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磁场电流对镁合金焊接接头疲劳性能的影响
引用本文:苏允海,温小波,刘铎,刘政军. 磁场电流对镁合金焊接接头疲劳性能的影响[J]. 焊接学报, 2011, 32(4): 79-82
作者姓名:苏允海  温小波  刘铎  刘政军
作者单位:沈阳工业大学材料科学与工程学院,沈阳,110870
基金项目:辽宁省自然科学基金资助项目,辽宁省教育厅基础研究计划资助项目
摘    要:对5 mm厚的AZ31镁合金板进行GTAW焊过程中,施加纵向交流磁场,在施焊过程中调节磁场参数对试样进行疲劳试验.采用扫描电子显微镜及光学金相显微镜对疲劳试样的断口和显微组织进行分析,研究磁场电流对AZ31镁合金接头组织和力学性能的影响规律,并对磁场作用机理进行探究.结果表明,外加纵向磁场可以促使电弧旋转对熔池进行搅拌...

关 键 词:镁合金  纵向磁场  电磁搅拌  疲劳性能
收稿时间:2009-11-23

Effect of magnetic field current on fatigue properties of magnesium alloy welded joint
SU Yunhai,WEN Xiaobo,LIU Duo and LIU Zhengjun. Effect of magnetic field current on fatigue properties of magnesium alloy welded joint[J]. Transactions of The China Welding Institution, 2011, 32(4): 79-82
Authors:SU Yunhai  WEN Xiaobo  LIU Duo  LIU Zhengjun
Affiliation:School of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110178, China,School of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110178, China,School of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110178, China and School of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110178, China
Abstract:During the welding of AZ31 magnesium alloy plate(5 mm) by GTAW,AC longitudinal magnetic field was used.The fatigue properties of samples were researched under different magnetic field parameters.Scanning electronic microscope and metallographic microscope were used to analyze the fracture and microstructure of the fatigue samples.The effects of magnetic current on the fatigue properties and microstructure of the welded joint were studied,and the function mechanism of magnetic field was explored.The results show that the AC longitudinal magnetic field stirs welding pool through the rotating arc,changes the crystallizing process of crystal grain to refine the crystal grain and make the fatigue properties of welded joint improve.Under the suitable magnetic field parameter,the electromagnetic stirring achieves the best effect.The optimal value of fatigue property appears when magnetic field current Im=2 A.
Keywords:magnesium alloy  longitudinal magnetic field  electromagnetic stirring  fatigue property
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