CN107931599A - A kind of sintering process of titanium-aluminium alloy - Google Patents
A kind of sintering process of titanium-aluminium alloy Download PDFInfo
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- CN107931599A CN107931599A CN201711219537.7A CN201711219537A CN107931599A CN 107931599 A CN107931599 A CN 107931599A CN 201711219537 A CN201711219537 A CN 201711219537A CN 107931599 A CN107931599 A CN 107931599A
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- titanium
- sintering
- powder
- aluminium alloy
- hydride
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- 238000005245 sintering Methods 0.000 title claims abstract description 65
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 36
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 24
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 68
- 150000004678 hydrides Chemical class 0.000 claims abstract description 64
- 239000000843 powder Substances 0.000 claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 35
- 239000004411 aluminium Substances 0.000 claims abstract description 35
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 238000000498 ball milling Methods 0.000 claims abstract description 25
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000002525 ultrasonication Methods 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 14
- 239000011812 mixed powder Substances 0.000 claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 14
- 229910052786 argon Inorganic materials 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 10
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 abstract description 11
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 15
- 239000004575 stone Substances 0.000 description 13
- 238000012545 processing Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 239000012535 impurity Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- -1 compound titanium dioxide Chemical class 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F3/001—Starting from powder comprising reducible metal compounds
-
- 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
- B22F3/03—Press-moulding apparatus therefor
-
- 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
- B22F3/093—Compacting only using vibrations or friction
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of sintering process of titanium-aluminium alloy, belong to field of alloy preparation technology.The sintering process comprises the following steps：S1, mix raw material, and wherein raw material is titantium hydride, aluminium powder, zircoium hydride and diboron trioxide, then adds PVA aqueous solutions and carries out water base ball milling, 2 5h of Ball-milling Time；Above-mentioned mixed-powder, is loaded mould application ultrasonication by S2, and then press shaping, applies ultrasonication, pressure treatment repeatedly 35 times, obtains molding blank；S3, by above-mentioned molding blank in vacuum high temperature furnace argon gas protection under sinter, sintering temperature be 1,900 2100 DEG C, in-furnace temperature reaches 3 5h of heat preservation sintering after sintering temperature.
Description
Technical field
The present invention relates to a kind of sintering process of titanium-aluminium alloy, belong to field of alloy preparation technology.
Background technology
Titanium-aluminium alloy density is low, heat-resist, has high specific strength, specific stiffness, and high Properties of High Temperature Creep
And oxidation resistance, and biocompatibility is excellent, thus as superelevation velocity of sound aircraft and advanced aero engine of future generation
Preferred material, except in addition to aerospace field, titanium-aluminium alloy in chemical industry, body implant such as hip joint substitute or
Application in offshore industry, energy industry also gradually increases.In addition titanium-aluminium alloy is in sports goods and common consumer product field, such as
Demand in golf club, bicycle or jewellry is also more and more so that titanium-aluminium alloy has become our days
The often part in life.Application of the titanium-aluminium alloy on Vehicle Materials has also caused the concern of people.
At present, the method for preparing titanium-aluminium alloy mainly has powder sintered, ingot metallurgy etc..These methods are all to use proof gold
Belong to titanium and metallic aluminium etc. and be used as raw material, but since Titanium price is very expensive, the cost that this allows for preparing titanium-aluminium alloy is non-
Chang Gao, it is difficult to mass produce titanium-aluminium alloy.Chinese patent application (publication number CN101871055A) discloses a kind of production
The method of titanium-aluminium alloy, is smelted using titanyl compound titanium dioxide as raw material, and this method compares conventional method, reduces titanium
The production cost of aluminium alloy, but this method has the disadvantage that：The titanium-aluminium alloy product oxygen content of gained is higher, impurity content
It is high.
And the titanium-aluminium alloy intensity and plasticity obtained in current method exists as inverse ratio, when titanium-aluminium alloy has well
During intensity, its plasticity is poor, and when plasticity is good, intensity difference, these problems seriously constrain its use.
