| 摘要 |
PROBLEM TO BE SOLVED: To provide a method that prevents periodic hardness variation generated at the end of a hot-rolled coil and that reduces thickness deviation caused in a cold-rolled steel plate. SOLUTION: A coil car 2 that transports a hot-rolled coil 1 wound at 400-700°C to a placing table is heated at 80°C or above in the contact part 4 with the hot-rolled coil 1, thereby suppressing martensitic transformation caused by locally cooled outer circumferential part of the hot-rolled coil. In addition, it is even more desirable that the coil placing table is also heated or insulated in the contact part with the hot-rolled coil or that the hot-rolled coil placed on the coil placing table is covered with a heat-retaining cover. COPYRIGHT: (C)2004,JPO
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