2024铝合金电阻点焊与回填式搅拌摩擦点焊接头组织和性能  

Microstructure and mechanical properties of resistance spot welded and refill friction stir spot welded of 2024 aluminum alloy joints

作　　者：高辉[1] 李慧聪 周灿丰[1] 赵华夏 Gao Hui;Li Huicong;Zhou Canfeng;Zhao Huaxia(Research Center of Energy Engineering Advanced Joining Technology,Beijing Institute Petrochemical Technology,Beijing 102617,China;China Aviation Manufacturing Technology Research Institute,Beijing 100124,China)

机构地区：[1]北京石油化工学院,能源先进连接技术北京高校工程研究中心,北京102617 [2]中国航空制造技术研究院,北京100124

出　　处：《焊接》2023年第1期9-15,共7页Welding & Joining

基　　金：北京市教委科技计划面上项目(KM20130017007);北京石油化工学院重要科研成果培育项目(PCF-011)。

摘　　要：为了研究铝合金材料回填式搅拌摩擦点焊搭接接头与电阻点焊搭接接头的性能差异,采用2024铝合金材料分别开展了回填式搅拌摩擦点焊以及电阻点焊焊接试验。针对采用不同焊接方法获得的焊接接头的微观组织结构、显微硬度以及十字剥离强度进行了分析与对比研究。结果表明,2024铝合金回填式搅拌摩擦点焊接头相对于电阻点焊接头,焊点形貌更加美观,可获得小尺寸的等轴细晶组织,不存在柱状晶组织结构,焊接接头力学性能明显提高,体现出了该焊接方法的技术优越性。In order to study the performance difference between refill friction stir spot welding lap joint and resistance spot welding lap joint of aluminum alloy material,refill friction stir spot welding and resistance spot welding tests were carried out with 2024 aluminum alloy material.The micro-structure,micro-hardness and cross peel strength of welded joints obtained by different welding methods were analyzed and compared.The results show that the joint shape of refill friction stir spot welding is better than that of resistance spot welding for the 2024 aluminum alloy.The micro-structure of it is belong to the smaller equiaxed crystal structure and not the columnar crystal structure.So,the mechanical properties of joint are improved significantly,and that shows the technical advantages of refill friction stir spot welding.

关 键 词：回填式搅拌摩擦点焊 电阻点焊 显微组织 硬度 力学性能 

分 类 号：TG445[金属学及工艺—焊接] TG136.3[一般工业技术—材料科学与工程]