A Study on Material of Self-Shielded Flux-Cored Wire

On analyzing the characteristics of the slag system of various self-shielded flux-cored wires, the High-BaF₂ slag system was obtained. Since it is very difficult to add BaF₂ powder into the flux, we chose tWo ways of granulation of BaF₂ to research into the powder adding in the course production of Self-Shielded flux-cored wire with High BaF₂ slag system. Sinter process of BaF₂-CaF₂ at 800℃ was used to granulate the powder of BaF₂. The problem of powder-adding was solved through this way. The produced powder has the characteristics of high density, better liquidity and attains the required strength. The research results also show that the SSFCW made by the produced powder demonstrates excellent processing properties, extremely low porosity sensibility.