CN114015890B - High-alloying high-temperature alloy electroslag remelting slag system and application thereof - Google Patents
High-alloying high-temperature alloy electroslag remelting slag system and application thereof Download PDFInfo
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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
Technical Field
The invention relates to the technical field of high-temperature alloy electroslag remelting smelting, in particular to a high-alloying high-temperature alloy electroslag remelting slag system and application thereof.
Background
In order to meet the use requirement of higher temperature, the content of solid solution strengthening elements such as Cr, Co, W, Mo and the like and strengthening phase forming elements such as Ti, Al, Nb, Ta and the like in the alloy is increased continuously, so that the initial melting point of the high-temperature alloy is lower, and the solid-liquid two-phase region range of the alloy solidification is wider. In the electroslag remelting process, the melting point of a slag system is required to be 100-200 ℃ lower than that of the gravity melting metal, so that the smooth proceeding of melting and solidification can be ensured. For high-temperature alloys with lower initial melting points, the difficulty of the smelting process is increased, and the slag system matching property is poor.
The low-melting-point slag system is used for preparing high-temperature alloy directionally solidified ingots by an electroslag remelting continuous directional solidification technology, and the existing partial electroslag remelting continuous directional solidification device can be used for preparing high-purity crystal and low-segregation high-temperature alloy directionally solidified ingots in batches. For example, patent application No. CN102021348A, the apparatus used therein includes an ingot extractor which requires a slag system with suitable viscosity and strength to ensure the surface quality and process stability of the melted ingot.
The slag system has too low melting point, which can cause the conductivity to rise and the heat productivity of the slag to be insufficient, so that the cast ingot has defects of cavities, air holes, inclusions and the like; the melting point is too high, so that the conductivity is reduced, the viscosity of a slag system is increased, the internal quality and the surface quality of an ingot are influenced, and metallurgical defects are generated. When the high-temperature alloy with higher strengthening phase content and lower melting point uses the conventional quaternary slag CaF2-CaO-Al2O3When MgO is smelted by an electroslag remelting continuous directional solidification technology, a lower smelting speed is needed for reducing stress, so that heat input is reduced, and the reduction of the heat input inevitably influences the fluidity of slag, influences the material transfer between slag and gold and reduces the internal metallurgical quality of a smelted ingot. Therefore, the conventional slag can not meet the requirement of electroslag remelting continuous directional solidification smelting of low-melting point and high-temperature alloy with high strengthening phase content.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a high-alloying high-temperature alloy electroslag remelting slag system to solve the technical problem that conventional slag in the prior art cannot meet the requirement of continuous directional solidification smelting of low-melting-point high-temperature alloy with high strengthening phase content through electroslag remelting and the like.
The invention also aims to provide the application of the high-alloying high-temperature alloy electroslag remelting slag system in the smelting of continuous directional solidification ingot casting through electroslag remelting.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
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%.
According to the high-alloying high-temperature alloy electroslag remelting slag system, the melting point, viscosity and surface tension of the slag system are reduced through component regulation, the fluidity and viscosity of molten slag can be improved under the condition of ensuring heat input, the internal metallurgical quality of a smelting ingot is ensured, the hot cracking tendency caused by overlarge thermal stress is reduced, the stability of a stripping ingot and the surface quality of the smelting ingot are also ensured, and the problem of metallurgical quality reduction caused by the reduction of the fluidity of the molten slag due to the reduction of the heat input and the like during slow smelting of a high-temperature alloy can be solved.
In a specific embodiment of the invention, the high-alloying superalloy electroslag remelting slag system comprises the following components in percentage by mass: CaF2 45%~50%、Al2O3 15%~20%、CaO 20%~25%、MgO 3%~5%、TiO2 0.5%~2%、ZrO20.5% -2% and LiF 5% -9%.
In the specific implementation mode of the invention, in the high-alloying high-temperature alloy electroslag remelting slag system, the impurity content is less than or equal to 1 percent by mass.
