CN106494032B - A kind of layer structure composite material of magnesium alloy and preparation method thereof - Google Patents
A kind of layer structure composite material of magnesium alloy and preparation method thereof Download PDFInfo
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- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
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- B32B2307/00—Properties of the layers or laminate
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Abstract
The invention belongs to field of alloy material, and in particular to a kind of layer structure composite material of magnesium alloy and preparation method thereof.The composite material includes at least two stratiform constituent elements, and by inlaying casting metallurgical binding together between each layer, transition zone is to be made of the sub-layer of at least three kinds of different structures, strip precipitate dispersion layer, no precipitation layer and graininess precipitate dispersion layer.The composite construction magnesium alloy plate of the present invention, using high-strength magnesium-rare earth as middle layer entirety load, using plasticity, preferably conventional magnesium alloy improves the moulding of composite material entirety as covering material, conventional magnesium alloy can be overcome to use the disadvantages such as existing intensity as structural material, and the performance advantages such as the mechanics of magnesium-rare earth are made full use of, compared to all substantially cost-effective using magnesium-rare earth while meeting structural material high-strength light demand.The composite construction magnesium alloy plate of the present invention can be widely applied to lightweight structure part field.
Description
Technical field
The invention belongs to field of alloy material, and in particular to a kind of layer structure composite material of magnesium alloy and its preparation side
Method.
Background technology
Mg/Mg laminar composites are so that two kinds of identical or different magnesium alloy metal layers is securely tied using complex technique
It is combined, constituent element is a kind of composite material of layered distribution, compound between identical magnesium alloy, mainly utilizes Hot pressing diffusion
Or the crystallite dimension of other large deformation means Refining Mg Alloys, improve the mechanical property of magnesium alloy.Between different magnesium alloys
It is compound, mainly learnt from other's strong points to offset one's weaknesses in performance using the different magnesium alloy of physics, chemistry, mechanical property, generates synergistic effect, make
The overall performance for obtaining composite material is better than group element material.Due to excellent combination property, Mg/Mg laminar composites are more next in recent years
More paid much attention to by domestic and international scientist, is expected to be applied in fields such as defence and military, aerospace, automobile, electronics.
One important potential application example is used as armoring bullet resistant material.In energy shortage weapon system loss of weight active demand
Under overall background, the conventional magnesium alloy armour plate such as AZ31B-H24 and ZK60 substitutes 5083-H131 and aging state 7075 respectively at present
Aluminum alloy armor plate, but the shortcomings of conventional magnesium alloy armour plate intensity is low, creep-resistant property is poor strongly limit its as armoring
The advantage that material lightweight shows.Magnesium-rare earth, such as Mg-Gd-Y-Zr, excellent room temperature elevated temperature strength, high creep resistant
Performance, good heat-resisting and corrosion resisting property become the first choice for substituting conventional magnesium alloy as armoring bullet resistant material.However, dilute
The problems such as native magnesium alloy production cost is high, plasticity is poor, difficult deformation is than more prominent.The Al/Al stratiforms that borrow has obtained application are multiple
Attach together the design concept on deck.Meet anti-bullet penetration requirement using high-strength magnesium-rare earth as middle layer, it is more preferable using plasticity
Conventional magnesium alloy meet anti-avalanche requirement as the backing layer on magnesium-rare earth both sides, utilize complex technique to prepare conventional magnesium and close
Gold/magnesium-rare earth armour plate can overcome conventional magnesium alloy to use the disadvantages such as existing intensity as armour material, and abundant
The performance advantages such as the mechanics using magnesium-rare earth, compared to all using dilute while meeting Weapon Components high-strength light demand
Native magnesium alloy is substantially cost-effective.Therefore, carry out conventional magnesium alloy/magnesium-rare earth laminar composite research with very heavy
The engineering significance wanted.
Invention content
To solve above-mentioned technical problem, the present invention provides layer structure composite material of magnesium alloy, has intensity height, heat resistance
Can be good the features such as.
