钢管2026，Vol.55Issue(2)：23-29,7.DOI:10.19938/j.steelpipe.1001-2311.2026.2.23.29
大壁厚X80管线钢管四丝埋弧焊工艺的数值模拟及性能研究
Numerical Simulation and Performance Study of Four-wire Submerged Arc Welding Process for X80 Heavy-wall Steel Linepipe
唐进康 1王振生 1代志健 2刘春 2陈伊祥 1龚文杰 1黄月泉2
作者信息
- 1. 湖南科技大学机电工程学院,湖南湘潭 411201
- 2. 湖南胜利湘钢钢管有限公司,湖南湘潭 411201
- 折叠
摘要
Abstract
The temperature field distribution and thermal cycle curve characteristics of the welding process are anal-yzed via numerical simulation,and then the optimized four-wire submerged arc welding process for the X80 heavy-wall steel linepipe is determined.Then welding tests are carried out to investigate the microstructure and the mechanical properties of the welded joint.The results show that thanks to optimization of the welding process parameters,the impact energy of the coarse-grain heat-affected zone(CGHAZ)at-10 ℃ can be increased to 363 J,and thus the"W-shaped"softening phenomenon of the hardness distribution in the welded joint is obviously improved;the high-temperature holding time TH and the cooling time from 800 ℃ to 500 ℃ t8/5 are key parameters leading to microstructure evolution in the HAZ;rapid cooling rate significantly promotes the formation of acicular ferrite,whereas a relatively low cooling rate leads to an increase in the amount of M-A constituents;controllingt 8/5 within 40 s can effectively inhibit the formation of brittle phases,and accordingly improve the joint toughness.关键词
X80管线钢/大壁厚/四丝埋弧焊工艺/数值模拟/显微组织/力学性能Key words
X80 pipeline steel/heavy-wall/four-wire submerged arc welding process/numerical simulation/mic-rostructure/mechanical properties引用本文复制引用
唐进康,王振生,代志健,刘春,陈伊祥,龚文杰,黄月泉..大壁厚X80管线钢管四丝埋弧焊工艺的数值模拟及性能研究[J].钢管,2026,55(2):23-29,7.
