激光沉积修复钛合金热影响区异质结构及后续热处理的性能

doi:10.13229/j.cnki.jdxbgxb.20231006

吉林大学学报(工学版) ›› 2025, Vol. 55 ›› Issue (6): 1931-1939.doi: 10.13229/j.cnki.jdxbgxb.20231006

激光沉积修复钛合金热影响区异质结构及后续热处理的性能

安金岚¹(),王澜斌²,周松^2,³(),黄研清¹

^1.沈阳航空航天大学航空制造工艺数字化国防重点学科实验室，沈阳 110136
^2.沈阳航空航天大学机电工程学院，沈阳 110136
^3.沈阳飞机设计研究所，沈阳 110035

收稿日期:2023-09-16 出版日期:2025-06-01 发布日期:2025-07-23
通讯作者: 周松 E-mail:845423087@qq.com;zhousong23@163.com
作者简介:安金岚（1989-），女，讲师，博士.研究方向：航空材料与结构强度.E-mail：845423087@qq.com
基金资助:
国家自然科学基金项目(52105157);中国博士后科学基金项目(2023MD734242)

Microstructure of titanium alloy heat affected zone repaired by laser deposition and properties of subsequent heat treatment

Jin-lan AN¹(),Lan-bin WANG²,Song ZHOU^2,³(),Yan-qing HUANG¹

^1.Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process，Shenyang Aerospace University，Shenyang 110136，China
^2.School of Mechatronics Engineering，Shenyang Aerospace University，Shenyang 110136，China
^3.Shenyang Aircraft Design and Research Institute，Shenyang 110035，China

Received:2023-09-16 Online:2025-06-01 Published:2025-07-23
Contact: Song ZHOU E-mail:845423087@qq.com;zhousong23@163.com

摘要/Abstract

摘要：

针对钛合金零件性能良好但材料利用率较低和在恶劣环境中易出现损坏的特点，采用激光沉积修复技术对其进行快速修复。研究了不同热处理对激光沉积修复钛合金（Ti-6.5Al-2Zr-1Mo-1V）显微组织及力学性能的影响，结果表明，锻造区为双态组织，激光修复区为网篮组织，热影响区呈现异质结构，底部热影响区形成了Ghost α相，顶部热影响区形成了大量的块状β相；拉伸试验表明其力学性能整体上呈现高强度低塑性，且均为韧性断裂，920 ℃/1 h的热处理方式获得了强度与塑性的良好匹配。通过数字化图像处理技术分析发现激光修复区决定了整体试样的综合性能，更薄的α片层和β基体中析出的短棒状α相有助于提高其力学性能。

关键词: 激光沉积修复技术, 力学性能, 钛合金, 数字化图像处理技术

Abstract:

In view of the characteristics of titanium alloy parts with good performance but low material utilization rate and damage in harsh environments， laser deposition repair technology was used to quickly repair them. The effects of different heat treatments on the microstructure and mechanical properties of titanium alloy（Ti-6.5Al-2Zr-1Mo-1V） repaired by laser deposition were studied. The results show that the forging zone has a bi-modal microstructure， the laser repair zone has a basketweave microstructure， the Ghost α phase was formed in the bottom heat-affected zone， and a large number of massive β phases were formed in the top heat-affected zone. Tensile tests show that its mechanical properties were generally high strength and low plasticity， and were all ductile fractures. The heat treatment method of 920 ℃/1 h achieves a good match between strengthand plasticity. Through Digital image processing technology analysis， it was found that the laser repair zone determines the overall performance of the entire sample， and the thinner lamellar α and the short rod-shaped α phase precipitated in the β matrix help to improve the mechanical properties.

Key words: laser deposition repair technology, mechanical properties, titanium alloys, digital image processing technology

中图分类号:

TG405

安金岚,王澜斌,周松,黄研清. 激光沉积修复钛合金热影响区异质结构及后续热处理的性能[J]. 吉林大学学报(工学版), 2025, 55(6): 1931-1939.

Jin-lan AN,Lan-bin WANG,Song ZHOU,Yan-qing HUANG. Microstructure of titanium alloy heat affected zone repaired by laser deposition and properties of subsequent heat treatment[J]. Journal of Jilin University(Engineering and Technology Edition), 2025, 55(6): 1931-1939.

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参数	数值
激光功率/W	3 000±200
扫描间距/mm	3
扫描速度/（mm·min^-1）	1 000±100
送粉速度/（rad·min^-1）	2~2.8
分层厚度/mm	0.9

激光沉积修复钛合金热影响区异质结构及后续热处理的性能

Microstructure of titanium alloy heat affected zone repaired by laser deposition and properties of subsequent heat treatment

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