CN104309265A - Extrusion method of metal composite board - Google Patents
Extrusion method of metal composite board Download PDFInfo
- Publication number
- CN104309265A CN104309265A CN201410608275.3A CN201410608275A CN104309265A CN 104309265 A CN104309265 A CN 104309265A CN 201410608275 A CN201410608275 A CN 201410608275A CN 104309265 A CN104309265 A CN 104309265A
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- Prior art keywords
- metal block
- extruding
- composite panel
- pressing method
- metallic composite
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses an extrusion method of a metal composite board. The extrusion method of metal composite board comprises the following steps: firstly, laminating and fixing homogeneous or heterogeneous metal blocks together; secondly, adding the raw material into an extruding barrel for extruding, and extruding the homogeneous or heterogeneous metal blocks from an extruding mould port simultaneously in the extruding process to obtain an extruded composite board, wherein in the extruding process, macroscopic sliding between the metal blocks on the two sides of each contact interface between the metal blocks does not exist, and extruding flow velocity difference of the same metal block between a position near the contact interface and a position far away from the contact interface exists. According to the extrusion method of the metal composite board, relatively large shear stress is introduced into the same metal block, so that grains can be significantly refined and the texture can be significantly weakened; according to the extrusion method of the metal composite board, only an extruding composite way is required to be changed and the extruding barrel is not required to be redesigned, so that the extrusion method of the metal composite board has relatively high production and research values.
Description
Technical field
The invention belongs to metal and alloy field, relate to metal forming process, particularly the method for metallic composite panel is produced in synchronous extrusion process.
Background technology
Magnesium alloy has specific strength, specific stiffness is high, thermal conductivity and damping vibration attenuation performance good, the advantages such as capability of electromagnetic shielding and machinability are excellent, are with a wide range of applications in each fields such as space flight and aviation, automobile, electrical equipment, communications.Because the crystal structure of magnesium alloy is close-packed hexagonal, lack independently slip system, therefore process more difficult.Up to the present, most of magnesium-alloy material is mainly through Foundry Production, but cast article exists organizes the shortcomings such as thick, defect is more, thus cause its mechanical property not ideal enough, greatly constrain the extensive use of magnesium alloy, and deformation processing magnesium alloy there is higher mechanical property than cast magnesium alloy.The more magnesium alloy deformation processing mode of current application is mainly roll forming and extrusion molding, but rolling mill practice more complicated, the production cycle is long, production efficiency is low, and product recovery rate is low, and ultimate cost is very high, and the large area having a strong impact on magnesium alloy plate uses.Compared with rolling, during extrusion process, material deforms under three-dimensional stress state, can be once extruded, and production efficiency is high; Meanwhile, the flexibility of extrusion process is large, can produce the product of shape of cross section complexity.Therefore, the mechanical property studying magnesium alloy extrusion sheet material has important meaning.
At present, magnesium alloy plate crimp mainly adopts single ingot casting directly to put into mould to carry out symmetrical forward extrusion, although extrusion process is simple, easy to operate, but the sheet material mechanical property obtained is limited, and there is comparatively serious basal plane texture, can not meet the need of market.
The purposes of magnesium-aluminium composite material (particularly composite board, bar) is very extensive, but commonsense method is difficult to produce satisfactory magnesium-aluminium composite material.For this reason, University Of Chongqing's gold-tinted victory and prosperous wait people the to individually disclose a kind of method (details application reference number 200610054269.3 " a kind of magnalium composite bimetal pipe/bars ", application number 201410152407.6 " a kind of magnalium multilayer composite board and processing method thereof ") that hollow aluminium ingot parcel magnesium ingot synchronously extrudes production magnesium-aluminium composite material of letter fortune.Although magnesium and aluminium are all synchronously added extruder and extrude by these two kinds of methods, but its object mainly forms aluminium alloy protective layer in magnesium alloy appearance, thus improve its resistance to corrosion, and magnesium alloy is completely coated by aluminium alloy in these two kinds of methods, in extrusion process, the lateral flow of magnesium alloy extrusion sheet material is subject to aluminum material coated restriction, very easily produce cross direction profiles uneven, finally cause whole composite horizontal organization and performance uneven, anisotropy is serious, is not well positioned to meet instructions for use; In addition, in this method extrusion process, magnesium alloy entirety does not contact with recipient, and it is in stress symmetric state (deformation process of magnesium alloy and the symmetrical extrusion type of ordinary magnesium alloy seemingly, can not improve the basal plane texture of magnesium alloy) along thickness direction.
Summary of the invention
In view of this, the object of the present invention is to provide the pressing method of metallic composite panel.