A kind of layer structure composite material of magnesium alloy, which is characterized in that including：First compound constituent element, the second compound constituent element
And the first bonding interface layer between compound constituent element and the second compound constituent element, the first compound constituent element is magnesium-rare earth material
Material, the second compound constituent element are that deformation is magnesium alloy materials；The bonding interface layer includes：Strip precipitate dispersion layer, without precipitation
Layer and graininess precipitate dispersion layer.
The deformation is that the elongation percentage of magnesium alloy is more than or equal to 10%；The room temperature tensile strength of the magnesium-rare earth is more than
Equal to 220MPa, 125 DEG C of tensile strength are 175MPa or more.
The deformation is that other alloy element Als, Zn, Mn, the Li et al. of magnesium alloy are no more than weight 10%.
The thickness of the bonding interface layer is：25~500um.
Deformation is the mechanical property aspect index of magnesium alloy interface quality：The tensile strength of 1 its vertical interface layer is big
The tensile strength of wrought magnesium alloy under the same terms, the far super deformed magnesium alloy of shear strength, can reach cutting for magnesium-rare earth
85% or more of shearing stress.
It includes Mg-Al systems, Mg-Zn- systems, Mg-Mn systems etc. that the deformation, which is magnesium alloy,.
The magnesium-rare earth includes Mg-Al-RE systems, Mg-Zn systems, Mg-RE systems etc..
The present invention combines specific phasor according to the hardened component service condition of layer structure composite magnesium alloy, with reference to metals handbook
Calculating simulation and DSC data determine the specific preparation at brand and composite material of high-strength dilute magnesium alloy and wrought magnesium alloy
Technique
Include the following steps：
The first step：Obtained middle layer magnesium-rare earth will be machined to polish to obtain ideal surface roughness through turning；
Second step：Chemical cleaning is carried out to prefabricated middle layer magnesium-rare earth surface, removes greasy dirt and the oxidation on surface
Object；
Third walks：Using well formula resistance furnace, melting deformation is magnesium alloy coating metal in low-carbon steel crucible, is during which needed
Sulfur hexafluoride and carbon dioxide gas mixture protection；
4th step：By magnesium-rare earth middle layer under argon atmospher protection, it is preheating to 380-420 DEG C of heat preservation 10-20min；.
5th step：Previously processed good magnesium-rare earth middle layer, coating magnesium alloy fused mass are inserted into magnesium alloy fused mass
Temperature is stablized at 610~690 DEG C；
6th step：After core material keeps the temperature 1min~3min in coating metal, taking-up is air-cooled to water cooling after coating metal solidification
To room temperature.Interface is straight to obtaining, and the layer structure magnesium alloy that coating metal and metallic intermediate layer size and thickness are stablized is multiple
Condensation material.
The composite construction magnesium alloy plate of the present invention uses modeling using high-strength magnesium-rare earth as middle layer entirety load
Property preferably conventional magnesium alloy improve whole moulding of composite material as covering material, conventional magnesium alloy can be overcome as tying
The disadvantages such as intensity existing for structure materials'use, and the performance advantages such as the mechanics of magnesium-rare earth are made full use of, meeting structural wood
Expect to compare while high-strength light demand all substantially cost-effective using magnesium-rare earth.The composite construction magnesium alloy of the present invention
Plate can be widely applied to lightweight structure part field.Deformation is that the elongation percentage of magnesium alloy is more than or equal to 10%；The rare earth magnesium
The room temperature tensile strength of alloy is more than or equal to 220MPa, and 125 DEG C of tensile strength are 175MPa or more.The tension of vertical interface layer is strong
Degree is more than the tensile strength of wrought magnesium alloy under the same terms, and the far super deformed magnesium alloy of shear strength can reach magnesium-rare earth
Shear strength 85% or more.Preparation method is simple for offer, is applicable to large-scale industrial production.
Description of the drawings
Fig. 1 is optical microstructure's photo of layer structure composite material of magnesium alloy prepared by the embodiment of the present invention 1
Fig. 2 is the SEM microstructure pictures of layer structure composite material of magnesium alloy prepared by the embodiment of the present invention 1；
Fig. 3 is 1 layer structure composite material of magnesium alloy interface shearing performance of the embodiment of the present invention
Specific implementation mode
Technical scheme of the present invention is described further with reference to specific embodiment.
