延时淬火对航天紧固件用TC4钛合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2023.12.022

金属热处理 ›› 2023, Vol. 48 ›› Issue (12): 135-139.DOI: 10.13251/j.issn.0254-6051.2023.12.022

延时淬火对航天紧固件用TC4钛合金组织和性能的影响

吴晨, 马保飞, 赵耕岑, 李敏娜, 任军帅, 于奎

西北有色金属研究院, 陕西西安 710016

收稿日期:2023-07-09 修回日期:2023-10-25 出版日期:2023-12-25 发布日期:2024-01-29
作者简介:吴晨(1993—),女,工程师,硕士,主要研究方向为钛合金棒材锻造工艺,E-mail:386729645@qq.com

Effect of delayed quenching on microstructure and properties of TC4 titanium alloy for aerospace fasteners

Wu Chen, Ma Baofei, Zhao Gengcen, Li Minna, Ren Junshuai, Yu Kui

Northwest Nonferrous Metals Research Institute, Xi'an Shaanxi 710016, China

Received:2023-07-09 Revised:2023-10-25 Online:2023-12-25 Published:2024-01-29

摘要/Abstract

摘要： 分别对TC4钛合金丝材进行不同时间的延时固溶处理和延时固溶时效处理,检测试样的显微组织、室温拉伸和剪切性能,探究延时淬火对TC4钛合金丝材组织与性能的影响规律。结果表明,随着延时淬火时间的增加,固溶和固溶时效后显微组织中初生α相含量逐渐减少,β_转逐渐增多,晶粒尺寸逐渐增大。相比于固溶处理,固溶时效处理后显微组织中有较高含量的强化相,同时晶粒尺寸也更小;强度和韧性更大,塑性更小。随着延时淬火时间的增加,强度和韧性均呈现减小趋势,塑性均呈现增大趋势。在本试验条件下,延时淬火10 s对强度的削减作用基本等同于时效对强度的增加作用。

关键词: 延时淬火, 紧固件用TC4钛合金, 固溶时效, 显微组织, 力学性能

Abstract: TC4 titanium alloy wire was subjected to delayed solution treatment and delayed solution+aging treatment for different time, and the microstructure, tensile and shear properties of the specimen were tested. The effect of delayed quenching on the microstructure and properties of the TC4 titanium alloy wires was explored. The results show that with the increase of delayed quenching time, the content of primary α phase decreases gradually, β transformation phase increases gradually and grain size increases gradually after solution and solution aging treatment. Compared with solution treatment, there is a higher content of strengthening phase and a smaller grain size in the microstructure after solution aging treatment. Greater strength and toughness, less plasticity. With the increase of delayed quenching time, the strength and toughness values decrease, while the plasticity values increase. Under the experimental conditions, the effect of 10 s-delayed quenching on strength reduction is basically equivalent to the effect of aging treatment on strength increase.

Key words: delayed quenching, TC4 titanium alloy for fasteners, solution treatment and aging, microstructure, mechanical properties

中图分类号:

TG146.2

吴晨, 马保飞, 赵耕岑, 李敏娜, 任军帅, 于奎. 延时淬火对航天紧固件用TC4钛合金组织和性能的影响[J]. 金属热处理, 2023, 48(12): 135-139.

Wu Chen, Ma Baofei, Zhao Gengcen, Li Minna, Ren Junshuai, Yu Kui. Effect of delayed quenching on microstructure and properties of TC4 titanium alloy for aerospace fasteners[J]. Heat Treatment of Metals, 2023, 48(12): 135-139.

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延时淬火对航天紧固件用TC4钛合金组织和性能的影响

Effect of delayed quenching on microstructure and properties of TC4 titanium alloy for aerospace fasteners

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