CN107587012B - A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof - Google Patents
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of lightweight casting Al-Si-Li alloy material and preparation method thereof, wherein alloy material according to weight percent chemical composition are as follows: 2~7wt% of Si, Li 1~5%, 0~0.5wt% of Mg 0.1~3wt%, Mn 0~0.5wt%, Ti, 0~0.5wt% of Be, Zr 0~0.5wt% of 0~0.5wt%, Cr, surplus are Al and impurity.Preparation method includes: the chemical composition ingredient according to above-mentioned weight percent；First by aluminium ingot heating melting at aluminum melt, the raw metal in addition to Li is then added and stirs evenly；Refining agent is added into aluminium alloy melt to be refined, degassing processing and skims after refining；It sequentially adds coverture, Li raw material, Sr alterant and AlTiB grain refiner to stir evenly, stands cast molding after 5~25min；Solid solution and ageing treatment are carried out to casting, air is cooled to room temperature later.
Description
Technical field
The invention belongs to metal material and metallurgical technology fields, and in particular to a kind of lightweight casting Al-Si-Li alloy material
And preparation method thereof.
Background technique
Al-Li alloy is with density is low, elasticity modulus is high, specific strength and specific stiffness are high, fatigue behaviour is good and corrosion resistance
Can and many excellent comprehensive performances such as good welding performance, be a kind of elder generation with the fastest developing speed in aerospace material in recent years
Into light-alloy structure material, wide application prospect is shown in aerospace field.By very long development process, third
It has been applied in aircraft industry for Al-Li alloy.The Al-Li alloy researched and developed at present mainly based on deforming alloy,
It is fewer to the research and development of high-strength light casting Al-Li alloy.Casting occupies an important position in aviation aircraft.To casting aluminium lithium
The research of alloy and casting is the new trend of the interior appearance of aluminium lithium alloy research field in recent years.Therefore, research and development high-strength light casting
Al-Li alloy is of great significance to the development of aircraft industry.
Casting character is the important performance indexes of casting alloy.The casting character for improving alloy is research and development novel casting alloy
Key.Al-Si alloy has excellent casting character, and has moderate strength, is widely applied in the industrial production.
Li is added in hypoeutectic Al-Si alloy, the elasticity modulus of alloy can be improved while reducing alloy density.Studies have shown that
Every addition 1wt%Li in aluminium alloy can make alloy density reduce by 3%, and elasticity modulus improves 6%, and alloy is being dissolved
It works well with timeliness after-hardening.Thus, it is expected that Al-Si-Li alloy can still keep the excellent casting character of Al-Si alloy,
The features such as having both the low-density of Al-Li alloy, high elastic modulus, high specific strength and high specific stiffness again has in aerospace field
Wide application prospect.
However, according to Al-Si-Li phasor, and to Al-7wt%Si-xLi alloy studies have shown that in Al-7wt%Si
Li is added in alloy and results in nascent Al2Li3Si2The formation of phase.And with the increase of Li content, come into being Al2Li3Si2Phase transformation
It obtains coarseer.Fig. 1 shows Al coarse in a kind of Al-7wt%Si-2.5wt%Li alloy2Li3Si2 phase.It can affirm, this
The coarse primary phase of kind will the serious mechanical property for damaging alloy, especially plasticity.This microstructure characteristic hinders Al-
The development of Si-Li system alloy, so that Al-Si-Li alloy loses application value.Therefore, it is coarse even to be eliminated these for refinement
Primary phase is the key that research and development casting Al-Si-Li alloy.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of lightweight casting Al-Si-Li alloy material and its preparation
Method, the lightweight casting Al-Si-Li alloy material refines significantly even has been eliminated coarse nascent Al2Li3Si2Phase was both protected
The excellent casting character of Al-Si casting alloy and higher intensity are held, and with lower by 3~10% than traditional Al-Si alloy
Density has reached the target of high-strength light.The technical solution of the present invention is as follows:
First aspect, the present invention provides a kind of lightweight casting Al-Si-Li alloy material, according to the change of weight percent
Learn composition are as follows: Si 2~7wt%, Li 1~5%, Mg 0.1~3wt%, Mn 0~0.5wt%, Ti 0~0.5wt%, Be 0
~0.5wt%, Zr 0~0.5wt% of 0~0.5wt%, Cr, surplus is Al and impurity, wherein in the impurity: impurity element
Fe≤0.3wt%；Other impurity element total content≤1.0wt%.
