CN114015890B - High-alloying high-temperature alloy electroslag remelting slag system and application thereof - Google Patents

Abstract

The invention relates to the technical field of high-temperature alloy electroslag remelting and smelting, in particular to a method for melting a high-temperature alloyIt relates to a high-alloying high-temperature alloy electroslag remelting slag system and application thereof. The high-alloying high-temperature alloy electroslag remelting slag system comprises the following components in percentage by mass: CaF₂ 45%~55%、Al₂O₃ 15%~25%、CaO 15%~25%、MgO 1%~5%、TiO₂ 0.5%~5%、ZrO₂0.5% -5% and LiF 5% -10%. The invention reduces the melting point of the slag system through component regulation, ensures proper viscosity, improves the surface tension between the metal melt and the slag liquid, can improve the fluidity of the slag under the condition of ensuring heat input under the condition of low melting speed, and ensures the internal and surface metallurgical quality of the smelting cast ingot.

Description

Electroslag Remelting Slag System of Highly Alloyed Superalloy and Its Application

technical field

The invention relates to the technical field of high-temperature alloy electroslag remelting and melting, in particular to a high-alloying high-temperature alloy electroslag remelting slag system and its application.

Background technique

In order to meet the higher temperature requirements of superalloys, the content of solid solution strengthening elements Cr, Co, W, Mo, etc. in the alloy, as well as the strengthening phase forming elements Ti, Al, Nb, Ta, etc., continue to increase, which makes the initial melting point of superalloys. lower, the solid-liquid two-phase region of alloy solidification is wider. In the electroslag remelting process, the melting point of the slag system should be 100~200°C lower than that of the molten metal to ensure smooth melting and solidification. For superalloys with a lower initial melting point, the smelting process is more difficult and the slag system is poorly matched.

Low-melting slag is used for electroslag remelting continuous directional solidification technology to prepare superalloy directional solidification ingots. Using some existing electroslag remelting continuous directional solidification devices, high-purity crystal, low segregation superalloy directional solidification ingots can be prepared in batches. For example, in the patent application with publication number CN102021348A, the equipment used includes an ingot extraction device. The ingot extraction device requires the slag system to have suitable viscosity and strength at the same time to ensure the surface quality and process stability of the smelting ingot.

If the melting point of the slag system is too low, the electrical conductivity will increase, and the heat generated by the slag will be insufficient, which will cause defects such as voids, pores, and inclusions in the ingot. quality and surface quality, resulting in metallurgical defects. When the conventional quaternary slag CaF ₂ -CaO-Al ₂ O ₃ -MgO is used in the superalloy with higher content of strengthening phase and lower melting point, in order to reduce the stress when smelting by electroslag remelting continuous directional solidification technology, it is necessary to use a lower The smelting speed, thereby reducing the heat input, will inevitably affect the fluidity of the slag, affect the material transfer between the slag and the gold, and reduce the internal metallurgical quality of the smelted ingot. Therefore, conventional slag has been unable to meet the needs of electroslag remelting continuous directional solidification to smelt high strengthening phase content and low melting point superalloy.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-alloying superalloy electroslag remelting slag system, so as to solve the problem that the conventional slag existing in the prior art cannot satisfy the continuous directional solidification of electroslag remelting and smelting high-strengthening phase content and low melting point superalloy technology. question.

Another object of the present invention is to provide the application of electroslag remelting slag system of highly alloyed superalloy in electroslag remelting continuous directional solidification ingot smelting.

In order to realize the above-mentioned purpose of the present invention, the following technical solutions are specially adopted:

High alloyed superalloy electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 45%~55%, Al ₂ O ₃ 15%~25%, CaO 15%~25%, MgO 1%~5%, TiO ₂ 0.5%~5%, ZrO ₂ 0.5%~5% and LiF 5 %~10%.

The high-alloying superalloy electroslag remelting slag system of the present invention can reduce the melting point, viscosity and surface tension of the slag system through composition control, can improve the fluidity and viscosity of the slag under the condition of ensuring heat input, and ensure The internal metallurgical quality of smelted ingots reduces the tendency of hot cracking caused by excessive thermal stress, and also ensures the stability of ingot extraction and the surface quality of smelted ingots, which can solve the problem of reduced heat input during slow smelting of superalloys, etc. The resulting reduction in the fluidity of the molten slag results in a reduction in the metallurgical quality, etc.

