1.1   TIG

TIG welding, known as tungsten inert gas shielded welding, is an important and commonly used welding method in modern industrial engineering. It protects the electrodes and the arc as well as the welding metal by adding an inert gas as a heat source by burning the arc between the non molten electrode and the welding piece, so that it is separated from the air.

In the welding process, tungsten is not melted, the arc is relatively stable, easy to control the quality of welding, can be filled with wire, also cannot be filled, not only for welding sheet, but also to weld thicker plate, arc heat concentration, welding sheet when the workpiece degeneration is small, easy to achieve mechanization and automatic welding.

Because of the special chemical properties of aluminum, often in the welding surface form a layer of alumina, affecting the normal TIG welding, at the same time because aluminum has a very strong thermal conductivity, welding temperature control is more difficult, so in the past, the aluminum welding process often encountered many difficulties. With the development of technology in recent years and the continuous efforts of relevant practitioners to study, the TIG welding technology of aluminum and aluminum alloy has a great breakthrough, overcome many difficulties, so that TIG welding has been widely used.