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    • 10. 发明授权
    • Metal treatment to eliminate hot tear defects in low silicon aluminum alloys
    • 金属处理以消除低硅铝合金中的热撕裂缺陷
    • US08980021B2
    • 2015-03-17
    • US12060990
    • 2008-04-02
    • Herbert W. DotyFawzy H SamuelAhmed M Nabawy
    • Herbert W. DotyFawzy H SamuelAhmed M Nabawy
    • B22D27/20B22D21/04C22C21/16
    • B22D27/20B22D21/04C22C21/16
    • An aluminum alloy and a method of casting. At least one of zirconium, scandium, a nucleating agent selected from the group consisting of metal carbides, aluminides and borides, and rare earth elements are added to the alloy while in the molten state such that upon solidification, the cast alloy exhibits improved hot tear resistance. In a particular form, the nucleating agent may be titanium diboride for grain refining. Other agents that can be used for grain refining include scandium, zirconium, silicon, silver and one or more rare earth elements. In the case of rare earth elements, mischmetal may be used as a precursor. Combinations of titanium diboride and at least one other agent are especially effective in reducing the incidence of hot tearing in products cast from the modified aluminum alloy.
    • 铝合金和铸造方法。 在熔融状态下,在合金中加入锆,钪,选自金属碳化物,铝化物和硼化物的成核剂中的至少一种,并且在固化时,铸造合金表现出改善的热撕裂 抵抗性。 在特定形式中,成核剂可以是用于晶粒细化的二硼化钛。 可用于晶粒细化的其它试剂包括钪,锆,硅,银和一种或多种稀土元素。 在稀土元素的情况下,可以使用混合稀土作为前体。 二硼化钛和至少一种其它试剂的组合在降低由改性铝合金铸造的产品中热撕裂的发生率方面特别有效。