X60钢级Ф559mm×32mm直缝焊管预热多丝埋弧焊试验研究

Experimental Research on Pre-heating Multi-wire SAW Process for X60 Ф559mm×32mm LSAW Pipe

摘要: 为了提高直缝埋弧焊管多丝埋弧焊接速度，采用预热四丝埋弧焊接工艺进行了X60钢级Ф559 mm×32 mm规格钢管焊接对比试验，并与常规四丝埋弧焊工艺进行对比。对比试验发现，与常规四丝埋弧焊工艺相比，采用预热四丝埋弧焊工艺时，可提高焊接速度20%，降低焊接线能量10%，整体力学性能优。证明预热多丝埋弧焊工艺在保证焊缝质量、力学性能的前提下，可以显著提高直缝埋弧焊管的焊接速度，是一种优质、高效、节能的埋弧焊新工艺。

Abstract: In order to increase the multi-wire SAW welding speed for the LSAW pipe，the welding comparative experiment for the X60 Ф559 mm×32 mm steel pipe is conducted via the pre-heating 4-wire SAW process，and a comparison with the conventional 4-wire SAW process is made. The result shows that compared with the said conventional 4-wire SAW process，the pre-heating 4-wire SAW process brings about such advantages as the welding speed is increased by 20%，the welding wire energy consumption is reduced by 10%，and the overall mechanical performance is excellent. It is proved that under the pre-conditions that the weld quality and the mechanical properties of the pipe are guaranteed，the above mentioned pre-heating multi-wire SAW process can obviously increase the welding speed for the LSAW pipe.