在分析(采用 J507碱性焊条焊接)焊缝拍片率下降及不合格的原因时,发现密集或点状气孔产生的部位多数在焊缝的接头处,这固然有客观上的原因。如焊条没按要求严格烘干;焊接时环境恶劣;焊接设备的性能差等。但是,焊工思想上是否引起重视,注意力是否集中,以及操作技术上的熟练程度等,同样也是造成气孔的重要因素。一条优质焊缝是由多根焊条一根接着一根地熔化连接而成。而每根焊条从始焊到结束,都必须经历:引弧→起头→焊接→收弧→接头……的过程。实际上,焊工往往只注意中间一段的正常焊接,而忽视了引弧、收弧,接头等环节。因此,焊工在焊接时每一步的操作的 In the analysis (using J507 alkaline welding electrode) weld filming rate of decline and the reasons for the failure, it was found that dense or punctate pores of the weld joints in the majority of the site, which of course there are objective reasons. If the electrode did not require strict drying; poor environment when welding; poor performance of welding equipment. However, the welder thought whether to pay attention to whether attention is focused, as well as technical and technical proficiency, is also an important factor in causing stomatal. A high-quality weld is composed of multiple electrodes one by one fused. Each electrode from the beginning to the end of welding, must go through: arc → start → welding → arc → connector ... ... process. In fact, the welder often only pay attention to the middle of a normal welding, while ignoring the arc, arc, joints and other links. Therefore, the welder in welding each step of the operation