CN107419150A - Contain single-phase β magnesium lithium alloys and its processing technology with excellent high temperature mechanical property - Google Patents
Contain single-phase β magnesium lithium alloys and its processing technology with excellent high temperature mechanical property Download PDFInfo
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- CN107419150A CN107419150A CN201710841521.3A CN201710841521A CN107419150A CN 107419150 A CN107419150 A CN 107419150A CN 201710841521 A CN201710841521 A CN 201710841521A CN 107419150 A CN107419150 A CN 107419150A
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- Prior art keywords
- alloy
- magnesium lithium
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- lithium alloy
- magnesium
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Classifications
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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
-
- 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
-
- 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 one kind, and there is excellent high temperature mechanical property to contain single-phase β magnesium lithium alloys and its processing technology.By weight percentage, the composition of alloy is：Li:12.0‑18.0wt.%,Fe:0.1‑0.6wt.%,Cr:0.1‑0.2wt.%,Co:0.1‑0.2wt.%,Gd:0.1 0.2wt.%, Er:0.1 0.2wt.%, surplus are magnesium.The present invention, which is drastically reduced and deteriorated for magnesium lithium alloy mechanical property under current 100 degree or so, provides a kind of solution of novel materials.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 mechanical behavior under high temperature not possessed with traditional magnesium lithium alloy：Under 100 degree, yield strength is 140 150MPa, and traditional magnesium lithium alloy is under 100 degree, and yield strength is 65MPa or so.The cast Mg-Li alloy smelting processing method is simple, and production cost is than relatively low.While mechanical behavior under high temperature is ensured, also the service life of alloy is further improved, is easy to industrialize large-scale application.It is less than 100 degree that magnesium lithium alloy of the present invention, which can be used for manufacturing in temperature in use, has highly significant light weight effect.
Description
Technical field
The present invention relates to technical field of alloy, specifically, is related to a kind of magnesium lithium alloy.
Background technology
Can prepare structural metallic materials magnesium lithium alloy most light in the world today by adding lithium to magnesium, density according to
Way can reach 0.96-1.64g/cm3Between.Magnesium lithium alloy material possesses low-density, high specific stiffness, the excellent mechanical of high specific strength
Performance and damping, the high damping properties of de-noising, and radioresistance, electromagnetism interference performance, represent the technology of magnesium alloy development
Forward position, it is referred to as following revolutionary material the most green.The onesize weight of magnesium lithium alloy only has the half of aluminium alloy,
But specific strength is higher than aluminium alloy.Compared with aluminium alloy, its energy loss of weight 40%-50%, can loss of weight 20%- compared with general magnesium alloy
30%.Magnesium lithium alloy be widely used in Aero-Space, weapons military project, electronic product, petrochemical industry, machinery instrument, medicine equipment,
The military projects such as outdoor equipment and civil area.
The new material phases such as magnesium lithium alloy and steel, magnesium alloy, titanium alloy, aluminium alloy, engineering plastics, carbon fibre composite
Than advantage essentially consists in:(1) damping performance protrudes, and coefficient of internal friction is big.Magnesium lithium alloy has the in-fighting higher than ordinary magnesium alloy
Coefficient, base or leg are made with magnesium lithium alloy, vibrations can be effectively reduced, improve the stability of equipment.(2) it is electromagnetically shielded
Excellent performance.Magnesium lithium alloy has the capability of electromagnetic shielding more excellent than other magnesium alloys, is prepared with magnesium lithium alloy substituted for plastic
The shell of the equipment such as portable computer, mobile phone can not only improve the intensity and impact resistance of equipment, can also play
The electro-magnetic screen function of magnesium alloy, the speech quality of mobile phone is improved, reduce injury of the electromagnetic wave to human body.(3) it is solderable
Connection, machining and cold forming ability are good.Magnesium lithium alloy can with this alloy and other magnesium alloy melting welding, can use TIG weldering,
The technologies such as laser welding, agitating friction weldering are welded.(4) magnesium lithium alloy has good machining and cold forming ability,
Room temperature punch forming can be carried out, and yield rate is more than 90%.
The addition element of general magnesium lithium alloy mainly has a class of Al, Zn, Si and In tetra-, and wherein Al and Zn addition are the most normal
See.For gained magnesium lithium alloy in intensity of the temperature higher than more than 100 degree all than relatively low, 100 degree of yield strengths maintain a 65MPa left sides
It is right.Moreover, because adding the noble elements such as Ag in magnesium lithium alloy, manufacturing cost is very high.Mg-Li wrought alloy is by extruding, rolling
Cold working or the hot worked means such as system, forging can greatly reducing defect after carrying out mechanical alloying, and refinement is brilliant
Grain, improve alloy consistency.But high is required to equipment and moulds of industrial equipment, process is more, therefore the Mg-Li wrought alloy production cycle
Length, cost are very high.Compared with Mg-Li wrought alloy, cast Mg-Li alloy has cheap, tissue isotropism, can obtained
Special tissue, it is readily produced complex-shaped part, many advantages, such as can also producing in enormous quantities can be produced with small lot.One
As cast Mg-Li alloy and Mg-Li wrought alloy seriously make its application by larger limitation because of high-temperature behavior decline.
