Abstract: A brake disc for a motor vehicle is disclosed. The brake disc includes a substrate, in particular a grey cast iron substrate, at least one friction surface formed on the substrate and at least one cover layer applied at least to the at least one friction surface. The cover layer is harder and thinner than the substrate and color changes to enable identification are introduced in the cover layer by a pulsed laser.

Abstract: A method for producing a brake disc (BS) for a vehicle, with a main body (G) of a metal material, in particular gray cast iron, which has friction surfaces (R). The friction surfaces (R) are coated with a coating of tungsten carbide, chromium carbide, and nickel or of tungsten carbide, cobalt and nickel and after-treated by carbonizing, carbonitriding, case hardening, gas nitriding, oxide nitriding, gas nitro carburizing, plasma nitriding, plasma oxidizing, borating, plasma carborating or plasma borating.

Abstract: The invention relates to a brake disc (BS) for a vehicle, comprising a main body (G) that is made of a metal material, particularly gray cast iron, which has friction surfaces (R) having a coating (B) made of a hard material. According to the invention, the coating (B) is formed from carbides, ceramics, cermet or metals.

Abstract: A friction disc (2) with an anti-abrasion layer (1) and integrated wear indication, the friction disc (2) having a friction surface (2?) which is completely covered by the anti-abrasion layer (1). At least one indication surface element (3) which occupies a part of the friction surface (2?) and differs from at least one of the components friction surface (2?) and anti-abrasion layer (1) of the friction disc (2) in at least one of the features coloring and texture is provided between the anti-abrasion layer (1) and the friction disc (2). Compositions of the anti-abrasion layer (1) of the friction disc (2).

Abstract: The invention relates to a method for producing a brake disc (BS) for a vehicle, comprising a main body (G) of a metal material, in particular gray cast iron, which has friction surfaces (R). The friction surfaces (R) are after-treated according to the invention by carboring, carbonitriding, case hardening, gas nitriding, oxide nitriding, gas nitro carburizing, plasma nitriding, plasma oxidizing, borating, plasma carborating or plasma borating.

Abstract: The invention relates to a brake disc (BS) for a vehicle, comprising a main body (G) that is made of a metal material, particularly gray cast iron, which has friction surfaces (R) having a coating (B) made of a hard material. According to the invention, the coating (B) is formed from carbides, ceramics, cermet or metals.

Abstract: Composite brake disc, comprising cast iron carrier disc (1) and at least one friction ring (2) of the different material rigidly joined therewith, which covers over essentially the area opposite to the brake pad, wherein the friction ring (2) is comprised of a friction material, which exhibits a higher corrosion resistance than the cast iron carrier disc (1), and process for production of a composite brake disc by joining a cast iron carrier disc (1) with at least one friction ring (2) by friction welding or by casting the carrier disc (1) thereon.