Wonderful Argon Gas

Argon is a colorless, odorless monatomic gas. The density of argon is 1.4 times that of air and 10 times that of helium. Argon is an inert gas that does not react chemically with other substances at room temperature and is not dissolved in liquid metal at high temperatures. It can show its superiority when welding non-ferrous metals. It can be used for inflating light bulbs and arc welding of stainless steel, magnesium, aluminum, etc., that is, "argon arc welding".
Argon is a rare gas widely used in industry. It is very inactive in nature and can neither burn nor support combustion. In the aircraft manufacturing, shipbuilding, atomic energy industry and machinery industry sectors, when welding special metals such as aluminum, magnesium, copper and their alloys and stainless steel, argon is often used as a welding shielding gas to prevent the welded parts from being oxidized or nitrided by air.
①Aluminum industry. Used to replace air or nitrogen to create an inert atmosphere during the aluminum manufacturing process; to help remove unwanted soluble gases during degassing; and to remove dissolved hydrogen and other particles from molten aluminum.
②Steelmaking. Used to displace gas or vapor and prevent oxidation in the process; used to stir molten steel to maintain a constant temperature and the same composition; help remove unwanted soluble gases during degassing; as a carrier gas, argon can be used as a layer analytical method to determine the composition of the sample; argon can also be used in the argon oxygen decarburization process (AOD) used in stainless steel refining to remove carbon monoxide and reduce the loss of chromium.
③Metal processing. Argon is used as an inert shielding gas in welding; to provide oxygen- and nitrogen-free protection in the annealing and rolling of metals and alloys; and to flush molten metal to eliminate pores in castings.
④Welding shielding gas. Argon serves as a protective gas during the welding process, which can avoid the burning loss of alloy elements and other welding defects caused by it, thereby making the metallurgical reaction during the welding process simple and easy to control to ensure high quality welding. By conducting a laser remelting test on HT250 gray cast iron, the generation mechanism of pores in the remelting zone of the sample under different atmosphere protection conditions was studied. The research results show that under argon protection conditions, the pores in the remelting zone are precipitation pores; under open conditions, the pores in the remelting zone are precipitation pores and reactive pores.
⑤Other uses. Electronics, lighting, argon gas knife, etc.