Method for producing ferritic stainless steel sheets or strips c

Details Method for producing ferritic stainless steel sheets or strips c Method for producing ferritic stainless steel sheets or strips c

1981-10-19

1985-05-07

Stallard, W.

Metal treatment

Compositions

Heat treating

C21D 804

Patent

active

045156441

ABSTRACT:
The ferritic stainless steel sheet involves a problem that the ridging is likely to generate at the forming step, such as the deep drawing step. The ridging is believed to be caused by a band structure in the hot rolled band, which structure exerting an influence on the formability of a cold rolled sheet. The ridging is prevented in the present invention by means of the combination of the three technical measures: incorporating aluminum into a ferritic stainless steel; heating a slab to a low temperature of 1200.degree. C. or less; and, carrying out a drastic hot rolling of at least one pass with the draft of 20%/pass or more. As a result of these technical measures, the structure of a hot rolled band is made and uniform and thus both the formability and anti-ridging property are enhanced.

REFERENCES:
patent: 3713812 (1973-01-01), Brickner et al.
patent: 3850703 (1974-11-01), Kalita

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