ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2020, Vol. 41 ›› Issue (3): 25-27.

所属专题: 钢板

• 工艺技术 • 上一篇    下一篇

25MnBM履带板用钢非金属夹杂物控制工艺研究

卢乃双, 梁娜, 黄涛   

  1. 山东钢铁股份有限公司莱芜分公司,莱芜271104
  • 收稿日期:2019-11-28 出版日期:2020-06-01 发布日期:2022-04-24
  • 作者简介:卢乃双(1982-),男,工程师,2007年辽宁科技大学(本科) 毕业,优特钢研究。

Study on Control Technology of Non-metallic Inclusions in 25MnBM Steel for Track Plate

Lu Naishuang, Liang Na , Huang Tao   

  1. Lai Wu Company, Shandong Iron and Steel Co Ltd, Laiwu 271104
  • Received:2019-11-28 Published:2020-06-01 Online:2022-04-24

摘要: 采用50 t电弧炉短流程生产25MnBM履带板用钢。研究了钢中TiN夹杂物的控制工艺及稀土对25MnBM钢中非金属夹杂物的影响。通过降低钢中氮含量至70×10-6以下及优化连铸工艺,TiN夹杂物的数量及尺寸得到了大幅度的改善。通过添加稀土,研究稀土对25MnBM履带板用钢非金属夹杂物的影响,试验结果表明:按0.20~0.25 kg/t加入稀土后,可使非金属夹杂物总面积减小,最大夹杂物尺寸和夹杂物平均尺寸减小,对钢起到了较好的净化作用。

关键词: 25MnBM, 非金属夹杂物, 稀土 TiN

Abstract: The 25MnBM track plate steel is produced by 50 ton EAF short process. The control technology of TiN inclusions and the effect of RE on non-metallic inclusions in 25MnBM of steel are studied. The amount and size of TiN inclusions are greatly improved by reducing the nitrogen content of steel below 70 X 10-6;and optimizing the continuous casting process. The effect of RE on non-metallic inclusions in 25MnBM track plate steel is studied. Test results show that, after adding 0.20 - 0.25 kg/t RE into steel, the total area of non-metallic inclusions can be reduced, the maximum inclusion size and the average inclusion size decrease, which plays a better role to purify steel.

Key words:  , 25MnBM, Non-metallic Inclusions, RE, TiN