Patent ID: 7914630
Filing Date: 2011-03-29
Classification: B21B,C21D,C23F,C23G

Abstract:
1. A process for the continuous manufacture of an austenitic stainless steel strip having a dull surface appearance with a brightness of less than 30 and an arithmetic mean roughness Ra of greater than 0.12 μm, of the annealed/pickled type, the process comprising: subjecting a cold-rolled austenitic stainless steel strip to a heat treatment in a bright annealing furnace inside which a flushing gas chosen from inert or reducing gases and having a dew point above −5° C. circulates, said flushing gas comprising less than 1% oxygen by volume and less than 1% air by volume, said heat treatment comprising a heating phase at a heating rate V pickling the strip covered with an oxide layer using an acid pickling solution capable of completely removing said oxide layer according to its thickness and its nature.