METHOD AND APPARATUS FOR PRODUCING A STEEL STRIP
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United States of America Patent
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Feb 16, 2017
app pub date -
Apr 15, 2015
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Apr 15, 2014
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Abstract
The invention relates to a method and to an apparatus for producing a steel strip, in particular a steel strip having a bainitic microstructure, such as for example a spring steel strip or a punching tool, wherein the steel strip is made to pass continuously through the following treatment steps: austenitization of the steel strip at a first temperature above the austenitization temperature; quenching of the steel strip, by means of a gaseous quenchant, to a lower, second temperature selected in accordance with a desired steel microstructure. According to the invention, the gaseous quenchant is conducted onto the steel strip in such a manner that uniform cooling is achieved over the width of the steel strip.
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