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    Palladium alloys having utility in electrical applications
    1.
    发明授权
    Palladium alloys having utility in electrical applications 失效
    钯合金可用于电气应用

    公开(公告)号：US5236789A

    公开(公告)日：1993-08-17

    申请号：US891084

    申请日：1992-06-01

    申请人： John G. Cowie ,  Jacob Crane ,  Julius C. Fister

    发明人： John G. Cowie ,  Jacob Crane ,  Julius C. Fister

    IPC分类号： C22C5/04 ,  H01R13/03

    CPC分类号： H01R13/03 ,  C22C5/04 ,  Y10S428/929 ,  Y10S428/931 ,  Y10T428/12875 ,  Y10T428/12903

    摘要： A palladium alloy of the form Pd.sub.x M.sub.y M'.sub.z where M is at least one element selected from the group consisting of silicon, iron, nickel, copper, chromium, cobalt, boron and aluminum and M' is at least one element selected from the group consisting of titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium, tantalum and tungsten is provided. The alloys exhibit oxidation resistance and low electrical contact resistance and are particularly suited for electrical applications such as coatings for electrical contacts or connectors. In a preferred embodiment, the alloy is palladium/niobium containing from about 5 to about 10 atomic percent niobium.

    摘要翻译： 其中M为选自硅，铁，镍，铜，铬，钴，硼和铝和M'中的至少一种元素的PdxMyM'z形式的钯合金为选自以下的至少一种元素： 的钛，钒，铬，锆，铌，钼，铪，钽和钨。 该合金具有抗氧化性和低的电接触电阻，并且特别适用于电气应用，例如用于电触点或连接器的涂层。 在优选的实施方案中，该合金是含有约5至约10原子％铌的钯/铌。

    Palladium alloys having utility in electrical applications
    2.
    发明授权
    Palladium alloys having utility in electrical applications 失效
    钯合金可用于电气应用

    公开(公告)号：US5139891A

    公开(公告)日：1992-08-18

    申请号：US724241

    申请日：1991-07-01

    申请人： John G. Cowie ,  Jacob Crane ,  Julius C. Fister

    发明人： John G. Cowie ,  Jacob Crane ,  Julius C. Fister

    IPC分类号： C22C5/04 ,  H01R13/03

    CPC分类号： C22C5/04 ,  H01R13/03 ,  Y10S428/929 ,  Y10S428/931 ,  Y10T428/12875 ,  Y10T428/12903

    摘要： A palladium alloy of the form PdNbM where M is at least one element selected from the group consisting of silicon, iron, nickel, copper, cobalt, boron and aluminum is provided. The alloys exhibit oxidation resistance and electrical contact resistance and are particularly suited for electrical applications such as coatings for electrical contacts or connectors. In a preferred embodiment, the alloy contains from about 5 to about 10 atomic percent niobium.

    摘要翻译： 提供形式为PdNbM的钯合金，其中M为选自硅，铁，镍，铜，钴，硼和铝中的至少一种元素。 该合金具有抗氧化性和电接触电阻，并且特别适用于诸如用于电触点或连接器的涂层的电气应用。 在优选的实施方案中，合金含有约5至约10原子％的铌。

    Apparatus and method for die casting
    3.
    发明授权
    Apparatus and method for die casting 失效
    压铸装置及方法

    公开(公告)号：US06786272B2

    公开(公告)日：2004-09-07

    申请号：US09727088

    申请日：2000-11-30

    申请人： John G. Cowie ,  Dale T. Peters ,  Edwin Brush ,  Kenneth P. Young ,  Stephen Midson ,  Jack Daugherty

    发明人： John G. Cowie ,  Dale T. Peters ,  Edwin Brush ,  Kenneth P. Young ,  Stephen Midson ,  Jack Daugherty

    IPC分类号： B22D1710

    CPC分类号： B22D17/24 ,  B22D19/0054

    摘要： The present invention provides a method and apparatus for die-casting copper and other metals that are cost-effective and practical for production use in die-casting, for example, copper motor rotors. In motor rotors, the incorporation of die-cast copper for conductor bars and end rings in place of aluminum is known to result in improvements in motor energy efficiency. Previous attempts to die-cast copper motor rotors in a commercially feasible manner have failed because copper's high melting point places too great a stress on the die material, resulting in cracking and fracturing of the molds. High temperature die materials such as nickel, tungsten and molybdenum based alloys with a high melting point are employed, and a die casting apparatus is provided to pre-heat the molds prior to injection of the molten copper. Pre-heating and high operating temperatures provide extended die life. By preheating, the die materials experience reduced cyclic stresses associated with thermal expansion, because the thermal shock that results from the difference in temperature between the molten copper and the surface of the mold is reduced, ideally below the yield strength of the mold material. Extended die life provides the opportunity for economically viable copper motor rotor die-casting.

    摘要翻译： 本发明提供了一种用于压铸铜和其它金属的方法和装置，其在压铸中用于生产中具有成本效益和实用性，例如铜电机转子。 在电机转子中，已知用于导体棒和端环代替铝的压铸铜的结合导致电动机能量效率的改善。 以前以商业可行的方式压铸铜电机转子的尝试失败了，因为铜的高熔点对模具材料施加过大的应力，导致模具的开裂和断裂。 使用高温模具材料，例如具有高熔点的镍，钨和钼基合金，并且提供压铸装置以在注入熔融铜之前对模具进行预加热。 预热和高工作温度提供延长的模具寿命。 通过预热，由于由熔融铜和模具表面之间的温度差导致的热冲击降低，理想地低于模具材料的屈服强度，因此模具材料经历与热膨胀相关的减小的循环应力。 延长的模具寿命为经济可行的铜电机转子压铸提供了机会。