Thyssen Krupp Ag

Thyssenkrupp Federn Und Stabilisatoren Gmbh

Heinz-Georg Gabor

Dieter Lechner

Marcel Gross

Marco Roland

Dieter Brier

Marcel Groß

Bertram Kind

Wolfgang Kowatsch

Martin Schmidt

A process for producing a spring or torsion bar from a steel wire by hot forming may involve providing a steel wire; thermomechanically forming the steel wire; cooling the steel wire thermomechanically; cutting the steel wire to length to give rods; heating the rods; hot forming the rods; and tempering the rods to give a spring or torsion bar, comprising quenching the rods to give a spring or torsion bar to a first cooling temperature, reheating the spring or torsion bar to a first annealing temperature, and cooling the spring or rod to a second cooling temperature. Further, in some examples, the cooling of the steel wire may be cooled to a temperature below a minimum recrystallization temperature such that at least a partly ferritic-pearlitic structure is established in the steel wire.

Method for producing hot-formed steel springs

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Wetter, Germany

Heinz-Georg Gabor