CN109280817A - A kind of bidirectional joint - Google Patents
A kind of bidirectional joint Download PDFInfo
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- CN109280817A CN109280817A CN201811288705.2A CN201811288705A CN109280817A CN 109280817 A CN109280817 A CN 109280817A CN 201811288705 A CN201811288705 A CN 201811288705A CN 109280817 A CN109280817 A CN 109280817A
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- bidirectional joint
- aluminum alloy
- powder
- alloy materials
- pore creating
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 47
- 239000000956 alloy Substances 0.000 claims abstract description 67
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000011148 porous material Substances 0.000 claims abstract description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 32
- 239000006260 foam Substances 0.000 claims abstract description 26
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 8
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 55
- 229910045601 alloy Inorganic materials 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 26
- 239000000835 fiber Substances 0.000 claims description 22
- 239000012071 phase Substances 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- 241000169203 Eichhornia Species 0.000 claims description 19
- 239000004411 aluminium Substances 0.000 claims description 19
- 239000011331 needle coke Substances 0.000 claims description 19
- 238000005245 sintering Methods 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 14
- 239000011265 semifinished product Substances 0.000 claims description 14
- 238000003701 mechanical milling Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 239000007790 solid phase Substances 0.000 claims description 8
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000000498 ball milling Methods 0.000 claims description 7
- 238000012805 post-processing Methods 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 208000007865 relapsing fever Diseases 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 5
- 238000012546 transfer Methods 0.000 abstract description 4
- 238000010010 raising Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910018176 Al—(Mn, Fe)—Si Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- 241000233805 Phoenix Species 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- -1 graphite Alkene Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- 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
- 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
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
-
- 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
Abstract
The present invention relates to a kind of connectors, and in particular to a kind of bidirectional joint belongs to aluminum alloy materials field.Bidirectional joint of the present invention is made by aluminum alloy materials, the aluminum alloy materials are by following mass percent at being grouped as: Mn:1.05-1.52%, Si:1.23-1.28%, Fe:0.35-0.48%, Cu:0.2-0.4%, Y:0.12-0.15%, Sm:0.25-0.38%, three-dimensional foam graphene: 4.5-6.2%, surplus Al.The present invention makes aluminum alloy materials matrix micropores by adding pore creating material, stomata reduces the space of gas molecule slightly for this, reduce convective heat transfer, therefore the thermal coefficient of castable can not only be significantly reduced, while the presence of these micropores plays the role of alleviating the raising that stress is conducive to aluminum alloy materials intensity to a certain extent.
Description
Invention field
The present invention relates to a kind of connectors, and in particular to a kind of bidirectional joint belongs to aluminum alloy materials field.
Background technique
Connector refers to that be applied to make two or more parts (or component) to be fastenedly connected is used as an entirety
A kind of machine components, be widely applied various machinery, equipment, vehicle, ship, railway, building, structure, tool, instrument, chemical industry,
Above instrument and articles, it can be seen that miscellaneous connector.
Bidirectional joint is exactly the connector that both ends have connecting pin, and one of connecting pin is threaded hole, another connecting pin
It is a through-hole, the axis of the through-hole and the axis of threaded hole are vertically arranged, but this bidirectional joint has a problem, is exactly
The bore of this threaded hole and through-hole is fixed, that is to say, that after threaded hole is connect with first after connector, through-hole
Size may be mismatched with second to connector, thus just more troublesome, so needing a kind of threaded hole and hole size can
With the bidirectional joint arbitrarily adjusted according to actual needs.
Summary of the invention
In view of the above-mentioned problems existing in the prior art, it is two-way to propose that a kind of intensity is high, mechanical performance is excellent by the present invention
Connector.
The purpose of the present invention is realized by following technical solution: a kind of bidirectional joint, the bidirectional joint is by aluminium alloy
Material is made, and the aluminum alloy materials are by following mass percent at being grouped as: Mn:1.05-1.52%, Si:1.23-
1.28%, Fe:0.35-0.48%, Cu:0.2-0.4%, Y:0.12-0.15%, Sm:0.25-0.38%, three-dimensional foam graphite
Alkene: 4.5-6.2%, surplus Al.