The content of the invention
For prior art titanium-aluminium alloy there are the shortcomings that, the present invention provides a kind of sintering process of titanium-aluminium alloy, obtains
Titanium-aluminium alloy there is good strength and toughness.
The above-mentioned purpose of the present invention can be realized by following technical proposal：A kind of sintering process of titanium-aluminium alloy, it is described
Sintering process comprises the following steps：
S1, mix raw material, and wherein raw material is titantium hydride, aluminium powder, zircoium hydride and diboron trioxide, then adds PVA
Aqueous solution carries out water base ball milling, Ball-milling Time 2-5h；
Above-mentioned mixed-powder, is loaded mould application ultrasonication by S2, and then press shaping, applies ultrasound repeatedly
Ripple processing, pressure treatment 3-5 times, obtain molding blank；
S3, by above-mentioned molding blank in vacuum high temperature furnace argon gas protection under sinter, sintering temperature be 1900-2100 DEG C,
In-furnace temperature reaches heat preservation sintering 3-5h after sintering temperature.
The present invention is using titantium hydride, aluminium powder, zircoium hydride and diboron trioxide as the raw material of titanium-aluminium alloy, and wherein zirconium is in titanium
Solution strengthening effect is mainly played in aluminium alloy, the effect of stable alpha phase is also acted as together with aluminium, Alloy At Room Temperature and high temperature can be improved
Tensile strength and heat resistance.Diboron trioxide in raw material can substantially reduce sintering temperature, form liquid-phase sintering, help to drop
Low porosity, improves consistency mechanical performance.By adding suitable PVA aqueous solutions in mechanical milling process, can not only rise
, can also be at some extent as carbon source to the effect of binding agent, and PVA is dissolved in water-soluble as a kind of polar material
Liquid, environmental pollution is small, degradable, and has good affinity with materials statement face, each material powder when improving grinding
Between compatibility, promote material powder mutual tolerance homogenizing.After mixed-powder loads mould, first using ultrasonication, using super
The cavitation effect of sound wave is to remove the air in mixed-powder, and increase powder consistency, then again press powder shaping,
Repeatedly apply ultrasonication, press processing 3-5 time under, gradually removal powder in air, compacted powder so that mould
Powder in tool becomes close uniform, improves follow-up sintering quality；The unique effect of ultrasonic wave is conducive to alloy grain tissue
Refinement.
Preferably, in the S2 steps, the power that applies ultrasonic wave every time is 500-800W, ultrasound 30-60s, every time
The pressure of application is 50-100MPa, pressurize 30-60s.The pressure applied to powder should be suitable, and pressure is excessive, the powder in mould
End is tightly compacted, and the processing of subsequent ultrasonic ripple also is difficult to discharge the air in powder, and pressure is too small, it is impossible to plays shaping mesh
's.
Preferably, the mould inner surface is equipped with porous stone layer of ink, the porous graphite aperture is 0.5-10nm.Titanium aluminium
For alloy in sintering process, each component is in molten condition, is also easy to produce gas (including oxygen) and impurity in the process, to burning
Tie the influence that quality produces very severe, but sintering is carried out under vacuum sealing environment, thus be difficult to the gas of generation and
Impurity carries out purified treatment.The present invention sets porous stone layer of ink in mould inner surface, and aperture 0.5-10nm, it can effectively be adsorbed
The gas and impurity produced in sintering process, purifies titanium-aluminium alloy, crystal grain thinning, improves sintering activity, so as to improve sintering
Density.
Preferably, weight ratio shared by titantium hydride is 65-75% in the raw material, weight ratio shared by aluminium powder is 15-20%,
Weight ratio shared by zircoium hydride be 5-10% and diboron trioxide shared by weight ratio be 2-5%.
