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。
Evolution of oxygen-richαlayer 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-richαlayer were discussed.The results show that the thickness of oxygen-richαlayer increases with the increase of heating temperature and holding time.And heating temperature is main factor.The growth of the oxygen-richαlayer is affected by the oxygen diffusion process,and the thickness is linear with t ^(1/2).The forming of oxygen-richαlayer 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-richαlayer is higher than the matrix.The thickness measured by microhardness method is higher than that by metallographic observation method.
作者
闫文萱
邵洙浩
李伟
刘京
魏晓艳
谷国君
Yan Wenxuan;Shao Zhuhao;Li Wei;Liu Jing;Wei Xiaoyan;Gu Guojun(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第11期68-72,共5页
Heat Treatment of Metals
关键词
钛合金
富氧α层
显微硬度
热力学激活能
titanium alloy
oxygen-richαlayer
microhardness
thermal activation energy
