CN114603135A - Hybrid reinforced powder metallurgy titanium-based composite material and preparation method thereof - Google Patents
Hybrid reinforced powder metallurgy titanium-based composite material and preparation method thereof Download PDFInfo
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- 239000010936 titanium Substances 0.000 title claims abstract description 46
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 43
- 230000008569 process Effects 0.000 claims abstract description 27
- 238000005245 sintering Methods 0.000 claims abstract description 27
- 229910000048 titanium hydride Inorganic materials 0.000 claims abstract description 21
- 238000001192 hot extrusion Methods 0.000 claims abstract description 18
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 14
- 239000011812 mixed powder Substances 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000003064 anti-oxidating effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical group [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 7
- 239000013078 crystal Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000000280 densification Methods 0.000 abstract description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 5
- 238000007670 refining Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000875 high-speed ball milling Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
-
- 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
-
- 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
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/10—Refractory metals
- C22C49/11—Titanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- 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
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a hybrid reinforced powder metallurgy titanium-based composite material and a preparation method thereof; the preparation method comprises the following steps: mix TiH2Powder and B4C, uniformly mixing the powder; forming the blank into a green body by a hydraulic press; then placing the mixture into a vacuum sintering furnace to complete dehydrogenation and sintering; further densification is finished through a hot extrusion process after the sheath is sealed,finally obtaining the high-performance Ti/(TiB + TiC) titanium-based composite material. The titanium-based composite material prepared by the method selects low-cost TiH2As raw materials, the preparation cost of the titanium-based composite material can be greatly reduced; the composite material tissue consists of an isometric crystal alpha titanium matrix, fibrous TiB and granular TiC which are uniformly distributed, has compactness of 99.9 percent and excellent strong-plasticity matching, and has the yield strength of 537-683 MPa at room temperature, the tensile strength of 653-851 MPa and the elongation percentage after fracture of 15-34 percent.
Description
Technical Field
The invention belongs to the technical field of metal matrix composite preparation, and particularly relates to a hybrid reinforced powder metallurgy titanium matrix composite and a preparation method thereof.
Background
Titanium and titanium alloys are widely used in the fields of aerospace, biomedical, energy, chemical engineering and the like due to their characteristics of high specific strength, good corrosion resistance, excellent biocompatibility and the like. However, titanium is easily contaminated by hydrogen, oxygen and nitrogen, and the processing process usually requires atmosphere protection, so that the processing cost is high, the processing period is long, the machinability is poor, and the cutting efficiency is low, so that titanium and titanium alloy are greatly limited in practical application. Therefore, the process flow of reducing the production cost of titanium and titanium alloy and exploring more simply and conveniently is one of the important exploration directions of the relevant research of titanium and titanium alloy.
TiH2The powder is used as an intermediate product of a hydrogenation dehydrogenation method, has lower cost, and is TiH at present2The market price of the powder is about half of that of pure titanium powder with the same grain diameter and similar impurity content. TiH2The hydrogen element in the powder can be used as a temporary alloy element to induce phase transformation and refine grains, thereby improving the mechanical property. Of further importance is the use of TiH2Sintering instead of HDH-Ti powders results in faster shrinkage and densification, resulting in sintered parts of higher relative density.
In addition, as the actual working conditions are more and more complex, the requirements on the performance of parts are higher and higher, and particularly under the working environment with severe friction and wear, the titanium and the titanium alloy are difficult to meet the actual performance requirements gradually. The particle reinforced titanium-based composite material has better wear resistance, higher strength, hardness and stability, can adapt to more complex working environment, and has wider application prospect. The in-situ generated particle reinforced composite material has the advantages of simple process, low cost, uniform distribution of the reinforced phase, difficult agglomeration, clean interface between the reinforced phase and the matrix, difficult pollution, reliable interface combination and the like, and is selected by more research institutes.
Disclosure of Invention
The invention provides a hybrid reinforced powder metallurgy titanium-based composite material and a preparation method thereof.
The invention aims to overcome the defects of the prior art and select low-cost TiH2The powder is used as a raw material, so that the preparation cost of the titanium-based composite material is greatly reduced; ti and B4C, in-situ generation of fibrous TiB and granular TiC which are mixed and enhanced; meanwhile, the titanium-based composite material with uniform tissue, fine grains and excellent performance is obtained by combining multiple processes of cold pressing forming, dehydrogenizing sintering and hot extrusion.
