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对于钛合金化铝镇静钢,热力学计算结果显示,稳定的脱氧产物为Al2O3,Al2TiO5只有在钢中铝的质量分数低于0.008%后才会形成。通过对Ti-IF钢实际冶炼过程中的取样分析发现:加入钛铁后,钢中会出现不稳定的Al-Ti复合氧化物,可能是钛铁中的钛氧化物与钢中铝逐渐反应而形成的产物;浇铸过程中,中间包覆盖剂中SiO2等可还原性氧化物含量比较高时,在钢-渣界面处铝的损失非常严重,因此在靠近钢液侧就会产生局部富钛区域,从而满足生成Al2TiO5或者Ti3O5的热力学条件,在湍流运动的条件下,生成的钛氧化物很容易被卷入钢液内部。
For the titanium alloyed killed steel, the thermodynamic calculation results show that the stable deoxidation product is Al2O3, and Al2TiO5 is formed only when the mass fraction of aluminum in the steel is less than 0.008%. Through the sampling analysis of Ti-IF steel in the actual smelting process, it is found that after adding ferrotitanium, the unstable Al-Ti composite oxide may appear in the steel, which may be due to the gradual reaction of the titanium oxide in the ferrotitanium with the aluminum in the steel The loss of aluminum is very serious at the steel-slag interface, so the local titanium-rich region will be generated near the molten steel side during the casting process. When the content of reducible oxide such as SiO2 in the tundish is relatively high, , So as to meet the thermodynamic conditions of generating Al2TiO5 or Ti3O5. Under turbulent flow conditions, the generated titanium oxide can be easily entangled in the molten steel.