1.
Stainless steel tube with vertical external power supply, DC positive polarity (wire connected negative).
2. Generally suitable for 6mm thin plate welding, weld appearance, a small amount of welding deformation.
3. The shielding gas is argon with a purity of 99.99%. When the welding current is 50-50A, the argon flow rate is 8-0L / min. When the current is 50-250A, the argon gas flow rate is 2-5L / min.
4. Tungsten protruding from the gas nozzle length to 4-5mm is better in the fillet welding and other poor shielding is 2-3mm, where the deep groove is 5-6mm, the nozzle to the work of the general does not exceed the distance 5mm.
5. To prevent the emergence of welding pores, stainless steel pipe welding rust, oil, etc. must be cleaned.
6. Welding arc length, welding ordinary steel, preferably 2-4mm, while welding stainless steel tube, 3mm is better, too long, then the protection effect is not good.
7. Docking primer, in order to prevent the back of the bottom weld is oxidized, the back also need to implement gas protection.
8. In order to make the argon well protect the weld puddle and to facilitate the welding operation, the tungsten centerline should be kept at an angle of 80-85 °to the workpiece at the welding place. The included angle between the filler wire and the workpiece surface should be as small as possible, Generally 0 °or so.
9. Wind and ventilation. Windy areas need to be blocked to reduce the impact of wind power, while indoors should take appropriate.
