金属热处理 ›› 2021, Vol. 46 ›› Issue (9): 116-119.DOI: 10.13251/j.issn.0254-6051.2021.09.019

• 工艺研究 • 上一篇    下一篇

高强韧TB8钛合金的热处理制度

李敏娜, 马保飞, 郭金明, 吴晨, 肖松涛   

  1. 西北有色金属研究院, 陕西 西安 710016
  • 收稿日期:2021-04-07 出版日期:2021-09-25 发布日期:2021-12-09
  • 作者简介:李敏娜(1992—),女,工程师,硕士,主要研究方向为稀有金属材料,E-mail:limna03@163.com

Heat treatment of TB8 titanium alloy with high strength and toughness

Li Minna, Ma Baofei, Guo Jinming, Wu Chen, Xiao Songtao   

  1. Northwest Institute for Nonferrous Metal Research, Xi'an Shaanxi 710016, China
  • Received:2021-04-07 Online:2021-09-25 Published:2021-12-09

摘要: 研究了不同固溶时效热处理制度对TB8钛合金棒材组织及性能的影响规律。结果表明,TB8钛合金棒材在890 ℃固溶热处理后可以得到单一等轴β组织,随着保温时间的延长,强度逐渐降低。经520 ℃不同时间时效处理后,β晶粒中析出大量次生α相,使得棒材强度显著增加。当时效保温时间为8 h时,TB8钛合金棒材时效强度达1286 MPa,并保留较好的塑性。推荐TB8钛合金棒材的固溶时效热处理制度为:890 ℃×30 min,WQ+520 ℃×8 h,AC。

关键词: TB8钛合金, 高强韧, 固溶时效, 组织性能

Abstract: Effects of solution treatment and aging process on microstructure and properties of TB8 titanium alloy bars were studied. The results show that single equiaxed β grain of the alloy is obtained after 890 ℃ solution treatment. With solution time increasing, the strength reduces gradually. After aging at 520 ℃ for different time, a large number of secondary α phases are precipitated in β grains, which increases the aging strength of the bar. When aging for 8 h, the strength of the alloy reaches 1286 MPa and good plasticity is retained. The recommended solution treatment and aging system of the TB8 titanium alloy bar is 890 ℃×30 min, WQ+520 ℃×8 h, AC.

Key words: TB8 titanium alloy, high strength and toughness, solution and aging, microstructure and properties

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