Lightweight according to the present invention casts Al-Si-Li alloy material, it is preferable that the tensile strength of the alloy material
For 245~350MPa, elongation percentage is 3.0~8.0%, and density is 2.4~2.6g/cm3。
The second aspect, the present invention provide a kind of preparation method of lightweight casting Al-Si-Li alloy material, including following
Step:
According to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
First by aluminium ingot heating melting at aluminum melt, the raw metal in addition to Li is then added, stirs evenly, obtains aluminium conjunction
Golden melt；
Refining agent is added into aluminium alloy melt to be refined, degassing processing and skims after refining；
Coverture, Li raw material, Sr alterant and AlTiB crystal grain refinement are sequentially added into the aluminium alloy melt after skimming
Agent stirs evenly, and stands cast molding after 5~25min；
Solid solution and ageing treatment are carried out to casting, air is cooled to room temperature later.
Further, described first by aluminium ingot heating melting at aluminum melt, Li element oxide, preferably molten in vacuum in order to prevent
Furnace heats melting in the enclosure space full of inert gas.
Further, the technological parameter of the solid solution and ageing treatment are as follows: consolidated in 480~580 DEG C of 3~30h of heat preservation
Then molten processing, quenching cooling carry out ageing treatment in 120~220 DEG C of 3~30h of heat preservation.
The invention has the benefit that lightweight casting Al-Si-Li alloy material provided by the invention and preparation method thereof,
It can refine significantly, even be eliminated coarse nascent Al2Li3Si2Phase had both maintained the excellent casting character of alloy and higher
Intensity, and there is the density lower by 3~10% than traditional Al-Si alloy.And alloying component is reasonable, has reached the mesh of high-strength light
Mark.
Detailed description of the invention
Fig. 1 is Al coarse in a kind of Al-7wt%Si-2.5wt%Li alloy2Li3Si2Phase.
Fig. 2 is the as-cast structure figure of the Al-Si-Li alloy material of the embodiment of the present invention 3.
Fig. 3 is the as-cast structure figure of the Al-Si-Li alloy material of the embodiment of the present invention 4.
Specific embodiment
In the description of the present invention, it should be noted that the person that is not specified actual conditions in embodiment, according to normal conditions or
The condition that manufacturer suggests carries out.Reagents or instruments used without specified manufacturer is that can be obtained by commercially available purchase
Conventional products.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
The present invention is described in further details below with reference to specific embodiment, it is described be explanation of the invention without
It is to limit.
Embodiment 1
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof is present embodiments provided, the Al-Si-Li is closed
Golden material according to weight percent chemical composition are as follows: Si 7.0wt%, Li 1.2wt%, Mg 0.5wt%, Ti
0.12wt%, surplus is Al and impurity, wherein in the impurity: Impurity Fe≤0.3wt%；Other impurity element total contents
≤ 1.0wt%.
The present embodiment is drawn up for 100kg alloy, and the ingredient situation of each element is as shown in table 1,
Table 1
| Element | Percentage composition (wt%) | Addition element alloy | Alloy dosage (kg) |
| Al | Surplus | Aluminium ingot | 66.1 |
| Si | 7.0 | Pure Si | 7 |
| Mg | 0.50 | Pure Mg | 0.5 |
| Ti | 0.12 | Al-10Ti intermediate alloy | 2.4 |
| Li | 1.2 | Al-5Li intermediate alloy | 24 |
The preparation method of the Al-Si-Li alloy material, comprising the following steps:
(1) according to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
(2) aluminium ingot is added in smelting furnace by several times, heating is allowed to be completely melt, and keeps the temperature at 700-800 DEG C, adds by several times
Enter pure Si, Al-10Ti intermediate alloy of preprepared and magnesium ingot, and stir evenly, obtains aluminium alloy melt；
(3) RJ-2 refining agent is added into aluminium alloy melt to be refined, it is molten to refining using getter after refining
Argon gas is passed through in body to handle and skim；
(4) sequentially added into the aluminium alloy melt after skimming coverture, Al-5Li alloy raw material, Sr alterant and
AlTiB grain refiner, stirs evenly, and stands cast molding after 20min；Wherein coverture is that lithium chloride and lithium fluoride press quality
Mixture than 3: 1；
(5) solid solution and ageing treatment, specific process parameter are as follows: carry out at solid solution in 530 DEG C of heat preservation 16h are carried out to casting
Reason, quenching cooling, then ageing treatment is carried out in 200 DEG C of heat preservation 4h, air is cooled to room temperature later.
