# US 10,309,457 B2 · Sliding member

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- Number: US 10,309,457 B2
- Document ID: US10309457B2
- Status: Granted
- Kind: B2
- Application number: 14/388,016
- Filed: 2013-03-04
- Published: 2015-02-19
- Granted: 2019-06-04
- Earliest claimed: 2012-03-27
- Assignees: Senju Metal Industry Co., Ltd.
- Applicants: Senju Metal Industry Co., Ltd.
- Inventors: Naoki Sato; Ryoichi Kurata
- Web page: https://patentgrep.com/patent/US10309457B2

## CPC

- F16C 33/12: Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F04B 1/2021: characterised by the contact area between cylinder barrel and valve plate
- F04B 1/2028: Bearings
- F16C 33/14: Special methods of manufacture; Running-in
- F16C 33/20: Sliding surface consisting mainly of plastics (F16C33/22 - F16C33/28 take precedence)
- F01B 3/0073: {swash plate bearing means or driving or driven axis bearing means}
- F16C 17/04: for axial load only
- F16C 33/10: Construction relative to lubrication {(lubrication in general F16N)}
- F16C 2202/04: Hardness
- F16C 2204/10: Alloys based on copper
- F16C 2204/12: with tin as the next major constituent
- F16C 2223/08: shot-peening, blasting
- F16C 2240/40: Linear dimensions, e.g. length, radius, thickness, gap
- F16C 2240/48: Particle sizes
- F16C 2240/54: Surface roughness
- F16C 2360/00: Engines or pumps
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F01B: MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES (of rotary-piston or oscillating-piston type F01C; of non-positive-displacement type F01D; internal-combustion engines F02B; combustion-product engine plants F02G; machines or engines, other than of positive-displacement type, for liquids F03B; positive-displacement engines driven by liquids F03C; wind motors F03D; positive-displacement machines for liquids F04B; rotary-piston, or oscillating-piston, positive-displacement machines for liquids F04C)

## Abstract

To provide a sliding member which has hardness that is suitable for the circumstance, to which heavy load is applied, and which is excellent in abrasion resistance property. The sliding member contains a sliding layer for slidably supporting a body to be slid, shot blasting being performed on a surface of the sliding layer, and a sliding surface formed on a surface of the sliding layer, the sliding surface having an uneven configuration with arithmetic mean roughness (Ra) of 1.0 μm through 2.5 μm, 10-point average roughness (Rz) of 5.0 μm through 10.0 μm, and surface hardness (Hv) of 220 through 250.

## Claims

### Claim 1

A sliding member comprising:
a sliding surface formed on a surface of a sliding layer which is impact-hardened by a shot-blasting treatment, wherein the surface of the sliding surface has an uneven shape to form an oil reservoir, wherein the sliding surface exhibits arithmetic mean roughness (Ra) in the range of 1.0 μm through 2.5 μm, 10-point average roughness (Rz) in the range of 5.0 μm through 10.0 μm and surface hardness (Hv) in the range of 220 through 250, and the sliding surface slidably supports a body to be slid, and wherein the sliding layer is composed of a copper alloy having a surface hardness (Hv) of 80 through 150 before the shot-blasting treatment.

### Claim 2 (depends on 1)

The sliding member according to claim 1 wherein the shot blasting has been performed using blasting material which comprises steel-based metallic material, the blasting material comprising particles having a spherical shape with a particle size in the range of 180 μm through 300 μm and surface hardness (Hv) in the range of 280 through 600.

### Claim 3 (depends on 1)

The sliding member according to claim 1 wherein the shot blasting includes using a blasting distance of not less than 50 mm and not more than 150 mm for a period of blasting time of not less than 5 seconds and not more than 30 seconds.