Ultra high strength, secondary hardening steels with superior to

Details Ultra high strength, secondary hardening steels with superior to Ultra high strength, secondary hardening steels with superior to

1997-07-08

1999-05-04

Yee, Deborah

Metal treatment

Stock

Ferrous

148335, C22C 3812

Patent

active

059000759

ABSTRACT:
High strength steel is produced by a first rolling of a steel composition, reheated above 1100.degree. C., above the austenite recrystallization, a second rolling below the austenite recrystallization temperature, water cooling from above AR.sub.3 to less than 400.degree. C. and followed by tempering below the Ac.sub.1 transformation point.

REFERENCES:
patent: 4572748 (1986-02-01), Suga et al.
patent: 4767475 (1988-08-01), Fukuda et al.
patent: 5310431 (1994-05-01), Buck
patent: 5449420 (1995-09-01), Okada et al.
patent: 5454883 (1995-10-01), Yoshie et al.

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