The Al-Si-Li alloy material of the present embodiment is subjected to tensile property test, as a result are as follows: tensile strength 249MPa,
Elongation percentage is 3.9%.
By the Al-Si-Li alloy material of the present embodiment compared with existing ZL101 cast aluminium alloy material, according to country
The regulation of standard GB/T1173-2013, ZL101 cast aluminium alloy gold is under T6 state, tensile strength 225MPa, and elongation percentage is
1%.The alloy strength and plasticity of the present embodiment are improved.The density of the ZL101 sample of actual measurement is 2.68g/cm3, this reality
The density for applying an alloy is 2.57g/cm3, density reduces 4.1%.
Embodiment 2
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof is present embodiments provided, the Al-Si-Li is closed
Golden material according to weight percent chemical composition are as follows: Si 6.0wt%, Li2.0wt%, Mg0.77wt%, Zr 0.12wt%,
Surplus is Al and impurity, wherein in the impurity: Impurity Fe≤0.3wt%；Other impurity element total contents≤
1.0wt%.
The present embodiment is drawn up for 100kg alloy, and the ingredient situation of each element is as shown in table 2,
Table 2
| Element | Percentage composition (wt%) | Addition element alloy | Alloy dosage (kg) |
| Al | Surplus | Aluminium ingot | 76.03 |
| Si | 6.0 | Al-30Si alloy | 20.00 |
| Mg | 0.77 | Pure Mg | 0.77 |
| Zr | 0.12 | Al-10Zr alloy | 1.20 |
| Li | 2.0 | Pure Li | 2.00 |
The preparation method of the Al-Si-Li alloy material, comprising the following steps:
(1) according to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
(2) aluminium ingot being fitted into vaccum sensitive stove, is then vacuumized, be re-filled with argon gas, heating is allowed to be completely melt, and
It is kept the temperature at 700-800 DEG C, Al-30Si alloy, Al-10Zr alloy and pure Mg raw metal is added in batches, stirs evenly, obtains
Aluminium alloy melt；
(3) coverture, pure Li raw material, Sr alterant and AlTiB grain refiner are sequentially added into aluminium alloy melt, are stirred
It mixes uniformly, stands cast molding after 20min；Wherein coverture is the mixture of lithium chloride and lithium fluoride in mass ratio 3: 1；
(4) solid solution and ageing treatment, specific process parameter are as follows: carry out at solid solution in 540 DEG C of heat preservation 10h are carried out to casting
Reason, quenching cooling, then ageing treatment is carried out in 180 DEG C of heat preservation 8h, air is cooled to room temperature later.
The Al-Si-Li alloy material of the present embodiment is subjected to tensile property test, as a result are as follows: tensile strength 255MPa,
Elongation percentage is 4.1%, density 2.53g/cm3, density reduces 5.6% compared with than ZL101.
Embodiment 3
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof is present embodiments provided, the Al-Si-Li is closed
Golden material according to weight percent chemical composition are as follows: Si 5.0wt%, Li 2.8wt%, Mg 1.24wt%, Ti
0.2wt%, Be0.05wt%, surplus is Al and impurity, wherein in the impurity: Impurity Fe≤0.3wt%；Other impurity
Element total content≤1.0wt%.
