CN107502799A - One kind has the single-phase α magnesium lithium alloys of high thermal conductivity and its processing technology - Google Patents
One kind has the single-phase α magnesium lithium alloys of high thermal conductivity and its processing technology Download PDFInfo
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- CN107502799A CN107502799A CN201710713429.9A CN201710713429A CN107502799A CN 107502799 A CN107502799 A CN 107502799A CN 201710713429 A CN201710713429 A CN 201710713429A CN 107502799 A CN107502799 A CN 107502799A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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Abstract
The invention discloses one kind to have the single-phase α magnesium lithium alloys of high thermal conductivity and its processing technology.According to percentage by weight, the composition of the alloy is：Li:2.0‑5.5wt.%,Al:1.0‑2.0wt.%,Zn:1.0‑3.0wt.%,Cr:0.2‑0.4wt.%,Hf:0.1‑0.2wt.%,Ce:0.1‑0.2wt.%,Gd:0.1‑0.3wt.%,Sn:0.5 1.0wt.%, surplus are magnesium.The single-phase α magnesium lithium alloys of high thermal conductivity provided by the invention.The material has the mechanical property and damping capacity of traditional magnesium lithium alloy：Modulus of elasticity is 50 70GPa, and yield strength is 90 120MPa, and tensile strength is 140 160MPa, and elongation percentage is 6 18%.And the high thermal conductivity not possessed with traditional magnesium lithium alloy：Thermal conductivity is 110 120W/m.K, and traditional magnesium lithium alloy is 80W/m.K or so.While the mechanical property of common magnesium lithium alloy is ensured, the heat transfer coefficient of alloy can be improved 50% or so.So that alloy is big in caloric value, and needs the light-weighted occasion of device to have further concrete application, it is easy to industrialize large-scale application.
Description
Technical field
The present invention relates to technical field of alloy, specifically, is related to a kind of magnesium lithium alloy.
Background technology
Magnesium lithium alloy is the novel alloy formed by adding lithium and other a small amount of alloying elements in magnesium metal.It is theoretical
On, the density of magnesium and lithium is respectively 1.73 and 0.53g/cm3.According to the difference of alloying component, the density of magnesium lithium alloy can be set
Meter is in 0.97-1.3g/cm3In the range of change.Most light can floating on is waterborne, turns into the alloy of floating on water surface.Magnesium lithium alloy is
One break-through point of magnesium alloy development, the forward position in magnesium alloy research and industrialization, it is referred to as following the most green
Revolutionary metal material.Different with tissue according to lithium content, magnesium lithium alloy can be divided into three classes：Amount containing lithium is less than 5.5wt.% conjunction
Gold, it is organized as the solid solution (α phases) that lithium is dissolved in hcp magnesium；Amount containing lithium is more than 10.2 wt.% alloy, and it is organized as uniformly
Bcc solid solution (β phases)；For amount containing lithium between 5.5-10.2 wt.% alloy, it is organized as alpha+beta phase.
Magnesium lithium alloy material has the characteristics that low-density, high specific strength, high-ductility, is metal knot most light in the world today
Structure material.The aluminium applied to Aeronautics and Astronautics field and other aluminum alloy materials at present can be partly substituted, in Aeronautics and Astronautics, army
The field such as work, civilian is with a wide range of applications.Another feature of magnesium lithium alloy is that have good plastic working forming property,
Cold working can be carried out.In addition, magnesium lithium alloy also has the advantages that anisotropy unobvious and impact flexibility are good, and high energy can be resisted
Particle penetration.In recent years, the progress of magnesium lithium alloy research and industrialization was very notable.Magnesium lithium alloy has been enter into automobile making neck
Domain, apply to steering wheel, instrument board etc..In addition, such as communication base station, fin, camera crane, are manufactured with magnesium lithium alloy
Many weight can be mitigated.Magnesium lithium alloy is used on the parts such as notebook LCD screen framework, back housing, keyboard frame shell, can
In the case where not reducing the intensity of parts, to mitigate overall weight.Due to the good cold-forming property of magnesium lithium alloy, it is possible to achieve room
Warm punch forming, procedure is reduced, improve efficiency, ensure precision.Magnesium lithium alloy is the optimal material for manufacturing lightweight parts
Material, following application can be more and more extensive.It is contemplated that portability, lightweight, the magnesium lithium alloy product of environment-friendly type will enter people
Life, be that notebook computer, mobile phone and digital camera etc. realize the indispensable material of light-weighted electronic product.
