CN113308616A - Light high-strength hard alloy material and preparation method thereof - Google Patents
Light high-strength hard alloy material and preparation method thereof Download PDFInfo
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- CN113308616A CN113308616A CN202110500220.0A CN202110500220A CN113308616A CN 113308616 A CN113308616 A CN 113308616A CN 202110500220 A CN202110500220 A CN 202110500220A CN 113308616 A CN113308616 A CN 113308616A
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- 239000000956 alloy Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 15
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 13
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 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 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 10
- 239000010955 niobium Substances 0.000 claims abstract description 10
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 33
- 238000000498 ball milling Methods 0.000 claims description 30
- 239000003607 modifier Substances 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 9
- 238000005984 hydrogenation reaction Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 238000010902 jet-milling Methods 0.000 claims description 3
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- -1 titanium hydride Chemical compound 0.000 claims description 3
- 229910000048 titanium hydride Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010791 quenching Methods 0.000 abstract description 2
- 230000000171 quenching effect Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 2
- 238000007373 indentation Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
-
- B22F1/0003—
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/921—Titanium carbide
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention belongs to the technical field of material preparation, and discloses a light high-strength hard alloy material and a preparation method thereof, wherein the light high-strength hard alloy material comprises, by mass, 6-8 parts of titanium, 1-2 parts of carbon, 3-6 parts of zirconium, 2-5 parts of silicon, 1-4 parts of copper, 2-3 parts of nickel, 2-3 parts of manganese, 1-2 parts of iron, 1-2 parts of niobium and 1-3 parts of chromium. The light high-strength hard alloy material provided by the invention has the advantages of reasonable raw material proportion, small production control difficulty and low production cost, and is beneficial to reducing the material preparation cost; in the preparation of the light high-strength hard alloy material, carbon is one of effective strengthening elements for ensuring the alloy material to obtain high strength and high hardness, the strength and the hardness of steel can be obviously improved, ferrite can be prevented from appearing in a quenching structure, and the produced high-strength alloy has high hardness and light weight and can meet the diversified demands of the market.
Description
Technical Field
The invention belongs to the technical field of material preparation, and particularly relates to a light high-strength hard alloy material and a preparation method thereof.
Background
At present, TiC-based hard alloy has the advantages of high hardness, high wear resistance, small friction coefficient, high oxidation resistance, high heat resistance and high chemical stability. But the plastic deformation resistance, the brittle fracture resistance, the thermal conductivity and the like of the wear-resistant material are poor, and the wear resistance of the wear-resistant material is also low. Therefore, the application is not as extensive as that of WC-based cemented carbide. Although TiC-based hard alloy is used as a tool material, is suitable for high-speed cutting and dry cutting of cast iron, common steel and high-hardness steel, and has better performance than that of a common hard alloy tool in certain processing occasions, the service life of the tool is hardly equal to that of the hard alloy tool at all, particularly the TiC-based hard alloy tool has unsatisfactory wear resistance and service life, and cannot meet market requirements.
Through the above analysis, the problems and defects of the prior art are as follows: the existing TiC-based hard alloy cutter has unsatisfactory wear resistance and service life and cannot meet the market demand.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a light high-strength hard alloy material and a preparation method thereof.
The light high-strength hard alloy material comprises, by mass, 6-8 parts of titanium, 1-2 parts of carbon, 3-6 parts of zirconium, 2-5 parts of silicon, 1-4 parts of copper, 2-3 parts of nickel, 2-3 parts of manganese, 1-2 parts of iron, 1-2 parts of niobium and 1-3 parts of chromium.