Mg-Li wrought alloy can be substituted by developing, and possess the casting magnesium lithium gold material of high-strength tenacity at 100 degree or so
Material and its casting forming process.The purpose for shortening the manufacturing cycle, reducing manufacturing cost can be reached.The invention provides one kind to have
Have in 100 degree or so uses, and possess the single-phase β magnesium lithium alloys that yield strength is more than 120MPa in this temperature range.The magnesium
The existing good temperature-room type plasticity of lithium alloy, there is good creep-resistant property and antioxygenic property again.Meanwhile the heat-resisting high temperature magnesium lithium
Alloy material has good casting character, is suitable for compression casting under thin-walled parts protective atmosphere.Particularly it is adapted to 100 degree of casting
The lightweight structural material for possessing lightweight feature is applied and required in left and right, has huge market prospects.
The content of the invention
Present invention aims to overcome that prior art is insufficient, there is provided one kind has the single-phase β magnesium lithium of excellent high temperature mechanical property
Alloy and its processing technology.
To achieve these goals, the present invention adopts the following technical scheme that：
There is one kind excellent high temperature mechanical property to contain single-phase β magnesium lithium alloys.By weight percentage, the composition of alloy is：Li:
12.0-18.0wt.%, Fe: 0.1-0.6wt.%, Cr: 0.1-0.2wt.%, Co: 0.1-0.2wt.%, Gd: 0.1-
0.2wt.%, Er:0.1-0.2wt.%, 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 argon gas protection
In electric induction furnace, and use silicon carbide crucible.Sensing heating forms alloy solution to 750-850 degree, and is imitated using electromagnetic agitation
It should be sufficiently stirred 10 minutes or so.Alloy liquid is cast to waterglass or stone after the insulation of 750-850 degree stands 10 minutes
Casting is carried out in black mould.Final Heat Treatment Process is：Vacuum solid solution handles 340 degree and is incubated 2 hours；Vacuum aging processing
170 degree are incubated 1 hour.
Compared with prior art, the present invention has the advantages that：
（1）Patent of the present invention is drastically reduced for magnesium lithium alloy mechanical property under current 100 degree or so and deterioration provides one kind
The solution of novel materials.By the main and secondary addition element in preferred alloy, to improve hardening constituent in alloy
Consistency in the big temperature range of high-temperature stability and phase content.Pass through subsequent further optimization smelting technology and Re Chu
Parameter is managed, the perfect matching of magnesium lithium alloy high temperature phase and hardening constituent is realized, finally obtains a kind of novel high-strength heat-resistant cast
Magnesium lithium alloy material.The magnesium lithium alloy has low liquid-solid phase solidification temperature range, and hot cracking tendency is big when can solve to cast, casting
Make empty and loose obvious, the technical barriers such as elevated temperature strength is low.
（2）The material has the mechanical property of traditional magnesium lithium alloy：Modulus of elasticity is 50-70GPa, yield strength 90-
120MPa, tensile strength 140-160MPa, elongation percentage 6-18%.And the high-temperature mechanics not possessed with traditional magnesium lithium alloy
Performance：Under 100 degree, yield strength 140-150MPa, and traditional magnesium lithium alloy is under 100 degree, yield strength is 65MPa left
It is right.
（3）The cast Mg-Li alloy smelting processing method is simple, and production cost is than relatively low.Ensureing mechanical behavior under high temperature
Meanwhile also the service life of alloy is further improved, it is easy to industrialize large-scale application.Magnesium lithium alloy of the present invention can
For manufacture temperature in use be less than 100 degree, there is highly significant light weight effect.
Embodiment
Embodiment 1
A kind of magnesium lithium alloy containing single-phase β with excellent high temperature mechanical property.By weight percentage, the chemical composition of alloy
For：Li: 14.2wt.%, Fe: 0.3wt.%, Cr: 0.1wt.%, Co: 0.2wt.%, Gd:0.1wt.%, Er:
0.1wt.%, surplus are magnesium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of argon gas protection, and
Using silicon carbide crucible.Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect to 750 degree.
