CN115194155B - High-strength high-specific gravity alloy plate and preparation method thereof - Google Patents
High-strength high-specific gravity alloy plate and preparation method thereof Download PDFInfo
- Publication number
- CN115194155B CN115194155B CN202110312511.7A CN202110312511A CN115194155B CN 115194155 B CN115194155 B CN 115194155B CN 202110312511 A CN202110312511 A CN 202110312511A CN 115194155 B CN115194155 B CN 115194155B
- Authority
- CN
- China
- Prior art keywords
- blank
- multiplied
- powder
- hours
- annealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 41
- 239000000956 alloy Substances 0.000 title claims abstract description 38
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 37
- 230000005484 gravity Effects 0.000 title claims abstract description 33
- 238000000137 annealing Methods 0.000 claims abstract description 67
- 238000005098 hot rolling Methods 0.000 claims abstract description 61
- 239000000843 powder Substances 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000005245 sintering Methods 0.000 claims abstract description 50
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 30
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910001080 W alloy Inorganic materials 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000010941 cobalt Substances 0.000 claims abstract description 15
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 15
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 11
- 239000011572 manganese Substances 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 32
- 238000004321 preservation Methods 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 17
- 229910052786 argon Inorganic materials 0.000 claims description 16
- 238000009694 cold isostatic pressing Methods 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 14
- 229910052721 tungsten Inorganic materials 0.000 abstract description 11
- 239000010937 tungsten Substances 0.000 abstract description 11
- 238000003754 machining Methods 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 8
- 229910000863 Ferronickel Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 150000002431 hydrogen Chemical group 0.000 description 4
- 229910003271 Ni-Fe Inorganic materials 0.000 description 2
- MZZUATUOLXMCEY-UHFFFAOYSA-N cobalt manganese Chemical compound [Mn].[Co] MZZUATUOLXMCEY-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- CNEJZXSYEGWZEV-UHFFFAOYSA-N [Co].[Mn].[Ni].[Fe] Chemical compound [Co].[Mn].[Ni].[Fe] CNEJZXSYEGWZEV-UHFFFAOYSA-N 0.000 description 1
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/006—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of flat products, e.g. sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- 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
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
- B22F2003/185—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers by hot rolling, below sintering temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention discloses a high-strength high-specific gravity alloy plate and a preparation method thereof, wherein the alloy plate comprises a tungsten matrix, and also comprises an alloy consisting of one or more elements of nickel, iron, cobalt and manganese, wherein the content of tungsten is 89-95%, and the content of cobalt is not more than 4%; the manganese content is not more than 0.5%. The preparation method comprises the following steps: preparing tungsten alloy powder, pressing and forming, sintering, carrying out vacuum heat treatment on a sintered plate, carrying out hot rolling treatment on a sintered blank, carrying out vacuum annealing treatment on the hot rolled blank in a vacuum state, wherein the hot rolling process and the annealing heat treatment process can be circularly carried out according to the actual condition and the size of the blank until the ideal size and state are reached. And finally, machining to obtain the size of the finished product. The invention has the technical effects that the blank can be straightened by adding an improved rolling procedure, and in addition, a large machining allowance is not required to be reserved, and a finished product can be obtained. Not only reduces the preparation cost, but also improves the material strength by means of deformation strengthening.
Description
Technical Field
The invention belongs to the technical field of rare refractory metals, and particularly relates to a high-strength high-specific gravity alloy plate and a preparation method thereof.
Background
High specific gravity alloys are generally referred to as two-phase alloys with tungsten as the matrix and Ni-Fe or Ni-Cu as the binder phase. The high specific gravity alloy has the advantages of high density, high hardness, good ductility, good machining performance, small thermal expansion coefficient, large heat conductivity coefficient, good oxidation resistance and corrosion resistance and the like, is widely applied to the fields of advanced medical treatment, military industry and civil industry, and particularly a large-size W-Ni-Fe alloy plate element, and is more and more valued and applied due to the good ray shielding effect. In recent years, with the development of society, the innovation and development of medical civil products and equipment, and the continuous upgrading of military industrial and industrial equipment, the performance of high-specific-gravity plates is more and more required. Therefore, the improvement of the mechanical properties of large-scale high-specific-gravity plates becomes a difficult problem to overcome.
The large-size thick plate with high specific gravity is usually prepared by adopting a cold isostatic pressing process to press a pressed compact, and then sintering, heat treatment, machining and other procedures. However, the plate products are easy to deform, bend and shrink unevenly in the sintering process. This results in that larger dimensions are reserved during the preparation to ensure the finished product, which increases the preparation cost to a certain extent. In addition, the product prepared by the method is in a sintered state, and has lower performance compared with a deformed state product, so that the application range is limited.
The rolling process is used as a mode of deformation reinforcement, can improve the strength and ensure certain toughness, so that the rolling process is often used for preparing various alloy materials. However, research data at home and abroad are turned over to find that the rolling process is applied to the field of high specific gravity, and most of the rolling process is focused on small-specification products such as sheets, thin plates and the like, but reports on plate products with larger thickness and width are less.
