T字形状AC4C合金鋳物の鋳造割れに及ぼす鋳造方案の影響

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タイトル別名
  • Effects of Mold Design on Hot Tearing of JIS AC4C Alloy T- Shape Castings
  • T ジケイジョウ AC4C ゴウキン イモノ ノ チュウゾウ ワレ ニ オヨボス チュウゾウカタアン ノ エイキョウ

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説明

<p>  Four T-shape AC4C alloy castings (a : T without runner, b : T with runner, c : Inverted T without runner, d : Inverted T with runner) were investigated to reveal the effects of sand casting plan on hot-tearing. Linear defect occurred only at the intersection area of the horizontal bar and vertical bar of type b. Microstructure observation, cooling curve analysis, and defect analysis revealed that hot tearing causes the linear defect. The defect was found to occur only when the casting and mold met the following conditions : a) The vertical bar of the T shape locates downward ; b) The solidification rate of the vertical bar of the T shape is slower than that of the horizontal bar ; c) The intersection area of the T shape passes through the eutectic solidification range with a similar cooling rate of the vertical bar, but the area finally cools down before the vertical bar does.</p>

収録刊行物

  • 鋳造工学

    鋳造工学 87 (8), 531-537, 2015

    公益社団法人 日本鋳造工学会

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