| 摘要 |
PURPOSE:To improve the yield of product by rolling down preliminarily both ends, etc. in the rolling direction of a clad steel slab of a high temp. and rolling the entire part of the slab while the corners thereof are held press-welded. CONSTITUTION:Both ends 4a, 4b in the longitudinal direction of a 3-layered or other clad steel slab 4 are respectively rolled down in a high temp. state. prior to rolling. Such bite-back rolling is repeated several times to press-weld both ends 4a, 4b of the slab 4 and to join securely said ends. The entire part of the slab 4 is then rolled to obtain the clad steel plate having the prescribed thickness. The same effect is obtd. even by the preliminary rolling reduction of both ends or four corners in the transverse direction in place of both ends 4a, 4b in the longitudinal direction. The crop owing to exfoliation is decreased by such method and the production yield of the clad steel plate is remarkably improved. |
