Effect of Residual Boron on Jominy Hardenability of 20CrMnTiH Steel and Process Control

王芝林; 何国宁; 高建鹏; 贾羽; 赵海东

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Effect of Residual Boron on Jominy Hardenability of 20CrMnTiH Steel and Process Control

更新时间：2026-01-21

- Effect of Residual Boron on Jominy Hardenability of 20CrMnTiH Steel and Process Control
- Special Steel Vol. 43, Issue 2, Pages: 40-43(2022)
- 作者机构：
  
  1. 西宁特殊钢股份有限公司技术质最中心,西宁,810005
  2. 北京科技大学新材料技术研究院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：10 June 2022，
  
  Published：10 June 2022
- 稿件说明：
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王芝林, 何国宁, 高建鹏, et al. Effect of Residual Boron on Jominy Hardenability of 20CrMnTiH Steel and Process Control[J]. Special Steel, 2022, 43(2): 40-43.
DOI：

王芝林, 何国宁, 高建鹏, et al. Effect of Residual Boron on Jominy Hardenability of 20CrMnTiH Steel and Process Control[J]. Special Steel, 2022, 43(2): 40-43. DOI：

摘要

通过对特钢厂经110 t电弧炉+LF/VD精炼+连铸+热连轧工艺流程生产的400炉钢棒材的数据进行统计

利用末端淬透性实验[（920±10）℃50 min后空冷至室温

随后（880±5）℃ 30 min水淬

]

和光谱分析获得了20CrMnTiH系列钢的淬透性和化学成分

发现淬透性与残余硼元素存在线性关系。通过对各冶炼工序的分析

得出钢中B的主要来源是电弧炉下渣

控制电弧炉出钢下渣量

可以有效控制钢中B含量。此外

还须将精炼渣中Al

含量从～30%降至15%～20%

可将钢中B含量控制在0.000 2%以下。

Abstract

The experimental data of 400 heats of steel produced by 110 t EAF + LF/VD refining + continuous casting + hoi rolling in a special steel plant are statistically analyzed. The hardenability [at (920 ± 10) °C for 50 min and then air cooling to room temperature

followed by holding at (880 ±5) °C for 30 min water quenching

]

and chemical composition of 20CrMnTiH steel are obtained by means of Jominy test and spectral analysis to get a linear relationship between the hardenability and the content of residual boron. By each steelmaking practice analysis it is found that the main source of B in steel is EAF tapping slag. The content of B in steel can be effectively controlled by controlling the amount of tapping slag in EAF tapping. In addition

when the amount of Al

in the refining slag decreases from 30 % to 15% ~20%

the content of B in steel can be controlled below 0.

000 2%.

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