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硫质量分数对Ti-Zr脱氧E36钢中夹杂物的影响

DOI: 10.3969/j.issn.1005-3026.2015.09.013, PP. 1273-1277

Keywords: 炼钢,船板钢,硫质量分数,夹杂物,脱氧

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Abstract:

为明确钢中硫质量分数对Ti-Zr脱氧的E36船板钢中夹杂物的影响,在1873K下,在MoSi2电阻炉上用70mm×100mmMgO坩埚开展了3炉E36钢炼钢实验.结果表明,Ti-Zr脱氧钢中夹杂物主要以含TiO○x和ZrO2成分的外围包裹MnS的球形夹杂物为主,典型夹杂物为Al2O3-TiO○x-MnS,MgO-SiO2-Al2O3,Al2O3-SiO2-TiO○x-ZrO2,TiO○x-SiO2-Al2O3-MnS等.随着硫质量分数的增加,小于10μm的夹杂物所占比例逐渐提高到99.5%,夹杂物平均直径由1.7μm增大到2.3μm,夹杂物中平均硫质量分数和单个夹杂物中MnS所占的面积百分比均增加,w[S]=0.0015%时面积比为0.15%,w[S]=0.011%时面积比达到0.72%.

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