Alloy liquid is cast in waterglass mould for 10 minutes in 750 degree of insulations and carries out casting.Final Heat Treatment Process is：Very
Empty 340 degree of solution treatment is incubated 2 hours；Vacuum aging handles 170 degree and is incubated 1 hour.The material has traditional magnesium lithium alloy
Mechanical property：Modulus of elasticity is 56GPa, yield strength 112MPa, tensile strength 148MPa, elongation percentage 12%.And have
The mechanical behavior under high temperature that traditional magnesium lithium alloy does not possess：Under 100 degree, yield strength 143MPa, and traditional material is at 100 degree
Under, yield strength is 65MPa or so.
Embodiment 2
A kind of magnesium lithium alloy containing single-phase β with excellent high temperature mechanical property.By weight percentage, the chemical composition of alloy
For：Li: 16.8wt.%, Fe: 0.2wt.%, Cr: 0.1wt.%, Co: 0.1wt.%, Gd:0.1wt.%, Er:
0.1wt.%, surplus are magnesium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of argon gas protection, and
Using silicon carbide crucible.Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect to 750 degree.
Alloy liquid is cast in waterglass mould for 10 minutes in 750 degree of insulations and carries out casting.Final Heat Treatment Process is：Very
Empty 340 degree of solution treatment is incubated 2 hours；Vacuum aging handles 170 degree and is incubated 1 hour.The material has traditional magnesium lithium alloy
Mechanical property：Modulus of elasticity is 66GPa, yield strength 97MPa, tensile strength 143MPa, elongation percentage 12%.And have
The mechanical behavior under high temperature that traditional magnesium lithium alloy does not possess：Under 100 degree, yield strength 142MPa, and traditional material is at 100 degree
Under, yield strength is 65MPa or so.
Embodiment 3
A kind of magnesium lithium alloy containing single-phase β with excellent high temperature mechanical property.By weight percentage, the chemical composition of alloy
For：Li: 17.2wt.%, Fe: 0.3wt.%, Cr: 0.2wt.%, Co: 0.2wt.%, Gd:0.1wt.%, Er:
0.2wt.%, surplus are magnesium.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of argon gas protection, and
Using silicon carbide crucible.Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes or so using galvanomagnetic-effect to 750 degree.
Alloy liquid is cast in waterglass mould for 10 minutes in 750 degree of insulations and carries out casting.Deng taking out casting after complete solidification
Part.Final Heat Treatment Process is：Vacuum solid solution handles 340 degree and is incubated 2 hours；Vacuum aging handles 170 degree and is incubated 1 hour.Should
Material has the mechanical property of traditional magnesium lithium alloy：Modulus of elasticity is 58GPa, yield strength 106MPa, and tensile strength is
143MPa, elongation percentage 14%.And the mechanical behavior under high temperature not possessed with traditional magnesium lithium alloy：Under 100 degree, yield strength
For 146MPa, and traditional material is under 100 degree, and yield strength is 65MPa or so.
Claims (2)
1. a kind of magnesium lithium alloy containing single-phase β with excellent high temperature mechanical property, it is characterised in that by weight percentage, close
Gold composition be：Li: 12.0-18.0wt.%, Fe: 0.1-0.6wt.%, Cr: 0.1-0.2wt.%, Co: 0.1-
0.2wt.%, Gd:0.1-0.2wt.%, Er:0.1-0.2wt.%, surplus are magnesium.
2. the preparation method of the magnesium lithium alloy according to claim 1 containing single-phase β, it is characterised in that comprise the following steps：Such as
The melting in the induction furnace that 750-850 degree argon gas is protected of the alloy of upper composition, and use silicon carbide crucible melting；Stirred using electromagnetism
Effect is mixed to be sufficiently stirred 10 minutes or so；By alloy liquid 750-850 degree insulation stand 10 minutes after be cast to waterglass or
Casting is carried out in person's graphite jig；Final Heat Treatment Process is：Vacuum solid solution handles 340 degree and is incubated 2 hours；Vacuum aging
170 degree of processing is incubated 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710841521.3A CN107419150A (en) | 2017-09-18 | 2017-09-18 | Contain single-phase β magnesium lithium alloys and its processing technology with excellent high temperature mechanical property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710841521.3A CN107419150A (en) | 2017-09-18 | 2017-09-18 | Contain single-phase β magnesium lithium alloys and its processing technology with excellent high temperature mechanical property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107419150A true CN107419150A (en) | 2017-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710841521.3A Withdrawn CN107419150A (en) | 2017-09-18 | 2017-09-18 | Contain single-phase β magnesium lithium alloys and its processing technology with excellent high temperature mechanical property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107419150A (en) |
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2017
- 2017-09-18 CN CN201710841521.3A patent/CN107419150A/en not_active Withdrawn
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Application publication date: 20171201 |