Study of the Application of Fluxes in Information Engineering Material Connection

Because magnesium alloy has excellent thin-wall casting performance and good strength, stiffness and anti-collision capabilities, good electromagnetic shielding, can fully meet the 3C products highly integrated, lightweight, miniaturization, and drop collision and electromagnetic shielding, cooling and environmental requirements. Set off a wave of application of magnesium alloys. The application of single component fluxes in information engineering material connection is studied in this paper. The results show that, compared with weld made without flux, All the selected surfactant can increase the weld depth, In chloride, oxide, fluoride, the influence of CdCl2, TiO2, AlF3 is the largest, Under the different welding parameters, the depth ratio is different. In the tensile test, all the tension specimen fracture in the heat affected zone. For the samples which without flux and with CdCl2, TiO2, AlF3, The tensile strength can reach the parent metal 90%, 88%, 84%, 86%. After coating activating fluxes, the heat input increase, the grain of weld is bigger than the grain without coating. The composition of weld are magnesium group (a-Mg) and Mg17Al12 phase. That join the activating fluxes did not change the solidification characteristics of the molten pool of metal.