激光毛化6061铝合金与聚醚醚酮的搅拌摩擦搭接焊工艺及其接头性能  

Friction stir lap welding process and joint properties of laser-textured 6061 aluminum alloy and PEEK

作　　者：许嘉熇 李红军[1] XU Jiahe;LI Hongjun(School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学机械工程学院,杭州310018

出　　处：《中国有色金属学报》2024年第12期4046-4055,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2023YFE0106400)。

摘　　要：本研究使用激光毛化技术对铝合金进行表面处理,通过摩擦搭接焊实现了与6061/聚醚醚酮(PEEK)的高质量连接。采用正交试验研究了旋转速度、焊接速度和下压量对接头拉伸剪切性能的影响,确定了最佳工艺参数,并通过观察接头界面微观形貌阐述了连接机理。结果表明:对于焊接工艺,旋转速度对焊接接头质量的影响最为显著,其次是焊接速度,下压量对铝合金的影响相对较小;确定了最佳工艺参数组合,即旋转速度为1000 r/min、焊接速度为70 mm/min、下压量为0.2 mm。在此工艺参数下,进行拉伸试验,接头的拉伸剪切力和强度分别可达到3749.10 N和14.99 MPa,接头在靠近PEEK端断裂,表明激光毛化接头具有良好的界面强化能力。此外,通过微观结构分析,6061/PEEK连接不仅存在机械嵌合,而且还存在化学键合作用,生成了新化学键Al—O—C,有助于提高接头强度。This study utilized laser texturing technology to treat the surface of aluminum alloy,achieving highquality bonding with polyetheretherketone(PEEK)through friction-lap welding(FLW).Orthogonal experiments were used to study the effects of rotational speed,welding speed and applied pressure on the tensile shear performance of the joint,and the optimal process parameters were determined.And the connection mechanism were explained by observing the micro-morphology of the joint interface.The results indicate that the rotation speed has the most significant impact on the quality of the joint,followed by welding speed,while the effect of plunge depth is relatively minor.The optimal combination of process parameters is determined as follows:rotation speed of 1000 r/min,welding speed of 70 mm/min and plunge depth of 0.2 mm.Under these process parameters,the tensile-shear force and strength of the joint can reach 3749.10 N and 14.99 MPa,respectively.The joint fractures near the PEEK end,indicating that the laser-textured joint possesses good interfacial strengthening capabilities.Additionally,through microstructural analysis,the connection between 6061/PEEK is not only mechanically interlocked but also chemically bonded,forming new chemical bonds Al—O—C,which contributes to the enhancement of joint strength.

关 键 词：摩擦搭接焊 6061/聚醚醚酮(PEEK)混合接头 激光毛化 正交试验设计 连接机理 

分 类 号：TG453.9[金属学及工艺—焊接]