脱磷铁水410 t AOD-LF-CC-热轧流程304不锈钢中夹杂物的演变

特殊钢 ›› 2013, Vol. 34 ›› Issue (1): 41-44.

脱磷铁水410 t AOD-LF-CC-热轧流程304不锈钢中夹杂物的演变

陈超¹，侯海滨¹，成国光¹，潘吉祥²，李岩²，潘伟²

1北京科技大学钢铁冶金新技术国家重点实验室，北京100083；
2酒泉钢铁集团公司,嘉峪关735100

收稿日期:2012-06-20 出版日期:2013-02-01 发布日期:2022-09-14
作者简介:陈超(1989-)，男，博士研究生，不锈钢精炼和连铸工艺研究。

Evolution of Inclusions in Stainless Steel 304 during Dephosphorized Hot Metal-110 t AOD-LF-CC-Hot Rolling Process

Chen Chao¹, Hou Haibin¹ , Cheng Guoguang¹ , Pan Jixiang²，Li Yan² ，Pan Wei²

1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology, Beijing 100083 ；
2 Jiuquan Iron and Steel Group Co, Jiayuguan 735100

Received:2012-06-20 Published:2013-02-01 Online:2022-09-14

摘要/Abstract

摘要： 通过扫描电镜、能谱仪和电解分析研究了在110 t AOD-LF-中间包-160 mm板坯-连铸-热轧板卷生产过程304不锈钢(/%:0.03～0.04C、0.39～0.41Si、1.20～1.23Mn、0.014～0.016P、0.001～0.002S、7.95～8.00Ni、18.06～18.20Cr、0.003～0.004Al、0～0.002Ti)中夹杂物类型、形貌和成分。结果表明,在每一生产阶段都出现5～10μm球形SiO₂-CaO-MgO-Al₂O₃型夹杂,同时在AOD出钢过程产生20μm MnO-Cr₂O₃型夹杂,LF过程去除一部分MnO-Cr₂O₃夹杂,中间包和正常浇铸的铸坯中很少出现;但两炉连浇的铸坯易出现MnO-Cr₂O₃夹杂,热轧板中MnO-Cr₂O₃夹杂尺寸≤5μm。电解分析结果表明,两炉连浇铸坯中夹杂物数量(4.65 mg/10 kg)比正常浇铸的铸坯(3.08 mg/10 kg)增加了51%。

Abstract: Type, morphology and ingredient of inclusions in stainless steel 304 (/%: 0. 03 ~0. 04C, 0. 39 ~0. 41 Si, L20~1.23Mn, 0. 014 ~0. 016P, 0.001 ~0.002S, 7.95 〜8.00Ni, 18. 06 ~ 18. 20Cr, 0.003 ~ 0. 004Al, 0 〜0.002Ti) during 110 t AOD-LF-tundish-160 mm slab casting-hot rolling strip coil process have been studied by SEM, energy dispersive X-ray spectrometer and analysis by electrolysis. Results show that the 5 ~ 10 μm spheroidal SiO₂ -CaO-MgO-Al₂ 0₃ type inclusions occur in each steelmaking process, while the 20 μm MnO-Cr₂O₃ inclusions form in tapping process of AOD, part of which is removed in LF refining process, and they less occur in liquid in tundish and in normal casting slab, but the MnO-Cr₂O₃ inclusions easily occur in two heats sequence-casting slab, the size of MnO-Cr₂O₃ inclusion in hot-rolled strip coil is≤5μm. Electrolytic analysis results show that the inclusion amount in two heats sequence-casting slab (4. 65 mg/ 10 kg) increases by 51% as compared with that in normal casting slab (3. 08 mg/10 kg).

陈超, 侯海滨, 成国光, 潘吉祥, 李岩, 潘伟. 脱磷铁水410 t AOD-LF-CC-热轧流程304不锈钢中夹杂物的演变[J]. 特殊钢, 2013, 34(1): 41-44.

Chen Chao, Hou Haibin , Cheng Guoguang , Pan Jixiang, Li Yan and Pan Wei. Evolution of Inclusions in Stainless Steel 304 during Dephosphorized Hot Metal-110 t AOD-LF-CC-Hot Rolling Process[J]. Special Steel, 2013, 34(1): 41-44.

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