Preferably, the titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 1-5 μm, 8-15 μ
M, 0.3-3 μm and 20-30 μm.The raw material granularity that the present invention selects is not of uniform size, on the one hand, the powder of irregular shape can
Strengthen the mechanical interlocking between mixed-powder particle in pressed compact, improve compact strength, and then reduce pressed compact elastic after effect phenomenon
Appearance, and powder particle surface in irregular shape is rougher, and closely knit combination, different mesh can be formed in pressing process
Several coarse powder and fine powder collocation use, it is ensured that reduce porosity when filling powder, realization is sufficient filling with, the pressed compact suppressed
Density and intensity can all increase, the progress of acceleration of sintering process.On the other hand, raw material granularity is related with fusing point, and fusing point is higher
Raw material, selects relatively low granularity, so as to play influence and the balancing material fusing point that equilibrium particle size melts dusty material
Between relation (fusing point of raw material is a scope, and selected raw material granularity is smaller, its corresponding fusing point is just relatively lower)
Effect, alloy structure is each to be mutually evenly distributed in sintering process, improves sintering quality, assigns product good mechanical property.
Preferably, the ball milling slurry concentration is the 55-65% (in terms of solid quality percentage).When the concentration of slurry
During increase, the distance between suspended matter reduces in slurry, and the mutual collision between material is more frequent；When the concentration of slurry reduces
When, the distance between suspended matter increase in slurry, the probability collided between each other is reduced, and therefore intensity can also weaken.
Therefore with the increase of slurry concentration, the raw material particle mean size that ball milling comes out also tapers into, and slurry, which increases, to be arrived to after a certain concentration
Granularity will not be had an impact.
Preferably, the sintering process is after step S3 high temperature sinterings, be quickly down to the speed of 20-50 DEG C/S-
50~-100 DEG C, temperature is kept to add Electric Pulse Treatment 50-100min, wherein electric pulse voltage is 1000-3000V.After sintering,
Fast cooling, titanium-aluminium alloy tissue quickly solidify, and solidification is organized under low temperature electric impulse action, and crystal grain gradually refines, so that
Finer grain structure is obtained, and organizes each phase to be uniformly distributed in low temperature electric impulse action, obtains the institutional framework of uniqueness, most
The comprehensive performance of titanium-aluminium alloy is set to be greatly improved eventually.
Compared with prior art, sintering process of the invention by control the size distribution of raw materials for sintering, to powder repeatedly
Apply ultrasonication and pressure treatment and porous stone layer of ink is set, the interaction between various mechanism, finally closes titanium aluminium
Gold utensil has good mechanical property, expands its application range.
Embodiment
It is the specific embodiment of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.If without specified otherwise, the raw material employed in the embodiment of the present invention is commonly used in the art
Raw material, the method employed in embodiment, be this area conventional method.
Embodiment 1
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
70%, weight ratio shared by aluminium powder be 18%, weight ratio shared by zircoium hydride be 8% and diboron trioxide shared by weight ratio be 4%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are 3 μm, then add PVA aqueous solutions so that ball milling slurry is dense
Spend for (in terms of solid quality percentage) 60%, carry out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 5nm, 600W ultrasonication 40s are applied to mould, 200MPa pressure pressurize shaping 50s are then imposed, repeatedly with same
Condition applies ultrasonication, press processing 3 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2000 DEG C, in-furnace temperature
Reach heat preservation sintering 4h after sintering temperature.
Embodiment 2
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
70%, weight ratio shared by aluminium powder be 18%, weight ratio shared by zircoium hydride be 8% and diboron trioxide shared by weight ratio be 4%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 10 μm, 3 μm, 20 μm and 5 μm, then add PVA
Aqueous solution so that ball milling slurry concentration is 60% (in terms of solid quality percentage), carries out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 5nm, 600W ultrasonication 40s are applied to mould, 200MPa pressure pressurize shaping 50s are then imposed, repeatedly with same
Condition applies ultrasonication, press processing 3 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2000 DEG C, in-furnace temperature
Reach heat preservation sintering 4h after sintering temperature.
