FIELD: heat engineering.
SUBSTANCE: invention relates to the heat processing of a high-strength steel strip. The strip is heated in a zone for heating with direct flame. Thermal homogenization of the strip is carried out in a homogenization chamber containing at least one radiation heating pipe in order to homogenize a temperature of the strip after passing through the zone for heating with direct flame of the previous stage. Oxidation of the strip is provided in an oxidation chamber with an oxidizing atmosphere having a volumetric oxygen concentration of more than 1%. The strip is restored in a restoration zone.
EFFECT: oxide layer with uniform and controlled thickness is obtained on the strip surface.
15 cl, 3 dwg
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