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 ›› 2008, Vol. 29 ›› Issue (5): 1-3.

• 试验研究 •    下一篇

精炼渣对轴承钢中氧含量和夹杂物的影响

阮小江1,2， 姜周华3， 龚 伟3 ，李  阳3，李 京 社1   

  1. 1. 北京科技大学冶金与生态工程学院，北京 100083;
    2. 江阴兴澄特种钢铁有限公司，江阴 214400;
    3. 东北大学材料与冶金学院，沈阳 110004;
  • 收稿日期:2008-03-13 出版日期:2008-10-01 发布日期:2022-12-23
  • 作者简介:阮小江(1968-)，男，博士研究生，厂长、高级工程师，特殊钢品种、质量和工艺研究。

Influence of Refining Slag on Oxygen Content and Inclusions in Bearing Steel

Ruan Xiaojiang1,2 , Jiang Zhouhua3 , Gong Wei3 , Li Yang3 , Li Jingshe1   

  1. 1. School of Metallurgical and Ecological Engineering,University of Science and Technology,Beijing 100083;
    2. Jiangyin Xingcheng Special Steel Co Ltd., Jiangyin 214400;
    3. School of Materials and Metallurgy,Northeastern University,Shenyang 110004;
  • Received:2008-03-13 Published:2008-10-01 Online:2022-12-23

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摘要： 采用MoSi2电阻炉在MgO质坩埚内进行了精炼渣成分(%:47～64CaO、13～23SiO2、15～25Al2O3、5～10MgO、0～8CaF2；CaO/SiO2=2.0～4.5)对0.95%C-1.50%Cr GCr15轴承钢中氧含量和夹杂物的影响的实验研究。实验中发现,随精炼渣碱度CaO/SiO2由2增加至4.5,钢液中的终点全氧含量由20×10-6降至11×10-6,夹杂物的总数量、总面积和平均半径减小。适当提高Al2O3含量或添加CaF2,减少MgO含量,可以显著提高炉渣吸附夹杂物的速度和能力。低碱度渣精炼的钢液中夹杂物成分含有≥20%SiO2,塑性较好,夹杂物的尺寸为15～20μm。高碱度渣精炼的钢液中典型的夹杂物是氧化铝和铝镁尖晶石等脆性夹杂物,尺寸≤5μm。

关键词: 轴承钢, 精炼渣, 碱度, 氧含量, 夹杂物

Abstract: The infuence of ingredient of refining slag(47～64CaO,13～23SiO2,15～25Al2O3,5～10MgO,0~ 8CaF2;CaO/SiO2=2.0~4.5) on oxygen content and inclusions in 0.95C-1.50Cr CCr15 bearing steel has been tested and studied by MoSi2 electrical resistance furnace with MgO crucible. It was found in test that with increased refining slag basicity CaO/SiO2 from 2 to 4.5,the end total oxygen content in liquid steel decreased from 20×10-6 to 11×10-6,and the total amount,total area and average size of inclusions in steel decreased; the speed and capability of refining slag to absorb inclusions could remarkably increase with increasing Al2O3 content or adding CaF2,decreasing MgO content in slag; with low basicity refining slag,the size of inclusions in liquid steel,which contained ≥20% SiO2,was 15～20 μm with quite good plasticity; and with high basicity slag the typical inclusions in liquid steel were brittle inclusions such as alumina and MgO-Al2O3 spinel,of which the size was ≤5 μm.

Key words: Bearing Steel, Refining Slag, Basicity, Oxygen Content, Inclusion

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