Powder-metallurgically produced composite material and method for its production
    1.
    发明授权
    Powder-metallurgically produced composite material and method for its production 失效
    粉末冶金复合材料及其生产方法

    公开(公告)号:US06312495B1

    公开(公告)日:2001-11-06

    申请号:US09545361

    申请日:2000-04-07

    IPC分类号: B22F300

    摘要: The present invention relates to a powder-metallurgically produced composite material comprising a matrix and a granular additive comprising at least one fine-grained refractory metal with an average grain size of at most 2 &mgr;m uniformly distributed in the matrix, so that the composite exhibits a residual porosity of

    摘要翻译: 本发明涉及一种粉末冶金制造的复合材料,其包含基质和颗粒添加剂,其包含均匀分布在基质中的至少一种平均粒度至多为2μm的细粒难熔金属,使得该复合材料显示出 残余孔隙度<0.5%。 此外,本发明涉及一种生产复合材料的方法及其作为电接触材料的用途。

    Powder-metallurgically produced composite material and method for its production
    3.
    发明授权
    Powder-metallurgically produced composite material and method for its production 失效
    粉末冶金复合材料及其生产方法

    公开(公告)号:US06350294B1

    公开(公告)日:2002-02-26

    申请号:US09490659

    申请日:2000-01-25

    IPC分类号: C22C105

    摘要: The present invention relates to powder-metallurgically produced composite material comprising a matrix of a metal with a melting point of at most 1,200° C. and a granular additive which consists of at least two refractory components embedded in said matrix, characterized in that the refractory components are present as mixed crystals or intermetallic phases. In one embodiment of the invention one or a first group of refractory component(s) has a melting point in the range of 1,500 to 2,400° C. and the second or the second group of refractory component(s) has a melting point above 2,400° C. The composite material is produced by heating a pulverized mixture of the refractory components, thus converting it into a mixed crystal or an intermetallic phase, and then combining the powder obtained by cooling and pulverizing with a metal matrix having a melting point of at most 1,200° C. by means of powder-metallurgy. The composite material of the present invention is suitable as switching contact in electrical vacuum switch boxes.

    摘要翻译: 本发明涉及粉末冶金制造的复合材料,其包含熔点至多1200℃的金属基质和由至少两种嵌入所述基质中的难熔组分组成的颗粒添加剂,其特征在于,耐火材料 组分以混晶或金属间相存在。 在本发明的一个实施方案中,一种或第一组耐火组分的熔点在1500-2400℃的范围内,第二组或第二组耐火组分的熔点高于2,400 该复合材料通过加热耐火组分的粉碎混合物,从而将其转化为混合晶体或金属间相来制备,然后将通过冷却和粉碎获得的粉末与熔点为 最多1200℃,通过粉末冶金。 本发明的复合材料适用于电真空开关盒中的开关触点。