Sharing China-Made with Global Customers
Sharing China-Made with Global Customers
Welding technology of direct welded steel pipe:The use of small size model can avoid stress corrosion, hot cracks and deformation, electric welding current is 20% lower than high carbon steel. In order to ensure the electric lone ignition, DC reverse connection is used. The short arc welding strategy should slowly stop the lone, add charge to the lone crater, and finally weld and contact the surface layer of the material. In multi-layer high-level electric welding, the temperature of the virtual beam should be controlled, and forced water cooling can be used after welding. There is no need to arc outside the groove; wire connectors should be properly connected. Weld distortion can only be corrected by cold drawing.
Arc welding:Arc welding for straight seam steel pipe, good maintenance, good welding high temperature performance, good physical properties, aluminum alloy parts are not easy to burn, high connectivity index, good welding forming performance, no dross shell, smooth surface. At present, the manual tungsten argon arc welding market is mainly used for argon arc welding machine on 0.5 ~ 3mm stainless steel plate welding. The composition of the electrode is generally the same as the welding part.
Industrial production of pure argon is usually used to keep the vapor. During the welding process, the speed must be increased as much as possible in order to prevent lateral shaking. Argon arc welding can be used for stainless steel plates with a thickness of more than 3mm.The advantages of MIG arc welding are high output rate, small welding thermal danger zone, small welding distortion, good corrosion resistance and easy to automate the practical operation of the technology.
Gas welding:Due to the convenience of gas welding, with strong ability, can be used to weld a variety of indoor space parts. For some straight welding steel pipe components, such as thin plate structure, thin-walled pipe, etc., sometimes can also be applied in the case of non-corrosion-resistant gas welding. In order to avoid over-temperature, ultrasonic mold is generally smaller than electric welding welding the same thickness of high-carbon steel. Gas cutting flame using a neutral flame, according to the composition and properties of the welding consumables to choose the welding rod, gas cutting powder using gas flux 101, electric welding using the left electric welding method. When welding, the slope of the top of the welding torch and the welding material should be 40~50°, and the core of the flame should be about 2 mm away from the molten pool. The top of the welding rod should be in contact with the molten pool. The welding torch should not be shaken horizontally along the molten pool with the flame, and the welding should be faster and the final fracture should be minimized.
Submerged arc welding: Submerged arc welding is suitable for medium level thin, left and right straight seam welded steel pipe plate. Submerged arc welding output rate is high, electric welding cost-effective, but it is easy to lead to aluminum alloy elements and residues of segregation. Hand welding: Hand welding is a very common and convenient welding process. The arc length is adjusted by each individual, depending on the size of the gap between the metal electrode and the steel piece. In addition, when used as an arc plasma carrier, the metal electrode is the raw material for welding.
The welding process for this type of LSAW pipe is relatively simple and can be used for electric welding of essentially all raw materials. Outdoor applications, even underwater, are well adapted. Most DC welders can be used for tungsten arc welding. In electrode welding, the arc length is something that everyone has to decide: if the gap between the electrode and the steel is changed, the arc length can also be changed. In most cases, DC is used for welding and the electrode is also used as an arc plasma carrier and to add raw material.
Metal electrodes consist of an aluminum alloy or aluminum alloy core wire and an electrode coating. The coating, in addition to stabilizing the electric lone, but also used to maintain the welding rod gas damage, stainless steel electrode, titanium electrode, sealing performance. 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 easily removed. The electrodes are stored for a long time and must be baked again.