Abstract
Welded arc welding repair welding technology was used to repair the casting defects of high chromium cast iron ball mill liners. Select the same high-chromium cast iron as the casting. The diameter of the electrode is 4mm and the welding current is 150-160A. After welding, the castings were found to have no cracks by surface non-destructive testing. The macro-hardness was comparable to that of the matrix material, and the microstructure showed that the fused surface was a good metallurgical bond.
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