PRODUCTION METHOD OF MULTILAYER CLAD MATERIAL

摘要

A production method includes a rolling step of obtaining a laminated plate by clad rolling first and second metallic plates in a superposed manner at a rolling reduction of 25% to 85%, a surface activation treatment step of subjecting at least joint scheduled surfaces of the laminated plate 20 and a third metallic plate 3 to a surface activation treatment in vacuum, and a cold pressure welding step of, after performing the surface activation treatment, in vacuum, cold pressure welding the laminated plate 20 and the third metallic plate 3 in a superposed manner that the joint scheduled surfaces thereof are in contact with each other by and between a pair of pressure rolls 44 and 44 so that a rolling reduction becomes 0.1% to 15%.

主权项

1. A production method of a multilayer clad material, comprising:
a rolling step of obtaining a laminated plate by clad rolling a first metallic plate and a second metallic plate made of dissimilar metallic materials or same metallic material in a superposed manner at a rolling reduction of 25% to 85%; a surface activation treatment step of subjecting at least a joint scheduled surface of the laminated plate and at least a joint scheduled surface of a third metallic plate to a surface activation treatment in vacuum; and a cold pressure welding step of, after performing the surface activation treatment, in vacuum, cold pressure welding the laminated plate and the third metallic plate by and between a pair of pressure rolls so that a rolling reduction becomes 0.1% to 15% in a superposed manner that the joint scheduled surface of the laminated plate and the joint scheduled surface of the third metallic plate are in contact with each other.