Technology Measures for Production of Free-Cutting Steel SUM24HSL by Continuous Casting Billet

孙华; 高宇; 孙彦辉; 李士琦

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Technology Measures for Production of Free-Cutting Steel SUM24HSL by Continuous Casting Billet

更新时间：2026-01-21

- Technology Measures for Production of Free-Cutting Steel SUM24HSL by Continuous Casting Billet
- Special Steel Vol. 31, Issue 5, Pages: 45-48(2010)
- 作者机构：
  
  1. 北京科技大学冶金与生态土程学院,北京,100083
  2. 南京钢铁联合有限公司,南京,210035
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：07 May 2010，
  
  Online First：11 November 2022，
  
  Published：11 November 2010
- 稿件说明：
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孙华, 高宇, 孙彦辉, et al. Technology Measures for Production of Free-Cutting Steel SUM24HSL by Continuous Casting Billet[J]. Special Steel, 2010, 31(5): 45-48.
DOI：

孙华, 高宇, 孙彦辉, et al. Technology Measures for Production of Free-Cutting Steel SUM24HSL by Continuous Casting Billet[J]. Special Steel, 2010, 31(5): 45-48. DOI：

摘要

铅易切削钢生产的关键技术是控制铅的收得率

铅在钢液中的均匀性

铅蒸汽对环境的污染、铸坯表面质量及顺行浇铸。从铅的控制和提高可浇铸性两方面研究了SUM24HSL钢(%:≤0.11C、1.0～1.5Mn、≤0.05Si、0.04～0.09P、0.26～0.42S、0.25～0.32Pb)的100 t EAF-LF-CC工艺。结果表明

在1 620～1 640℃加铅3.5～4.0 kg/t

铅粒度2～3 mm

加入速度50～60 kg/min

氩气流量420～480 L/min

铅的收得率为75%。匹配结晶器振动参数

合适的结晶器保护渣、浇铸温度和保护浇铸技术可保证连铸顺行和轧材冶金质量。

Abstract

The key technology for production of lead free-cutting steel is to control the yield of lead

the homogeneity of lead in liquid

the lead vapour pollution on environment

the surface quality of billet and smooth casting. Both controlling lead and increasing castability of steel SUM24HSL (% : ≤0.11C

1.0-1.5Mn

≤0.05Si

0.04-0.09P

0.26-0.42S

0.25-0.32Pb) produced by 100 t EAF-LF-CC process has been studied. Results show that with adding lead 3.5-4.0 kg/1 (size 2-3 mm) at 1620-1640 °C

adding speed 50-60 kg/min

argon blowing rate 420-480 L/min

the yield of lead is 75%. Smooth casting and qualified metallurgical quality are insured by combined mold vibration parameters

suitable mold flux

casting temperature and shield casting technology.

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