US 11,718,886 B2
Method for producing a brake element, brake element
Ilija Bozovic, Malsch (DE); Karl-Heinz Linek, Remseck (DE); Karl-Otto Englert, Gundelsheim (DE); Laurent Le Barzic, Karlsruhe (DE); and Roland Raab, Wiesloch (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Feb. 22, 2021, as Appl. No. 17/181,717.
Prior Publication US 2022/0267873 A1, Aug. 25, 2022
Int. Cl. C22C 27/04 (2006.01); F16D 65/12 (2006.01); C21D 9/00 (2006.01); C21D 5/00 (2006.01); C22C 37/00 (2006.01)
CPC C21D 9/0068 (2013.01) [C21D 5/00 (2013.01); C22C 37/00 (2013.01); F16D 65/125 (2013.01); F16D 65/127 (2013.01); F16D 2200/0013 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for producing a brake element which has a friction portion and a fastening portion, comprising:
producing a blank with the friction portion and the fastening portion configured as one piece, with the fastening portion having a wall thickness of at least 1.5 mm and at most 4.5 mm, by a casting method from gray cast iron with lamellar graphite;
subjecting the blank to an austenitizing process at a predefined austenitizing temperature so as to produce an austenitized blank;
quenching the austenitized blank at a cooling rate of between 30° C. per minute and 50° C. per minute; and
subjecting the quenched austenitized blank to an austempering process at a predefined austempering temperature so as to produce the brake element.