CN108385135B - Method for preparing high-tungsten alloy base band billet for coated conductor through electrochemical deposition - Google Patents
Method for preparing high-tungsten alloy base band billet for coated conductor through electrochemical deposition Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910001080 W alloy Inorganic materials 0.000 title claims abstract description 22
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 15
- 239000004020 conductor Substances 0.000 title claims abstract description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 39
- 239000000956 alloy Substances 0.000 claims abstract description 39
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 64
- 238000010438 heat treatment Methods 0.000 claims description 54
- 238000001953 recrystallisation Methods 0.000 claims description 22
- 238000005097 cold rolling Methods 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 13
- 238000000151 deposition Methods 0.000 claims description 10
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 10
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 9
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 9
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 9
- 230000008021 deposition Effects 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- 229910020350 Na2WO4 Inorganic materials 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 claims description 5
- 239000001509 sodium citrate Substances 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000005482 strain hardening Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000006104 solid solution Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/24—Alloys obtained by cathodic reduction of all their ions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for preparing a high-tungsten alloy base band billet for a coated conductor by electrochemical deposition, belonging to the field of high-temperature superconducting materials. The NiW alloy base band used as the second generation high temperature superconducting material coating conductor substrate has multiple functions of epitaxial texture, stress strain bearing and the like. However, the grain size is difficult to further reduce due to the self limitation of the traditional process, so that the preparation process of the billet is changed, the initial billet with the nano grain size is prepared by adopting an electrochemical deposition method, the deformation uniformity and the cubic texture forming capability of the high-tungsten alloy base band are greatly improved, and the application of the high-tungsten alloy base band in a second-generation high-temperature superconducting material coating conductor is further promoted. The method effectively controls the grain size of the NiW alloy billet to be 30-80 nm.
Description
Technical Field
The present invention belongs to the field of high-temperature superconducting material.
Background
The NiW alloy base band used as the second generation high temperature superconducting material coating conductor substrate has multiple functions of epitaxial texture, stress strain bearing and the like. At present, the Ni-5 at.% W (Ni5W) alloy baseband is industrialized, but the mechanical strength is low, and hysteresis loss is generated under the application environment of an alternating current field in a liquid nitrogen temperature region, which limits the further application development. In order to improve the mechanical strength of the base band and reduce the magnetic performance, the W content in the alloy is increased. When the atomic percentage of W is more than or equal to 8, the NiW alloy baseband has higher mechanical strength and lower saturation magnetization, so that the NiW alloy baseband becomes an excellent choice for application. However, with the increase of the percentage content of W atoms, solid solution atoms form a large amount of dislocation pinning in crystal boundary crystal, the yield strength of the base band rapidly rises, and simultaneously, the deformation mode of the crystal is gradually developed from dislocation sliding to twinning and shearing, so that the deformation texture deviates from the copper texture, and the forming capability of the cubic texture in the recrystallization process is greatly reduced. Therefore, how to obtain a strong cubic texture in the high tungsten alloy baseband constitutes a hotspot and difficulty for the research of the NiW alloy baseband.
At present, the research on the high-tungsten alloy baseband mainly focuses on three major parts, namely a billet structure, a deformation process and a recrystallization heat treatment process. Wherein the billet structure represents the initial state of the subsequent large-deformation cold rolling and recrystallization process. The traditional billet preparation mainly comprises smelting and powder metallurgy, but the traditional billet preparation does not greatly help to improve the texture of the high-tungsten alloy base band, particularly when the atomic percentage of W exceeds 8%, the cold-rolled base band forms a brass texture in the rolling process due to the reduction of stacking fault energy, and the NiW alloy base band is difficult to form a strong cubic texture in the subsequent annealing heat treatment. In addition, Bhattacharjee P (Metallurgical and Materials transformations A,2012,42(9):2769-2780) and the like in 2012 studied the influence of the grain size of the initial ingot on the formation of the pure nickel base band recrystallization cubic texture, the initial ingot with fine grains is obtained by large deformation amount cold rolling to form a typical deformation band structure parallel to the RD direction, while the initial ingot with coarser grains is easily subjected to large deformation amount cold rolling to generate a large amount of shear bands, and random orientation nucleation occurs in the shear band area; kingjinhua et al, Beijing university of industry, 2014, found that both the Copper and S orientation contents on the surface of a Ni9.3W substrate after rolling a fine-grain billet were higher than those on a substrate rolled from a coarse-grain billet (rare metal materials and engineering, 2014,43 (8): 2027-.
