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基于4因素3水平不交互的正交表设计X80管线钢三丝埋弧焊试验,进行平板堆焊,利用单反相机拍照焊缝宏观形貎,利用超景深显微镜的低倍放大通道测量焊缝成型参数,并进行-10℃的热影响区冲击试验。综合正交试验结果及分析,最后获得了最优焊接工艺参数是:前丝电流1250 A,中丝电流600 A,后丝电流480 A,焊接速度1.2 m/min,前丝和中丝间距18 mm,中丝和后丝间距19 mm,前丝电压(33.5±2)V、中丝电压(36.0±2)V、后丝电压(38.5±2)V。
Based on the orthogonal design of 4 factors and 3 levels, X80 pipeline steel was tested by three-wire submerged arc welding, flat surfacing welding was carried out, SLM camera was used to take pictures of the welds. Parameters, and heat affected zone impact test at -10 ° C. Based on the orthogonal test results and analysis, the optimal welding parameters were obtained: the front wire current is 1250 A, the middle wire current is 600 A, the back wire current is 480 A, the welding speed is 1.2 m / min, the front wire and middle wire are 18 mm, the distance between the middle wire and the rear wire is 19 mm, the front wire voltage is 33.5 ± 2 V, the middle wire voltage is 36.0 ± 2 V, and the back wire voltage is 38.5 ± 2 V.