CO_2レーザ溶解によるAl-Si合金鋳造材の表面改質 Surface treatments of Al-Si alloy castings by CO_2 laser melting

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Laser surface treatments of Al–Si casting alloys were carried out by CO<sub>2</sub> laser. Laser surface melting was attempted to obtain surface layers with micro-crystalline structure. And further, laser surface alloying was carried out using silicon powder and cobalt base self-fluxing alloy powder as sources of alloying elements. JIS AC3A aluminum alloy and hypereutectic Al–24%Si alloy were used in this experiments. Multi-mode continuous wave beam was adopted. Laser irradiation was carried out in argon atmosphere in order to avoiding oxidation of specimens. With a beam scanning apparatus, an area in 8 mm width was irradiated. After the laser treatments, the large primary Si crystals of as-received materials are transformed to fine particles and dispersed uniformly in surface layer because of rapid solidification after melting. In the case of laser surface alloying using silicon powder, the porous alloyed layers consisting of needle primary Si crystals are formed. While, by cobalt base self-fluxing alloy powder, the alloyed layer develops a dense structure except some blow holes formed by some gas contained in the alloy powder or Al–Si alloy specimens.

収録刊行物

  • 軽金属

    軽金属 47(5), 292-297, 1997-05-30

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10003795478
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    4217036
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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