Slag system for smelting GH984G nickel base alloys and application method thereof
A GH984G, nickel-based alloy technology, applied in the field of smelting alloys, can solve the problems of poor surface quality of ingots, uneven distribution of easily oxidized elements, etc. The effect of even distribution of elements
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[0043] Example 1
[0044] In this embodiment, figure 1 The T-shaped crystallizer shown, consumable electrode 1, slag pool 2, ingot 3, crystallizer 4, and atmosphere protection device 5. The relationship between the slag depth coefficient and the diameter of the mold is as follows figure 2 Shown.
[0045] In this embodiment, the smelting crystallizer has a diameter of 260mm, and the chemical composition of the slag system of the electroslag remelting smelting nickel-based superalloy is configured according to the following mass percentage: CaF 2 : 41%, CaO: 30%; Al 2 O 3 : 20%; MgO: 3%; TiO 2 : 5%; SiO 2 :1%. The melting point of the slag system is 1221℃, and the density of the ingot slag system is 2.64g·cm at 1600℃ -3 , The resistivity is 0.46Ω·cm.
[0046] Weigh 20 kg of the slag material configured above, put it in a muffle furnace at 800°C for 3 hours before smelting the superalloy, and then cool it down with the furnace.
[0047] A protective atmosphere device is used at the f...
Example Embodiment
[0055] Example 2
[0056] This embodiment is the same as embodiment 1, the difference is that the mass percentage of the chemical composition of the slag system used for the electroslag remelting smelting of nickel-based superalloys: CaF 2 : 42%, CaO: 25%; Al 2 O 3 : 22%; MgO: 3%; TiO 2 :6%; SiO 2 :2%. The melting point of the slag system is 1263℃, and the density of the ingot slag system is 2.60g·cm at a temperature of 1600℃ -3 , The resistivity is 0.51Ω·cm.
[0057] In this embodiment, first weigh 20 kg of the configured slag. Before smelting the superalloy, put the configured slag into a muffle furnace at 800°C for 4 hours and then slowly cool to room temperature with the furnace.
[0058] A protective atmosphere device is used at the furnace mouth and argon gas is introduced; in order to facilitate the arc ignition operation, 25g of fluorite powder (calcium fluoride) and 100g of pre-melted slag after baking are placed around the arc-igniting agent of the T-shaped crystallizer M...
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