时效对热旋压TC11钛合金组织及性能的影响

doi:10.13251/j.issn.0254-6051.2021.07.024

金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 126-130.DOI: 10.13251/j.issn.0254-6051.2021.07.024

时效对热旋压TC11钛合金组织及性能的影响

白鹭¹, 张小娟¹, 周钟平¹, 倪林彧¹, 周银娣¹, 闵永安²

1.上海航天动力技术研究所, 上海 201109;
2.上海大学材料学院, 上海 200072

收稿日期:2021-02-26 出版日期:2021-07-25 发布日期:2021-12-10
作者简介:白鹭(1994—),女,助理工程师,硕士,主要研究方向为合金材料的热处理,E-mail:bailu@806.sast.casc。

Effect of aging on microstructure and properties of hot-spunTC11 titanium alloy

Bai Lu¹, Zhang Xiaojuan¹, Zhou Zhongping¹, Ni Linyu¹, Zhou Yindi¹ , Min Yong'an²

1. Shanghai Space Propulsion Technology Research Institute, Shanghai 201109, China;
2. Institute of Materials, Shanghai University, Shanghai 200072, China

Received:2021-02-26 Online:2021-07-25 Published:2021-12-10

摘要/Abstract

摘要： 采用光学显微镜、透射电镜、X射线衍射仪、拉伸试验机等研究了时效对双重退火态TC11钛合金原料热旋压成型后的显微组织和力学性能的影响,并确定了最佳的时效温度范围。结果表明,与双重退火态TC11钛合金原料相比,热旋压后的抗拉强度提高了近17%,硬度提高了约8 HRC,再经560 ℃×3 h时效后,抗拉强度由1195 MPa提高至1240 MPa,硬度提升约1 HRC,综合力学性能和硬度得到进一步提高。热旋压和时效均能促进软韧相β相向强化相α相转变。300~600 ℃时效时,抗拉强度均大于1200 MPa,并在580 ℃达到最大为1242 MPa。随着温度的升高,断后伸长率有所下降并在高于580 ℃时降至8%以下。热力学计算结果表明500~560 ℃温度范围内β相向α相的转变倾向最大,在此温度范围内进行时效最为适宜。

关键词: 热旋压, TC11钛合金, 热处理, 力学性能, 强化机理

Abstract: Effect of aging on microstructure and mechanical properties of double annealed TC11 titanium alloy after hot spinning was studied by means of optical microscope, transmission electron microscope, X-ray diffractometer and tensile testing machine, and the optimal aging temperature range was determined. The results show that the tensile strength and hardness of the alloy after hot spinning are increased by 17% and by about 8 HRC compared with those before. After aging at 560 ℃ for 3 h, the tensile strength is increased from 1195 MPa to 1240 MPa, and the hardness is increased by about 1 HRC, the comprehensive mechanical properties and hardness are further improved. Both hot spinning and aging can promote the transition from soft and ductile phase β to strengthening phase α. The tensile strength is all higher than 1200 MPa at 300-600 ℃, and the maximum tensile strength is 1242 MPa at 580 ℃. With the increase of temperature, the elongation decreases continually and becomes less than 8% above 580 ℃. The thermodynamic calculation results show that the transition tendency of β phase to α phase is the greatest in the temperature range of 500-560 ℃, so is the most suitable temperature range of aging.

Key words: hot spinning, TC11 titanium alloy, heat treatment, mechanical properties, strengthening mechanism

中图分类号:

TG156.99

白鹭, 张小娟, 周钟平, 倪林彧, 周银娣, 闵永安. 时效对热旋压TC11钛合金组织及性能的影响[J]. 金属热处理, 2021, 46(7): 126-130.

Bai Lu, Zhang Xiaojuan, Zhou Zhongping, Ni Linyu, Zhou Yindi , Min Yong'an. Effect of aging on microstructure and properties of hot-spunTC11 titanium alloy[J]. Heat Treatment of Metals, 2021, 46(7): 126-130.

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时效对热旋压TC11钛合金组织及性能的影响

Effect of aging on microstructure and properties of hot-spunTC11 titanium alloy

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