Flux cored wire CO2 welding, in addition to better welding quality than solid wire, its formation, spatter, beautiful sound! It can reduce the tension of welders. However, the fume level is larger than solid wire, must do a good job of protective measures. Flux cored wire supplier will explain how to weld flux cored wire.
(l) CO2 gas shielded flux cored wire arc welding has high welding quality, small spatter, high productivity, low welding costs and suitable for all-position welding, etc., and is increasingly used in the production of welding.
(2) Although CO2 gas shielded flux cored wire arc welding has the function of combined gas-slag protection, the possibility of defects such as slagging and underwelding is higher than when using CO2 gas shielded solid wire if the welding seam is not operated properly.
(3) CO2 gas shielded flux cored wire arc welding of the molten pool of molten iron, compared to CO2 gas shielded solid wire welding molten pool of molten iron thin, liquidity is greater, the shape of the molten pool is more difficult to control, the molten metal is more likely to drip, the same horizontal welding position of CO2 flux cored wire than CO2 solid wire greater operational difficulties.
(4) CO2 flux-cored welding operation skills are the same as those of CO2 solid wire, but at the same time there are differences, so mastering CO2 flux-cored welding operation technology requires better skills.
Pre-assembly positioning and welding
(1) Use angle grinding machine to remove oil, dirt, rust and scale from both sides of the bevel surface and bevel edge within 20~30mm to make it appear metallic luster. Then trim the bevel blunt edge, so that the size of the blunt edge to ensure that 1 ~ 1.5 mm.
(2) The positioning weld length is 10~15mm (positioning weld at the frontal weld), and the requirements for the welding quality of the positioning weld are the same as the formal weld.
Plate thickness of 12mm, using CO2 flux-cored wire butt cross-welding, welding seam a total of 4 layers of 11 channels. The first layer is priming welding, the second layer, the third layer of filler welding (a total of five welds), the fourth layer of cover welding (a total of five welds welded together).
(1) Bottoming welding to adjust the welding parameters of the bottoming welding as well as the welding gun nozzle, the angle between the wire and the surface of the weld and the wire transport method, using the left welding method for welding.
(2) Filler welding will be cleaned of spatter and slag on the surface of the weld channel, after debugging the welding parameters of filler welding, the second and third layer of the filler layer welding. Filler layer welding using the right welding method, filler layer welding welding speed to be slower, the thickness of the filler layer to 1.5-2mm below the surface of the base material is appropriate, and shall not melt the bevel edge corners, in order to facilitate the welding of the cover layer.
(3) Cover welding to clear the filler layer and bevel on the spatter and slag, adjust the welding parameters of the cover welding channel, welding the first weld is the key to cover welding. Cover welding from right to left welding, in order not to block the welder's line of sight, so that the weld formation is smooth and beautiful, the weld is straight and easy to control. The nozzle of the welding torch is paddling circle movement, each layer of welding to clear the slag, the welding layer between each other lap 1/2, to prevent the slag and the emergence of welding layer lap prism affect the surface weld forming beautiful.
