Spring steel having a good sag-resistance and a good hardenabili

Details Spring steel having a good sag-resistance and a good hardenabili Spring steel having a good sag-resistance and a good hardenabili

1982-08-06

1985-10-01

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75123L, 75126C, 75126Q, 75128A, 75128C, C22C 3826, C22C 3812

Patent

active

045444064

ABSTRACT:
A spring steel having a good sag-resistance and a good hardenability comprises by weight 0.5-0.8% carbon, 1.5-2.5% silicon, 1.6-2.5% manganese and a member or members selected from a group consisting of 0.05-0.5% vanadium, 0.05-0.5 niobium and 0.05-0.5% mobybdenum, the remainder being iron together with impurities. The steel may further contain a member or members selected from a group consisting 0.0005-0.01% boron, 0.2-1.0% chromium, 0.2-2.0% nickel and not greater than 0.3% rare-earth elements and/or a member or members selected from a group consisting of 0.03-0.1% aluminum, 0.02-0.1% titanium and 0.02-0.1% zirconium.

REFERENCES:
patent: 3726724 (1973-04-01), Davies et al.
patent: 4448617 (1984-05-01), Yamamoto et al.
Dr. Toshiro Yamamoto et al., "(557) Role of Si and Cr in Spring Steel for High Stress Use", Mar. 5, 1982, Tetsu to Hagane, Journal of the Iron and Steel Institution of Japan, p. '81-S583.
Dr. Toshiro Yamamoto et al., "(558) Precipitation Strenghened Spring Steel for High Stress Use", Mar. 5, 1981, Tetsu to Hagane, Journal of the Iron and Steel Institution of Japan, p. '81-S584.
Toshiro Yamamoto et al., "Precipitation Strengthened Spring Steel for Automobile Suspensions", Feb. 22-26, 1982, Sae Technical Paper Series 820129.

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