Morphology Control of Welding Seam for GH3128 Thin Plate by Ring Core Combined Fiber Laser
The welding problem of aircraft engines is a major challenge due to the different inlet and outlet ends of the internal flow channel structure,and how to achieve continuous and controllable weld penetration in actual welding has become a research focus.A study on laser lap welding of ring core combined fiber was carried out for GH3128 superalloy.The process parameters of welding depth of 1.5 mm were obtained through pure core laser welding,and actual welding depth of 1.51～1.81 mm and width of 0.25～0.75 mm were obtained through ring core combined welding.The propagation law of the core beam and ring beam of the combined fiber laser,as well as the reasons for controlling the morphology of welding seam,were analyzed.The analysis result showed that the addition of a circular beam is beneficial for reducing the temperature gradient of the laser beam on the material surface,thereby affecting the formation of the welding seam.Through laser welding with a ring core combination,GH3128 thin plate welding seam with a fusion depth which is reasonable and width which is continuous and controllable can be obtained.
NETL
NSTL
万方数据
