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US 9,523,135 B2Granted
Method of cold-rolling steel sheet and cold-rolling facility
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsHiroyuki Mimura, Takao Mukai, Kazuhiro Miyamoto
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Abstract
In cold-rolling a steel sheet coil, when a tail end portion of a steel sheet coil (7) is wound around a tension reel (3) prior to second-pass rolling after the completion of first-pass rolling, the tail end portion is heated to a temperature within a range of not lower than 50° C. nor higher 350° C. with a heater disposed between a rolling stand (1) and the coil tail end-side tension reel (3).
Claims8
A method of cold-rolling a steel sheet coil, comprising:
- drawing out a leading end of the steel sheet coil from a pay-off reel;
- after the drawing, winding the leading end around a first tension reel via a single-stand reverse rolling mill;
- after the winding, rolling the steel sheet coil in a first pass with using the reverse rolling mill and giving a tension between the pay-off reel and the first tension reel;
- stopping the rolling in the first pass when a tail end portion of the steel sheet coil is at a position between the reverse rolling mill and a second tension reel;
- after the stopping, heating the tail end portion to a temperature within a range of not lower than 50° C. nor higher than 350° C. with a heater disposed between the reverse rolling mill and the second tension reel, and winding the tail end portion around the second tension reel;
- and
- after the heating, rolling the steel sheet coil in second and subsequent passes with using the reverse rolling mill and giving a tension between the first tension reel and the second tension reel.
4 more elements
Dependencies are inferred from the claim text.