For achieving the above object, the invention provides following technical scheme:
The pressing method of metallic composite panel, is stacked together of the same race or dissimilar metal block and extrudes simultaneously, and in extrusion process, the metal derby of both sides, each metal block contact interface slides without macroscopic view.
Preferably, in extrusion process, same metal derby extrudes current difference near contact interface place with existing away from contact interface place.
Preferably, first get of the same race or dissimilar metal block and be stacked together and fix, then raw material are added recipient and extrude, in extrusion process, of the same race or dissimilar metal block is extruded from extruding die orifice simultaneously, obtains Compound Extrusion sheet material.
Preferably, also comprise before stacking of the same race or dissimilar metal block and carry out cleaning smooth step to each metal block contact face.
Preferably, the step that metal derby is heated also is comprised after stacking of the same race or dissimilar metal block.
Preferably, the number of plies of the metal derby be stacked together is layer 2-4, and the thickness of each layer is identical or different.
Preferably, described of the same race or dissimilar metal block is magnesium alloy or aluminium alloy.
Preferably, described of the same race or dissimilar metal block is AZ31 magnesium alloy, AZ61 magnesium alloy or aluminium alloy.
Beneficial effect of the present invention is:
The pressing method of metallic composite panel of the present invention, same or non-same material are stacked together and carry out Compound Extrusion, due to Presence of an interface between sheet metal, can not be there is the material micromixing along sheet metal thickness direction in different metal block/plate, lateral flow and thick in thinning only occurs under extruding force effect in extrusion process;
The pressing method of metallic composite panel of the present invention, the metal flow rates of the near interface of adjacent metal block is substantially identical (frictional force in extrusion between adjacent metal block is extremely strong); If adjacent two metal derbies are different alloys, because the forming property between different metal block exists notable difference, its overall flow speed is different, if easily flowing metal bulk velocity is V 1, difficult flowing metal bulk velocity is V
2, boundary velocity is V, then V
1> V > V2, namely now there is flowing velocity difference in same metal derby inside; This is conducive to Refining Mg Alloy crystal grain, weakens its texture.
If adjacent metal block is same alloy, the alloy of interface is only along the flowing of the direction of extrusion, and recipient is to the frictional force of interface opposite side in addition, makes the flowing velocity of interface alloy along the direction of extrusion there is notable difference with the speed near barrel place; Also can form gradient shear stress in same metal derby inside, this stress is in asymmetric state, equally can effectively crystal grain thinning, reduction texture.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is that embodiment 1 cast metals stacks schematic diagram;
Fig. 2 is that embodiment 2 cast metals stacks schematic diagram;
Fig. 3 is that embodiment 3 cast metals stacks schematic diagram;
Fig. 4 is that embodiment 4 cast metals stacks schematic diagram;
Fig. 5 is the metallograph that embodiment 1 extrudes gained sheet metal;
Fig. 6 is the metallograph that embodiment 2 extrudes gained sheet metal;
Fig. 7 is the metallograph that embodiment 3 extrudes gained sheet metal;
Fig. 8 is the metallograph that comparative example 1 extrudes gained sheet metal.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment 1:
The pressing method of the present embodiment metallic composite panel, comprises the following steps:
1) get two pieces of measure-alike cylindrical magnesium alloy ingots and aluminium alloy cast ingot and cut open along axis;
2) cleaning step 1) split surface of gained semi-cylindrical magnesium alloy and aluminium alloy cast ingot polishing be to smooth;
3) by step 2) semi-cylindrical magnesium alloy after polishing is stacked together with aluminium alloy cast ingot, and (cutting plane is relative, as shown in Figure 1) and fix (avoiding producing macroscopical relative sliding in extrusion process) with aluminium wire;
4) by step 3) complex be heated to 380 DEG C of insulation 1h and be placed on pressurizing unit and extrude;
5) 400 DEG C of temper steps 4) sheet material extruded obtains product.
Embodiment 2:
The pressing method of the present embodiment metallic composite panel, comprises the following steps:
1) two pieces of semi-cylindrical AZ31 magnesium alloy ingots and AZ61 magnesium alloy ingot (two extrusion ingot length, diameter, cross section chord length are identical, and volume is different) is got respectively;
2) cleaning step 1) split surface of gained semi-cylindrical AZ31 magnesium alloy ingot and AZ61 magnesium alloy ingot polishing be to smooth;
3) by step 2) semi-cylindrical AZ31 magnesium alloy ingot after polishing is stacked together with AZ61 magnesium alloy ingot, and (cutting plane is relative, as shown in Figure 2) and fix (avoiding producing macroscopical relative sliding in extrusion process) with aluminium wire;
4) 400 DEG C of pressing steps 3) complex obtain product.
