钒对7Mn钢冷轧过程组织和力学性能的影响

Effect of vanadium on the microstructure and mechanical properties of 7Mn steel during cold rolling process

在7Mn中锰钢的基础上,向其添加不同含量的V元素,通过冷轧及退火处理,初步探究0.1%~0.3%V添加量对其组织和力学性能的影响规律。结果表明,当V添加量为0.3%时,试验钢的综合力学性能最优,屈服强度为993.96 MPa,抗拉强度为1164.56 MPa,伸长率为37.55%,强塑积为43.73 GPa·%,这是由于V在钢中形成细小弥散的第二相,在细晶强化、第二相强化和TRIP效应的共同作用下提高了试验钢的综合力学性能。

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 microstructure 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 elongation 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 experimental steel under the combined effects of fine grain strengthening,second phase strengthening and TRIP effect.