A high-efficiency welding method for thick plate narrow gap double-beam laser wire filling
A technology of laser wire filling and welding method, which is applied in the direction of laser welding equipment, welding equipment, metal processing equipment, etc., and can solve the problems of reducing the filling area of the groove, welding crystal cracks in the center of the welding seam, and laser rooting welding of large thickness blunt edges. Solve problems such as liquid column and spatter, achieve the effect of improving filling efficiency, less weld metal, and suppressing molten pool liquid column and welding spatter
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Embodiment 1
[0037] The welding of high-strength steel thick plate with a thickness of 120mm is carried out. The specific welding process is as follows:
[0038] Step 1: The test base material is 10Ni5CrMoV high-strength steel, the profile state is quenched and tempered, the plate size is 500×200×120mm, and the joint form is a double-sided butt joint, such as image 3 As shown in the figure, a 1° bevel is opened, the gap at the root of the bevel is 3.2mm, and the blunt edge of the bevel is 40mm thick. The welding wire used is JS80 welding wire with a diameter of Φ1.2mm.
[0039] Step 2: Use 10,000-watt high-power laser deep penetration welding to achieve double-sided double-pass penetration welding with large thickness and blunt edges, and realize efficient bottom welding; use dual-beam laser gradient cooling to control the efficient filling welding process, and select a large wire feeding amount Filling, increase the amount of deposited metal in a single-layer filling bead, and improve t...
Embodiment 2
[0043] The welding of high-strength steel thick plate with a thickness of 40mm is carried out. The specific welding process is as follows:
[0044] Step 1: The test base material is 10Ni5CrMoV high-strength steel, the profile state is quenched and tempered, the plate size is 500×200×40mm, the joint form is a single-sided groove, the plate thickness is 40mm, the thickness of the blunt edge of the groove is 10mm, and the root gap is It is 3.2mm, the groove angle is 1°, and the welding wire used is JS80 welding wire with a diameter of Φ1.2mm.
[0045] Step 2: Use 10,000-watt high-power laser deep penetration welding to realize single-pass penetration welding with large thickness and blunt edge, and realize efficient bottoming welding; use dual-beam laser gradient cooling to control the high-efficiency filling welding process, and select large wire feed for filling, Increase the amount of deposited metal in a single-layer filled bead and improve the single-pass filling efficiency....
Embodiment 3
[0049] The difference between this embodiment and Embodiment 1 is that in step 2, the front beam laser is oscillated, the defocus amount is +5 mm, the swing amplitude is 2 mm, and the swing frequency is 60 Hz.
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