In a particular embodiment of the invention, the high alloying is highCaF in warm alloy electroslag remelting slag system2The sum of the mass percent of the LiF and the mass percent of the LiF is 52-56%. Further, in the high-alloying high-temperature alloy electroslag remelting slag system, CaF2The mass ratio of the LiF to the LiF is (5-9): 1, and preferably (6-8): 1.
In a specific embodiment of the invention, the high-alloying high-temperature alloy electroslag remelting slag is granular, and the granularity is 1-10 mm.
In the specific implementation mode of the invention, the mass percentage content of the strengthening phase of the high-alloying high-temperature alloy is 35-60%, and the initial melting point of the high-alloying high-temperature alloy is 1100-1280 ℃.
In a specific embodiment of the invention, the high-alloying high-temperature alloy comprises any one or more of GH4198 alloy, GH4198D alloy, GH4151 alloy, GH4175 alloy, GH4975 alloy and the like.
The invention also provides application of any one of the high-alloying high-temperature alloy electroslag remelting slag systems in electroslag remelting continuous directional solidification ingot casting smelting.
In a specific embodiment of the invention, the method for smelting the electroslag remelting continuous directional solidification ingot is ingot drawing type electroslag remelting continuous directional solidification smelting. Further, the speed of the ingot is 2-5 mm/min.
In a specific embodiment of the invention, the electrode rod adopted in the smelting of the electroslag remelting continuous directional solidification ingot is obtained by vacuum induction melting and casting.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, through component regulation and control, the melting point of a slag system is reduced, proper viscosity is ensured, the surface tension between a metal melt and slag liquid is improved, the fluidity of molten slag can be improved under the condition of ensuring heat input, the internal metallurgical quality of a smelting ingot is ensured, the hot cracking tendency caused by overlarge thermal stress is reduced, the stability of ingot drawing and the surface quality of the smelting ingot are also ensured, and the problem of metallurgical quality reduction caused by the reduction of the fluidity of the molten slag due to the reduction of heat input and the like when a high-temperature alloy is smelted under the condition of a slower melting speed can be solved.
(2) The slag system can effectively ensure the heat input of smelting when the high strengthening phase content and low melting point high temperature alloy is smelted by the electroslag remelting continuous directional solidification equipment, improve the fluidity of the slag, improve the stability of the smelting process, increase the wetting degree of the inclusion and slag liquid, and reduce the number of the ingot casting inclusion obtained by smelting without cracking.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a riser of a high-temperature alloy directional solidification ingot obtained by smelting in example 1 of the invention;
FIG. 2 is a riser of a directionally solidified superalloy ingot obtained by smelting in comparative example 1;
FIG. 3 is a surface quality diagram of a high temperature alloy directionally solidified ingot obtained by smelting in example 1 of the present invention;
FIG. 4 is a surface quality chart of a directionally solidified superalloy ingot obtained by smelting in comparative example 1.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
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%.
According to the high-alloying high-temperature alloy electroslag remelting slag system, the melting point of the slag system is reduced through component regulation, proper viscosity is guaranteed, surface tension between molten steel and slag liquid is improved, the fluidity of molten slag can be improved under the condition of guaranteeing heat input, the internal metallurgical quality of a smelting ingot is guaranteed, the hot cracking tendency caused by overlarge thermal stress is reduced, the stability of a stripping ingot and the surface quality of the smelting ingot are guaranteed, and the problem that the metallurgical quality is reduced due to the reduction of the fluidity of the molten slag caused by the reduction of the heat input and the like when a high-temperature alloy is smelted at a low speed can be solved.
