CN111850325A - Method for preparing tantalum two-point pentatungsten alloy ingot from tantalum and tantalum-tungsten reclaimed materials - Google Patents
Method for preparing tantalum two-point pentatungsten alloy ingot from tantalum and tantalum-tungsten reclaimed materials Download PDFInfo
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Abstract
The method for preparing the tantalum two-point pentatungsten alloy ingot from the tantalum and tantalum tungsten reclaimed materials comprises the steps of utilizing leftover reclaimed materials generated in the tantalum or tantalum tungsten alloy processing process, carrying out acid/water washing, hydrogenation, dehydrogenation and grinding on the reclaimed materials to prepare tantalum powder or tantalum tungsten alloy powder of-200 meshes, carrying out analysis and detection, blending, pressing and placing in a vacuum sintering furnace to prepare a tantalum 2.5 tungsten alloy sintering strip, and smelting the post-sintering strip in a vacuum electron beam furnace to obtain the tantalum 2.5 tungsten alloy ingot. The method prepares the tantalum 2.5 tungsten alloy cast ingot which meets specific conditions and related quality standards by using the scrap reclaimed materials produced in the tantalum or tantalum-tungsten alloy processing process and adopting a multi-step pyrogenic process treatment process. The method realizes the recycling of the tantalum and tantalum-tungsten alloy reclaimed materials with short flow and high yield, and solves the problems of complex process flow, multiple procedures, low tantalum and tungsten metal yield, great environmental pollution in the production process and the like in the existing method for producing tantalum 2.5 tungsten alloy ingots.
Description
Technical Field
The application relates to the technical field of metal material preparation, in particular to a method for preparing a tantalum two-point pentatungsten alloy ingot by using tantalum and tantalum tungsten reclaimed materials.
Background
The tantalum-tungsten binary system alloy formed by adding a certain amount of tungsten element into tantalum has the corrosion resistance of tantalum and the good high-temperature strength of tungsten. The alloy has the advantages of high temperature resistance, high strength, good fracture toughness, corrosion resistance and the like, and is applied to the fields of aviation, aerospace, chemical engineering, nuclear industry, high temperature technology and the like.
In the method for producing tantalum two-point pentatungsten (hereinafter referred to as tantalum 2.5 tungsten) alloy ingot by the traditional process, a treatment process route of hydrometallurgy purification and recovery is adopted, and as shown in figure 1, a finished ingot blank is obtained by fully mixing tantalum powder and tungsten powder and smelting for multiple times.
However, in the above method for preparing tantalum 2.5 tungsten alloy ingot, the processing route of hydrometallurgical purification and recovery requires multiple processes such as wet decomposition, extraction, crystallization, sodium reduction, oil pressure forming, vacuum sintering, and electron beam melting, and the operation flow is complicated, so that a large amount of equipment investment is required, and the comprehensive yield of tantalum and tungsten as recovered materials is low. Meanwhile, in the wet decomposition process, a large amount of mixed acid is consumed, and a large amount of acid-containing wastewater and waste gas are generated, so that the environment is polluted.
Disclosure of Invention
The application provides a method for preparing tantalum 2.5 tungsten alloy ingots by tantalum and tantalum tungsten reclaimed materials, which aims to solve the problems of complex flow, multiple working procedures, low tantalum and tungsten metal yield, great environmental pollution in the production process and the like in the traditional method for producing tantalum powder by acid decomposition and metal reduction purification of the tantalum and tantalum tungsten reclaimed materials and producing tantalum 2.5 tungsten alloy ingots by using the tantalum powder and the tungsten powder.
