Chromium stainless steel has certain corrosion resistance (oxidizing acid, organic acid, cavitation), heat resistance and corrosion resistance. It is usually selected as equipment materials for power stations, chemical industry, petroleum, etc. However, chromium stainless steel generally has poor weldability, and attention should be paid to welding process, heat treatment conditions and selection of suitable welding rods.
Chromium-nickel stainless steel welding rods have good corrosion resistance and oxidation resistance, and are widely used in chemical industry, fertilizer, petroleum, and medical machinery manufacturing. In order to prevent intergranular corrosion caused by heating, the welding current should not be too large, about 20% less than carbon steel welding rods, the arc should not be too long, and the interlayer should be cooled quickly, and narrow welds are preferred.
1. Use a power supply with vertical external characteristics, and use positive polarity when direct current (welding wire connected to negative pole)
2. Use a power supply with vertical external characteristics, and use positive polarity when direct current (welding wire connected to negative pole)
3. Wind protection and ventilation. In windy places, please take measures to block the net, and take appropriate ventilation measures indoors.
4. In order to make the argon gas protect the welding pool well and facilitate the welding operation, the center line of the tungsten electrode and the workpiece at the welding point should generally maintain an angle of 80~85°, and the angle between the filling wire and the workpiece surface should be as small as possible, generally about 10°.
stainless steel round tube
