脉冲电流冲击处理对TC11钛合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2020.12.006

金属热处理 ›› 2020, Vol. 45 ›› Issue (12): 29-35.DOI: 10.13251/j.issn.0254-6051.2020.12.006

脉冲电流冲击处理对TC11钛合金组织与性能的影响

王中奇^1,2, 宋燕利^1,2, 华林^1,2, 余永情^1,2

1.武汉理工大学现代汽车零部件技术湖北省重点实验室, 湖北武汉 430070;
2.武汉理工大学汽车零部件技术湖北省协同创新中心, 湖北武汉 430070

收稿日期:2020-07-20 出版日期:2020-12-25 发布日期:2021-01-14
通讯作者: 宋燕利,教授,E-mail:ylsong@whut.edu.cn
作者简介:王中奇(1995—),男,硕士研究生,主要研究方向为钛合金电磁冲击处理强化,E-mail:13147193626@163.com。
基金资助:
国家自然科学基金(51975441); 教育部创新团队发展计划“先进汽车零部件技术”(IRT17R83); 湖北省技术创新专项(2019AAA014)

Effect of electropulse shocking treatment on microstructure and properties of TC11 titanium alloy

Wang Zhongqi^1,2, Song Yanli^1,2, Hua Lin^1,2, Yu Yongqing^1,2

1. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology,Wuhan Hubei 430070, China;
2. Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology, Wuhan Hubei 430070, China

Received:2020-07-20 Online:2020-12-25 Published:2021-01-14

摘要/Abstract

摘要： 利用光学显微镜、扫描电镜、X射线衍射仪、万能材料试验机和显微硬度计等研究了脉冲电流冲击处理(EST)对TC11钛合金微观组织和力学性能的影响。结果表明:不同脉冲数对TC11钛合金微观组织中α相的比例、β转变组织的板条尺寸和残余压应力大小影响明显,随EST脉冲数的提升,α相含量及板条状β转变组织中次生α相含量呈现先增加后减少的趋势。经最佳工艺参数(900 A、50 Hz、25个脉冲)脉冲电流冲击处理后,TC11钛合金中α相细小均匀,β转变组织板条长度、厚度和间距较处理前试样分别减小了51.9%、58.0%和36.8%,此时合金力学性能提升最为明显:伸长率提高了12.7%,显微硬度增加了4.7%,残余压应力增加48.4%。

关键词: 脉冲电流冲击, TC11钛合金, 显微组织, 力学性能

Abstract: Effect of electropulse shocking treatment(EST) on microstructure and mechanical properties of TC11 titanium alloy was studied by means of metallographic microscope, scanning electron microscope, X-ray diffractometer, universal material testing machine and microhardness tester. The results show that the ratio of α phase in the microstructure of TC11 titanium alloy, the lath size of β transformation structure and residual compressive stress are significantly affected by different pulse numbers. With the increase of EST pulse number, the content of α phase and the content of secondary α phase in lath like β transformation structure increase firstly and then decrease. After treated by the ETC with the best process parameters (900 A, 50 Hz, 25 pulses), the α phase in the TC11 titanium alloy is fine and uniform, and the length, thickness and spacing of β transformation lath are reduced by 51.9%, 58.0% and 36.8%, respectively, compared with those before treatment. At this time, the mechanical properties of TC11 titanium alloy are improved most obviously: elongation increased by 12.7%, microhardness increased by 4.7%, and residual compressive stress increased by 48.4%.

Key words: electropulse-shocking, TC11 titanium alloy, microstructure, mechanical properties

中图分类号:

TG166.5

王中奇, 宋燕利, 华林, 余永情. 脉冲电流冲击处理对TC11钛合金组织与性能的影响[J]. 金属热处理, 2020, 45(12): 29-35.

Wang Zhongqi, Song Yanli, Hua Lin, Yu Yongqing. Effect of electropulse shocking treatment on microstructure and properties of TC11 titanium alloy[J]. Heat Treatment of Metals, 2020, 45(12): 29-35.

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脉冲电流冲击处理对TC11钛合金组织与性能的影响

Effect of electropulse shocking treatment on microstructure and properties of TC11 titanium alloy

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