Flux cored wire CO2 gas shielded welding is becoming more and more popular. FCAW is also common in pressure vessels or pressure pipes, but there is a lot of controversy both in terms of experience and theory.
After the welding process or welding, metal cracking occurs in the welding area, which occurs inside or outside the weld, and may also occur in the heat affected zone.
Non-metallic inclusions such as oxides, nitrides, sulfides, phosphides, etc. are found in the weld by non-destructive testing, forming a variety of irregular shapes, and common slag inclusions such as cones and needles
The arc pit is a phenomenon that the welder machine at the end of the weld, which not only weakens the weld strength, but also causes cracks during the cooling process.
Welding methods include: tungsten inert gas welding, TIG welding, manual welding, automatic welding, etc.
TIG welding (Tungsten Inert Gas Welding), also known as non-melting inert gas tungsten welding. TIG welding is the most commonly used welding method, whether it is manual welding or automatic welding of stainless steel of 0.5 to 4.0 mm thickness.