Influence of Controlling Molten Steel Superheat on Technology of Concasting and Quality of Billet

• Published in: Teshugang
• Main Authors: Lu Lu, Lu Kaiyi
• Format: Article
• Language: Chinese
• Published: Editorial Office of Special Steel 2008-01-01
• Subjects: Superheat of Molten Steel; Concasting Process; Quality of Billet
• Online Access: http://www.specialsteeljournal.com/thesisDetails?columnId=129772837&Fpath=home&index=0

The controlling molten steel superheat of GCrl5, 60Si2Mn, 40Cr and 0.20C steel in 25 t ladle and 16 t tundish has been studied. The controlling of molten steel superheat was mainly depended on temperature decreasing speed of molten steel as the heat storage process of ladle line came to equilibrium state - temperature decreasing speed of molten steel in ladle ≤l ℃/min and that in tundish ≤0.5 ℃/min； as superheat of molten steel was between 15 T and 35 T , the equiaxial crystal ratio in 200 mm x 200 mm billet was up to 20%-30% , the ratio of casting breaking out ≤0.23% , and it was available to get better quality of billet.