Wear-resistant copper-based alloy, cladding alloy, cladding layer, and valve system member and sliding member for internal combustion engine

Patent metadata

Field	Value
Publication number	US-10167533-B2
Application number	US-201615231051-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Aug 7, 2015
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A wear-resistant copper-based alloy includes: at least one selected from the group made of molybdenum, tungsten, and vanadium and niobium carbide; chromium in an amount of less than 1.0% in terms of wt %; and a matrix and hard particles dispersed in the matrix, in which the hard particles include niobium carbide and at least one selected from the group made of Nb—C—Mo, Nb—C—W, and Nb—C—V around the niobium carbide.

First claim

What is claimed is:

1. A wear-resistant copper-based alloy comprising:
at least one selected from the group consisting of molybdenum, tungsten, and vanadium;
niobium carbide;
copper;
chromium in an amount of less than 1.0% in terms of wt %; and
a matrix and hard particles dispersed in the matrix,
wherein the hard particles comprise niobium carbide and at least one selected from the group consisting of Nb—C—Mo oxide, Nb—C—W oxide, and Nb—C—V oxide around the niobium carbide.

2. The wear-resistant copper-based alloy according to claim 1 , wherein
the wear-resistant copper-based alloy comprises, in terms of wt %:
nickel: 5.0% to 30.0%;
silicon: 0.5% to 5.0%;
iron: 3.0% to 20.0%;
chromium: less than 1.0%;
niobium carbide: 0.01% to 5.0%;
at least one selected from the group consisting of molybdenum, tungsten, and vanadium: 3.0% to 20.0%; and
the balance is copper and unavoidable impurities.

3. The wear-resistant copper-based alloy according to claim 1 , wherein
the wear-resistant copper-based alloy does not include chromium.

4. The wear-resistant copper-based alloy according to claim 1 , wherein
the amount of chromium is more than 0% and less than 1.0%.

5. The wear-resistant copper-based alloy according to claim 1 , wherein
an amount of cobalt is less than 2.0%.

6. The wear-resistant copper-based alloy according to claim 5 , wherein
an amount of molybdenum is 10% or less.

7. An object comprising a cladding layer, the cladding layer being made of the wear-resistant copper-based alloy according to claim 1 .

8. A valve system member for an internal combustion engine, which is made of the wear-resistant copper-based alloy according to claim 1 .

9. A sliding member for an internal combustion engine, which is made of the wear-resistant copper-based alloy according to claim 1 .

Assignees

• Toyota Motor Co Ltd
• Toyota Chuo Kenkyusho Kk

Inventors

• Kawasaki Minoru
• Shinohara Nobuyuki
• Fujita Takehisa
• AOYAMA Hironori
• Yamamoto Yasuhiro
• Oshima Tadashi
• Kato Hajime
• Tanaka Kouji
• Saito Takashi

Classifications

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2301/00

  Using particular materials · CPC title

• C22C9/06 Primary

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

• C23C24/103

  Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides · CPC title

• C22C32/0047

  with carbides, nitrides, borides or silicides as the main non-metallic constituents · CPC title