Properties of the Weld Metal of Similar Weld Filler Materials for 14 MoV 63 Steel

摘要

Properties were studied of the pure weld metal of lime-basic covered rod electrodes with 0.25 to 0.65% V for welds in 14 MoV 63 steel with about 0.5% Cr, 0.5% Mo and 0.3% V. Effect of preheating, interpass temperature and cooling rate was investigated on the formation of the structure (precipitation of oxide inclusions, precipitation forms of nitrogen and carbon) and mechanical properties of the multi-pass weld material. Properties were studied of the weld material and base metal after creep stressing or long-time annealing at 550 exp 0 C. A study was made of crack formation after annealing in the weld metal and heat-affected zone of the steel. (ERA citation 10:051807)