| 摘要 |
PURPOSE:To prevent generation of slab edge cracks and to reduce device arrangement by directly reducing a width of a hot slab produced by a continuous casting machine by use of a sizing press. CONSTITUTION:A slab produced by a continuous casting machine 2 is transferred in a simplified heating furnace 3 as the slab is hot to uniformize respective temps. of the slab inside, slab end parts, and surface layers. Then, the slab is transferred to a sizing press 4 and has its width reduced to a prescribed width. A temp. of end parts of the slab drops and the slab is shifted to a charging table 8 by a transfer 7 to be charged into a heating furnace 5 to reheat the end parts having a dropped temp. to uniformize temps. of parts of the slab. The slab heated as such by the furnace 5 is transferred by a extracting table 9 to a rough rolling mill 6 and is rolled to have a prescribed thickness. Hence, edge cracks are not generated and lowered thickness accuracy in the width direction caused by lateral temp. unevenness is improved, so that uniform sheet thickness accuracy with no edge crack is positively kept. |
