Method for cooling steel strip
AssigneeKawasaki Steel Corporation
InventorSachihiro Iida
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Abstract
Disclosed is an improvement of final cooling of the steel strip by immersing in cooling water, which strip has been cooled through a cooling zone in a continuous heat treating line. The improvement is achieved by injecting cooling water to the surface of the immersed strip to rapidly cool the strip to a predetermined temperature until the strip reaches the first sink-roll and resulted in that any dirt adhesion on the surface of the strip caused by contacting with the first sink-roll is prevented without increment of cooling cost.
Claims2
A method of cooling a steel strip which has been cooled through a final cooling zone in a continuous heat treating line comprising steps of:
- immersing the steel strip in cooling water within a cooling tank, passing the steel strip around one or more sink-rolls immersed in the cooling water and injecting cooling water jets to at least one of opposite surfaces of the immersed strip from a plurality of injection nozzles arranged along the immersed strip until the immersed strip reaches the first one of the sink rolls so as to cool the strip to such a low temperature that a water film interposed between the surface of the first sink-roll and the surface of the strip passing around the first sink-roll does not evaporate.
Dependencies are inferred from the claim text.