The content of the cubic texture can be improved to a certain extent by optimizing the traditional billet preparation process to improve the billet structure, and particularly, the formation of the cubic texture is greatly facilitated by refining the grain size of the billet through various methods. In the aspect of refining the grain size of the billet, a German Dresden laboratory adopts a smelting method to prepare Ni9.3W and Ni9.5W alloy base bands, and the billet is subjected to four steps of hot forging, hot rolling, homogenization heat treatment and initial recrystallization heat treatment to obtain an alloy billet with the average grain size of about 30 mu m; in 2008, Zhao leap adopts discharge plasma sintering to prepare a Ni9.3W alloy base band, and the fact that a billet of the high-tungsten alloy base band prepared by a powder metallurgy method has obvious advantages in grain size is discovered. However, the grain size is difficult to further reduce due to the self limitation of the traditional process, so that the preparation process of the billet is changed, the initial billet with the nano grain size is prepared by adopting an electrochemical deposition method, the deformation uniformity and the cubic texture forming capability of the high-tungsten alloy base band are greatly improved, and the application of the high-tungsten alloy base band in a second-generation high-temperature superconducting material coating conductor is further promoted.
Disclosure of Invention
The invention aims to provide a method for preparing a high-tungsten alloy base band billet for a coated conductor by an electrochemical deposition method, which effectively controls the grain size of a NiW alloy billet within 30-80 nm.
A method for preparing a high-tungsten-nickel-base alloy base band billet for a coated conductor by an electrochemical deposition method is characterized by comprising the following steps:
(1) electrochemical deposition
Sodium tungstate and nickel sulfate are used as main salts to respectively prepare NiSO4·6H2The O content is 0.06,0.08,0.14mol L-1，Na2WO4·2H2The O content was 0.14mol L-1，Na3C6H5O7·2H2The O content was 0.50mol L-1，NH4Cl content of 0.50mol L-1With a NaBr content of 0.15mol L-1The mixed solution of (1). Adjusting the pH of the solution to 8.5 by using ammonia water at room temperature, wherein the deposition temperature is 60-80 ℃, and the current density is 20-50 mAcm-2The deposition time is 18-24 h.
(2) Diffusion heat treatment of starting alloy ingot
Placing the alloy blank obtained in the step (1) in Ar/H2And carrying out diffusion heat treatment under a mixed protective atmosphere, wherein the heat treatment temperature is 900-1100 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 4-6 h.
(3) Grinding and polishing of alloy billet
And (3) grinding the alloy billet subjected to the diffusion heat treatment to be 8mm thick, mechanically polishing the surface of the alloy billet, and then carrying out acid cleaning to obtain the alloy billet with no obvious scratch on the surface and good smoothness.
(3) Deformation of
Carrying out cold rolling cogging on the high-tungsten alloy billet obtained in the step (1) to 6mm, wherein the ratio of rolling reduction per pass to pre-rolling thickness is 20-30%; and then cold rolling to 0.08mm, wherein the ratio of the rolling reduction of each pass to the pre-rolling thickness is 5%, four times of rolling intermediate heat treatment is added in the cold rolling process to relieve work hardening caused by rolling with large deformation, the temperature of the rolling intermediate heat treatment is 500-600 ℃, and the heat preservation time is 60 min.
(4) Recrystallization
And (3) carrying out two-step recrystallization heat treatment on the rolled nickel-tungsten alloy strip to obtain the nickel-tungsten alloy base band with the strong cubic texture. The temperature of the first recrystallization heat treatment is 700-750 ℃, and the temperature is kept for 60min, and the temperature of the second recrystallization heat treatment is 1050-1250 ℃, and the temperature is kept for 120 min.
The above heat treatments are all in H2Volume fraction of 4% Ar/H2The temperature is raised at the speed of 5 ℃/min in the mixed atmosphere, and the furnace is cooled.
Compared with the international optimized deformation process, the method for preparing the nano high-tungsten alloy base band billet for the coated conductor by the electrochemical deposition method provided by the invention innovatively starts from changing the billet preparation process, and adopts the electrochemical deposition method to prepare the billet, so that the high-tungsten alloy billet with the grain size of 30-80 nm is obtained. Compared with the nickel-tungsten alloy billet prepared by traditional smelting and powder metallurgy, the high-tungsten alloy billet prepared by the method has the advantages that the cubic texture forming capability is further improved, and the significance is obvious in the preparation of single-layer high-tungsten (see examples 1 and 2) and composite high-tungsten (see example 3) alloy base bands.
Drawings
FIG. 1 is a schematic diagram of electrochemical deposition principles;
FIG. 2 is a pole diagram of a deformed structure (111) after Ni8W is rolled to 0.08mm in example 1;
FIG. 3, pole drawing of the deformed structure (111) after Ni9.3W rolling to 0.08mm in example 2;
FIG. 4 shows a pole drawing of a deformed structure (111) after Ni8W/Ni12W/Ni8W is rolled to 0.08mm in example 3.
