CN106834828A - A kind of standby aluminium alloy of extra large frock and preparation method thereof - Google Patents
A kind of standby aluminium alloy of extra large frock and preparation method thereof Download PDFInfo
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- CN106834828A CN106834828A CN201710105942.XA CN201710105942A CN106834828A CN 106834828 A CN106834828 A CN 106834828A CN 201710105942 A CN201710105942 A CN 201710105942A CN 106834828 A CN106834828 A CN 106834828A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22C1/026—Alloys based on aluminium
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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
- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Abstract
A kind of standby aluminium alloy of extra large frock and preparation method thereof, the extra large standby aluminium alloy of frock is made up of following component and mass percent：Mg 4.1~4.5%, Mn 0.3~0.5%, Si 0.4~0.6%, Li 0.5~0.7%, Zr 0.005~0.015%, C 0.001~0.003%, Re 0.03~0.05%, Fe≤0.15%, Cr≤0.1%, balance of Al and inevitable impurity, impurity is single≤0.05%, total amount≤0.15%.The sea standby aluminium alloy of frock of the invention has the advantages that intensity is high, plasticity is good, corrosion-resistant, welding performance is excellent, it is suitable for the standby aluminium alloy pipe of the extra large frock such as manufacture sea fishery, oil and gas development, communications and transportation, tourism, electric power, offshore construction, bar and section bar, with wide market application foreground.
Description
Technical field
The invention belongs to technical field of aluminum alloy technology, a kind of standby aluminium alloy of extra large frock and preparation method thereof is specifically related to.
Background technology
Ocean power is built, marine resources development ability is improved, Development of Marine economy is protected the marine eco-environment, safeguarded
National marine rights and interests, are the significant development strategies of China.The standby important leverage for being to build ocean power of extra large frock, extra large work kit
Include sea fishery equipment, offshore and gas development equipment, maritime transportation equipment, marine tourism equipment, ocean electrical circuitry equipment,
Offshore construction equipment etc..Traditional sea frock is mainly ferrous materials for material, though ferrous materials have the advantages that intensity is high,
Weight is big, and decay resistance is poor, causes the standby transport of extra large frock and maintenance cost all higher.Aluminium alloy have it is lightweight, into
Shape processability is good, it is corrosion-resistant the advantages of, replace existing ferrous materials to manufacture extra large frock using aluminum alloy materials standby, can improve
The standby decay resistance of extra large frock, reduces maintenance cost, while the standby weight of extra large frock can also significantly be mitigated, improves extra large frock standby
Maneuverability and carrying capacity, and obtain the effect of energy-saving and emission-reduction.
5xxx line aluminium alloys belong to the middle strength aluminium alloy of not heat-treatable strengthened type, with good decay resistance and
Welding performance, is widely used in ship, pressure vessel, refrigerating plant, television tower, plate armour, missile parts etc., such as ship and railcar
Sheet metal component, automobile and aircraft weldment, liquid tank car, refrigerator car, the fuel tank oil pipe of aircraft and electric appliance casing etc..But mesh
Preceding conventional 5xxx line aluminium alloys, such as 5005,5052,5083, though have the advantages that decay resistance and welding performance are excellent,
That due to not heat-treatable strengthened, its intensity is still relatively low, cause the 5xxx line aluminium alloys of these trades mark in use its
The problem that intensity is not enough, shock resistance is poor becomes increasingly conspicuous, it is impossible to meet the standby demand for development of modern sea frock.
The content of the invention
Above-mentioned there is problem and shortage it is an object of the invention to be directed to, there is provided a kind of intensity is high, plasticity is good, corrosion-resistant,
Excellent standby aluminium alloy of extra large frock of welding performance and preparation method thereof.
The technical proposal of the invention is realized in this way：
The standby aluminium alloy of extra large frock of the present invention, is characterized in being made up of following component and mass percent：Mg 4.1~
4.5%, Mn 0.3~0.5%, Si 0.4~0.6%, Li 0.5~0.7%, Zr 0.005~0.015%, C 0.001~0.003%,
Re 0.03~0.05%, Fe≤0.15%, Cr≤0.1%, balance of Al and inevitable impurity, impurity is single≤and 0.05%,
Total amount≤0.15%, wherein the Re into being grouped into and mass percent is：Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm
16.5%, Eu 14.9%, Gd 18.7%.
