CN106521274A - High-strength Mg-Li-Al-Y-Ca alloy and preparation method thereof - Google Patents
High-strength Mg-Li-Al-Y-Ca alloy and preparation method thereof Download PDFInfo
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- CN106521274A CN106521274A CN201610951427.9A CN201610951427A CN106521274A CN 106521274 A CN106521274 A CN 106521274A CN 201610951427 A CN201610951427 A CN 201610951427A CN 106521274 A CN106521274 A CN 106521274A
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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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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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 belongs to the technical field of metal materials and relates to a high-strength Mg-Li-Al-Y-Ca alloy and a preparation method thereof. The alloy is prepared from components in percentage by weight as follows: 4wt%-12wt% of Li, 2wt%-6wt% of Al, 1wt%-3wt% of Y, 0.5wt%-1.5wt% of Ca and the balance of Mg and impurity elements including Si, Fe, Cu and Ni, and the total quantity of the impurity elements is smaller than 0.02wt%. The alloy is prepared with the method comprising steps as follows: (1) material baking, (2) material addition, (3) casting, (4) plastic deformation, and (5) heat treatment technology. Certain mass of Y elements and certain mass of Ca elements are added to a Mg-Li-Al alloy, a strengthening phase having the high heat stability is introduced into an alloy solidification structure; meanwhile, the solidification structure is promoted to be refined; and the high-strength Mg-Li-Al-Y-Ca alloy has the relatively low density and the excellent mechanical property through plastic deformation and the heat treatment technology.
Description
Technical field
The invention belongs to technical field of metal, is related to a kind of magnesium alloy and preparation method thereof, more particularly to it is a kind of high
Intensity magnesium-lithium-aluminium-yttrium-calcium alloy and preparation method thereof.
Background technology
Magnesium (Mg) alloy has the advantages that low density, wide material sources, specific strength and specific stiffness are high, is described as " 21 century
Green engineering material ".By adding lithium (Li) in magnesium alloy and carrying out alloying, the density of magnesium alloy can be further reduced
And improve its plasticity, thus be with a wide range of applications in fields such as the Aeronautics and Astronautics higher to lightweight requirements.At present,
The a great problem for limiting magnesium lithium alloy application is low strength, it is difficult to meet the requirement of engineer applied.Therefore, develop new height
Intensity magnesium lithium alloy has very important value.
Aluminium (Al) is the alloying element commonly used in magnesium lithium alloy.After Al and Li combine to form hardening constituent, with certain strong
Change effect.But, research before shows：The hardening constituent formed after adding aluminium element only in magnesium lithium alloy is metastable phase,
Overaging phenomenon can occur under room temperature condition, cause its intensity to be decreased obviously.Rare earth element is that magnesium lithium alloy is effectively strengthened
Element, research show that rare earth element individually adds or mix addition for the intensity of magnesium lithium alloy has certain castering action.
A certain amount of rare earth element yttrium (Y) is added in magnesium-lithium-aluminium alloy, the Al with high thermal stability can be formed2Y phases, while
The content of metastable phase is reduced, so as to put forward heavy alloyed intensity and heat endurance.It is similar to rare earth element, calcium (Ca) addition magnesium-lithium-
The Al with high thermal stability can be formed in aluminium alloy2Ca phases.Additionally, in magnesium alloy fused mass process of setting, Y and Ca can be solidifying
Gu forward position is enriched with, forming component supercooling；Meanwhile, Al2Y phases and Al2Ca phases can be present as forming core particle, promote solidified structure
Refinement.Therefore, by adding Y and Ca in magnesium-lithium-aluminium alloy and forming the hardening constituent with high thermal stability simultaneously, it is expected to
Obtain a kind of novel high-strength magnesium-lithium-aluminium-yttrium-calcium alloy.
