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

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

    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。