For example, in different embodiments, the amounts of the components in the high-alloying superalloy electroslag remelting slag system can be respectively as follows by mass percent:
CaF2amounts of may be 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, etc.; CaF2As a fluxing agent, the self-body is a low-melting-point compound, so that the low viscosity and the good fluidity of the molten state of the slag are ensured;
Al2O3may be used in amounts of 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, etc.; al (Al)2O3The acid oxide can adjust the alkalinity of the slag, obviously reduce the conductivity of the slag, reduce the power consumption and improve the productivity;
CaO may be used in amounts of 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, etc.; CaO can increase the alkalinity of the slag, improve the desulfurization efficiency and reduce the conductivity of the slag;
the amount of MgO can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.; MgO can increase Ti content in slag3O5And Al2O3Activity coefficient of (1), reduction of slagMedium TiO 22Activity coefficient, inhibition of TiO2The function of oxygen supply is transferred, the stability of the crystallizer casting powder is improved, and the fluidity is improved;
TiO2amounts of (d) can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.; TiO 22The titanium alloy can inhibit the burning loss of titanium, is a valence-variable oxide, can transmit oxygen supply to a metal molten pool, is used by being matched with MgO, can inhibit the titanium burning loss, avoid transmission and supply, and improve the stability and the fluidity;
ZrO2amounts of (d) can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.; ZrO (ZrO)2The acid oxide can reduce the conductivity of slag, can inhibit the burning loss of zirconium in the high-temperature alloy containing trace Zr, and the Zr has the function of strengthening crystal boundary; TiO 22And ZrO2The uniformity of smelting metal components can be controlled by matching;
LiF can be used in amounts of 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, etc.; LiF can be used as a fluxing agent, the melting point of the LiF is 850 ℃, and the LiF can be matched with other components within a certain dosage range to reduce the liquidus temperature, viscosity, surface tension and conductivity of the slag.
The invention adds a certain amount of TiO on the basis of quaternary slag system through regulating and controlling the components of the slag system2、ZrO2And LiF, so that the melting point of a slag system is reduced, proper viscosity and surface tension are ensured, the fluidity of molten slag is improved under the condition of ensuring heat input, and the internal and surface metallurgical quality of a smelting ingot is ensured.
In a specific embodiment of the invention, the high-alloying superalloy electroslag remelting slag system comprises the following components in percentage by mass: CaF2 45%~50%、Al2O3 15%~20%、CaO 20%~25%、MgO 3%~5%、TiO2 0.5%~2%、ZrO20.5% -2% and LiF 5% -9%.
In a specific embodiment of the invention, the high-alloying superalloy electroslag remelting slag system comprises the following components in percentage by mass: CaF2 45%~48%、Al2O3 18%~20%、CaO 20%~22%、MgO 3%~4%、TiO2 0.5%~1.5%、ZrO20.5% -1% and LiF 6% -9%.
In the specific implementation mode of the invention, in the high-alloying high-temperature alloy electroslag remelting slag system, the impurity content is less than or equal to 1 percent by mass.
In the specific embodiment of the invention, CaF is in the high-alloying superalloy electroslag remelting slag system2The sum of the mass percent of the LiF and the mass percent of the LiF is 52-56%. Further, in the high-alloying high-temperature alloy electroslag remelting slag system, CaF2The mass ratio of the LiF to the LiF is (5-9): 1, and preferably (6-8): 1.
As in various embodiments, CaF2The sum of the mass percentages with LiF may be 52%, 52.5%, 53%, 53.5%, 54%, 54.5%, 55%, 55.5%, 56%, etc.; CaF2The mass ratios to LiF can be 5: 1, 5.5: 1, 6.5: 1, 7.5: 1, 8.5: 1, 9: 1, etc.
The invention introduces a certain amount of LiF and CaF2And the other components are matched, so that the proper low melting point is ensured, and the quality of the smelted alloy is improved.
In a specific embodiment of the invention, the high-alloying high-temperature alloy electroslag remelting slag is granular, and the granularity is 1-10 mm.
In the specific implementation mode of the invention, the mass percentage content of the strengthening phase of the high-alloying high-temperature alloy is 35-60%, and the initial melting point of the high-alloying high-temperature alloy is 1100-1280 ℃.
As in various embodiments, the high-alloying superalloy may have a strengthening phase content of 35%, 40%, 45%, 50%, 55%, 60%, etc. by mass; the initial melting point of the high-alloying high-temperature alloy can be 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃, 1280 ℃ and the like.
