CN106670474A - Preparation method of foam aluminum sandwich panel - Google Patents
Preparation method of foam aluminum sandwich panel Download PDFInfo
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- CN106670474A CN106670474A CN201611248905.6A CN201611248905A CN106670474A CN 106670474 A CN106670474 A CN 106670474A CN 201611248905 A CN201611248905 A CN 201611248905A CN 106670474 A CN106670474 A CN 106670474A
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- Prior art keywords
- preparation
- foaming
- expandable
- precast body
- powder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
- B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
- B22F7/006—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part the porous part being obtained by foaming
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- 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)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention provides a preparation method of a foam aluminum sandwich panel. The preparation method includes the steps that (1) aluminum-silicon alloy powder and a foaming agent are mixed evenly to obtain a mixture, wherein the foaming agent accounts for 0.4% to 1% of the total mass of the aluminum-silicon alloy powder and the foaming agent; (2) mixed powder is added into an aluminum pipe with one end closed, an inlet is closed, and a preformed unit is obtained; (3) the preformed unit is subject to cold rolling, and a prefabricated body capable of foaming is obtained; and (4) the prefabricated body capable of foaming is led into an ultrasonic field for collaborative foaming in the foaming process, and the foam aluminum sandwich panel is obtained. The preparation method has the beneficial effects of being controllable in preparation, low in cost, stable in structure, good in mechanical property and the like.
Description
Technical field
The present invention relates to a kind of preparation field of porous metal material, more particularly to a kind of preparation side of foam aluminum sandwich
Method.
Background technology
Foam aluminum sandwich is a kind of advanced composite material (ACM) of structure-function integration, both macroscopically has sandwich structure
Compound characteristics, and while foamed aluminium material own characteristic is given full play to, solve single foamed aluminium intensity relatively low, it is difficult to
The problems such as connection, with light weight, energy absorbing efficiency is high, specific stiffness is higher the features such as, can be widely used in Aero-Space manufacture, track
The fields such as traffic, sea-freight, military equipment.But the stability of foam, foam structure, size, the control of uniformity and reappearance
The problems such as difference, constrains the development and its application of foam aluminum sandwich industrialization always, therefore the growth course of control foam and steady
It is qualitative be foam aluminum sandwich preparation in one of the key issue to be solved.
At present, the preparation method of foam aluminum sandwich is broadly divided into two major classes, and a class is first to obtain foam metal bare board, then
The method being attached by different connection methods from metal decking.There is the cleaning of foamed aluminium board connection surface in this kind of method
The problems such as unnet, non-face contact of combination interface, and also there is non-refractory, easily in the battenboard that wherein prepared by bonding method
Aging the shortcomings of)；Another kind of is direct foaming, prepares expandable precast body reheating precast body and is foamed, infusion pending
Foamed in the aluminum melt with certain viscosity while decomposition, foam aluminum sandwich is prepared in finally cooling, directly
Foam aluminum sandwich is obtained to obtain, the foaming process of core belongs to the direct foaming of powder metallurgy in such method, due to its preformation
Type, integration and the features such as shape only, have obtained the attention of numerous researchers.Made by " the direct foaming of powder metallurgy "
The standby foam aluminium sandwich structure material with metallurgical bonding interface so that the bulk strength of battenboard is improved, and high temperature resistant is not
It is easily aging, a kind of extremely potential advanced composite material (ACM) is had been considered as, it is also that porous foam metal material scale should
Important development direction.But its foaming process is an extremely complex process, its control is directly connected to battenboard
Quality.Nowadays the cell morphology of precise control battenboard, macrostructure and problem in terms of its basal body structure is strengthened always
Fail thoroughly solution.
The current research both at home and abroad to the growth course and stability of foam is a lot, the main control method for proposing now
Be introduce external substance come increase the viscosity and surface tension of melt so as to improve melt stability or addition Ca, Mg,
SiC、Al2O3Deng solid particle and fiber etc..But, lacking for foam aluminum sandwich cell morphology, structure is effective with tissue
Control device, and this is industrialized key point, it is necessary to a kind of effective method is improved.
