复合制造TC25G钛合金构件的组织与力学性能

doi:10.13251/j.issn.0254-6051.2026.02.003

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 16-22.DOI: 10.13251/j.issn.0254-6051.2026.02.003

复合制造TC25G钛合金构件的组织与力学性能

王洋^1,2,3,4, 韩佳兴^1,2, 罗威豪^1,2, 程序^2,3,5, 刘栋^2,5

1.北京航空航天大学材料科学与工程学院, 北京 100191;
2.北京航空航天大学大型金属构件增材制造国家工程实验室, 北京 100191;
3.北京航空航天大学宁波创新研究院, 浙江宁波 315800;
4.中国航空技术国际控股有限公司, 北京 100027;
5.北京航空航天大学前沿科学技术创新研究院, 北京 100191

收稿日期:2025-09-17 修回日期:2025-12-11 发布日期:2026-03-05
通讯作者: 刘栋,副研究员,博士,E-mail:09294@buaa.edu.cn
作者简介:王洋(1988—),男,正高级工程师,硕士,主要研究方向为钛合金增材制造,E-mail:wangy709@163.com。
基金资助:
国家科技重大专项(2019-Ⅶ-0003-0143);国家自然科学基金(52090044)

Microstructure and mechanical properties of hybrid manufactured TC25G titanium alloy component

Wang Yang^1,2,3,4, Han Jiaxing^1,2, Luo Weihao^1,2, Cheng Xu^2,3,5, Liu Dong^2,5

1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. National Engineering Laboratory for Additive Manufacturing of Large Metal Components, Beihang University, Beijing 100191, China;
3. Ningbo Institute of Innovation, Beihang University, Ningbo Zhejiang 315800, China;
4. AVIC International Holding Corporation, Beijing 100027, China;
5. Frontier Science and Technology Innovation Research Institute, Beihang University, Beijing 100191, China

Received:2025-09-17 Revised:2025-12-11 Published:2026-03-05

摘要/Abstract

摘要： 采用激光定向能量沉积+锻造相结合的复合制造技术制备了TC25G钛合金件,并对其进行固溶时效处理,对比研究了沉积态及热处理态TC25G钛合金件的组织和力学性能。结果表明,激光定向能量沉积+锻造复合制造TC25G钛合金件的界面冶金结合良好,无明显缺陷,从热影响区过渡到锻造区,初生α相含量逐渐增加。经固溶时效处理后,锻造基体区与热影响区组织差异性降低,复合制造试样的室温和高温抗拉强度分别提高14.7%和23.3%,断后伸长率分别提高118.2%和318.0%。复合制造TC25G钛合金件的拉伸断裂位置位于锻造基体区,表明结合区并没有成为“弱区”。

关键词: 复合制造, 激光定向能量沉积, 锻造, 组织, 拉伸性能, 硬度

Abstract: TC25G titanium-alloy components were produced by a hybrid manufacture route that coupled laser-directed energy deposition (LDED) with forging, followed by a solution + aging heat treatment. Microstructure and mechanical properties were systematically compared between the as-deposited and heat-treated conditions. The results show that LDED/forging interface exhibits sound metallurgical bonding free of lack-of-fusion or solidification cracks. Moving from the heat-affected zone (HAZ) into the forged substrate, the volume fraction of primary α phase increases progressively. After solution treatment and aging, the difference in microstructure between the forged substrate and the heat-affected zone is reduced, the tensile strength at room temperature and high temperature of the hybrid manufactured specimen increases by 14.7% and 23.3%, respectively, and the elongation after fracture increases by 118.2% and 318.0%, respectively. The tensile fracture positions of the TC25G titanium alloy components are all located in the forged substrate, indicating that the bonding area is not a "weak zone".

Key words: hybrid manufacture, laser-directed energy deposition, forging, microstructure, tensile properties, hardness

中图分类号:

TG146.2⁺3

王洋, 韩佳兴, 罗威豪, 程序, 刘栋. 复合制造TC25G钛合金构件的组织与力学性能[J]. 金属热处理, 2026, 51(2): 16-22.

Wang Yang, Han Jiaxing, Luo Weihao, Cheng Xu, Liu Dong. Microstructure and mechanical properties of hybrid manufactured TC25G titanium alloy component[J]. Heat Treatment of Metals, 2026, 51(2): 16-22.

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复合制造TC25G钛合金构件的组织与力学性能

Microstructure and mechanical properties of hybrid manufactured TC25G titanium alloy component

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