| 摘要 |
PURPOSE:To make it possible to use a pot made of Al or Cu with no difficulty by forming a recess at the bottom surface of the pot body made of Al or Cu, and welding a clad material plate incorporating Fe and Al or Cu protruding a little from the recess. CONSTITUTION:At the bottom surface of a formed pot body 1 made of Al or Cu, a recess 3 with the diameter smaller than that of the bottom surface is formed, and its depth is made 1-2mm. A clad material plate 4 with the diameter same as the recess 3 is made of a complex plate of iron and aluminum, for example, and it is geared to the recess 3 of the bottom surface of the pot body 1 positioning its iron part 6 at the outside to the inner side of the Al or the Cu 5. In this case, the Al or the Cu part 5 inside the plate 4 is made to protrude from the depth of the recess 3. Then, the pot bottom surface and the plate 4 surface are closely contacted perfectly while applying a pressure to the upper side of the plate 4 by a pressure machine a, and an Al-welding 7 is applied to the connecting part of the pot body 1 and the clad material plate 4. |
