ABRASION-RESISTANT BEARING OF MOTOR TYPE FUEL PUMP

摘要

An abrasion-resistant bearing of a motor type fuel pump, which comprises a sintered product from a green compact having a composition in mass %: graphite: 1 to 5 %, a Cu-P alloy containing 5 to 10 % of P: 2 to 9 %, and a Cu-Ni alloy containing 21 to 26 % of Ni: the balance, and has a structure wherein a base of Cu-Ni alloy grains contains pores dispersed therein at a porosity of 8 to 18 %, and the above P component and free graphite are respectively distributed in mutual grain boundaries of the above Cu-Ni alloy grains and in the inside of the above pores.