The Study Of Activating Flux Welding Technology And Its Mechanism Of Magnesium Alloy

The weld penetration increased of chloride, oxide and fluoride activating flux on AZ31B Mg alloy TIG welding were investigated during welding. The welding parameters and flux thickness have a different effectiveness in weld penetration increased. The shape and distribution of element of welding pool in the A-TIG welding was studied.The spectrum of welding arc in the A-TIG welding Mg alloy was studied for the first time. By the electron temperature of welding arc plasma, it was found that chloride welding arc plasma were greater than that of TIG welding arc plasma, but the electron temperature of oxide welding arc plasma was increased small than that of TIG welding arc plasma. The mechanism of weld penetration increase with activating flux was discussed. For ACTIG welding of Mg alloy in this paper.The compound fluxes of the AZ31B Mg alloys were designed by the method of uniformity design. The Results showed that the prime compound fluxes have a thinner grain size in the weld seam and a better intensity than with the different kinds of fluxes.