The present invention uses the aluminum alloy materials of mentioned component, and wherein Mn is in aluminium alloy mainly with Al6The form of Mn exists,
Fe atomic energy is solid-solution in wherein and forms Al simultaneously6(Mn, Fe) phase, Si element can form α-Al (Mn, Fe) Si after heat treatment
Phase, Sm can then form Al10Cu7Sm2。
In bidirectional joint of the present invention, it joined the metallic elements such as Fe, Cu, Mn.Aluminium element fusing point is very high, and fusing speed is very
Slowly, these metals are added can be made intermediate alloy with aluminium, then element is introduced into aluminum melt in the form of intermediate alloy, thus
It avoids to accelerate fusing speed and increases temperature bring energy waste, while can be to avoid the band due to certain element oxides
Enter impurity, and it can be made to realize high absorptivity and stability under lower smelting temperature, is conducive to improve aluminium alloy cast ingot
Quality reduce energy consumption and cost simultaneously.The metallic element purity added in the present invention is 99% or more, can be by the band of impurity
Enter amount to minimize.
In bidirectional joint of the present invention, Y element also added in composition.Y be a kind of metallic element and rare earth element it
One.Y element can form Al with Al and Cu6Cu6Y intermetallic compound, and be distributed along crystal boundary.These intermetallic compounds can have
The deformation of matrix and the movement of crystal boundary, improve alloy high-temp intensity when effect obstruction high temperature.But meanwhile with the increase of Y element, contain
Y compound agglomeration is blocking, and Alloy At Room Temperature and mechanical behavior under high temperature reduce.Therefore, containing for Y element is limited in the present invention
Amount, while Y element can be made to play its effect, does not generate negative effect.
In addition, the addition of Sm element, can exist in the form of compound, the analysis in aluminium alloy in aluminum-system
Out mutually based on α-Al (Mn, Fe) Si phase, while there are also a small amount of phase containing Sm, the addition of Sm element can refine α-Al (Mn, Fe)
Si precipitated phase；When Sm content is very low, Sm is mainly solid-solution in aluminum substrate, and the particle of phase containing Sm is few, and structure refinement is unobvious, with Sm
Content obviously increases, and the particle of phase containing Sm increases, nucleation rate improve, but Sm content be more than it is a certain amount of, the increase of numbers of particles containing Sm is not
Obviously, but size increases particle aggregation, and crystal boundary is thicker, and thinning effect weakens.
Furthermore in bidirectional joint of the present invention, it is also added into three-dimensional foam graphene.It is well known that graphene is by carbon
Atom is with sp2The single layer of hydridization arrangement or few layer atom two dimensional crystal, are in hexagonal annular plates, form honeycomb crystal knot
Structure, the excellent mechanical performance of graphene, so that it is used as reinforcing material to be added more in Material Field.But due to graphene sheet layer
Between very strong π-π interaction and Van der Waals force, they are easy to reunite, even if being total to by ultrasonic disperse or shearing
Mixed mode carries out compound, and agglomeration can still occur for graphene in gained composite material, and the graphene of reunion does not have not only
The effect of enhancing also results in composite property decline instead.Therefore, three-dimensional foam graphene is added in the present invention, is preparing
In the process, the other elements in aluminum alloy materials composition can be filled into the hole of three-dimensional foam graphene, can not only be prevented
The aggregation of graphene film interlayer, and the mechanical performance of graphene itself can be preferably played, it is closed to enhance aluminium obtained
The intensity and hardness of golden material.
In a kind of above-mentioned bidirectional joint, the three-dimensional foam graphene surface is coated with Water hyacinth fiber coat.Phoenix eyes
For blue fiber as a kind of plant fiber, its own has certain intensity, it is most important that, with certain cohesiveness, this hair
Bright that it is coated on three-dimensional foam graphene surface, Water hyacinth fiber and being coupled for three-dimensional foam graphene are strong during the preparation process
Degree increases, and to a certain extent, other metals composition that can be avoided in aluminum alloy materials is twined with three-dimensional foam graphene
Knot, so as to cause three-dimensional foam graphene disintegration,
Preferably, the Water hyacinth fiber coat with a thickness of 4-6 μm.The thickness of Water hyacinth fiber coat is too big, with
The particle cluster partial size generated between three-dimensional foam graphene is gradually increased, and interface can become uneven, in certain thickness, phoenix
The blue fiber of eye can generate good entanglement with three-dimensional foam graphene.