Embodiment 3:
The pressing method of the present embodiment metallic composite panel, comprises the following steps:
1) same cylindrical AZ31 magnesium alloy ingot is divided into two parts along axis;
2) cleaning step 1) the split surface of two semi-cylindrical AZ31 magnesium alloy ingots and polishing to smooth;
3) by step 2) two semi-cylindrical AZ31 magnesium alloy ingots after polishing are stacked together, and (cutting plane is relative, as shown in Figure 3) and fix (avoiding producing macroscopical relative sliding in extrusion process) with aluminium wire;
4) 400 DEG C of pressing steps 3) complex obtain product.
Embodiment 4:
The pressing method of the present embodiment metallic composite panel, comprises the following steps:
1) AZ31 casting of magnesium alloy ingot bar and two AZ61 casting of magnesium alloy ingot bars are got respectively;
2) polish cleaning step 1) AZ31 magnesium alloy ingot and AZ61 magnesium alloy ingot;
3) by step 2) AZ31 magnesium alloy ingot be stacked together with AZ61 magnesium alloy ingot that (cutting plane is relative, as shown in Figure 4) and fix with aluminium wire;
4) by step 3) complex be heated to 400 DEG C insulation 1h after extrude to obtain product.
Comparative example 1:
Common symmetric extruding is carried out in 400 DEG C after getting the polishing of cylindrical AZ31 magnesium alloy ingot.
Performance test:
Example 1-3 and comparative example 1 gained sheet material carry out metallographic structure analysis and Mechanics Performance Testing, and result is as shown in Fig. 5-8 and following table:
Fig. 5 is the metallograph of embodiment 1 gained sheet material, and what in figure, color was darker is aluminium alloy; Can find out, the crystal grain of magnesium alloy side is comparatively tiny, there is obvious compound interface in the composite board of magnesium alloy and aluminium, but interface combines closely, and both sides, interface crystal grain is tiny.
Fig. 6 is the metallograph of embodiment 2 gained sheet material, and in figure, left part is AZ61, and right side is AZ31 magnesium alloy, in figure, the compound interface of AZ31 and AZ61 is not obvious, can see that microcosmic combines, and the crystal grain of junction is more tiny, this is conducive to the lifting of mechanical property.
Fig. 7 is the metallograph of embodiment 3 gained sheet material, therefrom can find out, does not find obvious compound interface in the composite board of AZ31 and AZ31, but crystal grain entirety is tiny.
Fig. 8 is the metallograph of comparative example 1 gained magnesium alloy plate.
Comparison diagram 5-8 can find out, the crystal grain of embodiment 1-3 gained sheet material is evenly tiny, and its interface cohesion is tight, not easily peels off.
| Classification | Tensile strength/MPa | Yield strength/MPa | Percentage elongation/% |
| Comparative example 1 | 248.5 | 163.3 | 17.1 |
| Embodiment 1 | 302.4 | 164.7 | 19.6 |
| Embodiment 2 | 281.0 | 145.0 | 21.7 |
| Embodiment 3 | 273.0 | 149.1 | 22.0 |
As can be seen from the above table, compared with comparative example 1, the yield strength of embodiment 1-3 gained Compound Extrusion plate reduces, and tensile strength and percentage elongation raise, and comprehensive mechanical property is obviously high than the AZ31 sheet material of common extruding.
Same or non-same material are stacked together and carry out Compound Extrusion by above-described embodiment, and due to Presence of an interface between sheet metal, different metal block/plate, in extrusion process, relative flowing can not occur; There is larger shear stress between same metal derby in extrusion process, thus play crystal grain thinning, the effect of reduction texture.
The pressing method of the present embodiment metallic composite panel only need change extrusion cladding mode, without the need to redesigning recipient, has stronger production and researching value.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (8)
1. the pressing method of metallic composite panel, is characterized in that: of the same race or dissimilar metal block are stacked together extrudes simultaneously, in extrusion process both sides, each metal block contact interface metal derby between without macroscopical whole slide.
2. the pressing method of metallic composite panel according to claim 1, is characterized in that: extrude current difference near contact interface place with existing away from contact interface place in same metal derby in extrusion process.
3. the pressing method of metallic composite panel according to claim 1, it is characterized in that: first get of the same race or dissimilar metal block and be stacked together and fix, then raw material are added recipient to extrude, in extrusion process, of the same race or dissimilar metal block is extruded from extruding die orifice simultaneously, obtains Compound Extrusion sheet material.