Disclosure of Invention
The invention aims to solve the technical problems of material cost and high cost in the conventional preparation method of large-size high-specific-gravity plates and provides a high-strength high-specific-gravity alloy plate.
The invention further aims to improve the mechanical property of the high-specific-gravity plate by improving the rolling process, widen the application range of materials and provide a rolling preparation process suitable for high-specific-gravity plate products.
In order to solve the technical problems, the invention adopts the following technical scheme: the high-strength high-specific gravity alloy plate comprises a tungsten matrix, and also comprises an alloy consisting of one or more elements of nickel, iron, cobalt and manganese, wherein the tungsten content is 89-95% by weight, and other alloy components account for 5-11% by weight, and the other alloy components are any one of ferronickel, ferronickel cobalt and ferronickel cobalt manganese, and the cobalt content is less than or equal to 4%; the manganese content is less than or equal to 0.5.
As a preferred embodiment, the alloy sheet is produced by a rolling process in order to increase the strength and toughness of the alloy sheet.
The invention also provides a preparation method of the high-strength high-specific gravity alloy plate, which comprises the following steps:
step one, preparing tungsten alloy powder: selecting tungsten powder, adding one or more of nickel powder, iron powder, cobalt powder and manganese powder into the tungsten powder, mixing the tungsten powder, the iron powder, the cobalt powder and the manganese powder on a three-dimensional mixer to obtain a mixed material, and sieving the mixed material to obtain a uniform mixed raw material;
step two, press forming: adopting a cold isostatic pressing process to press and shape the mixed raw materials, loading the mixed raw materials obtained in the step one into a rubber sleeve, immersing into an oil cylinder, and adopting a mode of isotropic pressure to shape a platy pressed compact;
step three, sintering treatment: sintering the platy blank in the second step in a hydrogen atmosphere to obtain platy sintered blank;
step four, carrying out vacuum heat treatment on the sintered platy sintered blank;
step five, carrying out hot rolling treatment on the plate-shaped sintered blank subjected to the vacuum heat treatment to obtain a blank;
step six, annealing the hot rolled blank in a vacuum state;
and step five and step six are circularly carried out according to the actual size of the blank until the required size is reached, and the blank after the step five and the step six is subjected to machining treatment to finally obtain the alloy plate with the specified size.
In the first step of the preparation method, the tungsten powder is selected from conventional tungsten powder, the granularity (such as Fisher granularity) is 2.0-4.0 mu m, the nickel powder is electrolytic nickel powder or carbonyl nickel powder, the iron powder is electrolytic iron powder or carbonyl iron powder, and the cobalt powder and the manganese powder are conventional industrial powder.
In the first preparation method step, the mixed powder is screened as follows: 80-140 meshes.
In the first step of the preparation method, the mixing time is 2-8 h, and the rotating speed is 100-500 r/min.
In the second step of the preparation method, the pressure is set to be 180-250 MPa and the dwell time is 30-120 min in the cold isostatic pressing process.
In the third step of the preparation method, hydrogen is adopted in the atmosphere in the sintering furnace, the sintering temperature is 1200-1450 ℃ and the heat preservation time is 0.5-4 h.
In the fourth step of the preparation method, the heat treatment after sintering is performed under vacuum, wherein the vacuum degree is lower than 10 -1 Pa, the temperature of the heat treatment after sintering is 900-1200 ℃, and the time of the heat treatment after sintering is 1-8 h.
In the fifth step of the preparation method, the hot rolling temperature is 600-800 ℃. The heat preservation time of the hot rolling is 1 to 3 hours.
In the sixth preparation method step, the annealing atmosphere is in a vacuum state, the annealing temperature ranges from 1000 ℃ to 1200 ℃, and the annealing time ranges from 1h to 4h.
The invention has the technical effects and advantages that: compared with the prior art, the high-strength high-specific gravity alloy plate obtained by the method has higher strength and better toughness, and the preparation process has the advantages that: the improved rolling procedure is added, so that the billet can be straightened. In addition, a large machining allowance is not required to be reserved, and a finished product can be obtained. Not only reduces the preparation cost, but also improves the material strength by means of deformation strengthening.
Drawings
FIG. 1 is a schematic diagram of a preparation process flow of the invention;
FIG. 2 is a metallographic structure of a tungsten alloy sheet prepared in example 1 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a high-strength high-specific gravity alloy plate and a preparation method thereof as shown in figure 1, wherein the alloy plate comprises a tungsten matrix, and alloy consisting of one or more elements of nickel, iron, cobalt and manganese is also added in the tungsten matrix, the alloy plate comprises 89-95% of tungsten and 5-11% of other components by weight percent, wherein the other alloy components comprise any one of nickel iron, nickel iron cobalt and nickel iron cobalt manganese, and the cobalt content is less than or equal to 4%; the manganese content is less than or equal to 0.5 percent. A tungsten skeleton is selected, so that the specific gravity and the strength of the alloy are ensured; the latter is formed by alloy elements and tungsten (in liquid phase during sintering), and the tungsten framework is filled, so that the strength of the alloy can be improved and the plasticity of the alloy can be improved. Meanwhile, in order to improve the strength and toughness of the alloy plate, the alloy plate is produced by adopting a rolling process.
