Process for producing an aluminum alloy sheet
    111.
    发明授权
    Process for producing an aluminum alloy sheet 有权
    铝合金板的制造方法

    公开(公告)号:US06248193B1

    公开(公告)日:2001-06-19

    申请号:US09508172

    申请日:2000-05-12

    CPC classification number: C22F1/047

    Abstract: A continuously cast and rolled sheet of an aluminum alloy having Mg in a content of 3 to 6% by weight is annealed, followed by strain correction, heat and hold treatment at a given temperature between 240° C. and 340° C. for one hour or more, and slowly cooling treatment, to thereby provide an aluminum alloy sheet having enhanced resistance to stress corrosion cracking and improved shape fixability. The slowly cooling treatment is carried out at a cooling rate chosen from a preset cooling zone corresponding to a present temperature zone S defined in obliquely lined surround form in the accompanying drawing.

    Abstract translation: 将具有3〜6重量%的Mg的铝合金的连续铸造和轧制板退火,然后在240℃〜340℃的给定温度下进行应变校正,热处理和保持处理,一个 小时以上,缓慢冷却处理,从而提供具有增强的耐应力腐蚀开裂性和改善的形状固定性的铝合金板。 缓慢冷却处理以选自对应于在附图中以倾斜排列的环绕形式限定的当前温度区域S的预设冷却区域中的冷却速率进行。

    Low voltage aluminum commutators
    116.
    发明授权
    Low voltage aluminum commutators 失效
    低压铝换向器

    公开(公告)号:US3983431A

    公开(公告)日:1976-09-28

    申请号:US535348

    申请日:1974-12-23

    CPC classification number: H01R43/06 H01R39/04

    Abstract: In accordance with a preferred embodiment of this invention, a commutator for electrical machines having a polymeric spool and aluminum alloy bars uniformly spaced around its periphery is formed. This commutator is useful in low voltage applications wherein the applied or produced voltage may vary from 3 to 30 volts. A critical feature in forming this commutator is the combination of an electrolytic etch and an electrolytic oxide formation on the surface of the aluminum alloy bars. This combination of steps provides means for bonding the aluminum alloy bars to the polymeric spool and also lowers the electrical resistance of alumina. In addition, alloying elements, preferably iron, increase the conductivity of the alumina layer and directionally balance the electrical resistance across the aluminum-alumina junction.

    Abstract translation: 根据本发明的优选实施例,形成了具有聚合物线轴和围绕其周边均匀间隔的铝合金条的电机的换向器。 该换向器在低电压应用中是有用的,其中所施加或产生的电压可以在3至30伏之间变化。 形成该换向器的关键特征是在铝合金棒的表面上电解蚀刻和电解氧化物形成的组合。 这种步骤的组合提供了将铝合金棒粘合到聚合物线轴上并且还降低氧化铝的电阻的手段。 此外,合金元素,优选铁,增加氧化铝层的导电性,并且定向平衡铝 - 氧化铝结的电阻。

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