TIG welding technology is based on the principle of ordinary TIG #welding, using argon gas to protect the metal welding material, and through high current to make the welding material melt into a liquid state on the base material to be welded to form a molten pool, so that the welded metal and the welding material It is a #welding technology that achieves metallurgical combination of materials. Since argon gas is continuously supplied during high-temperature fusion welding, the #welding materials cannot be in contact with oxygen in the air, thereby preventing the oxidation of the welding materials. Therefore, stainless steel and iron metals can be welded. .
The reason why argon arc welding can be used so widely is mainly because of the following advantages.
1. TIG protection can isolate the adverse effects of oxygen, nitrogen, hydrogen, etc. in the air on the arc and molten pool, reduce the burning loss of alloy elements, and obtain dense, spatter-free, high-quality welded joints;
2. The arc combustion of argon arc welding is stable, the heat is concentrated, the arc column temperature is high, the welding production efficiency is high, the heat-affected zone is narrow, and the stress, deformation and crack tendency of the welded parts are small;
3. TIG welding is open arc welding, which is convenient for operation and observation;
4. The electrode loss is small, the arc length is easy to maintain, and there is no flux or coating layer during welding, so it is easy to realize mechanization and automation;
5. TIG welding can weld almost all metals, especially some refractory metals and easily oxidized metals, such as magnesium, titanium, molybdenum, zirconium, aluminum, etc. and their alloys;
6. It is not limited by the position of the weldment, and can be welded in all positions.