The titanium-based composite material prepared by the invention has the compactness of 99.9 percent, the room-temperature yield strength of 537-683 MPa, the tensile strength of 653-851 MPa and the elongation after fracture of 15-34 percent.
The invention is realized by the following technical scheme:
a preparation method of a hybrid reinforced titanium-based composite material comprises the following specific preparation steps:
the method comprises the following steps: mix TiH2Powder and B4C, uniformly mixing the powder to obtain mixed powder; the two powder ratios are: TiH294-99% of powder volume fraction, B4The volume fraction of the powder C is 1-4%;
step two: cold-pressing and forming the mixed powder obtained in the step one by an oil press to obtain a green body;
step three: placing the green body obtained in the step two into a vacuum sintering furnace for dehydrogenation and sintering processes to obtain a sintered sample;
step four: and (4) performing a hot extrusion process on the sintered sample obtained in the third step to obtain the final composite material.
In the first step, the powder mixing method comprises the steps of firstly pre-mixing the powder in an ultrasonic vibrator, and then placing the powder into a V-shaped powder mixer for secondary powder mixing; the ultrasonic vibration parameters are as follows: the vibration frequency is 20KHz, the vibration mode is continuous, and the vibration premixing time is 30-40 min; the secondary powder mixing time of the V-shaped powder mixer is 12-24 hours.
And in the second step, the mixed powder is subjected to cold pressing forming, the pressing pressure is 600-700 MPa, the pressure maintaining time is 20-60 s, the lubricating mode is die wall lubrication, and the lubricant is zinc stearate solution.
In the third step, the dehydrogenation process is combined in the sintering process, the sintering temperature is 1150-1350 ℃, the heating rate is 10 ℃/min, the heat preservation time is 2-4h, the cooling mode is furnace cooling, and the vacuum degree is 5 multiplied by 10-3Pa。
In the fourth step, in the hot extrusion process, 45 steel is selected as an anti-oxidation sheath material, the sample is subjected to heat preservation at 950-1050 ℃ for 20-30 min, the temperature of a hot extrusion die is 400-500 ℃, the temperature of an extrusion nozzle is 400-500 ℃, and the extrusion ratio is 6.25-14.
By adopting the preparation method, the high-strength and high-plasticity titanium-based composite material can be prepared.
Compared with the prior art, the invention has the following advantages and effects:
(1) the invention selects TiH2The powder is used as raw material, the preparation cost is reduced, and the TiH2The existence of hydrogen in the powder is also beneficial to the process of sintering and compacting, and the quality and the performance of a sintered sample are improved.
(2) The invention adopts a powder mixing mode of ultrasonic vibration premixing and secondary mixing of a V-shaped powder mixer, compared with the common ball-milling powder mixing mode of composite materials, solves the problem of TiH2The powder is easy to break under high-speed ball milling, the surface energy and the internal energy are improved, and the powder is very unstable after being mixed and is easy to spontaneously combust.
(3) The dehydrogenation process is combined in the sintering process, so that the flow is simplified, and the preparation period is shortened.
(4) After dehydrogenation and sintering, matching with a hot extrusion process, eliminating defects, further improving the density, refining crystal grains, and obtaining high strength and good plasticity, wherein the room-temperature yield strength is 537-683 MPa, the tensile strength is 653-851 MPa, and the elongation after fracture is 15-34%; compared with pure titanium prepared by the same process, the yield strength is improved by 265MPa, and the tensile strength is improved by 287 MPa.
Drawings
FIG. 1 is TiH in example 12Scanning electron microscope image of the powder.
FIG. 2 shows B in example 14C scanning electron microscope image of powder.
FIG. 3 is TiH in example 12Powder and B4Scanning electron microscope image of mixed powder C.
FIG. 4 is a metallographic structure of a titanium matrix composite material according to example 2.
FIG. 5 is a graph showing the room temperature tensile stress strain curves of the titanium-based composite material and pure titanium in examples 1 to 3.
FIG. 6 shows tensile fractures of the titanium-based composite material of example 3.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1:
(1) selecting TiH with the grain diameter range of 5-262 mu m and the average grain diameter of 43.7 mu m2Powder and B having a particle diameter of 1 to 3 μm4C powder, two powder ratios: TiH2Powder volume fraction of 99%, B4The volume fraction of the powder C is 1 percent; theoretically generating TiB with the volume fraction of 2.44% and TiC with the volume fraction of 0.51% in situ; premixing by ultrasonic vibration, wherein the vibration frequency is 20KHz, the vibration mode is continuous, and the vibration premixing time is 30 min; and then the mixture is mixed for the second time by a V-shaped powder mixer for 24 hours.
