Method for manufacturing clad material and equipment for manufacturing the same

Abstract

Skin material of a clad material is composed of one or more layers, each layer of the skin materials is made of a metal different from the core material in their component compositions, and at least one layer of the skin material has a cast microstructure, when the skin material is superposed on either of one or both faces of the core material.

1 . A skin material for a clad material is composed of one or more layers;
 each layer of the skin materials is made of a metal different from the core material in their compositions; and   at least one layer of the skin material has a cast microstructure, when the skin material is superposed on either of one or both faces of the core material;   wherein at least one of the skin materials has a flatness of equal to or less than 1 mm per 1 m in the lengthwise direction, and   at least one of the skin materials has an arithmetic mean roughness (Ra) of a surface roughness in the range of 0.05 to 1.0 μm.   
     
     
         2 . The skin material for the clad material according to  claim 1 , wherein the microstructure of the skin material is that of a skin material sliced out of a slab for the skin material. 
     
     
         3 . The skin material for the clad material according to  claim 1 , wherein the skin material is made of a 1000-series, a 3000-series, a 4000-series, or a 7000-series aluminum alloy in accordance with the JIS standard. 
     
     
         4 . The skin material for the clad material according to  claim 1 , wherein at least one layer of the skin material has a cast microstructure, and the thickness of the skin material is in the range of 10 to 250 mm.