CN107523724A - Magnesium lithium alloy and its processing technology with high thermal conductivity alpha+beta containing two-phase - Google Patents
Magnesium lithium alloy and its processing technology with high thermal conductivity alpha+beta containing two-phase Download PDFInfo
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- CN107523724A CN107523724A CN201710814238.1A CN201710814238A CN107523724A CN 107523724 A CN107523724 A CN 107523724A CN 201710814238 A CN201710814238 A CN 201710814238A CN 107523724 A CN107523724 A CN 107523724A
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- alloy
- magnesium lithium
- lithium alloy
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- magnesium
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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
Abstract
The invention discloses a kind of magnesium lithium alloy material and its processing technology with very high thermal conductivity and the alpha+beta containing two-phase.By weight percentage, the composition of alloy is：Li：8.0 10.0wt.%, Si:5.0‑14.0wt.%,In:1.0‑3.0wt.%,Sn:0.2‑1.2wt.%,Ti:0.8‑1.2wt.%,Mo:0.2‑0.4wt.%,Cd:2.0‑4.0wt.%,Al:1.2‑1.4wt.%,Co:1.0‑5.0wt.%,Mn:3.0 5.0wt.%, surplus are magnesium.The material has the mechanical property 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 120 130W/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
By adding lithium metal into magnesium metal, the magnesium lithium alloy for possessing low-density and high specific strength is just obtained.It is this new
The frontline technology of material representative magnesium alloy development, is referred to as revolutionary material the most green, and possess damping and disappear
The high damping properties made an uproar, and radioresistance, electromagnetism interference performance.Different with tissue according to lithium content, magnesium lithium alloy can be divided into
Three classes：Amount containing lithium is less than 5.5wt.% alloy, and it is organized as the solid solution (α phases) that lithium is dissolved in hcp magnesium；Amount containing lithium is more than
10.2wt.% alloy, it is organized as uniform bcc solid solution (β phases)；Amount containing lithium between 5.5-10.2wt.% alloy, its
It is organized as alpha+beta phase.
Magnesium lithium alloy proportion is typically in the range of 1.3-1.6g/cm3, the 1.8g/cm of more general magnesium alloy3It is lower.Because magnesium is close
Hexagonal is arranged, plastic deformation ability is poor, and general magnesium alloy deformation processing difficulties, processing efficiency are low, and wrought magnesium alloy is very
Difficult further post forming, causes in the market wrought magnesium alloy market share very low, seriously constrains it（Sheet material, section bar, tubing
Deng）Large-scale application in Aero-Space and electronics industry.The addition of element lithium can be such that the structure of magnesium alloy is changed into from hcp
bcc.Due to the appearance of body-centered cubic structure, be greatly improved the plasticity of magnesium alloy, and change magnesium alloy because slide less,
The shortcomings that machine-shaping difficulty.That is, magnesium lithium alloy most significant advantage compared with ordinary magnesium alloy is plastic deformation ability
Power is fine.
Magnesium lithium alloy is structural metallic materials most light so far in alloy, due to low-density, high specific strength and
Specific stiffness, good damping capacity and anti-high energy particle penetration capacity, and recuperability, make it in Aero-Space, electronics work
Possess huge application prospect in industry, communications manufacturing and auto industry.Magnesium lithium alloy material can significantly alleviate satellite weight
Amount, payload is significantly improved, reduce launch cost.Unmatched advantage makes it in Aero-Space, weapons military project, electronics production
The military projects such as product, petrochemical industry, machinery instrument, medicine equipment, outdoor equipment and civil area all have extensive use.Can be pre-
See, demand of the magnesium lithium alloy in Aero-Space and weaponry field will constantly increase, and in succession can be in civil area（Such as vapour
Car, aircraft, notebook, mobile phone, sports equipment and articles for use etc.）Obtain large-scale application.
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 alloy rigidity is with lithium content reduction and aluminium content liter
It is high and increase.For Mg-Li-Zn alloys, the alloy is age-hardening type.Due to the difference of lithium content and Zn content, in alloy
Second Phase Precipitation and age-hardening behavior have very big difference.In the world, research develops into quaternary from ternary alloy three-partalloy at present
Above alloy system further improves the combination property of magnesium lithium alloy.And by further optimizing rare earth alloy species and content
To develop most interested alloy element and addition manner.