TiH2Powder B4The C powder and the mixed powder in this example are shown in FIGS. 1-3, where TiH2And B4The C powder is irregular, and B is mixed4C is not agglomerated and is uniformly distributed in TiH2A surface.
(2) And (2) cold-pressing the mixed powder in the step (1) by an oil press to form a green body, wherein the pressing pressure is 600MPa, and the pressure maintaining time is 60 s.
(3) Placing the green body into a vacuum sintering furnace to complete dehydrogenation sintering treatment, wherein the sintering temperature is 1150 ℃, the heating rate is 10 ℃/min, and the heat preservation time isCooling for 4 hr in furnace at vacuum degree of 5 × 10-3Pa。
(4) Carrying out hot extrusion treatment on the sintered sample obtained by dehydrogenation sintering, refining crystal grains and further densifying; in the hot extrusion process, 45 steel is selected as an anti-oxidation sheath material, the sample heat preservation temperature is 1050 ℃, the heat preservation time is 20min, the temperature of a hot extrusion die is 400 ℃, the temperature of an extrusion nozzle is 400 ℃, and the extrusion ratio is 9: 1.
(5) Experimental results show that the titanium-based composite material obtained by the embodiment has the compactness of 99.9%, the room-temperature yield strength of 537MPa, the tensile strength of 653MPa and the elongation after fracture of 34%; the room temperature tensile stress strain curve of this sample is shown in fig. 5.
Example 2:
(1) selecting TiH with the grain diameter range of 5-262 mu m and the average grain diameter of 43.7 mu m2Powder and B having a particle diameter of 1 to 3 μm4C powder, two powder ratios: TiH2Powder volume fraction 98%, B4The volume fraction of the powder C is 2 percent; theoretically generating TiB with the volume fraction of 4.91 percent and TiC with the volume fraction of 1.03 percent in situ; premixing by ultrasonic vibration, wherein the vibration frequency is 20KHz, the vibration mode is continuous, and the vibration premixing time is 30 min; and then the mixture is mixed for the second time by a V-shaped powder mixer for 18 hours.
(2) And (2) cold-pressing the mixed powder in the step (1) by an oil press to form a green body, wherein the pressing pressure is 650MPa, and the pressure maintaining time is 30 s.
(3) Placing the green body into a vacuum sintering furnace to complete dehydrogenation sintering treatment, wherein the sintering temperature is 1250 ℃, the heating rate is 10 ℃/min, the heat preservation time is 3h, the cooling mode is furnace cooling, and the vacuum degree is 5 multiplied by 10-3Pa。
(4) Carrying out hot extrusion treatment on the sintered sample obtained by dehydrogenation sintering, refining crystal grains and further densifying; in the hot extrusion process, 45 steel is selected as an anti-oxidation sheath material, the sample is kept at the temperature of 1000 ℃ for 40min, the temperature of a hot extrusion die is 450 ℃, the temperature of an extrusion nozzle is 450 ℃, and the extrusion ratio is 6.25: 1.
(5) Experimental results show that the titanium-based composite material obtained by the embodiment has the compactness of 99.9%, the room-temperature yield strength of 584MPa, the tensile strength of 739MPa and the elongation after fracture of 26%; the room temperature tensile stress strain curve of this sample is shown in fig. 5.
(6) The metallographic structure of the titanium-based composite material obtained in this example is shown in fig. 6, in which the matrix is equiaxed alpha titanium, the grains are fine, the reinforcing phase TiB is fibrous and distributed along the extrusion direction, and TiC is granular and uniformly distributed in the matrix.
Example 3:
(1) selecting TiH with the grain diameter range of 5-262 mu m and the average grain diameter of 43.7 mu m2Powder and B having a particle diameter of 1 to 3 μm4C powder, two powder ratios: TiH2The powder volume fraction is 96%, and the B4C powder volume fraction is 4%; theoretically generating TiB with the volume fraction of 9.92% and TiC with the volume fraction of 2.08% in situ; premixing by ultrasonic vibration, wherein the vibration frequency is 20KHz, the vibration mode is continuous, and the vibration premixing time is 40 min; and then the mixture is mixed for the second time by a V-shaped powder mixer for 12 hours.