The technical scheme adopted by the application for solving the technical problems is as follows:
a method for preparing tantalum 2.5 tungsten alloy ingots by tantalum and tantalum tungsten reclaimed materials comprises the following steps:
s1: acid washing tantalum, tantalum 2.5 tungsten alloy or tantalum 10 tungsten alloy reclaimed materials with different forms by adopting mixed acid;
s2: washing the acid-washed reclaimed materials with water by adopting ultrasonic waves to obtain impurity-removed reclaimed materials;
s3: loading the reclaimed materials after impurity removal into a hydrogenation furnace, heating in a sectional heating mode, then preserving heat, introducing hydrogen after heat preservation is finished, cooling after hydrogen introduction is finished, and discharging to obtain hydrogenated materials;
s4: grinding and screening the hydrogenated material by using a grinding and screening machine through a 200-mesh screen to obtain fine material powder;
s5: dehydrogenating the material fine powder;
s6: performing content detection analysis on the dehydrogenated material fine powder, adjusting the oxygen-carbon ratio in the mixed material, and if the O/C is less than 10, adding theoretical amount of tantalum oxide to obtain mixed powder with the oxygen-carbon ratio O/C more than or equal to 10;
s7: pressing the mixed powder into tantalum 2.5 tungsten alloy strips;
s8: putting the pressed tantalum 2.5 alloy strip into a vacuum sintering furnace, vacuumizing, heating and sintering to prepare a tantalum 2.5 tungsten alloy strip;
s9: and smelting the tantalum 2.5 tungsten alloy strip by using a vacuum electron beam furnace to obtain a tantalum 2.5 tungsten alloy ingot.
Optionally, the mixed acid is a mixed solution of hydrofluoric acid, nitric acid and phosphoric acid, and the volume ratio of the hydrofluoric acid to the nitric acid to the phosphoric acid is 1: 1: 2, the pickling time is 1-3 h.
Optionally, in S3, the maximum temperature is 850 ℃, the holding time is 4 hours, the hydrogen introduction time is 4 hours, and the temperature is reduced to below 60 ℃ and the steel is taken out of the furnace.
Optionally, the dehydrogenation process comprises:
and (3) carrying out programmed heating on the material fine powder from room temperature to 450 ℃ within 2 hours, then carrying out heat preservation for 2 hours, then carrying out programmed heating from room temperature to 700 ℃ within 2 hours, carrying out heat preservation for 4 hours, then carrying out programmed heating from room temperature to 850 ℃ within 2 hours, carrying out heat preservation for 6 hours, then carrying out power-off cooling when the vacuum degree is less than 30pa, and carrying out discharging when the temperature is reduced to below 60 ℃.
Optionally, the sintering includes: at a vacuum degree of 10-2And under pa, carrying out sectional sintering by raising the temperature to 2400 ℃ in a programmed manner.
Optionally, in the step S9, the number of times of smelting is 2 to 3.
Optionally, the milling and screening machine is a tantalum lining milling and screening machine.
Optionally, the S7 includes:
and pressing the mixed powder into the tantalum 2.5 tungsten alloy strip by adopting an isostatic pressing or mould pressing mode under the condition that the forming pressure is more than or equal to 200 MPa.
The technical scheme provided by the application comprises the following beneficial technical effects:
the method for preparing the tantalum 2.5 tungsten alloy ingot from the tantalum and tantalum tungsten reclaimed materials comprises the steps of utilizing leftover reclaimed materials generated in the tantalum or tantalum tungsten alloy processing process as raw materials through a multi-step pyrometallurgical treatment process, carrying out acid/water washing, hydrogenation, dehydrogenation and grinding and screening on the raw materials to prepare tantalum powder or tantalum tungsten alloy powder with the particle size of-200 meshes, carrying out analysis and detection, blending, pressing and placing in a vacuum sintering furnace to prepare a tantalum 2.5 tungsten alloy sintering strip, and smelting the sintering strip in a vacuum electron beam furnace to obtain the tantalum 2.5 tungsten alloy ingot. According to the method, the tantalum 2.5 tungsten alloy cast ingot which meets specific conditions and meets related quality standards is prepared by using the scrap reclaimed materials generated in the tantalum or tantalum-tungsten alloy processing process and adopting a multi-step pyrogenic process treatment process. The method realizes the recycling of the tantalum and tantalum-tungsten alloy reclaimed materials with short flow and high yield, and solves the problems of complicated flow, various procedures, low tantalum and tungsten metal yield, great environmental pollution in the production process and the like in the method for producing tantalum 2.5 tungsten alloy ingots by using tantalum powder and tungsten powder to produce tantalum powder by acid decomposition and metal reduction purification of the tantalum and tantalum-tungsten reclaimed materials in the traditional process.
