Plus welding filler metal can also be without filler metal

 Plus welding filler metal can also be without filler metal. Plasma arc welding, the arc because of its straight, energy density, which arc penetration ability. Plasma arc welding holes generated effects, a certain thickness range for most metals can not open groove butt, and to ensure uniform penetration and weld. Thus, plasma arc welding of high productivity, weld quality. However, plasma arc welding equipment (including nozzle) is more complex, the control of welding parameters higher. Gas tungsten arc welding can weld most metals, plasma arc welding can be used. In contrast, for less than 1mm thin metal welding, plasma arc welding can be easily used for.Therefore, the welding electrode and the workpiece before the workpiece and the workpiece and the contact surface cleaning. Spot welding, seam welding and projection welding of Wu is the welding current (single phase) large (thousands to tens of thousands of amperes), power-on time is short (a few weeks to a few seconds wave), expensive equipment, complex, high productivity, thus suitable for large mass production. Mainly used for welding sheet metal components of thickness less than 3mm. Various types of steel, aluminum, magnesium and other nonferrous metals and alloys, stainless steel can be welded. Focused electron beam welding is a high-speed electron beam surface when the heat welding method. Electron beam welding, electron beam generated by the electron gun and accelerated.
Electroslag welding of the advantages are: weldable workpiece thickness (from 30mm to greater than 1000mm), the production rate. Used in cross-section butt joints and T joints welded.
Electroslag welding can be used for a variety of welding steel structures can also be used for welding castings. Electroslag welding heads are slow due to heating and cooling, heat affected zone width, coarse microstructure, toughness, so welding is generally required to be normalized after treatment. Frequency resistance welding is a solid with heat energy. Welding using high-frequency current in the resistance heat generated within the workpiece so that the workpiece is heated to melt the welding zone or near the surface of the plastic state, then apply (or not applied) forging force to achieve a combination of metal. Therefore, it is a solid-phase resistance welding method. High-frequency welding parts according to high-frequency current generated in the heat of welding can be divided into contact with high frequency and high frequency induction welding. Exposure to high-frequency welding, high frequency current through mechanical contact with the workpiece incoming workpiece. High frequency induction welding, high frequency induction loop current through the workpiece external coupling and induced current in the workpiece.
Strong high-frequency welding is specialized welding method, according to the product is equipped with special equipment. Production rate, welding speed up to 30m/min. When the tube is mainly used for manufacture of longitudinal seam or spiral seam welding.As mentioned earlier, electroslag welding slag resistance heat is the energy of the welding method. Welding process in the vertical welding position, and in the end by the two sides of the workpiece to form water-cooled copper block assembly within the gap. Slag welding current through the use of resistance heat generated will melt the end of the workpiece.