焊接电流和电弧电压是 CO_2气体保护焊焊接参数中最重要的二个参数。焊接电流的选择应根据所选用的焊丝直径、工件的厚度及坡口的形状等因素来决定。焊接电流与电弧电压的匹配程度,对焊接过程的稳定性、焊缝成形的好坏、飞溅的大小、焊接缺陷的产生及焊接接头的机械性能都有很大影响。通常情况下,焊接电流和电弧电压根据表1所给出的范围进行选择。由表1可看出,由于数据范围广,焊 Welding current and arc voltage are the two most important parameters in the welding parameters of CO_2 gas shielded welding. The choice of welding current should be based on the choice of wire diameter, the thickness of the workpiece and the shape of the groove and other factors to decide. The matching degree of welding current and arc voltage has a great influence on the stability of the welding process, the quality of the weld formation, the size of the spatter, the welding defects and the mechanical properties of the welded joints. Under normal circumstances, the welding current and arc voltage according to the range given in Table 1 to choose. Can be seen from Table 1, due to a wide range of data, welding