通过理论分析及实验，探讨了手工电弧焊焊条药皮中添加金属镁粉的脱硫效果。
By adding magnesium powder into the coating of electrode, the sulphurs removal in deposited metal was satisfactory.
借助手工电弧焊方法，使用CHR系列堆焊焊条对A 3、45钢进行堆焊加工，分析了其堆焊层金属的显微组织及性能。
With SMAW method, the surfaces of A3 and 45 steel were welded by using the series of CHR electrode, and the microstructure and performance of surfacing welding layer metal were analyzed.
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