1, argon protection can isolate the adverse effects of oxygen, nitrogen and hydrogen 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. Argon arc welding has the advantages of stable arc combustion, concentrated heat, high arc column temperature, high welding production efficiency, narrow heat affected zone, and low stress, deformation and crack tendency of welded parts.
3. Argon arc 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, there is no flux and coating during welding, and it is easy to realize mechanization and automation.
5. Argon arc welding can weld almost all metals, especially some refractory metals and oxidizable metals, such as magnesium, titanium, molybdenum, zirconium, aluminum and their alloys.
6, not limited by the position of weldment, all-position welding can be carried out.
Extended data:
Safety code for argon arc welding
1, the welding site must be equipped with fire prevention equipment, such as sandbox, fire extinguisher, fire hydrant, bucket, etc. Flammable articles shall not be less than 5m away from the welding site. If the specified distance cannot be reached, it can be properly covered with asbestos board and asbestos cloth to prevent Mars from falling into flammable materials. The distance between the explosive and the welding site shall not be less than 10m. The argon arc welding operation site should have good natural ventilation and fixed mechanical ventilation device to reduce the harm of harmful gas and metal dust in argon arc welding.
2. The manual TIG welding machine should be placed in a dry and ventilated place and operated in strict accordance with the instructions. Before use, the welder should be thoroughly inspected. Make sure there are no hidden dangers before turning on the power. Welding can only be carried out after no-load operation is normal. In order to ensure the welding machine wiring is correct, there must be a good and firm grounding to ensure safety. The power supply of the welding machine is controlled by the switch on the power supply board. It is forbidden to pull the switch with load to avoid burning the shape contact.
3, should always check the working condition of argon arc welding gun cooling water system, found that the blockage or leakage should be solved immediately, in case of burning torch and affect the welding quality.
4, welding personnel leave the workplace or welding machine when not in use, must cut off the power supply. If the welding machine fails, it should be repaired by professionals, and safety measures such as electric shock prevention should be taken during maintenance. Welding machine should be cleaned at least once a year.
5. The high-frequency electromagnetic field generated by the high-frequency oscillator of 5.TIG welding machine will make people feel dizzy and tired. Therefore, the time of high-frequency electromagnetic field should be reduced as much as possible when welding, and the high-frequency power supply should be cut off immediately after igniting the arc. The welding gun and welding cable shall be shielded by soft metal braided wire (one end of the hose is connected to the welding gun, the other end is grounded, and the outside is not insulated). If possible, crystal pulse arc ignition should be used instead of high frequency arc ignition.
6. When argon arc welding, the ultraviolet intensity is very strong, which is easy to cause electro-optic ophthalmia and arc burn, and at the same time, ozone and nitrogen oxides are produced to stimulate the respiratory tract. Therefore, welders should wear white canvas overalls, masks, protective gloves and foot covers when operating. In order to prevent electric shock, the ground near the workbench should be covered with insulating rubber, and the staff should wear insulating rubber shoes.
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