MnS在Ti-Al复合脱氧氧化物上的析出研究

钢铁, 2010, 45(11): 32-36.

MnS在Ti-Al复合脱氧氧化物上的析出研究

杨成威 ^1, , 吕迺冰 ^2, , 卓晓军 ^3, , 王新华 ^4, , 王万军 ^5,

1.北京科技大学冶金与生态工程学院,北京,100083

2.北京科技大学冶金与生态工程学院,北京,100083

3.北京科技大学冶金与生态工程学院,北京,100083;中国五矿集团公司,北京,100044

4.北京科技大学冶金与生态工程学院,北京,100083

5.北京科技大学冶金与生态工程学院,北京,100083

关键词： MnS , 氧化物冶金 , 析出 , Ti-Al复合脱氧

Study of MnS Precipitation on Ti-Al Complex De-Oxidation Inclusions

采用高温电阻炉,通过改变不同冷却条件和不同硫含最,系统研究了Ti-Al复合脱氧夹杂对MnS夹杂物析出量和形貌的影响.试验结果表明:冷却速率对MnS的析出有着重要的影响.当钢液中硫的质量分数从0.001%增加到0.01%时,在炉冷条件下,MnS析出量随着钢液巾硫含量的增加而增加.但足在水冷条件下,MnS的析出量不随钢液中硫含量的增加而变化.当钢液中w([S])＞0.008%时,所有氧化物夹杂表面都会析出MnS夹杂;当0.002%≤w([S])d0.008%时,复合氧化物夹杂中MnO+SiO2含量越高,MnS越容易在氧化物上面析出.复合夹杂物中Ti3O5和Al2O3对MnS的析出没有明显影响.当w([S])＜0.002%时,基本没有MnS夹杂析出.MnS在低熔点氧化物上呈镶嵌状析出,在高熔点上呈包裹状析出.

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