Si, Mn, P添加高強度溶融亜鉛めっき鋼板の合金化特性および耐パウダリング性に及ぼす内部酸化の影響 Effect of Internal Oxidation on the Galvannealing Properties and the Anti-Powdering Properties of the Si, Mn, P Bearing High-Tensile Galvanized Steel Sheet

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During the heat treatment of 0.3mass%Si-1mass%Mn-0.07mass%P ultra low carbon hot-rolled steel, readily oxidizable elements such as Si, Mn and P were internally oxidized and a depletion layer of these elements was formed at the steel surface region. The amounts of Si and Mn selective surface oxidation of the cold-rolled steel were remarkably suppressed after recrystallization annealing.<br>By this heat treatment of the hot-rolled steel, the galvannealing rate of the galvanized steel was accelerated to a rate equivalent to that of mild steel. As a result, the galvannealing temperature of the galvannealed steel could be lowered and the anti-powdering properties of the galvannealed steel were remarkably improved.<br>The reasons for acceleration of the galvannealing behavior and the improvement of the anti-powdering properties, were considered as follows :<br>1) The amount of Si and Mn selective surface oxidation, which acted as a barrier for the Fe-Zn galvannealing reaction, was suppressed.<br>2) The amount of solute P, which delays the Fe-Zn galvannealing reaction, was reduced.<br>3) The reduction of galvannealing temperature brings about the suppression of the Γ and Γ1 phases formed at the higher temperature, those unfavorable for anti-powdering properties.<br>

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 58(3), 183-190, 2007-03-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10018868236
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    8754597
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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