In the embodiment of the invention, the high-alloying high-temperature alloy comprises any one or more of GH4198 alloy, GH4198D alloy, GH4151 alloy, GH4175 alloy and GH4975 alloy, but the invention is not limited thereto, and the rest of high-alloying-degree alloys can also be subjected to electroslag remelting by using the slag system of the invention.
The invention also provides application of any one of the high-alloying high-temperature alloy electroslag remelting slag systems in electroslag remelting continuous directional solidification ingot casting smelting.
In a specific embodiment of the invention, the method for smelting the electroslag remelting continuous directional solidification ingot is ingot drawing type electroslag remelting continuous directional solidification smelting. Further, the speed of the ingot is 2-5 mm/min.
As in various embodiments, the speed of the withdrawal may be 2mm/min, 2.5mm/min, 3mm/min, 3.5mm/min, 4mm/min, 4.5mm/min, 5mm/min, and the like.
For high-alloying high-temperature alloy materials, the strengthening phase of the material is more than 50%, the smelting stress is very large, the cast ingot is easy to crack, and the internal stress can be properly reduced and the cracking can be reduced under the condition of adopting slow smelting; however, in the case of slow smelting, the heat input is reduced, which in turn affects the fluidity, affects the mass transfer between slag and gold, and reduces the surface and internal quality of the smelted ingot; therefore, the existing slag system can not meet the requirement of electroslag remelting continuous directional solidification smelting of low-melting point and high-temperature alloy with high strengthening phase content. The invention ensures the input of smelting heat, improves the fluidity of slag, improves the stability of the smelting process, improves the surface and internal quality of the smelting cast ingot and the like under the condition of slow smelting by regulating and controlling the components of the slag system.
Taking GH4198 alloy as an example, when electroslag remelting continuous directional solidification smelting is adopted to obtain a corresponding GH4198 alloy directional solidification cast ingot, the average eta phase size among dendrites is less than or equal to 22 mu m, such as 20-22 mu m; for GH4198 alloy cast ingots with the diameter of 270mm, the depth of a molten pool is less than or equal to 122mm, such as 120-120 mm, the depth of a slag runner is less than or equal to 3mm, the surface is smooth, and no crack is generated.
In a specific embodiment of the invention, the electrode rod adopted in the smelting of the electroslag remelting continuous directional solidification ingot is obtained by vacuum induction melting and casting.
In practical operation, the melting can be performed by using a conventional electroslag remelting continuous directional solidification device with a stripping device, for example, the melting can be performed by using a vacuum/gas shielded electroslag remelting continuous directional solidification device and method disclosed in the publication number CN 102021348A.
Example 1
The embodiment provides a high-alloying superalloy electroslag remelting slag system which comprises the following components in percentage by mass:
CaF2 48%、Al2O3 19%、CaO 21%、MgO 3.5%、TiO2 1%、ZrO20.5%, and LiF 6%, the balance being unavoidable impurities.
The preparation of the slag system comprises the following steps: mixing the materials according to the proportion to prepare the granular slag system with the granularity of 1-10 mm.
The embodiment also provides a method for smelting GH4198 alloy cast ingot by adopting the slag system through electroslag remelting continuous directional solidification, which adopts a device disclosed in the publication number CN102021348A and comprises the following steps:
baking the slag system in a conventional slag material baking furnace, melting the baked slag system in a slagging furnace, pouring the melted slag system into a crystallizer with the diameter of phi 274mm, inserting a GH4198 electrode rod obtained by conventional vacuum induction melting and casting into the slag to perform electroslag remelting continuous directional solidification to smelt a GH4198 alloy ingot with the diameter of phi 270mm, wherein the ingot drawing speed is 3mm/min, the current is 2500-4000A (such as 3000A), and the voltage is 40-45V (such as 45V).