Another object of the present invention is to provide a method for preparing a lightweight high-strength cemented carbide material, which comprises the following steps:
step one, preparing titanium powder and preparing titanium carbide by using the prepared titanium powder and carbon powder: carrying out vacuum dehydrogenation on titanium hydride, and then carrying out jet milling treatment under the argon pressure condition to obtain high-purity titanium powder; weighing 6-8 parts of high-purity titanium powder and 1-2 parts of carbon powder in parts by mass, and grinding the titanium powder and the carbon powder respectively to obtain titanium powder with uniform particle size and carbon powder with uniform particle size; mixing titanium powder and carbon powder, uniformly stirring, and carrying out reduced pressure forming to obtain a compound; placing the compound in a graphite container, and carrying out hydrogenation treatment under the condition of high temperature and high purity hydrogen pressure to obtain titanium carbide;
modifying titanium carbide by using a modifier to obtain modified titanium carbide: fully grinding the prepared titanium carbide in a grinder to obtain small-particle-size titanium carbide; mixing methyltrimethoxysilane and methacryloxypropyltrimethoxysilane, uniformly stirring, and performing ultrasonic dispersion to obtain a modifier; mixing the small-particle-size titanium carbide and a modifier, immersing the modifier, heating and stirring to obtain a modified mixed solution after heating is finished; placing the modified mixed solution in a centrifuge for centrifugation, and collecting solid substances, namely modified titanium carbide;
step three, pretreating the light high-strength hard alloy material raw material: weighing zirconium, silicon, copper, nickel, manganese, iron, niobium and chromium according to the mass parts, mixing, and placing in a ball mill; adding an ethanol solution into a ball mill, uniformly stirring, and carrying out primary ball milling; after the first ball milling is finished, adding modified titanium carbide into the ball mill, adding zirconium balls, carrying out second ball milling, and collecting ball milling products to obtain a processed light high-strength hard alloy material raw material;
step four, preparing the light high-strength hard alloy material by using the treated light high-strength hard alloy material raw material: putting the light high-strength hard alloy material into a die, and performing high-pressure compression molding to obtain a blank; injecting lithium fluoride into the mold to modify the blank to obtain a modified blank; and sintering the modified blank under the vacuum high-temperature condition, cooling and deflating the mold after sintering is finished, and cooling to room temperature to obtain a finished product of the light high-strength hard alloy material.
Further, in the first step, the temperature of vacuum dehydrogenation is 600-700 ℃, and the vacuum dehydrogenation time is 2-6 h.
Further, in the first step, the pressure of the jet mill treatment is 0.3-0.7 MPa, and the treatment time is 3-4 h.
Further, in the first step, the temperature of the hydrogenation treatment is 850-1200 ℃, and the pressure of the hydrogenation treatment is 0.1-0.3 MPa.
Further, in the second step, the frequency of ultrasonic dispersion is 50-60 kHz, and the time of ultrasonic dispersion is 20-25 min.
Further, in the second step, the heating temperature is 55-70 ℃, and the heating time is 2-4 hours.
Further, in the third step, the volume concentration of the ethanol solution is 75%.
Further, in the third step, the ball milling pressure of the first ball milling is 50-60N, and the ball milling time is 20-30 min.
Further, in the third step, the ball milling pressure of the second ball milling is 50-80N, and the ball milling time is 10-20 min.
By combining all the technical schemes, the invention has the advantages and positive effects that: the light high-strength hard alloy material provided by the invention has the advantages of reasonable raw material proportion, small production control difficulty and low production cost, and is beneficial to reducing the material preparation cost; in the preparation of the light high-strength hard alloy material, carbon is one of effective strengthening elements for ensuring the alloy material to obtain high strength and high hardness, the strength and the hardness of steel can be obviously improved, ferrite is prevented from appearing in a quenching structure, and the produced high-strength alloy has high hardness and light weight and can meet the diversified demands of the market.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a flow chart of a method for preparing a lightweight high-strength cemented carbide material according to an embodiment of the present invention.
Fig. 2 is a flow chart of the preparation of titanium powder and the preparation of titanium carbide using the prepared titanium powder and carbon powder according to the embodiment of the present invention.
FIG. 3 is a flow chart of a process for modifying titanium carbide with a modifier to obtain modified titanium carbide according to an embodiment of the present invention.
