摘要
通过搅拌摩擦焊工艺制备泡沫铝夹芯(AFS)板预制坯,研究焊接转速、进给速度、焊接方向、粉末铺放位置对AFS板预制坯的影响。通过单向拉伸试验研究不同温度下AFS板预制坯的成形性能。观察不同焊接工艺参数和发泡条件下AFS板预制坯接头横截面及泡孔形貌的金相图并进行分析。使用X射线能谱仪和扫描电子显微镜对AFS板预制坯的微观形貌和成分进行研究。同时,利用FLUENT软件对AFS板预制坯制备温度场和发泡过程进行模拟仿真。结果表明:当焊接转速为1500 r·min^(-1),进给速度为30 mm·min^(-1)时,获得板粉混合均匀的AFS板预制坯接头;焊接方向沿后退侧叠焊有效消除了月牙形无粉区域;随着变形温度的升高,AFS板预制坯的伸长率先上升后下降,在发泡温度400℃时,伸长率达到最大值78%;并且,在发泡温度680℃时,保温190 s条件下,可获得孔径结构均匀的泡沫铝夹芯板。
The aluminum foam sandwich(AFS)panel preforms were prepared using the friction stir welding process,and the effects of welding speed,feed speed,rotation welding direction and powder placement position on the AFS panel preform were investigated.The formability of AFS panel preforms at different temperatures was studied through uniaxial tensile tests.Metallographic images of the cross-sections and cell morphology of AFS panel preform joints under various welding parameters and foaming conditions were observed and ana-lyzed.The microstructure and composition of the AFS panel preform were examined using X-ray energy dispersive spectrometer and scan-ning electron microscope.Additionally,the FLUENT software was used to simulate the temperature field and foaming process during the preparation of the AFS panel preform.The results indicate that an AFS panel preform joint with uniformly mixed powder and plate is ob-tained when the welding rotation speed is 1500 r·min^(-1) and the feed speed is 30 mm·min^(-1).Welding in the retreating side direction ef-fectively eliminates crescent-shaped powder-free regions.As the deformation temperature increases,the elongation of the AFS panel pre-form first rises and then decreases,reaching the maximum of 78%at the foaming temperature of 400℃.Additionally,the aluminum foam sandwich panels with uniform pore structure were achieved at the foaming temperature of 680℃and holding time of 190 s.
作者
胡楚峰
庞秋
张宇
HU Chu-feng;PANG Qiu;ZHANG Yu(Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China)
出处
《塑性工程学报》
北大核心
2025年第6期123-135,共13页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(52275368)。
关键词
搅拌摩擦焊
泡沫铝夹芯板
预制坯
成形性能
泡孔形貌
friction stir welding
aluminum foam sandwich panels
preform
formability
cell morphology
作者简介
通信作者:庞秋,女,1979年生,博士,副教授,主要从事汽车轻量化成形技术研究,E-mail:pqiu@wust.edu.cn;第一作者:胡楚峰,男,2001年生,硕士研究生,主要从事先进制造技术研究,E-mail:1029734706@qq.com。
