Importance

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Abstract

Method of continuous heat-treatment of metal strips, wherein the strip which is to be heat-treated passes through a furnace which is thermally isolated and in a protective atmosphere, consisting of heating, holding and cooling sections; the said strip is guided by a plurality of return rolls situated in the upper and lower parts of the said sections and thus forms a plurality of lengths and they pass in front of cooling and traditional heating (generally produced by a radiation source or using naked flames), and induction means, the latter are placed upstream of at least one traditional heating section and are used combined and simultaneously with the other heating means in order to compensate for the variations in the heat-treatment parameters.

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First Claim