Magnesium lithium alloy is most commonly that Mg-Li-Al systems and Mg-Li-Zn systems, and adds appropriate rare earth element.For Mg-
Li-Al alloys, addition aluminium can improve the hardness and intensity of alloy.And the hardness of alloy is with lithium content reduction and aluminium content
Raise and increase.For Mg-Li-Zn alloys, the alloy is age-hardening type.Due to the difference of lithium content and Zn content, close
Second Phase Precipitation and age-hardening behavior have very big difference in gold.In the world, research develops from ternary alloy three-partalloy at present
Alloy system more than to quaternary further improves the combination property of magnesium lithium alloy.By further optimizing rare earth alloy species
Most interested alloy element and addition manner are studied with content.
In the world by alloying process, the means such as solidification mode and preparation related compound material, which deepen continuously to improve, closes
The combination property and process technology of gold so that the production cost of alloy constantly reduces and correlated performance is constantly improve.It is but existing
Magnesium lithium alloy heat transfer property not enough, heat transfer coefficient maintains 80W/m ﹒ K or so near normal temperature.Seriously constrain such
Alloy is in Aero-Space, electronics, further applying in military project.The heat transfer property of magnesium lithium alloy is further improved, is increase magnesium
The fast railway that alloy related industry is circulated benignly.
This patent, which provides one kind, to be had high thermal conductivity and possesses single-phase α magnesium lithium alloys new product, that is, alloy
Phase structure is maintained in the state of single-phase hcp.By controlling the content of lithium and adding trace element simultaneously, to greatly improve magnesium lithium
The heat conductivility of alloy.And existing magnesium lithium alloy mechanical property is maintained simultaneously.It is contemplated that when the alloy should as structural material
During for lightweight and the serious occasion of heating, while except reducing construction weight, the high biography of itself can also be made full use of
Hot property, in the range of the temperature of device maintained into design.It is contemplated that the industrialization of such alloy can obtain greatly
Economic and social benefit.In the near future, as more engineer applied fields are expanded, magnesium lithium alloy will be in more structures
It is used widely in design.
The content of the invention
Present invention aims to overcome that the deficiencies in the prior art, there is provided one kind have the single-phase α magnesium lithium alloys of high thermal conductivity and its
Processing technology.
To achieve these goals, the present invention adopts the following technical scheme that：
One kind has the single-phase α magnesium lithium alloys of high thermal conductivity.By weight percentage, the composition of alloy is：Li: 2.0-
5.5wt.%,Al: 1.0-2.0wt.%, Zn: 1.0-3.0wt.%, Cr: 0.2-0.4wt.%, Hf: 0.1-0.2wt.%,
Ce: 0.1-0.2wt.%, Gd: 0.1-0.3wt.%, Sn:0.5-1.0wt.%, surplus are magnesium.
The above-mentioned preparation method for possessing the single-phase α magnesium lithium alloys of high thermal conductivity, comprises the following steps：The original that will as above match
Material is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible.Sensing heating forms alloy melt to 750 degree, and
It is sufficiently stirred 10 minutes or so using electromagnetic agitation effect.Alloy melt is cast to water after 750 degree of insulations stand 10 minutes
Casting is carried out in glass or graphite jig.Ingot casting is subjected to deformation process at room temperature, amount is under every time rolling
20%.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, and technique is：300 degree of 1 hours of insulation.
Final Heat Treatment Process after rolling is：Vacuum solid solution handles 600 degree and is incubated 12 hours；It is small that vacuum aging handles 425 degree of insulations 1
When.
