MANUFACTURING METHOD OF LAMINATED THIN PLATE AND LAMINATED THIN PLATE

摘要

To provide a laminated thin plate having good flatness even in a thin and wide state, and to provide a method for manufacturing the laminated thin plate.SOLUTION: The manufacturing method for a laminated thin plate includes a bonding step for bonding a thin plate for an inner layer and a thin plate for an outer layer to obtain an intermediate laminated material in which the thin plate for an outer layer is bonded to both surfaces of the thin plate for an inner layer, an annealing step for annealing the intermediate laminated material, and a rolling step for cold-rolling the annealed intermediate laminated material. Here, the thin plate for an inner layer is composed of a metal selected from the group consisting of Cu, Al, a Cu-base alloy, and an Al-base alloy. The thin plate for an outer layer is composed of an Fe-Ni alloy containing of Ni+Co of 28.0-52.0% in which Co is 0-6.0%, Si of 0.5% or lower, Mn of 1.0% or lower, and the balance Fe and inevitable impurities. The laminated thin plate has a maximum steepness of 2.5% or less in a thickness of 1.0 mm or less and in a length of 800 mm.SELECTED DRAWING: None