COMPOSITE WELDING WIRE FOR HIGH-STRENGTH ALLOYED STEEL ARC WELDING

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FIELD : metallurgy. SUBSTANCE : wire comprises a metal rod and anelectrolytically applied thereto nanocomposite coating incudling a metal matrix with distributed therein nanoparticles. The matrix contains nanoparticles of fluoride or fluoride mixture of rare-earth metal and nano-sized particles of a refractory metal boride in the following ratio of matrix volumes and nanoparticles in the coating, % : metal matrix 55-96, nanoarticles of fluoride or fluoride mixture of rare-earth metal 3-20, nanoparticles refractory metal boride 1-25. Rare-earth metal fluoride was selected from the group consisting of lanthanum fluoride, yttrium fluoride, and cerium fluoride. Titanium boride or zirconium boride is used as refractory metal boride. EFFECT : welding wire increases strength, ductility, and toughness of alloyed steel welds. 3 cl, 6 tbl