(1.中国科学院 金属研究所, 沈阳 110016;
2.沈阳大学 材料工程系, 沈阳 110044)
摘 要: 研究了在真空感应炉中使用CaO坩埚熔炼镍基高温合金的脱氧效果，分析了加入0.02%C和0.5%Al对脱氧的影响，初步进行了在CaO坩埚中脱氧反应的热力学计算。研究表明：熔化期可以脱除大部分的氧；采用CaO坩埚，选择合适的熔炼工艺及C和Al加入量，可使氧的含量降低到小于0.0006%。
关键字: 镍基高温合金；真空感应熔炼；CaO坩埚；脱氧
induction melting of
Ni-base superalloy
（1.Institute of Metal Research，Chinese Academy of
Sciences，Shenyang 110016, China;
2.Department of Materials Engineering，Shenyang
University，Shenyang 110044, China）
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 0.0006%.
Key words: Ni-base superalloy；vacuum induction melting；CaO crucible；deoxidation
