# US 9,039,965 B2 · Copper-based slide member

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,039,965 B2
- Document ID: US9039965B2
- Status: Granted
- Kind: B2
- Application number: 13/633,168
- Filed: 2012-10-02
- Published: 2013-04-11
- Granted: 2015-05-26
- Earliest claimed: 2011-10-06
- Assignees: Daido Metal Company Ltd.
- Applicants: Daido Metal Company Ltd.
- Inventors: Kazuaki Toda; Satoru Kurimoto
- Web page: https://patentgrep.com/patent/US9039965B2

## CPC

- C22C 9/04: with zinc as the next major constituent
- C22C 9/00: Alloys based on copper
- C22C 9/05: with manganese as the next major constituent
- C22C 9/10: with silicon as the next major constituent
- F16C 33/121: {Use of special materials}
- F16C 2204/14: with zinc as the next major constituent
- F16C 2360/22: Internal combustion engines
- F16C 2360/24: Turbochargers
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

In a copper-based slide member in which needle-shaped Mn—Si based compounds are dispersed in a brass structure, 50% or more of a total number of the needle-shaped Mn—Si based compounds having lengths of 50 μm or more in a major axis direction are constituted of a plurality of small particles. Thereby, even if the needle-shaped Mn—Si based compounds fall off during sliding, the small particles which constitute the needle-shaped Mn—Si based compounds may fall off. Thus, the frequency of falling off of the coarse needle-shaped Mn—Si based compound which damages a shaft and a bearing is decreased. Therefore, seizure hardly occurs.

## Claims

### Claim 1

A copper-based slide member comprising a brass in which Mn—Si based compounds are dispersed in a brass structure,
wherein the Mn—Si based compounds contain particles of needle-shaped Mn—Si based compounds having lengths of 50 μm or more in a major axis direction, and 50% or more of a total number of the needle-shaped Mn—Si based compounds are constituted of a plurality of segmented particles.

### Claim 2 (depends on 1)

The copper-based slide member according to claim 1,
wherein all of the needle-shaped Mn—Si based compounds having the lengths of 50 μm or more in the major axis direction in the copper-based slide member are constituted of a plurality of segmented particles.

### Claim 3 (depends on 1)

The copper-based slide member according to claim 1,
wherein in 70% or more of the total number of the segmented particles which constitute the needle-shaped Mn—Si based compounds having the lengths of 50 μm or more in the major axis direction in the copper-based slide member, lengths of the segmented particles are 45 μm or less with respect to the major axis direction of the needle-shaped Mn—Si based compounds having the lengths of 50 μm or more in the major axis direction.

### Claim 4 (depends on 1)

The copper-based slide member according to claim 1,
wherein the copper-based slide member contains 3 volume % to 50 volume % of the needle-shaped Mn—Si based compounds having the lengths of 50 μm or more in the major axis direction.

### Claim 5 (depends on 1)

The copper-based slide member according to claim 1,
wherein the copper-based slide member is constituted of 20 mass % to 45 mass % of Zn, 0.3 mass % to 2.0 mass % of Si, and 1.0 mass % to 6.0 mass % of Mn, the balance being Cu and inevitable impurities.

### Claim 6 (depends on 1)

The copper-based slide member according to claim 1,
wherein the copper-based slide member further contains 0.1 mass % to 5 mass % in total of at least one element selected from the group consisting of Fe, Al, Ni, Sn, Cr, Ti, Mo, Co, Zr and Sb.

### Claim 7 (depends on 1)

The copper-based slide member according to claim 1,
wherein the copper-based slide member further contains 0.1 mass % to 5 mass % in total of at least one element selected from the group consisting of Pb and Bi.