Embodiment 1
The preparation of sandwich layer structure AZ31-1RE/WNG421/AZ31-1RE composite material of magnesium alloy.
Middle layer is the component of magnesium-rare earth WNG421 and percentage is：4.1%Y, 2.5%Nd, 0.5%Zr, 1.1%
Gd, surplus are Mg and inevitable impurity, and wherein impurity element S i, Fe, Cu and Ni total amounts are less than 0.15%.Rare earth total content
It is 8.2%.
Coating metal is that the deformation of microalloying is the component and percentage of Mg-Al-Zn series deformation magnesium alloys AZ31-1RE
For：3.4%Al, 0.9%Zn, surplus is Mg and inevitable impurity Si, Cu, Ca, Fe, Ni are less than 0.2%.Content of rare earth is not
Less than 1.0%, wherein mischmetal main component be Y, ingredient lists 79.75%Y, 11.22%Ho, 6.30%Dy,
1.45%Er, remaining is other rare earth elements.
Layer structure magnesium alloy composite board preparation method, includes the following steps：
The first step：The obtained middle layer WNG421 magnesium-rare earths of machining through turning are polished to obtain ideal surface thick
Rugosity；
Second step：Chemical cleaning is carried out to prefabricated middle layer WNG421 magnesium-rare earths surface, removes the greasy dirt on surface
And oxide；
Third walks：Using well formula resistance furnace, melting deformation is AZ31-1RE magnesium alloy coating metals in low-carbon steel crucible,
Period needs sulfur hexafluoride and carbon dioxide gas mixture to protect；
4th step：By WNG421 magnesium-rare earths middle layer under argon atmospher protection, it is preheating to 400 DEG C of heat preservation 15min.
5th step：Previously processed good WNG421 magnesium-rare earth middle layers are inserted into AZ31-1RE magnesium alloy fused mass,
Coating magnesium alloy fused mass temperature is stablized at 610~690 DEG C；
6th step：After middle layer keeps the temperature 1min~3min in coating metal, taking-up is air-cooled to water after coating metal solidification
It is cooled to room temperature.To obtain the layer structure AZ31- that interface is straight, and coating metal and metallic intermediate layer size and thickness are stablized
1RE/WNG421 composite material of magnesium alloy.
Embodiment 2
Sandwich layer structure ZE61K/WNG421/ZE61K composite material of magnesium alloy preparation methods.
Middle layer is the component of magnesium-rare earth WNG421 and percentage is：4.1%Y, 2.5%Nd, 0.5%Zr, 1.1%
Gd, surplus are Mg and inevitable impurity, and wherein impurity element S i, Fe, Cu and Ni total amounts are less than 0.15%.Rare earth total content
It is 8.2%.
Coating is Mg-Zn systems magnesium alloy ZE61K (Mg-5Zn-1RE-Zr) its component of microalloying and percentage is：
5%, 5.5%Zn, 0.6%Zr, 1.1% (Y, Gd), surplus are Mg and inevitable impurity, wherein impurity element S i, Fe, Cu
It is less than 0.15% with Ni total amounts.Rare earth total content is 1.1%.
Layer structure magnesium alloy composite board preparation method, includes the following steps：
The first step：The obtained middle layer WNG421 magnesium-rare earths of machining through turning are polished to obtain ideal surface thick
Rugosity；
Second step：Chemical cleaning is carried out to prefabricated middle layer WNG421 magnesium-rare earths surface, removes the greasy dirt on surface
And oxide；
Third walks：Using well formula resistance furnace, melting deformation is ZE61K magnesium alloy coating metals in low-carbon steel crucible, during which
Sulfur hexafluoride and carbon dioxide gas mixture is needed to protect；
4th step：By WNG421 magnesium-rare earths middle layer under argon atmospher protection, it is preheating to 400 DEG C of heat preservation 15min.
5th step：Previously processed good WNG421 magnesium-rare earth middle layers, coating are inserted into ZE61K magnesium alloy fused mass
Magnesium alloy fused mass temperature is stablized at 610~690 DEG C；
6th step：After middle layer keeps the temperature 1min~3min in coating metal, taking-up is air-cooled to water after coating metal solidification
It is cooled to room temperature.To obtain the layer structure ZE61K/ that interface is straight, and coating metal and metallic intermediate layer size and thickness are stablized
WNG421/ZE61K composite material of magnesium alloy.
