Patent ID: 8191609

Claim:
A method for manufacturing a clad material which is composed of a core material and two or more skin materials which 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; 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 metal for core material in their component compositions, without hot rolling the ingot for skin material; a rolled plate for skin material preparation process where a rolled plate for skin material is manufactured by further hot-rolling the ingot for skin material; a superposition process where a superposed material is manufactured by superposing the ingot for skin material which has not been hot rolled and one face of the ingot for core material, and superposing the rolled plate for skin material and the other face of the core material; and a clad hot-rolling process where a clad material is manufactured by hot-rolling the superposed material.