The preparation method comprises the following steps:
step one, preparing tungsten alloy powder: selecting tungsten powder, adding one or more of nickel powder, iron powder, cobalt powder and manganese powder into the tungsten powder, mixing the tungsten powder, the iron powder, the cobalt powder and the manganese powder on a three-dimensional mixer to obtain a mixed material, and sieving the mixed material to obtain a uniform mixed raw material;
step two, press forming: adopting a cold isostatic pressing process to perform compression molding, loading the mixed raw materials in the step one into a rubber sleeve, immersing into an oil cylinder, and forming a platy pressed compact in a mode of isotropic pressure;
step three, sintering treatment: sintering the platy pressed blank formed in the second step in a hydrogen atmosphere to obtain platy sintered blank;
step four, carrying out vacuum heat treatment on the sintered platy sintered blank;
step five, carrying out hot rolling treatment on the plate-shaped sintered blank subjected to the vacuum heat treatment to obtain a blank;
step six, performing vacuum annealing treatment on the blank after hot rolling in a vacuum state;
and step five and step six can be circularly carried out according to the annealing condition of the blank and the obtained actual size until the required size and state are reached. And step five and step six, the blank is required to be processed by a machine to finally obtain the finished product size.
Specifically, in the above preparation method, as a preferred embodiment, in the mixed raw material in the first step, the tungsten content is 89-95% by weight, and the other alloy components account for 5-11% by weight. Wherein the other components are any one of ferronickel, ferronickel cobalt and ferronickel cobalt manganese. Wherein cobalt is 4% or less; manganese less than or equal to 0.5%.
In the first step of the preparation method, the tungsten powder is conventional tungsten powder, the granularity (such as Fisher granularity) is 2.0-4.0 μm (such as 2.2 μm, 2.5 μm, 3 μm, 3.5 μm and 3.8 μm), the nickel powder is electrolytic nickel powder or carbonyl nickel powder, the iron powder is electrolytic iron powder or carbonyl iron powder, and the cobalt powder and the manganese powder are conventional industrial powder.
In the first preparation method step, the mixed raw materials are sieved as follows: 80-140 mesh (e.g., 80 mesh, 90 mesh, 100 mesh, 110 mesh, 120 mesh, 130 mesh, 140 mesh).
In the first step of the preparation method, the mixing time is 2-8 h (such as 2h, 3h, 4h, 5h, 6h, 7h and 8 h), and the rotating speed is 100-500 r/min (such as 120r/min, 150r/min, 200r/min, 250r/min, 300r/min, 350r/min, 400r/min and 450 r/min).
In the second step of the preparation method, the press forming treatment is cold isostatic press forming treatment, the pressure is 180-250 MPa (such as 185MPa, 200MPa, 220MPa, 235MPa, 245 MPa), and the holding time is 30-120 min (such as 30min, 40min, 45min, 50min, 60min, 80min, 90min, 105min, 110min, 115min, 120 min).
In the third step of the preparation method, hydrogen is adopted as the atmosphere in the sintering furnace, and the sintering temperature is usually 1200-1450 ℃ (such as 1240 ℃, 1260 ℃, 1280 ℃, 1305 ℃, 1350 ℃, 1385 ℃, 1400 ℃, 1420 ℃, 1445 ℃) and the heat preservation time is 0.5-4 h (such as 1h, 1.5h, 2h, 2.5h, 3h, 3.5h and 4 h).
In the fourth step of the preparation method, the heat treatment after sintering is performed under vacuum, wherein the vacuum degree is lower than 10 -1 Pa (e.g. 10 -1 Pa、5×10 -2 Pa、1×10 -2 Pa、8×10 -3 Pa、5×10 -3 Pa), the temperature of the post-sintering heat treatment is 900-1200 ℃ (such as 950 ℃, 1000 ℃, 1050 ℃, 1100 ℃, 1150 ℃ and 1200 ℃), and the time of the post-sintering heat treatment is 1-8 hours (such as 1.5 hours, 2 hours, 2.5 hours, 3 hours, 4.5 hours, 5 hours, 6 hours, 7 hours, 7.5 hours and 8 hours).
In the fifth step of the above production method, the hot rolling temperature is 600 to 800 ℃ (e.g., 610 ℃, 620 ℃, 630 ℃, 640 ℃, 660 ℃, 680 ℃, 700 ℃, 730 ℃, 750 ℃, 760 ℃, 770 ℃, 780 ℃, 790 ℃ and 800 ℃). The hot rolling heat preservation time is 1-3 h (such as 1h, 1.5h, 2h, 2.5h and 3 h).
In the sixth step of the preparation method, the annealing atmosphere is in a vacuum state, the annealing temperature ranges from 1000 ℃ to 1200 ℃ (for example, 1050 ℃, 1080 ℃, 1100 ℃, 1150 ℃, 1180 ℃ and 1200 ℃), and the annealing time ranges from 1h to 4h (usually 1h, 1.5h, 2h, 2.5h, 3h, 3.5h and 4 h).
