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    Hardfacing method and nickel based hardfacing alloy
    1.
    发明授权
    Hardfacing method and nickel based hardfacing alloy 失效
    表面处理方法和镍基硬化合金

    公开(公告)号：US5935350A

    公开(公告)日：1999-08-10

    申请号：US790630

    申请日：1997-01-29

    申请人： Damodaran Raghu ,  Martin E. Lohrman

    发明人： Damodaran Raghu ,  Martin E. Lohrman

    IPC分类号： B23K35/30 ,  B29C47/60 ,  B32B15/18

    CPC分类号： B29C47/0844 ,  B23K35/304 ,  B29C47/0845 ,  B29C47/60 ,  B29C47/0009 ,  Y10T428/26

    摘要： A nickel based hardfacing alloy having the following elemental constituents, by weight: Cr, 16-22%; Mo, 1-7%; Si, 2.5-3.7%; C, 0.8-1.4%; B, 2-3%; Fe, 2-3.9%; Co, 4.3-17%; Ni and incidental impurities, balance. The alloy is in gas-atomized powder form suitable for deposition by plasma transferred arc welding, has a hardness in the range of about 50 Rc to 60 Rc, a coefficient of friction in the range of about 0.12 to 0.13, an ASTM G-65 wear rating in the range of about 20 to 26, and an ASTM G-77 wear rating in the range of about 0.0 to 0.074. A method of enhancing the abrasive wear resistance and metal-to-metal wear resistance of a substrate by welding a Ni based alloy having at least 40% Ni by weight, between 4% and 18% Co by weight, and between 2% and 3% B, onto wear surfaces of the substrate as a coating having a thickness between about 0.025 in. and about 0.5 in. A plastic extruder screw comprising a metallic body having screw flights and a coating on the screw flights, which coating is between about 0.025 in. and 0.5 in. thick, and is a Ni based alloy having between 4% and 18% Co by weight and between 2% and 3% B by weight.

    摘要翻译： 具有以下元素组成的镍基硬化合金，按重量计：Cr，16-22％; Mo，1-7％; Si，2.5-3.7％; C，0.8-1.4％; B，2-3％; Fe，2-3.9％; Co，4.3-17％; 镍和杂质杂质，平衡。 该合金是适于通过等离子体转移电弧焊接沉积的气体雾化粉末形式，硬度在约50Rc至60Rc的范围内，摩擦系数在约0.12至0.13的范围内，ASTM G-65 磨损等级在约20至26的范围内，ASTM G-77耐磨等级在约0.0至0.074的范围内。 通过焊接具有至少40重量％Ni，4重量％至18重量％的Co和2重量％至3重量％的Ni基合金，提高基材的耐磨损性和金属对金属耐磨性的方法 ％B，作为厚度在约0.025英寸至约0.5英寸之间的涂层的基底的磨损表面上。包括具有螺旋螺旋的金属体和螺旋螺旋上的涂层的塑料挤出机螺杆，该涂层在约0.025 在0.5和0.5英寸厚之间，并且是具有4重量％至18重量％的重量比和2重量％至3重量％的3重量％之间的Ni基合金。