摘要：With the increase in transmission pressure and pipe diameter of long-distance oil and gas pipelines, automatic welding of the pipeline has become the mainstream welding method. The multi-layer and multi-pass welding path planning of large-diameter pipelines with typical narrow gap grooves are studied, and a welding strategy for pipeline external welding robot is proposed. By analyzing the shape of the weld bead section of the narrow gap groove and comparing the advantages and disadvantages of the equal-height method and the equal-area method, the mathematical model of the filling layer is established. Through the test and analysis in the workshop, the predicted lifting value meets the actual welding requirements. The microstructure of the weld was analyzed by SEM. The main structure of the weld was fine acicular ferrite, which could improve the mechanical properties of the welded joint. After multi-layer filling, the filling layer is flush with the edge of the groove. The establishment of this model lays a foundation for the formulation of welding process parameters for large-diameter pipes and the off-line programming of welding procedures.

关键字：pipeline welding; narrow gap groove; filler layer strategy; prediction model

ISSN号：1996-1944

卷、期、页：卷: 15期: 17

发表日期：2022-09-01

影响因子：3.623400

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：MATERIALS

参与作者：王金鹏,Xue, Zenghuan,Wang, Hehe

通讯作者：尹铁,Zhou, Lun

第一作者：赵弘

论文类型：期刊论文

论文概要：尹铁,王金鹏,赵弘,Zhou, Lun,Xue, Zenghuan,Wang, Hehe，Research on Filling Strategy of Pipeline Multi-Layer Welding for Compound Narrow Gap Groove，MATERIALS，2022，卷: 15期: 17

论文题目：Research on Filling Strategy of Pipeline Multi-Layer Welding for Compound Narrow Gap Groove