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In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a flow chart of a method for producing tantalum 2.5 tungsten alloy ingots by a conventional wet process;
fig. 2 is a flowchart of a method for preparing a tantalum 2.5 tungsten alloy ingot according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions in the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; it is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. 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 application.
The embodiment of the application provides a method for preparing a tantalum 2.5 tungsten alloy ingot from a tantalum and tantalum-tungsten reclaimed material, which comprises the following steps:
s1: acid cleaning tantalum, tantalum 2.5 tungsten alloy or tantalum 10 tungsten alloy reclaimed materials with different forms by adopting mixed acid, wherein the reclaimed materials can be one of tantalum, tantalum 2.5 tungsten alloy or tantalum 10 tungsten alloy, or can be a plurality of reclaimed materials mixed together; the mixed acid is a mixed solution of hydrofluoric acid, nitric acid and phosphoric acid, and the volume ratio of the hydrofluoric acid to the nitric acid to the phosphoric acid is 1: 1: 2, pickling for 1-3 h; (ii) a
S2: washing the acid-washed reclaimed materials with water by adopting ultrasonic waves to obtain impurity-removed reclaimed materials;
s3: loading the reclaimed materials after impurity removal into a hydrogenation furnace, heating in a sectional heating mode, then preserving heat, introducing hydrogen after heat preservation is finished, cooling after hydrogen introduction is finished, and discharging to obtain hydrogenated materials; the maximum temperature is 850 ℃, the heat preservation time is 4 hours, the hydrogen introduction time is 4 hours, and the temperature is reduced to below 60 ℃ and the steel plate is discharged.
S4: grinding and screening the hydrogenated material by using a tantalum lining grinding and screening machine through a 200-mesh screen to obtain fine material powder;
s5: and (3) dehydrogenating the material fine powder, wherein the dehydrogenation process comprises the following steps:
and (3) carrying out programmed heating on the material fine powder from room temperature to 450 ℃ within 2 hours, then carrying out heat preservation for 2 hours, then carrying out programmed heating from room temperature to 700 ℃ within 2 hours, carrying out heat preservation for 4 hours, then carrying out programmed heating from room temperature to 850 ℃ within 2 hours, carrying out heat preservation for 6 hours, then carrying out power-off cooling when the vacuum degree is less than 30pa, and carrying out discharging when the temperature is reduced to below 60 ℃.
S6: performing content detection analysis on the dehydrogenated material fine powder, wherein the content detection analysis comprises analyzing and detecting the dehydrogenated tantalum powder, tantalum 2.5 tungsten powder and tantalum 10 tungsten powder, and reserving the powder for blending; mixing the powder materials for 10 hours after different combinations and proportions are blended, controlling the oxygen-carbon ratio in the mixed material, and if the O/C is less than 10, adding theoretical amount of tantalum oxide to obtain the mixed powder material with the oxygen-carbon ratio O/C more than or equal to 10.
S7: pressing the mixed powder into a tantalum 2.5 tungsten alloy strip, specifically pressing the mixed powder into the tantalum 2.5 tungsten alloy strip by adopting an isostatic pressing or mould pressing mode under the condition that the forming pressure is more than or equal to 200 MPa.
S8: putting the pressed tantalum 2.5 alloy strip into a vacuum sintering furnace, vacuumizing, heating and sintering to prepare the tantalum 2.5 tungsten alloy strip, wherein the sintering process is to perform sintering under the vacuum degree of 10-2And under pa, carrying out sectional sintering by raising the temperature to 2400 ℃ in a programmed manner.
S9: and smelting the tantalum 2.5 tungsten alloy strip for 2-3 times by using a vacuum electron beam furnace to obtain a tantalum 2.5 tungsten alloy ingot.
To further illustrate the technical means and effects of the present application for achieving the intended purpose, the following describes a specific embodiment of the present application and its effects with reference to the process flow and specific examples in fig. 2, and the following detailed description is provided.
