Preparation of White Heart Malleable Cast Iron in Na2O-K2O-SiO2 Oxide Molten Salt

DOI Web Site Web Site 参考文献14件
  • Yamamoto Hiroaki
    Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo
  • Shinzaki Kenji
    Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo
  • Morishita Masao
    Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo
  • Koyama Koichiro
    Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo

書誌事項

タイトル別名
  • Preparation of White Heart Malleable Cast Iron in Na<SUB>2</SUB>O-K<SUB>2</SUB>O-SiO<SUB>2</SUB> Oxide Molten Salt

この論文をさがす

抄録

The preparation process of white heart malleable cast iron by heat treatment of white cast iron in Na2O-K2O-SiO2 oxide molten salts at lower temperature than usual production method was studied. The liquidus temperature of the K2O added Na2O-SiO2 (64–36 mol%) system was measured by the hot-thermocouple method and the effect of the treatment temperature on the degree of decarburization of white cast iron was investigated. The result of measuring liquidus temperature indicated that the Na2O-K2O-SiO2 (38.4–40–21.6 mol%) ternary oxide melted at about 893 K. After heat treatments of white cast iron (φ8mm×8mm) containing 3.34 mass% carbon in this oxide molten salt at 1123–1223 K for 72 h, the white heart malleable cast iron could be obtained. Although, the thickness of the surface decarburized layer decreased with the decrease of the treatment temperature, the white heart malleable cast iron having about 30 μm surface layer was obtained even at low temperature of 1123 K. The basicity of this molten salt was 2.53, which was too high to be suitable for the decarburization of white cast iron at 1323 K. It is found that white heart malleable cast iron can be prepared by the heat treatment in high basisity oxide molten salt at lower temperature than 1323 K.

収録刊行物

参考文献 (14)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