Welding process of straight welded steel pipe:The small size model can avoid stress corrosion, hot cracking and deformation, and the welding current is 20% lower than that of high carbon steel. In order to ensure the arc ignition, DC reverse connection is adopted. The short arc welding strategy should slowly stop loneliness, add charging pits, and finally weld and touch the surface of the material. In the multi-layer high-rise welding, the temperature of the virtual beam should be controlled, and forced water cooling can be used after welding. No arc outside the tank; Wire connections should be properly connected. The deformation after welding can only be corrected by cold drawing.

Argon arc welding:straight seam steel pipe argon arc welding, good maintenance, high welding temperature, good physical properties, aluminum alloy components are not easy to burn, high connection index, good welding forming performance, no slag shell, smooth surface. At present, the manual tungsten arc welding market is mainly used for welding stainless steel plates by argon arc welding machine 0.5~3mm. The composition of the electrode is usually the same as the welded part. Industrial production of pure argon is often used to maintain steam. When welding, the faster the better to prevent horizontal shaking as much as possible. Argon arc welding thickness of more than 3mm stainless steel plate. MIG arc welding has the advantages of high output rate, small welding thermal risk, small welding deformation, good corrosion resistance and so on, which is convenient for the actual operation of automation technology.

Welding technology of straight seam welded steel pipe

Gas welding:Because gas welding is convenient and has strong coordination ability, it can be used to weld various indoor space components. For some directly welded steel pipe components, such as sheet structures, thin-walled pipes, etc., sometimes gas welding can be used without corrosion resistance. In order to avoid overtemperature, ultrasonic molds are usually smaller than high-carbon steel with the same welding thickness. Gas cutting flame adopts neutral flame, welding rod is selected according to the composition and characteristics of welding materials, gas cutting powder adopts gas agent 101, left welding. When welding, the slope of the top of the torch and the welding material should be 40°~50°, the flame core should be 2mm from the molten pool, the top of the electrode should be in contact with the molten pool, and the torch should not move horizontally with the flame along the molten pool, and the welding should be rapid to minimize the final break.

Submerged arc welding:Submerged arc welding is suitable for medium horizontal thin, left and right straight seam welded steel pipe plate. Submerged arc welding has high output rate and high welding cost effectiveness, but it is easy to lead to the analysis of aluminum alloy elements and residues.

Manual welding:Manual welding is a very common and convenient welding process. The length of the arc is adjusted by each individual, depending on the gap between the metal electrode and the steel part. In addition, when used as arc particle carriers, metal electrodes are the raw material for welding.

The welding process of this kind of straight welded steel pipe is relatively simple, and it can be used for welding all raw materials basically. Outdoor applications, even under water, have good adaptability. Most DC welders can use argon tungsten arc welding. In electrode welding, the arc length must be determined by each individual:if the gap between the electrode and the steel changes, the arc length can also change. In most cases, the DC is used for welding, and the electrodes are also used as arc particle carriers and added raw materials.

The metal electrode is composed of aluminum alloy or aluminum alloy core wire and electrode coating. In addition to stable electric solitons, the coating is also used to maintain gas damage to the electrode. Stainless steel electrodes and even titanium electrodes also have sealing properties. It depends on the thickness and composition of the skin. Titanium electrodes are easy to weld. The electrode is smooth, beautiful and generous. In addition, the electrodes are easy to remove. The electrodes are stored for a long time and must be baked again.