退火对TC25G钛合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2023.06.013

金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 74-79.DOI: 10.13251/j.issn.0254-6051.2023.06.013

退火对TC25G钛合金组织和性能的影响

王晓巍¹, 董宇², 王德勇¹, 杨立新¹, 李东宽¹, 张安³, 车安达³, 马思琴³

1.航空工业沈阳飞机工业集团有限公司, 辽宁沈阳 110850;
2.空装驻沈阳地区第一军事代表室, 辽宁沈阳 110850;
3.江西景航航空锻铸有限公司, 江西景德镇 333000

收稿日期:2022-12-16 修回日期:2023-05-04 发布日期:2023-08-11
作者简介:王晓巍(1982—),男,高级工程师,主要研究方向为锻铸造工艺及技术管理,E-mail:wangxw010@avic.com

Effect of annealing on microstructure and mechanical properties of TC25G titanium alloy

Wang Xiaowei¹, Dong Yu², Wang Deyong¹, Yang Lixin¹, Li Dongkuan¹, Zhang An³, Che Anda³, Ma Siqin³

1. AVIC Shenyang Aircraft Corporation, Shenyang Liaoning 110850, China;
2. The First Military Representative Office of Air Equipment in Shenyang, Shenyang Liaoning 110850, China;
3. Jiangxi Jinghang Aviation Forging and Casting Co., Ltd., Jingdezhen Jiangxi 333000, China

Received:2022-12-16 Revised:2023-05-04 Published:2023-08-11

摘要/Abstract

摘要： 研究了不同退火处理对TC25G钛合金棒材组织和性能的影响。结果表明, 初生α相的含量对一次退火温度非常敏感, 且随着一次退火温度的升高, 其强度呈缓慢上升趋势, 塑性先升高后降低。随着一次退火保温时间的延长, 初生α相的尺寸有增加的趋势, 同时β转变组织逐渐粗化, 保温时间对其塑性影响较为明显。随着冷却速度的提高, 塑性明显下降, 强度明显升高。二次退火温度对棒材的强度和塑性均有影响, 当二次退火温度超过600 ℃后, 其强度轻微升高而伸长率和断面收缩率明显下降。二次退火温度对TC25G钛合金棒材的冲击性能影响显著, 二次退火温度超过600 ℃时, 与技术条件规定的≥24 J相比, 不能满足要求, 二次退火温度不超过560 ℃时, 试样的冲击性能明显提高, 达到技术要求。

关键词: TC25G钛合金, 退火, 显微组织, 力学性能, 强塑性匹配

Abstract: Effect of different annealing on microstructure and properties of TC25G titanium alloy bars was studied. The results show that the content of primary α phases is very sensitive to the single annealing temperature, and as the single annealing temperature increases, the strength of the alloy increases slowly, and the plasticity increases first and then decreases. With the prolongation of single annealing holding time, the size of primary α phase tends to increase, and the transformation β phase is coarsened gradually, the holding time has a significant impact on plasticity. With the increase of cooling rate, the plasticity decreases obviously and the strength increases obviously. The secondary annealing temperature has an effect on the strength and plasticity of the bar, when the secondary annealing temperature exceeds 600 ℃, the strength increases slightly, while the elongation and reduction of area significantly decrease. The secondary annealing temperature has significant effects on the impact property of the alloy. When the secondary annealing temperature exceeds 600 ℃, the impact property cannot meet the requirements compared to ≥24 J specified in the technical conditions. When the secondary annealing temperature does not exceed 560 ℃, the impact property is significantly improved, meeting the technical requirements.

Key words: TC25G titanium alloy, annealing, microstructure, mechanical properties, strong plastic matching

中图分类号:

TG156.2

王晓巍, 董宇, 王德勇, 杨立新, 李东宽, 张安, 车安达, 马思琴. 退火对TC25G钛合金组织和性能的影响[J]. 金属热处理, 2023, 48(6): 74-79.

Wang Xiaowei, Dong Yu, Wang Deyong, Yang Lixin, Li Dongkuan, Zhang An, Che Anda, Ma Siqin. Effect of annealing on microstructure and mechanical properties of TC25G titanium alloy[J]. Heat Treatment of Metals, 2023, 48(6): 74-79.

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退火对TC25G钛合金组织和性能的影响

Effect of annealing on microstructure and mechanical properties of TC25G titanium alloy

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