Process of preparing steel coil spring

Details Process of preparing steel coil spring Process of preparing steel coil spring

1981-01-12

1982-06-22

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 123, 148150, C21D 806, C21D 902

Patent

active

043360815

ABSTRACT:
High-strength, high-workability steel for cold plastic working, obtained by subjecting a hardenable carbon steel to rapid high-frequency induction heating, quenching it, rapidly heating it by high-frequency induction to a temperature of 300.degree.-600.degree. C., and rapidly cooling it. This steel can be cold plastic worked, and then reheated at 300.degree.-500.degree. C. for 30-60 minutes, to obtain a steel having a high elastic limit.

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patent: 3929524 (1975-12-01), Filatov et al.
patent: 3936324 (1976-02-01), Uchida et al.
patent: 4050959 (1977-09-01), Nakaoka

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