本文研究两种焊丝在不同的坡口角度时对低合金高强钢焊接接头性能的影响。试验结果表明,接头抗拉强度主要受到焊丝合金成分和焊缝显微组织的影响,而受坡口角大小影响不大。先共析铁素体对抗拉强度有害,获得以针状铁素体为主的焊缝组织可有效提高抗拉强度。焊接接头焊缝及热影响区受坡口角变化影响较小,而熔合区则随着坡口角的增加,冲击韧性逐渐提高。 This paper studies the effect of two kinds of welding wire on the performance of low alloy high strength steel welded joints when different bevel angle. The experimental results show that the joint tensile strength is mainly affected by the wire alloy composition and weld microstructure, but not influenced by the groove angle. First proeutectoid ferrite on the tensile strength of harmful, to get acicular ferrite-based weld organization can effectively improve the tensile strength. Welding seam weldment and heat affected zone affected by the change of the groove angle is small, while the fusion zone with the bevel angle increases, the impact toughness gradually increased.