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本文探讨了渣面温度对高温合金电渣重熔过程中钛铝控制的影响及金属熔池/渣池界面温度分布与锭表面质量的关系。当结晶器对底水箱不绝缘时,渣面温度较高,熔炼后期氧从大气向渣中转移速度 V_(s-g)~(O_2)比绝缘时大2～3倍,熔炼前期增铝倾向比绝缘时大。炉口电压增加,渣面温度升高,钛烧损量加大。试验条件下,电压增加1伏,钛烧损量约增加0.03%.金属熔池/渣池界面温度分布可用公式 t=aeB/d(B<0)来描述,它对电渣重熔锭表面质量具有决定性影响。文中提出了确定这一分布的方法。锭表面质量可周重熔过程中渣皮厚度的变化来衡量,渣皮厚度δ=B/(lntl)-(lna°)渣池内电流密度分布及结晶器壁附近的热传导条件,渣的液相线温度以及所有影响“高温区间”温度的因素的变化均可导致锭表面质量的改变。
This paper discussed the effect of slag surface temperature on the control of Ti and Al in the ESR process and the relationship between the interface temperature distribution and ingot surface quality. When the mold is not insulated from the bottom water tank, the temperature of the slag surface is high. The transfer rate of oxygen from the atmosphere to the slag in the late stage of melting is 2 ~ 3 times larger than that of the insulation, When big. Furnace mouth voltage increases, the temperature of the slag surface increases, increasing the amount of titanium burning. Under the test conditions, the voltage increase of 1 volt, titanium burning increased by about 0.03% .The metal bath / slag pool interface temperature distribution can be described by the formula t = aeB / d (B <0), which ESR ingot surface Quality has a decisive influence. The paper proposes a method to determine this distribution. The surface quality of the ingot can be measured by the change of the thickness of the skins during the remelting process, the current density distribution in the slag bath δ = B / (lntl) - (lna °) and the heat conduction conditions near the mold wall, Line temperature and all factors that affect the temperature in the “hot zone” can result in changes in ingot surface quality.