| 摘要 |
There is provided a sliding part in which a surface coverage ratio of copper in the sliding part increases. A bearing which is the sliding part is formed by filling the raw powder into the filling portion of the forming mold, compacting the raw powder to form a powder compact 6, and sintering the powder compact 6. A copper-based raw powder is composed of a copper-based flat raw powder 2 having an average diameter smaller than that of an iron-based raw powder 1 and an aspect ratio larger than that of the iron-based raw powder 1, and a copper-based small-sized raw powder 3 having the average diameter is smaller than that of the copper-based flat raw powder 2. The copper is allowed to segregate at the surface of the sliding part. In the bearing in which the copper-based flat powder 2 segregates at the surface, the surface is covered with the copper-based small-sized raw powder 3 that has emerged on the surface, as well as the copper-based flat raw powder 2, thereby it is possible to increase the surface coverage ratio of copper. Furthermore, containing calcium fluoride improves the seizure resistance. |
