南京地铁珠江路综合楼箱型柱隔板熔嘴电渣焊技术

Electro-slag welding with consumable nozzle for diaphragm of box column for Nanjing Subway Building on Zhu-jiang Road

南京地铁珠江路综合楼箱型柱设计隔板与盖、腹板之间焊缝均要求熔透,隔板与盖板焊接采用熔嘴电渣焊。文中以该工程典型杆件制造为例,介绍了电渣焊技术的焊前准备、施焊过程、焊缝检验、焊缝缺陷的处理。实践证明,采用熔嘴电渣焊技术可保证箱型柱隔板与盖板焊缝的熔透要求;采用选用的焊接工艺参数进行电渣焊焊接,焊接接头的力学性能可以满足相关标准的要求;电渣焊焊缝缺陷的返修方案切实可行,效果良好。

For Nanjing Subway Building on Zhujiang Road,full penetration welds are required for the designed diaphragm of box column with cover plate and web plate,and electro-slag welding with consumable nozzle is used for welding diaphragm with cover plate.The fabrication of typical members for this project was taken as the example.The welding preparation,welding process,weld inspection and weld defects treatment of of electro-slag welding technology were introduced.The practice proved that the full penetration welds of box column diaphragm with cover plate can be ensured with electro-slag welding;the mechanical properties of welded joints can meet the requirements of relevant standard by u-sing proper welding parameters;and the repairing plan of welding defects for electro-slag welding is feasible and in good effect.