S32101双相不锈钢U形坡口激光填充焊接热力仿真分析  

Thermal Simulation Analysis of S32101 Duplex Stainless Steel U-shaped Groove Laser Filling Welding

作　　者：张光亮 朱加雷[1] 赵晓鑫 苏玉昆 赵成露 黄钰珊 ZHANG Guangliang;ZHU Jialei;ZHAO Xiaoxin;SU Yukun;ZHAO Chenglu;HUANG Yushan(School of Mechanical Engineering,Beijing Institute of Petrochemical Engineering,Beijing 102600,China)

机构地区：[1]北京石油化工学院机械工程学院,北京102600

出　　处：《精密成形工程》2025年第4期150-159,共10页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金联合基金重点支持项目(U22B20127);国家自然科学基金(52205331);北京市属高等学校高水平科研创新团队建设支持计划(BPHR20220110)。

摘　　要：目的研究多层多道激光焊接填丝熔覆下6 mm深的U形坡口S32101双相不锈钢的温度及应力应变变化。方法使用有限元商业软件ABAQUS建立焊接有限元分析模型,分析S32101双相不锈钢U形坡口焊接过程中瞬时温度场和应力场的行为,并与实际焊接过程中DH8302动态信号测试仪测得的应变结果进行比对分析。结果随着热源的加载,焊接试板厚度方向的温度梯度逐渐升高,并向焊缝周围扩散,温度以焊缝为对称轴呈对称分布。将模拟得到的焊缝温度云图与试验中观察到的金相焊缝形状进行比较,确认了数值模拟所使用的热源模型和材料参数的正确性和合理性。各区域的应力场呈对称分布,随着焊接道数的增加,热源提供的能量以热传导和热辐射的形式向周围传递热量,焊接试板温度逐渐升高,且温度分布不均匀,导致产生内部残余应力,高应力值区域集中在焊道两端的坡口位置。热源极高的能量使熔池熔化,降低了前面焊道的应力水平。结论通过有限元计算研究了S32101双相不锈钢激光填充焊接过程中温度场和应力场的分布规律,为优化焊接工艺和规划焊接参数提供了理论指导。The work aims to study the temperature,stress and strain change of U-groove S32101 duplex stainless steel in 6 mm multi-layer and multi-channel laser filling welding.A finite element analysis model for welding was established using the commercial finite element software ABAQUS.The behavior of the instantaneous temperature field and stress field during the U-groove welding process of S32101 duplex stainless steel was analyzed,and compared with the strain results measured by the DH8302 dynamic signal tester in the actual welding process.As a result,it was found that with the loading of the heat source,the temperature gradient in the thickness direction of the welded test plate gradually increased and diffused around the weld,and the temperature showed a symmetrical distribution with the weld as the axis of symmetry.The results of the simulated heat source on the shape of the weld were compared with the observed metallographic weld shape in the experiment to confirm the correctness and rationality of the heat source model and material parameters used in the numerical simulation.The stress field in each region presented a symmetrical phenomenon.As the number of welding passes increased,the energy provided by the heat source transferred heat to the surrounding area in the form of thermal conduction and radiation.The temperature of the welded test plate gradually increased,and the uneven temperature distribution lead to the generation of residual stresses inside.The high stress value areas were concentrated at the groove positions at both ends of the weld bead.The extremely high energy of the heat source caused the molten pool to melt,reducing the stress level of the previous weld bead.In conclusion,the distribution patterns of temperature and stress fields during laser filling welding of S32101 duplex stainless steel are studied through finite element calculations,providing a theoretical guidance for optimizing welding processes and planning welding parameters.

关 键 词：S32101双相不锈钢 数值模拟 温度场 应力场 热源 

分 类 号：TG404[金属学及工艺—焊接]