Study on A-TIG welding technology for austenitic stainless steel welding

Process characteristics of ATIG welding and development trend at home and abroad are introduced in this paper. The effect of active flux for ATIG welding on welding penetration of 0Cr18Ni9 austenitic stainless steels weld is investigated. Two kinds of welds made respectively by TIG welding and ATIG welding are compared and evaluated on the basis of tests, including their mechanical properties, chemical composition, metallographic microstructure, ferrite content and intercrystalline corrosion resistance, etc. The results indicate that ATIG welding can result in a significant increase in welding penetration of austenitic stainless, while its weld properties are as good as those by TIG welding. Thus ATIG welding can improve productivity of austenitic stainless steels welding.