2002•The Chinese Journal of Nonferrous MetalsRequires access

Deoxidation during vacuum induction melting of Ni-base superalloy

Niu Jian

Abstract

The deoxidation effect in vacuum induction melting of Ni base superalloy by using CaO crucible was studied. The influence of adding 0.02%C and 0.5%Al on deoxidation was also analyzed. Thermodynamics calculation of the deoxidation reaction in CaO crucible was done. The results show that most oxygen can be removed in melting period. In CaO crucible, adopting proper melting technology and carbon and aluminium addition amounts, oxygen content could be reduced to below 0.000?6%.

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Key concepts: Crucible (geodemography), Vacuum induction melting, Superalloy, Materials science, Metallurgy, Aluminium, Base (topology), Oxygen