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本文简述了铜-钢异种金属手工焊条电弧焊存在的主要问题,并选用纯铜(T2)和低碳钢(Q235)进行焊接工艺试验,分析接头显微结构以及焊接各工艺措施对接头质量的影响。结果表明:严格焊接工艺,焊前仔细清理焊件施焊两侧铁锈、水分和油污,按规范烘干焊条;大电流,短弧焊接,并控制焊条与钢板成70°～80°的夹角,采用斜“之”字形运条方法;焊后锤击焊缝并保温缓冷等可获得良好的焊接接头,焊缝为α+ε双相组织。
In this paper, the main problems of arc welding of copper-steel dissimilar metal hand-held welding electrodes are briefly described. The welding process of pure copper (T2) and mild steel (Q235) is selected to analyze the microstructure of joints and the effects of welding process on joint quality Impact. The results show that: strict welding process, careful cleaning before welding welding rust, moisture and oil on both sides, according to the specifications of the electrode drying; high current, short arc welding, and control the electrode and the plate into the angle of 70 ° ~ 80 ° , The use of oblique “” shape transport method; after welding hammering weld and slow cooling insulation can be obtained good welded joints, weld α + ε duplex structure.