Flatness of a rolled strip

  • US 9,889,480 B2
  • Filed: 03/05/2014
  • Issued: 02/13/2018
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A system for improving flatness of rolled metal, comprising:

  • a cooling unit configured to distribute cooling agent to a strip moving in a longitudinal direction such that the cooling agent distributed by the cooling unit induces a non-homogenous temperature gradient across a width of the strip and subsequent differential tensions across the width of the strip that induces localized increased tension in high tension regions of the strip, wherein the cooling unit comprises at least one nozzle having openings positioned adjacent lateral edges of the width of the strip to distribute more of the cooling agent to the lateral edges of the strip than to a middle of the width of the strip when cooling agent is distributed through the openings of the at least one nozzle, and wherein the cooling unit is positioned a distance upstream of any additional equipment capable of equalizing tension or temperature across the width of the strip, the distance defined by a minimum distance after distribution of the cooling agent is discontinued necessary for the strip to reduce the non-homogenous temperature gradient prior to contacting the additional equipment.

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