CN112030020A - Method for smelting high-tungsten high-cobalt-nickel alloy through electroslag remelting, high-tungsten high-cobalt-nickel alloy and shaped charge liner - Google Patents

Abstract

The invention provides a method for electroslag remelting and smelting a high-tungsten, high-cobalt-nickel alloy, a high-tungsten, high-cobalt-nickel alloy and a medicine type cover. The method for smelting high-tungsten and high-cobalt-nickel alloy by electroslag remelting comprises: slagizing raw materials of electroslag remelting slag system, and then smelting electrode ingots made of the raw materials of the high-tungsten and high-cobalt-nickel alloy to obtain the High tungsten and high cobalt nickel alloy; the electroslag remelting slag system, the raw materials of which are calculated by mass percentage, including: 39%-44%CaF ₂ , 24%-28%CaO, 14%-18%Al ₂ O ₃ , 3%-5%MgO and 5%-10%SiO ₂ . The high-tungsten, high-cobalt-nickel alloy is prepared by using the method for electroslag remelting and smelting the high-tungsten, high-cobalt-nickel alloy. The medicine type cover, the raw material of which includes the high-tungsten high-cobalt-nickel alloy. The electroslag remelting slag system provided by the present application can effectively reduce the sulfur content of the alloy, improve the purity of the alloy, and obtain a high-plastic alloy with good surface quality.

Description

Method for electroslag remelting smelting high tungsten high cobalt nickel alloy, high tungsten high cobalt nickel alloy and medicine type cover

technical field

The invention relates to the field of metallurgy, in particular to a method for electroslag remelting and smelting a high-tungsten and high-cobalt-nickel alloy, a high-tungsten and high-cobalt-nickel alloy and a medicine-type cover.

Background technique

The amount of alloy impurities will have a significant impact on the properties of the alloy. At present, the oxygen element in the alloy is controlled by adding a deoxidizer and using a composite deoxidizing process during the alloy smelting process. In the smelting process, smelting equipment (crucible, chute, ingot mold, etc.) and deoxidation process inevitably introduce oxygen, sulfur and other impurity elements, and vacuum induction melting and vacuum consumable melting are not ideal for the removal of inclusions. The current smelting process only relies on the purification of raw materials to control the sulfur content in the alloy, which cannot meet the requirements of the alloy for the content of impurity elements.

Electroslag remelting is widely used in the smelting of nickel-based alloys, superalloys, and special steels. Practice has proved that electroslag remelting can remove impurity elements in alloys to a certain extent. The key factor affecting the refining effect of electroslag remelting is the choice of smelting slag system. Different alloys generally use slag systems with different components and ratios to adapt to the special properties of different alloys and achieve specific refining purposes. High-tungsten and high-cobalt-nickel alloys have material properties of high melting point (1490°C-1510°C) and smelting requirements of low sulfur and low inclusions, while electroslag remelting slag systems and smelting methods for high-tungsten and high-cobalt-nickel alloys have not yet been seen. report.

In view of this, this application is hereby made.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for electroslag remelting and smelting high-tungsten and high-cobalt-nickel alloy, high-tungsten and high-cobalt-nickel alloy and medicine-type cover to solve the above problems.

To achieve the above purpose, the present invention adopts the following technical solutions:

A method for electroslag remelting and smelting high tungsten and high cobalt nickel alloy, comprising:

The electroslag remelting slag system is subjected to slagization, and then the electrode ingot made from the raw material of the high-tungsten high-cobalt-nickel alloy is smelted to obtain the high-tungsten high-cobalt-nickel alloy; the electroslag remelting slag system, The raw materials are calculated by mass percentage, including: 39%-44% CaF ₂ , 24%-28% CaO, 14%-18% Al ₂ O ₃ , 3%-5% MgO and 5%-10% SiO ₂ ; The melting point of the electroslag remelting slag system is 1350-1410°C.

It should be noted that the high-tungsten and high-cobalt-nickel alloy referred to in this application has a high tungsten content of 25-45wt%, a high cobalt content of 15-30wt%, the balance of nickel and inevitable residual elements. Electroslag remelting is a method of smelting using the resistance heat generated when an electric current passes through the molten slag as a heat source.