It is although constantly deep by means such as the related composites of alloying process, solidification mode, and preparation in the world
Enter to improve the combination property and process technology of magnesium lithium alloy so that magnesium lithium alloy production cost constantly reduces and correlated performance continues
Improve.However, existing magnesium lithium alloy heat transfer property is not ideal enough, heat transfer coefficient maintains 80W/m ﹒ K or so near normal temperature.
Such alloy is seriously constrained further to apply in Aero-Space, electronics, military industry field.Recognize that magnesium lithium alloy navigates in aviation
My god, the great market of automobile and communication product.The heat transfer property of magnesium lithium alloy is further improved, is the related production of increase magnesium lithium alloy
Industry fast railway.
The content of the invention
The invention provides a kind of magnesium lithium alloy new product with high thermal conductivity and comprising two-phase alpha+beta, that is, close
The phase structure of gold is maintained in the state of two-phase alpha+beta.By controlling the content of lithium and adding trace element simultaneously, to greatly improve
The heat conductivility of magnesium lithium alloy.And existing magnesium lithium alloy mechanical property is maintained simultaneously.It is contemplated that the magnesium lithium alloy is as structure
Materials application, except reducing construction weight, can also make full use of itself high heat transfer when lightweight and heating serious occasion
Performance, in the range of the temperature of structure maintained into design.The industrialization of the magnesium lithium alloy, great economy and society can be obtained
Can benefit.In the near future, as engineer applied is expanded, magnesium lithium alloy will obtain extensively should in more structure designs
With.
Present invention aims to overcome that the deficiencies in the prior art, there is provided a kind of with high thermal conductivity and the alpha+beta containing two-phase
Magnesium lithium alloy and preparation method thereof.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of magnesium lithium alloy with high thermal conductivity and the alpha+beta containing two-phase.By weight percentage, the composition of the alloy is：Li：
8.0-10.0wt.%, Si: 5.0-14.0wt.%, In: 1.0-3.0wt.%, Sn: 0.2-1.2wt.%, Ti: 0.8-
1.2wt.%, Mo: 0.2-0.4wt.%, Cd: 2.0-4.0wt.%, Al: 1.2-1.4wt.%, Co: 1.0-5.0wt.%,
Mn:3.0-5.0wt.%, surplus are magnesium.
The preparation method of above-mentioned magnesium lithium alloy comprises the following steps：As above the raw material matched is added to the sense of argon gas protection
Answer in electric furnace, and use silicon carbide crucible.Sensing heating forms alloy molten solution to 770 degree, and abundant using electromagnetic agitation effect
Stirring 10 minutes or so.Alloy melt is cast in waterglass or graphite jig after 770 degree of insulations stand 10 minutes
Row casting.Ingot casting is subjected to deformation process at room temperature, amount is 20% under every time rolling.Every 3 passes need to carry out
Intermediate heat-treatment is hardened to eliminate processing, and technique is：320 degree of 1 hours of insulation.Final Heat Treatment Process after rolling
For：Vacuum solid solution handles 320 degree and is incubated 12 hours；Vacuum aging handles 220 degree and is incubated 1 hour.