Claims (6)
1. a kind of preparation method of layer structure composite material of magnesium alloy, which is characterized in that including：First compound constituent element, second
Bonding interface layer between compound constituent element and the first compound constituent element and the second compound constituent element, the first compound constituent element are rare earth
Magnesium alloy materials, the second compound constituent element are that deformation is magnesium alloy materials；The bonding interface layer includes：Strip precipitate disperses
Layer, without layer and graininess precipitate dispersion layer is precipitated；Specifically preparation process is:
The first step：Obtained middle layer magnesium-rare earth will be machined to polish to obtain ideal surface roughness through turning；
Second step：Chemical cleaning is carried out to prefabricated middle layer magnesium-rare earth surface, removes the greasy dirt and oxide on surface；
Third walks：Using well formula resistance furnace, melting deformation is magnesium alloy coating metal in low-carbon steel crucible, during which needs hexafluoro
Change sulphur and carbon dioxide gas mixture protection；
4th step：By magnesium-rare earth middle layer under argon atmospher protection, it is preheating to 380-420 DEG C of heat preservation 10-20min；
5th step：Previously processed good magnesium-rare earth middle layer, coating magnesium alloy fused mass temperature are inserted into magnesium alloy fused mass
Stablize at 610~690 DEG C；
6th step：After core material keeps the temperature 1min~3min in coating metal, water cooling is to room after taking-up is air-cooled to coating metal solidification
Temperature, to obtain the layer structure magnesium alloy composite wood that interface is straight, and coating metal and metallic intermediate layer size and thickness are stablized
Material.
2. the preparation method of layer structure composite material of magnesium alloy according to claim 1, which is characterized in that the deformation
Be magnesium alloy elongation percentage be more than or equal to 10%；The room temperature tensile strength of the magnesium-rare earth be more than or equal to 220MPa, 125 DEG C
Tensile strength is 175MPa or more.
3. the preparation method of layer structure composite material of magnesium alloy according to claim 1, which is characterized in that the deformation
It is that other alloy element Als of magnesium alloy, Zn, Mn, Li are no more than weight 10%.
4. the preparation method of layer structure composite material of magnesium alloy according to claim 1, which is characterized in that the interface
The thickness of binder course is：25~μm.
5. the preparation method of layer structure composite material of magnesium alloy according to claim 1 or 2, which is characterized in that described
Deformation is that magnesium alloy includes Mg-Al systems, Mg-Zn systems, Mg-Mn systems.
6. the preparation method of layer structure composite material of magnesium alloy according to claim 1 or 2, which is characterized in that described
Magnesium-rare earth includes Mg-Al-RE systems, Mg-Zn systems, Mg-RE systems.
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| CN107328303A (en) * | 2017-08-30 | 2017-11-07 | 东北大学 | A kind of high-strength light composite armor panel and its manufacture method |
| CN108248146B (en) * | 2018-01-22 | 2019-11-08 | 北京科技大学 | A kind of enhanced bimetallic composite material of magnesium alloy in interface and its method for toughening |
| CN110343983B (en) * | 2018-04-08 | 2021-09-14 | 南京理工大学 | Preparation method of multi-grain-scale multi-layer magnesium alloy |
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| CN104368791A (en) * | 2014-10-11 | 2015-02-25 | 北京科技大学 | Magnesium/solid and liquid magnesium composite casting forming method |
| CN105624503A (en) * | 2016-01-15 | 2016-06-01 | 佛山市领卓科技有限公司 | High-strength and high-plasticity magnesium alloy and preparation method thereof |
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| CN104368791A (en) * | 2014-10-11 | 2015-02-25 | 北京科技大学 | Magnesium/solid and liquid magnesium composite casting forming method |
| CN105624503A (en) * | 2016-01-15 | 2016-06-01 | 佛山市领卓科技有限公司 | High-strength and high-plasticity magnesium alloy and preparation method thereof |
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