Aluminum brazing Strip

One of the key materials for the manufacture of aluminum heat exchangers is 3-layer Aluminum brazing Strip. According to reports, foreign countries have carried out in-depth research on its material, heat dissipation characteristics, brazing properties, sag resistance, etc. Due to the relatively low start of the car industry in my country. Lately, the research on the properties, materials, brazing, and sagging resistance of materials is still insufficient.
 
The car water tank radiator is located in the front pedal of the vehicle and is subjected to very harsh road conditions, repeated thermal cycles and vibrations generated in the use cycle. These factors pose serious challenges to material properties and welding methods. Therefore, car water tank radiators are Most of the Aluminum brazing Strip and aluminum alloy fluid tubes are used to assemble the high-temperature brazing surface. In addition to good brazing and heat dissipation, the composite aluminum brazing strip should also have good sag resistance. Otherwise, at 600C Brazing at high temperatures is prone to high temperature softening and deformation, which affects the performance of the radiator.
 
According to the intuitive analysis and variance analysis results of the orthogonal test results, it can be considered that for Aluminum brazing Strip for automotive heat exchangers, the cold working rate after annealing before the finished product is the main factor affecting its sag resistance, followed by annealing temperature and annealing time. .The best process conditions selected under the test conditions are that the cold working rate is 35% after annealing before the finished product, the annealing temperature is 360°C, and the annealing time is 90 min. This process can make the aluminum-manganese alloy as the core material and the aluminum-silicon alloy as the skin material. The Aluminum brazing Strip has good sag resistance.