The invention is illustrated in further detail by the following examples.
Example 1
Step one, preparing powder
The material design components are 93W3Ni1.5Fe2Co0.5Mn, respectively weighing 61.38Kg of tungsten powder with the Fisher particle size of 3.5 mu m, 1.98Kg of nickel carbonyl powder, 0.99Kg of electrolytic iron powder, 1.32Kg of cobalt powder and 0.33Kg of manganese powder, mixing by a three-dimensional mixer at the rotating speed of 120r/min for 4 hours to obtain 66Kg of tungsten alloy powder mixed with trace cobalt and manganese elements, sieving by a 90-mesh sieve, and using undersize powder.
Step two, cold isostatic pressing forming
And (3) filling the powder in the first step into a die for jolt ramming, then placing the die filled with raw materials into an oil cylinder, and maintaining the pressure for 30min under 180MPa to obtain a plate pressed compact with the relative density of 65%, wherein the size of the formed blank is 589X 18mm.
Step three, sintering treatment
And (3) placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1385 ℃, and the heat preservation is carried out for 3 hours. The dimensions of the sintered blank were 500X 15mm.
Step four: vacuum heat treatment
Vacuum heat treatment is carried out on the sintered blank, the heat treatment temperature is 1100 ℃, and the vacuum degree is 10 -2 Pa, hold time was 3 hours.
Step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 800 ℃, preserving heat for 2 hours, and then carrying out first-pass rolling on the high-specific gravity plate after heat preservation, wherein the processing amount is 12%, and the size of the blank after hot rolling is 500 multiplied by 570 multiplied by 13.2mm;
and (3) primary annealing: annealing the high-specific gravity plate in a vacuum environment after the first rolling, returning to the furnace to heat to 1100 ℃, and preserving heat for 2 hours;
and (3) hot rolling for the second time: after the first annealing, a second pass hot rolling is performed. Placing the blank in a vacuum or argon environment, heating to 700 ℃, preserving heat for 2 hours, and then rolling the preserved blank for the second time; the processing amount was 16.7%. The size of the rolled blank is 500 multiplied by 680 multiplied by 11mm;
and (3) secondary annealing: and carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1100 ℃, and the heat preservation time is 2 hours.
Third hot rolling: the hot rolling temperature is 700 ℃, the heat preservation time is 2 hours, the processing amount is 18.1 percent, and the size of the final high specific gravity plate is 500 multiplied by 830 multiplied by 9mm; the metallographic structure diagram of the obtained tungsten alloy plate is shown in fig. 2.
Example 2
Step one, preparing powder
The material design components are 90W5Ni2.5Fe2.5Co, 141.984Kg of tungsten powder, 7.888Kg of nickel carbonyl powder, 3.944Kg of electrolytic iron powder and 1.32Kg of cobalt powder with the Fisher granularity of 3.2 mu m are respectively weighed, a three-dimensional mixer is used for mixing, the rotating speed is 150r/min, the mixing time is 5h, 66Kg of tungsten alloy powder mixed with trace cobalt elements is obtained, and then a 100-mesh sieve is adopted, and undersize powder is adopted.
Step two, cold isostatic pressing forming
And (3) filling the powder in the first step into a die for jolt ramming, then placing the die filled with raw materials into an oil cylinder, and maintaining the pressure for 50min under the pressure of 200MPa to obtain a plate pressed compact with the relative density of 65%, wherein the size of the formed blank is 683 multiplied by 942 multiplied by 24mm.
Step three, sintering treatment
And (3) placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1350 ℃, and the temperature is kept for 2 hours. The dimensions of the sintered blank were 580X 800X 20mm.
Step four: vacuum heat treatment
And carrying out vacuum heat treatment on the sintered blank, wherein the heat treatment temperature is 1000 ℃, the vacuum degree is 5 multiplied by 10 < -2 > Pa, and the heat preservation time is 4 hours.
Step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 750 ℃, preserving heat for 2.5 hours, then carrying out primary rolling on the high specific gravity plate after heat preservation, wherein the processing amount is 12.6%, and the size of the blank after hot rolling is 580 multiplied by 915 multiplied by 17.5mm;
and (3) primary annealing: annealing the high-specific gravity plate in a vacuum environment after the first rolling, returning to the furnace, heating to 1150 ℃, and preserving heat for 2.5 hours;
and (3) hot rolling for the second time: after the first annealing, a second pass hot rolling is performed. Placing the blank in a vacuum or argon environment, heating to 700 ℃, preserving heat for 3 hours, and then rolling the preserved blank for the second time; the processing amount was 15.37%. The size of the rolled blank is 580 multiplied by 1080 multiplied by 14.81mm;
and (3) secondary annealing: and carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1100 ℃, and the heat preservation time is 2 hours.
