High strength spring

Details High strength spring High strength spring

1993-02-25

1993-11-02

Yee, Deborah

Metal treatment

Having portions of differing metallurgical properties or...

Spring

148333, C22C 3822

Patent

active

052580822

ABSTRACT:
A spring steel containing 0.35 to 0.50% of carbon is refined to the hardness of .phi. 2.50 to 2.70 mm in Brinell indentation diameter (HBD) by rapid cooling for quenching and tempering. This spring steel is subjected to warm shot peening at a temperature of 150 to 300.degree. C. (423 to 573K) by using long-lived practical shots with the normal hardness of .phi. 2.65 to 2.80 mm in HBD, whereupon a high-strength spring is obtained having a compressive residual stress in its surface and enjoying the maximum shearing stress of 110 to 135 kgf/mm.sup.2 (1080 to 1325 MPa).

REFERENCES:
patent: 3756870 (1973-09-01), Kasper et al.
patent: 4533402 (1985-08-01), Ohno et al.
patent: 4544406 (1985-10-01), Yamamoto et al.
patent: 4795609 (1989-01-01), Saka et al.
patent: 4909866 (1990-03-01), Abe et al.
patent: 5118469 (1992-06-01), Abe et al.
Japanese Industrial Standard (JIS) No. G4801-1984; pp. 1-12, Translated and Published by Japanese Standards Association.
1991 SAE Handbook, vol. 1, Cooperative Engineering Program, (SAE 9260); Society of Automotive Engineers, Inc., Warrendale, Pa.

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