Metal treatment – Compositions – Heat treating
Patent
1981-08-04
1984-05-15
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
75123B, 75123J, 75123L, C22C 3812, C22C 3826
Patent
active
044486170
ABSTRACT:
A steel for use in a vehicle suspension spring having a good sag-resistance comprising by weight 0.50-0.80% carbon, 1.50-2.50% silicon, 0.50-1.50% manganese, a member or members selected from a group consisting of 0.05-0.50% vanadium, 0.05-0.50% niobium and 0.05-0.50% molybdenum, the remainder being iron together with impurities. The steel may further contain a member or members selected from a group consisting of 0.0001-0.01% boron and 0.20-1.00% chromium, and not greater than 0.0008% nitrogen.
REFERENCES:
patent: 3528088 (1970-09-01), Seghezzi et al.
patent: 4336081 (1982-06-01), Hijikata et al.
patent: 4409026 (1983-10-01), Yamada 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 Strengthened 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.
Kobayashi Ryohei
Kurimoto Mamoru
Ozone Toshio
Yamamoto Toshiro
Aichi Steel Works Ltd.
Chuo Hatsujo Kabushiki Kaisha
Skiff Peter K.
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