钢桥T形接头角焊缝根部裂纹性质及其产生原因

Characteristics and cause of root cracks in fillet weld of T-joint for welded bridge

T形接头是钢桥焊接的一种重要且广泛应用的接头型式,因其受力复杂,对其焊接质量有严格的要求。文中通过微观金相和断口形貌及夹杂物成分等多种试验手段研究分析一种桥面板与纵梁T形角焊缝在采用药芯焊丝CO_2气体保护焊时产生根部缺陷的性质及产生原因,并提出防治措施。

T-joint is widely used in the welded bridge,and there are many strict requirements for welding quality because of its complex stress condition. In this paper,the characteristic and causing factors of root cracks in fillet weld of T-joint were analyzed,the preventive and controllable measures were also proposed.