| 摘要 |
Convex portions are formed by directly quenching the sliding surface of the sliding member in a line shape or a dot shape, and concave portions are formed in indirectly quenched portions adjacent to the directly quenched portions, whereby an irregular surface is formed on the sliding surface by the directly quenched portions and the indirectly quenched portions. The directly quenched portions are formed in a lattice shape, a parallel straight line shape, a concentric circle shape or a spiral shape. By forming the irregular surface on the sliding surface by the directly quenched portions and the indirectly quenched portions, the seizure resistance can be improved. |