In a specific embodiment of the present invention, the highly alloyed superalloy electroslag remelting slag system includes the following components by mass percentage: CaF ₂ 45%-50%, Al ₂ O ₃ 15%-20% , CaO 20%~25%, MgO 3%~5%, TiO ₂ 0.5%~2%, ZrO ₂ 0.5%~2% and LiF 5%~9%.

In a specific embodiment of the present invention, in the highly alloyed superalloy electroslag remelting slag system, in terms of mass percentage, the impurity content is less than or equal to 1%.

In a specific embodiment of the present invention, in the highly alloyed superalloy electroslag remelting slag system, the sum of the mass percentages of CaF ₂ and LiF is 52% to 56%. Further, in the highly alloyed superalloy electroslag remelting slag system, the mass ratio of CaF ₂ to LiF is (5-9):1, preferably (6-8):1.

In a specific embodiment of the present invention, the highly alloyed superalloy electroslag remelting slag system is granular, and the particle size is 1-10 mm.

In a specific embodiment of the present invention, the mass percentage of the strengthening phase of the highly alloyed superalloy is 35% to 60%, and the initial melting point of the highly alloyed superalloy is 1100 to 1280°C.

In a specific embodiment of the present invention, the highly alloyed superalloy includes any one or more of GH4198 alloy, GH4198D alloy, GH4151 alloy, GH4175 alloy, GH4975 alloy, and the like.

The present invention also provides the application of any one of the above-mentioned highly alloyed superalloy electroslag remelting slag systems in electroslag remelting continuous directional solidification ingot smelting.

In a specific embodiment of the present invention, the electroslag remelting continuous directional solidification ingot smelting method is ingot extraction type electroslag remelting continuous directional solidification smelting. Further, the speed of the ingot extraction is 2~5mm/min.

In a specific embodiment of the present invention, the electrode rod used in the electroslag remelting continuous directional solidification ingot smelting is an electrode rod obtained by vacuum induction melting and casting.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The present invention reduces the melting point of the slag system through component control, ensures proper viscosity, increases the surface tension between the metal melt and the slag liquid, and can improve the fluidity of the slag under the condition of ensuring heat input, ensuring that The internal metallurgical quality of the smelted ingots reduces the tendency of hot cracking caused by excessive thermal stress, and also ensures the stability of the ingots and the surface quality of the smelted ingots, which can solve the problems caused by the melting of superalloys at a slower melting rate. Problems such as reduction of metallurgical quality due to reduction of slag fluidity due to reduction of heat input, etc.

(2) The slag system of the present invention can effectively ensure the heat input of smelting when the electroslag remelting continuous directional solidification equipment smelts high-strength phase content and low melting point superalloy, improves the fluidity of slag, improves the stability of the smelting process, and increases the Inclusions and slag liquid are the degree of wetting, so that the number of inclusions in the ingot obtained by smelting is reduced and there is no cracking.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the riser of the superalloy directional solidification ingot obtained by smelting in Example 1 of the present invention;

Fig. 2 is the riser of the superalloy directional solidification ingot obtained by the smelting of Comparative Example 1;

Fig. 3 is the surface quality diagram of the superalloy directional solidification ingot obtained by smelting in Example 1 of the present invention;

4 is a surface quality diagram of a superalloy directional solidification ingot obtained by smelting in Comparative Example 1.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, It is only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. If the specific conditions are not indicated in the examples, it is carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used without the manufacturer's indication are conventional products that can be purchased from the market.

High alloyed superalloy electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 45%~55%, Al ₂ O ₃ 15%~25%, CaO 15%~25%, MgO 1%~5%, TiO ₂ 0.5%~5%, ZrO ₂ 0.5%~5% and LiF 5 %~10%.