Preferably, the standby aluminium alloy of extra large frock of the present invention, is made up of following component and mass percent：Mg
4.3%, Mn 0.4%, Si 0.5%, Li 0.6%, Zr 0.01%, C 0.002%, Re 0.04%, Fe≤0.15%, Cr≤0.1%,
Balance of Al and inevitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and matter
Measuring percentage is：Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm 16.5%, Eu 14.9%, Gd 18.7%.
The preparation method of the standby aluminium alloy of extra large frock of the present invention, is characterized in comprising the following steps：
The first step：From technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys, Al5Zr1C alloys and mixed
Rare earth Re is closed as raw material；
Second step：By aluminium ingot in 720~760 DEG C of heating fusings, and add account for magnesium ingot that raw material gross weight is 4.1~4.5%,
0.4~0.6% instant silicon, 1.5~2.5% Al20Mn alloys and 2.5~3.5% Al20Li alloys, stirring are fused into aluminium conjunction
Golden liquid；
3rd step：After to aluminum alloy melt refining degasification slagging-off, the Al5Zr1C for accounting for that raw material gross weight is 0.1~0.3% is added
Alloy and 0.03~0.05% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 700~740 DEG C and 1~2 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 480~500 DEG C of solution treatment 2~3 hours, after water quenching, in 130~150 DEG C of Ageing Treatments 4
~8 hours, the standby aluminium alloy of extra large frock is obtained after furnace cooling.
The present invention compared with prior art, with advantages below：
The room temperature tensile intensity of the sea standby aluminium alloy of frock of the invention is more than 430MPa, and yield strength is more than 390MPa, elongation
More than 15%, have the advantages that intensity is high, plasticity is good, corrosion-resistant, welding performance is excellent, be suitable for manufacture sea fishery, oil gas and open
The standby aluminium alloy pipe of the sea frock such as hair, communications and transportation, tourism, electric power, offshore construction, bar and section bar, with wide
Market application foreground.
Specific embodiment
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, make further detailed to the present invention below
Describe in detail bright.
The standby aluminium alloy of extra large frock of the present invention, is made up of following component and mass percent：Mg 4.1~4.5%,
Mn 0.3~0.5%, Si 0.4~0.6%, Li 0.5~0.7%, Zr 0.005~0.015%, C 0.001~0.003%, Re
0.03~0.05%, Fe≤0.15%, Cr≤0.1%, balance of Al and inevitable impurity, impurity is single≤and 0.05%, always
Amount≤0.15%.
Preferably, the composition of the standby aluminium alloy of extra large frock and mass percent composition are：Mg 4.3%, Mn 0.4%,
Si 0.5%, Li 0.6%, Zr 0.01%, C 0.002%, Re 0.04%, Fe≤0.15%, Cr≤0.1%, balance of Al and not
Evitable impurity, impurity is single≤0.05%, total amount≤0.15%.
The Re into being grouped into and mass percent is：Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm 16.5%, Eu
14.9%, Gd 18.7%.
Wherein, Mg is the main alloy element of the sea standby aluminium alloy of frock of the invention, and Mg solubility in aluminium alloy is very big,
Mainly rise solution strengthening effect, in addition, Mg is formed in the ageing process of aluminium alloy of the present invention strengthen effect it is extremely notable
Mg2Si phases, strengthen the intensity of aluminium alloy.With the increase of Mg contents, the intensity of aluminium alloy is higher.But Mg contents are too high, aluminium
The hot cracking tendency and plasticity of alloy cast ingot can also decline, and forming performance degenerates.In order to ensure aluminium alloy have it is enough strong
Degree, plasticity and forming performance, the selection of Mg contents is 4.1~4.5%, it is preferred that Mg contents are Mg 4.3%.
Mn can form MnAl in the sea standby aluminium alloy of frock of the invention6Compound disperses particle, can prevent aluminium alloy
Recrystallization process, improves recrystallization temperature, and can significantly refine recrystal grain.Mn in aluminium alloy can also dissolved impurity Fe,
Formed（Fe、Mn）Al6, reduce the adverse effect of iron, improve the corrosion resistance and welding performance of aluminium alloy.But Mn contents are too high
Also element segregation is easily caused, therefore, the Mn of selection addition 0.3~0.5%, it is preferred that Mn contents are 0.4%.
