PURPOSE: To obtain a different thickness metallic plate of necessary size stably and with high accuracy, by overlapping width direction different thickness metallic slabs like a rectangle through a peeling agent, executing the hot rolling, and after that, peeling off the metallic plate.
CONSTITUTION: ≥2 steel slabs, etc. being similar to a metallic plate having desired different thickness in the width direction are overlapped by interposing a peeling agent such as alumina powder, etc. whose melting point is higher than a heating temperature of the slab, and the width direction section of the slab is formed like a rectangle. They are heated in a heating furnace, and hot-rolled, and the overlapped metallic plate is peeled off, as they are, or after cold rolling. Or after hot rolling, the metallic plate is peeled off and cold working is performed. Thus, a metallic plate whose thickness is different in the width direction, and which has desired size can be manufactured easily, stably and with high accuracy.
KAWATANI YOUJI
OOIKE YOSHIO
| JPS4740948A | ||||
| JP38012836A |