# US 5,344,507 A · Wear-resistant aluminum alloy and method for working thereof

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

- Number: US 5,344,507 A
- Document ID: US5344507A
- Status: Granted
- Kind: A
- Application number: 07/851,932
- Filed: 1992-03-16
- Granted: 1994-09-06
- Earliest claimed: 1991-03-14
- Assignees: Tsuyoshi Masumoto; Yoshida Kogyo K.K.; Teikoku Piston Ring Co., Ltd.
- Inventors: Tsuyoshi Masumoto; Akihisa Inoue; Kazuhiko Kita; Hitoshi Yamaguchi
- Web page: https://patentgrep.com/patent/US5344507A

## CPC

- F02B 75/34: Ultra-small engines, e.g. for driving models
- B22F 3/1216: {Container composition}
- C22C 1/0416: {Aluminium-based alloys}
- C22C 9/00: Alloys based on copper
- C22C 21/02: with silicon as the next major constituent
- C22C 45/08: with aluminium as the major constituent
- F02F 1/00: Cylinders; Cylinder heads
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES

## Abstract

An aluminum-alloy, which is wear-resistant and does not wear greatly the opposed cast iron or steel, and which can be warm worked. The alloyings the following composition and structure. Composition: Al.sub.a Si.sub.b M.sub.c X.sub.d T.sub.e (where M is at least one element selected from the group consisting of Fe, Co and. Ni; X is at least one element selected from the group consisting of Y, Ce, La and Mm (misch metal); Y is at least one element selected from the group consisting of Mn, Cr, V, Ti, Mo, Zr, W, Ta and Hf; a=50-85 atomic %, b=10-49 atomic %, c=0.5-10 atomic %, d=0.5-10 atomic %, e=0-10 atomic %, and a+b+c+d+e=100 atomic %. Structure: super-saturated face-centered cubic crystals and fine Si precipitates.

## Claims

### Claim 1

A wear-resistant aluminum-alloy, which has a hardness of 340-400 Hv and has a composition expressed by Al.sub.a Si.sub.b M.sub.c X.sub.d T.sub.e (M is at least one element selected from the group consisting of Fe, Co and Ni; X is at least one element selected from the group consisting of Y, Ce, La and Mm (misch metal); T is at least one element selected from the group consisting of Mn, Cr, V, Ti, Mo, Zr, W, Ta and Hf; a=50-85 atomic %, b=10-49 atomic %, c=0.5-10 atomic %, d=0.5-10 atomic %, e=0-10 atomic %, and a+b+c+d+e=100 atomic %), and which has a structure of super-saturated face centered cubic crystals and fine Si precipitates from 0.1 to 10 .mu.m in size and is free from intermetallic compounds.

### Claim 2 (depends on 1)

A wear-resistant aluminum-alloy according to claim 1, wherein said alloy is a melt-quenched ribbon.

### Claim 3 (depends on 1)

A wear-resistant aluminum-alloy according to claim 1, wherein said alloy is warm-worked.

### Claim 4 (depends on 2, 3)

A wear resistant aluminum-alloy according to claim 2 or 3, wherein said alloy is warm-worked.

### Claim 5 (depends on 4)

Sliding members consisting of a wear-resistant aluminum-alloy according to claim 4, which is in slidable contact with an opposed member which consists of steel or cast iron.

### Claim 6

A method for working a wear-resistant aluminum-alloy which has a composition expressed by Al.sub.a Si.sub.b M.sub.c X.sub.d T.sub.e (M is at least one element selected from the group consisting of Fe, Co and Ni; X is at least one element selected from the group consisting of Y, Ce, La and Mm (misch metal); T is at least one element selected from the group consisting of Mn, Cr, V, Ti, Mo, Zr, W, Ta and Hf; a=50-85 atomic %, b=10-49 atomic %, c=0.5-10 atomic %, d=0.5-10 atomic %, e=0-10 atomic %,and a+b+c+d+e=100 atomic %), and which has a structure of super-saturated face centered cubic crystals and fine Si precipitates from 0.1 to 10 .mu.m in size and is free from intermetallic compounds, the method comprising subjecting the aluminum alloy to warm working at a temperature of from 300.degree. to 400.degree. C. to yield an alloy having a structure of super-saturated face centered cubic crystals and fine Si precipitates from 0.1 to 10 .mu.m in size and free from intermetallic compounds.

### Claim 7 (depends on 6)

A method according to claim 6, wherein atomized powder is subjected to extrusion of pressing at a temperature of from 300.degree. to 400.degree. C.

### Claim 8 (depends on 7)

A method according to claim 7, wherein said atomized powder is enclosed and sealed in a can under vacuum and is then pressed into a billet, which is then subjected to said extrusion or pressing.