Method for producing low-carbon cold rolled steel sheet having e

Details Method for producing low-carbon cold rolled steel sheet having e Method for producing low-carbon cold rolled steel sheet having e

1980-02-28

1982-01-19

Stallard, W.

Metal treatment

Compositions

Heat treating

148 12D, 148 123, C21D 948

Patent

active

RE0308510

ABSTRACT:
In the production of low-carbon steel, particularly low-carbon steel sheet containing less than 0.25% of Mn, improvements in the method and apparatus, which comprises hot rolling a steel having a controlled range content of Mn, O and S contents, then coiling thus hot rolled steel at temperatures between 600.degree.-800.degree. C., further cold rolling the hot rolled plate down to a prescribed thickness, annealing and overaging the steel in a continuous furnace, rapidly cooling the steel near room temperatures and skin pass rolling, leveling, and recoiling the sheet. Thus produced steel sheet is very useful for applications such as pressed automobile body parts which require good workability particularly good drawability.

REFERENCES:
patent: 2832711 (1958-04-01), Krahe et al.
patent: 2897698 (1959-08-01), Van Ormer
patent: 3522110 (1970-07-01), Shimizu et al.
patent: 3607456 (1971-09-01), Forand, Jr.
Dewsnap, R. F.; An Investigation of the Rapid Annealing of Sheet Gauge Mild Steel; Special Rep. 79 of The Iron and Steel Institute, London; pp. 112-120.

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