(2) And (2) cold-pressing the mixed powder in the step (1) by an oil press to form a green body, wherein the pressing pressure is 700MPa, and the pressure maintaining time is 20 s.
(3) Placing the green body into a vacuum sintering furnace to complete dehydrogenation sintering treatment, wherein the sintering temperature is 1350 ℃, the heating rate is 10 ℃/min, the heat preservation time is 2h, the cooling mode is furnace cooling, and the vacuum degree is 5 multiplied by 10-3Pa。
(4) Carrying out hot extrusion treatment on the sintered sample obtained by dehydrogenation sintering, refining crystal grains and further densifying; in the hot extrusion process, 45 steel is selected as an anti-oxidation sheath material, the sample is subjected to heat preservation at 950 ℃ for 60min, the hot extrusion die is at 500 ℃, the extrusion nozzle is at 500 ℃, and the extrusion ratio is 14: 1.
(5) Experimental results show that the density of the titanium-based composite material obtained by the embodiment is as high as 99.9%, the room-temperature yield strength is 683MPa, the tensile strength is 851MPa, and the elongation after fracture is 15%; the room temperature tensile stress strain curve of this sample is shown in fig. 5; compared with pure titanium prepared by the same process, the yield strength is improved by 265MPa, and the tensile strength is improved by 287 MPa.
As mentioned above, the titanium-based composite material prepared by the method of the invention is low-cost TiH2As raw materials, the preparation cost of the titanium-based composite material can be greatly reduced; the composite material tissue consists of an isometric crystal alpha titanium matrix, fibrous TiB and granular TiC which are uniformly distributed, has compactness of 99.9 percent and excellent strong-plasticity matching, and has the yield strength of 537-683 MPa at room temperature, the tensile strength of 653-851 MPa and the elongation percentage after fracture of 15-34 percent.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (9)
1. A preparation method of a hybrid reinforced powder metallurgy titanium-based composite material is characterized by comprising the following steps:
the method comprises the following steps: mix TiH2Powder and B4C, uniformly mixing the powder to obtain mixed powder;
step two: cold-pressing and forming the mixed powder obtained in the step one by an oil press to obtain a green body;
step three: placing the green body obtained in the step two into a vacuum sintering furnace for dehydrogenation and sintering processes to obtain a sintered sample;
step four: and (4) carrying out a hot extrusion process on the sintered sample obtained in the step three to obtain the final composite material.
2. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material of claim 1, wherein: in step one, TiH2The particle size range of the powder is 5-262 mu m, and the average particle size is 43.7 mu m; b is4C, the particle size of the powder is 1-3 mu m;
the two powder ratios are respectively: TiH294-99% of powder volume fraction, B4The volume fraction of the C powder is 1-4%.
3. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material of claim 2, wherein: in the first step, the powder mixing method comprises the following steps: the powder is pre-mixed in an ultrasonic vibrator, and then the powder is put into a V-shaped powder mixer for secondary powder mixing.
4. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material of claim 3, wherein: in the process of the powder mixing method, the ultrasonic vibration parameters are as follows: the vibration frequency is 20KHz, the vibration mode is continuous, and the vibration premixing time is 30-40 min; the secondary powder mixing time of the V-shaped powder mixer is 12-24 hours.
5. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material according to claim 4, wherein the method comprises the following steps: and in the second step, cold pressing and forming the mixed powder, wherein the pressing pressure is 600-700 MPa, and the pressure maintaining time is 20-60 s.
6. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material of claim 5, wherein: in the cold-pressing forming process of the mixed powder, the lubricating mode is die wall lubrication, and the lubricant is zinc stearate solution.
7. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material according to any one of claims 1 to 6, wherein: in the third step, the dehydrogenation process is combined in the sintering process, the sintering temperature is 1150-1350 ℃, the heating rate is 10 ℃/min, the heat preservation time is 2-4h, the cooling mode is furnace cooling, and the vacuum degree is 5 multiplied by 10-3Pa。
8. The method of preparing the hybrid reinforced powder metallurgy titanium-based composite material of claim 7, wherein: in the fourth step, in the hot extrusion process, 45 steel is selected as an anti-oxidation sheath material, the sample is subjected to heat preservation at 950-1050 ℃ for 20-30 min, the temperature of a hot extrusion die is 400-500 ℃, the temperature of an extrusion nozzle is 400-500 ℃, and the extrusion ratio is 6.25-14.
9. Hybrid reinforced titanium-based composite material, characterized in that it is obtained by the process according to any one of claims 1 to 8.
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