飞机机身镁合金的搅拌摩擦焊接工艺研究  

Research on friction stir welding process of magnesium alloy for aircraft fuselage

作　　者：王炳坤[1] WANG Bingkun(Xi'an Aeronautical Polytechnic Institute,Xi'an 727031,Shaanxi,China)

机构地区：[1]西安航空职业技术学院,陕西西安710089

出　　处：《模具技术》2024年第6期59-64,共6页Die and Mould Technology

基　　金：陕西省教育厅2022年度青年创新团队建设科研计划项目“高温合金叶片气膜孔精整技术的研究”(编号22JP035)。

摘　　要：为提升ZM5镁合金的焊接性能,实现该材料在机翼整体壁板中的有效应用,采用搅拌摩擦工艺对该材料实施焊接处理,并通过扫描电子显镜和维氏硬度计对焊接接口进行微观形貌观测和硬度测试。结果表明,当搅拌摩擦焊的搅拌头旋转速度为800 r/min,焊接速度为120 mm/min时,ZM5镁合金接头硬度达到85 HV的最高水平,约为母材硬度的90%,焊接效果最为理想。断裂形貌表现为少量韧窝和解理面,断裂形式为准解理断裂。根据分析结果可知,在参数合适的情况下,搅拌摩擦焊接工艺能够实现ZM5镁合金的有效粘接,可用于机翼壁板中镁合金材料的焊接与成型。In order to improve the welding performance of ZM5 magnesium alloy,the effective application of this material in the repair of the external shell and parts of the aircraft fuselage was realized.In this study,the material was welded by friction stirring process,and the microscopic morphology observation and hardness test of the welding interface were carried out by scanning electron microscope and Vickers hardness tester.After observation and testing,it is found that when the friction stir welding stir welding stir welding stir head rotation speed is 800 r/min and the welding speed is 120 mm/min,the hardness of ZM5 magnesium alloy joint reaches the highest level of 85HV,which is about 90%of the hardness of the base metal,and the welding effect is the most ideal.The fracture morphology showed a small number of dimples and cleavage planes,and the fracture form was quasi-cleavage fracture.According to the analysis results,it can be seen that the friction stir welding process can achieve effective bonding of ZM5 magnesium alloy under the condition of appropriate parameters,which can be used to repair cracks and corrosion defects in the external shell of the fuselage.

关 键 词：焊接速度 旋转速度 ZM5镁合金 微观形貌 

分 类 号：TG241[金属学及工艺—铸造]