NUMERICAL SIMULATION OF WELD FORMATION IN LASER+GMAW HYBRID WELDING,I. Volumetric Distribution Mode Describing Laser Thermal Action
山东大学南校区材料学院连接技术研究所
Cite this article:
. NUMERICAL SIMULATION OF WELD FORMATION IN LASER+GMAW HYBRID WELDING,I. Volumetric Distribution Mode Describing Laser Thermal Action. Acta Metall Sin, 2008, 44(4): 478-482 .
Abstract To develop the volumetric heat source mode for laser +GMAW Hybrid welding, four new kinds of distribution functions of volumetric heat sources are proposed after considering the geometry characteristic of laser deep-penetration welds and analyzing the action features of heat source in laser welding. Through numerical analysis of temperature profiles in laser welding, the geometry and dimension of weld cross sections in laser welding are obtained under the conditions corresponding to the four kinds of distribution functions of volumetric heat sources. After comparing the predicted results to the experimental measurements, it is found that the proposed four kinds of volumetric heat source modes are appropriate and adaptive in characterizing the effect of laser thermal action on weld formation, which lay foundation for developing heat source modes in laser +GMAW Hybrid welding.
[1]Kinney P,Farson D.In:Laser Institute of Americal,ed., Proc Int Conf on Applications of Lasers & Electro-optics. Orland,FL:Laser Institute of America,2003:21 [2]Petring D,Fuhmann C,Wolf N,Poprawe R.In:Laser Institute of Americal,ed.,Proc Int Conf on Applications of Lasers & Electro-optics,Orland,FL:Laser Institute of America,2003:1 [3]Graf T,Staufer H.Weld J,2003;82:42 [4]Guan Q,Lin S Y.In:China Welding Society,ed.,Proc New Fusion Welding Technology and Applications,Wuxi: China Welding Society,2003:1 (关桥，林尚扬．见：中国焊接学会编，熔焊新技术及应用论文集，无锡：中国焊接学会，2003：1) [5]Bagger C,Olsen F O.J Laser Appl,2005;17:2 [6]Mahrle A,Beyer E.J Laser Appl,2006;18:169 [7]Qin G L,Lin S Y.Chin J Lasers,2005;32:557 (秦国梁，林尚扬．中国激光，2005；32：557) [8]Kaplan A.J Phys D:Appl Phys,1994;27:1805 [9]Lampa C,Kaplan A,Powell J,Magnusson C.J Phys D: Appl Phys,1997;30:1293 [10]Sudnik W,Radaj D,Breitschwerdt S,Erofeew W.J Phys D:Appl Phys,2000;33:662 [11]Lee J Y,Ko S H,Farson D F,Yoo C D.J Phys D:Appl Phys,2002;35:1570 [12]Cho J H,Na S J.J Phys D:Appl Phys,2006;39:5372 [13]Xu G X.MJI Research Report of Shandong University, 2007:1 (胥国洋．山东大学材料连接技术研究所研究报告，2007：1)