It is another object of the present invention to provide a kind of preparation method of above-mentioned bidirectional joint, the preparation method is specific
Include the following steps:
Weighing: the raw material for preparing aluminium alloy and ball milling are weighed into alloy powder；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 200-250MPa pressure；
Removal pore creating material: green compact is heated to 120-140 DEG C of heat preservation 4-5h removal under the protective atmosphere of high-purity argon gas and is made
Hole agent；
Sintering: the green compact for removing pore creating material is heated to cold with furnace after 1300-1400 DEG C of heat preservation 4-5h high temperature solid-phase sintering
But bidirectional joint semi-finished product are obtained；
Post-processing: bidirectional joint finished product is obtained after bidirectional joint semi-finished product are carried out heat treatment and turning processing.
The present invention makes aluminum alloy materials matrix micropores by adding pore creating material, and stomata reduces gas molecule slightly for this
Space, reduce convective heat transfer, therefore the thermal coefficient of castable can not only be significantly reduced, while these micropores
There are the raisings that the effect for alleviating stress is conducive to aluminum alloy materials intensity to a certain extent.
It further include that needle coke is added in mechanical milling process in a kind of above-mentioned preparation method of bidirectional joint.Needle coke tool
There is similar the crystal structure of graphite.Needle coke is to the existing fragmentation of magnesium granules in mechanical milling process, and has peptizaiton.Synusia
Interior C-C key is sp2 hydridization covalent bond, and mechanical strength is high, and irregular edge is to aluminum alloy materials particle energy in mechanical milling process
Generate effective fragmentation；Inter-layer bonding force is the big support key of delocalization, and interlayer is easy to opposite and slides, generates in mechanical milling process big
Synusia is measured, effective peptizaiton can be generated to metallic particles, material is avoided to reunite in mechanical milling process, the powder dispersed
Body.
Preferably, the quality of the needle coke is the 1.25-1.5% of aluminum alloy materials quality.Needle coke content is excessive,
Easily bottom is adhered to cause to be not easy sinter molding in alloy preparation process；Needle coke content is very few, then does not have peptizaiton.
In a kind of above-mentioned preparation method of bidirectional joint, the NH4HCO3The partial size of powder is 20-30 μm.In alloy
Hole is mainly derived from green body pressing process existing original hole and the removal of pore creating material low temperature between alloy powder particle
After be formed by large scale hole because pre-molding pressure in preparation process, sintering temperature and when ask it is identical so that alloy-based
Hole on body is substantially similar, and the large scale hole that pore creating material is formed shrinkage degree very little in high temperature solid-phase sintering, therefore
Pore creating material NH4HCO3The dosage and size of powder determine the porosity and pore size of alloy.
Preferably, the NH4HCO3The quality of powder is the 10-15% of aluminum alloy materials quality.NH4HCO3Powder adds
What is entered is excessive, and the hole in alloy can hinder the diffusion of β phase stable element in high-temperature sintering process, and the porosity the high more is unfavorable for
The generation of β phase.Porosity increase can reduce effective bearing area, increasing stress concentration phenomenon, so as to cause alloy pressure resistance
Degree reduces, but as pore creating material dosage increases, the relatively high a phase amount of intensity is gradually increased on alloy substrate, so that resistance to compression
Strength reduction speed is slowed down.
In a kind of above-mentioned preparation method of bidirectional joint, the heat treatment is retrogression heat treatment, the retrogression heat treatment
Specifically include four-stage: the first stage: temperature is 450-460 DEG C, time 1-1.5h；Second stage: temperature 100-110
DEG C, time 13-13.5h；Phase III: temperature is 180-185 DEG C, time 10-12min；Fourth stage: temperature 100-
110 DEG C, time 13-13.5h.The present invention returns the formation of the coarse discontinuous phase of stage crystal boundary in higher temperature in short-term, big
Tend to toughness and tenacity that is smooth, and then improving alloy in angle and low-angle boundary.
