りん添加処理した過共晶Ａｌ‐２０％Ｓｉ合金の初晶けい素微細化に対する鋳造温度の影響

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タイトル別名
  • Influence of casting temperature on refinement of primary silicon crystals in a hypereutectic Al-20%Si alloy by phosphorus addition
  • リン テンカ ショリシタ カキョウショウ Al 20パーセント Si ゴウキン

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Effects of casting temperatures, remelting temperatures and repeated melting-casting cycles on refinement of primary silicon in an Al-20%Si alloy treated with red phosphorus were studied by means of an optical microscope and an X-ray microanalyzer. When a melt was cast at 700°C after treated with phosphorus at 700-900°C, primary silicon crystals were not refined. In P-treated end remelted specimens, 5 melting-casting cycles did not influence the microstructural refinement, however remelting in the range of 750-700°C decreased the refinement of primary silicon. Coarse black-colored particles were present in some primary silicon and in the eutectic structure of P-treated specimens cast at 750-700°C or remelted at 750-700°C. These black particles were identified to contain Al and P components by X-ray microanalysis. These results could be explained on the basis that the dispersion of black particle was extremely sensitive to the casting temperature.

収録刊行物

  • 軽金属

    軽金属 26 (6), 273-279, 1976

    一般社団法人 軽金属学会

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