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Argon arc welding is a gas tungsten arc welding method that uses the inert gas argon as the shielding gas.
Advantages:
① High weld seam quality. Since argon gas is an inert gas and does not react chemically with metals, alloying elements will not be burned off. Argon gas also does not melt with metals, so the welding process is basically a process of metal melting and solidification. Therefore, good protection can be achieved, resulting in purer and higher-quality weld seams.
② Low welding deformation stress. Due to the compression and cooling effect of the argon gas flow on the arc, the arc heat is concentrated and the temperature of the argon arc is high. As a result, the heat-affected zone is small, resulting in low stress and deformation during welding. It is particularly suitable for thin-walled component welding and pipe root welding.
③ Wide welding range, suitable for welding almost all types of metal materials, especially suitable for welding chemically active metals and alloys.
Plasma arc welding is a fusion welding method that uses a high-energy density beam of plasma arc as the heat source
Advantages:
① High welding arc stiffness, strong penetration capability using the principle of small hole effect welding. It uses high-purity inert argon gas (purity: 99.999%) for welding seam protection (protecting the center of the weld pool, trailing shield protection at the end of the pool, and backside protection of the weld seam). It can easily achieve single-side welding with double-sided forming of the weld seam, ensuring stable welding quality and no welding defects inside the weld seam.
② Concentrated welding arc energy, narrow heat-affected zone of the weld, no embrittlement in the heat-affected zone, high toughness and plasticity of the weld seam.
③ Low heat input, minimal welding deformation, effectively improving the corrosion resistance of the weld seam and prolonging the product’s service life.
④ The entire welding process adopts automatic arc length tracking, and the welding gun is equipped with a circulating water cooling system, which can achieve high-speed and long-term fully automated welding. The welding efficiency is much higher than that of ordinary welding methods.
⑤ After welding, the main weld seam undergoes 100% X-ray inspection, with a minimum quality grade not lower than AB, and the qualified level of the weld seam is Grade II. The first-pass RT (radiographic testing) inspection pass rate for the weld seam is 100%.
Plasma arc welding is a fusion welding method that uses a high-energy density beam of plasma arc as the heat source
Advantages:
① High welding arc stiffness, strong penetration capability using the principle of small hole effect welding. It uses high-purity inert argon gas (purity: 99.999%) for welding seam protection (protecting the center of the weld pool, trailing shield protection at the end of the pool, and backside protection of the weld seam). It can easily achieve single-side welding with double-sided forming of the weld seam, ensuring stable welding quality and no welding defects inside the weld seam.
② Concentrated welding arc energy, narrow heat-affected zone of the weld, no embrittlement in the heat-affected zone, high toughness and plasticity of the weld seam.
③ Low heat input, minimal welding deformation, effectively improving the corrosion resistance of the weld seam and prolonging the product's service life.
④ The entire welding process adopts automatic arc length tracking, and the welding gun is equipped with a circulating water cooling system, which can achieve high-speed and long-term fully automated welding. The welding efficiency is much higher than that of ordinary welding methods.
⑤ After welding, the main weld seam undergoes 100% X-ray inspection, with a minimum quality grade not lower than AB, and the qualified level of the weld seam is Grade II. The first-pass RT (radiographic testing) inspection pass rate for the weld seam is 100%.
Plasma arc welding is a fusion welding method that uses a high-energy density beam of plasma arc as the heat source. After welding, the main weld seam undergoes 100% X-ray inspection, with a minimum quality grade not lower than AB, and the qualified level of the weld seam is Grade II. The first-pass RT (radiographic testing) inspection pass rate for the weld seam is 100%.
It is a welding method using a mixture of a small amount of oxidizing gas (CO2, O2, or other mixed gases) added to argon gas as the shielding gas for welding.
Advantages:
① The temperature of the weld pool and droplet is higher than that of pure argon arc welding, and the current density is larger, consequently resulting in a greater depth of fusion, thicker weld seam, faster melting speed of the welding wire, higher deposition efficiency, and improved welding productivity.
② CO2 gas is relatively inexpensive, which reduces the welding cost.
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