The high-alloyed superalloy electroslag remelting slag system of the present invention can reduce the melting point of the slag system, ensure proper viscosity, and improve the surface tension between the molten steel and the slag by adjusting the composition, and can ensure the heat input under the condition of , improve the fluidity of the slag, ensure the internal metallurgical quality of the smelting ingot, reduce the tendency of hot cracking caused by excessive thermal stress, and also ensure the stability of the ingot extraction and the surface quality of the smelting ingot, which can solve the problem of high temperature alloys in the In slow smelting, the problem of metallurgical quality degradation due to reduced slag fluidity due to reduced heat input, etc.

As in different embodiments, the amount of each component in the highly alloyed superalloy electroslag remelting slag system can be respectively as follows in terms of mass percentage:

The amount of CaF ₂ can be 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, etc.; as a flux, CaF ₂ itself is low Melting point compound to ensure low viscosity and good fluidity of slag in molten state;

The amount of Al ₂ O ₃ can be 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, etc.; Al ₂ O ₃ is an acid oxidation It can adjust the alkalinity of the slag, which can significantly reduce the electrical conductivity of the slag, reduce power consumption and improve productivity;

The amount of CaO can be 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, etc.; CaO can increase the alkalinity of the slag and improve the desulfurization efficiency, and reduce the conductivity of slag;

The amount of MgO can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.; MgO can improve the activity of Ti ₃ O ₅ and Al ₂ O ₃ in the slag. It reduces the activity coefficient of TiO ₂ in the slag, inhibits the role of TiO ₂ in transmitting and supplying oxygen, improves the stability of the mold slag and improves the fluidity;

The amount of TiO ₂ can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.; TiO ₂ can inhibit the burning loss of titanium, but it is The variable valence oxide will transfer oxygen supply to the molten metal pool. When used in conjunction with MgO, it can take into account the effect of inhibiting titanium burning loss and avoid transfer and supply, improving stability and fluidity;

The amount of ZrO ₂ can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.; ZrO ₂ is an acidic oxide, which can reduce the conductivity of the slag It can inhibit the burning loss of zirconium in superalloys containing trace Zr, and Zr has the effect of strengthening grain boundaries; the combination of TiO ₂ and ZrO ₂ can control the uniformity of smelting metal components;

The amount of LiF can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, etc.; LiF can be used as a flux, its melting point is 850 ℃, within a certain dosage range, it can reduce the liquidus temperature, viscosity, surface tension and electrical conductivity of slag in combination with other components.

The invention controls the composition of the slag system and adds a certain amount of TiO ₂ , ZrO ₂ and LiF on the basis of the quaternary slag system, so as to reduce the melting point of the slag system, ensure proper viscosity and surface tension, and ensure the heat input under the condition of , to improve the fluidity of the slag and ensure the internal and surface metallurgical quality of the smelted ingot.

In a specific embodiment of the present invention, the highly alloyed superalloy electroslag remelting slag system includes the following components by mass percentage: CaF ₂ 45%-50%, Al ₂ O ₃ 15%-20% , CaO 20%~25%, MgO 3%~5%, TiO ₂ 0.5%~2%, ZrO ₂ 0.5%~2% and LiF 5%~9%.

In a specific embodiment of the present invention, the highly alloyed superalloy electroslag remelting slag system includes the following components by mass percentage: CaF ₂ 45%-48%, Al ₂ O ₃ 18%-20% , CaO 20%~22%, MgO 3%~4%, TiO ₂ 0.5%~1.5%, ZrO ₂ 0.5%~1% and LiF 6%~9%.

In a specific embodiment of the present invention, in the highly alloyed superalloy electroslag remelting slag system, in terms of mass percentage, the impurity content is less than or equal to 1%.

In a specific embodiment of the present invention, in the highly alloyed superalloy electroslag remelting slag system, the sum of the mass percentages of CaF ₂ and LiF is 52% to 56%. Further, in the highly alloyed superalloy electroslag remelting slag system, the mass ratio of CaF ₂ to LiF is (5-9):1, preferably (6-8):1.

As in different embodiments, the sum of the mass percentages of CaF ₂ and _LiF may be 52%, 52.5%, 53%, 53.5%, 54%, 54.5%, 55%, 55.5%, 56%, etc.; The mass ratio of LiF can be 5:1, 5.5:1, 6:1, 6.5:1, 7:1, 7.5:1, 8:1, 8.5:1, 9:1 and so on.

