陈永, 杨素波, 朱苗勇. Control Process on Corner Crack of 200 mm×200 mm Hot Rolled Billet of Steel 34Mn2V for High Pressure Bottle[J]. Special Steel, 2008, 29(6): 28-30.
陈永, 杨素波, 朱苗勇. Control Process on Corner Crack of 200 mm×200 mm Hot Rolled Billet of Steel 34Mn2V for High Pressure Bottle[J]. Special Steel, 2008, 29(6): 28-30.DOI:
The effect of temperature of liquid steel in tundish during casting
liquid level fluctuation in mold
[Als]
sequence heats of tundish and fluctuation of 280 mm×380 mm bloom casting speed on rolled billet comer cracks of steel 34Mn2V for high pressure bottle was analyzed by processes comparison. The process measures have been adopted including decreasing adding Al amount
controlling[Als]0.01%
feeding Ca-Si wire after RH
suitably increasing liquid steel temperature during cast
controlling liquid steel temperature 1520~1530 ℃ in tundish and stopper argon blown rate ≤10 L/min during casting
and controlling mold liquid level fluctuation ±3 mm.Application results showed that the hot rolled billet comer cracks rate decreased from original 23.57% to 1.21%.