金属热还原法制备钛铝中间合金  

Preparation of TiAl Master Alloy by Metallothermic Reduction

作　　者：宋玉来 豆志河[1] 张廷安[1] 刘燕[1] 牛丽萍[1] Song Yulai;Dou Zhihe;Zhang Ting’an;Liu Yan;Niu Liping(Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819

出　　处：《稀有金属材料与工程》2020年第3期1015-1019,共5页Rare Metal Materials and Engineering

基　　金：重点基础研发计划(2017YFB0305401-2);中央直属高校基本科研业务费(N170908001,N172506009)。

摘　　要：以TiO2为原料,KClO3为发热剂,Al为还原剂和合金化剂,Ca为深度还原剂,通过金属热还原法制备钛铝中间合金,考察了单位质量热效应、造渣剂配比和还原剂加入量及组成对反应过程稳定性、合金成分及收率的关系。研究表明:用Ca和Al作为还原剂时,体系绝热温度分别是2426和1806 K,反应制得的钛铝中间合金由Ti Al、Ti3Al和少量的Al2O3夹杂相组成,化学分析合金中Ti、Al、O质量分数分别为58.36%、40.19%和1.41%。TiAl master alloy was prepared by metallothermic reduction method, using TiO2 as raw material, KClO3 as heating agent, Al as reducing agent and alloying agent, Ca as deep reducing agent. The influence of heat effect per unit mass, the proportion of slag-making agent, the amount and composition of reducing agent on the stability of the reaction process, the composition and yield of alloy were investigated. The results show that when Ca and Al are used as reducing agents, the adiabatic temperature of the system is 2426 and 1806 K, respectively. The Ti Al master alloy is composed of TiAl, Ti3Al and a small amount of Al2O3 inclusions. The contents of Ti, Al and O in the alloy are 58.36 wt%, 40.19 wt% and 1.41 wt%, respectively.

关 键 词：钛铝中间合金 单位质量热效应 绝热温度 金属热还原 

分 类 号：TG146.23[一般工业技术—材料科学与工程]