东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (9): 1270-1274.DOI: 10.12068/j.issn.1005-3026.2014.09.013

• 材料与冶金 • 上一篇    下一篇

铝、镁脱氧钢中夹杂物的动态演变规律

张同生1,2,王德永1,2,张永启1,2,姜茂发1,2   

  1. (1 东北大学 材料与冶金学院, 辽宁 沈阳110819; 2 东北大学 多金属共生矿生态化冶金教育部重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2013-11-13 修回日期:2013-11-13 出版日期:2014-09-15 发布日期:2014-04-11
  • 通讯作者: 张同生
  • 作者简介:张同生(1984-),男,河北邯郸人,东北大学博士研究生;姜茂发(1955-),男,山东栖霞人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51374059);中央高校基本科研业务费专项资金资助项目(N120602005,N120502004).

Dynamic Evolution of Inclusions in AlMg Deoxidation Melts

ZHANG Tongsheng1,2, WANG Deyong1,2, ZHANG Yongqi1,2, JIANG Maofa1,2   

  1. 1 School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2 Key Laboratory for Ecological Metallurgy of Multimetallic Ores
  • Received:2013-11-13 Revised:2013-11-13 Online:2014-09-15 Published:2014-04-11
  • Contact: ZHANG Tongsheng
  • About author:-
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摘要: 本研究制备了不同氧、硫含量的实验钢,采用SEM-EDX和CSLM探讨了钢中夹杂物类型及高温演变规律.结果表明,脱氧生成的MgO大多为球形,而MgO·Al2O3呈现不规则形状.单独铝脱氧钢中Al2O3夹杂物通过移动、碰撞、聚合的方式形成大型簇团.铝镁复合脱氧钢中夹杂物形貌和动态演变随着[Al],[Mg]和[S]含量的变化呈现出不同的现象.当[Mg],[Al]含量满足MgO生成条件时,夹杂物无明显聚合现象,呈弥散分布的特征;当[Mg],[Al]含量位于MgO·Al2O3生成区域时,未观察到团簇状夹杂物出现,但夹杂物粒径较MgO大;当夹杂物成分同时满足MgO和MgS生成条件时,夹杂物聚合趋势明显,推测是硫化物的形成促进了夹杂物的聚合现象.

关键词: 镁, 脱氧, 夹杂物, 热力学, 动态演变

Abstract: The inclusions characteristics and dynamic evolution of hightemperature experimental melts with different S and O content were studied by using SEMEDS and CSLM. The results showed that most of MgO in the deoxidation melt is spherical, but the MgO·Al2O3 presents irregular shape. Large inclusions of Al2O3 is easy to form in Alkilled molten steel through travelling, collision and aggregation. However, the characteristics of inclusions in AlMg complex deoxidation melts are different, depending on the content of[Al],[Mg]and[S]. When the content of [Mg] and [Al] meets the condition of MgO, the inclusions show no obvious aggregation tendency, even have isolated and dispersed distribution. When the content of [Mg] and [Al] meets the condition of MgO·Al2O3, the inclusions also show no obvious aggregation tendency, but the size of single particle is larger than that of MgO particles. When the content meets the formation condition of MgO and MgS simultaneously, the aggregation tendency of the inclusions is obvious. It is easily speculated that the sulphides promote the aggregation of the inclusions.

Key words: magnesium, deoxidation, inclusion, thermodynamic, dynamic evolution

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