This article involves the aluminum radiator vacuum brazing process. The process steps are as follows: aluminum radiator parts surface treatment, aluminum radiator parts brazing parts brazing materials, closing the furnace door, vacuum, vacuum brazing furnace gradient continuous curve heating vacuum brazing , The first stage of the vacuum brazing furnace is heated for 60 minutes, and then the temperature is maintained until the temperature of the aluminum radiator parts is ≥ 399°C. The second stage of the vacuum brazing furnace is heated for 30 minutes, and the temperature is maintained until the temperature of the aluminum radiator parts is ≥ 566°C. The third stage Heating for 20 minutes, and then insulating at a constant temperature until the temperature of the aluminum radiator part is ≥592°C, then stopping heating and cooling, taking it out for inspection, and controlling the temperature gradient continuous curve, vacuum degree, water pressure and air pressure delay alarm of the vacuum brazing furnace to allow the aluminum to dissipate heat The grain growth and brazing flow of the device parts are appropriate, ensuring uniform welding size and strength, significantly improving vacuum brazing efficiency and shortening the production cycle.

The process steps are as follows:/n(1) Assemble the brazing material on the part to be brazed of the aluminum radiator parts, put it into the vacuum brazing furnace, close the furnace door, and evacuate;/n(2) The vacuum brazing furnace uses gradient Continuous curve heating for vacuum brazing. In the first stage, the vacuum brazing furnace is heated to 515~525°C at a constant speed for 30 minutes, and then cooled to 420~440°C within 60 minutes, and then the constant temperature holding time is less than or equal to 60 minutes, and the vacuum degree of the vacuum brazing furnace is higher than 10-1Pa; /n(3) In the second stage of the vacuum brazing furnace, the temperature is raised to 570~580℃ at a constant speed for 30 minutes, and then kept at a constant temperature for less than or equal to 60 minutes. The vacuum of the vacuum brazing furnace is higher than 10-1Pa and lower than 10-2Pa; /n(4 ) The third stage of the vacuum brazing furnace is to heat up to 610~615°C at a constant speed for 20 minutes, then maintain the temperature at a constant temperature for less than 60 minutes, and cool down for less than or equal to 70 minutes. The termination temperature of the cooling and cooling is 560~580°C. The vacuum degree of the vacuum brazing furnace is high. After the vacuum brazing is completed at 10-2pa;/n(5), open the furnace door and take out the brazed aluminum radiator for inspection.