Stainless steel welded pipe has excellent corrosion resistance, high strength and good processing performance, and is widely used in many industrial fields such as food processing, chemical industry, medical treatment, construction and so on. TIG welding, or tungsten inert gas welding, is the core and efficient process for welding stainless steel pipes.
In the TIG welding process, the high melting point tungsten rod acts as the electrode, and the welding area is completely isolated from the air under the full protection of inert gases such as argon. This effectively prevents the intrusion of oxygen, nitrogen, etc., avoids the oxidation of weld metal and the mixing of impurities, and ensures the high purity and high quality of the weld. Its stable welding arc can accurately control the heat input, which is crucial for heat-sensitive stainless steel, can significantly reduce welding deformation, and effectively ensure the dimensional accuracy and appearance quality of welded pipes.
During operation, it is very important to strictly control the welding parameters. If the welding current is too large, the weld is prone to burn-through, edge biting and other defects; Too small will lead to non-penetration, poor fusion. Appropriate current and appropriate voltage can ensure uniform weld penetration and width. The welding speed can not be ignored, too fast will make the weld metal fusion is not enough, resulting in porosity, incomplete welding and other problems; Too slow will lead to overheating of the weld, coarse grain, reduce mechanical properties. Argon flow rate is also critical, too large flow to form turbulent flow into the air, too small can not effectively protect the welding area, the appropriate flow can provide a reliable protective barrier for the welding area. At the same time, it is necessary to clean the surface of the welded pipe before welding to remove impurities such as oil and rust, otherwise these impurities decompose and produce gas during welding, which will cause defects such as pores and slag inclusion in the weld, seriously affecting the welding quality.
It is with these advantages that TIG welding lays the foundation for the high-quality manufacturing of stainless steel welded pipes. In the food processing industry, to ensure that the food pipeline without weld defects, to ensure food safety; In the chemical industry, corrosion-resistant welds ensure the safe transmission of highly corrosive media in pipelines; In the medical industry, high-quality welds meet the high precision and high safety requirements of medical devices. TIG welding plays an irreplaceable role in an industry where the quality of pipes is demanding.
Related: stainless steel pipe production line, high-speed welded steel pipe production line
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