One: hot welding process. Preheat the fracture to 600 degrees, quickly weld it with J506 covered electrode, keep the temperature for 1-2 hours, and then slowly cool the fracture, which has a certain success rate. However, this kind of welding products are mainly small cast iron parts or parts with low value and poor hot welding conditions, or civil parts.

Two: cold welding process. Design suitable groove for fracture. WEWELDING777 special cast iron welding rod, with strong crack resistance, is used for small current and small specifications. In the welding process, the crack probability is reduced by tapping to release stress. WEWELDING777 is one of the most widely used maintenance materials for repairing cracks, fractures or oil leakage cracks in cast iron equipment because of its good crack resistance and perfect weld cladding by special coating. Because many equipments on site are not easy to disassemble, cold welding technology has become the main way of overhaul of cast iron, and cast iron welding rod with high crack resistance has also become one of the necessary conditions for the success of cold welding technology.