Third hot rolling: the hot rolling temperature is 700 ℃, the heat preservation time is 2.5 hours, the processing amount is 16.2 percent, and the final high specific gravity plate size is 580 multiplied by 1290 multiplied by 12.4mm;
example 3
Step one, preparing powder
The material design components are 91W4.6Ni2.4Fe1.5Co0.5Mn, 236.55Kg of tungsten powder, 11.956Kg of nickel carbonyl powder, 6.239Kg of electrolytic iron powder, 3.899Kg of cobalt powder and 1.3Kg of manganese powder with the particle size of 3.0 mu m are respectively weighed, a three-dimensional mixer is used for mixing, the rotating speed is 200r/min, the mixing time is 7h, 259.95Kg of tungsten alloy powder mixed with trace cobalt elements and manganese elements is obtained, and then a 110-mesh sieve is used for sieving, and undersize powder is used.
Step two, cold isostatic pressing forming
And (3) filling the powder obtained in the first step into a die for jolt ramming, then placing the die filled with raw materials into an oil cylinder, and maintaining the pressure for 45min under 235MPa to obtain a plate pressed compact with the relative density of 63%, wherein the size of the formed blank is 706 multiplied by 1177 multiplied by 30mm.
Step three, sintering treatment
And (3) placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1385 ℃, and the heat preservation is carried out for 3 hours. The dimensions of the sintered blank were 600X 1000X 25mm.
Step four: vacuum heat treatment
Vacuum heat treatment is carried out on the sintered blank, the heat treatment temperature is 1200 ℃, and the vacuum degree is 1 multiplied by 10 -2 Pa, incubation time was 4 hours.
Step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 680 ℃, preserving heat for 1.5 hours, then carrying out primary rolling on the high specific gravity plate after heat preservation, wherein the processing amount is 13.1%, and the size of the blank after hot rolling is 600 multiplied by 1150 multiplied by 21.73mm;
and (3) primary annealing: annealing the high-specific gravity plate in a vacuum environment after the first rolling, returning to the furnace to heat to 1100 ℃, and preserving heat for 2 hours;
and (3) hot rolling for the second time: after the first annealing, a second pass hot rolling is performed. Placing the blank in a vacuum or argon environment, heating to 730 ℃, preserving heat for 2 hours, and then rolling the preserved blank for the second time; the processing amount was 15.2%. The size of the rolled blank is 600 multiplied by 1356.48 multiplied by 18.42mm;
and (3) secondary annealing: and carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1150 ℃, and the heat preservation time is 2 hours.
Third hot rolling: the hot rolling temperature is 760 ℃, the heat preservation time is 2.5 hours, the processing amount is 16.8 percent, and the final high specific gravity plate size is 600 multiplied by 1630.79 multiplied by 15.33mm;
example 4
Step one, preparation of tungsten alloy powder
The material design components are 92.5W5Ni2.5Fe, 445.26Kg of tungsten powder with the Fisher particle size of 2.8 mu m, 24.06Kg of carbonyl nickel powder and 12.03Kg of electrolytic iron powder are respectively weighed, a three-dimensional mixer is used for mixing, the rotating speed is 220r/min, the mixing time is 5h, 3446.46Kg of tungsten alloy powder mixed with trace manganese elements is obtained, and then the tungsten alloy powder is sieved by a 120-mesh sieve and undersize powder is used.
Step two, cold isostatic pressing
And (3) filling the powder in the first step into a mould with a mould core, pouring the raw materials, jolt ramming, placing the mould filled with the raw materials into an oil cylinder, and maintaining the pressure at 240MPa for 50min to obtain a formed plate with the relative density of 64%, wherein the size of a formed blank is 765 multiplied by 1412 multiplied by 42mm.
Step three, sintering treatment
And (3) placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1400 ℃, and the temperature is kept for 3 hours. The dimensions of the sintered blank were 650X 1200X 35mm.
Step four: vacuum heat treatment
Vacuum heat treatment is carried out on the sintered blank, the heat treatment temperature is 980 ℃, and the vacuum degree is 8 multiplied by 10 -3 Pa, hold time was 3 hours.
Step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 800 ℃, preserving heat for 2 hours, and then carrying out first-pass rolling on the high-specific gravity plate after heat preservation, wherein the processing amount is 15.2%, and the size of the blank after hot rolling is 650 multiplied by 1415 multiplied by 29.68mm;
and (3) primary annealing: annealing the high-specific gravity plate in a vacuum environment after the first rolling, returning to the furnace to heat to 1100 ℃, and preserving heat for 2 hours;
and (3) hot rolling for the second time: after the first annealing, a second pass hot rolling is performed. Placing the blank in a vacuum or argon environment, heating to 700 ℃, preserving heat for 2 hours, and then rolling the preserved blank for the second time; the processing amount was 16%. The size of the rolled blank is 650 multiplied by 1685 multiplied by 24.93mm;
and (3) secondary annealing: and carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1100 ℃, and the heat preservation time is 2 hours.