Example 1:
1) and (3) respectively using HF (hydrogen fluoride): HNO: h3PO41: 1: 2, soaking and pickling with the mixed acid for 2 hours, and washing with ultrasonic water after pickling is finished to remove oil stains to obtain a reclaimed material after impurity removal.
2) And (3) loading the reclaimed materials after impurity removal into a hydrogenation furnace, heating to 850 ℃ in a sectional manner, preserving heat for 4 hours, introducing hydrogen for 4 hours, cutting off power, cooling to below 60 ℃, and discharging.
3) And (3) putting the hydrogenated tantalum material into a tantalum lining grinding and screening machine, and grinding the tantalum material into fine powder of-200 meshes.
4) Transferring the tantalum powder into a dehydrogenation furnace, gradually heating to 850 ℃, keeping the temperature for more than or equal to 6 hours, cutting off the power when the vacuum is less than 30pa, and cooling to below 60 ℃ to discharge.
5) 195Kg of tantalum powder after dehydrogenation is taken and mixed with 5Kg of tungsten powder.
6) And mixing the materials for 10 hours by using a V-shaped mixer, detecting whether the O/C of the mixed powder is more than or equal to 10, and if the O/C is less than 10, adding theoretical amount of tantalum oxide to meet the requirement.
7) And pressing the mixed powder into a tantalum 2.5 tungsten alloy strip by using an oil press.
8) Putting the pressed tantalum 2.5 alloy strip into a vacuum sintering furnace, and vacuumizing to 10 DEG-2pa, heating to 2400 ℃ and sintering to obtain compact alloy strips.
9) Will be sinteredTantalum 2.5 tungsten alloy strip, using vacuum electron beam furnace, under vacuum not more than 4X 10-4Smelting for 2-3 times in a mbar manner to obtain tantalum 2.5 tungsten alloy cast ingots.
Example 2:
1) and (3) respectively using HF (hydrogen fluoride) as the recovered tantalum and tantalum 10 tungsten processing material leftover materials with different forms: HNO: h3PO41: 1: 2, soaking and pickling with mixed acid for 2 hours, and ultrasonically washing with water to remove oil stains.
2) And respectively loading the cleaned tantalum and tantalum 10 tungsten leftover materials into different hydrogenation furnaces, heating to 850 ℃ in a sectional manner, preserving heat for 4 hours, introducing hydrogen for 4 hours, cutting off power, cooling to below 60 ℃, and discharging.
3) And (3) respectively putting the hydrogenated tantalum material and the tantalum 10 tungsten material into different tantalum lining grinding and screening machines, and grinding the tantalum material and the tantalum 10 tungsten material to obtain fine powder of-200 meshes.
4) Respectively transferring tantalum powder and tantalum 10 tungsten powder into different dehydrogenation furnaces, gradually heating to 850 ℃, keeping the temperature for more than or equal to 6 hours, cutting off the power when the vacuum is less than 30pa, and cooling to below 60 ℃ to discharge.
5) 150Kg of tantalum powder after dehydrogenation and 50Kg of tantalum 10 tungsten powder are mixed.
6) And mixing the materials for 10 hours by using a V-shaped mixer, detecting whether the O/C of the mixed powder is more than or equal to 10, and if the O/C is less than 10, adding theoretical amount of tantalum oxide to meet the requirement.
7) And pressing the mixed powder into a tantalum 2.5 tungsten alloy strip by using an oil press.
8) Putting the pressed tantalum 2.5 alloy strip into a vacuum sintering furnace, and vacuumizing to 10 DEG-2pa, heating to 2400 ℃ and sintering to obtain compact alloy strips.
9) Sintering tantalum 2.5 tungsten alloy strip in vacuum electron beam furnace at vacuum degree not more than 4 × 10-4Smelting for 2-3 times in a mbar manner to obtain tantalum 2.5 tungsten alloy cast ingots.
Example 3:
1) and (3) respectively using HF (hydrogen fluoride) as the leftover materials of the tantalum, the tantalum 2.5 tungsten and the tantalum 10 tungsten processing materials with different forms for recovery: HNO: h3PO41: 1: 2, soaking and pickling with mixed acid for 2 hours, and ultrasonically washing with water to remove oil stains.
