Metal treatment – Compositions – Heat treating
Patent
1975-06-12
1976-12-14
Steiner, Arthur J.
Metal treatment
Compositions
Heat treating
75123E, 75123J, 75124, 148 12F, C22C 3812
Patent
active
039973727
ABSTRACT:
A low alloy steel having a composition containing columbium, vanadium and silicon, advantageously in specified ranges of content, has demonstrated superior mechanical properties, comprising yield strength above 80 ksi, excellent toughness including good impact strength at low temperatures, and good formability evidenced by a suitably high percent elongation. The steel in its preferred embodiments includes a significant amount of manganese, and is economically producible in as-hot-rolled state to achieve the stated properties, subject to attainment of even higher strength by an aging treatment.
REFERENCES:
patent: 3661537 (1972-05-01), Aronson et al.
patent: 3666570 (1972-05-01), Korchynsky et al.
patent: 3897279 (1975-07-01), Shaughnessy et al.
patent: 3947293 (1976-03-01), Takechi et al.
Sekine, et al; "Effect of Nb or/and V Addition and the Amounts of Extracted Carbides on the Strengthening of Hot Rolled Steels," Jour. Iron U.S. Steel Inst. of Japan; 1970, vol. 56 pp. 569-590.
"The Development of Pearlite-Free, Precipitation-Hardening Structural Steels;" Stahl und Eisen, Bartholot et al., vol. 91(4), 2/18/1971, pp. 204-220.
Journal of the Iron and Steel Institute, 2/67 pp. 161,176,179-182.
Ballance John B.
Klems George J.
Matas Stephen J.
Mintus Raymond E.
Republic Steel Corporation
Steiner Arthur J.
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