球状黒鉛鋳鉄の凝固形態に及ぼす微量不純物元素の影響 Effects of Trace Elements on Solidification Morphology of Spheroidal Graphite Cast Iron

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  Molten spheroidal graphite cast iron was melted as raw materials using steel can scrap (S.C.S), of which the Al cap portion was removed, and cast into several kinds of molds to examine spheroidal graphite cast iron characteristics (chilling tendency, nodule count, graphite spheroidization), mechanical properties (tensile strength, brinell hardness, elongation) and chemical composition. In this study, a standard sample was first melted, and then samples containing 10, 20, 30, 40, 50, 55, 60, 70% S.C.S. in raw materials were melted. Since it is known that the generation of chill is influenced by the critical nodule count for graphitization/stabilization (P.c. ), chilling tendency was investigated by P.c. rather than the total chill depth.<br>  In this experiment, Sn contents increased with increasing S.C.S. Cr, Ti, and Mn contents also increased, though slightly. The total chill depth increased when the compounding ratio of S.C.S. exceeded 50%. Although the percentage of graphite spheroidization did not change in the specimens, that of pearlite increased with increasing compounding ratio of S.C.S. P.c. increased in samples with 40% and 50% S.C.S., and decreased in samples with 60% and 70% S.C.S.. Moreover, the nodule count reached its maximum when the compounding ratio of S.C.S. was 50% at the same cooling rate (3.5 K/s). Therefore, 50% compounding ratio of S.C.S. is thought to be optimum from the viewpoint of spheroidal graphite nucleation.

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  • 鋳造工学 = Journal of Japan Foundry Engineering Society

    鋳造工学 = Journal of Japan Foundry Engineering Society 76(3), 192-197, 2004-03-25

    公益社団法人 日本鋳造工学会

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各種コード

  • NII論文ID(NAID)
    10013435513
  • NII書誌ID(NCID)
    AN10514770
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13420429
  • NDL 記事登録ID
    6885830
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-277
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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