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Aluminium alloy forging and method of manufacture for same

  • US 9,481,920 B2
  • Filed: 03/08/2011
  • Issued: 11/01/2016
  • Est. Priority Date: 03/31/2010
  • Status: Active Grant
First Claim
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1. An aluminum alloy forging, comprising:

  • Si;

    not less than 0.4% by mass but not more than 1.5% by mass,Fe;

    not less than 0.45% mass but not more than 1.0% by mass,Cu;

    not more than 0.40% by mass,Mg;

    not less than 0.8% by mass but not more than 1.3% by mass,Ti;

    not less than 0.01% by mass but not more than 0.1% by mass,Zn;

    not more than 0.05%,at least one member selected from the group consisting of Mn;

    no less than 0.01% by mass but not more than 1.0% by mass, Cr;

    not less than 0.1% by mass but not more than 0.4% by mass, and Zr;

    not less than 0.05% by mass but not more than 0.2% by mass,hydrogen;

    not more than 0.25 ml/100 g Al, andAl,wherein the aluminum alloy forging has an average grain size of 50 μ

    m or lower, a crystallized area ratio of 3% or lower, and an average crystallized grain size of 8 μ

    m or lower.

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