张勇, 康建光, 任焕, et al. Practice of Process for Steelmaking of N80-1 Oil Casing Pipe Steel by 80 t Converter-LF-VD-CC Flow Sheet[J]. Special Steel, 2010, 31(5): 33-35.
张勇, 康建光, 任焕, et al. Practice of Process for Steelmaking of N80-1 Oil Casing Pipe Steel by 80 t Converter-LF-VD-CC Flow Sheet[J]. Special Steel, 2010, 31(5): 33-35.DOI:
is melted by 80t top and bottom combined blown converter-LF-VD-Φ210 ~ 270 mm round bloom casting process. With process measures such as catch carbon and reblow practice
controlling end [C
]
controlling rephosphorization W0. 008% at tapping
and using basicity 3.2-4.0 refining slag
the P content in steel is 0.012%-0.019%
S is 0.003%-0.005%
while [O
]
(11 -22) x 10
-6
[N
]
(39 ~76) x 10
-6
and [H
]
(1.5-2.1) x 10
-6
and the analysis
structure and properti
es of steel are all meeting the requirements of consumer and standard API Spec 5CT.