| 摘要 |
A method for making a sandwich material. A core layer of a first alloy is provided. The first alloy includes by wt. %: 0.5-2.0% Mn, ≦̸1.0% Mg, ≦̸0.2% Si, ≦̸0.3% Ti, ≦̸0.3% Cr, ≦̸0.3% Zr, ≦̸0.2% Cu, ≦̸3% Zn, ≦̸0.2% In, ≦̸0.1% Sn and ≦̸0.7% (Fe+Ni), the rest Al and ≦̸0.05% of each of unavoidable contaminants. A barrier layer of a second alloy is provided. The second alloy includes by wt. %: ≦̸0.2% Mn+Cr, ≦̸1.0% Mg, 1.6-5% Si, ≦̸0.3% Ti, ≦̸0.2% Zr, ≦̸0.2% Cu, ≦̸3% Zn, ≦̸0.2% In, ≦̸0.1% Sn and ≦̸1.5% (Fe+Ni), the rest Al and ≦̸0.05% of each of unavoidable contaminants. The core and barrier layers are rolled together so that they adhere and form a sandwich material. The sandwich material is heat treated so that the Si-content is equalized to 0.4-1% in the core and barrier layers. The sandwich material is rolled to a final thickness. |
