1. The scope of use of the nut is generally to weld a thin plate of about 6mm, which can avoid large deformation of the welding, and at the same time, it can have a more beautiful weld after welding.

2. Direct current should be used when welding, and the negative electrode should be connected to one end of the welding wire.

3. The oil stains, rust and other dirt on the welding part should be removed before welding to avoid welding pores.

4. Argon with a purity of 99.99% should be used as the protective gas, and when the current is between 50-150A, the argon flow should reach 8-10 liters per minute, and when the current is between 150-250A, argon The air flow should reach 12-15 liters per minute.

5. During the welding process, the working environment should be kept ventilated, and the air should be ventilated indoors. At the same time, shielding must be used for protection during welding.

6. During the welding work, the angle between the welding part and the center line of the tungsten electrode should be kept between 80-85°. The advantage of doing so is to better protect the welding pool.

7. The angle between the filler wire and the welding surface should be kept within 10°.

8. The length of the tungsten electrode protruding from the gas nozzle is about 5mm, and the length at the corners or other relatively exposed places is controlled to about 2-3mm, and the length in the deep part should be longer, about 6mm.