Effect of 300t RH Circulation Time after Adding Aluminium on Behavior of Deoxidation Inclusions in IF Steel

张正群

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Effect of 300t RH Circulation Time after Adding Aluminium on Behavior of Deoxidation Inclusions in IF Steel

更新时间：2026-01-21

- Effect of 300t RH Circulation Time after Adding Aluminium on Behavior of Deoxidation Inclusions in IF Steel
- Special Steel Vol. 39, Issue 1, Pages: 48-50(2018)
- 作者机构：
  
  马钢第四钢轧总厂,马鞍山,243000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 September 2017，
  
  Online First：01 July 2022，
  
  Published：01 July 2018
- 稿件说明：
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张正群. Effect of 300t RH Circulation Time after Adding Aluminium on Behavior of Deoxidation Inclusions in IF Steel[J]. Special Steel, 2018, 39(1): 48-50.
DOI：

张正群. Effect of 300t RH Circulation Time after Adding Aluminium on Behavior of Deoxidation Inclusions in IF Steel[J]. Special Steel, 2018, 39(1): 48-50. DOI：

摘要

RH精炼过程加铝前IF钢（/%:≤0.005C

≤0.04Si

0.05~0.20Mn

≤0.015P

≤0.015S

0.03~0.06Als）中的氧含量为340×10

-6

~467×10

-6

用Aspex扫描电镜研究了加铝后210 min钢中夹杂物类型、尺寸和数量，结果表明，IF钢在RH工序加铝脱氧后钢液中夹杂物的类型主要为氧化铝，随着RH循环时间的增加，钢液中夹杂物数量减少；加铝真空循环6 min后可进行合金化，进一步延长循环时间，钢液中夹杂物的去除速度减缓；加铝前IF钢液中的初始氧含量偏高时，可适当延长循环时间至8 min，再进行合金化。

Abstract

The oxygen content in IF steel (/% ：≤0.005C

≤0.04Si

0.05~0.20Mn

≤0.015P

≤0.015S

0.03~0.06Als) before adding aluminium in RH refining process is 340 x 10

-6

~467 x 10

-6

and the types

size and number of inclusions in steel after adding aluminium for 2~10 min have been studied by ASPEX scanning electron microscope. Results show that the main type of inclusions in IF steel alter deoxidation by adding aluminium in RH refining process is alumina

with increasing circulation time of RH refining the number of inclusions in liquid decreases ； with after adding aluminium for 6 min it is available to alloying operation and further prolonging circulation time the removing rate of inclusions in liquid slows down； as the initial oxygen content in IF liquid before adding aluminium is rather higher

it may be appropriate to extend circulation

time to 8 min then to alloying.

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