continuous annealing and pickling process

! A continuous annealing and pickling stainless steel products rolled flat with thicknesses between 0, 3 and 4 mm, surface roughness Ra <0, 50 m, consisting of the steps of process: - a first heating stage at a temperature between 650 and 1050 ° C by an average heat flux ranging from 15 to 300 kW / m2, received on each face of the strip, in a first atmosphere with an oxygen content between 0, 5 and 12%, supplied in a first heating section (1) by burners using methane and / or natural gas and / or LPG as fuel and using air and / or preheated air to a temperature of 650 ° C and / or oxygen-enriched air to a concentration of 31% and / or pure oxygen to support combustion; a second step of heating that lasts between 10 and 200 seconds at a temperature ranging between 650 and 1200 ° C in a second atmosphere of inert, different from the first atmosphere agents. Said atmosphere is provided in a second heating section (2), separated from the first heating section (1); at least a cooling step at temperatures in the range of 650 ° C to room temperature in the presence of inert agents and / or reducing agents; at least one stage or electrolytic thermochemical descaling.