US 12,215,751 B2
Flat form spring, in particular disc or wave spring
Peter Buchhagen, Schorndorf (DE)
Assigned to CHRISTIAN BAUER GMBH + CO. KG, Welzheim (DE)
Filed by CHRISTIAN BAUER GMBH + CO. KG, Welzheim (DE)
Filed on Mar. 14, 2020, as Appl. No. 16/819,084.
Claims priority of application No. 10 2019 203 558.2 (DE), filed on Mar. 15, 2019.
Prior Publication US 2020/0292022 A1, Sep. 17, 2020
Int. Cl. F16F 1/02 (2006.01); C22C 38/04 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); F16F 1/32 (2006.01)
CPC F16F 1/021 (2013.01) [C22C 38/04 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); F16F 1/328 (2013.01); F16F 2224/0208 (2013.01); F16F 2224/0258 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A flat form spring comprising:
a spring body made of a low-alloy steel including:
between 0.65% by weight and 0.7% by weight of carbon,
between 0.35% and 0.5% by weight of manganese,
between 0.45% and 0.6% by weight of chromium,
between 0.15% and 0.25% by weight of molybdenum,
between 0.55% by weight and 0.75% by weight of nickel,
between 0% by weight and less than 0.2% by weight of tungsten, iron,
between 0.2% by weight and 0.35% by weight of silicon,
between 0% by weight and 0.025% by weight of phosphorus,
between 0% by weight and 0.05% by weight of sulfur,
between 0% by weight and less than 0.05% per weight of aluminum,
between 0% by weight and less than 0.25% per weight of copper, and
wherein the low-alloy steel is bainitic quenched and tempered.