亜鉛合金のポロシティ生成に及ぼす溶存ガスの影響 Effect of Dissolved Gases on Porosity Formation of Cast Zinc Alloy

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抄録

  Zn-4Al-3Cu-0.05Mg cast alloy is used in mold manufacturing for prototyping, but seldom in mass production due to surface defects. One of its main causes, the effects of dissolved gasses were investigated. The volumetric fraction of porosity in the castings obtained in different gas atmospheres decreased in the following order : oxygen, hydrogen, air, argon. Analysis using galvanic cells based on solid electrolyte and a direct measurement of oxygen potential on solidification indicated that the gas liberated at solidification was not oxygen but hydrogen. The hydrogen content in the molten alloy was also measured by the Telegas measurements and Sievert’s parameter, and it showed a good agreement with that from the volumetric fraction of porosity. It is demonstrated that concentrated hydrogen in front of the fluid-solid interface is one cause of micro-porosity formation.

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(8), 635-642, 1997-08

    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)
    10003800581
  • 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
    4275749
  • 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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