肖鸿光. 油缸用25Mn钢100 t EAF-LF-VD-软吹氩-CC流程B类夹杂物的控制[J]. 特殊钢, 2021,42(4):51-55.
肖鸿光. Controlling of Grade B Inclusion in 100 t EAF-LF-VD-Soft Ar Browing-CC Flowsheet in 25Mn Steel for Hydraulic Cylinder[J]. Special Steel, 2021, 42(4): 51-55.
肖鸿光. 油缸用25Mn钢100 t EAF-LF-VD-软吹氩-CC流程B类夹杂物的控制[J]. 特殊钢, 2021,42(4):51-55.DOI:
肖鸿光. Controlling of Grade B Inclusion in 100 t EAF-LF-VD-Soft Ar Browing-CC Flowsheet in 25Mn Steel for Hydraulic Cylinder[J]. Special Steel, 2021, 42(4): 51-55.DOI:
The measures as applying the process of Si-Ca deoxidation
controlling the total content of oxygen in the EAF molten steel and the content of Al
2
O
3
in LF slag
Control refining time ≥40 min
vacuum degassing(VD)
control soft blow time ≥20 min
and protecting cast to prevent secondary oxidation of the molten steel and promote the floating o£ inclusions in the steel are adopted at Hengsteel. The number and size of Grade B inclusion Al
2
O
3
in the molten steel are reduced to improve the cleanliness of steel. Production practice shows that controlling steel [Al
]
s≤0.004%
T[O
]
≤0.0020%
refined final slag (FeO) ≤0.8% and alkalinity (R) between 2.0 and 3.2 in liquid of hydraulic cylinder steel are available to control Grade B inclusion. Grade B inclusions not exceeding class 1.0 is beneficial to c
ontrol the production of " white spots" in the SRB process.