The electroslag remelting slag system provided by the present application has high basicity and strong desulfurization ability, can effectively reduce impurities in the alloy, has high temperature plasticity, and can ensure that the alloy surface has good quality and no defects such as slag grooves.

The slag-based desulfurization mechanism is shown in the following two formulas:

It should be noted that S in the alloy raw material exists in various valence states, and becomes divalent sulfur combined with calcium and magnesium ions under the action of the slag system, and then removed.

Optionally, in the raw material of the electroslag remelting slag system, calculated by mass percentage, CaF ₂ can be between 39%, 40%, 41%, 42%, 43%, 44% and 39%-44% Any value of ; CaO can be 24%, 25%, 26%, 27%, 28% and any value between 24%-28%; Al ₂ O ₃ can be 14%, 15%, 16%, 17%, 18% and any value between 14%-18%; MgO can be any value between 3%, 4%, 5% and 3%-5%; SiO ₂ can be 5%, 6% %, 7%, 8%, 9%, 10% and any value between 5%-10%; the melting point of the electroslag remelting slag system can be 1350°C, 1360°C, 1370°C, 1380°C, Any value between 1390°C, 1400°C, 1410°C, and 1350-1410°C.

Preferably, the electroslag remelting slag system, the raw materials of which are calculated by mass percentage, include: 40%-41% CaF ₂ , 26%-28% CaO, 14%-16% Al ₂ O ₃ , 3%-5 %MgO and 7%-9% _SiO2 .

Preferably, before the slagging, it also includes:

Melting the raw materials of the electroslag remelting slag system to obtain pre-melted slag, then pulverizing and screening the pre-melted slag to obtain slag particles, and then heating to obtain slag;

Preferably, the particle size of the slag particles is 3-15mm;

Preferably, the heating temperature is 480-520°C, and the time is 4-8h;

Preferably, the heating is performed by baking;

After the slag particles are heated to obtain the slag, they are kept at 180-220° C. for later use.

The purpose of melting, pulverizing and heating the slag-based raw materials is, on the one hand, to mix the components sufficiently and evenly, and on the other hand, to prevent the slag from absorbing water and causing the alloy to increase hydrogen.

Optionally, the particle size of the slag particles can be any value between 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm and 3-15mm; The heating temperature can be any value between 480°C, 490°C, 500°C, 510°C, 520°C and 480-520°C, and the time can be between 4h, 5h, 6h, 7h, 8h and 4-8h Any value of ; the temperature of the slag insulation can be any value between 180°C, 190°C, 200°C, 210°C, 220°C, and 180-220°C.

Preferably, the amount of the electroslag remelting slag system is 3.5-4.5% of the mass of the electrode ingot.

The optimization of the amount of electroslag remelting slag system helps to improve the melting efficiency and alloy properties, and can also effectively control the cost.

Optionally, the amount of the electroslag remelting slag system can be 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, 4.0%, 4.1%, 4.2%, 4.3%, 4.4%, 4.5%, and any value between 3.5-4.5%.

Preferably, the slag is in the form of arc-starting slag, and the electroslag remelting slag system with a particle size of less than or equal to 5 mm is used as the arc-starting agent;

Preferably, the slag uses part of the raw materials of the electroslag remelting slag system in the arc starting stage, and then adds the remaining raw materials of the electroslag remelting slag system in multiple times;

Preferably, the voltage of the slag is 45-50V, the current is 5.5-7.0KA, and the time is 30-40min;

Preferably, after the slagging is completed, the voltage is adjusted to 42-46V, and the current is adjusted to 5.0-6.5 KA.

Preferably, the melting rate of the smelting is 2.5-3.5kg/min;

Preferably, the smelting is carried out by adopting a slag resistance swinging method and a constant melting rate;

Preferably, when the remaining total mass of the electrode ingot is 8%-12%, the melting rate is reduced to 2.0-2.5 kg/min and maintained until the end of melting.

The method of arcing the slag and adding the slag material in steps can ensure the effect of the slag.

Different melting rates, currents and voltages are used in different smelting stages, which can ensure that the ingot has no defects such as shrinkage cavities and segregation.

