Welding method of duplex stainless steels
A duplex stainless steel, welding method technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., to achieve the effect of reducing welding spatter and beautiful weld formation
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[0017] Take a pipe interface with a wall thickness of 9 mm as an example, using 99.99% argon inert gas protection to perform manual argon arc welding for bottom welding. The first power source selected is Panasonic TSP-300 manual / argon arc welding machine. The polarity is DC positive connection, the molten pool shielding gas is 99.99% argon, the flow rate is 14 liters / min, the back shielding gas is 99.99% argon, the argon arc welding wire is Lincoln LNT4462φ2.0, AWSA5.9: ER2209, the tungsten electrode is thorium Tungsten pole φ2.4, ANSI / AWSA5.12-92, the welding position is fixed horizontally, the wall thickness is 9 mm, the joint is formed as a butt V-shaped interface, the groove angle is 60°, the blunt edge is 1 mm, and the gap is 4 Mm. Fix the aligned workpieces horizontally on the welding frame, leaving only the gas inlet and outlet ports in the sealed pipe mouth, and pass argon gas as the shielding gas for 4 minutes in the pipe, and the gas flow rate is 8 liters / min; the ce...
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