The cast iron has a great influence on the mechanical properties

Due to many factors, iron castings often have defects such as air hole, pinhole, slag inclusion, crack and pit. Commonly used repair equipment is argon arc welding machine, resistance welding machine, cold welding machine, etc. For casting defects with low quality and appearance requirements, argon arc welding machine with high calorific value and suitable speed can be used to repair them.

The quality of iron castings has a great influence on the properties of mechanical products. The quality of iron castings includes appearance quality, internal quality and service quality. Appearance quality refers to surface roughness, surface defect, dimension deviation, shape deviation and weight deviation of castings; The internal quality mainly refers to the chemical composition, physical properties, mechanical properties, metallographic structure of the casting, as well as the holes, cracks, inclusions and segregation in the casting; Service quality refers to the ability of copper castings to work for a long time under different conditions, including stable performance, mainly based on actual reports, chilling and heating resistance, fatigue, shock absorption, machinability, weldability and other process properties.