2) And respectively loading the cleaned tantalum, tantalum 2.5 tungsten and tantalum 10 tungsten leftover materials into different hydrogenation furnaces, heating to 850 ℃ in a sectional manner, preserving heat for 4 hours, introducing hydrogen for 4 hours, cutting off power, cooling to below 60 ℃, and discharging.
3) And (3) respectively putting the hydrogenated tantalum material, tantalum 2.5 tungsten material and tantalum 10 tungsten material into different tantalum lining grinding and screening machines, and grinding the materials to be fine powder of-200 meshes.
4) Respectively transferring tantalum powder, tantalum 2.5 tungsten powder and tantalum 10 tungsten powder into different dehydrogenation furnaces, gradually heating to 850 ℃, keeping the temperature for more than or equal to 6 hours, cutting off power when the vacuum is less than 30pa, and cooling to below 60 ℃ to discharge.
5) 112.5Kg of tantalum powder after dehydrogenation, 50Kg of tantalum 2.5 tungsten powder and 37.5Kg of tantalum 10 tungsten powder are mixed.
6) And mixing the materials for 10 hours by using a V-shaped mixer, detecting whether the O/C of the mixed powder is more than or equal to 10, and if the O/C is less than 10, adding theoretical amount of tantalum oxide to meet the requirement.
7) And pressing the mixed powder into a tantalum 2.5 tungsten alloy strip by using an oil press.
8) Putting the pressed tantalum 2.5 alloy strip into a vacuum sintering furnace, and vacuumizing to 10 DEG-2pa, heating to 2400 ℃ and sintering to obtain compact alloy strips.
9) Sintering tantalum 2.5 tungsten alloy strip in vacuum electron beam furnace at vacuum degree not more than 4 × 10-4Smelting for 2-3 times in a mbar manner to obtain tantalum 2.5 tungsten alloy cast ingots.
The tantalum 2.5 tungsten ingots produced by the above three embodiments correspond to samples # 1, # 2 and # 3 respectively, the ingots are sampled by three points from top to bottom, and the detection results are as follows:
as can be seen from the measurement results in the table above, the tantalum 2.5 tungsten ingot prepared by the technical scheme in the application has uniform alloy element components in each sample, and other metal impurities and gas elements meet the actual requirements, which indicates that the tantalum 2.5 tungsten ingot produced by the embodiment of the application has good tissue component uniformity.
In summary, in the method provided in this embodiment, by using the scrap recycled material generated in the tantalum or tantalum-tungsten alloy processing process as the raw material through a multi-step pyrometallurgical treatment process, the raw material is subjected to acid/water washing, hydrogenation, dehydrogenation and grinding to prepare tantalum powder or tantalum-tungsten alloy powder of-200 meshes, and after analysis, detection, blending, pressing and placing into a vacuum sintering furnace, the tantalum 2.5 tungsten alloy sintered strip is prepared, and the post-sintered strip is melted in a vacuum electron beam furnace, so as to obtain the tantalum 2.5 tungsten alloy ingot. The method utilizes the leftover materials produced in the tantalum or tantalum-tungsten alloy processing process to prepare the tantalum 2.5 tungsten alloy cast ingot which meets specific conditions and meets related quality standards through a multi-step pyrogenic process treatment process, realizes short-process recycling of the leftover materials of the tantalum and the tantalum-tungsten alloy, and has the remarkable advantages of small environmental pollution, simple process flow, low recycling cost and high comprehensive yield compared with a treatment process route (shown in figure 1) of hydrometallurgical purification recycling.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be understood that the present application is not limited to what has been described above and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (8)
1. A method for preparing tantalum two-point pentatungsten alloy ingots by tantalum and tantalum tungsten reclaimed materials is characterized by comprising the following steps:
s1: acid washing tantalum, tantalum two-point pentatungsten alloy or tantalum 10 tungsten alloy reclaimed materials with different forms by adopting mixed acid;
s2: washing the acid-washed reclaimed materials with water by adopting ultrasonic waves to obtain impurity-removed reclaimed materials;