Compared with prior art, the present invention has the advantage that
1, the present invention uses the aluminum alloy materials of special component, and wherein Mn is in aluminium alloy mainly with Al6The form of Mn is deposited
, while Fe atomic energy is solid-solution in wherein and forms Al6(Mn, Fe) phase, Si element can form α-Al (Mn, Fe) after heat treatment
Si phase, Sm can then form Al10Cu7Sm2；
2, the present invention makes aluminum alloy materials matrix micropores by adding pore creating material, and stomata reduces gas point slightly for this
The space of son, reduces convective heat transfer, therefore can not only significantly reduce the thermal coefficient of castable, while these micropores
Presence play the role of alleviating stress and be conducive to the raising of aluminum alloy materials intensity to a certain extent.
Specific embodiment
It is a specific embodiment of the invention below, technical scheme of the present invention will be further described, but the present invention
It is not limited to these examples.
Embodiment 1
Weighing: the raw material for preparing aluminium alloy and ball milling are weighed into alloy powder；Wherein, the aluminum alloy materials are by following matter
Amount percentage at being grouped as: Mn:1.05%, Si:1.23%, Fe:0.35%, Cu:0.2%, Y:0.12%, Sm:0.25%,
Three-dimensional foam graphene: 4.5%, surplus Al；The three-dimensional foam graphene surface is coated with Water hyacinth fiber coat；It is described
Water hyacinth fiber coat with a thickness of 4 μm；It further include that needle coke is added in mechanical milling process, the quality of the needle coke is aluminium conjunction
The 1.25% of golden quality of materials；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；The NH4HCO3
The partial size of powder is 20 μm；The NH4HCO3The quality of powder is the 10% of aluminum alloy materials quality；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 200MPa pressure；
Removal pore creating material: green compact is heated to 120-140 DEG C of heat preservation 4h removal pore-creating under the protective atmosphere of high-purity argon gas
Agent；
Sintering: by the green compact for removing pore creating material be heated to furnace cooling after 1300 DEG C of heat preservation 4h high temperature solid-phase sinterings obtain it is two-way
Connector semi-finished product；
Post-processing: bidirectional joint semi-finished product are carried out to obtain bidirectional joint finished product after heat treatment is handled with turning, at the heat
Reason is retrogression heat treatment, and the retrogression heat treatment specifically includes four-stage: the first stage: temperature is 450 DEG C, time 1h；
Second stage: temperature is 100 DEG C, time 13h；Phase III: temperature is 180 DEG C, time 10min；Fourth stage: temperature
It is 100 DEG C, time 13h.
Embodiment 2
Weighing: the raw material for preparing aluminium alloy and ball milling are weighed into alloy powder；Wherein, the aluminum alloy materials are by following matter
Amount percentage at being grouped as: Mn:1.12%, Si:1.24%, Fe:0.37%, Cu:0.25%, Y:0.13%, Sm:
0.27%, three-dimensional foam graphene: 4.8%, surplus Al；The three-dimensional foam graphene surface is applied coated with Water hyacinth fiber
Layer；The Water hyacinth fiber coat with a thickness of 4.5 μm；It further include that needle coke is added in mechanical milling process, the needle coke
Quality is the 1.3% of aluminum alloy materials quality；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；The NH4HCO3
The partial size of powder is 22 μm；The NH4HCO3The quality of powder is the 11% of aluminum alloy materials quality；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 210MPa pressure；
Removal pore creating material: green compact is heated to 125 DEG C of heat preservation 4.2h removal pore creating materials under the protective atmosphere of high-purity argon gas；
Sintering: the green compact for removing pore creating material is heated to cold with furnace after 1300-1400 DEG C of heat preservation 4-5h high temperature solid-phase sintering
But bidirectional joint semi-finished product are obtained；
Post-processing: bidirectional joint semi-finished product are carried out to obtain bidirectional joint finished product after heat treatment is handled with turning, at the heat
Reason is retrogression heat treatment, and the retrogression heat treatment specifically includes four-stage: the first stage: temperature is 452 DEG C, and the time is
1.2h；Second stage: temperature is 102 DEG C, time 13.1h；Phase III: temperature is 181 DEG C, time 10.5min；4th
Stage: temperature is 102 DEG C, time 13.1h.
