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增刊1 崔衡等:RH真空精炼后F钢镇静工艺的洁净度研究 ·35· (a) b 50μm Electron imaget 504m Electron image 1 Spectrum 8um gloctron lmage1 3 pm Elactron image1 图4镇静处理后中间包钢液的典型夹杂物形貌 Fig.4 Typical morphologies of inclusions in IF steel in the tundish after RH holding process 表1典型夹杂物化学成分(质量分数) 参考文献 Table 1 Chemical composition of inclusions [1]International Iron and Steel Institute.IISI Study on Clean Steel: 夹杂物C N 0A1 Si S Ti Fe State of the Art and Process Technology in Clean Steelmaking.The 图4(a)2.21 41.4938.43 Chinese Society For Metals,translated.Beijing:Metallurgical In- 一 一17.87 dustry Press,2006:54 图4(b)2.27 47.8348.60- 一1.30 (国际钢铁协会,洁净钢:洁净钢生产工艺技术.中国金属学 图4(d)2.80- 49.9844.431.33-0.471.00 会,译.北京:治金工业出版社,2006:54) 22]Wuennenberg K.Oxide cleanness:a strong challenge for high 图4(d)2.656.5217.3810.25一1.1831.6330.38 quality steel products /Proceedings of 2008 International Sympo- sium on clean Steel.Anshan,2008:10 间在30min到40min的区间内,中间包内钢液试样 B]Tang F P,Li D C.Liao X W,et al.Reviews and prospects of T[0]含量基本稳定,所分析炉次中只有4.76%炉 clean steel production practices in Ansteel.J Iron Steel Res Int 次TO]超过30×10-4%,在考虑RH镇静工艺时 2011,18(Suppl2):9 要注意控制合适的RH顶渣氧化性,在该厂现行工 4]Cui H,Chen B,Wang M,et al.Cleanliness control of IF steel during the RH refining process.J Univ Sci Technol Beijing,2011, 艺条件下,镇静时间不宜超过40min. 33(Suppl1):147 (2)随着镇静时间的增加,单位面积夹杂物数 (崔衡,陈斌,王敏,等.RH精炼过程中F钢洁净度的控制 量总体呈现先下降后增加的趋势,即由l4min的 北京科技大学学报,2011,33(Suppl1):147) 26.63mm-2降至34min时的18.13mm-2,又上升至 [5]Huang ZZ,Zheng YY,Jiang X F,et al.Overview:development 54min的25.72mm-2,与全氧含量变化规律基本 of clean steel production at Baosteel.J Iron Steel Res Int,2011, 18(Suppl2):36 吻合 [6]Nakamura H.Kohira S,Kubota T,et al.Technology for produc- (3)在该厂现行工艺条件下,镇静时间在 tion of high quality slab at high speed casting /1992 Steelmaking 30min到40min时段内的钢液洁净度水平较高. Conference Proceedings.Warrendale,1992:409增刊 1 崔 衡等: RH 真空精炼后 IF 钢镇静工艺的洁净度研究 图 4 镇静处理后中间包钢液的典型夹杂物形貌 Fig. 4 Typical morphologies of inclusions in IF steel in the tundish after RH holding process 表 1 典型夹杂物化学成分( 质量分数) Table 1 Chemical composition of inclusions % 夹杂物 C N O Al Si S Ti Fe 图 4( a) 2. 21 ! 41. 49 38. 43 ! ! ! 17. 87 图 4( b) 2. 27 ! 47. 83 48. 60 ! ! ! 1. 30 图 4( c) 2. 80 ! 49. 98 44. 43 1. 33 ! 0. 47 1. 00 图 4( d) 2. 65 6. 52 17. 38 10. 25 ! 1. 18 31. 63 30. 38 间在 30 min 到 40 min 的区间内,中间包内钢液试样 T[O]含量基本稳定,所分析炉次中只有 4. 76% 炉 次 T[O]超过 30 × 10 - 4 % ,在考虑 RH 镇静工艺时 要注意控制合适的 RH 顶渣氧化性,在该厂现行工 艺条件下,镇静时间不宜超过 40 min. ( 2) 随着镇静时间的增加,单位面积夹杂物数 量总体呈现先下降后增加的趋势,即由 14 min 的 26. 63 mm - 2 降至 34 min 时的 18. 13 mm - 2 ,又上升至 54 min 的 25. 72 mm - 2 ,与全氧含量变化规律基本 吻合. ( 3) 在该厂现行工艺条件下,镇 静 时 间 在 30 min到 40 min 时段内的钢液洁净度水平较高. 参 考 文 献 [1] International Iron and Steel Institute. IISI Study on Clean Steel: State of the Art and Process Technology in Clean Steelmaking. The Chinese Society For Metals,translated. Beijing: Metallurgical In￾dustry Press,2006: 54 ( 国际钢铁协会. 洁净钢: 洁净钢生产工艺技术. 中国金属学 会,译. 北京: 冶金工业出版社,2006: 54) [2] Wuennenberg K. Oxide cleanness: a strong challenge for high quality steel products / / Proceedings of 2008 International Sympo￾sium on clean Steel. Anshan,2008: 10 [3] Tang F P,Li D G,Liao X W,et al. Reviews and prospects of clean steel production practices in Ansteel. J Iron Steel Res Int, 2011,18( Suppl 2) : 9 [4] Cui H,Chen B,Wang M,et al. Cleanliness control of IF steel during the RH refining process. J Univ Sci Technol Beijing,2011, 33( Suppl 1) : 147 ( 崔衡,陈斌,王敏,等. RH 精炼过程中 IF 钢洁净度的控制. 北京科技大学学报,2011,33( Suppl 1) : 147) [5] Huang Z Z,Zheng Y Y,Jiang X F,et al. Overview: development of clean steel production at Baosteel. J Iron Steel Res Int,2011, 18( Suppl 2) : 36 [6] Nakamura H,Kohira S,Kubota T,et al. Technology for produc￾tion of high quality slab at high speed casting / / 1992 Steelmaking Conference Proceedings. Warrendale,1992: 409 ·35·
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