Stainless steel welding introduction

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Stainless steel welding introduction

1. Power supply with vertical external characteristics, positive polarity when DC (wire connected to negative electrode)

2. Generally suitable for welding of thin plates below 6mm, with beautiful weld bead and small deformation of welding.

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 flow rate is 2~5L/min.

4. The length of the tungsten electrode protruding from the gas nozzle is preferably 4~5mm, and is 2~3mm in the place where the shielding property such as fillet welding is poor, and 5~6mm in the deep groove, the distance from the nozzle to the working is generally not More than 5mm.

5. In order to prevent the occurrence of welding air holes, the welding parts must be cleaned such as rust and oil.

6. Welding arc length, when welding ordinary steel, it is better to use 2~4mm, while when welding stainless steel, it is better to use ~3mm. If it is too long, the protection effect is not good.

7. When the butt is bottomed, in order to prevent the back side of the bottom bead from being oxidized, gas protection is also required on the back side.

8. In order to make the argon gas protect the weld pool well and facilitate the welding operation, the tungsten center line and the welding workpiece should generally maintain an angle of 80~85°, and the angle between the filler wire and the workpiece surface should be as small as possible. Generally it is around 0°.

9. Wind and ventilation. In windy places, take measures to block the net, and indoors should take appropriate ventilation measures.

Stainless steel welding introduction

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