电阻缝焊制备铁基非晶涂层温度场数值模拟  

Numerical simulation of the temperature field in resistance seam welding for fabricating Fe-based amorphous coatings

作　　者：王文琴 徐永东 韩召先 张超华 贾剑平[1] 王非凡 李玉龙[1] WANG Wenqin;XU Yongdong;HAN Zhaoxian;ZHANG Chaohua;JIA Jianping;WANG Feifan;LI Yulong(School of Advanced Manufacturing,Nanchang University,Nanchang,330031,China;Jiangxi Haoyu Heavy Industry Co.,Ltd.,Ruijin,342500,China;China Academy of Launch Vehicle Technology,Beijing lnstitute of Astronautical Systems Engineering,Beijing,100076,China)

机构地区：[1]南昌大学,先进制造学院,南昌330031 [2]江西昊宇重工有限公司,瑞金342500 [3]中国运载火箭技术研究院,北京宇航系统工程研究所,北京100076

出　　处：《焊接学报》2024年第8期24-32,共9页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(52205375);江西省基金项目(20232BAB204049,20224BAB214010,jxsq2019201118)。

摘　　要：通过电阻缝焊成功在SUS304上制备出铁基非晶涂层,并测量制备过程的温度热循环.基于Comsol采用电-热耦合的有限元方法,重点分析制备过程电流密度及温度场的动态分布及换热机理,对比温度场的试验和模拟结果可知,相同位置模拟与试验的温度热循环曲线误差很小,验证了电-热耦合方法计算电阻缝焊制备制备铁基非晶涂层温度场的可靠性.结果表明,高电流密度区域主要存在于电极轮正下方粉末层底部的某些点位、以电极轮与粉末层接触面左右两端为中心的邻近区域,铁基非晶涂层制备过程的温度场不仅与电流密度分布相关,还受电极轮移动及涂层与附近区域的热交换所影响,使稳定时,在纵向温度几乎没有变化,在x-z截面呈左边高、右边次之、中间低的“凹”字形分布,相对应的热循环曲线则呈“升-降-升”的整体升温趋势.A Fe-based amorphous coating was successfully fabricated on SUS304 using resistance seam welding(RSW),and the thermal cycling history during the welding process was measured.Based on the Comsol,the electric-thermal coupling finite element method(FEM)was adopted to analyze the dynamic distribution of current density and temperature field during the fabricating process,as well as the heat exchange mechanism.By comparing the experimental and simulated results of the temperature field,it can be concluded that the error in the temperature thermal cycle curve between the simulation and experiment at the same position is very small,which verifies the reliability of the electric-thermal coupling FEM in calculating the temperature field of the Fe-based amorphous coating fabricated by RSW.The simulation results indicate that the high current density area mainly exists at certain points at the bottom of the powder layer directly under the electrode wheel,and the adjacent areas centered on the left and right ends of the contact surface between the electrode wheel and the powder layer.The temperature field during the fabricating process of Febased amorphous coatings is not only related to the distribution of current density but also influenced by the movement of the electrode wheel and the heat exchange between the coating and the surrounding region.When the fabrication process is stable,the peak temperature remains almost unchanged in the longitudinal direction.In the x-z cross-section,there is a‘concave’distribution with higher temperature on the left side,lower temperature in the middle,and intermediate temperature on the right side.The corresponding thermal cycle curve shows an overall increasing trend of‘rise-fall-rise’.

关 键 词：电阻缝焊 电热耦合 数值模拟 铁基非晶涂层 

分 类 号：TG402[金属学及工艺—焊接]