Patent ID: 6106638
Filing Date: 2000-08-22
Classification: B22D,C21D

Abstract:
A process for manufacturing thin strip ferritic stainless steel, comprising the steps of solidifying, directly from a molten state, a strip of ferritic stainless steel including at most 0.12% of carbon, at most 1% of manganese, at most 1% of silicon, at most 0.040% of phosphorus, at most 0.030% of sulfur and between 16 and 18% of chromium, said strip being solidified between two close-together, internally-cooled, counterrotating rolls with horizonal axes; cooling said strip or leaving said strip to cool to prevent said strip from remaining within an austenite to ferrite and carbides transformation range, coiling said strip at a temperature of between 600.degree. C. and a martensitic transformation temperature; cooling the coiled strip at a maximum rate of 300.degree. C./h down to a temperature of between 200.degree. C. and ambient temperature, and then box annealing said strip.