Controlling Practice on Total Oxygen Content in Gear Steel Slab Produced by BOF-LF-CC Process
FENG Nian
Abstract：The 20CrMnTiH gear steel was produced by BOF-LF-CC process in Laiwu Steel. In the condition of without VD furnace vacuum processing, through adopting some process optimization measures such as increasing the hit-rate of carbon content in converter endpoint, using combined stopping slag technology, optimizing converter bottom blowing flow rate and the ladle bottom blowing argon mode, adopting full aluminum deoxidation, adjusting the refining slag system, improving the sealing of long nozzle for avoiding secondary oxidation of the molten steel and setting vibration slag detection system, the total oxygen content in the cast slab was decreased effectively. The average total oxygen content reached 0.001 3%.
Keywords：gear steel20CrMnTiH steelcast slabtotal oxygen contentBOF-LF-CC process
Publication Date：2014-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 6-8 )