热处理工艺对Ti-55511钛合金微观组织与拉伸性能的影响

doi:10.13251/j.issn.0254-6051.2024.11.028

金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 185-190.DOI: 10.13251/j.issn.0254-6051.2024.11.028

热处理工艺对Ti-55511钛合金微观组织与拉伸性能的影响

翟欣姣¹, 张明玉¹, 宋一新², 岳旭^1,3, 同晓乐¹

1.新疆湘润新材料科技有限公司, 新疆哈密 839000;
2.大连交通大学连续挤压教育部工程研究中心, 辽宁大连 116028;
3.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

收稿日期:2024-05-25 修回日期:2024-09-19 出版日期:2024-11-25 发布日期:2025-01-09
通讯作者: 张明玉,工程师,博士,E-mail:251826123@qq.com
作者简介:翟欣姣(1994—),女,助理工程师,硕士,主要研究方向为钛合金塑性成形,E-mail:251910167@qq.com。
基金资助:
自治区重点研发计划(2022B01029)

Effect of heat treatment process on microstructure and tensile properties of Ti-55511 titanium alloy

Zhai Xinjiao¹, Zhang Mingyu¹, Song Yixin², Yue Xu^1,3, Tong Xiaole¹

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

Received:2024-05-25 Revised:2024-09-19 Online:2024-11-25 Published:2025-01-09

摘要/Abstract

摘要： 对Ti-55511钛合金进行不同工艺的BASCA (β退火+缓慢冷却+时效)处理,并使用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)和电子万能试验机,分析了BASCA工艺对Ti-55511钛合金微观组织与拉伸性能的影响。结果表明,经BASC(β退火+缓慢冷却)工艺处理后,组织中的初生α相尺寸相比合金原始组织中的α相有一定程度的增加,组织中初生α相形貌包括大量条状、少量等轴状以及个别块状。经BASCA工艺处理后,合金中β转变组织明显,组织变得更加均匀稳定。BA(β退火)温度会影响组织中的α相尺寸、形貌以及含量。合金强度随BA温度的升高而升高,而塑性则呈相反趋势。合金经BASC工艺处理后的断口形貌主要以韧窝为主,韧窝形貌较大且深,随BA温度升高,断口中撕裂棱形貌越加明显,并发现经BASCA工艺处理后的断口微观形貌中除韧窝外还存在二次裂纹,且断口呈现出高低起伏的崎岖形貌。

关键词: Ti-55511钛合金, BASCA工艺, 微观组织, 拉伸性能, 断口形貌

Abstract: Effect of BASCA (β annealing+slow cooling+aging) treatment on microstructure and tensile properties of the Ti-55511 titanium alloy was analyzed by means of optical microscope (OM), scanning electron microscope (SEM), X-ray diffractometer (XRD) and electron universal testing machine. The results show that after BASC (β annealing+slow cooling) treatment, the size of the primary α phase in the microstructure increases to a certain extent compared to the α phase in the original microstructure of the alloy. The morphology of the primary α phase in the microstructure includes a large number of strip-shaped, a small amount of equiaxed and a few blocky. After BASCA treatment, the β transformation structure in the alloy is obvious, and the microstructure becomes more uniform and stable. BA (β annealing) temperature affects the size, morphology and content of the α phase in the microstructure. The strength of the alloy increases with the increase of BA temperature, while the plasticity shows the opposite trend. The tensile fracture morphology of the alloy treated by BASC process is mainly dimples, and the dimple is large and deep. With the increase of BA temperature, the tear ridge appearance in the fracture becomes more and more obvious. It is found that there are secondary cracks in the fracture after BASCA treatment, and the fracture presents a rugged morphology with high and low fluctuations.

Key words: Ti-55511 titanium alloy, BASCA process, microstructure, tensile properties, fracture morphology

中图分类号:

TG156.1

翟欣姣, 张明玉, 宋一新, 岳旭, 同晓乐. 热处理工艺对Ti-55511钛合金微观组织与拉伸性能的影响[J]. 金属热处理, 2024, 49(11): 185-190.

Zhai Xinjiao, Zhang Mingyu, Song Yixin, Yue Xu, Tong Xiaole. Effect of heat treatment process on microstructure and tensile properties of Ti-55511 titanium alloy[J]. Heat Treatment of Metals, 2024, 49(11): 185-190.

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热处理工艺对Ti-55511钛合金微观组织与拉伸性能的影响

Effect of heat treatment process on microstructure and tensile properties of Ti-55511 titanium alloy

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