FLUX CORED WIRE FOR WET UNDERWATER WELDING HIGH-ALLOY NICKEL-CHROMIUM STEEL

摘要

The invention relates to the branch of welding, namely to welding materials, in particular to the self-protective flux cored wire, intended for mechanized wet underwater welding, mainly corrosion-resistant high-alloy nickel-chrome steel (for welding the underwater structures for proper purposes). A flux cored wire underwater welding high-alloy nickel-chrome steel consists of a metallic shell, made from stainless chromium steel with content of chrome 12,0...30,0 %, and a charge, which contains electrolytic nickel, metallic manganese, ferroniobium, rutile, magnesite, sodium fluosilicate, potassium-sodium silicate lump, fluorite concentrate, lithium fluoride, cryolite, zirconium tetrafluoride and aluminum powder at the following ratio of components, wt. %:At that a coefficient of filling of flux cored wire is 30.0...50.0 %. The flux cored wire provides high welding-technological properties at wet underwater welding of high-alloy nickel-chrome steel and obtaining mechanical properties of metal of weld seam and welded joint, and also quality of metal of weld seam, that meet the requirements of class B AWS/ANSI D3.6 of "Specifications for the Underwater Welding". The flux cored wire can be recommended for using for repair of underwater structures and metalwork.