Detailed Description
Example 1
Sodium tungstate and nickel sulfate are used as main salts to prepare NiSO4·6H2The O content was 0.14mol L-1，Na2WO4·2H2The O content was 0.14mol L-1，Na3C6H5O7·2H2The O content was 0.50mol L-1，NH4Cl content of 0.50mol L-1With a NaBr content of 0.15mol L-1The solution was adjusted to pH 8.5 with aqueous ammonia at room temperature. The electrochemical deposition temperature is 80 ℃, and the current density is 30mA cm-2And the deposition time is 24h, so that a Ni8W alloy billet is obtained. And then carrying out heat preservation for 5h at 1000 ℃, polishing the Ni8W alloy billet to 8mm, then carrying out cold rolling cogging to 6mm, wherein the rolling reduction of each pass is 20-30% of the thickness before rolling, for example, the first rolling reduction is 1.6-2.4 mm, and the second rolling reduction is 20-30% of the thickness after the first rolling. And (3) continuously cold-rolling the alloy base band subjected to cold rolling and cogging to 0.08mm, wherein the rolling reduction of each pass is 5% of the thickness before rolling. Cold rolling processPerforming four rolling intermediate heat treatments of keeping the temperature at 500 ℃ for 60 min: the first rolling intermediate heat treatment is carried out when the rolling is carried out to 2mm, the second rolling intermediate heat treatment is carried out when the rolling is carried out to 1mm, the third rolling intermediate heat treatment is carried out when the rolling is carried out to 0.5mm, and the fourth rolling intermediate heat treatment is carried out when the rolling is carried out to 0.25 mm. Intermediate heat treatment of rolling in H2Volume fraction of 4% Ar/H2The temperature is raised at the speed of 5 ℃/min in the mixed atmosphere, and the furnace is cooled. Finally, the rolled Ni8W alloy strip is subjected to two-step recrystallization heat treatment to obtain a Ni8W base band with the cubic texture content (within 10 degrees of orientation difference) of 98%. Two-step recrystallization heat treatment in H2Volume fraction of 4% Ar/H2The first step of recrystallization heat treatment is carried out in a mixed atmosphere, the temperature of 750 ℃ is kept for 60min, the temperature of 1200 ℃ is kept for 120min, the temperature rise speed is 5 ℃/min, and furnace cooling is carried out.
Example 2
Sodium tungstate and nickel sulfate are used as main salts to prepare NiSO4·6H2The O content was 0.08mol L-1，Na2WO4·2H2The O content was 0.14mol L-1，Na3C6H5O7·2H2The O content was 0.50mol L-1，NH4Cl content of 0.50mol L-1With a NaBr content of 0.15mol L-1The solution was adjusted to pH 8.5 with aqueous ammonia at room temperature. The electrochemical deposition temperature is 80 ℃, and the current density is 30mA cm-2And the deposition time is 24h, so that a Ni9W alloy billet is obtained. And then carrying out homogenization heat treatment at 1100 ℃ for 4h, polishing the Ni9W alloy billet to 8mm, and then cogging and rolling to 6mm, wherein the rolling reduction of each pass is 20-30% of the thickness before rolling. And (3) continuously cold rolling the alloy base band after cogging to 0.08mm, wherein the rolling reduction of each pass is 5% of the thickness before rolling. Adding 4 times of rolling intermediate heat treatment for keeping the temperature at 600 ℃ for 60min in the cold rolling process: the first rolling intermediate heat treatment is carried out when the rolling is carried out to 3mm, the second rolling intermediate heat treatment is carried out when the rolling is carried out to 1.5mm, the third rolling intermediate heat treatment is carried out when the rolling is carried out to 0.75mm, and the fourth rolling intermediate heat treatment is carried out when the rolling is carried out to 0.25 mm. Intermediate heat treatment of rolling in H2Volume fraction of 4% Ar/H2The temperature is raised at the speed of 5 ℃/min in the mixed atmosphere, and the furnace is cooled. And finally, carrying out two-step recrystallization heat treatment on the rolled Ni9.3W alloy strip to obtain the Ni9W base strip with the cubic texture content (within 10 degrees of orientation difference) of 95%. Two-step recrystallization heat treatment in H2Volume fraction of 4% Ar/H2The first step of recrystallization heat treatment is carried out in a mixed atmosphere, the temperature of 750 ℃ is kept for 90min, the temperature of 1250 ℃ is kept for 120min, the temperature rise rate is 5 ℃/min, and furnace cooling is carried out.
