Welding repair method for precision casting

During the processing and production of precision casting, the grinding method can be used to remove defects on the product. After grinding, the size of the casting needs to effectively meet the tolerance requirements of the casting size. Generally, deformed castings are allowed to be corrected by mechanical methods.

Precision casting castings can be directly repaired by welding during use. When the product is welded by tungsten inert gas arc welding, the welding area and welding depth must comply with its regulations. The welding area in the product refers to the area after expansion and repair.

Precision castings cannot be welded more than three times at the same place. The spacing of the casting at the edge of the welding area, including the welding area on the reverse side, must not be less than the sum of the diameters of the two adjacent welding areas. All castings supplied in the heat treatment state need to be heat treated in the original state after welding.