The present embodiment is drawn up for 100kg alloy, and the ingredient situation of each element is as shown in table 3,
Table 3
| Element | Percentage composition (wt%) | Addition element alloy | Alloy dosage (kg) |
| Al | Surplus | Aluminium ingot | 75.63 |
| Si | 5.0 | Al-30Si alloy | 16.67 |
| Mg | 1.24 | Pure Mg | 1.24 |
| Ti | 0.2 | Al-10Ti alloy | 2.00 |
| Li | 2.8 | Pure Li | 2.80 |
| Be | 0.05 | Al-3Be alloy | 1.67 |
The preparation method of the Al-Si-Li alloy material, comprising the following steps:
(1) according to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
(2) aluminium ingot is added in smelting furnace by several times, heating is allowed to be completely melt, and keeps the temperature at 700-800 DEG C, in batches
Al-30Si alloy, Al-10Ti alloy, Al-3Be alloy and pure Mg raw metal is added, stirs evenly, obtains aluminium alloy melt；
(3) RJ-2 refining agent is added into aluminium alloy melt to be refined, it is molten to refining using getter after refining
Argon gas is passed through in body to handle and skim；
(4) coverture, pure Li raw material, Sr alterant and AlTiB crystal grain are sequentially added into the aluminium alloy melt after skimming
Fining agent stirs evenly, and stands cast molding after 20min；Wherein coverture is the mixed of lithium chloride and lithium fluoride in mass ratio 3: 1
Close object；
(5) solid solution and ageing treatment, specific process parameter are as follows: carry out at solid solution in 520 DEG C of heat preservation 26h are carried out to casting
Reason, quenching cooling, then ageing treatment is carried out for 24 hours in 150 DEG C of heat preservations, air is cooled to room temperature later.
The Al-Si-Li alloy material of the present embodiment is subjected to tensile property test, as a result are as follows: tensile strength 265MPa,
Elongation percentage is 5.1%, density 2.50g/cm3, density reduces 6.7% compared with than ZL101.Fig. 2 gives the Al- of the present embodiment
The as-cast structure of Si-Li alloy material shows coarse Al2Li3Si2Mutually refine significantly.
Embodiment 4
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof is present embodiments provided, the Al-Si-Li is closed
Golden material according to weight percent chemical composition are as follows: Si 3.25wt%, Li3.3wt%, Mg 1.5wt%, Cr
0.15wt%, Ti 0.2wt%, Be 0.05wt%, surplus is Al and impurity, wherein in the impurity: Impurity Fe≤
0.3wt%；Other impurity element total content≤1.0wt%.
The present embodiment is drawn up for 100kg alloy, and the ingredient situation of each element is as shown in table 4,
Table 4
| Element | Percentage composition (wt%) | Addition element alloy | Alloy dosage (kg) |
| Al | Surplus | Aluminium ingot | 69.50 |
| Si | 3.25 | Al-30Si alloy | 10.83 |
| Mg | 1.50 | Pure Mg | 1.50 |
| Ti | 0.20 | Al-10Ti alloy | 2.00 |
| Li | 3.30 | Pure Li | 3.30 |
| Cr | 0.15 | Al-10Cr alloy | 1.50 |
| Be | 0.05 | Al-3Be alloy | 1.67 |
The preparation method of the Al-Si-Li alloy material, comprising the following steps:
(1) according to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
(2) aluminium ingot is added in smelting furnace by several times, heating is allowed to be completely melt, and keeps the temperature at 700-800 DEG C, in batches
Al-30Si alloy, Al-10Ti alloy, Al-10Cr alloy, Al-3Be alloy and pure Mg raw metal is added, stirs evenly, obtains
To aluminium alloy melt；
(3) RJ-2 refining agent is added into aluminium alloy melt to be refined, it is molten to refining using getter after refining
Argon gas is passed through in body to handle and skim；
(4) coverture, pure Li raw material, Sr alterant and AlTiB crystal grain are sequentially added into the aluminium alloy melt after skimming
Fining agent stirs evenly, and stands cast molding after 20min；Wherein coverture is the mixed of lithium chloride and lithium fluoride in mass ratio 3: 1
Close object；
(5) solid solution and ageing treatment, specific process parameter are as follows: carry out at solid solution in 550 DEG C of heat preservation 10h are carried out to casting
Reason, quenching cooling, then ageing treatment is carried out for 24 hours in 130 DEG C of heat preservations, air is cooled to room temperature later.
The Al-Si-Li alloy material of the present embodiment is subjected to tensile property test, as a result are as follows: tensile strength 279MPa,
Elongation percentage is 4.7%, density 2.47g/cm3, density reduces 7.8% compared with than ZL101.Fig. 3 gives the Al- of the present embodiment
The as-cast structure of Si-Li alloy material shows coarse Al2Li3Si2Mutually substantially eliminate.
Embodiment 5
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof is present embodiments provided, the Al-Si-Li is closed
Golden material according to weight percent chemical composition are as follows: Si 2.5wt%, Li 3.9wt%, Mg 2.0wt%, Mn
0.15wt%, Ti0.12wt%, Be 0.05wt%, surplus is Al and impurity, wherein in the impurity: Impurity Fe≤
0.3wt%；Other impurity element total content≤1.0wt%.
