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

胡梦頔

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

更新时间：2026-01-21

- Evolution of Inclusions in Gear Steel 18CrNiMo7-6 during 70 t EAF-LF-RH Smelting Process
- Special Steel Vol. 43, Issue 4, Pages: 21-23(2022)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 February 2022，
  
  Online First：12 August 2022，
  
  Published：12 August 2022
- 稿件说明：
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胡梦頔. Evolution of Inclusions in Gear Steel 18CrNiMo7-6 during 70 t EAF-LF-RH Smelting Process[J]. Special Steel, 2022, 43(4): 21-23.
DOI：

胡梦頔. Evolution of Inclusions in Gear Steel 18CrNiMo7-6 during 70 t EAF-LF-RH Smelting Process[J]. Special Steel, 2022, 43(4): 21-23. DOI：

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Al

→Al

·MgO→Al

·CaO的转变。

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 Al

3 →

3 ·

MgO →Al

· CaO.

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