# US 5,346,668 A · Copper based alloy for wear resistant sliding layer and sliding member

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- Number: US 5,346,668 A
- Document ID: US5346668A
- Status: Granted
- Kind: A
- Application number: 08/040,028
- Filed: 1993-03-30
- Granted: 1994-09-13
- Earliest claimed: 1992-03-31
- Assignees: Daido Metal Company Ltd.
- Inventors: Tadashi Tanaka; Masaaki Sakamoto; Koichi Yamamoto; Kenji Sakai
- Web page: https://patentgrep.com/patent/US5346668A

## CPC

- C22C 9/08: with lead as the next major constituent
- C22C 9/04: with zinc as the next major constituent
- F16C 33/121: {Use of special materials}
- F16C 17/04: for axial load only
- F16C 17/18: with floating brasses or brushing, rotatable at a reduced speed {(F16C17/03, F16C17/06 take precedence)}
- F16C 2204/14: with zinc as the next major constituent
- 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

A Cu-based wear-resistant alloy of a sliding material consists essentially of, by weight, 10-35% Zn, 2-20% Pb, 1-10% Ni, 0.1-1% B and, as required, 0.5-10% of Sn. The alloy can be used under severe conditions of use at elevated speed and temperature with reduced risk of seizure and corrosion. The alloy can be produced by mixing Pb powder and Ni--B alloy powder with Cu--Zn powder or Cu--Zn--Sn alloy powder, or mixing Ni--B alloy powder with Cu--Zn--Pb alloy powder or Cu--Zn--Sn--Pb alloy powder. The alloy can be compacted and sintered to form a sliding member or a composite sliding member is obtained by sintering and integrating the alloy on a steel backing plate optionally having a surface plated with copper.

## Claims

### Claim 1

A wear-resistant sliding layer having superior anti-seizure and corrosion properties formed of a sintered alloy consisting essentially of 10 to 35 wt % of zinc, 10 to 20 wt % of lead, 1 to 10 wt % of nickel, 0.1 to 1 wt % of boron, and balance copper and unavoidable impurities.

### Claim 2 (depends on 1)

A wear-resistant sliding layer according to claim 1, wherein the alloy further comprises 0.5 to 10 wt % of tin.

### Claim 3 (depends on 1)

A wear-resistant sliding member comprising: a backing metal layer of a steel plate optionally having a surface plated with copper, and a sliding alloy layer of claim 1.

### Claim 4 (depends on 2)

A wear-resistant sliding member comprising: a backing metal layer of a steel plate optionally having a surface plated with copper, and a sliding alloy layer of claim 2.

### Claim 5

A sintered copper alloy of a sliding-contact material having superior properties of anti-seizure resistance, wear resistance and corrosion resistance consisting essentially of 10 to 35 wt % of zinc, 2 to 20 wt % of lead, 1 to 10 wt % Ni, 0.1 to 1 wt % B, with at least part of said Ni and B forming Ni--B compound, and balance of copper and unavoidable impurities.

### Claim 6 (depends on 5)

A sintered copper alloy of a sliding-contact material according to claim 5, wherein the copper alloy further comprises 0.5 to 10 wt % of tin.

### Claim 7 (depends on 5)

A sliding-contact member comprising:
a backing metal layer of a steel plate optionally having a surface plated with copper, and a sintered copper alloy layer of a sliding-contact material defined in claim 5.

### Claim 8 (depends on 6)

A sliding-contact member comprising:
a backing metal layer of a steel plate optionally having a surface plated with copper, and a sintered copper alloy layer of a sliding-contact material defined in claim 6.