Abstract: After the force condition of droplet transfer is analyzed, the effects of the composition and technology parameter of self-shielded flax-cored wire (SSFCW) on the modes of droplet transfer are investigated. The results indicate that spray transfer and granular transfer may be promoted by adding a surface active agent or raising the C, O content in the flux core. The welding current and voltage affect the are force on the droplet. The short circuit non-explosion transfer and explosion transfer may be enlarged with the increase of current. The short circuit explosion transfer and granular transfer may be increased when voltage rises. The current and voltage also have an influence on the transfer time that affects the protective result and welding spatter.

Key words: Droplet transfer, Operative performance, Self-shielded flux-cored wire (SSFCW)