Brake disk
A gray cast iron brake disk has a thermally applied wear-reducing surface coating containing chromium and/or tungsten carbides. The surface coating has a roughness reduced to about 0.5 to 1 μm to shorten a wearing-in period.
1. A brake disk comprising:
a friction surface; and
a surface coating on the friction surface, the surface coating including carbide particles projecting from the surface thereof and having a roughness of less than 0.5 μm.
2. The brake disk according to claim 1 , wherein the surface coating is formed by finish-machining an initial surface coating to reduce the height of the carbide particles projecting therefrom to said roughness.
3. The brake disk according to claim 1 , wherein the surface coating is formed by finely grinding, barrel-finishing, lapping, honing, ultrasonically grinding or ultrasonically lapping an initial surface coating to reduce the height of the carbide particles projecting therefrom to said roughness.
4. The brake disk according to claim 1 , wherein the brake disk is composed of gray cast iron or of carbon fiber-reinforced plastic.
5. A brake disk comprising:
a friction surface; and
a surface coating on the friction surface, the surface coating including carbide particles projecting from the surface thereof and having a roughness defined by said carbide particles of less than 0.5 μm.
6. The brake disk according to claim 5 , wherein the surface coating is formed by finish-machining an initial surface coating to reduce the height of the carbide particles projecting therefrom to said roughness.
7. The brake disk according to claim 5 , wherein the surface coating is formed by finely grinding, barrel-finishing, lapping, honing, ultrasonically grinding or ultrasonically lapping an initial surface coating to reduce the height of the carbide particles projecting therefrom to said roughness.
8. The brake disk according to claim 5 , wherein the brake disk is composed of gray cast iron or of carbon fiber-reinforced plastic.