Effect of LF Feeding Si-Ca Wire on Modification of Inclusion in Pipeline Steel X70

王敏; 包燕平; 刘建华; 李太全

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Effect of LF Feeding Si-Ca Wire on Modification of Inclusion in Pipeline Steel X70

更新时间：2026-01-21

- Effect of LF Feeding Si-Ca Wire on Modification of Inclusion in Pipeline Steel X70
- Special Steel Vol. 30, Issue 5, Pages: 50-52(2009)
- 作者机构：
  
  北京科技大学冶金与生态工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：08 April 2009，
  
  Online First：18 November 2022，
  
  Published：18 November 2009
- 稿件说明：
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王敏, 包燕平, 刘建华, et al. Effect of LF Feeding Si-Ca Wire on Modification of Inclusion in Pipeline Steel X70[J]. Special Steel, 2009, 30(5): 50-52.
DOI：

王敏, 包燕平, 刘建华, et al. Effect of LF Feeding Si-Ca Wire on Modification of Inclusion in Pipeline Steel X70[J]. Special Steel, 2009, 30(5): 50-52. DOI：

摘要

100 t BOF-LF-RH-CC流程冶炼X70管线钢[%:0.04C、1.53Mn、0.106(Nb+V+Ti)

]

并在LF精炼时采用喂Φ13 mm 60Si-28Ca线处理。经计算和生产试验得出

喂线速度由100 m/min提高至200 m/min时

平均钙收得率由4.05%提高至14.93%

以200 m/min喂入Si-Ca线420～500 m时满足硫化物变性要求

铸坯中69%夹杂为2～10μm球形或类球形夹杂

且处在CaO-Al

-MgO系相图低熔点区

变性效果好。

Abstract

Pipeline steel X70 [%:0.04C

1.53Mn

0.106(Nb+V+Ti)

]

is melted by 100t BOF-LF-RH-CC flow sheet and feeding Φ13 mm 60Si-28Ca wire treatment is used during LF refining.It is obtained by calculation and commercial production test that with increasing wire feeding speed to 200 m/min from 100 m/min

the average calcium yield increases to 14.93% from 4.05%

and with feeding 420~500 m Si-Ca wire by 200 m/min

the requirement of modification on sulfide is satisfied

69% inclusions in cast billet are 2～10 μm globular and similar to globoid which locate at low-melting-point zone in CaO-Al

-MgO phase diagram with nice modifcation effect.

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