With the change of Li contents in magnesium lithium alloy, the matrix phase composition of magnesium lithium alloy can also change.When Li contents
During less than 5.7wt%, its matrix phase is solid-solution in the close-packed hexagonal α-Mg solid solution formed in Mg for Li.With ordinary magnesium alloy phase
Than the density tool decrease to some degree of such alloy, plasticity also have certain improvement.When Li contents are higher than 10.3wt%,
Its matrix phase is solid-solution in the body-centered cubic β-Li solid solution formed in Li for Mg, and the weight loss effect of such alloy is notable, with very
Low density and good plasticity, but low strength.When Li contents fall between, formation be α-Mg solid solution and β-
The double structure that Li solid solution coexists.Compared with ordinary magnesium alloy, the density of such alloy has obvious reduction, plasticity
Combine also preferable with intensity.The characteristics of three class alloys have different, can meet different occasions respectively for magnesium lithium alloy material
Different requirements.
The content of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of high-strength magnesium-lithium-aluminium-yttrium-calcium
Alloy and preparation method thereof.By yttrium and calcium constituent that certain mass is added in magnesium-lithium-aluminium alloy, in alloy graining
The hardening constituent with high thermal stability is introduced in tissue, while promote solidified structure refinement, and by corresponding plasticity afterwards
Deformation and Technology for Heating Processing so that the alloy possesses relatively low density and excellent mechanical property.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy, which includes following component by weight percentage：4～12wt%
Li, the Al of 2～6wt%, the Y of 1～3wt%, the Ca of 0.5～1.5wt%, balance of Mg and impurity element S i, Fe, Cu and
Ni, and the total amount of impurity element is less than 0.02wt%.
A kind of preparation method of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy, its be divided into smelting technology, plastic deformation process and
Technology for Heating Processing three phases.Specifically, the preparation method is comprised the following steps：
1) baking material：Magnesium, aluminium, magnesium-yttrium intermediate alloy, magnesium-calcium intermediate alloy and lithium are weighed respectively according to formula ratio, and according to
The 5%～10% of subject alloy gross weight weighs lithium salts flux, then above-mentioned raw materials is dried 3 hours in 180～250 DEG C respectively
More than；
2) feed：By the magnesium after drying and the heating fusing of lithium salts flux, magnesium liquid is obtained；Magnesium liquid is continued to be heated to 700～
740 DEG C and keeping temperature it is constant, be added thereto to aluminium；When aluminium is completely melt that rear melt temperature gos up to 700～740 DEG C, plus
Enter magnesium-yttrium intermediate alloy；When magnesium-yttrium intermediate alloy is completely melt that rear melt temperature gos up to 700～740 DEG C, magnesium-calcium is added
Intermediate alloy；When magnesium-calcium intermediate alloy is completely melt that rear melt temperature drops to 670～680 DEG C, will using stainless steel bell jar
It is pressed in melt using the lithium of stainless steel cloth cladding in advance, bell jar and silk screen is taken out after lithium is completely dissolved；
3) cast：When melt temperature gos up to 700～740 DEG C, 10～20 minutes are incubated, remove surface scum and cast
Alloy pig；
4) it is plastically deformed：Alloy pig is carried out into Homogenization Treatments 6～10 hours in 350～400 DEG C, then in 200～250
DEG C it is plastically deformed；
5) Technology for Heating Processing：The alloy for passing through plastic deformation is carried out into Ageing Treatment 4～60 hours in 100～250 DEG C, i.e.,
High-strength magnesium-lithium-aluminium-yttrium-calcium alloy is obtained.
In above-mentioned preparation method, step 1) described in magnesium-yttrium intermediate alloy be Mg-Y25 alloys, the wherein weight of yttrium
Amount accounts for the 25% of gross weight.
In above-mentioned preparation method, step 1) described in magnesium-calcium intermediate alloy be Mg-Ca15 alloys, wherein calcium constituent
Weight accounts for the 15% of gross weight.
In above-mentioned preparation method, step 1) described in lithium salts flux be mixing for lithium chloride (LiCl) and lithium fluoride (LiF)
Compound, preferred weight ratio are 3:1 mixture.
In above-mentioned preparation method, step 2) described in heating fusing completed using crucible electrical resistance furnace.
In above-mentioned preparation method, step 3) described in cast using steel die to complete, preferred pre-heated steel
Molding jig, is more preferably previously heated to 180～250 DEG C of steel die.
