| 摘要 |
PURPOSE:To provide bearing materials, the lubrication and wear-resistance of which will not be lowered suddenly even if a surface bearing layer is worn away by impregnating at least fluororesin a porous layer formed by soaking Cu or Cu alloy with particles coated on the graphite surface and sintering same. CONSTITUTION:A porous layer 2 disposed on a steel plate back metal 1 is formed by spreading 1-5wt% of mixed powder containing powder particles 2a of Cu or Cu alloy and graphite powder particles 2b where the graphite surface is coated with Cu or Cu alloy of about 3mu in thickness by substitution plating or the like, and sintering same. If 5% or more of mixed powder is hindered among particles of Cu or Cu alloy. A surface bearing layer 4 is formed by impregnating gaps among holes of the porous layer 2 with materials 3 containing at least fluororesin, and exposing same from the surface of the porous layer 2. |
