金属热处理 ›› 2022, Vol. 47 ›› Issue (11): 91-94.DOI: 10.13251/j.issn.0254-6051.2022.11.015

• 工艺研究 • 上一篇    下一篇

多次重复固溶时效处理对TB15钛合金组织和力学性能的影响

赵安安, 胡生双, 陈素明, 张颖云, 赵虎, 张颖   

  1. 中航西安飞机工业集团股份有限公司, 陕西 西安 710089
  • 收稿日期:2022-05-20 修回日期:2022-07-27 出版日期:2022-11-25 发布日期:2023-01-04
  • 通讯作者: 胡生双,高级工程师,E-mail:hushengshuang2000@163.com
  • 作者简介:赵安安(1983—),男,研究员级高级工程师,主要研究方向为航空制造工艺,E-mail:swuoip@163.com。

Effect of multiple repeated solution and aging treatment on microstructure and mechanical properties of TB15 titanium alloy

Zhao An'an, Hu Shengshuang, Chen Suming, Zhang Yingyun, Zhao Hu, Zhang Ying   

  1. AVIC Xi'an Aircraft Industry Group Company Co., Ltd., Xi'an Shaanxi 710089, China
  • Received:2022-05-20 Revised:2022-07-27 Online:2022-11-25 Published:2023-01-04

摘要: 利用光学显微镜、拉伸试验机和扫描电镜等手段研究了多次重复固溶时效处理对TB15钛合金显微组织和力学性能的影响。结果表明,随着固溶时效处理重复次数的增加,TB15钛合金的显微组织发生了较为明显的变化,次生α相合并长大,原始β晶粒晶界增厚;1次固溶时效处理后合金的综合力学性能达到最优,随着固溶时效处理重复次数的增加,合金的强度和断裂韧度均降低,伸长率和断面收缩率也急剧降低,断裂类型从韧性断裂向脆性断裂转变;相同工艺参数的重复固溶时效处理不能实现在不大幅降低强度和断裂韧度的前提下改善该合金的室温塑性。

关键词: 多次重复热处理, TB15钛合金, 力学性能, 组织

Abstract: Effect of multiple repeated solution and aging treatment on microstructure and mechanical properties of TB15 titanium alloy was studied by means of optical microscope, tensile testing machine and scanning electron microscope. The results show that with the increase of the repeating time of solution and aging treatment, the microstructure of the TB15 titanium alloy changes obviously, the secondary α phase merges and grows, and the original β grain boundary thickens. The mechanical properties of the alloy after one time solution and aging treatment is the best, however, with the increase of repeating time, the strength and fracture toughness of the alloy decrease, the elongation and reduction of area also decrease sharply, and the tensile fracture changes from ductile fracture to brittle fracture. In conclusion, multiple repeated solution and aging treatment with the same process parameters cannot improve the room temperature ductility of the alloy without drastically reducing the strength and fracture toughness.

Key words: multiple repeated heat treatment, TB15 titanium alloy, mechanical properties, microstructure

中图分类号: