Production Practice of Preventing Nozzle Clogging for Casting Ti-Bearing Welding Wire Steel GF50-G

杨咏阶; 刘玉爱; 张向勇

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Production Practice of Preventing Nozzle Clogging for Casting Ti-Bearing Welding Wire Steel GF50-G

更新时间：2026-01-21

- Production Practice of Preventing Nozzle Clogging for Casting Ti-Bearing Welding Wire Steel GF50-G
- Special Steel Vol. 39, Issue 3, Pages: 9-12(2018)
- 作者机构：
  
  1. 山东广富集团有限公司技术中心,滨州,256217
  2. 山东省大规格合金结构钢棒材工程技术研究中心,滨州,256217
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：23 November 2017，
  
  Online First：02 June 2022，
  
  Published：02 June 2018
- 稿件说明：
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杨咏阶, 刘玉爱, 张向勇. Production Practice of Preventing Nozzle Clogging for Casting Ti-Bearing Welding Wire Steel GF50-G[J]. Special Steel, 2018, 39(3): 9-12.
DOI：

杨咏阶, 刘玉爱, 张向勇. Production Practice of Preventing Nozzle Clogging for Casting Ti-Bearing Welding Wire Steel GF50-G[J]. Special Steel, 2018, 39(3): 9-12. DOI：

摘要

含钛焊丝钢GF50-G（/%:0.08C

0.83Si

1.55Mn

0.014P

0.012S

0.19Ti）生产流程为80 t顶底复吹转炉-LF-160 mm×160mm方坯连铸

在浇注过程中经常出现水口结瘤现象。扫描电镜和能谱仪对水口结瘤物的分析得出

结瘤物主要物相为TiO

。水口结瘤的热力学计算表明

为避免钛脱氧产物被[Al

]

还原形成铝钛系夹杂物

应控制[Als

]

在0.008%以下。根据生产实践

将中间包钢水温度从1542℃提高至1 550℃控制[Alt

]

≤0.010%、加钛铁前使[O

]

≤15×10

-6

、减少钢水的二次氧化能够防止水口结瘤、连浇炉次从3～4炉提高到8～10炉。

Abstract

The production flowsheet of Ti-bearing welding wire steel GF50-G (/% : 0. 08C

0. 83Si

1.55Mn

0. 014P

0. 012S

0. 19Ti) is 80 t top and bottom combined blowing converter-LF-160 mm x 160 mm billet casting

and the phenomenon of nozzle clogging often occurs in casting process. It is obtained by analysis of SEM and EDS on nozzle clogging deposit that the main phase in deposit is TiO

. The thermodynamic calculation of nozzle clogging deposit shows that the Al content in liquid steel-[ Als

]

should be controlled less than 0. 008% in order to avoid Ti-deoxidized products being reduced by [ Al

]

and forming aluminium-titanium inclusions. Based on production practice with increasing temperature of liquid steel in tundish from 1 542 °C to 1 550 °C

controlling [ Alt

]

≤ 0. 010%

]

≤ 15 x 10

-6

before adding ferrotitanium and decr

easing reoxidation of liquid steel the nozzle clogging could be prevented

and the continuous casting heats may increase from 3 ~4 heats to 8 ~ 10 heats.

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