抄録
The effects of welding parameters and wire compositions on the droplet transfer of CO2 arc welding by flux-cored wire, have been examined by means of photograph by a high speed camera.
As the welding current and the argon content in CO2 shielding gas are increased, the droplet transfer becomes more preferable; the average droplet diameter decreases and the transfer frequency increases.
The wire cross-sectional shape has almost no influence on the droplet transfer. Increase of flux percentage in wire is effective in the improvement of the droplet transfer.
As the increase of TiO2, Fe-Si and Al2O3 or the decrease of CaF2 content in flux, the droplets become smaller and transfer more frequently. The effect of iron powder and Fe-Mn content is almost none. These variations of droplet transfer can be mainly explained by the repulsive force of slag vaporization in the droplet suspended at the tip of the wire.