The present embodiment is drawn up for 100kg alloy, and the ingredient situation of each element is as shown in table 5,
Table 5
| Element | Percentage composition (wt%) | Addition element alloy | Alloy dosage (kg) |
| Al | Surplus | Aluminium ingot | 81.40 |
| Si | 2.5 | Al-30Si intermediate alloy | 8.33 |
| Mg | 2.0 | Pure Mg | 2.00 |
| Ti | 0.12 | Al-10Ti intermediate alloy | 1.20 |
| Li | 3.9 | Pure Li | 3.90 |
| Mn | 0.15 | Al-10Mn intermediate alloy | 1.50 |
| Be | 0.05 | Al-3Be intermediate alloy | 1.67 |
The preparation method of the Al-Si-Li alloy material, comprising the following steps:
(1) according to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
(2) aluminium ingot is added in smelting furnace by several times, heating is allowed to be completely melt, and keeps the temperature at 700-800 DEG C, in batches
Al-30Si intermediate alloy, Al-10Ti intermediate alloy, Al-10Mn intermediate alloy, Al-3Be intermediate alloy and pure Mg metal is added
Raw material stirs evenly, and obtains aluminium alloy melt；
(3) RJ-2 refining agent is added into aluminium alloy melt to be refined, it is molten to refining using getter after refining
Argon gas is passed through in body to handle and skim；
(4) coverture, pure Li raw material, Sr alterant and AlTiB crystal grain are sequentially added into the aluminium alloy melt after skimming
Fining agent stirs evenly, and stands cast molding after 20min；Wherein coverture is the mixed of lithium chloride and lithium fluoride in mass ratio 3: 1
Close object；
(5) solid solution and ageing treatment, specific process parameter are as follows: carry out at solid solution in 550 DEG C of heat preservation 10h are carried out to casting
Reason, quenching cooling, then ageing treatment is carried out for 24 hours in 130 DEG C of heat preservations, air is cooled to room temperature later.
The Al-Si-Li alloy material of the present embodiment is subjected to tensile property test, as a result are as follows: tensile strength 275MPa,
Elongation percentage is 4.5%, density 2.45g/cm3, density reduces 8.6% compared with than ZL101.
Embodiment 6
A kind of lightweight casting Al-Si-Li alloy material and preparation method thereof is present embodiments provided, the Al-Si-Li is closed
Golden material according to weight percent chemical composition are as follows: Si 3.5wt%, Li 4.5wt%, Mg 3.0wt%, Mn
0.15wt%, Zr0.12wt%, Be 0.12wt%, surplus is Al and impurity, wherein in the impurity: Impurity Fe≤
0.3wt%；Other impurity element total content≤1.0wt%.
The present embodiment is drawn up for 100kg alloy, and the ingredient situation of each element is as shown in table 5,
Table 6
| Element | Percentage composition (wt%) | Addition element alloy | Alloy dosage (kg) |
| Al | Surplus | Aluminium ingot | 74.1 |
| Si | 3.5 | Al-30Si intermediate alloy | 11.7 |
| Li | 4.5 | Pure Li | 4.5 |
| Mg | 3.0 | Pure Mg | 3 |
| Zr | 0.12 | Al-10Zr intermediate alloy | 1.2 |
| Mn | 0.15 | Al-10Mn intermediate alloy | 1.5 |
| Be | 0.12 | Al-3Be intermediate alloy | 4 |
The preparation method of the Al-Si-Li alloy material, comprising the following steps:
(1) according to the chemical composition ingredient of above-mentioned lightweight casting Al-Si-Li alloy material weight percent；
(2) first aluminium ingot is fitted into a closed smelting furnace space, being then filled with argon gas heating to smelting furnace space makes
Be completely melt, heating temperature is 700~800 DEG C, and Al-30Si intermediate alloy is added in batches, closes among pure Mg, Al-10Mn
Gold, Al-3Be intermediate alloy and Al-10Zr intermediate alloy raw material, stir evenly, obtain aluminium alloy melt；
(3) RJ-2 refining agent is added into aluminium alloy melt to be refined, it is molten to refining using getter after refining
Argon gas is passed through in body to handle and skim；
(4) coverture, pure Li raw material, Sr alterant and AlTiB crystal grain are sequentially added into the aluminium alloy melt after skimming
Fining agent stirs evenly, and stands cast molding after 20min；Wherein coverture is the mixed of lithium chloride and lithium fluoride in mass ratio 3: 1
Close object；
(5) solid solution and ageing treatment, specific process parameter are as follows: carry out at solid solution in 550 DEG C of heat preservation 18h are carried out to casting
Reason, quenching cooling, then ageing treatment is carried out in 170 DEG C of heat preservation 15h, air is cooled to room temperature later.
