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Aluminum coated steel sheet and process for producing the same

  • US 4,546,051 A
  • Filed: 06/12/1984
  • Issued: 10/08/1985
  • Est. Priority Date: 07/08/1982
  • Status: Expired due to Term
First Claim
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1. An aluminum hot dip coated steel sheet consisting essentially of(1) a steel substrate containing 0.002 to 0.02% by weight of solute N and not more than √

  • 5/3N-1/300% by weight of total C, wherein N represents the percentage of the solute N, and having a recrystallized structure;

    (2) an aluminum coating layer on at least one surface of said steel substrate comprising essentially Al and 1 to 15% by weight of spheroidal Si and having a recrystallized structure, and;

    (3) a discontinuous intermediate layer at the interface between said steel substrate and aluminum coating layer and comprising essentially Al--Fe--Si intermetallic compounds.

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