Chemical composition and surface quality of ingot are two important technical specifications during electroslag remelting (ESR) of superalloy, which are seriously affected by the physical and chemical properties of the slag. For A-286 superalloy, titanium is required to range from 2.0 to 2.2 wt pct and aluminum is required to range from 0.30 to 0.35 wt pct. Thus, the activity ratio between titania and alumina in slag must be fixed in order to make the reaction 3[Ti] + 2(Al₂O₃) = 4[Al] + 3(TiO₂) be close to thermodynamic equilibrium. This paper focuses on finding a kind of slag with low melting temperature used for producing superalloy containing fixed ratio of titanium and aluminum, which is helpful to improve the surface quality of ESR ingot. In the current study, the thermodynamic equilibrium of 3[Ti] + 2(Al₂O₃) = 4[Al] + 3(TiO₂) between A-286 superalloy and the three slag systems CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: 25: 3: (25−x): x, CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: (25−0.5x): 3: (25−0.5x): x, and CaF₂:CaO:MgO:Al₂O₃:TiO₂ =47: (25−x): 3: 25: x are studied in an electrical resistance furnace based on Factsage software. After obtaining the equilibrium slag with fixed activity ratio between titania and alumina, the melting temperature of three slag systems are studied by slag melting experimental measurements and phase diagram. Three ESR experiments are carried out by using slag CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: 25: 3: 16: 9, CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: 21.3: 3: 21.3: 7.4, and CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: 19: 3: 25: 6. The results show that the slag systems CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: 25: 3: (25−x): x, which consists of slag S (CaF₂:CaO:MgO:Al₂O₃ = 47: 25: 3: 25) and slag A (CaF₂:CaO:MgO:Al₂O₃:TiO₂ = 47: 25: 3: 15: 10), can not only control the aluminum and titanium contents in superalloy ingot but also have the low-melting-temperature property and improve the surface quality of ESR ingot.

钢锭的化学成分和表面质量是高温合金电渣重熔（ESR）过程中的两个重要技术指标，受熔渣物理化学性质的影响很大。对于 A-286 超合金，钛的重量百分比在 2.0 到 2.2 之间，铝的重量百分比在 0.30 到 0.35 之间。_{因此，为了使反应3[Ti] + 2(Al 2} O ₃ ) = 4[Al] + 3(TiO ₂ ) ，必须固定炉渣中二氧化钛和氧化铝的活性比。) 接近热力学平衡。本文重点寻找一种用于生产固定钛铝比高温合金的低熔点炉渣，有助于提高电渣重熔铸锭的表面质量。本研究中A-286高温合金与三种渣系CaF ₂ :CaO:MgO:Al之间的热力学平衡为3[Ti] + 2(Al ₂ O ₃ ) = 4[Al] + 3(TiO _{2 ) 2} O ₃ :TiO ₂  = 47: 25: 3: (25- x ): x , CaF ₂ :CaO:MgO:Al ₂ O ₃ :TiO ₂  = 47: (25-0.5 x): 3: (25-0.5 x ): x和 CaF ₂ :CaO:MgO:Al ₂ O ₃ :TiO ₂ =47: (25- x ): 3: 25: x在基于电阻炉的电阻炉中进行研究在 Factsage 软件上。在得到二氧化钛和氧化铝活性比固定的平衡渣后，通过熔渣实验测量和相图研究了三种熔渣体系的熔化温度。_{采用渣CaF 2} :CaO:MgO:Al ₂ O ₃ :TiO ₂  = 47: 25: 3: 16: 9, CaF ₂ :CaO:MgO:Al ₂ O进行了三个ESR实验₃ :TiO ₂  = 47:21.3:3:21.3:7.4,CaF ₂ :CaO:MgO:Al ₂ O ₃ :TiO ₂  = 47:19:3:25:6。结果表明渣系CaF ₂ :CaO:MgO:Al ₂ O ₃ :TiO ₂  = 47: 25: 3: (25− x ): x，由渣S组成 (CaF ₂ :CaO:MgO:Al ₂ O ₃  = 47: 25: 3 : 25) 和炉渣 A (CaF ₂ :CaO:MgO:Al ₂ O ₃ :TiO ₂ = 47:25:3:15:10)，不仅可以控制高温合金锭中的铝和钛含量，而且具有低熔点性能，提高ESR锭的表面质量。