油气管道工程用大口径TE555增材制造三通的开发

Development of Large Diameter TE555 Additive Manufacturing Tee for Oil and Gas Pipeline

从材料、制造工艺、力学性能、焊接性能、实物爆破试验性能以及无损检测、残余应力等多个方面,介绍了采用电弧增材制造技术开发的-60℃和-40℃的低温环境下油气管道工程用Ф1219 mm大口径TE555增材制造三通。开发的增材制造三通各位置强韧性均匀,无明显的方向性,无厚度效应,特别是具有较好的低温韧性;焊接性能良好,无软化现象;肩部加厚后爆破压力达到57 MPa;经过去应力处理后残余应力大幅度降低;无损检测结果表明增材制造工艺可行,无超标缺欠。增材制造三通在定制化、特殊环境和特殊用途工况情况下,具有较好的推广和应用前景。

This paper introduces the development ofΦ1219 mm large diameter TE555 additive manufacturing tee used in oil and gas pipeline in low temperature environments of-60℃and-40℃,manufacturing with WAAM technology,including materials,manufacturing processes,mechanical properties,welding performance,burst test performance,non-destructive testing,residual stress,and other aspects.The results show that the developed additive manufacturing tee has uniform strength and toughness at all positions and no obvious directionality,and no thickness effect,especially with good low-temperature toughness.It has good welding performance,no softening phenomenon.The bursting pressure reaches 57 MPa with the thickened shoulder.The residual stress is significantly reduced after stress relief treatment.In addition,non-destructive testing results indicate that the additive manufacturing process is feasible and there are no excessive imperfections.Additive manufacturing tees have great promotion and application prospects in customized,special environments,and special usage conditions.