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 ›› 2022, Vol. 43 ›› Issue (4): 21-23.

所属专题: 齿轮钢 电炉炼钢

• 工艺技术 • 上一篇    下一篇

70 t EAF-LF-RH冶炼18CrNiMo7-6齿轮钢过程的夹杂物变化

胡梦頔1,2   

  1. 大冶特殊钢有限公司1棒材研究所;2高品质特殊钢湖北省重点实验室,黄石435001
  • 收稿日期:2022-02-10 出版日期:2022-08-01 发布日期:2022-08-12
  • 作者简介:胡梦頔(1988-),男,工程师,2009年武汉科技大学(本科)毕业,齿轮钢新产品工艺研究。

Evolution of Inclusions in Gear Steel 18CrNiMo7-6 during 70 t EAF-LF-RH Smelting Process

HU Mengdi1,2   

  1. 1 Bar research Institute, 2 Hubei Province Key Laboratory of High Quality Special Steel,
    Daye Special Steel Co Ltd, Huangshi 435001)
  • Received:2022-02-10 Published:2022-08-01 Online:2022-08-12

摘要: 采用全流程取样,利用ASPEX全自动扫描分析法进行检验,对70 t EAF+LF+RH工艺生产的齿轮钢18CrNiMo7-6钢中夹杂物特性的演变规律进行系统的分析和研究,试验结果表明,LF精炼调整成分后,夹杂物数量去除率粒径1~10μm为89%,> 10μm为97%,从LF精炼调整成分后至软吹结束,夹杂物数量去除率粒径1~10μm为54%,> 10μm为66%,>20μm的夹杂物基本清除。夹杂物完成了Al2O3→Al2O3·MgO→Al2O3·CaO的转变。

关键词: 70 t EAF + LF + RH, 18CrNiMo7-6齿轮钢, , 夹杂物, ASPEX分析

Abstract: The evolution of inclusions in gear steel 18CrNiMo7-6 produced by 70 t EAF + LF + RH process is systematically analyzed and studied by means of whole process sampling and ASPEX test. The test results show that sampling after adjusting the composition during LF refining the removal rate of inclusions with size 1 ~ 10 μm is 89% , with > 10 μm is 97% , from adjusting the composition during LF refining to the end of soft blowing, and the removal rate of size 1 ~ 10 μm inclusions reaches 54% removal rate of inclusions > 10 μm is 66% , and the inclusions > 20|im are basically removed. The inclusion completes the transformation from Al2O3 → Al2O3 · MgO →Al2O3 · CaO.