铸造缺陷主要有气孔、砂眼、缩孔、疏松、裂纹等，且缺陷尺寸大小不同，通常情况下可造成１５％左右的废品率。传统的焊补工艺劳动强度大，成本高，效率低，有时还会因变形、裂纹等造成废品。而铸铁及有色金属就更难焊接。为此，郑煤集团机电总厂铸造分厂通过近几年的实践... Casting defects mainly stomatal, trachoma, shrinkage, porosity, cracks, etc., and the size of defects of different sizes, usually can cause about 15% of the rejection rate. Traditional welding process labor-intensive, high cost, low efficiency, and sometimes due to deformation, cracks and other waste. Cast iron and nonferrous metals are harder to weld. To this end, Zheng Coal Group Electromechanical Plant foundry through the practice in recent years ...