In the present invention, by introducing a certain amount of LiF and cooperating with CaF ₂ and other components, it can ensure a proper low melting point and improve the quality of the smelted alloy.

In a specific embodiment of the present invention, the highly alloyed superalloy electroslag remelting slag system is granular, and the particle size is 1-10 mm.

In a specific embodiment of the present invention, the mass percentage of the strengthening phase of the highly alloyed superalloy is 35% to 60%, and the initial melting point of the highly alloyed superalloy is 1100 to 1280°C.

As in different embodiments, the mass percentage content of the strengthening phase of the high-alloying superalloy may be 35%, 40%, 45%, 50%, 55%, 60%, etc.; the high-alloying high temperature The initial melting point of the alloy may be 1100°C, 1150°C, 1200°C, 1250°C, 1280°C, and the like.

In a specific embodiment of the present invention, the highly alloyed superalloy includes any one or more of GH4198 alloy, GH4198D alloy, GH4151 alloy, GH4175 alloy and GH4975 alloy, but not limited thereto, the rest of the high alloying degree The alloy can also be electroslag remelted using the slag system of the present invention.

The present invention also provides the application of any one of the above-mentioned highly alloyed superalloy electroslag remelting slag systems in electroslag remelting continuous directional solidification ingot smelting.

In a specific embodiment of the present invention, the electroslag remelting continuous directional solidification ingot smelting method is ingot extraction type electroslag remelting continuous directional solidification smelting. Further, the speed of the ingot extraction is 2~5mm/min.

As in various embodiments, the speed of the ingot extraction may be 2 mm/min, 2.5 mm/min, 3 mm/min, 3.5 mm/min, 4 mm/min, 4.5 mm/min, 5 mm/min, and the like.

For high-alloyed superalloy materials, the strengthening phase of the material is more than 50%, the melting stress is very large, and ingot cracking is prone to occur. In the case of slow melting, the internal stress can be appropriately reduced to reduce cracking; However, in the case of slow smelting, the heat input is reduced, which in turn affects the fluidity, affects the material transfer between slag and gold, and reduces the surface and internal quality of the smelted ingot; therefore, the existing slag system cannot meet the electrical requirements. Demand for continuous directional solidification of slag remelting to smelt high strengthening phase content and low melting point superalloys. In the present invention, the slag system components are adjusted and controlled, so that in the case of slow smelting, the smelting heat input is guaranteed, the fluidity of the slag is improved, the stability of the smelting process is improved, and the surface and internal quality of the smelting ingot are improved.

Taking the GH4198 alloy as an example, when the directional solidification ingot of the corresponding GH4198 alloy is obtained by electroslag remelting continuous directional solidification, the average η phase size between the dendrites is ≤22 μm, such as 20~22 μm; for the GH4198 alloy ingot with a diameter of 270 mm, the melting The depth of the pool is less than or equal to 122mm, such as 120~120mm, the depth of the slag groove is less than or equal to 3mm, and the surface is smooth and free of cracks.

In a specific embodiment of the present invention, the electrode rod used in the electroslag remelting continuous directional solidification ingot smelting is an electrode rod obtained by vacuum induction melting and casting.

In actual operation, conventional electroslag remelting continuous directional solidification device with ingot extraction device can be used to carry out the smelting, for example, the vacuum/gas protection electroslag remelting continuous directional solidification device and method described in publication number CN102021348A can be used to carry out the smelting. the smelting.

Example 1

The present embodiment provides a highly alloyed superalloy electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 48%, Al ₂ O ₃ 19%, CaO 21%, MgO 3.5%, TiO ₂ 1%, ZrO ₂ 0.5%, and LiF 6%, and the balance was unavoidable impurities.

The preparation of the slag system includes: mixing according to the above-mentioned proportion to prepare a granular slag system with a particle size of 1-10 mm.

