电焊机2025，Vol.55Issue(7)：57-63,7.DOI:10.7512/j.issn.1001-2303.2025.07.05
低合金钢回火焊道焊接温度场模拟计算分析及应用
Simulation and Analysis of Tempering Welding Temperature Field in Low Alloy Steel and Its Application
杜佳军 1郭前鑫 1杨涵 2王小迎 1曹忠友 1张建林2
作者信息
- 1. 神华神东电力有限责任公司技术研究院,陕西 西安 710065
- 2. 苏州热工研究院有限公司,江苏 苏州 215004
- 折叠
摘要
Abstract
Addressing the challenge of implementing post-weld heat treatment(PWHT)during on-site repair of critical low-alloy steel components,this study focuses on the temper bead welding(TBW)technique.Using A217 WC6 low-alloy steel as the research object,a finite element method based on a double ellipsoid heat source model was employed to simulate and analyze the influence of key process parameters(heat input,weld bead overlap,and interlayer grinding amount)on the distri-bution patterns of the welding temperature field.Simulation results indicate:weld bead overlap primarily affects the horizon-tal coverage position of the temperature field,while the interlayer grinding amount influences its coverage position in the thickness direction;neither alters the inherent heat distribution pattern of the weld bead itself.When using welding rods of⌀2.5 mm and ⌀3.2 mm diameters,with the bead overlap controlled between 40％and 60％and the interlayer grinding amount maintained between 1/3 and 1/2 of the layer thickness,the tempering temperature range(500 ℃ to AC1)formed by subsequent weld beads effectively covers the coarse-grained heat-affected zone(CGHAZ,1100 ℃ to 1505 ℃)of the preced-ing beads,achieving optimal tempering effects.Based on the process parameters optimized through simulation,the prepared A217 WC6 steel welded joint met the requirements of the process qualification standard and was successfully applied to re-pair a valve body in a power plant,with satisfactory results.关键词
低合金钢/回火焊道焊接技术/焊接温度场/有限元模拟Key words
low alloy steel/temper bead welding(TBW)/welding temperature filed/FEM分类
矿业与冶金引用本文复制引用
杜佳军,郭前鑫,杨涵,王小迎,曹忠友,张建林..低合金钢回火焊道焊接温度场模拟计算分析及应用[J].电焊机,2025,55(7):57-63,7.