Third hot rolling: the hot rolling temperature is 700 ℃, the heat preservation time is 2 hours, the processing amount is 17%, and the size of the final high specific gravity plate is 680 multiplied by 2029 multiplied by 20.7mm;
example 5
Example 5 the procedure and parameters were the same as in example 1 except that no cobalt powder was added during the preparation of the high specific gravity powder of step one.
Example 6
Example 6 the procedure and parameters were the same as in example 4 except that manganese powder was added during the preparation of the tungsten alloy powder in step one.
The following table is a table of the mechanical properties of the physical samples of the high specific gravity sheet material prepared in examples 5, 6.
In conclusion, the high-strength high-specific gravity alloy plate rolled by the method has the advantages that the size of the finally obtained high-specific gravity plate is increased, the mechanical property is enhanced, the mechanical property is obviously improved mainly in the aspects of material strength and elongation, the preparation cost is reduced, and further the cost is saved.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (4)
1. The preparation method of the high-strength high-specific gravity alloy plate is characterized by comprising the following steps:
step one, preparing powder
The material design components are 93W3Ni1.5Fe2Co0.5Mn, respectively weighing 61.38Kg of tungsten powder with the Fisher particle size of 3.5 mu m, 1.98Kg of nickel carbonyl powder, 0.99Kg of electrolytic iron powder, 1.32Kg of cobalt powder and 0.33Kg of manganese powder, mixing by a three-dimensional mixer at the rotating speed of 120r/min for 4 hours to obtain 66Kg of tungsten alloy powder mixed with trace cobalt and manganese elements, sieving by a 90-mesh sieve, and using undersize powder;
step two, cold isostatic pressing forming
Filling the powder in the first step into a die for jolt ramming, then placing the die filled with raw materials into an oil cylinder, and maintaining the pressure for 30min under 180MPa to obtain a plate pressed compact with the relative density of 65%, wherein the size of the formed blank is 589X 18mm;
step three, sintering treatment
Placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1385 ℃, the heat preservation is carried out for 3 hours, and the size of the sintered blank is 500 multiplied by 15mm;
step four: vacuum heat treatment
Vacuum heat treatment is carried out on the sintered blank, the heat treatment temperature is 1100 ℃, and the vacuum degree is 10 -2 Pa, and keeping the temperature for 3 hours;
step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 800 ℃, preserving heat for 2 hours, then carrying out primary rolling on the preserved blank, wherein the processing amount is 12%, and the size of the hot rolled blank is 500 multiplied by 570 multiplied by 13.2mm;
and (3) primary annealing: annealing the blank in a vacuum environment after the first rolling, returning to the furnace to heat to 1100 ℃, and preserving heat for 2 hours;
and (3) hot rolling for the second time: after the primary annealing, carrying out the second-pass hot rolling, putting the blank in a vacuum or argon environment, heating to 700 ℃, preserving heat for 2 hours, and then carrying out the second rolling on the blank after the heat preservation, wherein the processing amount is 16.7%, and the size of the blank after the rolling is 500 multiplied by 680 multiplied by 11mm;
and (3) secondary annealing: carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1100 ℃, and the heat preservation time is 2 hours;
third hot rolling: the hot rolling temperature was 700℃and the holding time was 2 hours, the working amount was 18.1% and the final sheet size was 500X 830X 9mm.
2. The preparation method of the high-strength high-specific gravity alloy plate is characterized by comprising the following steps:
step one, preparing powder
The material design components are 90W5Ni2.5Fe2.5Co, 141.984Kg of tungsten powder with the Fisher particle size of 3.2 mu m, 7.888Kg of nickel carbonyl powder, 3.944Kg of electrolytic iron powder and 1.32Kg of cobalt powder are respectively weighed, a three-dimensional mixer is used for mixing, the rotating speed is 150r/min, the mixing time is 5h, 66Kg of tungsten alloy powder mixed with trace cobalt elements is obtained, and then a 100-mesh sieve is adopted, and undersize powder is used;
step two, cold isostatic pressing forming
Filling the powder in the first step into a die for jolt ramming, then placing the die filled with raw materials into an oil cylinder, and maintaining the pressure for 50min under 200MPa to obtain a plate pressed compact with the relative density of 65%, wherein the size of the formed blank is 683 multiplied by 942 multiplied by 24mm;
step three, sintering treatment
Placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1350 ℃, the heat preservation is carried out for 2 hours, and the size of the sintered blank is 580 multiplied by 800 multiplied by 20mm;
step four: vacuum heat treatment
Carrying out vacuum heat treatment on the sintered blank, wherein the heat treatment temperature is 1000 ℃, the vacuum degree is 5 multiplied by 10 < -2 > Pa, and the heat preservation time is 4 hours;
step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 750 ℃, preserving heat for 2.5 hours, then carrying out primary rolling on the preserved blank, wherein the processing amount is 12.6%, and the size of the hot rolled blank is 580 multiplied by 915 multiplied by 17.5mm;
and (3) primary annealing: annealing the blank in a vacuum environment after the first rolling, returning to the furnace, heating to 1150 ℃, and preserving heat for 2.5 hours;
and (3) hot rolling for the second time: after the first annealing, carrying out second-pass hot rolling; placing the blank in a vacuum or argon environment, heating to 700 ℃, preserving heat for 3 hours, and then rolling the preserved blank for the second time; the processing amount is 15.37 percent, and the size of the rolled blank is 580 multiplied by 1080 multiplied by 14.81mm;
and (3) secondary annealing: carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1100 ℃, and the heat preservation time is 2 hours;
third hot rolling: the hot rolling temperature is 700 ℃, the heat preservation time is 2.5 hours, the processing amount is 16.2 percent, and the final plate size is 580 multiplied by 1290 multiplied by 12.4mm.
