| 摘要 |
PURPOSE:To reduce the ununiformity of thickness and a camber of cladding material by providing dummy parts on a base metal steel original plate by an open sandwich method and arranging the original plate having the higher high-temperature deformation resistivity of the base metal steel original plate and a cladding material original plate at the lower side to perform the hot rolling. CONSTITUTION:The cladding material 1 is superposed on the base metal steel original plate 2 having the size longer than the cladding material by the prescribed quantity and the periphery is subjected to the shielded welding 3 and the dummy parts 4 projecting from respective edge of the cladding material original plate 1 are provided on the front and rear edges in the rolling direction of the base metal steel original plate 2. Next, in the case the high- temperature deformation resistance of the cladding material original plate 1 is higher than that of the base metal steel original plate 2, for instance, when the hot rolling is performed, a clad part 8 is made in a downward camber state with the rolling reduction which state continuous till the dummy part 4 comes into contact with a stopper guide 6 or a roller table 7. When the contact is carried out, then, a reaction is received and afterward, the camber is controlled and rolled down. As a result, the sound clad steel plate without the ununiform thickness of the cladding material at the front and rear edges due to the downward camber at the time of rolling can be obtained. |
