METHOD FOR MAKING ROD BLANK OF CONTACT WIRE Russian patent published in 2002 - IPC

FIELD: metallurgy, namely combined processes of continuous casting and rolling of metals. SUBSTANCE: method comprises steps of casting to mold basic melt metal, alloying it by alloying component at introducing rod or rods of alloying component into stream of liquid metal and(or) to heel of melt in such place of cross section of mold where it is necessary to saturate melt with alloying component. Alloying may be realized by introducing first rod of one alloying component to stream of liquid metal in order to increase temperature of recrystallization and by introducing other rod into heel of melt in such place of cross section of mold where it is necessary to saturate melt in order to provide high rigidity and strength of rod blank. In order to provide small difference of concentration of alloying component along cross section of blank, alloying component is introduced to stream of liquid metal. In order to provide large difference of concentration of alloying component along section of blank, rod is introduced to respective place of cross section of melt heel. EFFECT: possibility for making without heat treatment rods for contact wire having high electromechanical properties, different physico-mechanical properties along height of wire section, lower portion with higher strength and rigidity, upper portion with high electrical conductance, less loss of alloying component for slagging. 2 cl