s3: loading the reclaimed materials after impurity removal into a hydrogenation furnace, heating in a sectional heating mode, then preserving heat, introducing hydrogen after heat preservation is finished, cooling after hydrogen introduction is finished, and discharging to obtain hydrogenated materials;
s4: grinding and screening the hydrogenated material by using a grinding and screening machine through a 200-mesh screen to obtain fine material powder;
s5: dehydrogenating the material fine powder;
s6: performing content detection analysis on the dehydrogenated material fine powder, adjusting the oxygen-carbon ratio in the mixed material, and if the O/C is less than 10, adding theoretical amount of tantalum oxide to obtain mixed powder with the oxygen-carbon ratio O/C more than or equal to 10;
s7: pressing the mixed powder into a tantalum two-point five-tungsten alloy strip;
s8: putting the pressed tantalum two-point five-alloy strip into a vacuum sintering furnace, vacuumizing, heating and sintering to prepare the tantalum two-point five-tungsten alloy strip;
s9: and smelting the tantalum two-point pentatungsten alloy strip by using a vacuum electron beam furnace to obtain the tantalum two-point pentatungsten alloy ingot.
2. The method for preparing tantalum two-point pentatungsten alloy ingots by using the tantalum and tantalum-tungsten reclaimed materials as claimed in claim 1, wherein the mixed acid is a mixed solution of hydrofluoric acid, nitric acid and phosphoric acid, and the volume ratio of the hydrofluoric acid to the nitric acid to the phosphoric acid is 1: 1: 2, the pickling time is 1-3 h.
3. The method for preparing the tantalum two-point pentatungsten alloy ingot from the tantalum and tantalum tungsten reclaimed materials according to claim 1, wherein in the step S3, the temperature is raised to the maximum temperature of 850 ℃, the holding time is 4 hours, the hydrogen introducing time is 4 hours, and the ingot is discharged after being cooled to the temperature below 60 ℃.
4. The method for preparing tantalum two-point pentatungsten alloy ingot from tantalum and tantalum-tungsten reclaimed materials according to claim 1, wherein the dehydrogenation process comprises the following steps:
and (3) carrying out programmed heating on the material fine powder from room temperature to 450 ℃ within 2 hours, then carrying out heat preservation for 2 hours, then carrying out programmed heating from room temperature to 700 ℃ within 2 hours, carrying out heat preservation for 4 hours, then carrying out programmed heating from room temperature to 850 ℃ within 2 hours, carrying out heat preservation for 6 hours, then carrying out power-off cooling when the vacuum degree is less than 30pa, and carrying out discharging when the temperature is reduced to below 60 ℃.
5. The method for preparing tantalum two-point pentatungsten alloy ingots by tantalum and tantalum tungsten reclaimed materials according to claim 1, wherein the sintering comprises: at a vacuum degree of 10-2And under pa, carrying out sectional sintering by raising the temperature to 2400 ℃ in a programmed manner.
6. The method for preparing tantalum two-point pentatungsten alloy ingots by using the tantalum and tantalum-tungsten reclaimed materials as claimed in claim 1, wherein in the step S9, the smelting times are 2-3 times.
7. The method for preparing tantalum two-point pentatungsten alloy ingots by using the tantalum and tantalum-tungsten reclaimed materials as claimed in claim 1, wherein the grinding and screening machine is a tantalum lining grinding and screening machine.
8. The method for preparing tantalum two-point pentatungsten alloy ingot from tantalum and tantalum tungsten reclaimed materials according to claim 1, wherein the step S7 comprises the following steps:
and pressing the mixed powder into the tantalum two-point five-tungsten alloy strip by adopting an isostatic pressing or mould pressing mode under the condition that the forming pressure is more than or equal to 200 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010730031.8A CN111850325A (en) | 2020-07-27 | 2020-07-27 | Method for preparing tantalum two-point pentatungsten alloy ingot from tantalum and tantalum-tungsten reclaimed materials |
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