Flat form spring, in particular disc or wave spring

Abstract

A flat form spring, in particular a disc spring or corrugated spring, includes a spring body made of a low-alloy steel which has a carbon content of more than 0.35% by weight and at most 0.75% by weight. The steel contains between 0.3 wt. % and 0.9 wt. % manganese (Mn) as an alloying element. The steel also contains chromium (Cr) as an alloying element with a weight proportion of between 0.3 wt. % and 1.5 wt. %. The steel further contains between 0.1% and 0.6% by weight of molybdenum (Mo) as an alloying element. In addition, the steel contains more than 0.4 wt. % and up to 8 wt. % nickel (Ni) as an alloying element. A flatform spring made in this way has an improved strength compared to conventional flatform springs without a loss of toughness compared to a spring made of conventional spring steels.

Dependencies are inferred from the claim text.