Hot-dip zn-al alloy coated steel sheet and its manufacturing method

Hot-dip zn-al alloy coated steel sheet and its manufacturing method

  • CN 104,561,874 B
  • Filed: 11/08/2007
  • Issued: 06/21/2019
  • Est. Priority Date: 11/10/2006
  • Status: Active Grant
First Claim
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1. a kind of hot-dip zn-al alloy coated steel sheet, which is characterized in that closed with hot dip Zn-Al system at least one surface of steel plateLayer gold, hot dip Zn-Al system alloy-layer contain mass %, Mg:

  • 0.2 of Al;

    1.0~10~1.0 mass % and Ni;

    0.005~0.1 mass %, and surplus is made of Zn and inevitable impurity, is enriched in the most surface section of hot dip Zn-Al system alloy-layerThere is Ni,Hot dip Zn-Al system alloy-layer contains the binary eutectic and Al-Zn-MgZn of Zn-Al2The ternary eutectic of intermetallic compound,Hot dip Zn-Al system alloy-layer, in terms of coating section, the Al-Zn-MgZn containing 10~30 area %2Intermetallic compoundTernary eutectic,The average major diameter of the binary eutectic of Zn-Al be 10 μ

    m hereinafter,Using Grossmeters measurement 60 °

    of mirror surface lusters be 100 or more and 250 hereinafter,Indicate that the △

    L of anti-blackening is 3 or less.

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