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With the development of science and technology in the 20th century, there has been a very advanced welding methods - laser welding . Laser welding has more advantages , such as welding speed , welding deformation of the workpiece , deep penetration welding . However, due to the abnormal price expensive laser , the strict requirements of the workpiece assembly gap , poor welding efficiency shortcomings limit its large-scale industrial applications . For the laser welding of industrial applications in the late 1970s of the 20th century , the British W. Steen proposed hybrid welding laser and TIG welding , and achieved good results , causing a big stir . Afterwards, the development of several different the composite welding method , with respect to a single laser welding , the weld quality is improved to improve the welding efficiency . Laser Arc welding is a new welding techniques , it is the high energy density of the laser are combined with a cheap and efficient arc welding , thereby improving the laser welding of weld penetration and adaptability . Foreign Laser Arc Welding Technology has developed quite mature , and our basic research there are many deficiencies It is in this context that the composite laser and arc process research and laser the arc the interaction were discussed. Experiments using CO 2 the laser rangefinder MAG arc complex, study 7mm thick 616 armored steel welding , welding under various process parameters were systematically studied . The results show that : the introduction of MAG can significantly increase the depth of penetration of the laser welding and weld penetration degree of fusion , and the laser power, arc current , the welding speed of the main factors affecting the hybrid welding , the defocus amount , and so on . Weld penetration best matching the arc power and laser power is reached , laser power of 1500W ~ 2300W , the corresponding matching of the arc current between 60A to 150A . Composite welding weld hardness lower than the laser welding, and good uniformity .
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