3. The preparation method of the high-strength high-specific gravity alloy plate is characterized by comprising the following steps:
step one, preparing powder
The material design components are 91W4.6Ni2.4Fe1.5Co0.5Mn, 236.55Kg of tungsten powder, 11.956Kg of nickel carbonyl powder, 6.239Kg of electrolytic iron powder, 3.899Kg of cobalt powder and 1.3Kg of manganese powder are respectively weighed, a three-dimensional mixer is used for mixing, the rotating speed is 200r/min, the mixing time is 7h, 259.95Kg of tungsten alloy powder mixed with trace cobalt elements and manganese elements is obtained, and then a 110-mesh sieve is adopted, and undersize powder is used;
step two, cold isostatic pressing forming
Filling the powder in the first step into a die for jolt ramming, then placing the die filled with raw materials into an oil cylinder, and maintaining the pressure for 45min under 235MPa to obtain a plate pressed compact with the relative density of 63%, wherein the size of the formed blank is 706 multiplied by 1177 multiplied by 30mm;
step three, sintering treatment
Placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1385 ℃, the heat preservation is carried out for 3 hours, and the size of the sintered blank is 600 multiplied by 1000 multiplied by 25mm;
step four: vacuum heat treatment
Vacuum heat treatment is carried out on the sintered blank, the heat treatment temperature is 1200 ℃, and the vacuum degree is 1 multiplied by 10 -2 Pa, and keeping the temperature for 4 hours;
step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 680 ℃, preserving heat for 1.5 hours, then carrying out primary rolling on the preserved blank, wherein the processing amount is 13.1%, and the size of the hot rolled blank is 600 multiplied by 1150 multiplied by 21.73mm;
and (3) primary annealing: annealing the blank in a vacuum environment after the first rolling, returning to the furnace to heat to 1100 ℃, and preserving heat for 2 hours;
and (3) hot rolling for the second time: after the first annealing, carrying out second-pass hot rolling, placing the blank in a vacuum or argon environment, heating to 730 ℃, preserving heat for 2 hours, and then carrying out second rolling on the preserved blank; the processing amount is 15.2 percent, and the size of the rolled blank is 600 multiplied by 1356.48 multiplied by 18.42mm;
and (3) secondary annealing: carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1150 ℃, and the heat preservation time is 2 hours;
third hot rolling: the hot rolling temperature was 760℃and the holding time was 2.5 hours, the working amount was 16.8%, and the final sheet size was 600X 1630.79X 15.33mm.
4. The preparation method of the high-strength high-specific gravity alloy plate is characterized by comprising the following steps:
step one, preparation of tungsten alloy powder
The material design components are 92.5W5Ni2.5Fe, 445.26Kg of tungsten powder with the Fisher particle size of 2.8 mu m, 24.06Kg of carbonyl nickel powder and 12.03Kg of electrolytic iron powder are respectively weighed, a three-dimensional mixer is used for mixing, the rotating speed is 220r/min, the mixing time is 5h, 3446.46Kg of tungsten alloy powder mixed with trace manganese elements is obtained, and then the tungsten alloy powder is sieved by a 120-mesh sieve and undersize powder is used;
step two, cold isostatic pressing
Filling the powder in the first step into a mould with a mould core, pouring the raw materials, jolt ramming, then placing the mould filled with the raw materials into an oil cylinder, and maintaining the pressure at 240MPa for 50min to obtain a formed plate with the relative density of 64%, wherein the size of a formed blank is 765 multiplied by 1412 multiplied by 42mm;
step three, sintering treatment
Placing the pressed compact in the second step into a furnace for sintering treatment, wherein the sintering atmosphere is hydrogen, the sintering maximum temperature is 1400 ℃, the heat preservation is carried out for 3 hours, and the size of the sintered blank is 650 multiplied by 1200 multiplied by 35mm;
step four: vacuum heat treatment
Vacuum heat treatment is carried out on the sintered blank, the heat treatment temperature is 980 ℃, and the vacuum degree is 8 multiplied by 10 -3 Pa, and keeping the temperature for 3 hours;
step five, six: hot rolling and annealing treatment
And (3) hot rolling for the first time: placing the blank in a vacuum or argon environment, heating to 800 ℃, preserving heat for 2 hours, and then carrying out primary rolling on the preserved blank, wherein the processing amount is 15.2%, and the size of the hot rolled blank is 650 multiplied by 1415 multiplied by 29.68mm;
and (3) primary annealing: annealing the blank in a vacuum environment after the first rolling, returning to the furnace to heat to 1100 ℃, and preserving heat for 2 hours;
