What precautions should be taken when welding stainless steel nuts? Take you to learn more.
1. A power supply with vertical external characteristics is used, and positive polarity (welding wire connected to negative electrode) is used for DC.
2. Generally suitable for welding stainless steel nuts with thin plates below 6mm, it has the characteristics of beautiful weld formation 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 flow rate is 8-10L/min, and when the current is 150-250A, the argon flow rate is 12-15L/min.
4. The length of the tungsten electrode protruding from the gas nozzle is preferably 4-5mm, 2-3mm in areas with poor shielding such as fillet welding, and 5-6mm in areas with deep grooves. The distance from the nozzle to the working position generally does not exceed 15mm.
5. To prevent the occurrence of welding pores, any rust, oil stains, etc. on the welding area must be cleaned thoroughly.
6. The length of the welding arc is 2-4mm when welding ordinary steel, while 1-3mm is better when welding stainless steel. If it is too long, the protection effect is not good.
7. In order to effectively protect the welding pool of stainless steel nuts with argon gas and facilitate welding operations, the center line of the tungsten electrode should generally maintain an angle of 80-85 ° with the welded workpiece, and the angle between the filling welding wire and the surface of the workpiece should be as small as possible, usually around 10 °.
8. In order to effectively protect the welding pool with argon gas and facilitate welding operations, the center line of the tungsten electrode should generally maintain an angle of 80-85 ° with the welded workpiece, and the angle between the filling welding wire and the surface of the workpiece should be as small as possible, usually around 10 °.
9. Wind protection and ventilation. In windy areas, it is important to take measures to block the grille, while indoors, appropriate ventilation measures should be taken.