Friction brake body for a friction brake of a motor vehicle, method for producing a friction brake
AssigneesRobert Bosch GmbH, Buderus Guss Gmb
InventorsIlja Potapenko, Christian Schnatterer, Thomas Kiedrowski, Kangjian Wu, Simon Loskyll, Sebastian Hellfeier
Life of this patent
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Abstract
The disclosure relates to a friction brake body for a friction brake of a motor vehicle, in particular a brake disc, wherein the friction brake body comprises a base body made from gray cast iron, and at least one wear resistant layer formed at least in areas on the base body. The wear resistant layer is a laser alloyed or laser dispersed edge layer of the base body and comprises at least one additive.
Claims8
A process for producing a friction brake element for a friction brake of a motor vehicle, comprising:
- making a main element of the friction brake element from gray cast iron;
- and
- providing the main element, at least in regions, with at least one antiwear layer, wherein the at least one antiwear layer is produced by one of laser alloying and laser dispersion of at least one additive with or in a surface layer of the main element,
- wherein
- chromium or ferrochromium and at least one further carbide-forming element selected from a group consisting of titanium, niobium, vanadium, tungsten, and molybdenum, are used as the at least one additive;
- the surface layer of the main element is melted to form a melt and the melt is subsequently provided with the at least one additive during the laser alloying or laser dispersion;
- and
- more chromium is added to the melt than an amount of free carbon available for formation of chromium carbide in the melt in order to ensure a corrosion resistance of the at least one antiwear layer.
A process for producing a friction brake element for a friction brake of a motor vehicle, comprising:
- making a main element of the friction brake element from gray cast iron;
- providing the main element, at least in regions, with at least one antiwear layer, wherein the at least one antiwear layer is produced by one of laser alloying and laser dispersion of at least one additive with or in a surface layer of the main element;
- cooling the surface layer after the laser alloying or laser dispersion;
- and
- carrying out at least one of a laser hardening, an induction hardening, and a flame hardening after cooling.
A process for producing a friction brake element for a friction brake of a motor vehicle, comprising:
- making a main element of the friction brake element from gray cast iron;
- providing the main element, at least in regions, with at least one antiwear layer, wherein the at least one antiwear layer is produced by one of laser alloying and laser dispersion of at least one additive with or in a surface layer of the main element;
- cooling the surface layer after the laser alloying or laser dispersion;
- and
- heat treating at least the surface layer at least once after cooling.
Dependencies are inferred from the claim text.