Optionally, the voltage of the slag can be any value between 45V, 46V, 47V, 48V, 49V, 50V and 45-50V, and the current can be 5.5KA, 6.0KA, 6.5KA, 7.0KA and 5.5 Any value between -7.0KA, time can be any value between 30min, 35min, 40min and 30-40min; after the slag removal is completed, the voltage can be adjusted to 42V, 43V, 44V, 45V, 46V and any value between 42-46V, the current is adjusted to any value between 5.0KA, 5.5KA, 6.0KA, 6.5KA and 5.0-6.5KA; the melting rate of the smelting can be 2.5kg/min, 2.6kg/min, 2.7kg/min, 2.8kg/min, 2.9kg/min, 3.0kg/min, 3.1kg/min, 3.2kg/min, 3.3kg/min, 3.4kg/min, 3.5kg/min and Any value between 2.5-3.5kg/min; when the remaining total mass of the electrode ingot is 8%-12%, the melting rate is reduced to 2.0kg/min, 2.1kg/min, 2.2kg/min, 2.3kg /min, 2.4kg/min, 2.5kg/min and any value between 2.0-2.5kg/min and hold until the end of smelting.

Preferably, the electrode ingot is obtained by vacuum induction melting the raw material of the high-tungsten high-cobalt-nickel alloy;

Preferably, in the process of vacuum induction melting, deoxidizer is used for deoxidation;

Preferably, the deoxidizer includes a carbon deoxidizer and/or an aluminum deoxidizer.

Preferably, the slagging is carried out under an inert gas atmosphere;

Preferably, the inert gas includes noble gas;

Preferably, the inert gas includes argon.

Remelting in a protective atmosphere can prevent the alloy ingot from increasing oxygen.

A high-tungsten, high-cobalt-nickel alloy is prepared by using the method for electroslag remelting and smelting high-tungsten and high-cobalt-nickel alloy.

A medicine-type cover, the raw material of which includes the high-tungsten high-cobalt-nickel alloy.

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

In the electroslag remelting method for smelting high-tungsten and high-cobalt-nickel alloys provided in this application, the appropriate electrical conductivity and melting point (lower than the melting point of the smelting alloy) are obtained by selecting the types and amounts of components of the electroslag remelting slag system. 100-150℃), reduce power consumption and facilitate the formation of slag skin; through calcium oxide and magnesium oxide, the basicity of the slag system is improved, the desulfurization ability of the slag system is improved, and the sulfur content of the alloy is effectively reduced, thereby improving the alloy. The addition of silica increases the high-temperature plasticity of the slag system, and can obtain alloy ingots with good surface quality. The deformation performance of the slag system and the oxide inclusions is 35.8°-40.2°, that is, the inclusions are compatible with the slag, and the slag can effectively dissolve and adsorb the existing non-metallic inclusions in the alloy. The removal effect of inclusions is particularly obvious, and the purity of the alloy is improved; in addition, compared with the high-tungsten high-cobalt-nickel alloy, the slag system provided by this application has the viscosity and surface properties that match the alloy smelting, and the slag system has a certain high temperature. Plasticity can ensure that the surface quality of the ingot is good, and there are no defects such as slag grooves. The electroslag remelting method for smelting high-tungsten and high-cobalt-nickel alloys provided by the present application is simple to operate, and the obtained high-tungsten and high-cobalt-nickel alloys have good surface quality, less impurities, no shrinkage cavities and other defects, good processing plasticity, and the sulfur of the alloy is good. Content≤20pmm, inclusion content≤10mg/10kg.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be considered as limiting the scope of the invention.

FIG. 1 is a schematic diagram of the morphology of inclusions under the electron scanning microscope of the electrode ingot obtained in Example 2. FIG.

Detailed ways

Terms as used herein:

"Prepared by" is synonymous with "comprising". As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or device comprising the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such composition, step, method, article or device elements.

The conjunction "consisting of" excludes any unspecified element, step or component. If used in a claim, this phrase would make the claim closed to the exclusion of materials other than those described, but with the exception of conventional impurities associated therewith. When the phrase "consisting of" appears in a clause in the body of a claim rather than immediately following the subject matter, it is limited only to the elements described in that clause; other elements are not excluded from the description as a whole beyond the claims.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or a range bounded by a series of upper preferred values and lower preferred values, this should be understood as specifically disclosing any upper range limit or preferred value and any lower range limit or all ranges formed by any pairing of preferred values, whether or not the ranges are individually disclosed. For example, when a range "1-5" is disclosed, the described range should be construed to include the ranges "1-4", "1-3", "1-2", "1-2 and 4-5" , "1 to 3 and 5", etc. When numerical ranges are described herein, unless stated otherwise, the ranges are intended to include the endpoints and all integers and fractions within the range.

