模拟烧伤温度对TC4-DT钛合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2021.09.036

金属热处理 ›› 2021, Vol. 46 ›› Issue (9): 199-204.DOI: 10.13251/j.issn.0254-6051.2021.09.036

模拟烧伤温度对TC4-DT钛合金组织与性能的影响

侯瑾睿¹, 张爽², 张毅^1,3, 张凌峰^1,3

1.河南科技大学材料科学与工程学院, 河南洛阳 471023;
2.空军工程大学航空机务士官学校, 河南信阳 464000;
3.有色金属共性技术河南省协同创新中心, 河南洛阳 471023

收稿日期:2021-04-17 出版日期:2021-09-25 发布日期:2021-12-09
通讯作者: 张凌峰,教授,博士,E-mail:zh_lingfeng@163.com
作者简介:侯瑾睿(2001—),女,本科,主要研究方向为有色金属材料的热处理工艺,E-mail:2247387814@qq.com。
基金资助:
国家自然科学基金(U1804146, 51801054)

Effect of simulative burn temperature on microstructure and properties of TC4-DT titanium alloy

Hou Jinrui¹, Zhang Shuang², Zhang Yi^1,3, Zhang Lingfeng^1,3

1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang Henan 471023, China;
2. Aviation Maintenance Sergeant School of Air Force Engineering University, Xinyang Henan 464000, China;
3. Henan Collaborative Innovation Center for Nonferrous Metals, Luoyang Henan 471023, China

Received:2021-04-17 Online:2021-09-25 Published:2021-12-09

摘要/Abstract

摘要： 采用光学显微镜(OM)、透射电镜(TEM)、显微硬度计和万能拉伸试验机等方法研究了飞机用TC4-DT钛合金材料在4种模拟烧伤温度(850、950、1050、1150 ℃)下的组织、强度、硬度和电阻的变化情况,并给出了快速烧伤检测的方法。结果表明:当模拟烧伤温度为850 ℃时,合金等轴组织主要由α相+少量β相组成,随着模拟烧伤温度改变为950 ℃时,等轴状组织发生粗化。当模拟烧伤温度为1050 ℃时,晶粒尺寸明显增大,组织逐渐变成片层状,并伴随着初生α相的减少、β相的增多以及次生α相的析出。且随着模拟烧伤温度改变为1150 ℃时,片层组织继续粗化。烧伤程度与合金的电阻、强度和硬度存在一定的线性关系,随着模拟烧伤温度的升高,材料的方阻值单调递增,抗拉强度随之递减,硬度值先降低后升高,故通过测量方阻的方法可以快速确定材料的烧伤程度。

关键词: TC4-DT钛合金, 烧伤处理, 显微组织, 方阻, 抗拉强度

Abstract: The changes of microstructure, strength, hardness and sheet resistance of TC4-DT titanium alloy after burned at four simulative temperatures (850, 950, 1050 and 1150 ℃) were studied by using optical microscope (OM), transmission electron microscope (TEM), microhardness tester and universal tensile testing machine, and a rapid method for burn detection was given. The results show that when the simulative burn temperature is 850 ℃, the alloy equiaxed structure is composed of α phase and a small amount of β phase, and the equiaxed structure will be coarsened with the increase of temperature to 950 ℃. When the simulative burn temperature is 1050 ℃, the grain size increases remarkably and the structure gradually becomes lamellar, with the decrease of primary α phase, the increase of β phase and the precipitation of secondary α phase. With the change of simulative burn temperature to 1150 ℃, the lamella structure will continue to be coarsened. The degree of burn is related to the resistance, strength and hardness of the alloy. With the increase of simulative burn temperature, the sheet resistance increases monotonously, the strength decreases, and the hardness first decreases and then increases. Therefore, the burn degree of titanium alloy can be determined by measuring the sheet resistance.

Key words: TC4-DT titanium alloy, burn treatment, microstructure, sheet resistance, tensile strength

中图分类号:

TG146.2

侯瑾睿, 张爽, 张毅, 张凌峰. 模拟烧伤温度对TC4-DT钛合金组织与性能的影响[J]. 金属热处理, 2021, 46(9): 199-204.

Hou Jinrui, Zhang Shuang, Zhang Yi, Zhang Lingfeng. Effect of simulative burn temperature on microstructure and properties of TC4-DT titanium alloy[J]. Heat Treatment of Metals, 2021, 46(9): 199-204.

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模拟烧伤温度对TC4-DT钛合金组织与性能的影响

Effect of simulative burn temperature on microstructure and properties of TC4-DT titanium alloy

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