Study on the effect of temperature and duration on vacuum brazing of 6061 alu minum alloy with 4004 filler metal
In this work,6061-T6 alu minum alloy was employed as the research object.Uses 4004 alu minum alloy as the filler material for vacuum brazing,and controls the temperature and duration of the high-temperature section to brazing 6061 alu minum alloy water-cooled plate with different brazing seams.The brazing condition of the test piece and the microstructure of the brazed seam were analyzed and characterized using the airtight test bench,the water immersion ultrasonic detector,the macro camera and the metallographic microscope.The re-sults indicate that the temperature in the high-temperature section of brazing is low or the duration is short,the fluidity of the filler material is insufficient,and there is detachment of the brazing seam.On the contrary,high temperature or long duration in the high-temperature section of brazing can cause weld ablation.When the vacu-um degree of the furnace is ≤2.0×10-3 Pa,the temperature of high-temperature brazing section is 595 ℃,and the during of brazing is 80 min,the 6061 alloy brazing seam formed by vacuum brazing process good form-ability and sealing performance.
6061 alu minum alloy4004 filler metalvacuum brazingtemperatureduration
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