Device and method for water-cooling hot wire argon tungsten-arc welding of austenitic stainless steel tube
A technology of austenitic stainless steel and argon tungsten arc welding, applied in arc welding equipment, welding equipment, welding accessories, etc., can solve the welding characteristics that cannot exert the high efficiency of mechanical hot wire tungsten argon arc welding, increase hot cracks and welding joint sensitization, uncontrollable interlayer temperature, etc., to achieve the effect of large linear expansion coefficient, prevention of intergranular corrosion, and slow height change
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[0024] Example 1:
[0025] Austenitic stainless steel pipe water-cooled hot-wire tungsten arc welding method. First, prepare before welding, adjust the height and position of the welding torch, connect the austenitic stainless steel straight pipe and adjust the position of the cooling water supply, the gun of the welding equipment With the same gas circuit protection, when the bottom layer is welded and the pipe rotates to 270°, the cooling water valve is opened, and the spray device is used to spray and cool the welded joints until all the bottom layer, filling layer and cover layer are completed Welding.
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[0026] Example 2:
[0027] In the water-cooled hot-wire argon tungsten arc welding method for austenitic stainless steel pipes described in embodiment 1, the spray device includes nozzles with multiple apertures. When the diameter of the spray hole of the water-cooled nozzle is 0.5 mm, select When the height of the nozzle relative to the workpiece is 30-50mm, the thickness of the single-layer weld is controlled below 1.5mm.
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[0028] Example 3:
[0029] In the water-cooled hot-wire argon tungsten arc welding method of austenitic stainless steel pipe described in embodiment 1 or 2, the nozzle of the spray device is located directly below the weld and the pipe diameter ranges from φ32mm to φ70mm. The initial position of the nozzle described above is 30mm from the lower surface of the pipe; during the welding process, the adjustment range in the up and down direction is 50mm, that is, the maximum distance between the upper surface of the nozzle and the lower surface of the pipe is 80mm, based on the centerline of the welding port, left and right The direction adjustment range is ±50mm, directly facing the center of the weld; the axis of the nozzle is parallel to the axis of the pipe, and the water column sprayed by the nozzle is perpendicular to the surface of the pipe to ensure that the cooling water can be effectively sprayed to the weld Directly below.
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