This parer presents the application of narrow gap arc welding technology to crane rails, focusing on the welding material and welding technique used in the welding of QU80 crane rails.

• 摘要介绍了窄间隙强迫成形电弧焊法在钢轨焊接中的应用，重点论述了采用该方法焊接QU80起重轨无缝轨道的焊接材料、焊接工艺及实际应用情况。