机械与电子2026，Vol.44Issue(2)：92-99,8.
X80管线钢管端环焊缝电弧增材梯度强化结构设计与性能优化研究
Design and Performance Optimization of Gradient Reinforcement Structures for Girth Welds in X80 Pipeline Steel Pipe Ends Via Arc Additive Manufacturing
张博 1蒋庆梅 2王经 2董继鲁 3蔡志钦 3肖望强3
作者信息
- 1. 国家石油天然气管网集团有限公司建设项目管理分公司,河北 廊坊 065001
- 2. 国家管网集团工程技术创新有限公司,天津 300450
- 3. 厦门大学航空航天学院,福建 厦门 361102
- 折叠
摘要
Abstract
To address the risk of failure caused by strength-toughness mismatch in X80 pipeline steel pipe end girth welds,a gradient reinforcement method based on arc additive manufacturing is proposed.This method achieves coordinated control of stress concentration and residual stress by optimizing the geo-metric parameters and deposition path of the additive layers added externally to the girth weld.Firstly,an optimization design for the dimensions of the additively manufactured thickening zone at the pipe end is conducted,and the orthogonal experiments are used to determine the regulatory effects of key geometric parameters on the stress-strain distribution.Secondly,based on the coupled thermal-mechanical-phase multi-field theory,a two-dimensional dynamic finite element model incorporating a life-death element activation algorithm is established.A double-ellipsoid heat source model is employed to characterize the thermo-mechanical coupling effect during the process of arc additive manufacturing,revealing the forming mechanism of the pipe end and its regulatory effect on the mechanical properties of the girth welds.Experi-mental results show that after optimizing the dimensions of the additively manufactured thickening zone with a layer length L=150 mm,wall thickness increment t=30%,and transition angle θ=150°,the strength in the girth weld zone is stabilized at 550 MPa,while the impact energy in the mixed zone increa-ses significantly.The strength in the Heat-affected Zone(HAZ)increases to 590 MPa,but the transverse yield-to-tensile ratio of the base metal is relatively high,indicating potential risks of plasticity degrada-tion and embrittlement.关键词
X80管线钢/环焊缝/电弧增材制造/梯度强化/有限元模型Key words
X80 pipeline steel/girth weld/arc additive manufacturing/gradient reinforcement/finite ele-ment model分类
矿业与冶金引用本文复制引用
张博,蒋庆梅,王经,董继鲁,蔡志钦,肖望强..X80管线钢管端环焊缝电弧增材梯度强化结构设计与性能优化研究[J].机械与电子,2026,44(2):92-99,8.
