MnS在Ti-Al复合脱氧氧化物上的析出研究
来源期刊:钢铁2010年第11期
论文作者:杨成威 吕迺冰 卓晓军 王新华 王万军
文章页码:32 - 36
关键词:MnS; 氧化物冶金; 析出; Ti-Al复合脱氧
Key words:MnS; oxide metallurgy; precipitation; Ti-Al complex inclusion
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。
Abstract: 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 Ti3O5 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.
杨成威1,吕迺冰1,卓晓军1,王新华1,王万军1
(1.北京市北京科技大学 冶金与生态工程学院)
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。
关键词:MnS; 氧化物冶金; 析出; Ti-Al复合脱氧