摘要:
Provided is a sintered bearing (1, 2) for a fuel pump, including raw material powder including 8.5% by weight to 10% by weight of aluminum, 0.1% by weight to 0.6% by weight of phosphorus, and the balance including copper as a main component, and inevitable impurities. The sintered bearing (1, 2) has a structure of a sintered aluminum-copper alloy, and has a pore formed in a surface layer portion of the sintered bearing, which is smaller in size than an internal pore of the sintered bearing.
摘要:
Provided is a sintered bearing (1) for an EGR valve, including raw material powder including 9% by weight to 12% by weight of aluminum, 0.1% by weight to 0.6% by weight of phosphorus, 3% by weight to 10% by weight of graphite, and the balance including copper as a main component, and inevitable impurities. The sintered bearing (1) has a structure of a sintered aluminum-copper alloy. The sintered bearing further includes free graphite distributed in pores formed so as to be dispersed.