120 t RH自然脱碳精炼低碳钢QD08的生产实践

特殊钢 ›› 2018, Vol. 39 ›› Issue (3): 13-16.

120 t RH自然脱碳精炼低碳钢QD08的生产实践

李海, 刘列喜, 张洪彪, 介瑞华, 王立青, 陆曼, 徐雷

芜湖新兴铸管有限责任公司炼钢部，芜湖241000

收稿日期:2017-12-05 出版日期:2018-06-01 发布日期:2022-06-02
作者简介:李海(1985-),男，硕士(2012年内蒙古科技大学)，工程师,2008年内蒙古科技大学(本科)毕业，二次精炼研究和品种开发。

Production Practice for Low Carbon Steel QD08 Steelmaking by Natural Decarburization during 120 t RH Refining Process

Li Hai, Liu Liexi, Zhang Hongbiao, Jie Ruihua, Wang Liqing, Lu Man , Xu Lei

Steelmaking Division, Wuhu Xinxing Casting Pipe Co Ltd, Wuhu 241000

Received:2017-12-05 Published:2018-06-01 Online:2022-06-02

摘要/Abstract

摘要： 基于生产数据对120 t RH精炼低碳钢QD08(/%:≤0.07C,0.15～0.35Si,0.25～0.45Mn,≤0.035P,≤0.035S)进行了RH碳氧反应的热力学、动力学分析和自然脱碳分析,得出RH精炼自然脱碳的优化工艺。结果表明,BOF终点温度≥1650℃,RH初始温度≥1 600℃,BOF终点[C]0.04%～0.10%,[P]≤0.018%,出钢前加顶浇石灰200 kg,出钢不加合金和脱氧剂,RH真空度4～8 kPa,6～8 min可使钢水[C]≤0.05%。

Abstract: Based on the production data the analysis on thermodynamics, kinetics of RH carbon-oxygen reaction and natural decarburization in 120 t RH refining process of low carbon steel QD08 (/% ： W0. 07C, 0. 15 〜0. 35Si, 0. 25 〜 0. 45 Mn, W0. 035P, W0. 035 S) has been carried out to get the optimized process for RH refining natural decarburization. The results show that with BOF end temperature ≥l650 °C , RH initial temperature of liquid ≥1600 °C , BOF end [C] 0.04% ~0.10% , end [P] ≤ 0.018% , before BOF tapping adding top slag lime 200 kg and during tapping non-adding alloy and deoxidation agent, and RH vacuum 4 ~8 kPa for 6 ~ 8 min, the liquid [C] shall decrease to ≤ 0,05%.

李海, 刘列喜, 张洪彪, 介瑞华, 王立青, 陆曼, 徐雷. 120 t RH自然脱碳精炼低碳钢QD08的生产实践[J]. 特殊钢, 2018, 39(3): 13-16.

Li Hai, Liu Liexi, Zhang Hongbiao, Jie Ruihua, Wang Liqing, Lu Man , Xu Lei. Production Practice for Low Carbon Steel QD08 Steelmaking by Natural Decarburization during 120 t RH Refining Process[J]. Special Steel, 2018, 39(3): 13-16.

参考文献

[1]徐国群.RH精炼技术的应用于发展[J].炼钢,2006,22(1):12- 14.
[2]Yamaguchi K, Kishimoto Y and Sakuraya T, et al. Effect of Refining Conditions for Ultra Low Carbon Steel on Decarburization Reaction in RH Degasser [J]. ISIJ International, 1992, 32(1) ： 126-127.
[3] Kobayashi H and Donahue F. Start up of KTB(Oxygen Top Blowing in RH) at National Steel Great Lakes Division [C] 〃 Steelmaking Conference Proceedings. Nashville： 1995.
[4]Ahn S B,Choi H S and Kim J S,et al. Oxygen Blowing Technology for Production of Ultra-Low Carbon Steel on RH Degasser [C] 〃 Steelmaking Conference Proceedings. Toronto： 1998.
[5]李扬洲，张大德,薛念福，等.RH-MFB真空处理工艺技术[J].钢铁钒钛，2001, 22(3):4245.
[6]林利平，田义胜.RH-KTB技术在武钢二炼钢厂的应用实践[J].武钢技术,2003 ,41(3):14-16.
[7]Kunitake 0,Imai T and Mukawa S,et al. High Speed Decarburization by Modernized RH-OB and New Decarburizing Technology Under Reduced Pressure by CAS-OB [C]〃Steelmaking Conference Proceedings. Baltimore: 2001.
[8]Kang S C,Kim K C and Park J M,et al. Improvement of Decarburization Capacity of RH Degasser by Revamping at Kwangyang Works, POSCO [C] 〃 Steelmaking Conference Proceedings. Pittsburgh: 2000.
[9]冯聚和，艾立群,刘建华.铁水预处理与钢水炉外精炼铁[M].北京:冶金工业出版社,2006. [10] Cao Jian-guo,Zhang Jie and Chen Xian-lin,et al. Control of Roll Contour for Strip Profile and Flatness in Hot Rolling[A]. 44th Mechanical Working and Steel Processing Conference Proceeding [C]. Orlando:David L. Kanagy,2002.1001-1010.
[11] 秦义.QD08轴心晶间裂产生原因及其改进[J].浙江冶金， 2012,5(2) ：4042,
[12] Yang Z G, Li S X and Zhang J M,et al. The Fatigue Behaviors of Zero Inclusion and Commercial 42CrMo Steels in the Super-long Fatigue Life Regime [J]. Acta Materialia, 2004,52 ( 18 ) ： 5235-5239.
[13] Chapetti M D, Tagawa T and Miyata T. Ultra Long Cycle Fatigue of High-Strength Carbon Steels: Part I . Review and Analysis of the Mechanism of Failure [J] . Materials Science & Engineering C-Materials for Biological Applications,2003 ,356( 1-2): 227.
[14]Chapetti M D, Tagawa T and Miyata T. Ultra-long Cycle Fatigue of High-Strength Carbon Steels: Part R. Estimation of Fatigue Limit for Failure From Internal Inclusions [J] . Materials Science & Engineering C-Materials for Biological Applications, 2003,356 ( 1-2)： 236.
[15]姜敏，王昆鹏,侯泽旺，等.低氧特殊钢中大尺寸DS类夹杂物生成机理[J].工程科学学报,2016,38(6):780-786.