AOD Smelting of Austenitic Stainless 1Mn18Cr18N Protective Ring Steel

doi:10.20057/j.1003-8620.2023-00048

Abstract

Abstract: Through the thermodynamic calculation and analysis of nitrogen solubility in 1Mn18Cr18N protective ring steel， it is found that increasing the content of Cr and Mn elements in the steel can significantly improve the solubility of nitrogen. At the same time， the solubility of nitrogen increases as the molten steel temperature decreases . This paper describes the production process of 1Mn18Cr18N protective ring steel by non-vacuum induction furnace， electric furnace，AOD and LF refining， and alloying treatment with bottom blowing nitrogen， which is shorten the production time， and the composition control is quite stable. When AOD refining bottom blowing nitrogen is used for alloying， the nitrogen content in the molten steel can reach 0. 547% and the nitrogen solubility tends to be saturated. In the LF refining process， when using bottom blowing nitrogen and nitrogen-containing alloys， the nitrogen content in the steel can reach 0.68%.

Key words: AOD, 1Mn18Cr18N Steel, Thermodynamic, Nitrogen Alloying, Austenitic Stainless Steel

摘要： 通过对1Mn18Cr18N护环钢中氮的溶解度进行热力学计算分析，发现增加钢水中Cr、Mn的含量，能够显著提高氮的溶解度。同时，随着钢水温度的降低，氮的溶解度也会提高。阐述了采用非真空感应炉和电炉、AOD与LF精炼等冶炼工艺生产1Mn18Cr18N护环钢的过程，并利用底吹氮气进行合金化处理，缩短了生产时间，同时成分控制也相当稳定。在使用AOD精炼底吹氮气进行合金化时，钢水中氮含量可达到0.547%，氮的溶解度趋于饱和。LF精炼过程在使用氮气底吹和含氮合金的情况下，钢中氮含量可达0.68%。

关键词: AOD, 1Mn18Cr18N钢, 热力学, 氮气合金化, 奥氏体不锈钢

CLC Number:

TF769. 1

Zhang Donghai, Xu Rongchuan, Guo Chang, Xu Yong, Zhang Xiaolei, Pan Mingxu. AOD Smelting of Austenitic Stainless 1Mn18Cr18N Protective Ring Steel[J]. Special Steel, 2024, 45(2): 46-49.

章东海, 徐荣川, 郭畅, 许勇, 张晓磊, 潘明旭. AOD法冶炼护环用奥氏体不锈钢1Mn18Cr18N[J]. 特殊钢, 2024, 45(2): 46-49.

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