The present embodiment also provides a method for smelting GH4198 alloy ingots through electroslag remelting continuous directional solidification using the above-mentioned slag system, using the device described in the publication number CN102021348A, including the following steps:

After the above-mentioned slag system is baked in a conventional slag material baking furnace, the baked slag system is melted in the slag furnace, and then poured into a crystallizer with a diameter of 274 mm. The GH4198 electrode rod is inserted into the molten slag for electroslag remelting and continuous directional solidification to smelt the GH4198 alloy ingot with a diameter of 270mm.

The main components of GH4198 alloy are: C 0.01wt%~0.03wt%, Cr 12wt%~14wt%, Co 19.5wt%~21.5wt%, W 2.1wt%~2.5wt%, Mo 3.6wt%~4wt%, Al 3wt% %~3.6wt%, Ti 3.5wt%~3.9wt%, Ta2.3wt%~2.7wt%, Zr 0.03wt%~0.07wt%, B 0.01wt%~0.02wt% and balance Ni.

Example 2

The present embodiment provides a highly alloyed superalloy electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 45%, Al ₂ O ₃ 20%, CaO 20%, MgO 3.5%, TiO ₂ 1%, ZrO ₂ 1%, and LiF 9%, and the balance was unavoidable impurities.

This embodiment also provides a method for smelting GH4198 alloy ingots through electroslag remelting and continuous directional solidification using the above-mentioned slag system. Referring to Example 1, the only difference is that the slag system is different. The electroslag remelting continuous directional solidification smelts the GH4198 alloy ingot.

Example 3

The present embodiment provides a highly alloyed superalloy electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 50%, Al ₂ O ₃ 19%, CaO 20%, MgO 3.5%, TiO ₂ 1%, ZrO ₂ 1%, and LiF 5%, and the balance was unavoidable impurities.

This embodiment also provides a method for smelting GH4198 alloy ingots through electroslag remelting and continuous directional solidification using the above-mentioned slag system. Referring to Example 1, the only difference is that the slag system is different. The electroslag remelting continuous directional solidification smelts the GH4198 alloy ingot.

Comparative Example 1

Comparative Example 1 provides an electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 55%, Al ₂ O ₃ 21%, CaO 20%, MgO 3.5%, and the balance is unavoidable impurities.

Comparative Example 1 also provides a method for smelting GH4198 alloy ingots by electroslag remelting and continuous directional solidification using the above-mentioned slag system. Referring to Example 1, the difference is that the slag system is different. The electroslag remelting continuous directional solidification smelting GH4198 alloy ingot.

Comparative Example 2

Comparative Example 2 provides an electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 52%, Al ₂ O ₃ 20%, CaO 19%, MgO 3.5%, TiO ₂ 1%, ZrO ₂ 1%, and LiF 3%, and the balance was unavoidable impurities.

Comparative Example 2 also provides a method for smelting GH4198 alloy ingots through electroslag remelting and continuous directional solidification using the above-mentioned slag system. Referring to Example 1, the difference is that the slag system is different. The electroslag remelting continuous directional solidification smelting GH4198 alloy ingot.

Comparative Example 3

Comparative Example 3 provides an electroslag remelting slag system, including the following components by mass percentage:

CaF ₂ 48%, Al ₂ O ₃ 18%, CaO 18%, MgO 3.5%, TiO ₂ 1%, ZrO ₂ 1%, and LiF 12%, and the balance was unavoidable impurities.

Comparative Example 3 also provides a method for smelting GH4198 alloy ingots by electroslag remelting and continuous directional solidification using the above-mentioned slag system. Referring to Example 1, the difference is that the slag system is different. The electroslag remelting continuous directional solidification smelting GH4198 alloy ingot.

Experimental example 1

In order to compare and illustrate the effects of different slag systems on the quality of the obtained ingots during electroslag remelting and continuous directional solidification to smelt alloy ingots, samples were taken from the upper parts of the ingots obtained in different examples and comparative examples, respectively, and the Inclusion statistics, the statistical results are shown in Table 1.

