摘要
针对焊接时管线的焊缝和热影响区的化学成分不均匀性、组织偏析等缺陷,制定相应的试验方案。开发出新的焊接工艺,运用MIG焊接方法、选取相应的焊丝和混合气体作为保护气体,确定最佳焊接参数。焊接接头的焊接工艺评定试验表明,以此工艺完成的复合管道焊接符合海底输气管道的理化及机械性能要求。
Aimming at the welding defects of tissue segregation and uneven chemical composition of the welding and heat affected zone for the submarine gas pipeline, the corresponding test plan is formulated. According to the welding difficuhy of the mechanical clad pipe, the new welding process is developed, in which the MIG welding method is applied, selecting Incoloy625 nickel base welding wire, using the Ar ＋20% He mixed gas as a protective gas. The optimal welding parameters are determined. The welding procedure qualification test of the composite pipe welding joint showed that the welding can meet the requirements of physical and chemical properties and mechanical properties of the submarine gas pipeline.
出处
《船海工程》
北大核心
2015年第5期75-79,共5页
Ship & Ocean Engineering
关键词
复合管道
焊接工艺
焊缝性能
lined-pipe
welding process
welding property