Embodiment 3
Weighing: the raw material for preparing aluminium alloy and ball milling are weighed into alloy powder；Wherein, the aluminum alloy materials are by following matter
Amount percentage at being grouped as: Mn:1.28%, Si:1.25%, Fe:0.4%, Cu:0.3%, Y:0.135%, Sm:0.3%,
Three-dimensional foam graphene: 4.5-6.2%, surplus Al；The three-dimensional foam graphene surface is coated with Water hyacinth fiber coat；
The Water hyacinth fiber coat with a thickness of 5 μm；It further include that needle coke is added in mechanical milling process, the quality of the needle coke is
The 1.32% of aluminum alloy materials quality；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；The NH4HCO3
The partial size of powder is 25 μm；The NH4HCO3The quality of powder is the 12.5% of aluminum alloy materials quality；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 225MPa pressure；
Removal pore creating material: green compact is heated to 130 DEG C of heat preservation 4.5h removal pore creating materials under the protective atmosphere of high-purity argon gas；
Sintering: the green compact for removing pore creating material is heated to furnace cooling after 1350 DEG C of heat preservation 4.5h high temperature solid-phase sinterings and is obtained pair
To connector semi-finished product；
Post-processing: bidirectional joint semi-finished product are carried out to obtain bidirectional joint finished product after heat treatment is handled with turning, at the heat
Reason is retrogression heat treatment, and the retrogression heat treatment specifically includes four-stage: the first stage: temperature is 455 DEG C, and the time is
1.25h；Second stage: temperature is 105 DEG C, time 13.3h；Phase III: temperature is 183 DEG C, time 11min；4th
Stage: temperature is 105 DEG C, time 13.3h.
Embodiment 4
Weighing: the raw material for preparing aluminium alloy and ball milling are weighed into alloy powder；Wherein, the aluminum alloy materials are by following matter
Amount percentage at being grouped as: Mn:1.45%, Si:1.27%, Fe:0.45%, Cu:0.35%, Y:0.14%, Sm:
0.36%, three-dimensional foam graphene: 6%, surplus Al；The three-dimensional foam graphene surface is applied coated with Water hyacinth fiber
Layer；The Water hyacinth fiber coat with a thickness of 5.5 μm；It further include that needle coke is added in mechanical milling process, the needle coke
Quality is the 1.45% of aluminum alloy materials quality；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；The NH4HCO3
The partial size of powder is 28 μm；The NH4HCO3The quality of powder is the 14% of aluminum alloy materials quality；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 240MPa pressure；
Removal pore creating material: green compact is heated to 135 DEG C of heat preservation 4.8h removal pore creating materials under the protective atmosphere of high-purity argon gas；
Sintering: the green compact for removing pore creating material is heated to furnace cooling after 1380 DEG C of heat preservation 4.8h high temperature solid-phase sinterings and is obtained pair
To connector semi-finished product；
Post-processing: bidirectional joint semi-finished product are carried out to obtain bidirectional joint finished product after heat treatment is handled with turning, at the heat
Reason is retrogression heat treatment, and the retrogression heat treatment specifically includes four-stage: the first stage: temperature is 458 DEG C, and the time is
1.4h；Second stage: temperature is 108 DEG C, time 13.4h；Phase III: temperature is 184 DEG C, time 11.5min；4th
Stage: temperature is 108 DEG C, time 13.4h.
