鋳鉄における共晶凝固温度の変化と溶湯性状の関係  [in Japanese] Relationship between Variation of Eutectic Temperature and Melt Quality in Cast Iron  [in Japanese]

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Author(s)

Abstract

  Using a thermal analysis system consisting of three cups (First : Inoculated, Second : Base melt, Third : Te added) , the effects of alloying elements on graphite eutectic temperature and cementite eutectic temperature of cast iron and their differences (Δ<i>T<sub>E</sub></i>)were investigated. This thermal analysis system was used to predict the chill depth and mechanical properties.<br>  The order of elements (graphitization elements) that expand Δ<i>T<sub>E</sub></i> is as follows : Si > Al > C<sub>CE<3.5%</sub>> Cu > Co > P> Ni > C<sub>CE≧3.5%</sub>. The order of elements (chilling elements) that narrow Δ<i>T<sub>E</sub></i> is as follows : B> S<sub>≧0.45%</sub>>V> Cr> S<sub><0.45%</sub>> Mn> Nb> Ti> Sn> W> Mo> Sb. Δ<i>T<sub>E</sub></i> is related to the distribution coefficient of elements between cementite and austenite. When S and Mn coexist, the eutectic temperature and graphite shape are determined by soluble S and soluble Mn. The chill depth can be determined by eutectic graphitization ability (Δ<i>T<sub>1</sub></i>/Δ<i>T<sub>E</sub></i>). There is a good relationship between Δ<i>T<sub>1</sub></i>/Δ<i>T<sub>E</sub></i> and graphite type and tensile strength. We can conclude that Δ<i>T<sub>1</sub></i>/Δ<i>T<sub>E</sub></i> serves as an efficient method for predicting melt quality in cast iron.

Journal

  • Journal of Japan Foundry Engineering Society

    Journal of Japan Foundry Engineering Society 74(5), 305-311, 2002-05-25

    Japan Foundry Engineering Society

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Codes

  • NII Article ID (NAID)
    10008560348
  • NII NACSIS-CAT ID (NCID)
    AN10514770
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13420429
  • NDL Article ID
    6167282
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-277
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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