李宝秀. Effect of Nitrogen Content on Structure and Mechanical Properties of 500E Anti-Quake Reinforced Bar Steel 20MnVN[J]. Special Steel, 2016, 37(5): 59-61.
李宝秀. Effect of Nitrogen Content on Structure and Mechanical Properties of 500E Anti-Quake Reinforced Bar Steel 20MnVN[J]. Special Steel, 2016, 37(5): 59-61.DOI:
研究的Φ5 mm 500E抗震钢筋20MnVN(/%:0.19~0.20C,0.23~0.26Si,1.26~1.31Mn,0.016~0.023P,0.006~0.012S,0.10~0.11V,0.0038~0.0163N)的生产流程为50t顶底复吹转炉-LF-160 mm×160 mm方坯连铸-控轧控冷工艺。结果表明
The production flowsheet for studied Φ5 mm 500E anti-quake reinforced bar steel 20MnVN (/% : 0.19-0.20C
0.23-0.26Si
1.26-1.31Mn
0. 016-0.023P
0.006-0.012S
0.10-0.11V
0.0038-0.0163N) is 50 t top and bottom combined blowing converter-LF-160 mm x 160 mm billet casting-rod control rolling and control cooling process. The results show that with increasing the nitrogen content in steel
the tough dimples of tensile fracture of 500E 20MnVN steel coil become deeper and their diameters become larger
and the ferrite content in structure increases from 63.6% to 74.8% ; increasing nitrogen content is available to increase the yield strength
tensile strength and elongation of 20MnVN steel coil
and with increasing the nitrogen content in steel from 0. 003 8% to 0.016 3%
the yield strength
tensile strength and elongation of steel increases respectively from 513 MPa
650 MPa and 10.5% to 571 MPa
703 MPa and 13.0%. The V-N microalloying and V(C
N) precipitated strengthening-toughing mechanism is analyzed.