Nine precautions for welding stainless steel nuts

1. Use the power supply with vertical external characteristics, and use positive polarity (the welding wire is connected to the negative electrode) when DC.

2. It is generally suitable for welding stainless steel nuts of thin plates below 6mm. It has the characteristics of beautiful welding seam shape and small welding deformation.

3. The protective gas is argon with a purity of 99.99%. When the welding current is 50-150A, the argon gas flow is 8-10L/min, and when the current is 150-250A, the argon gas flow is 12-15L/min.

4. The length of the tungsten electrode protruding from the gas nozzle is preferably 4-5mm. It is 2-3mm in places with poor shielding such as fillet welding, and 5-6mm in places with deep grooves. The distance from the nozzle to the working is generally not enough. more than 15mm.

5. In order to prevent the occurrence of welding pores, the welding parts must be cleaned if there is rust, oil pollution, etc.

6. The length of the welding arc is preferably 2~4mm when welding ordinary steel, and 1~3mm when welding stainless steel. If it is too long, the protection effect will not be good.

7. In order to make the stainless steel nut argon gas well protect the welding pool and facilitate the welding operation, the center line of the tungsten electrode and the workpiece at the welding place should generally maintain an angle of 80-85°, and the angle between the filler wire and the surface of the workpiece should be as close as possible. Small, generally about 10°.

8. In order to make the argon gas well protect the welding pool and facilitate the welding operation, the center line of the tungsten electrode and the workpiece at the welding place should generally maintain an angle of 80-85°, and the angle between the filler wire and the surface of the workpiece should be as small as possible. Usually about 10°.

9. Windproof and ventilation. In windy places, be sure to take measures to block the net, and take appropriate ventilation measures indoors.