weld zone is mainly composed of β equiaxed crystal, internal acicular α martensite and small amount of α′ martensite, and the microstructure of the heat affected zone is mainly composed of α lath grains. The maximum hardness of the weld zone is about 195 HV0.5, the resistivity is higher than that of base metal, and the residual stress is the largest, such as the transverse and longitudinal residual stresses reach 500 MPa and 225 MPa, respectively. When post weld heat treated at 550 ℃, the grain size of the weld zone is basically the same as that of the as-welded ones, the grain size of heat affected zone is significantly smaller, the hardness of welded joint is significantly increased, and the resistivity and residual stress are reduced. When post weld heat treated at 600 ℃, the grain size, hardness and resistivity of the welded joint are basically the same as that of the as-welded ones, and the residual stress is significantly reduced. When post weld heat treated at 650 ℃, the grain size of welded joint grows significantly, while the hardness and resistivity decrease, and the residual stress decreases significantly.

Key words: argon arc welding, titanium alloy, post weld heat treatment, microstructure, mechanical properties

中图分类号:

TG154.4

陈元园, 冯庆, 张乐, 王超, 李梦媛, 沈楚, 王思琦, 韩坤炎. 焊后热处理对TA2钛板氩弧焊接头显微组织和性能的影响[J]. 金属热处理, 2023, 48(11): 221-224.

Chen Yuanyuan, Feng Qing, Zhang Le, Wang Chao, Li Mengyuan, Shen Chu, Wang Siqi, Han Kunyan. Effect of post weld heat treatment on microstructure and properties of TA2 titanium plate argon arc welded joint[J]. Heat Treatment of Metals, 2023, 48(11): 221-224.

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焊后热处理对TA2钛板氩弧焊接头显微组织和性能的影响

Effect of post weld heat treatment on microstructure and properties of TA2 titanium plate argon arc welded joint

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