Introduction of copper casting quality

Introduction of copper casting quality
Copper casting machinery, have the excellent physical properties, it can have the comprehensive performance of strength, hardness, toughness with different, can also has one or more special properties, such as wear resistance, high temperature resistance, corrosion resistance and low temperature. The weight of the casting and the size range is very wide, the lightest weight is only a few grams, up to the most which up to 400 tons, the thin wall thickness of only 0.5 mm, thickness can be more than 1 meters, the length can be from a few millimeters to several meters, which can meet the requirements of different industrial sectors. Copper castings due to various factors, there are holes, slag, crack, pit defects. Repair equipment commonly used for argon arc welding, resistance welding, cold welding machine. Casting defects for the appearance and quality requirements are not high can welding with argon arc welding machine, heat large, fast to repair. But in the precision copper casting defect repair field, due to argon welding thermal effects, repair will cause the deformation of castings, reduce the hardness, trachoma, local annealing, cracking, pinhole, wear, scratch, bite, or inadequate binding force and stress injury and other two defects. Cold welding can overcome the above shortcomings, its main advantages in small heat affected zone, casting without preheating temperature, cold welding repair, and no deformation, undercut and residual stress, does not generate local annealing and does not change the casting metal structure. Surface defect repair and cold welding machine is suitable for precision copper castings.