Patent ID: 8091612

Claim:
A method for manufacturing a clad material composed of a core material and one or more skin materials that are superposed on either one or both faces of the core material, the method for manufacturing the clad material comprising: a core material preparation process where an ingot for core material is manufactured by melting, mixing and casting a metal for core material in a core material preparation process; a skin material preparation process where an ingot for skin material is manufactured by melting, mixing and casting a metal for skin material different from the core material in their component compositions, without hot rolling the ingot for skin material; a superposition process where the ingot for skin material, which has not been hot rolled, is superposed as a skin material at a predetermined position of either one or both faces of the ingot for core material to manufacture a superposed material; and a clad hot-rolling process where the superposed material is hot-rolled to manufacture a clad material, wherein, in the skin material preparation process, at least one of the skin materials is manufactured by a slice process where an ingot for skin material manufactured by being melted, mixed and cast is sliced into a predetermined thickness, and wherein, after the slice process, the surface of the sliced skin material having a predetermined thickness is further subjected to a surface smoothing treatment.