Patent ID: 8252733

Claim:
A sliding material, comprising: a metallic substrate comprising a composite material having a first porous metallic material and a second metallic substrate in which the first porous metallic material is cast-wrapped, wherein the second metallic substrate is softer than the first porous metallic substrate, and the first porous metallic substrate is exposed in a sliding surface of the metallic substrate; and an adhered metal being formed by mechanical adhesion by means of shot blasting metallic particles onto the sliding surface of said metallic substrate thereby to cover 8% or more of the sliding surface of said metallic substrate, whereby the metallic particles are softer than the first porous metallic substrate, but harder than the second metallic substrate and exhibit smaller friction coefficients than-that of said metallic substrate, wherein: by said shot blasting, dented portions are formed on an outer surface of the second metallic substrate, the depth of each dented portion from the outer surface of the second metallic substrate is 0.1 μm-5 μm, and the diameter of which is 5 μm-100 μm.