Beneficial effects of the present invention
（1）This patent provides a kind of magnesium lithium alloy material with high heat conductance.The material has the mechanics of traditional magnesium lithium alloy
Performance：Modulus of elasticity is 50-70GPa, yield strength 90-120MPa, tensile strength 140-160MPa, elongation percentage 6-
18%.And the high thermal conductivity not possessed with traditional magnesium lithium alloy：Thermal conductivity is 110-120W/m ﹒ K, and traditional magnesium lithium alloy is
80W/m ﹒ K or so.
（2）Mg-Li wrought alloy induction melting under argon gas protection, smelting processing method is simple, and production cost compares
It is low.
（3）While common magnesium lithium alloy mechanical property is ensured, the heat transfer coefficient of alloy can be improved 50% or so.
So that alloy is that less than 100 degree caloric values are big in temperature in use, and it is further specific to need the light-weighted occasion of device to have
Using being easy to industrialize extensive equipment.
Embodiment
Embodiment 1
A kind of single-phase α magnesium lithium alloys of high thermal conductivity.By weight percentage, the chemical composition of alloy is：Li: 5.2wt.%,
Al: 1.1wt.%, Zn: 1.5wt.%, Cr: 0.2wt.%, Hf: 0.1wt.%, Ce: 0.1wt.%, Gd: 0.1wt.%,
Sn: 0.5wt.%.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of argon gas protection, and used
Silicon carbide crucible.Sensing heating forms alloy melt to 750 degree, and is sufficiently stirred 10 minutes or so using electromagnetic agitation effect.
Alloy melt is cast in waterglass or graphite jig after 750 degree of insulations stand 10 minutes and carries out casting.Will casting
Ingot carries out deformation process at room temperature, and amount is 20% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment
To eliminate processing hardening, technique is：300 degree of 1 hours of insulation.Final Heat Treatment Process after rolling is：Vacuum solid solution processing
600 degree are incubated 12 hours；Vacuum aging handles 425 degree and is incubated 1 hour.The mechanical property and heat transfer property of gained magnesium lithium alloy
For：Modulus of elasticity is 55GPa, yield strength 112MPa, tensile strength 142MPa, elongation percentage 14%, and thermal conductivity is
115W/m.K。
Embodiment 2
A kind of single-phase α magnesium lithium alloys of high thermal conductivity.By weight percentage, the chemical composition of alloy is：Li: 4.8wt.%,
Al: 1.9wt.%, Zn: 2.1wt.%, Cr: 0.3wt.%, Hf: 0.1wt.%, Ce: 0.1wt.%, Gd: 0.2wt.%,
Sn: 0.7wt.%.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of argon gas protection, and used
Silicon carbide crucible.Sensing heating forms alloy melt to 750 degree, and is sufficiently stirred 10 minutes or so using electromagnetic agitation effect.
Alloy melt is cast in waterglass or graphite jig after 750 degree of insulations stand 10 minutes and carries out casting.Will casting
Ingot carries out deformation process at room temperature, and amount is 20% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment
To eliminate processing hardening, technique is：300 degree of 1 hours of insulation.Final Heat Treatment Process after rolling is：Vacuum solid solution processing
600 degree are incubated 12 hours；Vacuum aging handles 425 degree and is incubated 1 hour.The mechanical property and heat transfer property of gained alloy be：Bullet
Property modulus is 52GPa, yield strength 118MPa, tensile strength 146MPa, elongation percentage 15%, thermal conductivity 119W/m.K.
Embodiment 3
A kind of single-phase α magnesium lithium alloys of high thermal conductivity.By weight percentage, the chemical composition of alloy is：Li: 4.9wt.%,
Al: 1.6wt.%, Zn: 1.8wt.%, Cr: 0.3wt.%, Hf: 0.2wt.%, Ce: 0.1wt.%, Gd: 0.1wt.%,
Sn: 0.8wt.%.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of argon gas protection, and used
Silicon carbide crucible.Sensing heating forms alloy melt to 750 degree, and is sufficiently stirred 10 minutes or so using electromagnetic agitation effect.
