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本文研究了GH132和GH136合金电渣重熔过程钛烧损的某些机理,发现渣中TiO_2浓度较高时,(TiO_2)是[Ti]烧损的主要氧化剂。与[Ti]相平衡的渣中钛的低价氧化物主要是Ti_3O_5,决定[Ti]烧损速率的主要因素是Ti~(4+)在钢/渣界面层的传质速度,该传质速度随着渣中TiO_2浓度的增加而增大。降低Ti~(3+)向渣/气界面的扩散速度是减少[Ti]烧损的关键环节。实验研究了CaF_2-Al_2O_3-TiO_2渣系中Ti~(4+)在电极/熔渣和金属熔池/溶渣界面1700±10℃时的传质系数与渣中TiO_2含量之关系;测定了Ti~(3+)向渣/气界面(温度为1500℃)的传质系数为2.2×10~(-1)厘米/移。
In this paper, some mechanisms of titanium loss during ESR of GH132 and GH136 alloys were studied. It was found that (TiO 2) was the main oxidant of [Ti] burning when the concentration of TiO 2 in slag was high. The main oxide of titanium in the slag which is in balance with [Ti] is Ti 3 O 5. The main factor determining the rate of [Ti] burning loss is the mass transfer rate of Ti 4+ in the steel / slag interface layer. The velocity increases with the increase of TiO 2 concentration in the slag. Reducing the diffusion rate of Ti ~ (3 +) to the slag / gas interface is a key step to reduce [Ti] burning. The relationship between the mass transfer coefficient of Ti ~ (4 +) in slag and the content of TiO_2 in slag was investigated experimentally at 1700 ± 10 ℃ in electrode / slag and molten metal / slag interface. The effects of Ti The mass transfer coefficient of ~ (3 +) to the slag / air interface (temperature 1500 ℃) is 2.2 × 10 ~ (-1) cm /