MnS在Ti-Al复合脱氧氧化物上的析出研究  

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

作　　者：杨成威[1] 吕迺冰[1] 卓晓军[1,2] 王新华[1] 王万军[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]中国五矿集团公司,北京100044

出　　处：《钢铁》2010年第11期32-36,共5页Iron and Steel

摘　　要：采用高温电阻炉,通过改变不同冷却条件和不同硫含量,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析出量随着钢液中硫含量的增加而增加。但是在水冷条件下,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])<0.008%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。The phenomenon that MnS inclusion precipitates on surface of Ti-Al de-oxidation complex inclusion was studied systematically in lab by utilizing resistance furnace. The effect of Ti-Al complex inclusions on MnS precipitation amount and morphology was investigated by varying the cooling rate and the content of S in steel. The experiments demonstrate that the cooling rate on the precipitation of MnS has a significant impact. When the S content in liquid steel from 0. 001% to 0.01%, under the furnace cooling conditions, MnS precipitation amount as the S content in liquid steel increases. However, in water-cooled conditions, MnS precipitation is no change with increase in S content of liquid steel. When the w（[S]）〉0. 008%, all the surface of oxide inclusions are precipitated MnS inclusions; when 0. 002 ≤w（[S]）〈0. 008%, the higher the composite oxide inclusions in the （MnO ＋ SiO2 ） content, more easily MnS in the oxide above the precipitation. No obvious affect of Tia O3 and Al2O3 is found on MnS precipitation on complex inclusions. When w（[S]） 〈0. 002%, no MnS inclusions are precipitated. In the low melting point oxides, MnS takes on mosaic-like precipitation. In the high melting point oxides, MnS is encapsulated.

关 键 词：MNS 氧化物冶金 析出 Ti—Al复合脱氧 

分 类 号：TF703.8[冶金工程—钢铁冶金]