Wear-resistant copper-base alloy

Patent metadata

Field	Value
Publication number	US-10260128-B2
Application number	US-201715430707-A
Country	US
Kind code	B2
Filing date	Feb 13, 2017
Priority date	Mar 4, 2016
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

Provided is a copper-base alloy with excellent wear resistance. The wear-resistant copper-base alloy includes, by mass %: 5.0 to 30.0% nickel; 0.5 to 5.0% silicon; 3.0 to 20.0% iron; less than 1.0% chromium; less than or equal to 5.0% niobium; less than or equal to 2.5% carbon; 3.0 to 20.0% of at least one element selected from the group consisting of molybdenum, tungsten, and vanadium; 0.5 to 5.0% manganese and/or 0.5 to 5.0% tin; balance copper; and inevitable impurities, and has a matrix and hard particles dispersed in the matrix, when niobium is contained, the hard particles contain niobium carbide and at least one compound selected from the group consisting of Nb—C—Mo, Nb—C—W, and Nb—C—V around the niobium carbide, and when niobium is not contained, the hard particles contain at least one compound selected from the group consisting of molybdenum carbide, tungsten carbide, and vanadium carbide.

First claim

What is claimed is:

1. A wear-resistant copper-base alloy comprising, by mass %:
5.0 to 30.0% nickel;
0.5 to 5.0% silicon;
3.0 to 20.0% iron;
less than 1.0% chromium;
less than or equal to 5.0% niobium;
less than or equal to 2.5% carbon;
3.0 to 20.0% of at least one element selected from the group consisting of molybdenum, tungsten, and vanadium;
0.5 to 5.0% manganese and/or 0.5 to 5.0% tin;
balance copper; and
inevitable impurities,
wherein:
the wear-resistant copper-base alloy has a matrix and hard particles dispersed in the matrix,
when niobium is contained, the hard particles contain niobium carbide and at least one compound selected from the group consisting of Nb—C—Mo, Nb—C—W, and Nb—C—V around the niobium carbide, and
when niobium is not contained, the hard particles contain at least one compound selected from the group consisting of molybdenum carbide, tungsten carbide, and vanadium carbide.

2. The wear-resistant copper-base alloy according to claim 1 , wherein
a hardness of the matrix is 200 to 400 HV,
a hardness of the hard particles is 500 to 1200 HV, and
an area rate of the hard particles relative to a total area of the matrix and the hard particles is 5 to 50%.

3. A method comprising forming a cladding by applying the wear-resistant copper-base alloy according to claim 1 to a target.

4. The wear-resistant copper-base alloy according to claim 1 , which forms a cladding layer.

5. A method comprising applying the wear-resistant copper-base alloy according to claim 1 to a material to be used in a valve gear member or a sliding member for an internal combustion engine.

6. A method comprising forming a cladding by applying the wear-resistant copper-base alloy according to claim 2 to a target.

7. The wear-resistant copper-base alloy according to claim 2 , which forms a cladding layer.

8. A method comprising applying wear-resistant copper-base alloy according to claim 2 to a material to be used in valve gear member or a sliding member for an internal combustion engine.

Assignees

• Toyota Motor Co Ltd

Inventors

• Shinohara Nobuyuki
• Ando Kimihiko
• AOYAMA Hironori

Classifications

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2301/00

  Using particular materials · CPC title

• F01L5/00

  Slide valve-gear or valve-arrangements (with pure rotary or oscillatory movement F01L7/00) · CPC title

• C22C9/06 Primary

  with nickel or cobalt as the next major constituent · CPC title

• F01L3/04

  Coated valve members or valve-seats · CPC title