退火处理对TC4钛合金航空发动机叶片组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.10.022

金属热处理 ›› 2024, Vol. 49 ›› Issue (10): 126-132.DOI: 10.13251/j.issn.0254-6051.2024.10.022

退火处理对TC4钛合金航空发动机叶片组织与力学性能的影响

王庆娟¹, 杜旭东¹, 蒋立², 李之怡¹, 刘丹², 王伟¹

1.西安建筑科技大学冶金工程学院, 陕西西安 710055;
2.陕西长羽航空装备股份有限公司, 陕西西安 710299

收稿日期:2024-04-29 修回日期:2024-08-08 出版日期:2024-11-28 发布日期:2024-11-28
作者简介:王庆娟(1973—),女,教授,博士,主要研究方向为高强β钛合金、高性能铜合金,E-mail: jiandawqj@163.com
基金资助:
国家自然科学基金(52174371);陕西长羽航空装备股份有限公司项目(20220554)

Effect of annealing on microstructure and mechanical properties of TC4 titanium alloy aeroengine blades

Wang Qingjuan¹, Du Xudong¹, Jiang Li², Li Zhiyi¹, Liu Dan², Wang Wei¹

1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China;
2. Shaanxi Changyu Aviation Equipment Co., Ltd., Xi'an Shaanxi 710299, China

Received:2024-04-29 Revised:2024-08-08 Online:2024-11-28 Published:2024-11-28

摘要/Abstract

摘要： 以航空发动机用TC4合金三级转子叶片为研究对象,对其进行不同温度(600～950 ℃)和不同冷却方式(空冷、水冷)的退火处理,利用OM、SEM以及EBSD对组织进行分析,利用维氏硬度计和拉伸试验机对显微硬度和室温力学性能进行检测,研究退火处理对TC4钛合金叶片组织与力学性能的影响。结果表明,退火温度低于850 ℃时,随退火温度升高,α相体积分数变化不大,α相晶粒尺寸约为12 μm。当退火温度超过850 ℃时,组织中出现了针状α相。当退火温度低于900 ℃时,空冷试样的硬度比水冷高出5~10 HV0.2。当退火温度超过850 ℃后,针状α相含量增加,显微硬度迅速增加。退火温度为600 ℃时,强度最大,伸长率较低;空冷条件下,退火温度为800 ℃时,抗拉强度达到1033.7 MPa,伸长率为23.2%,叶片综合力学性能最优。

关键词: TC4钛合金叶片, 退火处理, 组织, 硬度, 力学性能

Abstract: TC4 alloy third-stage rotor blade for aeroengine was annealed at different temperatures (600-950 ℃) with different cooling methods (air cooling and water cooling). The microstructure was analyzed by OM, SEM and EBSD. The microhardness and mechanical properties at room temperature were tested by Vickers hardness tester and tensile testing machine. The effect of annealing treatment on the microstructure and mechanical properties of the TC4 titanium alloy blades was studied. The results show that the volume fraction of α phase changes little with the increase of annealing temperature below 850 ℃, and the grain size of α phase is about 12 μm. When the annealing temperature exceeds 850 ℃, the acicular α phase appears in the microstructure. When the annealing temperature is below 900 ℃, the hardness of the air-cooled specimen is 5-10 HV0.2 higher than that of the water-cooled specimen. When the annealing temperature exceeds 850 ℃, the content of acicular α phase increases and the microhardness rapidly increases. The maximum strength appears at the annealing temperature of 600 ℃, but with relatively low elongation. Under air cooling conditions, at annealing temperature of 800 ℃, the tensile strength reaches 1033.7 MPa, the elongation is 23.2%, and the comprehensive mechanical properties of the blade are optimal.

Key words: TC4 titanium alloy blade, annealing, microstructure, hardness, mechanical properties

中图分类号:

TG156.2

王庆娟, 杜旭东, 蒋立, 李之怡, 刘丹, 王伟. 退火处理对TC4钛合金航空发动机叶片组织与力学性能的影响[J]. 金属热处理, 2024, 49(10): 126-132.

Wang Qingjuan, Du Xudong, Jiang Li, Li Zhiyi, Liu Dan, Wang Wei. Effect of annealing on microstructure and mechanical properties of TC4 titanium alloy aeroengine blades[J]. Heat Treatment of Metals, 2024, 49(10): 126-132.

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退火处理对TC4钛合金航空发动机叶片组织与力学性能的影响

Effect of annealing on microstructure and mechanical properties of TC4 titanium alloy aeroengine blades

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