Yang Jichun, Zhang Jian, Li Hongwei, Zhou Li. Influence of Vanadium on Microstructure and Properties of High Nitrogen 20MnSi Steel[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 43-47. doi: 10.7513/j.issn.1004-7638.2015.01.008
Citation:
Yang Jichun, Zhang Jian, Li Hongwei, Zhou Li. Influence of Vanadium on Microstructure and Properties of High Nitrogen 20MnSi Steel[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 43-47. doi: 10.7513/j.issn.1004-7638.2015.01.008
Yang Jichun, Zhang Jian, Li Hongwei, Zhou Li. Influence of Vanadium on Microstructure and Properties of High Nitrogen 20MnSi Steel[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 43-47. doi: 10.7513/j.issn.1004-7638.2015.01.008
Citation:
Yang Jichun, Zhang Jian, Li Hongwei, Zhou Li. Influence of Vanadium on Microstructure and Properties of High Nitrogen 20MnSi Steel[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 43-47. doi: 10.7513/j.issn.1004-7638.2015.01.008
The effect of vanadium on the microstructure and mechanical properties of 20 MnSi thread steel with high content of nitrogen was studied,and the fracture morphology of the tested samples was analyzed by scanning electron microscopy. The results show that the grain size of 20MnSi thread steel decreases from 8.6 μm to 1.9 μm with increasing content of vanadium but the precipitates of cementite are not flat and straight. Mechanical properties of the thread steel containing 0.039% vanadium are significantly improved with yield strength reaching 944 MPa,1 100 MPa of tensile strength,26% of elongation and yield ratio 0.85. The brittle zone of 20MnSi thread steel is found to transform into plastic zone with increasing content of vanadium and disappear with 0.047% vanadium.
DownLoad: