Sintered friction material and method for producing sintered friction material

Patent metadata

Field	Value
Publication number	US-12066071-B2
Application number	US-201917290152-A
Country	US
Kind code	B2
Filing date	Oct 28, 2019
Priority date	Oct 31, 2018
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A sintered friction material, in which a content of a copper component is 0.5 mass % or less, is provided. The sintered friction material includes a titanate and a metal material other than copper, as a matrix. A content of the metal material other than copper is 10.0 volume % to 34.0 volume %. A method for manufacturing a sintered friction material is provided. The method includes a mixing step of mixing raw materials containing a titanate and a metal material other than copper, a molding step of molding the raw materials mixed in the mixing step, and a sintering step of sintering, at 900° C. to 1300° C., a molded product molded in the molding step. In the sintered friction material, the titanate and the metal material other than copper form a matrix, and a content of the metal material other than copper is 10.0 volume % to 34.0 volume %.

First claim

The invention claimed is:

1. A sintered friction material, in which a content of a copper component is 0.5 mass % or less, comprising:
a titanate and a metal material other than copper, as a matrix, wherein
a content of the titanate is 8.0 volume % to 60.0 volume %,
a content of the metal material other than copper is 10.0 volume % to 34.0 volume %,
the titanate contains a titanate complex, and
the titanate is in a sintered state.

2. The sintered friction material according to claim 1 , wherein
the titanate further contains at least one salt selected from a group consisting of an alkali metal titanate and an alkaline earth metal titanate.

3. The sintered friction material according to claim 1 , wherein
the titanate further contains at least one salt selected from a group consisting of potassium titanate, sodium titanate, calcium titanate, lithium potassium titanate, and potassium magnesium titanate.

4. The sintered friction material according to claim 1 , wherein
the metal material other than copper contains an iron-based material, and a content of the iron-based material is 8.0 volume % to 32.0 volume %.

5. The sintered friction material according to claim 1 , wherein
the metal material other than copper contains tungsten, and a content of tungsten is 1.0 volume % to 15.0 volume %.

6. A method for manufacturing the sintered friction material according to claim 1 , comprising:
a mixing step of mixing raw materials containing the titanate and the metal material other than copper;
a molding step of molding the raw materials mixed in the mixing step; and
a sintering step of sintering, at 900° ° C. to 1300° C., a molded product molded in the molding step, wherein
in the sintered friction material, the titanate and the metal material other than copper form the matrix, and a content of the metal material other than copper is 10.0 volume % to 34.0 volume %.

7. The sintered friction material according to claim 4 , wherein
the metal material other than copper further contains tungsten, and a content of tungsten is 1.0 volume % to 15.0 volume %.

8. The sintered friction material according to claim 1 , wherein
the content of the titanate is 12.0 volume % to 55.0 volume %.

9. The sintered friction material according to claim 2 , wherein
the content of the titanate is 12.0 volume % to 55.0 volume %.

10. The sintered friction material according to claim 3 , wherein
the content of the titanate is 12.0 volume % to 55.0 volume %.

11. The sintered friction material according to claim 1 , wherein
the titanate contains potassium titanate and lithium potassium titanate.

12. The sintered friction material according to claim 11 , wherein
the content of the titanate is 25.0 volume % to 37.0 volume %.

13. The sintered friction material according to claim 1 , wherein
the titanate contains lithium potassium titanate and potassium magnesium titanate.

Assignees

• Akebono Brake Ind

Inventors

• NIHEI Marina
• Takahashi Hideaki
• Kato Masanori
• Onodera Katsuhiro
• Ueno Atsushi
• Takada Eri

Classifications

• F16D49/00

  Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like (similar clutches F16D13/10) · CPC title

• F16D2200/0082

  Production methods therefor · CPC title

• F16D2200/0043

  Ceramic base, e.g. metal oxides or ceramic binder · CPC title

• F16D2200/0026

  Non-ferro · CPC title

• C04B2235/65

  Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes · CPC title