浅谈镍基合金625 + X60复合管焊接注意事项

Discussion on Matters Needing Attention for Welding Nickel-Based 625 + X60 Clad Pipes

摘要: 镍基合金625 + X60复合管具有良好的抗腐蚀性和经济性，现已广泛应用于油气田场站管道。镍基合金复合管不仅化学成分和物理性能差异大，而且镍基合焊接过程中易于氧化，液态焊缝金属流动性差，焊接接头容易产生热裂纹、气孔、夹渣、成型差等缺陷。本文从保证焊缝质量和提高施工效率、降低施工成本出发，对焊接中的注意事项进行详细介绍，为今后相关的焊接工作提供参考。

Abstract: Nickel-base 625 + X60 clad pipes have good corrosion resistance and economy, and have been widely used in oil and gas field pipes. Nickel-based alloy clad pipes not only has great difference in chemical composition and physical properties, but also is easy to be oxidized in nickel-based welding process, metal fluidity of liquid welding seam is poor, and defects such as heat crack, porosity, slag inclusion and forming error are easy to occur in welded joints. Starting from ensuring weld quality, improving construction efficiency and reducing construction cost, this paper introduces the matters needing attention in welding in detail, so as to provide reference for future welding work.