Al-Si-Cu系鋳造合金の凝固組織に及ぼすストロンチウム及びTi-B添加と冷却速度の影響 Effects of Sr, Ti-B and Cooling Rate on Solidification Structures of Al-Si-Cu Cast Alloy

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抄録

  The effects of cooling rate and addition of Sr and Ti-B on microstructural features such as grain size, dendrite arm spacing, morphologies of eutectic silicon and iron rich compound were investigated for the Al-6.55%Si-2.78%Cu-0.59% Fe-0.38% Mg-0.34%Mn alloy (JIS AC4B). This alloy solidifies in the order of primary <i>α</i> (Al) , <i>α</i> + <i>α</i>-AlFeMnSi eutectic, <i>α</i> + Si eutectic, <i>α</i> + <i>β</i>-AlFeMnSi eutectic, <i>α</i> + Si + Mg<sub>2</sub>Si eutectic and <i>α</i> + Si + Al<sub>2</sub>Cu eutectic. The grain size, dendrite arm spacing, size of eutectic silicon particles and length of needle-like iron rich compound decrease as the cooling rate increases, and they are in linear relation on the logarithmic scale. The addition of a small amount of Ti-B markedly refines the grain size while practically unaffects the other solidification structures. At the cooling rates of 2.7K/s, 14.4K/s and 108.1K/s, the eutectic silicon crystals fully modify with the addition of Sr more than 60ppm, 13ppm and 5ppm respectively. The addition of Sr and a higher cooling rate tends to increase the formation of chinese script type iron rich compound.

収録刊行物

  • 鋳造工学 = Journal of Japan Foundry Engineering Society

    鋳造工学 = Journal of Japan Foundry Engineering Society 69(5), 383-390, 1997-05

    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)
    10003800229
  • 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
    4217017
  • 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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