How to repair the defects of iron castings?
Steel Casting Pipeline Valve supplier shares that due to a variety of factors, iron castings often have defects such as pores, pinholes, slag inclusions, cracks, and pits. Commonly used repairing equipment are argon arc welding machines, resistance welding machines, cold welding machines, and the like.
For casting defects that are not required for quality and appearance, it can be repaired with a welding machine such as a argon arc welding machine that generates a large amount of heat and a high speed. However, in the field of precision iron casting defect repair, due to the great influence of argon welding heat, the deformation of the casting, the hardness reduction, the blisters, the local annealing, the cracking, the pinhole, the abrasion, the scratch, the undercut, or the bonding force are insufficient. Secondary defects such as internal stress damage.
The cold welder just overcomes the above shortcomings, and Steel Casting Piping Pumps manufacturer points that its advantages are mainly manifested in the small heat affected zone, the castings do not need to be preheated, and the normal temperature cold welding repairs, so there is no deformation, undercut and residual stress, no local annealing, no change of the metal of the casting. Organizational status. Therefore, the cold welder is suitable for surface defect repair of precision castings.
The welding repair range of cold welding is the process of repeated melting and stacking of Φ1.5-Φ1.2mm welding repair points. In the process of repairing large area defects, the repair efficiency is the only factor that restricts its widespread application. For large defects, a composite application of a conventional weld repair process and a casting defect repair machine is recommended.
Sometimes we don't have a lot of defects, so we don't have to invest a lot of cost. We can fix it with some repairing agents. It is convenient and simple. For example, iron materials, we can use (Jin Sucheng) JS902 to fix it. If you can't use it, you can use it later, which can save costs for our manufacturers. Let our foundry put more money into improving the quality of the product itself, and let users create more wealth.
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