镍基合金625 + X60复合管对接焊缝质量控制措施研究

Measures of Welding Quality Control for Nickel Base Alloy 625 + X60 Clad Pipe

摘要: 组成镍基合金625 + X60复合管的2种金属其化学成分和物理性能差异大，焊接过程中容易产生裂纹和气孔等缺陷，施工过程中通过对焊工资格、设备选用、焊材选用、焊接工艺和参数、焊接环境控制等多个方面采取措施来控制焊接质量。实践证明，通过各种质量控制措施的实施，能够有效保证焊接质量和合格率，满足沙特哈拉德项目站场焊接施工要求。

Abstract: There existed great difference between the chemical and physical properties in the 2 metals for madding up the nickel base alloy 625 + X60 clad pipe. It easily caused cracks and air holes in welding. Measures were taken for welding quality control from the aspects of welder qualification, equipment choice, welding materials, welding process parameters and welding conditions. The results indicate that the welding quality and qualified rate can meet the project requirements by all mentioned quality control measures.