In these examples, unless otherwise indicated, the stated parts and percentages are by mass.

"Mass part" refers to a basic measurement unit that represents the mass ratio relationship of multiple components, and 1 part can represent any unit mass, such as 1 g, 2.689 g, and the like. If we say that the mass part of the A component is a part, and the mass part of the B component is b part, it means the ratio of the mass of the A component to the mass of the B component a:b. Alternatively, the mass of the A component is aK, and the mass of the B component is bK (K is an arbitrary number, representing a multiple factor). Unmistakably, unlike parts by mass, the sum of parts by mass of all components is not limited to 100 parts by mass.

"And/or" is used to indicate that one or both of the stated circumstances may occur, eg, A and/or B includes (A and B) and (A or B).

The embodiments of the present invention will be described in detail below in conjunction with specific examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be regarded as limiting the 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.

Example 1

This embodiment provides an electroslag remelting slag system, calculated in mass percentage, including: 43% CaF ₂ , 28% CaO, 16% Al ₂ O ₃ , 5% MgO and 8% SiO ₂ . The melting point of this electroslag remelting slag system was 1370°C.

The slag-based raw materials are heated and melted in an electric arc furnace, cast and cooled to room temperature, and then pulverized by a crusher, and the particles with a particle size of 3-15mm are screened out and mechanically mixed again. The mixed pre-melted slag was placed in a baking furnace, baked at 500°C for 6 hours to obtain slag, and kept at 200°C for use.

Electrode ingots are prepared by vacuum induction melting (C+Al deoxidation). After cutting the riser, polishing, cleaning and baking, the ingot head and ingot tail are respectively cut off 20mm thick slices, and the electrode ingot can be used; the alloy is detected by a sulfur analyzer. Medium sulfur content, inclusion content was detected by electrolysis of large samples, inclusion size was measured by electron scanning microscope, and tensile properties were tested. The test results are shown in Table 1.

The above slag material is taken according to 35-45% of the mass of the electrode ingot. After adding slag, centering, and argon filling, the solid fine slag with a particle size of ≤5mm is used as the arc-starting agent to start the arc. 6KA. After 35 minutes, when the slag is completely melted, reduce the voltage to 43V, the current is 5.6KA, the melting rate is set to 3.2kg/min, and the melting is stable. When the remaining 40kg of the electrode ingot, reduce the melting rate to 2.0kg/min. After the thermal capping is completed, the furnace is cooled for 10h, and the ingot is removed from the mold. The surface quality of the ingot is good, and there are no defects such as slag grooves.

Table 1 Test results of Example 1

Example 2

This embodiment provides an electroslag remelting slag system, calculated in mass percentage, including: 44% CaF ₂ , 25% CaO, 18% Al ₂ O ₃ , 3% MgO and 10% SiO ₂ . The melting point of this electroslag remelting slag system was 1360°C.

The slag-based raw materials are heated and melted in an electric arc furnace, cast and cooled to room temperature, and then pulverized by a crusher, and the particles with a particle size of 3-15mm are screened out and mechanically mixed again. The mixed pre-melted slag was placed in a baking furnace, baked at 480°C for 8 hours to obtain slag, and kept at 180°C for use.

Electrode ingots are prepared by vacuum induction melting (Al deoxidation). After cutting risers, polishing, cleaning and baking, the ingot head and ingot tail thick slices are cut off respectively, and electrode ingots can be used. The sulfur content in the alloy is detected by a sulfur analyzer. , the inclusion content was detected by electrolysis of large samples, the size of inclusions was measured by electron scanning microscope (Fig. 1 shows the morphology of inclusions under the electron scanning microscope), and tensile properties were tested.

