STUDY OF C CONTENT TO VANADIUM STEEL BY DIRECT ALLOYING

摘要

Vanadium steel was made by using direct alloying method, in which, the reductant piece made by silicon, carbon and V_2O_5 powder, was directly used to reduce V_2O_5 in liquid steel. The casting ingot made by this way was gorged, normalizing treatment, and then processed into the standard tensile samples. The yielding rate of Vanadium was measured by chemical analysis and calculated. The mechanical properties of steel were tested by Universal Material Testing Machine. The inclusions in steel were observed by SEM and analyzed by EDS. The experimental results show that with increasing of C contents in reductants piece, the vanadium yielding rate of steel was enhanced, and grain was refined, thus making the yield strength of steel increased obviously. The ductility and percentage reduction of area were risen distinctly and stabilization after adding C. The inclusions in steel were strip and about 15~20 μm, and it was main included MnS or MnS, SiO_2.