In above-mentioned preparation method, step 1), step 2) and step 3) in sulfur hexafluoride (SF6)/carbon dioxide (CO2)
Carry out under the conditions of mixed gas protected.
In above-mentioned preparation method, step 4) described in plastic deformation carried out using extruding, rolling or forging mode.
Compared with prior art, there are following advantages using the present invention of above-mentioned technical proposal：
(1) hardening constituent with high thermal stability is introduced magnesium lithium and is closed by adding two kinds of elements of Y and Ca simultaneously by the present invention
In auri body, invigoration effect is played；
(2) present invention has refined magnesium lithium alloy as-cast structure, has played fine grain by adding two kinds of elements of Y and Ca simultaneously
The effect of reinforcing, further increases the mechanical property of magnesium lithium alloy；
(3) present invention obtains disclosure satisfy that the high strength magnesium lithium alloy of different demands, especially meet for lightweight is high
The demand of strong material；
(4) processing technology of the invention is simple, convenient, it is easy to industrialized production.
Specific embodiment
Technical scheme is described further below in conjunction with specific embodiment.Unless otherwise stated, under
Instrument, material, reagent used in row embodiment etc. can be obtained by routine business means.
Embodiment 1：The preparation of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy.
High-strength magnesium-lithium-aluminium-yttrium-the calcium alloy of the present embodiment includes following component by weight percentage：
The Ca of the Y of the Al of the Li of the Mg of 92.49wt%, 4wt%, 2wt%, 1wt%, 0.5wt%, impurity unit of the total amount for 0.01wt%
Plain Si, Fe, Cu and Ni (wt% refers to that the weight of each component accounts for the percentage of subject alloy gross weight, the gross weight be Mg, Li,
The weight summation of Al and various intermediate alloys).
The preparation method of the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy is as follows：
Smelting technology：Whole smelting technology is in SF6/CO2Carry out under the conditions of mixed gas protected.Claim according to formula ratio respectively
Take pure Mg, pure Al, Mg-Y intermediate alloy (Mg-25wt%Y alloys, also known as Mg-Y25 alloys or the weight of Mg-25Y alloys, i.e. Y
The 25% of Mg-25wt%Y alloy gross weights is accounted for, the amount of weighing of the intermediate alloy can be according to the weight of Y in Mg-Y intermediate alloys
The gross weight of percentage and subject alloy determining, so as to make Y account in subject alloy gross weight 1%), Mg-Ca intermediate alloys
(Mg-15wt%Ca alloys account for Mg-15wt%Ca alloy gross weights also known as the weight of Mg-Ca15 alloys or Mg-15Ca alloys, i.e. Ca
The 15% of amount, the amount of weighing of the intermediate alloy can be according to the percentage by weight and subject alloy of Ca in Mg-Ca intermediate alloys
Gross weight determining, to make Ca account in subject alloy gross weight 0.5%) and Li rods, and according to subject alloy gross weight
5% weigh lithium salts flux (by weight ratio be 3:1 LiCl and LiF is mixed), then respectively above-mentioned raw materials are dried in 180 DEG C
It is dry more than 3 hours.Pure Mg and lithium salts flux after by drying is put into SF6/CO2In mixed gas protected crucible electrical resistance furnace
Heating fusing, obtains magnesium liquid.Continue heating magnesium liquid, keeping temperature is constant when magnesium liquid temp reaches 700 DEG C, in magnesium liquid directly
Add pure Al.When pure Al is completely melt that rear melt temperature gos up to 700 DEG C, Mg-Y intermediate alloys are added.Close in the middle of Mg-Y
When gold is completely melt that rear melt temperature gos up to 700 DEG C, Mg-Ca intermediate alloys are added.After Mg-Ca intermediate alloys are completely melt
When melt temperature drops to 670 DEG C, it is pressed in melt using the Li rods of stainless steel cloth cladding using stainless steel bell jar in advance,
Bell jar and silk screen are taken out after Li rods are completely melt.When melt temperature gos up to 700 DEG C, 10 minutes are incubated, remove surface and float
Slag cast alloys ingot, casting steel die used need to be previously heated to 180 DEG C.
