摘要
铝基复合材料是一类优良的结构材料,但该材料焊接性较差,提高铝基复合材料焊接接头性能具有重要意义。在SiC_(p)/6061Al复合材料激光填粉焊接过程中,向CoCrNi增强AlSi12填料中添加Ti,研究Ti对焊接接头的影响。结果表明:Ti均匀分布在焊缝中,并在CoCrNi相周围形成TiNi3相,CoCrNi相由粗大的树枝状转变成细小的三角形状,形成了固溶强化、弥散强化和细晶强化。焊接接头熔合区界面清晰,界面没有反应物生成,形成了良好的物理冶金结合界面。焊接填料中添加Ti后,焊缝硬度提高了30%,焊接接头的拉伸强度和延伸率同时上升。SiC_(p)/6061Al激光填粉焊接时,CoCrNi增强AlSi12的混合填料中添加Ti元素,可以有效改善焊接接头质量,提高力学性能。
Aluminum matrix composites are a type of excellent structural material,however,their poor weldabili-ty necessitates significant improvements in joint properties.Ti was introduced into a CoCrNi-reinforced AlSi12 filler during laser powder-filled welding of SiC_(p)/6061Al composites to investigate its influence on the welded joints.The results show that the Ti is evenly distributed in the weld,and TiNi3 phase is formed around the CoCrNi phase,Additionally,the CoCrNi phase changes from the coarse dendritic shape to the fine triangular shape,contributing to solid solution strengthening,dispersion strengthening,and fine grain strengthening.The in-terface of the fusion zone of the welded joint was clear,with no reaction products generated at the interface,forming a good physical metallurgical interface.After adding Ti to the welding filler,the weld hardness in-creased by 30%,and the tensile strength and extension of the welded joint increased at the same time.When per-forming SiC_(p)/6061Al laser filler welding,adding Ti to CoCrNi reinforced AlSi12 mixed filler can effectively im-prove the quality of welded joints and improve mechanical properties.
作者
赵明娟
王高昱
赵龙志
李宇欣
于泓冰
张钦文
穆晨鹏
Zhao Mingjuan;Wang Gaoyu;Zhao Longzhi;Li Yuxin;Yu Hongbing;Zhang Qinwen;Mu Chenpeng(Nanchang Key Laboratory of Advanced Materials and Laser Additive Manufacturing for Transport Vehicles,East China Jiaotong University,Nanchang,330013,China;State Key Laboratory of Rail Transit Infrastructure Performance Monitoring and Guarantee,East China Jiaotong University,Nanchang 330013,China;School of Materials Science and Engineering,East China Jiaotong University,Nanchang,330013,China)
出处
《华东交通大学学报》
2025年第1期113-119,共7页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(51965022)。
作者简介
通信作者:赵明娟(1976-),女,教授,研究方向为金属基复合材料。E-mail:zhaomingjuan100@163.com。
