CO_2气体保护焊虽然具有成本低、生产效率高等优点,但有时也会出现气孔等焊接缺陷。这样不但严重地影响焊接质量,而且会造成工件多次返修,以至报废。我们车间在前一段时间内,焊接气孔问题极为突出。据统计,经X光检验后的焊缝,因有气孔而造成返工的达50％。开始我们着重在焊接规范上找原因,如检查焊丝伸出长度、气体流量、喷嘴结构等是否合适,后又发现气路有泄漏情况,但排除这些因素后,仍发现有气孔出现。于是,我们又在气 Although CO2 gas shielded welding has the advantages of low cost and high production efficiency, weld defects such as pores may sometimes occur. This will not only seriously affect the quality of welding, but also cause multiple repairs to the workpiece, and even scrapped. In our workshop some time ago, the issue of welding porosity was extremely prominent. According to statistics, after the X-ray examination of the weld, due to stomatal rework caused by up to 50%. Beginning we focus on the reasons for the welding specifications, such as checking the wire length, gas flow, nozzle structure is appropriate, and then found the gas leaks, but ruled out these factors, still found to have stomata. So, again, we are angry