Embodiment 3
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
70%, weight ratio shared by aluminium powder be 18%, weight ratio shared by zircoium hydride be 8% and diboron trioxide shared by weight ratio be 4%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 5 μm, 10 μm, 3 μm and 20 μm, then add PVA
Aqueous solution so that ball milling slurry concentration is 60% (in terms of solid quality percentage), carries out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 5nm, 600W ultrasonication 40s are applied to mould, 200MPa pressure pressurize shaping 50s are then imposed, repeatedly with same
Condition applies ultrasonication, press processing 3 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2000 DEG C, in-furnace temperature
Reach heat preservation sintering 4h after sintering temperature.
Embodiment 4
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
70%, weight ratio shared by aluminium powder be 18%, weight ratio shared by zircoium hydride be 8% and diboron trioxide shared by weight ratio be 4%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 5 μm, 10 μm, 3 μm and 20 μm, then add PVA
Aqueous solution so that ball milling slurry concentration is 60% (in terms of solid quality percentage), carries out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 5nm, 600W ultrasonication 40s are applied to mould, then impose 80MPa pressure pressurize shaping 50s, then add 600W ultrasonic waves
40s is handled, imposes 80MPa pressure pressurize shaping 50s.
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2000 DEG C, in-furnace temperature
Reach heat preservation sintering 4h after sintering temperature.
Embodiment 5
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
70%, weight ratio shared by aluminium powder be 18%, weight ratio shared by zircoium hydride be 8% and diboron trioxide shared by weight ratio be 4%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 5 μm, 10 μm, 3 μm and 20 μm, then add PVA
Aqueous solution so that ball milling slurry concentration is 60% (in terms of solid quality percentage), carries out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 5nm, 600W ultrasonication 40s are applied to mould, 80MPa pressure pressurize shaping 50s are then imposed, repeatedly with same bar
Part applies ultrasonication, press processing 3 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2000 DEG C, in-furnace temperature
Reach heat preservation sintering 4h after sintering temperature.
Embodiment 6
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
70%, weight ratio shared by aluminium powder be 18%, weight ratio shared by zircoium hydride be 8% and diboron trioxide shared by weight ratio be 4%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 5 μm, 10 μm, 3 μm and 20 μm, then add PVA
Aqueous solution so that ball milling slurry concentration is 60% (in terms of solid quality percentage), carries out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 5nm, 600W ultrasonication 40s are applied to mould, 80MPa pressure pressurize shaping 50s are then imposed, repeatedly with same bar
Part applies ultrasonication, press processing 3 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2000 DEG C, in-furnace temperature
Reach heat preservation sintering 4h after sintering temperature.After high temperature sintering, -80 DEG C quickly are down to the speed of 30 DEG C/S, keeps temperature to add
Electric Pulse Treatment 80min, wherein electric pulse voltage are 2000V.
Embodiment 7
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
75%, weight ratio shared by aluminium powder be 15%, weight ratio shared by zircoium hydride be 7% and diboron trioxide shared by weight ratio be 3%,
Titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 1 μm, 15 μm, 0.3 μm and 25 μm, then addition
PVA aqueous solutions so that ball milling slurry concentration is 65% (in terms of solid quality percentage), carries out water base ball milling 5h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 8nm, 800W ultrasonication 30s are applied to mould, 100MPa pressure pressurize shaping 40s are then imposed, repeatedly with same
Condition applies ultrasonication, press processing 4 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 2100 DEG C, in-furnace temperature
Reach heat preservation sintering 3h after sintering temperature.
Embodiment 8
Titantium hydride, aluminium powder, zircoium hydride and diboron trioxide are mixed, wherein, weight ratio is shared by titantium hydride in raw material
65%, weight ratio shared by aluminium powder be 20%, weight ratio shared by zircoium hydride be 10% and diboron trioxide shared by weight ratio be
5%, titantium hydride, aluminium powder, the granularity of zircoium hydride and diboron trioxide are respectively 4 μm, 8 μm, 2 μm and 20 μm, then addition
PVA aqueous solutions so that ball milling slurry concentration is 55% (in terms of solid quality percentage), carries out water base ball milling 3h；
Above-mentioned mixed-powder is fitted into mould, the mould inner surface is equipped with porous stone layer of ink, the aperture of porous graphite
For 1nm, 500W ultrasonication 60s are applied to mould, 50MPa pressure pressurize shaping 50s are then imposed, repeatedly with same bar
Part applies ultrasonication, press processing 3 times；
Above-mentioned molding blank is sintered in vacuum high temperature furnace under argon gas protection, sintering temperature is 1900 DEG C, in-furnace temperature
Reach heat preservation sintering 5h after sintering temperature.