The GH4198 alloy comprises the following main components: 0.01-0.03 wt% of C, 12-14 wt% of Cr, 19.5-21.5 wt% of Co, 2.1-2.5 wt% of W, 3.6-4 wt% of Mo, 3-3.6 wt% of Al, 3.5-3.9 wt% of Ti, 2.3-2.7 wt% of Ta, 0.03-0.07 wt% of Zr, 0.01-0.02 wt% of B and the balance of Ni.
Example 2
The embodiment provides a high-alloying superalloy electroslag remelting slag system which comprises the following components in percentage by mass:
CaF2 45%、Al2O3 20%、CaO 20%、MgO 3.5%、TiO2 1%、ZrO21%, and LiF 9%, the balance being unavoidable impurities.
The embodiment also provides a method for smelting GH4198 alloy ingot by adopting the slag system through electroslag remelting continuous directional solidification, and the difference is only that in reference to the embodiment 1: different in slag system, the slag system of the embodiment is adopted to carry out electroslag remelting continuous directional solidification smelting on GH4198 alloy cast ingots.
Example 3
The embodiment provides a high-alloying superalloy electroslag remelting slag system which comprises the following components in percentage by mass:
CaF2 50%、Al2O3 19%、CaO 20%、MgO 3.5%、TiO2 1%、ZrO21%, and LiF 5%, the balance being unavoidable impurities.
The embodiment also provides a method for smelting GH4198 alloy ingot by adopting the slag system through electroslag remelting continuous directional solidification, and the difference is only that in reference to the embodiment 1: different in slag system, the slag system of the embodiment is adopted to carry out electroslag remelting continuous directional solidification smelting on GH4198 alloy cast ingots.
Comparative example 1
Comparative example 1 provides an electroslag remelting slag system comprising, in mass percent:
CaF2 55%、Al2O321 percent of CaO, 20 percent of CaO, 3.5 percent of MgO, and the balance of unavoidable impurities.
Comparative example 1 also provides a method for smelting a GH4198 alloy ingot by continuous directional solidification through electroslag remelting by using the slag system, and the difference is that in reference example 1: the slag systems are different, and the slag system of the comparative example is adopted to carry out electroslag remelting continuous directional solidification smelting on GH4198 alloy cast ingots.
Comparative example 2
Comparative example 2 provides an electroslag remelting slag system comprising the following components in percentage by mass:
CaF2 52%、Al2O3 20%、CaO 19%、MgO 3.5%、TiO2 1%、ZrO21%, and LiF 3%, the balance being unavoidable impurities.
Comparative example 2 also provides a method for smelting a GH4198 alloy ingot by electroslag remelting continuous directional solidification by using the slag system, and the difference is that in reference example 1: the slag systems are different, and the slag system of the comparative example is adopted to carry out electroslag remelting continuous directional solidification smelting on GH4198 alloy cast ingots.
Comparative example 3
Comparative example 3 provides an electroslag remelting slag system comprising the following components in percentage by mass:
CaF2 48%、Al2O3 18%、CaO 18%、MgO 3.5%、TiO2 1%、ZrO21%, and LiF 12%, the balance being unavoidable impurities.
Comparative example 3 also provides a method for smelting a GH4198 alloy ingot by continuous directional solidification through electroslag remelting by using the slag system, and the difference is that in reference example 1: the slag systems are different, and the slag system of the comparative example is adopted to carry out electroslag remelting continuous directional solidification smelting on GH4198 alloy cast ingots.
Experimental example 1
In order to comparatively illustrate the influence of different slag systems on the quality of the obtained ingots when the alloy ingots are subjected to electroslag remelting and continuous directional solidification smelting, samples are respectively taken from the upper parts of the ingots obtained in different examples and comparative examples, and the statistics results are shown in table 1.
TABLE 1 inclusions of directionally solidified ingots of GH4198 alloy obtained in various examples and comparative examples
The comparison shows that the GH4198 alloy directionally solidified cast ingot obtained by smelting the slag system has fewer inclusions, and further shows that the slag system of the invention has better fluidity under the condition of slow smelting, is more beneficial to substance transfer and has better inclusion removal effect.