4. the pressing method of metallic composite panel according to claim 3, is characterized in that: also comprise before stacking of the same race or dissimilar metal block and carry out cleaning smooth step to each metal block contact face.
5. the pressing method of metallic composite panel according to claim 3, is characterized in that: also comprise the step heated metal derby after stacking of the same race or dissimilar metal block.
6. the pressing method of metallic composite panel according to claim 3, is characterized in that: the number of plies of the metal derby be stacked together is layer 2-4, and the thickness of each layer is identical or different.
7. the pressing method of metallic composite panel according to claim 1-6 any one, is characterized in that: described of the same race or dissimilar metal block is magnesium alloy or aluminium alloy.
8. the pressing method of metallic composite panel according to claim 1-6 any one, is characterized in that: described of the same race or dissimilar metal block is AZ31 magnesium alloy, AZ61 magnesium alloy or aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410608275.3A CN104309265A (en) | 2014-10-30 | 2014-10-30 | Extrusion method of metal composite board |
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| CN201410608275.3A CN104309265A (en) | 2014-10-30 | 2014-10-30 | Extrusion method of metal composite board |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499544A (en) * | 2015-12-23 | 2016-04-20 | 上海交通大学 | Method for preparing double-metal composite material by solid-liquid combination of solid-state titanium material and extruding composition |
| CN107486477A (en) * | 2017-09-29 | 2017-12-19 | 山东大学 | A kind of Al/Mg/Al composite boards bridge die extrusion building mortion and method |
| CN107497874A (en) * | 2017-08-04 | 2017-12-22 | 重庆大学 | A kind of pressing method using curved interface structure regulating magnesium alloy plate texture |
| CN113858725A (en) * | 2021-09-28 | 2021-12-31 | 长沙新材料产业研究院有限公司 | Multilayer composite board and preparation method thereof |
| CN113857252A (en) * | 2021-09-28 | 2021-12-31 | 长沙新材料产业研究院有限公司 | Multilayer composite sheet and preparation method thereof |
| CN114226454A (en) * | 2021-09-28 | 2022-03-25 | 长沙新材料产业研究院有限公司 | Composite material and preparation method thereof |
| CN114226481A (en) * | 2021-09-28 | 2022-03-25 | 长沙新材料产业研究院有限公司 | Composite material and preparation method thereof |
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| WO2008107000A1 (en) * | 2007-03-08 | 2008-09-12 | Alcan Technology & Management Ltd. | Method for plating an aluminum alloy profile |
| CN104399767A (en) * | 2014-10-30 | 2015-03-11 | 重庆大学 | Method for extruding fine grain magnesium alloy sheet material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499544A (en) * | 2015-12-23 | 2016-04-20 | 上海交通大学 | Method for preparing double-metal composite material by solid-liquid combination of solid-state titanium material and extruding composition |
| CN107497874A (en) * | 2017-08-04 | 2017-12-22 | 重庆大学 | A kind of pressing method using curved interface structure regulating magnesium alloy plate texture |
| CN107497874B (en) * | 2017-08-04 | 2019-02-26 | 重庆大学 | A kind of pressing method using curved interface structure regulating magnesium alloy plate texture |
| CN107486477A (en) * | 2017-09-29 | 2017-12-19 | 山东大学 | A kind of Al/Mg/Al composite boards bridge die extrusion building mortion and method |
| CN107486477B (en) * | 2017-09-29 | 2018-12-18 | 山东大学 | A kind of Al/Mg/Al composite board bridge die extrusion forming device and method |
| CN113858725A (en) * | 2021-09-28 | 2021-12-31 | 长沙新材料产业研究院有限公司 | Multilayer composite board and preparation method thereof |
| CN113857252A (en) * | 2021-09-28 | 2021-12-31 | 长沙新材料产业研究院有限公司 | Multilayer composite sheet and preparation method thereof |
| CN114226454A (en) * | 2021-09-28 | 2022-03-25 | 长沙新材料产业研究院有限公司 | Composite material and preparation method thereof |
| CN114226481A (en) * | 2021-09-28 | 2022-03-25 | 长沙新材料产业研究院有限公司 | Composite material and preparation method thereof |
| CN113857252B (en) * | 2021-09-28 | 2023-09-19 | 航天科工(长沙)新材料研究院有限公司 | Multilayer composite sheet and preparation method thereof |
| CN113858725B (en) * | 2021-09-28 | 2024-01-30 | 航天科工(长沙)新材料研究院有限公司 | Multilayer composite board and preparation method thereof |
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