Compared with prior art, the present invention has the advantages that：
（1）A kind of magnesium lithium alloy material with high thermal conductivity and the alpha+beta containing two-phase is provided.The material has traditional magnesium lithium alloy
Mechanical property：Modulus of elasticity is 50-70GPa, yield strength 90-120MPa, tensile strength 140-160MPa, elongation percentage
For 6-18%.And the high thermal conductivity not possessed with traditional magnesium lithium alloy：Thermal conductivity is 120-130W/m ﹒ K, and traditional magnesium lithium closes
Gold 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 magnesium lithium alloy material with high thermal conductivity and the alpha+beta containing two-phase.By weight percentage, the chemical composition of alloy
For：Li：9.0wt.%, Si: 6.4wt.%, In: 1.2wt.%, Sn: 0.3wt.%, Ti: 0.9wt.%, Mo:
0.2wt.%, Cd: 2.4wt.%, Al: 1.3wt.%, Co: 1.2wt.%, Mn:3.1wt.%, surplus are magnesium.The system of alloy
Preparation Method：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible.Sensing heating arrives
770 degree are formed alloy molten solution, and are sufficiently stirred 10 minutes or so using electromagnetic agitation effect.By alloy melt in 770 degree of insulations
It is cast to after standing 10 minutes in waterglass or graphite jig and carries out casting.Ingot casting is carried out at deformation at room temperature
Manage, amount is 20% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, technique
For：320 degree of 1 hours of insulation.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 320 degree and is incubated 12 hours；Vacuum
220 degree of Ageing Treatment is incubated 1 hour.The mechanical property and heat transfer property of gained alloy be：Modulus of elasticity is 57GPa, and surrender is strong
Spend for 110MPa, tensile strength 142MPa, elongation percentage 12%, thermal conductivity 125W/m.K.
Embodiment 2
A kind of magnesium lithium alloy material with high thermal conductivity and the alpha+beta containing two-phase.By weight percentage, the chemical composition of alloy
For：Li：8.2wt.%, Si: 9.3wt.%, In: 1.7wt.%, Sn: 0.4wt.%, Ti: 0.8wt.%, Mo:
0.3wt.%, Cd: 2.8wt.%, Al: 1.4wt.%, Co: 1.2wt.%, Mn:4.2wt.%, surplus are magnesium.The system of alloy
Preparation Method：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible.Sensing heating arrives
770 degree are formed alloy molten solution, and are sufficiently stirred 10 minutes or so using electromagnetic agitation effect.By alloy melt in 770 degree of insulations
It is cast to after standing 10 minutes in waterglass or graphite jig and carries out casting.Ingot casting is carried out at deformation at room temperature
Manage, amount is 20% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, technique
For：320 degree of 1 hours of insulation.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 320 degree and is incubated 12 hours；Vacuum
220 degree of Ageing Treatment is incubated 1 hour.The mechanical property and heat transfer property of gained alloy be：Modulus of elasticity is 52GPa, and surrender is strong
Spend for 98MPa, tensile strength 147MPa, elongation percentage 12%, thermal conductivity 120W/m.K.
Embodiment 3
A kind of magnesium lithium alloy material with high thermal conductivity and the alpha+beta containing two-phase.By weight percentage, the chemical composition of alloy
For：Li：8.8wt.%, Si: 7.3wt.%, In: 1.6wt.%, Sn: 0.9wt.%, Ti: 1.1wt.%, Mo:
0.3wt.%, Cd: 2.9wt.%, Al: 1.3wt.%, Co: 2.8wt.%, Mn:4.2wt.%, surplus are magnesium.The system of alloy
Preparation Method：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible.Sensing heating arrives
770 degree are formed alloy molten solution, and are sufficiently stirred 10 minutes or so using electromagnetic agitation effect.By alloy melt in 770 degree of insulations
It is cast to after standing 10 minutes in waterglass or graphite jig and carries out casting.Ingot casting is carried out at deformation at room temperature
Manage, amount is 20% under every time rolling.Every 3 passes need to carry out an intermediate heat-treatment to eliminate processing hardening, technique
For：320 degree of 1 hours of insulation.Final Heat Treatment Process after rolling is：Vacuum solid solution handles 320 degree and is incubated 12 hours；Vacuum
220 degree of Ageing Treatment is incubated 1 hour.The mechanical property and heat transfer property of gained alloy be：Modulus of elasticity is 62GPa, and surrender is strong
Spend for 108MPa, tensile strength 159MPa, elongation percentage 14%, thermal conductivity 128W/m.K.
Claims (3)
1. a kind of magnesium lithium alloy material with very high thermal conductivity and the alpha+beta containing two-phase, it is characterized in that：By weight percentage,
The composition of alloy is：Li：8.0-10.0wt.%, Si: 5.0-14.0wt.%, In: 1.0-3.0wt.%, Sn: 0.2-
1.2wt.%, Ti: 0.8-1.2wt.%, Mo: 0.2-0.4wt.%, Cd: 2.0-4.0wt.%, Al: 1.2-1.4wt.%,
Co: 1.0-5.0wt.%, Mn:3.0-5.0wt.%, surplus are magnesium.
