Analysis on All-position Operational Performance of Self-shielded Flux Cored Wire

Most of self-shielded flux cored wires are high alkalinity slag welding consumables,so their operational performance is poor.The composition of flux has an important influence on operational performance such as all position operational performance,arc stability,spatter etc for self shielded flux cored wires.Effect of cored compositions of Fe₂O₃,CaCO₃,Al-Mg,BaF₂ and Fe powder on operational performance was analyzed in this paper.Research shows that such a composition of 9% ~13% Fe₂O₃,8% ~12% CaCO₃,10% ~20% Al-Mg,40% ~50% BaF₂ and 5% ~10% Fe powder(mass percentage)brings the flux cored wires good operational performance.In addition,pretreatment on core component,strip cleaning and controlling on filling ratio etc fabrication processes also have an important effect on operational performance.So these fabrication processes should be strictly controlled.