Brake element for a motor vehicle, and method for manufacturing a brake element

Patent metadata

Field	Value
Publication number	US-2025035175-A1
Application number	US-202418782968-A
Country	US
Kind code	A1
Filing date	Jul 24, 2024
Priority date	Jul 24, 2023
Publication date	Jan 30, 2025
Grant date	—

Abstract

A brake element for a motor vehicle, having a base body that is planar at least in areas, to the planar sides of which at least two build-up layers are applied in each case, at least in areas. The build-up layers form a surface which, in the mounted state of the brake element on the motor vehicle, is used as a friction surface for a brake pad. A first build-up layer is present that adjoins the base body, and a second build-up layer is applied to the first build-up layer. The second build-up layer is made of a composite of an iron alloy matrix with intercalated tungsten carbide particles or with intercalated titanium carbide particles. At least the first build-up layer is an iron alloy that is alloyed at least with molybdenum in a range of 3 to 20 weight percent.

First claim

What is claimed is:

1 . A brake element for a motor vehicle, the brake element comprising:
a base body that is planar at least in areas to planar sides of which at least two build-up layers are applied, at least in areas, the build-up layers forming a surface which, in a mounted state of the brake element on the motor vehicle, is used as a friction surface for a brake pad; a first build-up layer that adjoins the base body; and a second build-up layer being applied to the first build-up layer, the second build-up layer being made of a composite of an iron alloy matrix with intercalated tungsten carbide particles or with intercalated titanium carbide particles, wherein at least the first build-up layer is an iron alloy that is alloyed at least with molybdenum in a range of 3 wt % to 20 wt %.

2 . The brake element according to claim 1 , wherein the second build-up layer is also alloyed at least with molybdenum in a range of 3 wt % to 20 wt %.

3 . The brake element according to claim 1 , wherein the proportion of a volume of the intercalated tungsten carbide particles to a volume of the iron alloy matrix is in a range of 10% to 20%.

4 . The brake element according to claim 1 , wherein the proportion of a volume of the intercalated titanium carbide particles to a volume of the iron alloy matrix is in a range of 10% to 40%.

5 . The brake element according to claim 1 , wherein the iron alloy in the first build-up layer is made of an austenitic stainless steel having material properties corresponding to the material 1.4404 according to the DIN EN 10027-2 standard, or to the material 316L according to the AISI standard.

6 . The brake element according to claim 1 , wherein the iron alloy of the first build-up layer is made of a ferritic stainless steel having material properties corresponding to the material 1.4016 according to the DIN EN 10027-2 standard, or to the material 430L according to the AISI standard.

7 . The brake element according to claim 1 , wherein the first build-up layer, viewed substantially perpendicularly with respect to an areal extent of a planar side, has a thickness in a range of 50 μm to 350 μm.

8 . The brake element according to claim 1 , wherein the second build-up layer, viewed substantially perpendicularly with respect to an areal extent of a planar side, has a thickness in a range of 60 μm to 420 μm.

9 . The brake element according to claim 1 , wherein the iron alloy matrix in the second build-up layer is made of a material that has material properties corresponding to the material 1.4404 according to DIN EN 10027-2 standard, or to the material 316L according to the AISI standard.

10 . The brake element according to claim 1 , wherein the iron alloy matrix in the second build-up layer is made of a material that has material properties corresponding to the material 1.4016 according to the DIN EN 10027-2 standard, or to the material 430L according to the AISI standard.

Assignees

• Volkswagen Ag

Inventors

• Richter Stefan
• Behm Fabian
• Harke Markus
• Klimek Klaus Stefan

Classifications

• F16D2200/0021

  Steel · CPC title

• F16D2200/0065

  Inorganic, e.g. non-asbestos mineral fibres · CPC title

• F16D2200/0078

  laminated · CPC title

• F16D2200/0039

  Ceramics · CPC title

• F16D2200/0008

  Ferro · CPC title