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通过调整耐热钢R307焊条药皮中大理石/萤石的比值,对不同比值的焊条进行了断弧长度、脱渣率、飞溅率的工艺性能试验,研究了药皮中大理石/萤石的比值对R307焊条焊接工艺性能的影响。结果显示:随药皮中大理石/萤石比值的增大,焊条的断弧长度先增大后减小,比值在1.70~1.75,断弧长度达到最大值;其脱渣率先增大后减小,比值在1.75~1.80,脱渣率达到最大值;其飞溅率一直增大。综合考虑,药皮中大理石/萤石比值在1.75左右时,耐热钢焊条R307的工艺性能最好。
By adjusting the ratio of marble / fluorite in the R307 electrode coating of hot-resisting steel, the arc-length, slag removal rate and splashing rate of the electrodes with different ratios were tested. The ratio of marble / fluorite in coating Effect of R307 electrode welding process performance. The results showed that with the increase of the ratio of marble / fluorite, the breaking length of the electrode first increased and then decreased, the ratio was between 1.70 and 1.75, the breaking length reached the maximum value. The slag removal rate first increased and then decreased , The ratio of 1.75 ~ 1.80, slag removal rate reached its maximum; the splash rate has been increased. Taken together, the skin in the marble / fluorite ratio of about 1.75, heat-resistant steel electrode R307 the best performance.