The Al-Si-Li alloy material of the present embodiment is subjected to tensile property test, as a result are as follows: tensile strength 261MPa,
Elongation percentage is 3.3%, density 2.42g/cm3, density reduces 9.7% compared with than ZL101.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (3)
1. a kind of preparation method of lightweight casting Al-Si-Li alloy material, which is characterized in that the alloy material is according to weight
Measure the chemical composition of percentage are as follows: Si 2~7wt%, Li 1~5%, Mg 0.1~3wt%, Mn 0~0.5wt%, Ti 0~
0.5wt%, Be 0~0.5wt%, Zr 0~0.5wt% of 0~0.5wt%, Cr, surplus is Al and impurity, wherein the impurity
In: Impurity Fe≤0.3wt%；Other impurity element total content≤1.0wt%, preparation method specifically includes the following steps:
According to the chemical composition of lightweight casting Al-Si-Li alloy material weight percent are as follows: Si 2~7wt%, Li 1~
5%, Mg 0.1~3wt%, Mn 0~0.5wt%, Ti 0~0.5wt%, Be 0~0.5wt%, Zr 0~0.5wt%, Cr
0~0.5wt%, surplus is Al and impurity, wherein in the impurity: Impurity Fe≤0.3wt%；Other impurity elements always contain
Amount≤1.0wt% carries out ingredient；
First by aluminium ingot heating melting at aluminum melt, the raw metal in addition to Li is then added, stirs evenly, it is molten to obtain aluminium alloy
Body；
Refining agent is added into aluminium alloy melt to be refined, degassing processing and skims after refining；
Coverture, Li raw material, Sr alterant and AlTiB grain refiner are sequentially added into the aluminium alloy melt after skimming, and are stirred
It mixes uniformly, stands cast molding after 5~25min；
Solid solution and ageing treatment are carried out to casting, air is cooled to room temperature later, in which: the technique of the solid solution and ageing treatment
Parameter are as follows: carry out solution treatment, quenching cooling, then in 120~220 DEG C of 3~30h of heat preservation in 480~580 DEG C of 3~30h of heat preservation
Carry out ageing treatment.
2. a kind of preparation method of lightweight casting Al-Si-Li alloy material according to claim 1, which is characterized in that institute
The tensile strength for stating alloy material is 245~350MPa, and elongation percentage is 3.0~8.0%, and density is 2.4~2.6g/cm3。
3. a kind of preparation method of lightweight casting Al-Si-Li alloy material according to claim 1, which is characterized in that institute
It states first by aluminium ingot heating melting at aluminum melt, in order to prevent Li element oxide, preferably in vacuum melting furnace or is being full of inertia
Melting is heated in the enclosure space of gas.
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| WO2019161137A1 (en) * | 2018-02-14 | 2019-08-22 | Arconic Inc. | Aluminum alloy products and methods for producing the same |
| CN109536723B (en) * | 2018-12-27 | 2020-11-06 | 西南铝业（集团）有限责任公司 | Method for recovering aluminum lithium alloy processing scraps |
| CN111074114B (en) * | 2020-01-03 | 2021-02-26 | 北京科技大学 | Al-Si-Mg-Li series aluminum alloy and preparation method thereof |
| CN111893335B (en) * | 2020-08-05 | 2021-09-28 | 郑州轻研合金科技有限公司 | Method for regenerating and recycling scrap of aluminum-lithium alloy waste |
| CN114807690A (en) * | 2022-04-27 | 2022-07-29 | 山东裕航特种合金装备有限公司 | Plastic aluminum lithium alloy and preparation method thereof |
| CN115992322A (en) * | 2022-12-16 | 2023-04-21 | 中国兵器科学研究院宁波分院 | Preparation method of aluminum alloy |
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