Fig. 4 is a flow chart of a pretreatment process for preparing a lightweight high-strength cemented carbide raw material according to an embodiment of the present invention.
Fig. 5 is a flowchart of a process for preparing a lightweight high-strength cemented carbide material using a processed lightweight high-strength cemented carbide material raw material according to an embodiment of the present invention.
FIG. 6 is a metallographic photograph showing hardness indentations and cracks of a sample of a lightweight high-strength cemented carbide material prepared in example 1 according to the present invention;
FIG. 7 is a metallographic image of microhardness indentations and cracks of a sample of a lightweight high strength cemented carbide material prepared in example 2 of the present invention;
FIG. 8 is a scanning electron microscope photograph of the fracture surface of the light high-strength cemented carbide material of the sample prepared in the embodiment 3 of the invention;
FIG. 9 is a scanning electron microscope photograph of fracture surface of the sample of lightweight high strength cemented carbide material prepared in example 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a light high-strength hard alloy material and a preparation method thereof, and the invention is described in detail below with reference to the accompanying drawings.
The light high-strength hard alloy material provided by the embodiment of the invention comprises, by mass, 6-8 parts of titanium, 1-2 parts of carbon, 3-6 parts of zirconium, 2-5 parts of silicon, 1-4 parts of copper, 2-3 parts of nickel, 2-3 parts of manganese, 1-2 parts of iron, 1-2 parts of niobium and 1-3 parts of chromium.
As shown in fig. 1, a method for preparing a lightweight high-strength cemented carbide material provided by an embodiment of the present invention includes the following steps:
s101, preparing titanium powder and preparing titanium carbide by using the prepared titanium powder and carbon powder;
s102, modifying titanium carbide by using a modifier to obtain modified titanium carbide;
s103, pretreating the raw material of the light high-strength hard alloy material;
and S104, preparing the light high-strength hard alloy material by using the treated light high-strength hard alloy material raw material.
As shown in fig. 2, the preparation of titanium powder and the preparation of titanium carbide using the prepared titanium powder and carbon powder according to the embodiment of the present invention include:
s201, carrying out vacuum dehydrogenation on titanium hydride, and then carrying out jet milling treatment under the argon pressure condition to obtain high-purity titanium powder;
s202, weighing 6-8 parts of high-purity titanium powder and 1-2 parts of carbon powder in parts by mass, and grinding the titanium powder and the carbon powder respectively to obtain titanium powder with uniform particle size and carbon powder with uniform particle size;
s203, mixing titanium powder and carbon powder, uniformly stirring, and carrying out reduced pressure forming to obtain a compound;
and S204, placing the composite in a graphite container, and carrying out hydrogenation treatment under the condition of high temperature and high purity hydrogen pressure to obtain titanium carbide.
In step S201, the temperature of the vacuum dehydrogenation provided by the embodiment of the present invention is 600 to 700 ℃, and the vacuum dehydrogenation time is 2 to 6 hours.
In step S201, the pressure of the jet mill treatment provided by the embodiment of the present invention is 0.3 to 0.7MPa, and the treatment time is 3 to 4 hours.
In step S204, the temperature of the hydrotreating provided by the embodiment of the invention is 850-1200 ℃, and the pressure of the hydrotreating is 0.1-0.3 MPa.
As shown in fig. 3, an embodiment of the present invention provides a modified titanium carbide obtained by modifying titanium carbide with a modifier, including:
s301, fully grinding the prepared titanium carbide in a grinder to obtain small-particle-size titanium carbide;
s302, mixing methyltrimethoxysilane and methacryloxypropyltrimethoxysilane, uniformly stirring, and performing ultrasonic dispersion to obtain a modifier;
s303, mixing the small-particle-size titanium carbide and the modifier, immersing the modifier, heating and stirring to obtain a modified mixed solution after heating is finished;
s304, placing the modified mixed solution in a centrifuge for centrifugation, and collecting solid substances, namely the modified titanium carbide.
