What are the advantages of argon arc welding

Argon arc welding is a welding technology developed from the principle of ordinary arc welding. The welding material is melted into liquid on the welded substrate through high current to form a molten pool. Argon is used to protectthe metal welding material and realize the metallurgical combination between the welded metal and the welding material. Due to the continuous supply of argon in high-temperature fusion welding, the oxidation of welding materials is prevented, and the welding materials will not contact with oxygen in the air.

Argonarc welding can be widely used mainly because of the following advantages.

1. Argon reduces the burning loss of alloy elements and obtains denseand high-quality welded joints; The protection can isolate the adverse effects of oxygen, nitrogen and hydrogen in the air on arcand molten pool.

2. Argon arc welding has the advantages of concentrated arc heat, stable combustion, high arc column temperature, narrow heat affected zone,high welding production efficiency and low tendency of stress,deformation and crack of weldments.

3. Argon arc welding is open arc welding, which is convenient for observation and operation

4. The arc length is easy to maintain, the electrode loss is small, andthere is no flux or coating during welding, which is easy to realize mechanization and automation.

5. Argon arc welding can weld almost most metals, such as some easily oxidized and refractory metals, such as titanium, molybdenum,magnesium, zirconium, aluminum and their alloys.

6. It can be welded in all positions without being limited by theposition of weldment.

Technology and advantages of argon arc welding backing

Argonarc welding backing can obtain high-quality welded joints. Through radio graphic inspection, the weld grade is above grade II.

Advantage

(1) Good quality: as long as appropriate welding process parameters, good gas protection and suitable welding wire are selected, the root canget good penetration, uniform penetration, smooth and neat surface,and there will be no defects such as non penetration and depression.

(2) High efficiency: the manual argon arc welding used in the first layerof pipeline welding is continuous arc welding, and the electrodecoating arc welding is broken arc welding, so the efficiency can be increased by 2 ~ 4 times. Because there is no need to clean slag and repair welds, the speed is improved faster. In the second layer ofarc welding cover, smooth and tidy argon arc welding backing is very beneficial to the arc welding cover, which can ensure good fusion between layers, especially in the welding of small-diameter pipes.

(3) The welding of the root weld of manual arc welding is easy to masterand must be completed by experienced welders with high technical level. Manual argon arc welding is adopted for priming, which can bebasically mastered by general welding workers after a short time ofpractice.