0. 10Mo) of 260 mm x260 mm and 280 mm x280 mm for heavy load railway axle at daye special steel are pilot-produced by the flow sheet 60 t UHP EBT EAF-LF-VD-6. 5 t ingot-850 primary mill rolling process. With process measures including EAF charging 45% hot metal and quality scrap
controlling end [ C
]
≥0. 15% and [ P
]
≤0.005%
feeding aluminium wire in LF refining to control 0. 035% ~0. 045% Al and VD vacuum treatment m20 min
the oxygen content in LZ45CrV steel bloom is 8. 5 x 10
-6
rating of nonmetallic inclusions ≤1.0
rating of grain size 7 ~ 8
and the mechanical properties of steel bloom meet the requirement of standard and design.