| 摘要 |
PURPOSE:To suppress the variation of a clad ratio of a clad plate, and to improve the pressure welding failure of a base metal and a cladding material by pressing the tip end part of a composite slab in the direction of a plate thickness by a pressure roller which does not rotate, when manufacturing a clad plate by rolling the composite slab consisting of the base metal and the cladding material. CONSTITUTION:A clad plate is manufactured by executing hot rolling to a composite slab 4 which has been formed by welding a base metal 1 and a cladding material 2 by an end part 3. In this case, the tip and the rear end part being a part of the peripheral edge part of the composite slab 4 are clamped by pressure rollers 11, 12 which do not rotate, and pressed by a press in the direction of the plate thickness. As for both the pressure rollers 11, 12, those which have an equal diameter are used, and the composite slab 4 is turned in the direction vertical to a line for connecting the axes of both the rollers 11, 12. The tip and the rear end part of the composite slab 4 are compressed and deformed in the direction of the plate thickness by the pressure rollers, and at the time of rolling, the plate thickness of the base metal 1 and the cladding material 2 is decreased by the tip and the rear end part, and since an absolute size of an elongation quantity in the tip and the rear end part decreased, an elongation difference of both the members 1, 2 is suppressed and lapped part decreases, and also, a pressure welding failure of both the members in which a variation of a clad ratio has been suppressed is improved.
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