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    • 7. 发明授权
    • Method of manufacturing natural aging-retardated aluminum alloy sheet
exhibiting excellent formability and excellent bake hardenability
    • 具有优异的成形性和优异的烘烤淬透性的天然老化延迟铝合金板的制造方法
    • US5441582A
    • 1995-08-15
    • US188155
    • 1994-01-27
    • Takeshi FujitaShinji MitaoKohei HasegawaMasataka Suga
    • Takeshi FujitaShinji MitaoKohei HasegawaMasataka Suga
    • C22C21/06C22F1/047C22C21/08
    • C22C21/06C22F1/047
    • Disclosed is a method manufacturing an aluminum alloy sheet comprising preparing an aluminum alloy ingot essentially consisting of 1.5 to 3.5% by weight of Mg, 0.3% to 1.0% by weight of Cu, 0.05 to 0.35% by weight of Si, 0.03 to 0.5% by weight of Fe, 0.005 to 0.15% by weight of Ti, 0.0002 to 0.05% by weight of B and a balance of Al, in which the ratio of Mg/Cu is in the range of 2 to 7, homogenizing the ingot in one step or in multiple steps, performed at a temperature within the range of 400.degree. to 580.degree. C., preparing an alloy sheet having a desired sheet thickness by subjecting the ingot to a hot rolling and a cold rolling, subjecting the alloy sheet to a heat treatment including heating the sheet up to a range of 500.degree. to 580.degree. C. at a heating rate of 3.degree. C./second or more, keeping it at the temperature reached for 0 to 60 seconds, and cooling at a cooling rate of 2.degree. C./second or more, subjecting the alloy sheet to a preliminary aging treatment performed at a temperature within the range of 45.degree. to 100.degree. C. for 2 to 48 hours after keeping at room temperature or immediately after the heat treatment, and subjecting the alloy sheet to a restoring treatment performed at a temperature within the range of 180.degree. to 300.degree. C. for 3 to 60 seconds. Thus, a natural aging-retardated aluminum alloy sheet exhibiting excellent formability and excellent bake hardenability is obtained.
    • 公开了一种制造铝合金板的方法,其包括制备基本上由1.5至3.5重量%的Mg,0.3重量%至1.0重量%的Cu,0.05至0.35重量%的Si,0.03至0.5重量% 的Fe,0.005〜0.15重量%的Ti,0.0002〜0.05重量%的B,余量为Al,其中Mg / Cu的比例在2〜7的范围内,将锭均质化为1 在400〜580℃的温度范围内进行工序或多步骤,通过对锭进行热轧和冷轧,制备具有所需片材厚度的合金板,对合金板进行 热处理,包括以3℃/秒以上的加热速度将片材加热至500〜580℃的范围,将其保持在0〜60秒的温度下,以冷却速度 在2℃/秒以上的温度下进行预熟化处理 在室温或立即热处理后保持2〜48小时,在45〜100℃的范围内进行2〜48小时,在180〜300℃的温度范围内进行恢复处理 C. 3至60秒。 因此,获得了优异的成形性和优异的烘烤淬透性的自然老化延迟铝合金板。