In step S202, the ultrasonic dispersion frequency provided by the embodiment of the invention is 50-60 kHz, and the ultrasonic dispersion time is 20-25 min.
In step S203, the heating temperature provided by the embodiment of the present invention is 55 to 70 ℃, and the heating time is 2 to 4 hours.
As shown in fig. 4, the pretreatment of the lightweight high-strength cemented carbide raw material according to the embodiment of the present invention includes:
s401, weighing zirconium, silicon, copper, nickel, manganese, iron, niobium and chromium according to parts by mass, mixing, and placing in a ball mill;
s402, adding an ethanol solution into a ball mill, uniformly stirring, and carrying out primary ball milling;
and S403, adding modified titanium carbide into the ball mill after the first ball milling is finished, adding zirconium balls, carrying out second ball milling, and collecting ball milling products to obtain the processed light high-strength hard alloy material raw material.
In step S402, the ethanol solution provided by the embodiment of the present invention has a volume concentration of 75%.
In step S402, the ball milling pressure of the first ball milling provided by the embodiment of the present invention is 50 to 60N, and the ball milling time is 20 to 30 min.
In step S403, the ball milling pressure of the second ball milling provided by the embodiment of the invention is 50 to 80N, and the ball milling time is 10 to 20 min.
As shown in fig. 5, the preparation of the lightweight high-strength cemented carbide material using the processed lightweight high-strength cemented carbide material raw material according to the embodiment of the present invention includes:
s501, putting the light high-strength hard alloy material into a mold, and performing high-pressure compression molding to obtain a blank;
s502, injecting lithium fluoride into the mold to modify the blank to obtain a modified blank;
s503, sintering the modified blank under the vacuum high-temperature condition, cooling and deflating the mold after sintering is finished, and cooling to room temperature to obtain a finished product of the light high-strength hard alloy material.
The technical solution of the present invention is further described with reference to the following specific examples.
Example 1
The light high-strength hard alloy material comprises, by mass, 6 parts of titanium, 1 part of carbon, 3 parts of zirconium, 2 parts of silicon, 1 part of copper, 2 parts of nickel, 2 parts of manganese, 1 part of iron, 1 part of niobium and 1 part of chromium.
Example 2
The light high-strength hard alloy material comprises, by mass, 8 parts of titanium, 2 parts of carbon, 6 parts of zirconium, 5 parts of silicon, 4 parts of copper, 3 parts of nickel, 3 parts of manganese, 2 parts of iron, 2 parts of niobium and 3 parts of chromium.
Example 3
The light high-strength hard alloy material comprises, by mass, 7 parts of titanium, 1.5 parts of carbon, 4.5 parts of zirconium, 3.5 parts of silicon, 2.5 parts of copper, 2.5 parts of nickel, 2.5 parts of manganese, 1.5 parts of iron, 1.5 parts of niobium and 2 parts of chromium.
The positive effects of the present invention are further described below in conjunction with experimental data.