Plastic deformation process：The alloy pig obtained by smelting technology is carried out into Homogenization Treatments 8 under the conditions of 350 DEG C little
When, the alloy for completing Homogenization Treatments is carried out into crimp under the conditions of 250 DEG C then.
Technology for Heating Processing：The alloy obtained by plastic deformation process is carried out into Ageing Treatment 16 under the conditions of 150 DEG C little
When, you can obtain the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy of the present embodiment.
After testing, the room-temperature mechanical property of the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy T5 states is as follows：Yield strength is
198MPa, tensile strength are 273MPa, and elongation percentage is 13.4%.
Embodiment 2：The preparation of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy.
High-strength magnesium-lithium-aluminium-yttrium-the calcium alloy of the present embodiment includes following component by weight percentage：
The Ca of the Y of the Al of the Li of the Mg of 84.985wt%, 8wt%, 4wt%, 2wt%, 1wt%, impurity unit of the total amount for 0.015wt%
Plain Si, Fe, Cu and Ni (wt% refers to that the weight of each component accounts for the percentage of subject alloy gross weight, the gross weight be Mg, Li,
The weight summation of Al and various intermediate alloys).
The preparation method of the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy is as follows：
Smelting technology：Whole smelting technology is in SF6/CO2Carry out under the conditions of mixed gas protected.Claim according to formula ratio respectively
Take pure Mg, pure Al, Mg-Y intermediate alloy (Mg-25wt%Y alloys, also known as Mg-Y25 alloys or the weight of Mg-25Y alloys, i.e. Y
The 25% of Mg-25wt%Y alloy gross weights is accounted for, the amount of weighing of the intermediate alloy can be according to the weight of Y in Mg-Y intermediate alloys
The gross weight of percentage and subject alloy determining, so as to make Y account in subject alloy gross weight 2%), Mg-Ca intermediate alloys
(Mg-15wt%Ca alloys account for Mg-15wt%Ca alloy gross weights also known as the weight of Mg-Ca15 alloys or Mg-15Ca alloys, i.e. Ca
The 15% of amount, the amount of weighing of the intermediate alloy can be according to the percentage by weight and subject alloy of Ca in Mg-Ca intermediate alloys
Gross weight determining, 1%) and Li rods to make Ca account in subject alloy gross weight, and according to the 5% of subject alloy gross weight
It (is 3 by weight ratio to weigh lithium salts flux:1 LiCl and LiF is mixed), above-mentioned raw materials are dried into 3 in 180 DEG C respectively then
More than hour.Pure Mg and lithium salts flux after by drying is put into SF6/CO2Heat in mixed gas protected crucible electrical resistance furnace
Fusing, obtains magnesium liquid.Continue heating magnesium liquid, keeping temperature is constant when magnesium liquid temp reaches 720 DEG C, is directly added into in magnesium liquid
Pure Al.When pure Al is completely melt that rear melt temperature gos up to 720 DEG C, Mg-Y intermediate alloys are added.When Mg-Y intermediate alloys it is complete
When melt temperature gos up to 720 DEG C after running down, Mg-Ca intermediate alloys are added.Melt after Mg-Ca intermediate alloys are completely melt
When temperature drop is to 670 DEG C, using stainless steel bell jar by Li rods press-in melt in advance using stainless steel cloth cladding, Li is treated
Rod takes out bell jar and silk screen after being completely melt.When melt temperature gos up to 720 DEG C, 15 minutes are incubated, remove surface scum simultaneously
Cast alloys ingot, casting steel die used need to be previously heated to 180 DEG C.
Plastic deformation process：The alloy pig obtained by smelting technology is carried out into Homogenization Treatments 10 under the conditions of 350 DEG C
Hour, the alloy for completing Homogenization Treatments is carried out into rolling deformation under the conditions of 250 DEG C then.
Technology for Heating Processing：The alloy obtained by plastic deformation process is carried out into Ageing Treatment 16 under the conditions of 150 DEG C little
When, you can obtain the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy of the present embodiment.
After testing, the room-temperature mechanical property of the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy T5 states is as follows：Yield strength is
177MPa, tensile strength are 254MPa, and elongation percentage is 18.9%.
