Method for producing steel strip or steel sheet containing carbi

Details Method for producing steel strip or steel sheet containing carbi Method for producing steel strip or steel sheet containing carbi

1977-08-31

1978-11-14

Stallard, W.

Metal treatment

Compositions

Heat treating

148 123, C21D 102, C21D 713

Patent

active

041254163

ABSTRACT:
A method for producing a low carbon deep drawing quality steel or high strength steel in the form of a strip or sheet. At least one of carbide or nitride forming elements is added to the low carbon steel to provide therein 0.015 to 0.10% Sol Al, 0.01 to 0.10% Nb, 0.01 to 0.10% Ti and 0.01 to 0.15% V. The steel is cast or bloomed to form a slab which is held above the Ar.sub.3 point for keeping the carbide and nitride forming elements in a dissolved state. Then, without allowing the temperature to fall below the Ar.sub.3 point, hot rolling and hot finishing rolling are directly carried out at a temperature above the Ar.sub.3 point. Thereafter, if necessary and desirable, the thus-rolled slab or sheet is subjected to cold rolling and annealing.

REFERENCES:
patent: 3625780 (1971-12-01), Bosch et al.
patent: 3904447 (1975-09-01), Gondo et al.
patent: 3928086 (1975-12-01), Bailey

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