The properties of the light high-strength hard alloy material of the invention are shown in Table 1. TABLE 1 Properties of samples obtained in examples 1-3
FIG. 6 is a metallographic photograph showing hardness indentations and cracks of a sample of a lightweight high-strength cemented carbide material prepared in example 1 according to the present invention;
FIG. 7 is a metallographic image of microhardness indentations and cracks of a sample of a lightweight high strength cemented carbide material prepared in example 2 of the present invention;
FIG. 8 is a scanning electron microscope photograph of the fracture surface of the light high-strength cemented carbide material of the sample prepared in the embodiment 3 of the invention;
FIG. 9 is a scanning electron microscope photograph of fracture surface of the sample of lightweight high strength cemented carbide material prepared in example 3 of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. The preparation method of the light high-strength hard alloy material is characterized by comprising the following steps of:
step one, preparing titanium powder and preparing titanium carbide by using the prepared titanium powder and carbon powder: carrying out vacuum dehydrogenation on titanium hydride, and then carrying out jet milling treatment under the argon pressure condition to obtain high-purity titanium powder; weighing 6-8 parts of high-purity titanium powder and 1-2 parts of carbon powder in parts by mass, and grinding the titanium powder and the carbon powder respectively to obtain titanium powder with uniform particle size and carbon powder with uniform particle size; mixing titanium powder and carbon powder, uniformly stirring, and carrying out reduced pressure forming to obtain a compound; placing the compound in a graphite container, and carrying out hydrogenation treatment under the condition of high temperature and high purity hydrogen pressure to obtain titanium carbide;
modifying titanium carbide by using a modifier to obtain modified titanium carbide: fully grinding the prepared titanium carbide in a grinder to obtain small-particle-size titanium carbide; mixing methyltrimethoxysilane and methacryloxypropyltrimethoxysilane, uniformly stirring, and performing ultrasonic dispersion to obtain a modifier; mixing the small-particle-size titanium carbide and a modifier, immersing the modifier, heating and stirring to obtain a modified mixed solution after heating is finished; placing the modified mixed solution in a centrifuge for centrifugation, and collecting solid substances, namely modified titanium carbide;
step three, pretreating the light high-strength hard alloy material raw material: weighing zirconium, silicon, copper, nickel, manganese, iron, niobium and chromium according to the mass parts, mixing, and placing in a ball mill; adding an ethanol solution into a ball mill, uniformly stirring, and carrying out primary ball milling; after the first ball milling is finished, adding modified titanium carbide into the ball mill, adding zirconium balls, carrying out second ball milling, and collecting ball milling products to obtain a processed light high-strength hard alloy material raw material;
step four, preparing the light high-strength hard alloy material by using the treated light high-strength hard alloy material raw material: putting the light high-strength hard alloy material into a die, and performing high-pressure compression molding to obtain a blank; injecting lithium fluoride into the mold to modify the blank to obtain a modified blank; and sintering the modified blank under the vacuum high-temperature condition, cooling and deflating the mold after sintering is finished, and cooling to room temperature to obtain a finished product of the light high-strength hard alloy material.
2. The method for preparing the light-weight high-strength hard alloy material according to claim 1, wherein in the first step, the temperature of the vacuum dehydrogenation is 600-700 ℃, and the time of the vacuum dehydrogenation is 2-6 h.
3. The method for preparing the light-weight high-strength hard alloy material according to claim 1, wherein in the first step, the pressure of the jet mill treatment is 0.3-0.7 MPa, and the treatment time is 3-4 h.
4. The method for preparing a lightweight high-strength cemented carbide material according to claim 1, wherein in the first step, the temperature of the hydrogenation treatment is 850 to 1200 ℃, and the pressure of the hydrogenation treatment is 0.1 to 0.3 MPa.
5. The method for preparing the light-weight high-strength hard alloy material according to claim 1, wherein in the second step, the ultrasonic dispersion frequency is 50-60 kHz, and the ultrasonic dispersion time is 20-25 min.
6. The method for preparing the light-weight high-strength hard alloy material according to claim 1, wherein in the second step, the heating temperature is 55-70 ℃ and the heating time is 2-4 h.
7. The method for preparing the light-weight high-strength hard alloy material according to claim 1, wherein in the third step, the volume concentration of the ethanol solution is 75%.
8. The preparation method of the light-weight high-strength hard alloy material according to claim 1, wherein in the third step, the ball milling pressure of the first ball milling is 50-60N, and the ball milling time is 20-30 min.
9. The preparation method of the light-weight high-strength hard alloy material according to claim 1, wherein in the third step, the ball milling pressure of the second ball milling is 50-80N, and the ball milling time is 10-20 min.
10. The light high-strength hard alloy material is characterized by comprising 6-8 parts of titanium, 1-2 parts of carbon, 3-6 parts of zirconium, 2-5 parts of silicon, 1-4 parts of copper, 2-3 parts of nickel, 2-3 parts of manganese, 1-2 parts of iron, 1-2 parts of niobium and 1-3 parts of chromium in parts by mass.
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