Steel wire for a spring and method for the production thereof

Details Steel wire for a spring and method for the production thereof Steel wire for a spring and method for the production thereof

1988-10-19

1990-07-03

Zimmerman, John J.

Metal treatment

Compositions

Heat treating

148 12R, 148320, C21D 902

Patent

active

049388118

ABSTRACT:
A steel wire, and a method for producing the same, for use in the manufacture of a chassis or suspension automotive spring having a high sag resistance. In accordance with the invention, after a heat treatment is effected, strain is imposed to the steel wire so as to thereby improve the sag resistance. The strain may be imposed either during tempering or at room temperature following tempering.

REFERENCES:
patent: 3196052 (1965-07-01), Hann
patent: 3847002 (1974-11-01), Suzuki et al.
patent: 4161415 (1979-07-01), Van den Sype et al.
patent: 4174981 (1979-11-01), Cassell
patent: 4180418 (1979-12-01), Pavlitsch et al.
patent: 4336081 (1982-06-01), Hijikata et al.
patent: 4407683 (1983-10-01), Hijikata et al.
patent: 4483722 (1984-11-01), Freeman
patent: 4574016 (1986-03-01), Yamamoto et al.
patent: 4711675 (1987-12-01), Yamamoto et al.
patent: 4770721 (1985-09-01), Yamamoto et al.

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