Effect of Converter-LF Refining and Hot Metal Pretreatment Converter-Ladle Argon Stirring Process on Metallurgical Quality of Weathering- Resisting Steel
郭宏海, 宋波, 刘西峰, et al. Effect of Converter-LF Refining and Hot Metal Pretreatment Converter-Ladle Argon Stirring Process on Metallurgical Quality of Weathering- Resisting Steel[J]. Special Steel, 2010, 31(1): 33-35.
郭宏海, 宋波, 刘西峰, et al. Effect of Converter-LF Refining and Hot Metal Pretreatment Converter-Ladle Argon Stirring Process on Metallurgical Quality of Weathering- Resisting Steel[J]. Special Steel, 2010, 31(1): 33-35.DOI:
Test to melt weathering-resisting steel SPA-H ( % : W0. 12C
0. 30 ~ 1. 25Cr
0. 25 ~ 0. 55Cu) by both processes of 60 t converter (liquid temperature 1 653℃ )- LF refining (slag basicity 2. 5 ~3. 0
feeding Al wire
Ar stirring) and hot metal pretreatment ([S
]
≤0. 010% ) -60 t converter (liquid temperature 1 670 °C
adding 80 ~ 100 kg refining slag during tapping) -ladle feeding Al wire and Ar stirring ≥8 min has been carried out. Results by 62 heats practice show that for heats with LF refining
[O
]
before argon stirring is 37. 7 x 10
-6
feeding wire 25 kg
average [S
]
is 0. 014% ; and for heats without LF refining
[O
]
before argon stirring is 53. 3 X 10
-6
feeding wire 33. 9 kg
average [S
]
is 0. 017% ; the mechanical properties and inclusion ra
ting of weathering-resisting steel produced by both processes all meet the requirement
but the process without LF refining is available to increase productivity and reduce consumption of materials.