Ways to deal with valve welding defects

In this article mainly introduces the treatment methods for welding defects of valves, including defect judgment, removal, preheating of defect parts, repair welding methods, and post-repair welding treatment. For different types of cast steel valve defects such as sand holes, pores, cracks, etc., it is necessary to judge whether repair welding is allowed according to specific circumstances and adopt appropriate methods for treatment. During the repair welding process, attention should be paid to issues such as electrode treatment, number of repair welds, and height of repair welding layers. After repair welding, stress relief treatment, non-destructive testing, hardness testing, etc. are required to ensure that the repaired valve meets quality requirements. At the same time, it emphasizes the importance of scientific repair welding of cast steel part defects, which is an energy-saving remanufacturing engineering technology.