過共晶Al-Si合金中に初晶出する珪素の粒度におよぼすガス処理の影響

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タイトル別名
  • Effect of Gas-treatment on the Structure of Hypereutectic Al-Si Alloys
  • カキョウショウ Al-Si ゴウキン チュウ ニ ハツショウダスル ケイソ ノ リュウド ニ オヨボス ガス ショリ ノ エイキョウ

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抄録

The structure of phosphorus-bearing hypereutectic Al-Si alloys, bubbled by such gases as argon, nitrogen, air, steam, and chlorine, has been observed. Treatment by gas except chlorine promotes the growth of primary silicon crystallite. Among gases mentioned above, the effect of steam on crystallite growth was most conspicuous, even though there exists sufficient amount of phosphorus to retard the growth of primary silicon crystallite. In the alloys with crystallite growth caused by steam-treatment, grain-refinement may fully be observed after chlorine-treatment. The presence of hydrogen in alloy probably inhibits the role of phosphorus that contributes to the grain-refinement of primary silicon crystallite. Gas-treatment and remelting of Al-Si alloys may hardly reduce the content of phosphorus in alloys in the case of lower than 0.01% phosphorus.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 22 (12), 621-624, 1958

    公益社団法人 日本金属学会

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