Embodiment 5
Weighing: the raw material for preparing aluminium alloy and ball milling are weighed into alloy powder；Wherein, the aluminum alloy materials are by following matter
Amount percentage at being grouped as: Mn:1.52%, Si:1.28%, Fe:0.48%, Cu:0.4%, Y:0.15%, Sm:0.38%,
Three-dimensional foam graphene: 6.2%, surplus Al；The three-dimensional foam graphene surface is coated with Water hyacinth fiber coat；It is described
Water hyacinth fiber coat with a thickness of 6 μm；It further include that needle coke is added in mechanical milling process, the quality of the needle coke is aluminium conjunction
The 1.5% of golden quality of materials；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；The NH4HCO3
The partial size of powder is 30 μm；The NH4HCO3The quality of powder is the 15% of aluminum alloy materials quality；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 250MPa pressure；
Removal pore creating material: green compact is heated to 140 DEG C of heat preservation 5h removal pore creating materials under the protective atmosphere of high-purity argon gas；
Sintering: by the green compact for removing pore creating material be heated to furnace cooling after 1400 DEG C of heat preservation 5h high temperature solid-phase sinterings obtain it is two-way
Connector semi-finished product；
Post-processing: bidirectional joint semi-finished product are carried out to obtain bidirectional joint finished product after heat treatment is handled with turning, at the heat
Reason is retrogression heat treatment, and the retrogression heat treatment specifically includes four-stage: the first stage: temperature is 460 DEG C, and the time is
1.5h；Second stage: temperature is 110 DEG C, time 13.5h；Phase III: temperature is 185 DEG C, time 12min；Fourth order
Section: temperature is 110 DEG C, time 13.5h.
Embodiment 6
Difference with embodiment 3 is only that the embodiment three-dimensional foam graphene surface does not coat the painting of Water hyacinth fiber
Layer, other are same as Example 3, and details are not described herein again.
Embodiment 7
Difference with embodiment 3 is only that, the embodiment Water hyacinth fiber coat with a thickness of 3 μm, other and embodiment 3
Identical, details are not described herein again.
Embodiment 8
Difference with embodiment 3 is only that, the embodiment Water hyacinth fiber coat with a thickness of 8 μm, other and embodiment 3
Identical, details are not described herein again.
Embodiment 9
Difference with embodiment 3 is only that, the embodiment is during the preparation process without addition pore creating material, other and embodiment
3 is identical, and details are not described herein again.
Embodiment 10
Difference with embodiment 3 is only that, the embodiment in preparing that needle coke is not added, other and embodiment 3
Identical, details are not described herein again.
Embodiment 11
Difference with embodiment 3 is only that, NH in the embodiment4HCO3The partial size of powder is 18 μm, other and embodiment 3
Identical, details are not described herein again.
Embodiment 12
Difference with embodiment 3 is only that, NH in the embodiment4HCO3The partial size of powder is 32 μm, other and embodiment 3
Identical, details are not described herein again.
Embodiment 13
Difference with embodiment 3 is only that, the heat treatment in the embodiment is common heat treatment, other and 3 phase of embodiment
Together, details are not described herein again.
Comparative example 1
Difference with embodiment 3 is only that, the comparative example is using common commercially available aluminum alloy materials, other and 3 phase of embodiment
Together, details are not described herein again.
Comparative example 2
Difference with embodiment 3 is only that, Sm element is not contained in the comparative example aluminum alloy materials, other and embodiment 3
Identical, details are not described herein again.
Comparative example 3
Difference with embodiment 3 is only that, three-dimensional foam graphene is not contained in the comparative example aluminum alloy materials, other with
Embodiment 3 is identical, and details are not described herein again.
Bidirectional joint made from above-described embodiment 1-13 and comparative example 1-3 is subjected to performance detection, testing result such as 1 institute of table
Show.
