The Composition and Morphology Evolution of Oxide Inclusions in Ti-bearing Ultra Low-carbon Steel Melt Refined in the RH Process
The Composition and Morphology Evolution of Oxide Inclusions in Ti-bearing Ultra Low-carbon Steel Melt Refined in the RH Process
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DOI：
10.2355/isijinternational.50.1606
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发表时间：
2010-11
影响因子：
1.8
通讯作者：
Min Wang;Y. Bao;H. Cui;Hualin Wu;Wei-shuang Wu
中科院分区：
文献类型：
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作者：
Min Wang;Y. Bao;H. Cui;Hualin Wu;Wei-shuang Wu
脱氧前含钛超低碳钢熔体中主要夹杂物为Fe-Mn-O夹杂物。Al加入3 min后，夹杂物由颗粒状变为球状。Al加入熔体7 ~ 10 min后，熔体中形成了由颗粒状和球状组成的Al 2 O3团簇，其直径为1-2 μm。加入钛铁后3 min，形成Ti/（Al+Ti）在0.15 ~ 0.30之间的Al 2 O3·TiOx夹杂物，并在钛铁颗粒和Al 2 O3团簇周围形成富[Ti]区和贫[Al]区，形成Al 2 O3·TiOx团簇。当酸溶铝含量超过0.035%，钛含量低于0.08%时，Ti_3O_5难以形成。复合液相夹杂物中Ti 3 O 5的活性随酸溶铝含量的减少和钛含量的增加而显著增加。
Before deoxidation, the main inclusions were Fe–Mn–O inclusions in Ti-bearing ultra low-carbon steel melt. After 3 min Al addition, the inclusions changed to be granular and spherical Al2O3. Al2O3 cluster, composed of granular and spherical particles with diameter 1–2 μm, formed in 7 to 10 min after Al addition into the melt. Al2O3·TiOx inclusions with the Ti/(Al+Ti) between 0.15 and 0.30 formed 3 min after ferro-titanium addition and Al2O3·TiOx cluster formed because rich [Ti] and poor [Al] regions existed around the ferro-titanium particles and Al2O3 cluster. The Ti3O5 was hard to be formed when acid-soluble aluminum exceeded 0.035% with titanium blow 0.08%. The activity of Ti3O5 in the complex liquid phase inclusions increased remarkably with the decrease of acid-soluble aluminum and increase of titanium.