Vanadium - Transforming Possibilities

Study of V-N Microalloyed Steels for Reinforcing Bars

Abstract:

This paper investigated the effect of adding nitrogen-enriched vanadium alloy (Nitrovan12) on mechanical properties of the 20MnSi rebar steels. The experimental results show that, under the same level of vanadium content, the tensile strength and yield strength of the N-enhanced steels added Nitrovan12 increases by 135MPa and 117.5 MPa compared to the steels added 80%FeV. Nitrogen promotes the precipitation of V(C,N) in V-bearing steel and improves effect of precipitation strengthening of vanadium. To attain the desired strength level, vanadium addition can be reduced over 33.3% by using Nitrovan12 additive compared to 80%Fe V. The experimental results indicated clearly that nitrogen is an efficient alloy element for vanadium-bearing steel. Based on the research results, an economical grade III reinforcing bars was developed.