The content of the invention
In view of this, the present invention provides a kind of Stability Analysis of Structures, and stomata is uniform, the foam aluminum sandwich of good mechanical properties
Preparation method.
To solve above technical problem, the technical scheme is that using a kind of preparation method of foam aluminum sandwich,
Including：
1), alusil alloy powder is well mixed with foaming agent, compound is obtained, wherein the foaming agent accounts for alusil alloy
0.4~1wt% of powder and the foaming agent gross mass；
2), in the aluminum pipe for adding one end to close the mixed-powder, and buckle closure will be entered close, obtain prefabricated component；
3), the prefabricated component is carried out cold rolling, obtains expandable precast body；
4) the expandable precast body, is imported into ultrasonic field coordination foaming control, foam aluminum sandwich is obtained.
Preferably, the alusil alloy Al：Si mass ratioes are (7~18):1.
Preferably, the foaming agent is titantium hydride.
Preferably, step 2) it is specially：
By the compound be placed in inwall cleaning after, and one end closing aluminium shape tube in after by other port suppress seal
Close；The wall thickness of the aluminium shape tube is 1~2.5mm.
Preferably, step 3) it is specially：
The prefabricated component is cold rolling under the pressure that pressure is 30~100T, obtain expandable precast body；It is described cold rolling
Reduction ratio is 60~80%.
Preferably, the sandwich layer powder relative density of the expandable precast body is more than 85%.
Preferably, step 4) it is specially：
The expandable precast body is foamed, ultrasonic field is imported in foaming process, obtained the battenboard that foams, it is described super
The importing power of sound field is 100~1000W, and the time is 10~120s.
Preferably, the blowing temperature is 660~720 DEG C, and foamed time is 30~120s.
Preferably, the blowing temperature is 680~710 DEG C, and foamed time is 50~100s,
Preferably, the importing power of the ultrasonic field is 200~800W, and the time is 10~120s.
The invention provides a kind of preparation method of foam aluminum sandwich, including：1), by alusil alloy powder and foaming agent
It is well mixed, obtain compound, wherein the foaming agent account for alusil alloy powder and the foaming agent gross mass 0.4~
1wt%；2), in the aluminum pipe for adding one end to close the mixed-powder, and entrance is closed, obtains prefabricated component；3), will be described
Prefabricated component carries out cold rolling, obtains expandable precast body；4), the expandable precast body is foamed in ultrasonic field, foam is obtained
Aluminum sandwich panel.Preparation method of the invention passes through ultrasonic field coordination and foams with interference TiH2The function of decomposable process, promotes H2's
Resolution ratio and utilization rate；Ultrasonic field is conducive to smashing big bubble in foaming process, makes bubble homoepitaxial, it is to avoid big is logical
The abscess of hole and breakage is formed；Ultrasonic field can also obtain good performance effect, with controllable to matrix grain structure refinement
The features such as standby, with low cost, Stability Analysis of Structures, preferable mechanical property, the extensive concern of researcher is caused in recent years.
The foam aluminum sandwich prepared by ultrasonic field coordination foaming process, proposition is corresponding with the method most preferably to be prepared
Technological parameter, can prepare average pore size for 1~3mm, and the averag density of foam aluminum sandwich is 0.6~1.5g/cm3, bubble
The sandwich layer averag density of foam aluminum sandwich panel is 0.2~0.8g/cm3Interface realize metallurgical binding and crystal grain is tiny, with equiaxial
The quality material of brilliant tissue characteristic, the method is easy and effective, the production practices of the foam aluminum sandwich prepared to powder metallurgic method
Certain directive function can be played, the method not only may apply to the foam metal material of Al-Si bases, also be in other metals
The preparation of base foamed material provides a kind of new method, with broad prospect of application.
