| 摘要 |
PURPOSE:To improve production efficiency and to obtain a composite steel plate of high joining strength in a process for production of said plate wherein a base material having a clean cladding surface and a cladding material are superposed and both materials are subjected to circumferential edge welding and rolling for venting of air, by subjecting the materials to welding simultaneously with rolling. CONSTITUTION:A base material 1-1 having a cleaned cladding surface and a cladding material 1-2 are superposed by inserting an Ni foil or the like between the cladding surfaces to make a slab 1. The top circumferential edge 5 thereof is welded in a width direction with a welding machine 3. The slab 1 is gnawed into a rolling mill 2, and under exertion of a light rolling reduction, the slab is subjected to rolling for venting of air. At the same time, welding machines 4, 4' are set at the circumferential edge and the slab is subjected to the rolling for venting of air and the circumferential edge welding in parallel. When the rolling and welding come to the final end part of the slab, both are stopped temporarily, and the bottom circumferential edge 6 is welded in a width direction with the machine 3. Upon ending of the welding, again the slab is subjected to the rolling and the circumferential edge welding up to the final end of the slab, whereby the slab for clad steel plates free from intrusion of air is obtained. |
