Mg-Zr处理对FH40级船板钢铸态夹杂物特征的影响

doi:10.12068/j.issn.1005-3026.2014.04.017

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (4): 529-533.DOI: 10.12068/j.issn.1005-3026.2014.04.017

Mg-Zr处理对FH40级船板钢铸态夹杂物特征的影响

李小兵，王德永，刘承军，姜茂发

(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:2013-07-09 修回日期:2013-07-09 出版日期:2014-04-15 发布日期:2013-11-22
通讯作者: 李小兵
作者简介:李小兵(1988-)，男，四川德阳人，东北大学博士研究生；刘承军(1974-)，男，河南新乡人，东北大学教授，博士生导师；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(50904017)；中央高校基本科研业务费专项资金资助项目(N120602005)；中国博士后科学基金资助项目(2011M500823).

Effects of MgZr Combined Treatment on Characteristics of Inclusions in FH40 ShipBuilding Steel Ingots

LI Xiaobing， WANG Deyong， LIU Chengjun， JIANG Maofa

Key Laboratory for Ecological Metallurgy of Multimetallic Mineral

Received:2013-07-09 Revised:2013-07-09 Online:2014-04-15 Published:2013-11-22
Contact: LI Xiaobing
About author:-
Supported by:
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摘要/Abstract

摘要： 采用定量金相及SEM-EDS手段对Mg，Zr及Mg-Zr处理FH40级船板铸钢中夹杂物粒径分布、平均粒径、总数量、总面积及成分、形貌等特征进行系统研究.结果表明，Mg，Zr及Mg-Zr处理后铸锭夹杂物平均粒径下降，夹杂物总数量增加.Mg的质量分数为0024%时，夹杂物中MgO平均质量分数为1257%，变质不充分；Mg的质量分数增加至0072%后，夹杂物中MgO平均质量分数为3558%，实现了氧化铝向MgO·Al2O3的充分变质，且夹杂物粒径明显减小.003%Zr处理后，铸锭夹杂物以Al2O3+MnS，Al-Zr-O+MnS为主；低Mg+高Zr，高Mg+低Zr，高Mg+高Zr处理炉次试验钢铸锭中均发现了含Zr夹杂物，其中高Mg+高Zr炉次形成了ZrO2夹杂，该类夹杂物被MgO·Al2O3包裹，团聚现象明显.

关键词: 船板钢, 夹杂物, Mg, Zr, 变质

Abstract: The characteristics such as particle size distribution， average particle size， total amount and chemical composition of FH40 shipbuilding steels formed by Mg， Zr， MgZr combined treatment were investigated by the quantitative metallographic and SEMEDS methods. The results showed that the average particle size decreased while the total amount of inclusions increased after Mg， Zr， MgZr treatment. With 0024%Mg addition， the average mass fraction of MgO was 1257% in the inclusions， which was not fully modified； With 0072%Mg addition， the average mass fraction of MgO was 3558%， in the inclusions which meant that Al2O3 completely translated into MgO·Al2O3， and the size of inclusions decreased obviously. With 003% Zr addition， the main inclusions of the ingot were mainly Al2O3+MnS， AlZrO+MnS. The Zrcontaining inclusions were all found after MgZr combined treatment with the amount of the Mg and Zr additions changed as follow low Mg+high Zr， high Mg+low Zr and high Mg+high Zr. Especially， ZrO2 inclusions wrapped with MgO·Al2O3were found in the high Mg+high Zr treated steel with the apparent tendency to be aggregated.

Key words: shipbuilding steel, inclusions, magnesium, zirconium, modification

中图分类号:

TF77

李小兵，王德永，刘承军，姜茂发. Mg-Zr处理对FH40级船板钢铸态夹杂物特征的影响[J]. 东北大学学报:自然科学版, 2014, 35(4): 529-533.

LI Xiaobing， WANG Deyong， LIU Chengjun， JIANG Maofa. Effects of MgZr Combined Treatment on Characteristics of Inclusions in FH40 ShipBuilding Steel Ingots[J]. Journal of Northeastern University Natural Science, 2014, 35(4): 529-533.

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Mg-Zr处理对FH40级船板钢铸态夹杂物特征的影响

Effects of MgZr Combined Treatment on Characteristics of Inclusions in FH40 ShipBuilding Steel Ingots

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