金属热处理 ›› 2024, Vol. 49 ›› Issue (10): 118-120.DOI: 10.13251/j.issn.0254-6051.2024.10.020

• 工艺研究 • 上一篇    下一篇

一次退火冷却方式对TC25钛合金锻件组织与性能的影响

肖挺, 马斌, 宣航   

  1. 陕西宏远航空锻造有限责任公司, 陕西 三原 713801
  • 收稿日期:2024-04-22 修回日期:2024-08-07 出版日期:2024-11-28 发布日期:2024-11-28
  • 作者简介:肖 挺(1985—),男,高级工程师,主要研究方向为锻造热处理过程控制,E-mail: xiaot016@avic.com

Effect of first annealing cooling method on microstructure and properties of TC25 titanium alloy forgings

Xiao Ting, Ma Bin, Xuan Hang   

  1. Shaanxi Hong Yuan Aviation Forging Co., Ltd., Sanyuan Shaanxi 713801, China
  • Received:2024-04-22 Revised:2024-08-07 Online:2024-11-28 Published:2024-11-28

摘要: 对β相区锻造的TC25钛合金进行(Tβ-40) ℃+540 ℃双重退火处理,研究了一次退火冷却方式(箱冷、空冷、风冷)对TC25钛合金锻件组织和性能的影响。结果表明,不同一次退火冷却方式下,锻件合金组织均为片状α相和转变β相组成的网篮组织。随冷却速率的增大,α相集束尺寸减小,合金强度增大,塑性、冲击性能降低。一次退火冷却方式为空冷时,TC25钛合金锻件具有较好的室温和高温强韧性匹配。

关键词: TC25钛合金, 双重退火, 一次退火冷却方式, 显微组织, 力学性能

Abstract: TC25 titanium alloy forged in the β phase region was subjected to double annealing treatment at (Tβ-40) ℃+540 ℃, and the effect of first annealing cooling methods (box cooling, air cooling, forced air cooling) on the microstructure and properties of the TC25 titanium alloy forgings was studied. The results show that the microstructure of the alloy forgings is basket weave consisting of lamellar α phase and β transformed structure under different first annealing cooling methods. As the cooling rate increases, the size of lamellar α phase reduces, in the meantime the tensile properties improve, but plasticity and impact properties decrease. The TC25 titanium alloy forgings have good room temperature and high temperature strength and toughness matching under air cooling.

Key words: TC25 titanium alloy, double annealing, first annealing cooling method, microstructure, mechanical properties

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