According to 45% of the mass of the electrode ingot, the above-mentioned slag is taken. After adding slag, centering, and argon filling, the solid fine slag with a particle size of ≤5mm is used as the arc-starting agent, and the slag-forming voltage is set to 47V and the current to 5.8KA . After 40 minutes, when the slag is completely melted, reduce the voltage to 42V, the current is 5.0KA, the melting rate is set to 2.5kg/min, and the melting is stable. When the remaining 32kg of the electrode ingot, reduce the melting rate to 2.2kg/min. After the thermal capping is completed, the furnace is cooled for 10h, and the ingot is removed from the mold. The surface quality of the ingot is good, and there are no defects such as slag grooves.

Table 2 The test results of Example 2

Example 3

This embodiment provides an electroslag remelting slag system, calculated in mass percentage, including: 43% CaF ₂ , 27% CaO, 17% Al ₂ O ₃ , 4.5% MgO and 8.5% SiO ₂ . The melting point of this electroslag remelting slag system was 1400°C. Industrial fluorite (CaF ₂ > 98%), lime (CaO > 94%), alumina powder (Al ₂ O ₃ > 97%), magnesia (MgO > 97%) and silica (SiO ₂ > 98%) can be used %) as the raw material.

The slag-based raw materials are heated and melted in an electric arc furnace, cast and cooled to room temperature, and then pulverized by a crusher, and the particles with a particle size of 3-15mm are screened out and mechanically mixed again. The mixed pre-melted slag was placed in a baking furnace, baked at 520°C for 4 hours to obtain slag, and kept at 220°C for use.

Electrode ingots are prepared by vacuum induction melting (Al deoxidation). After cutting risers, polishing, cleaning and baking, the ingot head and ingot tail thick slices are cut off respectively, and electrode ingots can be used. The sulfur content in the alloy is detected by a sulfur analyzer. , The inclusion content of the large sample was detected by electrolysis, the size of the inclusions was measured by an electron scanning microscope, and the tensile properties were tested. The test results are shown in Table 3.

According to 40% of the mass of the electrode ingot, take the above slag material, after adding slag, centering, and argon filling, use solid fine slag with a particle size of ≤ 5mm as the arc starting agent, set the slag slag voltage to 50V, and the current to 7.0KA . After 30 minutes, when the slag is completely melted, reduce the voltage to 46V, the current is 6.5KA, the melting rate is set to 3.5kg/min, and the melting is stable. When the remaining 48kg of the electrode ingot, reduce the melting rate to 2.5kg/min. After the thermal capping is completed, the furnace is cooled for 10h, and the ingot is removed from the mold. The surface quality of the ingot is good, and there are no defects such as slag grooves.

Table 3 Embodiment 3 detection results

Comparative Example 1

The difference from Example 1 is that the commonly used ternary slag system is selected, calculated in mass percentage, including: 70% CaF ₂ , 15% CaO, and 15% Al ₂ O ₃ .

Comparative Example 2

The difference from Example 1 is that the selected slag system reduces the proportion of CaO and increases the proportion of Al ₂ O ₃ , calculated in mass percentage, including: 43% CaF ₂ , 19% CaO, 25% Al ₂ O ₃ , 5% MgO and 8% SiO ₂ .

Comparative Example 3

Different from Example 3, when the slag was completely melted and the melting period was stabilized, the voltage was reduced to 48V, the current was 7.0KA, and the melting rate was set to 4.1kg/min.

Comparative Example 4

Different from Example 3, when the electrode ingot remained 48kg, the melting rate was still 3.5kg/min until the end.

The detection and analysis of electrode ingots and electroslag ingots in Comparative Examples 1-4 are shown in Table 4:

Table 4 Test results of comparative examples 1-4

It can be seen from Tables 1 to 4 that the use of the electroslag remelting slag system and electroslag remelting smelting method of the present application to smelt high tungsten and high cobalt nickel alloys can effectively reduce the sulfur content and inclusion content in the alloy, and significantly reduce the The maximum size of inclusions in the alloy improves the ductility of the alloy and makes it meet the material performance conditions for the preparation of the drug-type cover. In contrast, using traditional ternary slag system or reducing the CaO content in the slag system and increasing the Al ₂ O ₃ content or increasing the melting rate to 4.1kg/min in the stable smelting stage or not reducing the melting rate control in the heat capping stage will all lead to the desulfurization of the alloy. The reduction of the inclusion efficiency and the weakening of the removal effect of large-sized inclusions seriously affect the improvement of the ductility of the alloy by remelting.