Embodiment 3：The preparation of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy.
High-strength magnesium-lithium-aluminium-yttrium-the calcium alloy of the present embodiment includes following component by weight percentage：
The Ca of the Y of the Al of the Li of the Mg of 77.492wt%, 12wt%, 6wt%, 3wt%, 1.5wt%, total amount are miscellaneous for 0.008wt%'s
Prime element Si, Fe, Cu and Ni (wt% refers to that the weight of each component accounts for the percentage of subject alloy gross weight, the gross weight be Mg,
The weight summation of Li, Al and various intermediate alloys).
The preparation method of the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy is as follows：
Smelting technology：Whole smelting technology is in SF6/CO2Carry out under the conditions of mixed gas protected.Claim according to formula ratio respectively
Take pure Mg, pure Al, Mg-Y intermediate alloy (Mg-25wt%Y alloys, also known as Mg-Y25 alloys or the weight of Mg-25Y alloys, i.e. Y
The 25% of Mg-25wt%Y alloy gross weights is accounted for, the amount of weighing of the intermediate alloy can be according to the weight of Y in Mg-Y intermediate alloys
The gross weight of percentage and subject alloy determining, so as to make Y account in subject alloy gross weight 3%), Mg-Ca intermediate alloys
(Mg-15wt%Ca alloys account for Mg-15wt%Ca alloy gross weights also known as the weight of Mg-Ca15 alloys or Mg-15Ca alloys, i.e. Ca
The 15% of amount, the amount of weighing of the intermediate alloy can be according to the percentage by weight and subject alloy of Ca in Mg-Ca intermediate alloys
Gross weight determining, to make Ca account in subject alloy gross weight 1.5%) and Li rods, and according to subject alloy gross weight
5% weigh lithium salts flux (by weight ratio be 3:1 LiCl and LiF is mixed), then respectively above-mentioned raw materials are dried in 250 DEG C
It is dry more than 3 hours.Pure Mg and lithium salts flux after by drying is put into SF6/CO2In mixed gas protected crucible electrical resistance furnace
Heating fusing, obtains magnesium liquid.Continue heating magnesium liquid, keeping temperature is constant when magnesium liquid temp reaches 740 DEG C, in magnesium liquid directly
Add pure Al.When pure Al is completely melt that rear melt temperature gos up to 740 DEG C, Mg-Y intermediate alloys are added.Close in the middle of Mg-Y
When gold is completely melt that rear melt temperature gos up to 740 DEG C, Mg-Ca intermediate alloys are added.After Mg-Ca intermediate alloys are completely melt
When melt temperature drops to 680 DEG C, it is pressed in melt using the Li rods of stainless steel cloth cladding using stainless steel bell jar in advance,
Bell jar and silk screen are taken out after Li rods are completely melt.When melt temperature gos up to 740 DEG C, 20 minutes are incubated, remove surface and float
Slag cast alloys ingot, casting steel die used need to be previously heated to 250 DEG C.
Plastic deformation process：The alloy pig obtained by smelting technology is carried out into Homogenization Treatments 6 under the conditions of 400 DEG C little
When, the alloy for completing Homogenization Treatments is carried out into forging deformation under the conditions of 200 DEG C then.
Technology for Heating Processing：The alloy obtained by plastic deformation process is carried out into Ageing Treatment 16 under the conditions of 150 DEG C little
When, you can obtain the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy of the present embodiment.
After testing, the room-temperature mechanical property of the high-strength magnesium-lithium-aluminium-yttrium-calcium alloy T5 states is as follows：Yield strength is
163MPa, tensile strength are 241MPa, and elongation percentage is 16.7%.
Claims (9)
1. a kind of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy, which includes following component by weight percentage：4～12wt%'s
The Ca of the Y of the Al of Li, 2～6wt%, 1～3wt%, 0.5～1.5wt%, balance of Mg and impurity element S i, Fe, Cu and
Ni, and the total amount of impurity element is less than 0.02wt%.
