退火温度对Ti60钛合金激光焊接接头组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.05.021

金属热处理 ›› 2024, Vol. 49 ›› Issue (5): 130-134.DOI: 10.13251/j.issn.0254-6051.2024.05.021

退火温度对Ti60钛合金激光焊接接头组织与力学性能的影响

张增光, 史吉鹏, 王新宇, 刘艳梅, 杨立新, 康冲, 刘刚

沈阳飞机工业集团有限公司, 辽宁沈阳 110034

收稿日期:2023-11-14 修回日期:2024-03-18 出版日期:2024-05-25 发布日期:2024-06-28
通讯作者: 史吉鹏,高级工程师,博士,E-mail:shi_jipeng@126.com
作者简介:张增光(1986—),男,工程师,硕士,主要研究方向为金属热处理,E-mail:zguzhang@126.com。
基金资助:
2023年大型飞机钛合金复杂薄壁件成形制造生产线项目(2023ZY01011)

Effect of annealing temperature on microstructure and mechanical properties of laser welded joint of Ti60 titanium alloy

Zhang Zengguang, Shi Jipeng, Wang Xinyu, Liu Yanmei, Yang Lixin, Kang Chong, Liu Gang

Aviation Industry Shenyang Aircraft Corporation, Shenyang Liaoning 110034, China

Received:2023-11-14 Revised:2024-03-18 Online:2024-05-25 Published:2024-06-28

摘要/Abstract

摘要： 采用激光焊接对Ti60高温钛合金进行对接焊试验,对接头的表面成形状态以及宏观组织形貌进行了观察。对焊接接头在不同温度(600、750及900 ℃)下进行了退火处理,利用金相显微镜、硬度计、X射线残余应力检测仪与拉伸试验机分别对退火后接头的组织、硬度、残余应力以及室温拉伸性能进行了测试分析。结果显示,随着退火温度的升高,Ti60高温钛合金激光焊接接头熔化区的α′针状组织逐渐减少,而热影响区的α′针状组织逐渐增多,母材区的α相逐渐增多。焊接接头的残余应力逐渐降低,当退火温度高于750 ℃后,残余应力基本保持不变。750 ℃退火时焊接接头的拉伸性能最优。随着退火温度的升高,焊接接头熔化区与热影响区硬度逐渐降低,而母材区硬度在900 ℃退火后高于600与750 ℃退火后的。

关键词: Ti60钛合金, 激光焊接, 微观组织, 力学性能

Abstract: Butt welding test for the high temperature titanium alloy Ti60 was carried out by laser welding. The surface forming state and macrostructure morphology of the welded joint were observed. And the laser welded joint was annealed at 600, 750 and 900 ℃, respectively, and the microstructure, hardness, residual stress and tensile properties at room temperature of the welded joint annealed were tested and analyzed by means of metallographic microscope, hardness tester, X-ray residual stress detector and tensile testing machine. The results show that with the increase of annealing temperature, the α′ needle-like structure content in the fusion zone of the laser welded joint of the high temperature titanium alloy Ti60 gradually decreases, while that in the heat affected zone gradually increases, and the α phase content in the base metal zone gradually increases. The residual stress of the welded joint gradually decreases. When the annealing temperature exceeds 750 ℃, the residual stress remains basically unchanged. The tensile properties of the welded joint are optimal after annealing at 750 ℃. As the annealing temperature increases, the hardness of the melted zone and heat affected zone of the welded joint gradually decreases, while the hardness of the base metal zone is higher after annealing at 900 ℃ than that after annealing at 600 ℃ and 750 ℃.

Key words: Ti60 titanium alloy, laser welding, microstructure, mechanical properties

中图分类号:

TG142.1

张增光, 史吉鹏, 王新宇, 刘艳梅, 杨立新, 康冲, 刘刚. 退火温度对Ti60钛合金激光焊接接头组织与力学性能的影响[J]. 金属热处理, 2024, 49(5): 130-134.

Zhang Zengguang, Shi Jipeng, Wang Xinyu, Liu Yanmei, Yang Lixin, Kang Chong, Liu Gang. Effect of annealing temperature on microstructure and mechanical properties of laser welded joint of Ti60 titanium alloy[J]. Heat Treatment of Metals, 2024, 49(5): 130-134.

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退火温度对Ti60钛合金激光焊接接头组织与力学性能的影响

Effect of annealing temperature on microstructure and mechanical properties of laser welded joint of Ti60 titanium alloy

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