Effect of Vanadium Content on Properties of New High Strength Steel

In order to study the effect of vanadium content on the properties of Q690-0.5 Al-0.5 In high strength steel,the base chemistry Q690-0.5 Al-0.5 In steel with different vanadium contents had been prepared,and the impact and tensile properties of the samples were measured and analyzed.The results show that with the increase of vanadium content,the impact absorbing energy and strength of the sample increase firstly and then decrease slowly,but the elongation decreases firstly and then increases slowly.Compared with 0.05%V steel,the impact absorption energy of 0.2%V steel increases by 23.27%,the tensile strength and yield strength increase by 42 MPa and 25 MPa,respectively.In order to improve the properties of Q690-0.5 Al-0.5 In new high strength steel,the optimum addition of vanadium is 0.2%.