2. a kind of preparation method of high-strength magnesium-lithium-aluminium-yttrium-calcium alloy according to claim 1, which includes following step
Suddenly：
1) baking material：Magnesium, aluminium, magnesium-yttrium intermediate alloy, magnesium-calcium intermediate alloy and lithium are weighed respectively according to formula ratio, and according to target
The 5%～10% of alloy gross weight weighs lithium salts flux, then respectively by above-mentioned raw materials in 180～250 DEG C dry 3 hours with
On；
2) feed：By the magnesium after drying and the heating fusing of lithium salts flux, magnesium liquid is obtained；Magnesium liquid is continued to be heated to 700～740 DEG C
And keeping temperature is constant, aluminium is added thereto to；When aluminium is completely melt that rear melt temperature gos up to 700～740 DEG C, addition magnesium-
Yttrium intermediate alloy；When magnesium-yttrium intermediate alloy is completely melt that rear melt temperature gos up to 700～740 DEG C, add in the middle of magnesium-calcium
Alloy；When magnesium-calcium intermediate alloy is completely melt that rear melt temperature drops to 670～680 DEG C, will be advance using stainless steel bell jar
Using in the lithium press-in melt that stainless steel cloth is coated, bell jar and silk screen are taken out after lithium is completely dissolved；
3) cast：When melt temperature gos up to 700～740 DEG C, 10～20 minutes are incubated, remove surface scum cast alloys
Ingot；
4) it is plastically deformed：Alloy pig is carried out into Homogenization Treatments 6～10 hours in 350～400 DEG C, is then entered in 200～250 DEG C
Row plastic deformation；
5) Technology for Heating Processing：The alloy for passing through plastic deformation is carried out into Ageing Treatment 4～60 hours in 100～250 DEG C, you can
To high-strength magnesium-lithium-aluminium-yttrium-calcium alloy.
3. preparation method according to claim 2, it is characterised in that：
Step 1) described in magnesium-yttrium intermediate alloy be Mg-Y25 alloys, the weight of wherein yttrium accounts for the 25% of gross weight.
4. preparation method according to claim 2, it is characterised in that：
Step 1) described in magnesium-calcium intermediate alloy be Mg-Ca15 alloys, the weight of wherein calcium constituent accounts for the 15% of gross weight.
5. preparation method according to claim 2, it is characterised in that：
Step 1) described in lithium salts flux be lithium chloride and lithium fluoride mixture, wherein the lithium chloride and the lithium fluoride
Weight ratio is 3:1.
6. preparation method according to claim 2, it is characterised in that：
Step 2) described in heating fusing using crucible electrical resistance furnace completing.
7. preparation method according to claim 2, it is characterised in that：
Step 3) described in casting completed using 180～250 DEG C of steel die is previously heated to.
8. preparation method according to claim 2, it is characterised in that：
Step 1), step 2) and step 3) carry out under sulfur hexafluoride/carbon dioxide gas mixture protective condition.
9. preparation method according to claim 2, it is characterised in that：
Step 4) described in plastic deformation using extruding, rolling or forging mode carry out.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106947901A (en) * | 2017-04-28 | 2017-07-14 | 苏州轻金三维科技有限公司 | A kind of high-strength high-elasticity modulus Mg Li composites and preparation method thereof |
| CN107447153A (en) * | 2017-08-10 | 2017-12-08 | 江苏理工学院 | A kind of high intensity AZ31 CaO magnesium alloys and preparation method thereof |
| CN108660347A (en) * | 2018-07-30 | 2018-10-16 | 上海交通大学 | A kind of tough Mg-Li-Al-Y alloys of height and preparation method thereof containing rich Ce mischmetals |
| CN108998711A (en) * | 2018-07-12 | 2018-12-14 | 上海交通大学 | A kind of high tough Mg-Li wrought alloy and preparation method thereof |
| GB2566035A (en) * | 2017-08-30 | 2019-03-06 | S Bahn Medical Ltd | Metal alloy and medical device containing same |
| CN111187955A (en) * | 2020-02-17 | 2020-05-22 | 青海大学 | Rare earth yttrium-doped magnesium-lithium alloy and preparation method thereof |
| WO2021035776A1 (en) * | 2019-08-29 | 2021-03-04 | 东北大学 | Method for preparing magnesium-based composite material |
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