Brief description of the drawings
Fig. 1, for embodiment 1 prepare foam aluminum sandwich foaming structure schematic diagram；
Fig. 2, the microscopic appearance for the foaming initial stage of embodiment 1；
Fig. 3, for embodiment 2 prepare foam aluminum sandwich foaming structure schematic diagram；
Fig. 4, the microscopic appearance for the foaming initial stage of embodiment 2；
Fig. 5, for comparative example 1 prepare foam aluminum sandwich foaming structure schematic diagram；
Fig. 6, the microscopic appearance for the foaming initial stage of comparative example 1.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment
The present invention is described in further detail.
It is the foam aluminum sandwich of 1mm that embodiment 1 prepares average pore size
Weigh the alusil alloy powder (Al of certain mass：Si mass percents：7:1) particle diameter is 50~200 μm, foaming agent
Titanium hydride powders powder diameter is 50~150 μm, is well mixed with titanium hydride powders, and wherein titanium hydride powders account for the total matter of powder
0.4~1w.t.% of amount, the powder after being well mixed pours into inwall cleaning (electrochemical deoiling) and the wall thickness of one end closing is 1
In~2.5mm aluminium shape tubes, then other port is suppressed and is closed；Blank after powder filling is encapsulated uses 60 on milling train
It is cold rolling that~80% rolling reduction ratio carries out single, and draught pressure is 30~100T, it is ensured that precast body sandwich layer powder relative density
More than 85%, the composite plate obtained after rolling cuts into expandable precast body by along side；Expandable precast body is placed in induction furnace
In foamed, import ultrasonic field in foaming process, the power that ultrasonic field is imported is 200~800W, and the time is 10~120s.
Fig. 1 is sample in embodiment 1, and Fig. 2 is the microscopic appearance at foaming initial stage.
It is the foam aluminum sandwich of 2mm that embodiment 2 prepares average pore size
Weigh the alusil alloy powder (Al of certain mass：Si mass percents：11:1) particle diameter is 50~200 μm, foaming
Agent titanium hydride powders powder diameter is 50~150 μm, is well mixed with titanium hydride powders, and wherein to account for powder total for titanium hydride powders
0.4~1w.t.% of quality, the powder after being well mixed pours into inwall cleaning (electrochemical deoiling) and the wall thickness of one end closing is
In 1~2.5mm aluminium shape tubes, then other port is suppressed and is closed；Blank after powder filling is encapsulated is used on milling train
It is cold rolling that 60~80% rolling reduction ratio carries out single, and draught pressure is 30~100T, it is ensured that precast body sandwich layer powder is relatively close
Degree is more than 85%, and the composite plate obtained after rolling cuts into expandable precast body by along side；Expandable precast body is placed in sensing
Foamed in stove, blowing temperature is 660~720 DEG C, and foamed time is 30~120s, and ultrasonic field is imported in foaming process,
The power that ultrasonic field is imported is 200~800W, and the time is 10~120s.Fig. 3 is sample in embodiment 2, and Fig. 3 is the foaming initial stage
Microscopic appearance.
Comparative example 1
Weigh the alusil alloy powder (Al of certain mass：Si mass percents：7:1) particle diameter is 50~200 μm, foaming agent
Titanium hydride powders powder diameter is 50~150 μm, is well mixed with titanium hydride powders, and wherein titanium hydride powders account for the total matter of powder
0.4~1w.t.% of amount, the powder after being well mixed pours into inwall cleaning (electrochemical deoiling) and the wall thickness of one end closing is 1
In~2.5mm aluminium shape tubes, then other port is suppressed and is closed；Blank after powder filling is encapsulated uses 60 on milling train
It is cold rolling that~80% rolling reduction ratio carries out single, and draught pressure is 30~100T, it is ensured that precast body sandwich layer powder relative density
More than 85%, the composite plate obtained after rolling cuts into expandable precast body by along side；Expandable precast body is placed in induction furnace
In foamed, blowing temperature be 660~720 DEG C, foamed time is 30~120s.Fig. 5 is sample in comparative example 1, and Fig. 6 is hair
The microscopic appearance at bubble initial stage.
