Patent ID: 7763363
Filing Date: 2010-07-27
Classification: B22F,C22C,F16C,Y10T

Abstract:
1. A bearing for a motorized fuel pump, consisting of 21 to 35% by mass of Ni, 5 to 12% by mass of Sn, 3 to 7% by mass of C, 0.1 to 0.8% by mass of P, the balance of Cu, and inevitable impurities, said bearing including: a sintered matrix of Cu—Ni alloy grains; pores formed throughout the matrix at a porosity of 8 to 18%; a P component predominantly included at grain boundaries of the Cu—Ni alloy grains; free graphite distributed along inner surfaces of open pores, which are open to a surface of said bearing and extending into an inside of the bearing; and a Sn rich alloy layer which contains 50% or more by mass of Sn, and is formed on inner surfaces of said open pores and peripheries of openings of said open pores.