热处理工艺对亚稳定β型钛合金组织与拉伸性能的影响

doi:10.13251/j.issn.0254-6051.2023.07.032

金属热处理 ›› 2023, Vol. 48 ›› Issue (7): 187-192.DOI: 10.13251/j.issn.0254-6051.2023.07.032

热处理工艺对亚稳定β型钛合金组织与拉伸性能的影响

岳旭^1,2, 张明玉³, 杨嘉珞¹, 同晓乐¹, 赵子博², 乔恩利¹, 张起¹, 叶红川¹

1.新疆湘润新材料科技有限公司, 新疆哈密 839000;
2.中国科学院金属研究所师昌绪先进材料创新中心, 辽宁沈阳 110016;
3.大连交通大学连续挤压教育部工程研究中心, 辽宁大连 116028

收稿日期:2022-08-18 修回日期:2023-04-25 出版日期:2023-07-25 发布日期:2023-09-04
作者简介:岳旭(1985—),男,高级工程师,硕士,主要研究方向为钛合金塑性成形,E-mail: xyue22b@imr.ac.cn。
基金资助:
自治区重点研发任务专项(2022B01029);自治区创新环境(人才、基地)建设专项(XJQY2009)

Effect of heat treatment process on microstructure and tensile properties of metastable β-type titanium alloy

Yue Xu^1,2, Zhang Mingyu³, Yang Jialuo¹, Tong Xiaole¹, Zhao Zibo², Qiao Enli¹, Zhang Qi¹, Ye Hongchuan¹

1. Xinjiang Xiangrun New Materials Technology Co., Ltd., Hami Xinjiang 839000, China;
2. Shi Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang Liaoning 110016, China;
3. Engineering Research Center of Continuous Extrusion, Dalian Jiaotong University, Dalian Liaoning 116028, China

Received:2022-08-18 Revised:2023-04-25 Online:2023-07-25 Published:2023-09-04

摘要/Abstract

摘要： 对新型Ti-Al-Mo-V-Cr-Fe系亚稳定β型钛合金进行不同工艺热处理,随后进行室温拉伸性能检测,并用扫描电镜(SEM)和X射线衍射仪(XRD)对不同热处理工艺下合金的显微组织和相组成进行分析。结果表明,合金在α+β两相区温度750 ℃单次退火后的组织中存在大量等轴状α相,在β单相区温度820 ℃单次退火后的组织由粗大的β晶粒组成。合金经单次退火后的合金强度较低而塑性较高,此时断口形貌中韧窝数量较多;再经750 ℃×1 h+540 ℃×8 h和820 ℃×1 h+540 ℃×8 h双重退火后的显微组织中均析出大量的次生α相,合金强度明显升高,而塑性较低,断口形貌中出现明显二次裂纹。

关键词: 亚稳定β型钛合金, 微观组织, 拉伸性能, 断口形貌

Abstract: A new type of Ti-Al-Mo-V-Cr-Fe metastable β-type titanium alloy was heat treated with different processes, and then the tensile properties at room temperature were tested. The microstructure and phase composition of the alloy under different heat treatment processes were analyzed by means of scanning electron microscopse (SEM) and X-ray diffractometer (XRD). The results show that when single annealing at 750 ℃ in the α + β two-phase temperature region, the alloy contains a large number of equiaxed α phases; when single annealing at 820 ℃ in the β single-phase temperature region, the microstructure is composed of coarse β grains. After single annealing, the alloy has low strength and high plasticity, and the quantity of dimples in the fracture morphologies is large. After double annealing at 750 ℃×1 h+540 ℃×8 h or 820 ℃×1 h+540 ℃×8 h, the secondary α phase is precipitated in a large number, the strength of the alloy increases significantly, but the plasticity is low, and obvious secondary cracks appear in the fracture morphologies.

Key words: metastable β-type titanium alloy, microstructure, tensile properties, fracture morphology

中图分类号:

TG156.1

岳旭, 张明玉, 杨嘉珞, 同晓乐, 赵子博, 乔恩利, 张起, 叶红川. 热处理工艺对亚稳定β型钛合金组织与拉伸性能的影响[J]. 金属热处理, 2023, 48(7): 187-192.

Yue Xu, Zhang Mingyu, Yang Jialuo, Tong Xiaole, Zhao Zibo, Qiao Enli, Zhang Qi, Ye Hongchuan. Effect of heat treatment process on microstructure and tensile properties of metastable β-type titanium alloy[J]. Heat Treatment of Metals, 2023, 48(7): 187-192.

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热处理工艺对亚稳定β型钛合金组织与拉伸性能的影响

Effect of heat treatment process on microstructure and tensile properties of metastable β-type titanium alloy

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