Alloy melt is cast in waterglass or graphite jig after 750 degree of insulations stand 10 minutes and carries out casting.Will casting
Ingot carries out deformation process at room temperature, and amount is 20% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment
To eliminate processing hardening, technique is：300 degree of 1 hours of insulation.Final Heat Treatment Process after rolling is：Vacuum solid solution processing
600 degree are incubated 12 hours；Vacuum aging handles 425 degree and is incubated 1 hour.The mechanical property and heat transfer property of gained alloy be：Bullet
Property modulus is 51GPa, yield strength 113MPa, tensile strength 149MPa, elongation percentage 14%, thermal conductivity 116W/m.K.
Claims (3)
1. one kind has the single-phase α magnesium lithium alloys of high thermal conductivity, it is characterized in that：According to percentage by weight, the composition of the alloy is：
Li: 2.0-5.5wt.%,Al: 1.0-2.0wt.%, Zn: 1.0-3.0wt.%, Cr: 0.2-0.4wt.%, Hf: 0.1-
0.2wt.%, Ce: 0.1-0.2wt.%, Gd: 0.1-0.3wt.%, Sn:0.5-1.0wt.%, surplus are magnesium.
2. the preparation method of the single-phase α magnesium lithium alloys of high thermal conductivity according to claim 1, it is characterised in that including following step
Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible, sensing heating to 750
Degree forms alloy solution, and is sufficiently stirred 10 minutes or so using electromagnetic agitation effect, and alloy liquid is stood in 750 degree of insulations
It is cast to after 10 minutes in waterglass or graphite jig and carries out casting.
3. the hot-working method of the single-phase α magnesium lithium alloys of high thermal conductivity according to claim 1, it is characterised in that including as follows
Step：Ingot casting is subjected to deformation process at room temperature, amount is 20% under every time rolling, and every 3 passes are needed in carrying out once
Between heat treatment eliminate processing hardening, technique is：300 degree of 1 hours of insulation, the Final Heat Treatment Process after rolling are：Vacuum
600 degree of solution treatment is incubated 12 hours；Vacuum aging handles 425 degree and is incubated 1 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710713429.9A CN107502799A (en) | 2017-08-18 | 2017-08-18 | One kind has the single-phase α magnesium lithium alloys of high thermal conductivity and its processing technology |
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| CN201710713429.9A CN107502799A (en) | 2017-08-18 | 2017-08-18 | One kind has the single-phase α magnesium lithium alloys of high thermal conductivity and its processing technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109161762A (en) * | 2018-10-18 | 2019-01-08 | 广州宇智科技有限公司 | A kind of novel flame-retardant and magnesium alloy and its processing technology with high heat-transfer performance |
| CN109266932A (en) * | 2018-11-05 | 2019-01-25 | 广州宇智科技有限公司 | A kind of 500-600 degree resistance to oxidation high energy storage density magnesium alloy and technique |
| CN115161525A (en) * | 2022-06-10 | 2022-10-11 | 北京理工大学 | High-strength high-elasticity modulus rare earth single-phase magnesium-lithium alloy and preparation method thereof |
-
2017
- 2017-08-18 CN CN201710713429.9A patent/CN107502799A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109161762A (en) * | 2018-10-18 | 2019-01-08 | 广州宇智科技有限公司 | A kind of novel flame-retardant and magnesium alloy and its processing technology with high heat-transfer performance |
| CN109266932A (en) * | 2018-11-05 | 2019-01-25 | 广州宇智科技有限公司 | A kind of 500-600 degree resistance to oxidation high energy storage density magnesium alloy and technique |
| CN115161525A (en) * | 2022-06-10 | 2022-10-11 | 北京理工大学 | High-strength high-elasticity modulus rare earth single-phase magnesium-lithium alloy and preparation method thereof |
| CN115161525B (en) * | 2022-06-10 | 2023-08-01 | 北京理工大学 | Rare earth single-phase magnesium-lithium alloy with high strength and high elastic modulus and preparation method thereof |
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Application publication date: 20171222 |