| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thin strip at small investment cost by rolling a cast base- stock smaller than prescribed dimensions at the specified number of passes in a tandem type Steckel stand group, coiling it in coilers having a furnace after a 1st, 2nd and 3rd through traveling, joining by welding into an endless strip and executing reduction. SOLUTION: After the cast base stock of <=90 mm thickness travels through roller hearth furnaces 4, 4a, a slab is descaled in a scale scrubber 6 and fed to the tandem type Steckel roll stand group 7. The slab is rolled by 6 passes of the stand group 7 and, after the 1st through traveling, a base stock is coiled in the coiler 8 with a heat-retaining furnace on the outlet side. The strip which is endlessly joined by welding is again further reduced by reverse operation in the stand group 7 and coiled in the coiler 9 with the heat-retaining furnace. After the 3rd through traveling of the stand group 7, the base stock is reduced to the thickness of a desired rough finished strip whose final thickness is <=1 mm. |
