3种钛合金富氧α层的生长规律

doi:10.13251/j.issn.0254-6051.2023.11.011

金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 68-72.DOI: 10.13251/j.issn.0254-6051.2023.11.011

3种钛合金富氧α层的生长规律

闫文萱, 邵洙浩, 李伟, 刘京, 魏晓艳, 谷国君

中国航发北京航空材料研究院, 北京 100095

收稿日期:2023-06-17 修回日期:2023-09-30 出版日期:2023-11-25 发布日期:2023-12-27
作者简介:闫文萱(1990—),女,工程师,硕士,主要研究方向为金属材料塑性成形,E-mail:17864287700@163.com

Growth law of oxygen-rich α layer of three titanium alloys

Yan Wenxuan, Shao Zhuhao, Li Wei, Liu Jing, Wei Xiaoyan, Gu Guojun

AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China

Received:2023-06-17 Revised:2023-09-30 Online:2023-11-25 Published:2023-12-27

摘要/Abstract

摘要： 分析了3种钛合金(TC2、TC4和TC6合金)在不同热处理条件下富氧α层的生长规律,并计算了生成动力学和热力学。结果表明,富氧α层厚度随加热温度和保温时间的增加而增加,温度是影响富氧α层厚度的主要原因。富氧α层的生长受氧扩散过程影响,富氧α层厚度与t^1/2呈线性关系。TC2、TC4和TC6合金富氧α层的热激活能分别为106.1、110.1、47.7 kJ/mol。由于氧的固溶强化作用,富氧α层显微硬度高于基体硬度,通过显微硬度法测量富氧α层厚度值要高于金相法的测量值。

关键词: 钛合金, 富氧α层, 显微硬度, 热力学激活能

Abstract: Evolution of oxygen-rich α layer of three titanium alloy (TC2, TC4 and TC6 alloys) at various heat treatment conditions was studied. The forming kinetics and thermal activation energy of oxygen-rich α layer were discussed. The results show that the thickness of oxygen-rich α layer increases with the increase of heating temperature and holding time. And heating temperature is main factor. The growth of the oxygen-rich α layer is affected by the oxygen diffusion process, and the thickness is linear with t^1/2. The forming of oxygen-rich α layer belongs to thermal activation behavior, and the layer thermal activation energies of TC2, TC4 and TC6 alloys are 106.1, 110.1 and 47.7 kJ/mol, respectively. Due to the strengthening effect of oxygen, the microhardness of the oxygen-rich α layer is higher than the matrix. The thickness measured by microhardness method is higher than that by metallographic observation method.

Key words: titanium alloy, oxygen-rich α layer, microhardness, thermal activation energy

中图分类号:

TG146.2

闫文萱, 邵洙浩, 李伟, 刘京, 魏晓艳, 谷国君. 3种钛合金富氧α层的生长规律[J]. 金属热处理, 2023, 48(11): 68-72.

Yan Wenxuan, Shao Zhuhao, Li Wei, Liu Jing, Wei Xiaoyan, Gu Guojun. Growth law of oxygen-rich α layer of three titanium alloys[J]. Heat Treatment of Metals, 2023, 48(11): 68-72.

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3种钛合金富氧α层的生长规律

Growth law of oxygen-rich α layer of three titanium alloys

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