Analysis and Improvement Measures for Nodulation of Nozzle about Production of 42CrMoA Alloy Steel Melted by 120 t BOF

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Analysis and Improvement Measures for Nodulation of Nozzle about Production of 42CrMoA Alloy Steel Melted by 120 t BOF

更新时间：2026-01-21

- Analysis and Improvement Measures for Nodulation of Nozzle about Production of 42CrMoA Alloy Steel Melted by 120 t BOF
- Special Steel Vol. 39, Issue 5, Pages: 36-39(2018)
- 作者机构：
  
  山东钢铁股份有限公司莱芜分公司特钢事业部,莱芜,271104
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：23 April 2018，
  
  Online First：30 May 2022，
  
  Published：30 May 2018
- 稿件说明：
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丰年. Analysis and Improvement Measures for Nodulation of Nozzle about Production of 42CrMoA Alloy Steel Melted by 120 t BOF[J]. Special Steel, 2018, 39(5): 36-39.
DOI：

丰年. Analysis and Improvement Measures for Nodulation of Nozzle about Production of 42CrMoA Alloy Steel Melted by 120 t BOF[J]. Special Steel, 2018, 39(5): 36-39. DOI：

摘要

分析了120 t转炉生产42CrMoA合结钢（/%:0.28～0.45C

0.17-0.37Si

0.50～0.80Mn

≤0.020P

≤0.020S

0.90～1.20Cr

0.15～0.25Mo

Cu≤0.20

Ni≤0.30

0.015～0.035Al）塞棒和浸入式水口结瘤原因。分析表明塞棒结瘤物的主要为Al

和高熔点的CaO·2Al

类钙铝酸盐

浸入式水口结瘤物主要为Al

夹杂物聚集。通过控制转炉终点碳在0.18%～0.28%、转炉出钢钢水溶解氧含量

200×10

-6

、调整精炼终点钙铝参数（0.020%～0.030%Al;0.001 5%～0.003 0%Ca）、连铸保护浇铸工艺实施等措施

解决了转炉生产42CrMoA合结钢塞棒和水口结瘤问题。

Abstract

The reasons for the slug nodulation of 42CrMoA alloy steel (/% ：0.28 〜0.45C

0. 17 〜0.37Si

0.50 ~ 0. 80Mn

≤ 0.020P

≤ 0.020S

0.90-1.20Cr

0.15 ~0.25Mo

Cu≤0.20

Ni≤ 0.30

0.015 ~0.035A1) melted by 120 t BOF and the submerged nozzle were analyzed. The results showed that the main nodule nodules were Al

and CaO·2Al

aluminates with high melting point. By controlling the end point carbon of converter in 0. 18% to 0. 28%

the dissolved oxygen content of the molten steel in converter is less than 200 x 10

-6

the parameters of calcium aluminum (0.020% ~0.030% Al； 0.001 5% ~0.003 0% Ca) at the end point of refining

and the casting technology of continuous casting are i

mplemented

the nodulation of 42CrMoA junction steel stopper and the nozzle of the converter is solved.

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