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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 8    No. 1    March 1998

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WATER-COOLING CRUCIBLE VACUUM INDUCTION MELTING OFγ-TiAl BASED ALLOYS
Su Yanqing, Guo Jingjie, Ding Hongsheng, Wang Tongmin, Zhu Hanliang, Jia Jun

School of Materials Science and Engineering,Harbin Institute of Technology, Harbin 150001, P. R. China

Abstract:Water-cooling crucible vacuum induction melting is a good method for melting reactive alloys, the molten metal prepared has a homogenous composition, temperature and degree of superheating. The melting procedure of theγ-TiAl based alloys melted with water-cooling crucible vacuum induction melting furnace was studied and the results showed that the non-uniform composition in the skull determined by the forming processing of the skull and the evaporation of alloying elements with higher vapor pressure results in a composition difference between nominal and analyzing composition. There would be a sedimentation of large density alloying element in the molten metal because of density difference. The problem above mentioned can be solved by controlling the melting parameters and applying master alloy.

 

Key words: γ-TiAl cold crucible induction melting skull

ISSN 1672-7029
CN 43-1423/U

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