Annealing and pickling process

The invention relates to a continuous annealing and pickling process of flat cold-rolled products, such as stainless steel strips, to obtain a high surface quality product at high production rates andwith a low environmental impact. It comprises the following steps: heating, up to a temperature comp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LUPERI STEFANO, PAVLICEVIC MILORAD, DULCETTI ALESSANDRO, GUANIN SIMONE, PRIMAVERA ALESSANDRA, ZACCHETTI NICOLETTA, LATTANZI LUCA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROLYTIC OR ELECTROPHORETIC PROCESSES GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS
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Beschreibung
Zusammenfassung:	The invention relates to a continuous annealing and pickling process of flat cold-rolled products, such as stainless steel strips, to obtain a high surface quality product at high production rates andwith a low environmental impact. It comprises the following steps: heating, up to a temperature comprised in the range 650-1050 DEG C, in an atmosphere with an oxygen content comprised in the range from 0,5 to 12%; heating for a time comprised from 10 to 200 sec up to a temperature comprised in the range from 650 to 1200 DEG C in presence of oxidizing agents and/or inert agents; cooling down to temperatures comprised in the range from 650 DEG C to ambient temperature in presence of oxidizing agents and/or inert agents; thermochemical or electrolytic descaling and finally possible pickling and/or passivation, by means of the use of pickling baths consisting of mineral acid solutions.