Surfacing methods in recent years there are two, one is using diameter φ 3.2-5mm flux-cored wire in automatic submerged arc welding under the burden, and the other is using φ 1.2-3.2mm self-shielded flux-cored wire for open arc welding. Sub-merged arc welding and Open arc welding compared, SAW welding flux shall be used after drying, in welding process shall constantly added flux, and needed hand removal welding slag, makes heap welding process human, and material input is big, and environment bad, for welding slag effect cannot against artifacts for forced cooling to keep normal welding layer between temperature, led artifacts can welding sex by limit.
Open arc heap welding can elimination above insufficient, not only performance reliable, easily caused mother material cracking deformation, and achieved production of automation, reduced manual operation for welder long-term welding caused of fatigue caused of heap welding quality declined, while also has artificial operation not and the of efficient, can adapted quality, and efficient of heap welding requirements, so open arc welding has widely of application.