Comparative example 1
Difference lies in the raw material in comparative example 1 does not include diboron trioxide to comparative example 1, other with implementing with embodiment 5
Example 5 is identical.
Comparative example 2
Difference lies in comparative example 2 is not ultrasonically treated, other with 5 phase of embodiment for comparative example 2 and embodiment 5
Together.
Comparative example 3
Comparative example 3 and embodiment 5 do not have a porous stone layer of ink difference lies in the mould inner surface of, comparative example 3, it is other with it is real
It is identical to apply example 5.
Comparative example 4
Comparative example 4 and embodiment 5 difference lies in, the porous stone layer of ink aperture of the mould inner surface of comparative example 5 is 20nm,
It is other same as Example 5.
The performance of embodiment 1-8 and comparative example the 1-4 titanium-aluminium alloy being prepared is tested, the performance test results are such as
Shown in table 1.
The performance test results of the titanium-aluminium alloy of 1 1-8 of the embodiment of the present invention of table and comparative example 1-4
From table 1 it follows that the mechanical property of embodiment 5-8 is excellent, hardness is big, and toughness is excellent, and comparative example 1-4 prepares titanium
Not in technical solution of the present invention protection domain, the performance for obtaining titanium-aluminium alloy has very the process of aluminium alloy relative to embodiment 5
It is big to reduce.
Specific embodiment described in the present invention is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or additions to described specific embodiment or replace in a similar way
Generation, but without departing from spirit of the invention or beyond the scope of the appended claims.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (6)
1. a kind of sintering process of titanium-aluminium alloy, it is characterised in that the sintering process comprises the following steps：
S1, mix raw material, and wherein raw material is titantium hydride, aluminium powder, zircoium hydride and diboron trioxide, and it is water-soluble then to add PVA
Liquid carries out water base ball milling, Ball-milling Time 2-5h；
Above-mentioned mixed-powder, is loaded mould application ultrasonication by S2, and then press shaping, applies repeatedly at ultrasonic wave
Reason, pressure treatment 3-5 times, obtain molding blank；
S3, sinter above-mentioned molding blank in vacuum high temperature furnace under argon gas protection, sintering temperature is 1900-2100 DEG C, in stove
Temperature reaches heat preservation sintering 3-5h after sintering temperature.
2. the sintering process of titanium-aluminium alloy according to claim 1, it is characterised in that in the S2 steps, apply every time
The power of ultrasonic wave is 500-800W, ultrasound 30-60s, and the pressure applied every time is 50-100MPa, pressurize 30-60s.
3. the sintering process of titanium-aluminium alloy according to claim 1, it is characterised in that the mould inner surface is equipped with porous
Graphite linings, the porous graphite aperture are 0.5-10nm.
4. the sintering process of titanium-aluminium alloy according to claim 1, it is characterised in that weight shared by titantium hydride in the raw material
It is 65-75% to measure ratio, and weight ratio shared by aluminium powder is 15-20%, and weight ratio shared by zircoium hydride is 5-10% and diboron trioxide
Shared weight ratio is 2-5%.
5. the sintering process of titanium-aluminium alloy according to claim 1, it is characterised in that the titantium hydride, aluminium powder, zircoium hydride
And the granularity of diboron trioxide is respectively 1-5 μm, 8-15 μm, 0.3-3 μm and 20-30 μm.
6. the sintering process of titanium-aluminium alloy according to claim 1, it is characterised in that the ball milling slurry concentration for (with
Solid quality percentage meter) 55-65%.
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