Table 1 Inclusions of GH4198 alloy directionally solidified ingots obtained in different examples and comparative examples

It can be seen from the above comparison that the GH4198 alloy directional solidification ingot obtained by smelting the slag system of the present invention has fewer inclusions, which further illustrates that the slag system of the present invention has better fluidity under the condition of slow smelting, and more It is beneficial to material transfer, and the removal effect of inclusions is better.

Figures 1 to 4 are the riser and surface quality diagrams of the GH4198 alloy directionally solidified ingots obtained in Example 1 and Comparative Example 1 of the present invention, respectively. As can be seen from the figure, by comparing the riser conditions and surface quality conditions of the GH4198 alloy directional solidification ingots obtained by different examples and comparative examples, it is found that the GH4198 alloy directional solidification ingot obtained by smelting the slag system of the present invention has a flat head and No cracks were found, but the ingots obtained from the slag system of the comparative example showed obvious cracks.

The quality of the alloy ingots smelted by continuous directional solidification of different slag systems in electroslag remelting was further characterized, as shown in Table 2.

Table 2 Characteristics of directional solidification ingots of GH4198 alloy obtained by different examples and comparative examples

Slag series Weld pool depth/mm Average interdendritic η phase size at 1/2 radius of ingot/μm Cracking condition Slag groove depth/mm Example 1 120 20 not cracked 3 Example 2 122 twenty two not cracked 2.5 Example 3 125 twenty three not cracked 3 Comparative Example 1 135 29 cracked 4 Comparative Example 2 135 25 cracked 3.5 Comparative Example 3 140 30 cracked 2.5

It can be seen from the above results that in the slag system of Comparative Example 1, no LiF was added, the depth of the slag groove was deep, the surface quality of the ingot after smelting was poor, the material yield was low, the depth of the molten pool during the smelting process was deep, and the interdendritic harmful phase The size of the η phase reaches 29 μm, and the thermal stress caused by it is large, and the cracking of the ingot occurs. Compared with Comparative Example 1, the amount of LiF used in Comparative Example 2 was lower, and the depth of the slag groove was improved, but the effect was still poor. In Comparative Example 3, the amount of LiF is relatively high. Although the surface quality of the ingot is greatly improved, the depth of the molten pool is large, the size of the interdendritic harmful phase is large, and the ingot is prone to cracks.

The slag system of the invention can effectively ensure the smelting heat input when the electroslag remelting continuous directional solidification equipment smelts the high-strengthened phase content and low melting point superalloy, improves the fluidity of the slag, improves the stability of the smelting process, and makes the smelting obtained The number of ingot inclusions is reduced and there is no cracking.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (7)

1. high-alloying superalloy electroslag remelting slag system, is characterized in that, comprises the following components by mass percentage: CaF ₂ 45%~50%, Al ₂ O ₃ 15%~20%, CaO 20%~25%, MgO 3%~5%, TiO ₂ 0.5%~2%, ZrO ₂ 0.5%~2% and LiF 5 %~9%; The sum of the mass percentages of CaF ₂ and LiF is 52%~56%; The mass percentage content of the strengthening phase of the high-alloying superalloy is 35%-60%, and the initial melting point of the high-alloying superalloy is 1100-1280°C. 2. The high-alloying superalloy electroslag remelting slag system according to claim 1, wherein in the high-alloying superalloy electroslag remelting slag system, the mass ratio of CaF to LiF is ( ₅ ~9): 1. 3 . The high-alloying superalloy electroslag remelting slag system according to claim 1 , wherein the high-alloying superalloy electroslag remelting slag system is granular, and the particle size is 1-10 mm. 4 . 4. The electroslag remelting slag system of high-alloying superalloy according to claim 1, wherein the high-alloying superalloy comprises any one of GH4198 alloy, GH4198D alloy, GH4151 alloy, GH4175 alloy and GH4975 alloy. A sort of. 5. The application of the highly alloyed superalloy electroslag remelting slag system of any one of claims 1-4 in electroslag remelting continuous directional solidification ingot smelting. 6 . The application according to claim 5 , wherein the electroslag remelting continuous directional solidification ingot smelting method is ingot extraction type electroslag remelting continuous directional solidification smelting. 7 . 7. The application according to claim 6, wherein the speed of the ingot extraction is 2～5mm/min.

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