Example 3
Sodium tungstate and nickel sulfate are used as main salts and are respectively provided with NiSO4·6H2The O content was 0.06,0.14mol L-1，Na2WO4·2H2The O content was 0.14mol L-1，Na3C6H5O7·2H2The O content was 0.50mol L-1，NH4Cl content of 0.50mol L-1With a NaBr content of 0.15mol L-1The solution was adjusted to pH 8.5 with aqueous ammonia at room temperature. At the deposition temperature of 80 ℃, the current density of 30mAcm-2Under the conditions of (1), 0.14mol L was used-1NiSO (D)4·6H2The mixed solution prepared from the O solution is used for depositing a Ni8W layer for 8 h. Then 0.06mol L was used under the same conditions-1NiSO (D)4·6H2Depositing Ni12W by the mixed solution prepared by the O solution for 6h, and finally depositing a Ni8W layer to obtain the composite base band alloy billet with the structure of Ni8W \ Ni12W \ Ni 8W. And then carrying out heat preservation for 6h at 1000 ℃, grinding and polishing the Ni8W/Ni12W/Ni8W alloy composite billet to 8mm, and then cogging and rolling to 6mm, wherein the rolling reduction of each pass is 20-30% of the thickness before rolling. And (3) continuously cold rolling the alloy base band after cogging to 0.08mm, wherein the rolling reduction of each pass is 5% of the thickness before rolling. Adding 4 times of rolling intermediate heat treatment with 550 ℃ heat preservation for 60min in the cold rolling process: the first rolling intermediate heat treatment is carried out when the rolling is carried out to 2mm, the second rolling intermediate heat treatment is carried out when the rolling is carried out to 1mm, the third rolling intermediate heat treatment is carried out when the rolling is carried out to 0.5mm, and the fourth rolling intermediate heat treatment is carried out when the rolling is carried out to 0.25 mm. Intermediate heat treatment of rolling in H2The volume fraction is 4%Ar/H of (1)2The temperature is raised at the speed of 5 ℃/min in the mixed atmosphere, and the furnace is cooled. Finally, the rolled Ni8W/Ni12W/Ni8W composite strip is subjected to two-step recrystallization heat treatment to obtain the Ni8W/Ni12W/Ni8W composite base band with the cubic texture content (within 10 degrees of orientation) of 97.4 percent. Two-step recrystallization heat treatment in H2Volume fraction of 4% Ar/H2The first step of recrystallization heat treatment is carried out in a mixed atmosphere, the temperature of 750 ℃ is kept for 60min, the temperature of 1250 ℃ is kept for 120min, the temperature rise rate is 5 ℃/min, and furnace cooling is carried out.
Claims (1)
1. A method for preparing a high-tungsten-nickel-base alloy base band billet for a coated conductor by an electrochemical deposition method is characterized by comprising the following steps:
(1) electrochemical deposition
Preparation of NiSO4·6H2The content of O is 0.06-0.14mol L-1，Na2WO4·2H2The O content was 0.14mol L-1，Na3C6H5O7·2H2The O content was 0.50mol L-1，NH4Cl content of 0.50mol L-1With a NaBr content of 0.15mol L-1The mixed solution of (1); adjusting the pH of the solution to 8.5 by using ammonia water at room temperature, wherein the deposition temperature is 60-80 ℃, and the current density is 20-50 mA cm-2The deposition time is 18-24 h;
(2) diffusion heat treatment of starting alloy ingot
Placing the alloy blank obtained in the step (1) in Ar/H2Carrying out diffusion heat treatment under a mixed protective atmosphere, wherein the heat treatment temperature is 900-1100 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 4-6 h;
(3) grinding and polishing of alloy blank
Grinding the alloy blank subjected to diffusion heat treatment to 8mm thick, mechanically polishing the surface of the alloy blank, and then carrying out acid cleaning to obtain an alloy billet with no obvious scratches on the surface;
(4) deformation of
Carrying out cold rolling cogging on the high-tungsten alloy billet obtained in the step (3) to 6mm, wherein the ratio of rolling reduction per pass to pre-rolling thickness is 20-30%; then cold rolling to 0.08mm, wherein the ratio of rolling reduction of each pass to pre-rolling thickness is 5%, four times of rolling intermediate heat treatment is added in the cold rolling process to relieve work hardening caused by rolling with large deformation, the temperature of the rolling intermediate heat treatment is 500-600 ℃, and the heat preservation time is 60 min;
(5) recrystallization
Carrying out two-step recrystallization heat treatment on the rolled nickel-tungsten alloy base band to obtain a strong cube texture nickel-tungsten alloy base band; the temperature of the first recrystallization heat treatment is 700-750 ℃, and the temperature is kept for 60min, and the temperature of the second recrystallization heat treatment is 1050-1250 ℃, and the temperature is kept for 120 min;
the above heat treatments are all in H2Volume fraction of 4% Ar/H2The temperature is raised at the speed of 5 ℃/min in the mixed atmosphere, and the furnace is cooled.
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