Loading patent…
AssigneeOerlikon Surface Solutions AG, PfäFfikon
InventorsRolf Heinecke, Franco Arosio, Ingo Lange
Estimating the term…
Method for producing a mechanically and preferably machined cast iron or grey cast iron surface, in particular on a brake disc, with increased wear and corrosion resistance, characterized in that said surface is subjected to a water jet treatment—usually according to the so-called fluid jet process, which is adjusted so that it completely or at least partially clears the cavities opened by the machining, which contain a graphite inclusion surrounded by the basic structure, so that in the latter case the level of the graphite inclusion lies below the outer surface of the basic structure surrounding the cavity, whereupon a diffusion layer is applied by nitrocarburizing and an oxide layer is applied on the diffusion layer.
A method for producing a mechanically and machined cast iron or grey cast iron surface on a brake disc, resulting in increased wear and corrosion resistance, comprising:
A method of using a pulsed water jet process, comprising:
A brake disc made from grey cast iron having at least at its friction surfaces cavities opened by prior machining and originally filled with graphite, wherein at least an upper fourth of the cavities is fully or partially cleared from the graphite that was in it in a manner that does not cause deposit of a solid blasting material or ash within the cavities and the brake disc is nitrocarburized, and wherein a base structure surrounding the cavities has a roughness Ra<5 μm and Rz<12 μm and is not eroded.
Dependencies are inferred from the claim text.