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采用全自动TIP TIG焊对规格为准168.3 mm×(12.7+3)mm的双金属复合管进行对接焊工艺研究,包括坡口设计、管道的组对、背面保护及全位置焊接等。焊接完成后对焊缝进行外观检验、X射线无损检测、力学性能试验及金相组织分析。结果表明,焊缝外观成型良好,无损检测均为Ⅰ级,力学性能达到标准要求。
The automatic TIP TIG welding is used to study the butt welding process of bimetal composite pipe with the standard of 168.3 mm × (12.7 + 3) mm, including groove design, pipe pair, back protection and full position welding. Weld after the completion of the weld appearance inspection, X-ray nondestructive testing, mechanical properties test and microstructure analysis. The results show that the weld appearance is well formed and the nondestructive testing is grade Ⅰ, and the mechanical properties meet the standard requirements.