NON-RIDGING FERRITIC CHROMIUM ALLOYED STEEL

Application 639/KOL/2004 published 2006-09-01, filed 2004-10-11
A ferritic non-ridging stainless steel and process therefor. A chromium alloyed steel melt containing sufficient titanium and nitrogen but a controlled amount of aluminium is cast into an ingot or continuously cast into a strip or a slab having an as-cast fine equiaxed grain structure substantially free of columnar grains. The as-cast steel contains 0.08% C, at least all percentage by weight, the balance Fe and residual elements. Preferably, Ti 0.10% and is controlled so that the ratio of A hot processed sheet may be formed from a continuously cast slab without grinding the surfaces of the slab. The hot processed sheet may be descaled, cold reduced to a final thickness and recrystallization annealed. Annealing the hot processed sheet prior to cold reduction is not required to obtain an annealed sheet essentially free of ridging and having high formability. (FIG.nil)

Applicant

ARMCO INC.
705 CURTIS STREET, MIDDLETOWN, OHIO 45044-3999, UNITED STATES OF AMERICA

Inventor

1.EIZO YOSHITAKE; 2.ALAN R. MCKAGUE

International Info

Classification: C22C 38/22
Publication Number:

Priority Information

08/994382 USA 1997-12-19
09/153822 USA 1998-09-15