Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第31卷    第1期    总第262期    2021年1月

[PDF全文下载]        

    

文章编号:1004-0609(2021)-01-0057-07
α钛富氧层增厚动力学模型
崔 岩1,张志波2,陈玉东3,孙新军3

(1. 华北理工大学 冶金与能源学院,唐山 063210;
2. 昆明理工大学 冶金与能源工程学院,昆明 650093;
3. 钢铁研究总院工程用钢研究所,北京 100081
)

摘 要: 为了实现在工业化生产中对α钛富氧层厚度预测和控制,通过实验研究α钛富氧层在高温空气环境中的形成及增厚过程,讨论热处理温度和时间的影响作用,建立高温(750~850 ℃)空气环境下关于温度、时间的富氧层增厚动力学模型。结果表明:当恒温热处理温度为750~850 ℃时,α钛富氧层厚度x与保温时间t0.5呈正比例关系,且升高热处理温度可显著提高富氧层增厚速度。在此温度范围内,氧原子的扩散激活能约为203473 J/mol,计算曲线与实验数据吻合性较好。结合文献中已有的扩散系数方程和实验测得的富氧层厚度数据,推导得到5个富氧层增厚动力学方程,其中3个方程的计算曲线与实验数据吻合性较好,可为实际生产中预估富氧层厚度提供理论支持。

 

关键字: α钛;富氧层;氧原子;扩散;动力学计算

Kinetic model for thickening of α-titanium rich oxygen layer
CUI Yan1, ZHANG Zhi-bo2, CHEN Yu-dong3, SUN Xin-jun3

1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China;
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
3 Institute of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China

Abstract:In order to predict and control the thickness of oxygen rich layer of α-titanium in industrial production, the formation and thickening processes of oxygen rich layer of α-titanium in high temperature air environment were studied by experiments. The effects of heat treatment temperature and time on the thickness of oxygen rich layer were discussed, and a kinetic model for the thickening of α-titanium rich oxygen layer at high temperature (750-850 ℃) was established. The results show that when the constant temperature is 750-850 ℃, the thickness of oxygen rich layer x and holding time t0.5 of α-titanium plate increase linearly, and the increase of heat treatment temperature can significantly increase the thickening rate of oxygen rich layer. In this temperature range, the diffusion activation energy of oxygen atom is about 203473 J/mol, and the calculated curves are in good agreement with the experimental data. Based on the existing diffusion coefficient equation in the literature and the thicknesses of the oxygen rich layer measured by the experiments, five dynamic equations of oxygen rich layer thickening are derived, three of which are in good agreement with the experimental data and can be used to predict the thickness of oxygen rich layer.

 

Key words: α-Ti; oxygen rich layer; oxygen atom; diffusion; dynamic calculation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com