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非磁性合金激光焊旋转磁场搅拌机理
引用本文:余圣甫,张友寿,雷毅,谢志强,吴东周,刘平. 非磁性合金激光焊旋转磁场搅拌机理[J]. 焊接学报, 2006, 27(3): 109-112
作者姓名:余圣甫  张友寿  雷毅  谢志强  吴东周  刘平
作者单位:1. 华中科技大学,武汉,430074
2. 中国工程物理研究院,四川,绵阳,621900
3. 中国石油大学,山东,东营,257062
摘    要:详细地研究了激光焊非磁性材料时,熔池液态金属的电磁搅拌机理;探讨了旋转磁场对激光焊接Al-12Si合金显微组织的影响.结果表明,尽管激光束既无磁性又非导体,Al-12Si合金为非磁性材料,但旋转磁场能改变液态Al-12Si合金的运动状态,产生磁搅拌作用,细化晶粒、消除焊接缺陷.对于激光焊,旋转磁场切割焊接熔池中的液态金属,液态金属中产生感生电流,带电的液态金属受到电磁力的作用使熔池中液态金属产生旋转运动.磁场的旋转速率越高,液态金属受到的电磁搅拌作用力越强.

关 键 词:磁搅拌  旋转磁场  激光焊  Al-12Si合金
文章编号:0253-360X(2006)03-109-04
收稿时间:2005-09-26
修稿时间:2005-09-26

Mechanisms of rotational magnetic field stirring of laser welded nonmagnetic alloy for laser welding
YU Sheng-fu,ZHANG You-shou,LEI Yi,XIE Zhi-qiang,WU Dong-zhou and LIU Ping. Mechanisms of rotational magnetic field stirring of laser welded nonmagnetic alloy for laser welding[J]. Transactions of The China Welding Institution, 2006, 27(3): 109-112
Authors:YU Sheng-fu  ZHANG You-shou  LEI Yi  XIE Zhi-qiang  WU Dong-zhou  LIU Ping
Affiliation:Huazhong University of Science and Technology, Wuhan 430074,China Academy of Engineering Physics, Mianyang 621900, Sichuan, China,Huadong Petroleum University, Dongying 257061, Shandong, China,China Academy of Engineering Physics, Mianyang 621900, Sichuan, China,China Academy of Engineering Physics, Mianyang 621900, Sichuan, China and China Academy of Engineering Physics, Mianyang 621900, Sichuan, China
Abstract:The influences of rotational magnetic field on microstructures of Al-12Si alloy for laser welding have been analyzed.The test results show that the rotational magnetic field can change the behaviors in motion of liquid Al-12Si alloy,refine the weld metal grain and eliminate the drawbacks in Al-12Si weld metal,although laser beam has nonmagnetism and is not conductor,and Al-12Si alloy is nonmagnetic material.For laser welding,induction current of liquid metal in welding pool is caused,and the electromagnetic stirring force on liquid metal with electric charge lead to the rotational motion of liquid metal in welding pool,when the rotational magnetic field passes liquid metal.The higher the rate of the rotational magnetic field is,the larger the electromagnetic stirring force on liquid metal is.
Keywords:magnetic stirring  rotational magnetic field  laser welding  Al-12Si alloy
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