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王慢慢,杨彦红,王道红,李志海,严红彬,崔传勇.铸造高温合金K417G深度脱氧脱硫的研究[J].稀有金属材料与工程(英文),2018,47(12):3730~3734.[ManMan Wang,YanHong Yang,DaoHong Wang,ZhiHai Li,HongBin Yan and ChuanYong Cui.Deep Deoxidation and Desulfurization of Cast Superalloy K417G[J].Rare Metal Materials and Engineering,2018,47(12):3730~3734.]
Deep Deoxidation and Desulfurization of Cast Superalloy K417G
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Received:April 17, 2017  Revised:May 12, 2017
DOI:
Key words: Cast superalloys  deoxidation  desulfurization  calcium  CaO crucible
Foundation item:国家自然科学基金资助(项目号51671189, 11332010)
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ManMan Wang,YanHong Yang,DaoHong Wang,ZhiHai Li,HongBin Yan and ChuanYong Cui  
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Abstract:
      The effects of metal calcium and CaO crucible on deep deoxidation and desulfurization of cast superalloy K417G were studied by vacuum induction melting.Results showed that Ca can achieve the effect of deep deoxidation and desulfurization, the oxygen content decreased from 0.0013% to 0.0006%, the sulfur content decreased from 0.0007% to 0.0002%.The equilibrium relationship between measured w [Ca] -w [S] in the alloy is basically the same as that of the thermodynamic calculation.In addition, the effect of deoxidation and desulfurization of CaO crucible is obvious, oxygen content can be reduced to 0.0006%, sulfur content can be reduced to less than 0.0002%, the reduction of sulfur content is related to the formation of mCaO.nAl2O3slag in the inner wall of CaO crucible, thus realizing deep desulfurization.