This is typical of hardened heat-affected zone, weld strength is far higher with the strength of gray iron, welding drawbacks of choice material, then the selection of carbon steel electrode process specifications are not the same. Cast iron welding to well, in the following three aspects to the control of carbon, stresses the elimination of the adjustment of the structure. You can choose to use some of the welding material, such as WE777 imports of welding materials. Crack resistance is very good. In addition, the structure can be taken to the mending process, to increase the stability of the welding effect. WE777 welding process can completely cold welding process applied welding, small specification welding reduce the heat-affected