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    • 1. 发明授权
    • Aluminum alloy sheet with excellent formability and method for
manufacture thereof
    • 成形性优良的铝合金板及其制造方法
    • US6110297A
    • 2000-08-29
    • US317651
    • 1999-05-24
    • Noboru HayashiKunihiro YasunagaHiden YoshidaHidetoshi UchidaHideo Itoh
    • Noboru HayashiKunihiro YasunagaHiden YoshidaHidetoshi UchidaHideo Itoh
    • C23C22/00
    • C10M173/02C22C21/00C22C21/02C22F1/00C22F1/04C22F1/05C10M2205/14C10M2205/18C10M2213/00C10M2217/045C10M2217/0453C10M2229/02C10N2220/082C10N2250/08C10N2250/121
    • The invention provides an aluminum alloy sheet that has excellent formability, high coat-baking hardenability, excellent corrosion resistance, and is particularly suitable for external automobile body plates. The aluminum alloy sheet comprises: 0.9 to 1.3 wt. % of Si, 0.4 to 0.6 wt. % of Mg, 0.05 to 0.15 wt. % of Mn, 0.01 to 0.1 wt. % of Ti, with the remainder comprising Al and inevitable impurities, while limiting Fe as an impurity to 0.2 wt. % or less and Cu as an impurity to 0.1 wt. % or less. The aluminum homogenizing an aluminum ingot with the above-described composition; cooling the homogenized ingot to a temperature of 450.degree. C. or below to begin hot-rolling; finishing hot-rolling in a temperature range from 250 to 350.degree. C.; applying intermediate annealing to the hot-rolled plate; conducting cold-rolling at a draft of 70% or more; applying a solid solution treatment followed by quenching the alloy sheet and holding it at 530.degree. C. or above for 60 sec. or less; forming a chromate film onto the quenched alloy sheet; forming a film of a lubricant containing a water-dispersible polyurethane resin and a natural wax onto the chromate film; then applying a heat treatment to the coated alloy sheet in a temperature range of from 200 to 240.degree. C. for 60 sec. or less.
    • 本发明提供一种铝合金板,其具有优异的成形性,高涂层烧结淬透性,优异的耐腐蚀性,特别适用于外部汽车车身板。 铝合金板包括:0.9〜1.3重量% Si%,0.4〜0.6wt。 %的Mg,0.05〜0.15wt。 Mn%,0.01〜0.1重量% %的Ti,剩余部分包含Al和不可避免的杂质,同时将Fe作为杂质限制在0.2wt。 %以下,Cu为杂质至0.1重量%。 % 或更少。 铝均匀化具有上述组成的铝锭; 将均质锭冷却至450℃以下的温度,开始热轧; 在250〜350℃的温度范围内进行热轧。 对热轧板进行中间退火; 以70%以上的吃水进行冷轧; 进行固溶处理,然后淬火合金板并将其保持在530℃以上60秒。 或更少; 在淬火的合金板上形成铬酸盐膜; 在铬酸盐膜上形成含有水分散性聚氨酯树脂和天然蜡的润滑剂膜; 然后在200〜240℃的温度范围内对涂布的合金板进行热处理60秒。 或更少。