Effect of vanadium on the microstructure and mechanical properties of 7Mn steel during cold rolling process
On the basis of 7Mn medium manganese steel,different contents of V element were added.Through cold rolling and annealing treatment,the influence of 0.1％～0.3％V addition on the micro-structure and mechanical properties of the steel was preliminarily explored.The experimental results show that when the content of V is 0.3％,the comprehensive mechanical properties of the experimental steel are the best.The yield strength is 993.96 MPa,with the tensile strength 1164.56 MPa,the elonga-tion 37.55％,and the strength and elongation product 43.73 GPa·％.This is because V forms a fine and dispersed second phase in the steel,which improves the comprehensive mechanical properties of the ex-perimental steel under the combined effects of fine grain strengthening,second phase strengthening and TRIP effect.
medium manganese steelV microalloyingTRIP effectmechanical properties
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