Argon arc welding is a welding technique that uses argon gas as a shielding gas. Also known as argon gas shielded welding. It is to apply argon shielding gas around the arc welding area to isolate the air outside the welding zone and prevent oxidation of the welding zone.

Argon arc welding technology is a welding technique based on the principle of ordinary arc welding, which uses argon gas to protect the metal welding material. Through high current, the welding material melts into a liquid state on the welded substrate to form a molten pool, achieving metallurgical bonding between the welded metal and the welding material. Due to the continuous supply of argon gas in high-temperature fusion welding, the welding material cannot come into contact with oxygen in the air, thus preventing oxidation of the welding material. Therefore, stainless steel and iron hardware metals can be welded.

Argon arc welding is divided into two types according to the different electrodes: melting electrode argon arc welding and non melting electrode argon arc welding.

The working principle of argon arc welding in the main circuit, auxiliary power supply, drive circuit, protection circuit, etc. is the same as that of manual arc welding. We will not elaborate further here, but will focus on introducing the unique control functions and arc starting circuit functions of argon arc welding machines.

The reason why argon arc welding can be widely used is mainly due to the following advantages.

1. Argon protection can isolate the adverse effects of oxygen, nitrogen, hydrogen, and other gases in the air on the arc and molten pool, reduce the burning loss of alloy elements, and obtain dense, splash free, and 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. Argon arc welding is open arc welding, which is easy to operate and observe;

4. The electrode loss is small, the arc length is easy to maintain, and there is no flux or coating layer during welding, making it easy to achieve mechanization and automation;

5. Argon arc welding can weld almost all metals, especially some refractory and easily oxidizable metals such as magnesium, titanium, molybdenum, zirconium, aluminum, and their alloys;

6. Unrestricted by the position of the weldment, full position welding can be performed.