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    • 3. 发明授权
    • Copper precipitate carburized steels and related method
    • 铜沉淀渗碳钢及相关方法
    • US08118949B2
    • 2012-02-21
    • US11678066
    • 2007-02-23
    • Anil K. SachdevBenjamin L. TiemensGregory B. Olson
    • Anil K. SachdevBenjamin L. TiemensGregory B. Olson
    • C23C8/22C22C38/16
    • C23C8/22C23C8/80
    • A carburized and tempered hardened steel structure includes an iron based steel alloy including from about 3.7 to about 6 wt % copper, from 6 to about 10 wt % cobalt and from about 1 to about 10 wt % of non-ferrous secondary carbide formation elements selected from any of the group consisting of chromium, molybdenum, vanadium and combinations thereof. At least a percentage of the secondary carbide formation elements are in the form of metal carbides attached to nucleation sites on copper precipitates within a carburized portion of the structure, and wherein the copper precipitates are at least one of i) characterized by a mean copper precipitate radius of from about 0.1 nm to about 5 nm, or ii) characterized by a density of about 2.7×1018 per cubic centimeter.
    • 渗碳和回火硬化钢结构包括铁基钢合金,其包括约3.7至约6重量%的铜,6至约10重量%的钴和约1至约10重量%的选择的有色金属碳化物形成元素 由铬,钼,钒及其组合组成的组中的任一种。 所述次级碳化物形成元素的至少一部分是与所述结构的渗碳部分内的铜沉淀物的成核位置连接的金属碳化物的形式,并且其中所述铜沉淀物是i)中的至少一种,其特征在于平均铜沉淀物 半径为约0.1nm至约5nm,或ii)其特征在于密度为约2.7×10 18 /立方厘米。