Method of producing steel sections of improved quality

Details Method of producing steel sections of improved quality Method of producing steel sections of improved quality

1978-05-11

1979-11-27

Stallard, W.

Metal treatment

Compositions

Heat treating

148 12B, C21D 118, C21D 120

Patent

active

041759850

ABSTRACT:
A steel section 6 to 40 mm thick, emerging from a hot rolling mill at 1000.degree. to 800.degree. C. is surface quenched for 2 to 6 seconds at a cooling rate of the order of 1.5 to 5 MW/m.sup.2. During subsequent self-tempering of the quenched surface by heat from the remainder, the section tends to an equalization temperature of 500.degree. to 700.degree. C.

REFERENCES:
patent: 3666572 (1972-05-01), Nakagawa et al.
patent: 3926689 (1975-12-01), Respen et al.
patent: 4016009 (1977-04-01), Economopoulos et al.
patent: 4060428 (1977-11-01), Wilson et al.

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