Effect of Oxygen Content on Size Distribution of Oxides in Steel
Effect of Oxygen Content on Size Distribution of Oxides in Steel
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DOI：
10.2355/isijinternational.35.286
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发表时间：
1995-03
影响因子：
1.8
通讯作者：
Hiroki Goto;K. Miyazawa;Kazuaki Tanaka
中科院分区：
文献类型：
--
作者：
Hiroki Goto;K. Miyazawa;Kazuaki Tanaka
使用钛脱氧钢研究了钢中氧含量对氧化物尺寸分布的影响。观察了连铸钢坯中氧化物的数量和尺寸，并检查了细小的氧化物的体积分数以及在冷却和凝固过程中作为氧化物析出的氧的量。所得结果如下：随着钢中氧含量的增加，主要由Ti2O3、Al2O3和MnO组成的细小复合氧化物的数量和直径增加。钢中的氧几乎全部以氧化物的形式存在，即钢中的氧含量几乎等于氧化物的量。冷却凝固过程中析出的氧化物约占钢中总氧化物量的70%，尺寸大多小于10μm。铸造前存在于钢水中的大多数氧化物也是细小的，因为这些细小的氧化物不能从钢水中漂浮和分离，从而悬浮在钢水中。小于10μm左右的氧化物在钢中总氧化物含量中占有很大比例，并控制着钢中的氧含量。
The effect of the oxygen content in steel on the size distribution of oxides was investigated using Ti deoxidized steels. The number and size of oxides in the continuously cast steel slabs have been observed and the volume fraction of the fine oxides and the amount of oxygen precipitated as oxides during cooling and solidification have been examined. The results obtained are as follows.The number and diameter of the fine complex oxides composed of mainly Ti2O3, Al2O3 and MnO increase with increasing the oxygen content in the steel. Almost all the oxygen in the steel is existing as oxides, namely the oxygen content of the steel is almost equal to the amount of the oxides. The oxides precipitated during the cooling and solidification correspond to about 70% of the total oxide amount in the steel and are mostly smaller than 10 μm in size. Most of oxides present in molten steel before casting are also fine because these fine oxides can not float and separate from the molten steel and are resultantly suspended in the molten steel. The oxides smaller than around 10 μm occupy a large proportion of the total oxide content in the steel and govern the oxygen content in the steel.