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宋玉来.,豆志河.,张廷安,刘燕,牛丽萍.金属热还原法制备钛铝中间合金[J].稀有金属材料与工程(英文),2020,49(3):1015~1019.[Song Yulai.,Dou Zhihe.,Zhang Ting-an,Liu Yan and Niu Liping.Preparation of TiAl Alloy by Metallothermic Reduction[J].Rare Metal Materials and Engineering,2020,49(3):1015~1019.]
Preparation of TiAl Alloy by Metallothermic Reduction
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Received:January 17, 2019  Revised:July 12, 2019
Key words: TiAl intermetallic alloy  heat effect per unit mass  adiabatic temperature  metallothermic reduction
Foundation item:重点基础研发计划(项目编号2017YFB0305401-2);中央直属高校基本业务费(项目编号: N170908001、 N172506009)
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Song Yulai.,Dou Zhihe.,Zhang Ting-an,Liu Yan and Niu Liping  
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      The low cost preparation of TiAl master alloy is an important direction of current research. In this paper, TiO2 as raw material, KClO3 as heating agent, Al as reducing agent and alloying agent, Ca as deep reducing agent were used for the preparation of TiAl master alloy by metallothermic reduction method. The 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 showed that when Ca and Al were used as reducing agents, the adiabatic temperature of the system was 2426 K and 1806 K, respectively. The TiAl master alloy was composed of TiAl, Ti3Al and a small amount of Al2O3 inclusions. The contents of Ti, Al and O in the alloy were 58.36%, 40.19% and 1.41%, respectively.