焊接工艺1（Welding process 1）.doc

焊接工艺1（Welding process 1） Thirty-first. 5 years in October 2007th advantages of laser technology, well, but also has a single melting depth of welding heat affected zone, sensitive and changes of [1] material components production efficiency. Laser beam welding can obtain deep and narrow welded joints at higher welding speed and lower heat input, but also has the disadvantage of sensitive to weld gap and high cost of high-power laser. 2 laser arc hybrid welding power with full advantage of this two kinds of heat sources respectively, and their complementary deficiencies, with deep penetration, high stability, high welding speed, small welding deformation and high gap bridging ability and other advantages, and in the industrial field more and more attention to by [2]. Biography: Yan (19812), male, masters degree student, mainly engaged in the research of laser welding and laser welding of 2 arc composite welding. Electrical 3 contact. Article number: 100123806 (2007) 05204892041 (Engineering Research Center, Huazhong University of Science and Technology, Wuhan 430074 national 1. laser processing; 2. Angel yeast Limited by Share Ltd, Yichang 443003) source spacing influences of process parameters on the weld shape. The laser power is greater than 2. 5kW, will produce the keyhole effect on the weld penetration effect is remarkable; and when the arc current is less than 150A, the relationship between heat input welding width and two heat source is close, when the current is more than 150A, only the arc current bead width is determined by the distance between a heat source; the best value of 2mm ~ 3mm, at this time, the welding penetration can be increased by 1.46 times to 2.54 times. The results show that the weldability of 316L stainless steel is improved by composite welding. Keywords: laser technology; hybrid welding; tungsten inert gas welding; laser welding in CLC number: TG665 current, welding industry commonly used in the production of tungsten inert gas (tungsten