铜-镍中间层对钛/钢激光焊接头组织与性能的影响  

Effect of Cu-Ni Interlayer on Microstructure and Properties of Laser Welded Titanium/Steel Joints

作　　者：周自宝 ZHOU Zibao

机构地区：[1]芜湖职业技术学院现代物流智造学院,安徽芜湖241000

出　　处：《安徽职业技术学院学报》2024年第2期20-25,共6页Journal of Anhui Vocational & Technical College

基　　金：安徽省教育厅高校自然科学研究重大项目“高性能无人机用动力锂电池的研发”(KJ2020ZD72);安徽省教育厅高等学校省级质量工程项目“飞机机电设备维修专业教师教学创新团队”(2022cxtd168);安徽省教育厅高校自然科学研究重点项目“通用飞机翼身气动特性关键技术研究”(2022AH052190)。

摘　　要：文章采用添加铜-镍作为中间层的激光热导焊工艺制备钛/钢搭接焊接头,通过改变激光功率对焊接接头组织与性能的变化进行研究。研究表明,铜-镍中间层的加入改变了钛/钢激光焊接熔池的组织形貌以及元素分布情况,通过SEM、EDS、XRD等对熔池各区域检测分析,发现在靠近钛母材一侧形成了Ti-Ni、Ti-Cu等新相,有效抑制了Fe-Ti二元脆性相的产生,通过力学实验发现激光功率为2900W时,钛/钢焊接接头的力学性能最好,最大剪切力为1845.02N,说明铜-镍中间层的添加改善了钛/钢异种金属的焊接性。In this paper,the laser thermal conductivity welding process was used to prepare titanium/steel lap welded joints using Cu-Ni interlayer.The changes in the microstructure and properties of the welded joints were studied by changing the laser power.The research shows that the addition of Cu-Ni interlayer changed the microstructure and element distribution of titanium/steel laser welding pool.Through SEM,EDS and XRD,it was found that new phases such as Ti-Ni and Ti-Cu were formed on the side near the titanium base material,which effectively inhibited the formation of Fe-Ti binary brittle phase.The mechanical experiments show that the mechanical properties of titanium/steel welded joints are the best when the laser power is 2900W,and the maximum shear force is 1845.02N,indicating that the addition of Cu-Ni interlayer improves the weldability of titanium/steel dissimilar metals.

关 键 词：钛/钢异种金属 激光焊接 中间层 组织与性能 

分 类 号：TG456.7[金属学及工艺—焊接]