Hard surfacing of white cast iron rollers with combining shijiazhuang shiqiao electric welding material co., ltd is used to protect gas in electric-arc welding. It has excellent welding performance and welds with co2 or complex gas protection gas.The welding wire is steady to transfer wire, the welding line is formed beautifully, the welding fog and splash is little and also it has good fluidity and anti-crack resistance, the welding slag is thin and easy to fall and the welding line gas good breaking strength and anti-low temperature impact resistant performance, it is applied for welding of all-position and bigger electric current range