Based on the 16Mn steel, by using V-N microalloyed technology, high strength angle steel was designed. According to the pass rolling requirement, effect of V-N alloy elements, reheating temperature and rolling parameters on mechanical properties and microstructures was studied in this paper. The results showed that the amount of second phase precipitates increased and yield strength improved
... [Show full abstract] significantly with increasing of V/N content. The increment of 0. 01% V on yield strength was about 23 MPa. The dissolution temperature lower than 1150°C based on the thermodynamic calculation, a relative lower reheating temperature can increase the impact toughness of angle steel greatly. Finish rolling temperature showed great effect on yield strength and impact toughness in low V-bearing steel, but showed no obvious effect to the high V-bearing steel. Synthesis performance of angle steel was improved greatly by using V-N microalloyed technology, and mechanical properties was insensitive to the rolling parameters. V-N microalloyed technology was suitable for the angle steel mass production application.
