COATING FOR ELECTRODES EMPLOYED IN WELDING HETEROGENOUS DUPLEX STAINLESS STEEL-CARBON STEEL JOINTS

摘要

The invention relates to a basic coating for electrodes employed in manual electric welding between duplex stainless steel and carbon steel for the deposition of layers of the type 18% Fe, 8% Cr, 6% Ni, 2.5% Mn, and W, said coating enhancing the efficiency of weld coating by depositing layers having increased breaking resistance. According to the invention, the electrode coating consists of an alloy system comprising 15-19% metallic Mn, 5-8% finely grained W and 0.5-1.5 rare earths of the basic slagging system comprising 30-34% marble, 20-24% fluorite and 7% titanium dioxide, with burning compensation addition of 6-10% metallic Cr and refining-deoxidizing addition of 2-4% FeSi 45, 1-3% FeMn 45 and 2.5% plasticizers or binders which represent 17-19% of the total powder mass.