Method and apparatus for continuous finishing hot-rolling a...

B - Operations – Transporting – 21 – B

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B21B 45/00 (2006.01) B21B 15/00 (2006.01) B21B 37/28 (2006.01) B23K 13/01 (2006.01) B21B 13/02 (2006.01)

Patent

CA 2180914

A method and apparatus for continuously finishing hot-rolling steel strips includes partially joining a rear end of a preceding steel strip and a leading end of a succeeding steel strip after the strips have passed through a rough hot-rolling step. The joint is flattened. The joint is rolled with a first stand of a tandem rolling mill. The mill is provided with a plurality of stands that includes a pair of work rolls and backup rolls and/or intermediate rolls, so that a compression stress acts at the unjointed section of the strips in the longitudinal direction of the joint while tracking the joint. Shape-control-rolling is performed on the joint with a second and succeeding stands so that a section of the steel strip other than the joint is subjected to the shape-control-rolling at all the stands.

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