| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing T-steel for manufacturing the T-steel different in flange width without changing rolls, and to provide a rolling device. <P>SOLUTION: The method includes a rough rolling step of roughly forming a slab substantially into a T-shape, an intermediate rolling step of subjecting a roughly formed T-slab to reduction by a universal rolling mill and an edger mill, and a finishing rolling step of rolling the T-steel obtained by the intermediate rolling step to have a product dimension. A difference rf-rw between a flange draft rf and a web draft rw in performing reduction of the thickness of a web and a flange by the universal rolling mill in the intermediate rolling step is regarded as a draft difference. At least one pass for performing rolling with the draft difference within the range of 5-15% is arranged in the first-half pass in the intermediate rolling step. Moreover, in a first pass or in a plurality of first passes including the first pass, a flange front end is not subjected to the reduction by the edger mill, thereby manufacturing the T-steel with a flange leg length of a product longer than that of the T-slab. <P>COPYRIGHT: (C)2012,JPO&INPIT |