2. the preparation method of magnesium lithium alloy according to claim 1, it is characterised in that comprise the following steps：By what is as above matched
Raw material is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible, and sensing heating forms alloy molten solution to 770 degree,
And be sufficiently stirred 10 minutes or so using electromagnetic agitation effect, alloy melt is cast to after 770 degree of insulations stand 10 minutes
Casting is carried out in waterglass or graphite jig.
3. the processing method of magnesium lithium alloy according to claim 1, it is characterised in that comprise the following steps：By ingot casting in room temperature
Lower carry out deformation process, amount is 20% under every time rolling, every 3 passes need to carry out an intermediate heat-treatment eliminating plus
Work is hardened, and technique is：320 degree of 1 hours of insulation, Final Heat Treatment Process is after rolling：Vacuum solid solution handles 320 degree of insulations 12
Hour；Vacuum aging handles 220 degree and is incubated 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710814238.1A CN107523724A (en) | 2017-09-11 | 2017-09-11 | Magnesium lithium alloy and its processing technology with high thermal conductivity alpha+beta containing two-phase |
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| CN201710814238.1A CN107523724A (en) | 2017-09-11 | 2017-09-11 | Magnesium lithium alloy and its processing technology with high thermal conductivity alpha+beta containing two-phase |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022977A (en) * | 2018-10-20 | 2018-12-18 | 广州宇智科技有限公司 | A kind of the casting magnesium alloy and processing technology fire-retardant using liquid metal |
| CN109022982A (en) * | 2018-10-20 | 2018-12-18 | 广州宇智科技有限公司 | A kind of liquid metal flame retardant type magnesium alloy with excellent high temperature mechanical property |
| CN109082572A (en) * | 2018-10-18 | 2018-12-25 | 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 damping properties |
| CN109161761A (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 mechanical behavior under high temperature |
| CN109161754A (en) * | 2018-10-31 | 2019-01-08 | 广州宇智科技有限公司 | Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment |
| 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 |
| CN109161763A (en) * | 2018-10-31 | 2019-01-08 | 广州宇智科技有限公司 | With the magnesium alloy and its technique of substitution AM material on a kind of new automobile components |
| WO2021241250A1 (en) * | 2020-05-29 | 2021-12-02 | キヤノン株式会社 | Alloy member, article, and manufacturing method of alloy member |
| CN115369339A (en) * | 2022-09-05 | 2022-11-22 | 航天科工(长沙)新材料研究院有限公司 | Heat treatment method of magnesium-lithium alloy die forging |
-
2017
- 2017-09-11 CN CN201710814238.1A patent/CN107523724A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082572A (en) * | 2018-10-18 | 2018-12-25 | 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 damping properties |
| CN109161761A (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 mechanical behavior under high temperature |
| 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 |
| CN109022977A (en) * | 2018-10-20 | 2018-12-18 | 广州宇智科技有限公司 | A kind of the casting magnesium alloy and processing technology fire-retardant using liquid metal |
| CN109022982A (en) * | 2018-10-20 | 2018-12-18 | 广州宇智科技有限公司 | A kind of liquid metal flame retardant type magnesium alloy with excellent high temperature mechanical property |
| CN109161754A (en) * | 2018-10-31 | 2019-01-08 | 广州宇智科技有限公司 | Semi-solid state extrusion cast form part magnesium alloy and technique under a kind of atmospheric environment |
| CN109161763A (en) * | 2018-10-31 | 2019-01-08 | 广州宇智科技有限公司 | With the magnesium alloy and its technique of substitution AM material on a kind of new automobile components |
| WO2021241250A1 (en) * | 2020-05-29 | 2021-12-02 | キヤノン株式会社 | Alloy member, article, and manufacturing method of alloy member |
| CN115369339A (en) * | 2022-09-05 | 2022-11-22 | 航天科工(长沙)新材料研究院有限公司 | Heat treatment method of magnesium-lithium alloy die forging |
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Application publication date: 20171229 |