激光技术2017，Vol.41Issue(2)：270-274,5.DOI:10.7510/jgjs.issn.1001-3806.2017.02.025
外加磁场对不锈钢激光热丝焊的影响
Influence of additional magnetic field on laser hot wire welding of stainless steel
摘要
Abstract
In order to study the influence of magnetic field on laser welding, the longitudinal or transverse magnetic field was employed via adding a permanent magnet next to the specimen.Experiment investigation on laser hot wire welding of stainless steel was performed with additional magnetic field.By combining the weld cross section shape and weld microstructure, laser hot wire welding joints under different magnetic fields were analyzed.The results show that, the addition of magnetic field has a significant effect on the welding process and joint shape.The appropriate magnetic induction intensity can stabilize the laser hot wire welding process.But too large magnetic induction intensity would cause a large number of splashes.The shape of welding joint changes with the change of the direction of magnetic field, the polarity of magnetic field, and magnetic induction intensity.Transverse magnetic field can improve the welding efficiency of laser wire.Magnetic field can also decrease the columnar dendrite area, promote the formation of cell crystal, and increase the micro hardness value of weld.The additional magnetic field causes the generation of ampere force in the welding pool.Ampere force is the main force to stir pool.It changes the flow of molten metal and causes the changes of head shape and microstructure of laser hot wire welding.关键词
激光技术/激光热丝焊/磁场/接头形状/显微组织/安培力Key words
laser technique/laser hot wire welding/magnetic field/joint profile/microstructure/ampere force分类
矿业与冶金引用本文复制引用
赵泽洋,米高阳,张勋,王春明,胡席远..外加磁场对不锈钢激光热丝焊的影响[J].激光技术,2017,41(2):270-274,5.基金项目
国家九七三重点基础研究发展计划资助项目(2014CB046703) （2014CB046703）