Referring to FIGS. 1 to 4, the riser and surface quality of the GH4198 alloy directionally solidified ingots obtained in example 1 and comparative example 1 of the present invention are shown. As can be seen from the figure, the situation of a riser and the surface quality of GH4198 alloy directionally solidified ingots obtained by comparing different examples and comparative examples shows that the GH4198 alloy directionally solidified ingots obtained by smelting with the slag system of the invention have flat heads and no cracking, while the ingots obtained with the slag system of the comparative example obviously crack.
The quality of the alloy ingot cast by continuous directional solidification and smelting in electroslag remelting of different slag systems is further characterized, and the specific table is shown in table 2.
TABLE 2 characterization of directionally solidified GH4198 alloy ingots obtained in different examples and comparative examples
| Slag system | Depth of molten pool/mm | Interdendritic average eta-phase size/mum at radius of ingot 1/2 | Cracking condition | Depth of slag groove/mm |
| Example 1 | 120 | 20 | Is not cracked | 3 |
| Example 2 | 122 | 22 | Is not cracked | 2.5 |
| Example 3 | 125 | 23 | Is not cracked | 3 |
| Comparative example 1 | 135 | 29 | Has cracks | 4 |
| Comparative example 2 | 135 | 25 | Has cracks | 3.5 |
| Comparative example 3 | 140 | 30 | Has cracks | 2.5 |
From the above results, it is understood that in the slag system of comparative example 1, LiF was not added, the depth of the slag channel was deep, the surface quality after the ingot casting was smelted was poor, the yield of the material was low, the depth of the molten pool was deep during the smelting process, the size of the inter-dendritic harmful phase η phase reached 29 μm, and the thermal stress was large, and the ingot cracking occurred. The amount of LiF used in comparative example 2 was lower and the slag groove depth was improved compared to comparative example 1, but still the effect was poor. In comparative example 3, the amount of LiF was high, and although the surface quality of the ingot was greatly improved, the depth of the molten pool was large, the size of the interdendritic harmful phase was large, and the ingot was likely to crack.
The slag system can effectively ensure the input of melting heat when the high strengthening phase content and low melting point high temperature alloy is melted by the electroslag remelting continuous directional solidification equipment, improve the fluidity of the slag, improve the stability of the melting process, and reduce the number of ingot casting inclusions obtained by melting without cracking.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The high-alloying high-temperature alloy electroslag remelting slag system is characterized by comprising the following components in percentage by mass:
CaF2 45%~50%、Al2O3 15%~20%、CaO 20%~25%、MgO 3%~5%、TiO2 0.5%~2%、ZrO20.5% -2% and LiF 5% -9%;
CaF2the sum of the mass percent of the LiF and the mass percent of the LiF is 52-56%;
the high-alloying high-temperature alloy comprises 35-60% by mass of a strengthening phase, and the initial melting point of the high-alloying high-temperature alloy is 1100-1280 ℃.
2. The high-alloy superalloy electroslag remelting slag system according to claim 1, wherein in the high-alloy superalloy electroslag remelting slag system, CaF2The mass ratio of the LiF to the LiF is (5-9): 1.
3. The high-alloy high-temperature alloy electroslag remelting slag system according to claim 1, wherein the high-alloy high-temperature alloy electroslag remelting slag system is granular, and the granularity is 1-10 mm.
4. The high alloying superalloy electroslag remelting slag system of claim 1, wherein the high alloying superalloy comprises any one of a GH4198 alloy, a GH4198D alloy, a GH4151 alloy, a GH4175 alloy, and a GH4975 alloy.
5. Use of the high alloyed superalloy slag of any of claims 1 to 4 in electroslag remelting continuous directional solidification ingot smelting.
6. The application of claim 5, wherein the method for smelting the electroslag remelting continuous directional solidification ingot is ingot drawing type electroslag remelting continuous directional solidification smelting.
7. Use according to claim 6, wherein the speed of the withdrawal is 2 to 5 mm/min.
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