Sliding member

Patent metadata

Field	Value
Publication number	US-12196262-B2
Application number	US-202217839622-A
Country	US
Kind code	B2
Filing date	Jun 14, 2022
Priority date	Jun 29, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

The present invention provides a sliding member which enables further reduction of friction and improvement of seizure resistance without deteriorating wear resistance of a sliding surface. The sliding member includes a porous metal base material, and a resin material with which the porous metal base material is impregnated. The sliding member includes an exposed sliding surface. The sliding surface includes a top surface made of the resin material, and a bottom surface made of the porous metal base material. A height from the bottom surface to the top surface is 10 to 30 μm, and the resin material includes fluorine resin.

First claim

The invention claimed is:

1. A sliding member comprising a porous metal base material, and a resin material with which the porous metal base material is impregnated, wherein
the sliding member comprises an exposed sliding surface, the exposed sliding surface comprises a bottom surface made of the porous metal base material, and a top surface made of the resin material that is higher than the bottom surface, a height from the bottom surface to the top surface is 10 to 30 μm, the top surface does not extend below the bottom surface, and the resin material includes fluorine resin.

2. The sliding member according to claim 1 , wherein a ratio of a total area of the bottom surface to the exposed sliding surface is 5 to 60%.

3. The sliding member according to claim 1 , further comprising a back metal, wherein the porous metal base material and the resin material are arranged on one surface of the back metal.

4. The sliding member according to claim 2 , further comprising a back metal, wherein the porous metal base material and the resin material are arranged on one surface of the back metal.

5. The sliding member according to claim 1 , wherein the porous metal base material is formed of a spherical or irregular-shaped metal or alloy.

6. A sliding member comprising a porous metal base material, and a resin material with which the porous metal base material is impregnated, wherein
the sliding member comprises an exposed sliding surface, the exposed sliding surface comprises a bottom surface made of the porous metal base material, and a flat top surface made of the resin material that is higher than the bottom surface, a height from the bottom surface to the top surface is 10 to 30 μm, and the resin material includes fluorine resin.

7. The sliding member according to claim 6 , wherein a ratio of a total area of the bottom surface to the exposed sliding surface is 5 to 60%.

8. The sliding member according to claim 6 , further comprising a back metal, wherein the porous metal base material and the resin material are arranged on one surface of the back metal.

9. The sliding member according to claim 7 , further comprising a back metal, wherein the porous metal base material and the resin material are arranged on one surface of the back metal.

10. The sliding member according to claim 6 , wherein the porous metal base material is formed of a spherical or irregular-shaped metal or alloy.

11. A sliding member comprising a porous metal base material, and a resin material with which the porous metal base material is impregnated, wherein
the sliding member comprises an exposed sliding surface, the exposed sliding surface comprises a bottom surface made of the porous metal base material, and a top surface made of the resin material that is higher than the bottom surface, a height from the bottom surface to the top surface is 10 to 30 μm, the entire top surface extending above the bottom surface, and the resin material includes fluorine resin.

12. The sliding member according to claim 11 , wherein a ratio of a total area of the bottom surface to the exposed sliding surface is 5 to 60%.

13. The sliding member according to claim 11 , further comprising a back metal, wherein the porous metal base material and the resin material are arranged on one surface of the back metal.

14. The sliding member according to claim 12 , further comprising a back metal, wherein the porous metal base material and the resin material are arranged on one surface of the back metal.

15. The sliding member according to claim 11 , wherein the porous metal base material is formed of a spherical or irregular-shaped metal or alloy.

Assignees

• Daido Metal Co

Inventors

• Yamamoto Ayako
• Ito Yoshifumi

Classifications

• B22F3/114

  the porous products being formed by impregnation (B22F3/1137, B22F3/26 take precedence) · CPC title

• B22F7/004

  comprising at least one non-porous part · CPC title

• B22F7/00

  Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting {wherein at least one part is obtained by sintering or compression (application of coating layers by use of metal powders, see C23C)} · CPC title

• F16C2240/60

  Thickness, e.g. thickness of coatings · CPC title

• F16C2220/20

  by sintering pulverised material, e.g. powder metallurgy · CPC title