clad aluminum fin materials in coil

Introduction of clad aluminum fin materials in coil:
The technological feature of the clad aluminum fin materials in coil is the use of rolling composite technology. On one or both sides of the 3xxx series and 6xxx series aluminum matrix (core layer), 4xxx series or 7xxx series aluminum alloy solder (skin layer) is overlapped. The rolling mill is welded and rolled together by high temperature and high pressure, and then cold rolled to the finished product.
 
The clad aluminum fin materials in coil is developed from the advancement of vacuum brazing technology. Its process feature is to require a composite layer of solder on the surface of the heat sink. The thickness of the filler layer is usually about 10% of the total thickness of the composite material. The melting point should be about 50°C lower than that of the base aluminum alloy, the melting point of the base alloy is 630°C to 660°C, and the melting point of the insert layer is 580°C to 610°C. Therefore, after the assembled is inserted into a furnace at about 600°C for a certain period of time, the fin base alloy will not melt, but the Al-Si alloy laminate layer used for brazing will melt, and after cooling, they will be firmly brazed into one. .
 
Technical indicators of clad aluminum fin materials in coil:
Alloy composition: 3003, 3N03, 4343, 4045, 4004, 4N43, 4N45, 4N04 and other brands;
Product thickness: (0.04~3) ± (0.01~0.03) mm;
Product width: (10~150) ± (0.20~0.30) mm;
Mechanical properties: tensile strength σb: 135~195N/mm2, elongation δ≥1%.