TIG, MIG, MAG welding difference contrast

The difference between TIG, MIG and MAG welding 1, TIG welding is generally a hand-held welding gun, the other hand-held welding wire, suitable for small-scale operation and repair of manual welding. 2, MIG and MAG, welding wire through the automatic wire feeding mechanism from the welding gun, suitable for automatic welding, of course, can also be used by hand. 3. The main difference between MIG and MAG is the protective gas. The equipment is similar, but the former is generally protected by argon gas, which is suitable for welding nonferrous metals. The latter is generally mixed with carbon dioxide active gas in argon, suitable for welding high strength steel and high alloy steel. 4, TIG, MIG are inert gas shielded welding, commonly known as argon arc welding. The inert gas can be argon or helium, but argon is cheap, so it is commonly used, so inert gas arc welding is commonly called argon arc welding. Comparison of MIG welding and TIG welding Welding of Metal Inert Gas Welding (MIG) with Metal Inert Gas Welding (TIG) The welding method of arc welding with external gas as arc medium and protecting metal droplet, welding pool and high temperature metal in welding zone is called MGA shielded arc welding. Inert gas (Ar or He) shielded arc welding with solid cored wire is called molten inert gas shielded welding, referred to as MIG welding. MIG welding is the same as TIG welding except that the tungsten electrode in the welding torch is replaced by a metal wire. Thus, the welding wire is melted by an arc and fed into the welding zone. The electric drive roller sends the welding wire into the welding torch from the spool as required, and the heat source is also DC arc. But the polarity is the opposite of that used in TIG welding. The protective gas used is also different. 1% oxygen should be added to argon gas to improve the stability of the arc. Like TIG welding, it can weld almost all metals, especially aluminum and aluminum alloys, copper and copper alloys, and stainless steel. There is almost no oxidation burn loss and only a small amount of evaporation loss in the welding process. The metallurgical process is relatively simple. TIG Welding (TUNGSTEN INERT GAS WELDING), also known as non – molten Inert Gas Tungsten Welding. TIG welding is the most commonly used welding method, whether manual welding or automatic welding of 0.5 ~ 4.0mm thick stainless steel. The way of TIG welding and filament filling is commonly used in the back-up welding of pressure vessels. The reason is that TIG welding has good air tightness and can reduce the porosity of the welding seam when the pressure condenser is welded. The heat source of TIG welding is DC arc, the working voltage is 10 ~ 95 volts, but the current can be up to 600 A. The correct connection of the welding machine is that the workpiece is connected to the positive electrode of the power supply and the tungsten electrode in the welding torch is used as the negative electrode. The inert gas is generally argon gas, which is fed through the welding torch and forms a shield around the arc and on the welding pool. To increase the heat input, 5% hydrogen is generally added to argon. However, when welding ferritic stainless steels, it cannot be hydrogenated in argon. Gas consumption is about 3 to 8 litres per minute. In the welding process, in addition to blowing inert gas from the torch, it is preferable to blow gas under the weld to protect the back of the weld. If necessary, the weld pool can be filled with the same composition of the austenite material being welded, in the welding of ferritic stainless steel, usually use type 316 filler. TIG welding is widely used for welding because of the protection of argon gas to isolate the harmful effects of air on molten metal. It is easy to oxidize non-ferrous metals such as aluminum, magnesium and their alloys, stainless steel, high temperature alloy, titanium and titanium alloy, as well as refractory active metals (such as molybdenum, niobium, zirconium, etc.), and general carbon steel, low alloy steel and other common materials, in addition to the occasions of high welding quality requirements, generally do not use TIG welding.铜焊丝,Copper Welding Rods,铝焊丝,aluminium welding wire,镍焊条,Nickel electrode,药皮焊条,Flux Coated Brazing Welding Rods