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US 12,173,764 B2Granted
Brake disc provided with protection from wear and corrosion and method for production thereof
AssigneeC4 Laser Technology GmbH
InventorTilo Steinmeier
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AssigneeC4 Laser Technology GmbH
InventorTilo Steinmeier
Estimating the term…
The present invention concerns the field of vehicle technology and industrial-plant technology and relates to a brake disc provided with protection from wear and corrosion and to a method for production thereof. The known solutions have the disadvantage that the coating for providing protection from corrosion and wear is applied to the frictional surfaces of the brake disc and is rubbed off straight away during the first braking operations. The present invention addresses the problem of providing a brake disc that has improved and durable protection from corrosion and wear. The significantly improved properties of the brake disc in terms of protection from corrosion and wear are achieved according to the invention by at least the region of the frictional surfaces (2) having an AlSi-based diffusion layer (3), which has a layer thickness of 0.1 mm to 0.6 mm and is formed in the process of interaction with the steel or grey cast iron of the metal main body (1). The brake disc according to the invention can be used for example in vehicles or as a braking system for industrial brakes or in wind turbines.
A brake disk having a main metallic body (1) made of steel or gray iron, having at least one region with formed friction surfaces (2) and at least one region with a formed contact surface (6) for securing of the brake disk, wherein a diffusion layer (3) formed from iron, aluminum and silicon present within the main metallic body (1) at least in the region of the friction surfaces (2) has a layer thickness of 0.1 mm to 0.6 mm and is formed collectively with the steel or gray iron of the main metallic body (1) via diffusion processes, and in which the diffusion layer (3) is graded from iron and aluminum, and in which the gradated diffusion layer (3) is formed in such a way that the proportion of iron decreases continuously related toward the friction surface (2) of the gradated diffusion layer (3) and the proportion of aluminum increases continuously related toward the friction surface (2) of the gradated diffusion layer (3), wherein silicon is distributed homogeneously in the gradated diffusion layer (3).
Dependencies are inferred from the claim text.