| 摘要 |
919,513. Powder metallurgy. MUELLER BRASS CO. Sept. 21, 1961 [Oct. 16, 1960], No. 33912/61. Class 82 (1). A bearing pin comprising a cylindrical cone such as steel or cast iron and a sintered layer of a bearing alloy is made by applying the bearing powder to the core, sintering to effect bonding and then densifying and sizing the sintered coating by drawing through a sizing die. The bearing alloy powder is a copper base alloy containing up to 15% tin, up to 25% lead and up to 3% antimony and is applied to the steel cone 6 as a layer 12 in a graphite mould 14. The core 6 is located on a pin 22 in mould 14 and after charging with the powder 12 which may be a mixture of the components or a pre-alloy of a particle size 100 mesh to 325 mesh, the pin 22 is then removed and the assembly is sintered at 1400-1900‹ F. The sintered bearing pin is then removed from the mould and pressed through a sizing die which may also incorporate groove cutters to form oil grooves in the finished bearing pin. |