and (3) hot rolling for the second time: after the first annealing, carrying out second-pass hot rolling, placing the blank in a vacuum or argon environment, heating to 700 ℃, preserving heat for 2 hours, and then carrying out second rolling on the preserved blank; the processing amount is 16 percent, and the size of the rolled blank is 650 multiplied by 1685 multiplied by 24.93mm;
and (3) secondary annealing: carrying out secondary vacuum annealing treatment, wherein the annealing temperature is 1100 ℃, and the heat preservation time is 2 hours;
third hot rolling: the hot rolling temperature was 700℃and the holding time was 2 hours, the working amount was 17%, and the final sheet size was 680X 2029X 20.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110312511.7A CN115194155B (en) | 2021-03-24 | 2021-03-24 | High-strength high-specific gravity alloy plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110312511.7A CN115194155B (en) | 2021-03-24 | 2021-03-24 | High-strength high-specific gravity alloy plate and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115194155A CN115194155A (en) | 2022-10-18 |
| CN115194155B true CN115194155B (en) | 2024-02-06 |
Family
ID=83571046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110312511.7A Active CN115194155B (en) | 2021-03-24 | 2021-03-24 | High-strength high-specific gravity alloy plate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115194155B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380614A (en) * | 2011-11-11 | 2012-03-21 | 西安瑞福莱钨钼有限公司 | Method for preparing tungsten-nickel-iron alloy thin plate |
| CN108315624A (en) * | 2018-01-09 | 2018-07-24 | 安泰天龙钨钼科技有限公司 | A kind of High Performance W alloy bar material and preparation method thereof |
-
2021
- 2021-03-24 CN CN202110312511.7A patent/CN115194155B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380614A (en) * | 2011-11-11 | 2012-03-21 | 西安瑞福莱钨钼有限公司 | Method for preparing tungsten-nickel-iron alloy thin plate |
| CN108315624A (en) * | 2018-01-09 | 2018-07-24 | 安泰天龙钨钼科技有限公司 | A kind of High Performance W alloy bar material and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 武杰 ; 孙毅 ; 王晖 ; .烧结和热处理对WNiFe合金板材轧制性能的影响.热加工工艺.2016,第45卷(第20期),第239-241页. * |
| 烧结和热处理对WNiFe合金板材轧制性能的影响;武杰;孙毅;王晖;;热加工工艺;第45卷(第20期);第239-241页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115194155A (en) | 2022-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108315624B (en) | High-performance tungsten alloy bar and preparation method thereof | |
| CN108103381B (en) | High-strength FeCoNiCrMn high-entropy alloy and preparation method thereof | |
| CN108145157B (en) | Preparation method of high-performance molybdenum-rhenium alloy bar | |
| CN110373561B (en) | Method for preparing high-density fine-grain titanium alloy through powder forging | |
| CN101403058B (en) | Low cost alpha and beta type titan alloy | |
| CN102568738B (en) | Manufacturing method of high-mechanical-strength sintered neodymium iron boron permanent magnets | |
| JP2014500611A (en) | High corrosion resistance sintered NdFeB magnet and method for preparing the same | |
| CN105063394A (en) | Titanium or titanium alloy material preparing method | |
| CN104015009A (en) | Method for manufacturing middle frames and rear covers of mobile phones | |
| CN107557704A (en) | A kind of hot forming dies materials and preparation method thereof | |
| CN112404420B (en) | High-strength steel powder for 3D printing, preparation method thereof, 3D printing method and prepared high-strength steel | |
| CN110238401A (en) | A kind of method that powder rolling prepares high-compactness Fine Grain Ti Alloy | |
| CN113462942A (en) | Preparation method of high-yield tungsten alloy material | |
| CN107513653A (en) | High-specific gravity tungsten alloy ultra thin plate and preparation method thereof | |
| CN102628114B (en) | Vacuum copper-based electrical contact composite material containing ceramic phase and preparation method of vacuum copper-based electrical contact composite material | |
| CN112662930A (en) | High-entropy die steel material and preparation method thereof | |
| CN115194155B (en) | High-strength high-specific gravity alloy plate and preparation method thereof | |
| CN108183010A (en) | Method that is a kind of while improving neodymium ferrocerium boron sintered magnet magnetic property and corrosion resistance | |
| CN108305771A (en) | A kind of preparation method of low brittleness neodymium-iron-boron magnetic material | |
| CN111519079B (en) | CoCrNiCuFeMnAl high-entropy alloy and preparation method thereof | |
| CN105185562A (en) | Preparation method of sintered neodymium-iron-boron magnet | |
| CN110983152B (en) | Fe-Mn-Si-Cr-Ni based shape memory alloy and preparation method thereof | |
| CN113652594B (en) | Refractory metal-based alloy and preparation method thereof | |
| DE2144560C2 (en) | Method for manufacturing iron-manganese sintered magnets | |
| CN109545491B (en) | Neodymium-iron-boron permanent magnet material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |