Flux formulation for underwater wet flux-cored arc welding of nickel- based and austenitic stainless steels

摘要

A flux formulation particularly suited for underwater wet flux- cored arc welding of nickel-based and austenitic stainless steels, such as internals of reactor pressure vessels, is free of halogen-containing components and has the following composition:PP40-80%: Rutile, Titania (TiO.sub.2),PP0-30%: Zirconium oxide (ZrO. sub.2),PP0-10%: Silicon oxide (SiO.sub.2),P P0-5%: Potassium titanate (K.sub.2 O/TiO.sub.3 at ratio of 3:1). PP0-30%: Lithium silicate (Li.sub.2 SiO.sub.3),P P0-15%: Lithium carbonate (Li.sub.2 CP.sub.3),PP provided that the sum of the contents of lithium silicate (Li.sub.2 SiO. sub.3) and lithium carbonate (Li.sub.2 CO.sub.3) be no less than 10%.