Method for manufacturing a brake disc and brake disc for disc brakes
AssigneeFreni Brembo S.p.A.
InventorsFABIANO CARMINATI, PAOLO VAVASSORI, SIMONE BIONDO
Life of this patent
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Abstract
A method for manufacturing a brake disc may have the following operating steps: a) preparing a brake disc, with a braking band and provided with two mutually opposite braking surfaces; b) depositing on the disc a layer of chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form forming a base protective coating; and c) depositing over the base protective coating a material in particulate form with the tungsten carbide (WC) and cobalt (Co) forming a surface protective coating. Both protective coatings are created with HVOF (High Velocity Oxygen Fuel), HVAF (High Velocity Air Fuel) or KM (Kinetic Metallisation) technique.
Claims19
1-18. (canceled)
A method for manufacturing a brake disc comprising the following operating steps:
- a) preparing a brake disc, comprising a braking band and provided with two mutually opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc, the braking band being made of aluminium or aluminium alloy, or being made of grey cast iron or steel;
- b) depositing on the disc a layer of chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form with HVOF (High Velocity Oxygen Fuel) technique, HVAF (High Velocity Air Fuel) technique or KM (Kinetic Metallisation) technique forming a base protective coating that covers at least one of the two braking surfaces of the braking band in direct contact with them;
- and
- c) depositing over said base protective coating a material in particulate form consisting of tungsten carbide (WC) and cobalt (Co) with HVOF (High Velocity Oxygen Fuel) technique, HVAF (High Velocity Air Fuel) technique or KM (Kinetic Metallisation) technique forming a surface protective coating that covers at least one of the two braking surfaces of the braking band.
A brake disc for a disc brake, comprising a braking band, provided with two mutually opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc, the braking band being made of aluminium or aluminium alloy, or being made of grey cast iron or steel;
- said disc being provided with:
- a base protective coating that covers at least one of the two braking surfaces of the braking band, said base protective coating being constituted by chromium carbide (Cr3C2) and nickel-chromium (NiCr) and being obtained by depositing, directly on the disc, chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form with HVOF (High Velocity Oxygen Fuel) technique, HVAF (High Velocity Air Fuel) technique or KM (Kinetic Metallisation) technique;
- and
- a surface protective coating that covers at least one of the two braking surfaces of the braking band, said surface protective coating being constituted by tungsten carbide (WC) and cobalt (Co) and being obtained by depositing, on the base protective coating, tungsten carbide (WC) and cobalt (Co) in particulate form with HVOF (High Velocity Oxygen Fuel) technique, HVAF (High Velocity Air Fuel) technique or KM (Kinetic Metallisation) technique.
Dependencies are inferred from the claim text.