By the comparing of Fig. 1,3 and Fig. 5 can be seen that using the inventive method prepare foam aluminum sandwich aperture compared with
It is the continuous macropore of homogeneous and no appearance, illustrates that product prepared by the preparation method of present invention offer solves existing skill really
Art problem.Contrast according further to Fig. 2,4 and 6 is it is also seen that from microcosmic point, its aperture is also comparatively homogeneous.So this
The preparation method enhancing macrostructure and its basal body structure for providing are invented, because aperture is homogeneous, without continuous not of uniform size
Hole occurs, so its stress is more uniform, be not in defect point, improve the mechanical property of foam aluminum sandwich.
The above is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred embodiment is not construed as
Limitation of the invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of foam aluminum sandwich, it is characterised in that including：
1), alusil alloy powder is well mixed with foaming agent, compound is obtained, wherein the foaming agent accounts for alusil alloy powder
With 0.4~1wt% of the foaming agent gross mass；
2), in the aluminum pipe for adding one end to close the mixed-powder, and entrance is closed, obtains prefabricated component；
3), that the prefabricated component carried out into single is cold rolling, obtains expandable precast body；
4) the expandable precast body, is imported into ultrasonic field coordination foaming, foam aluminum sandwich is obtained.
2. preparation method according to claim 1, it is characterised in that the alusil alloy Al：Si mass ratioes for (7~
18):1。
3. preparation method according to claim 1, it is characterised in that the foaming agent is titantium hydride.
4. preparation method according to claim 1, it is characterised in that step 2) it is specially：
By the compound be placed in inwall cleaning after, and one end closing aluminium shape tube in after by other port suppress close；
The wall thickness of the aluminium shape tube is 1~2.5mm.
5. preparation method according to claim 1, it is characterised in that step 3) it is specially：
The prefabricated component is cold rolling under the pressure that pressure is 30~100T, obtain expandable precast body；The cold rolling pressure
Rate is 60~80%.
6. preparation method according to claim 1, it is characterised in that the sandwich layer powder of the expandable precast body is relatively close
Degree is more than 85%.
7. preparation method according to claim 1, it is characterised in that step 4) it is specially：
The expandable precast body is foamed, ultrasonic field Collaborative Control is imported in foaming process, obtained foam battenboard, institute
The importing power of ultrasonic field is stated for 100~1000W, the time is 10~120s.
8. preparation method according to claim 7, it is characterised in that the blowing temperature is 660~720 DEG C, during foaming
Between be 30~120s.
9. preparation method according to claim 8, it is characterised in that the blowing temperature is 680~710 DEG C, during foaming
Between be 50~100s.
10. preparation method according to claim 7, it is characterised in that the importing power of the ultrasonic field is 200~
800W, the time is 10~120s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611248905.6A CN106670474A (en) | 2016-12-29 | 2016-12-29 | Preparation method of foam aluminum sandwich panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611248905.6A CN106670474A (en) | 2016-12-29 | 2016-12-29 | Preparation method of foam aluminum sandwich panel |
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| CN201611248905.6A Pending CN106670474A (en) | 2016-12-29 | 2016-12-29 | Preparation method of foam aluminum sandwich panel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526466A (en) * | 2018-04-10 | 2018-09-14 | 安徽宏志建材科技有限公司 | Core material for sandwich panel and preparation method thereof |
| CN108705084A (en) * | 2018-05-22 | 2018-10-26 | 东北大学 | A kind of preparation method of industrial large scale foam aluminum sandwich |
| CN112522694A (en) * | 2020-11-17 | 2021-03-19 | 东北大学 | Foamed aluminum sandwich plate surface blackening foaming method based on rapid heat transfer |
| CN114273657A (en) * | 2020-10-01 | 2022-04-05 | 通用汽车环球科技运作有限责任公司 | Metal foam extrusion process and articles made therefrom |
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Application publication date: 20170517 |