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    • 76. 发明授权
    • Method of producing hardened aluminum alloy forming sheet having high
strength and superior corrosion resistance
    • 制造具有高强度和优异的耐腐蚀性的硬化铝合金成形片的方法
    • US4968356A
    • 1990-11-06
    • US482306
    • 1990-02-20
    • Hiroki TanakaShin TsuchidaYuji Suzuki
    • Hiroki TanakaShin TsuchidaYuji Suzuki
    • C22C21/06C22F1/047G11B23/087
    • C22C21/06C22F1/047G11B23/08778
    • A method of producing a hardened aluminum alloy forming sheet having a high strength and a superior corrosion resistance, the method comprising the steps of (1) providing a melt having a composition consisting of, in weight percentage, 4.0 to 6.0% Mg, 0.05 to 0.50% Cu, 0.10 to 1.0% Mn, 0.01 to 0.05% Ti and the balance being aluminum and impurities; (2) cooling to solidify the melt; (3) hot rolling and cold rolling to form a rolled sheet; and (4) heat treating the rolled sheet by heating to a temperature of 150.degree. to 300.degree. C. at a heating rate of at least 5.degree. C./second, holding within five minutes at the temperature of 150.degree. to 300.degree. C. and cooling to a temperature of 70.degree. C. or less at a cooling rate of at least 30.degree. C./second. The melt may further contain 0.05 to 0.20% by weight Cr and the heat treatment of the step (4) may be carried out under tension after flattening said cold-rolled sheet by leveling at ordinary temperatures. The aluminum alloy sheet is especially suitable for use in manufacturing easy open can ends.
    • 一种制造具有高强度和优异的耐腐蚀性的硬化铝合金形成片材的方法,所述方法包括以下步骤:(1)提供一种熔体,其熔体组成由重量百分比组成,4.0%至6.0%的Mg,0.05至 0.50%Cu,0.10〜1.0%Mn,0.01〜0.05%Ti,余量为铝和杂质; (2)冷却固化熔体; (3)热轧冷轧以形成轧制板; 和(4)以150℃〜300℃的温度加热至150℃〜300℃的温度,以5℃/秒以上的加热速度进行热处理。 并以至少30℃/秒的冷却速度冷却至70℃以下的温度。 熔融物还可以含有0.05〜0.20重量%的Cr,并且可以在常压下平整所述冷轧板后使其在张力下进行热处理。 铝合金板材特别适用于制造易开罐罐头。