The electroslag remelting slag system provided by the present application realizes stable electroslag remelting and melting of high-tungsten and high-cobalt-nickel alloys; by increasing the basicity of the slag system, the sulfur content of the alloy is effectively reduced, thereby improving the processing and shaping of the alloy; effectively The removal of inclusions in the alloy is particularly effective for the removal of large-sized inclusions, which improves the purity of the ingot; the slag system has a certain high temperature plasticity, which can ensure good surface quality of the ingot and no defects such as slag grooves; process The optimization ensures that the ingot is free from defects such as shrinkage cavities and segregation. 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.

Furthermore, it will be understood by those skilled in the art that although some of the embodiments herein include certain features, but not others, included in other embodiments, that combinations of features of the different embodiments are intended to be within the scope of the present invention And form different embodiments. For example, in the above claims, any of the claimed embodiments may be used in any combination. The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims (10)

1. The method for smelting the high-tungsten high-cobalt nickel alloy through electroslag remelting is characterized by comprising the following steps of:

melting the raw material of the electroslag remelting slag system, and then smelting an electrode ingot made of the raw material of the high-tungsten high-cobalt nickel alloy to obtain the high-tungsten high-cobalt nickel alloy;

the electroslag remelting slag system comprises the following raw materials in percentage by mass: 39% -44% of CaF₂、24%-28%CaO、14%-18%Al₂O₃3 to 5 percent of MgO and 5 to 10 percent of SiO₂(ii) a The melting point of the electroslag remelting slag system is 1350-1410 ℃.

2. The method according to claim 1, wherein the electroslag remelting slag system comprises the following raw materials in percentage by mass: 40% -41% of CaF₂、26%-28%CaO、14%-16%Al₂O₃3 to 5 percent of MgO and 7 to 9 percent of SiO₂。

3. The method according to claim 1, wherein the slagging further comprises, prior to:

melting the raw materials of the electroslag remelting slag system to obtain pre-melted slag, crushing and screening the pre-melted slag to obtain slag particles, and heating the slag particles to obtain slag; the granularity of the slag charge particles is 3-15 mm; the heating temperature is 480-520 ℃, and the time is 4-8 h; the heating is carried out in a baking mode; and heating the slag particles to obtain the slag, and then preserving the heat at the temperature of 180-220 ℃ for later use.

4. The method of claim 1, wherein the electroslag remelting slag system is used in an amount of 3.5-4.5% of the mass of the electrode ingot.

5. The method according to claim 1, characterized in that the slagging is carried out by adopting an arc-starting slagging mode, and the electroslag remelting slag system with the granularity of less than or equal to 5mm is used as an arc-starting agent; in the slagging stage, partial raw materials of the electroslag remelting slag system are used, and then the rest raw materials of the electroslag remelting slag system are added for multiple times; the voltage of the slagging is 45-50V, the current is 5.5-7.0KA, and the time is 30-40 min; after the slagging is finished, the voltage is adjusted to 42-46V, and the current is adjusted to 5.0-6.5 KA.

6. The method of claim 1, wherein the melting rate of the melting is 2.5-3.5 kg/min; smelting at a constant smelting speed in a slag resistance swinging mode; when the residual total mass of the electrode ingot is 8-12%, reducing the melting speed to 2.0-2.5kg/min and keeping the melting speed till the end of melting.

7. The method according to claim 1, wherein the electrode ingot is obtained by vacuum induction melting of the raw material of the high-tungsten high-cobalt nickel alloy; in the vacuum induction melting process, deoxidizing agent is used for deoxidizing; the deoxidizer comprises a carbon deoxidizer and/or an aluminum deoxidizer.

8. The method according to any one of claims 1 to 7, wherein the slagging is carried out in an inert gas atmosphere; the inert gas comprises a noble gas; the noble gas comprises argon.

9. A high-tungsten high-cobalt nickel alloy, which is prepared by using the method for smelting the high-tungsten high-cobalt nickel alloy by electroslag remelting according to any one of claims 1 to 8.

10. A liner comprising the high tungsten high cobalt nickel alloy of claim 9 as a starting material.

Images