Hot rolling equipment and method for manufacturing steel product using the hot rolling equipment

Abstract

This invention provides a holding apparatus for lifting a rolling material on a transfer table to a height enough to allow a succeeding rolling material to pass through on the table, for example, for conducting passing rolling, in a hot rolling equipment, which apparatus can be installed without the need to ensure a wide space and can properly lift a rolling material. A steel product (10) is lifted while holding between both sides of the transfer table by a holding part (33a) in a plurality of sets of holding arms (33) mounted on frames (31, 32) which are lowered or lifted along four braces (21) provided on both sides of the transfer table (10). In the holding apparatus provided with the holding arm, the holding part in the holding arm has a proper heat insulating structure. There are also provided a hot rolling equipment, which, even when a controlled rolling material for which waiting time for cooling is necessary is included, the idle time in a hot rolling machine can be reduced toimprove the rolling efficiency, and a hot rolling method using the hot rolling equipment.

Description

technical field [0001] The present invention relates to a hot rolling facility and a method for manufacturing steel using the hot rolling facility. Background technique [0002] For example, in heavy-plate rolling of steel materials, steel materials with excellent material quality are produced by performing controlled rolling (Controlled Rolling; CR). [0003] At this time, when the temperature at the time of controlled rolling (the controlled rolling start temperature) is low and the plate thickness at the time of the controlled rolling (the controlled rolling start plate thickness) is thick, the rolled material becomes the controlled rolling start temperature Since it takes quite a long time, the rolling material is made to wait until it reaches the controlled rolling start temperature on the conveyance roller table near the hot rolling mill. As a result, due to such waiting for cooling, idle time occurs in the hot rolling mill, and problems such as impairing rolling effi...

AI Technical Summary

Problems solved by technology

As a result, due to this waiting for cooling, there will be idle time in the hot rolling mill, which will cause problems such as hindering the rolling efficiency.

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