Table 1: bidirectional joint performance test results in embodiment 1-13 and comparative example 1-3
It can be seen from the results above that the present invention makes aluminum alloy materials matrix micropores by adding pore creating material, these
Micro- stomata reduces the space of gas molecule, reduces convective heat transfer, therefore can not only significantly reduce leading for castable
Hot coefficient, while the presence of these micropores plays the role of alleviation stress and is conducive to aluminum alloy materials intensity to a certain extent
It improves.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, but simultaneously
Spirit or beyond the scope defined by the appended claims of the invention is not deviated by.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of bidirectional joint, which is characterized in that the bidirectional joint is made by aluminum alloy materials, the aluminum alloy materials by with
Lower mass percent at being grouped as: Mn:1.05-1.52%, Si:1.23-1.28%, Fe:0.35-0.48%, Cu:0.2-
0.4%, Y:0.12-0.15%, Sm:0.25-0.38%, three-dimensional foam graphene: 4.5-6.2%, surplus Al.
2. a kind of bidirectional joint according to claim 1, which is characterized in that the three-dimensional foam graphene surface is coated with
Water hyacinth fiber coat.
3. a kind of bidirectional joint according to claim 2, which is characterized in that the Water hyacinth fiber coat with a thickness of 4-
6μm。
4. a kind of preparation method of bidirectional joint as described in claim 1, which is characterized in that the preparation method specifically includes
Following steps:
Weighing: the raw material that aluminium alloy is prepared in claim 1 and ball milling are weighed into alloy powder；
It adds pore creating material: adding pore creating material NH in alloy powder4HCO3Aluminium powder is obtained after powder stirring；
Precompressed: aluminium powder is pressed into cylindric green compact in advance under 200-250MPa pressure；
Removal pore creating material: green compact is heated to 120-140 DEG C of heat preservation 4-5h removal pore creating material under the protective atmosphere of high-purity argon gas；
Sintering: furnace cooling obtains after the green compact for removing pore creating material is heated to 1300-1400 DEG C of heat preservation 4-5h high temperature solid-phase sintering
Bidirectional joint semi-finished product；
Post-processing: bidirectional joint finished product is obtained after bidirectional joint semi-finished product are carried out heat treatment and turning processing.
5. a kind of preparation method of bidirectional joint according to claim 4, which is characterized in that further include in mechanical milling process
Needle coke is added.
6. a kind of preparation method of bidirectional joint according to claim 5, which is characterized in that the quality of the needle coke is
The 1.25-1.5% of aluminum alloy materials quality.
7. a kind of preparation method of bidirectional joint according to claim 4, which is characterized in that the NH4HCO3The grain of powder
Diameter is 20-30 μm.
8. a kind of preparation method of bidirectional joint according to claim 4, which is characterized in that the NH4HCO3The matter of powder
Amount is the 10-15% of aluminum alloy materials quality.
9. a kind of preparation method of bidirectional joint according to claim 4, which is characterized in that the heat treatment is relapsing fever
Processing, the retrogression heat treatment specifically include four-stage: the first stage: temperature is 450-460 DEG C, time 1-1.5h；The
Two-stage: temperature is 100-110 DEG C, time 13-13.5h；Phase III: temperature is 180-185 DEG C, time 10-
12min；Fourth stage: temperature is 100-110 DEG C, time 13-13.5h.
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| CN201811288705.2A CN109280817A (en) | 2018-10-31 | 2018-10-31 | A kind of bidirectional joint |
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|---|---|---|---|---|
| JP2004522854A (en) * | 2000-12-20 | 2004-07-29 | アルカン・インターナショナル・リミテッド | Age hardening aluminum alloy |
| CN102168195A (en) * | 2011-04-13 | 2011-08-31 | 南京航空航天大学 | Method for preparing gradient porous Ti-Mg-based composite material |
| CN106402341A (en) * | 2016-10-14 | 2017-02-15 | 南京创贝高速传动机械有限公司 | High-speed gearbox matched with high-speed fan for use |
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|---|---|---|---|---|
| JP2004522854A (en) * | 2000-12-20 | 2004-07-29 | アルカン・インターナショナル・リミテッド | Age hardening aluminum alloy |
| CN102168195A (en) * | 2011-04-13 | 2011-08-31 | 南京航空航天大学 | Method for preparing gradient porous Ti-Mg-based composite material |
| CN106402341A (en) * | 2016-10-14 | 2017-02-15 | 南京创贝高速传动机械有限公司 | High-speed gearbox matched with high-speed fan for use |
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