CLAD SHEETS FOR HEAT EXCHANGERS Russian patent published in 2018 - IPC B32B15/01 B22D7/02 B23K20/04 B23K103/10 B21D53/02 F28F21/08 

FIELD: technological processes.

SUBSTANCE: invention can be used in the manufacture of composite metal sheets and products thereof, in particular, corrosion-resistant heat exchangers. One or both of the cladding layers of the sheet contain aluminum alloy AA1XXX or AA3XXX, while the magnesium content is <0.2 wt.%. Core layer contains alloy AA5005, or AA5052 or AA4045. In the production of a composite metal sheet, the first cladding layer, the core layer and the second cladding layer can be joined by rolling or by casting to form an ingot which is then subjected to rolling. During the production of heat exchangers, anti-welding paint is applied to selected areas of the surfaces of the composite metal sheets, and after connecting them by rolling, the selected area between the first and second composite metal sheets is inflated to form channels.

EFFECT: invention ensures obtaining composite sheets and objects obtained from them with high corrosion properties of the cladding layer.

10 cl, 3 dwg, 1 tbl, 3 ex