Li is most light metallic element, and Li is added in the standby aluminium alloy of extra large frock, and the close of aluminium alloy can be reduced first
Degree, improves the specific strength and specific stiffness of aluminium alloy, reaches light-weighted effect.Secondly, Li can also separate out nanometer in ag(e)ing process
The Al of size3Li、Al2The hardening constituents such as MgLi, these hardening constituents can pinning dislocation, subgrain and crystal boundary, suppress alloy recrystallization, carry
The intensity of high-aluminium alloy, plasticity and welding performance, the micro Li of addition 0.5~0.7% can produce obvious reinforcing to aluminium alloy
Effect, it is preferred that Li additions are 0.6%.
Zr, C are that Al5Zr1C alloys are by potassium fluorozirconate and carbon dust in being added to aluminium alloy in the form of Al5Zr1C alloys
The reaction of mixture and aluminium liquid obtain, substantial amounts of ZrC particles are contained in inside.Al5Zr1C alloys are that a kind of new aluminium alloy is brilliant
Grain fining agent, inventor experimental results demonstrate the existing Al5Ti1B and Al5Ti1C alloys of Al5Zr1C alloy ratios have stronger
Grain refining capability, the Al5Zr1C alloys of addition 0.1~0.3%, in aluminium alloy containing 0.005~0.015% Zr and
0.001~0.003% C, can notable refining aluminum alloy crystal grain, improve the structural homogenity of aluminium alloy, improve the modeling of aluminium alloy
Property deformability, it is preferred that Al5Zr1C alloy addition levels be 0.2%, the C of 0.01% Zr and 0.002% is contained in aluminium alloy.
Re is to contain Pr, Nd, Pm, Sm, Eu, Gd totally six kinds of mischmetals of LREE, the physics of LREE
Chemical property is active, can be with impurity element reaction generation high-melting-point, the high stable such as the hydrogen in aluminum alloy melt, oxygen, iron, zinc, copper, chromium
The rare earth compound of property, has deep purifying to act on aluminum alloy melt, the adverse effect of impurity element can be eliminated, while rare earth is first
Element can also improve the corrosion potential of aluminium alloy and form the rare-earth oxidation film of densification in aluminum alloy surface, improve the anti-crystalline substance of aluminium alloy
Between corrosion and stress corrosion resistant ability.The experimental study of inventor shows that addition contains totally six kinds of Pr, Nd, Pm, Sm, Eu, Gd
The effect of the mixed light rare earth of LREE is all more preferable than adding a kind of or a few LREE effect, therefore,
The mischmetal of selection addition 0.03~0.05%, it is preferred that mischmetal addition is 0.04%.
Present invention also offers the preparation method of the extra large standby aluminium alloy of frock, following steps are specifically included：
The first step：From technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys, Al5Zr1C alloys and mixed
Rare earth Re is closed as raw material；
Second step：By aluminium ingot in 720~760 DEG C of heating fusings, and add account for magnesium ingot that raw material gross weight is 4.1~4.5%,
0.4~0.6% instant silicon, 1.5~2.5% Al20Mn alloys and 2.5~3.5% Al20Li alloys, stirring are fused into aluminium conjunction
Golden liquid；
3rd step：After to aluminum alloy melt refining degasification slagging-off, the Al5Zr1C for accounting for that raw material gross weight is 0.1~0.3% is added
Alloy and 0.03~0.05% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 700~740 DEG C and 1~2 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 480~500 DEG C of solution treatment 2~3 hours, after water quenching, in 130~150 DEG C of Ageing Treatments 4
~8 hours, the standby aluminium alloy of extra large frock is obtained after furnace cooling.
Preparation method of the invention, from technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys,
Al5Zr1C alloys and mischmetal Re as raw material, by optimizing the content of main alloying element Mg, add instant silicon,
Al20Mn alloys, Al20Li alloys carry out microalloying, after refined degasification, slagging-off, add Al5Zr1C alloys and mixing is dilute
Native Re, can give full play to crystal grain refinement and the deep purifying effect of Al5Zr1C alloys and mischmetal Re to aluminum alloy melt, really
The extra large standby aluminium alloy of frock of the invention that breaks even obtains high intensity, high-ductility and excellent decay resistance and welding performance.
In order to more describe present invention sea standby aluminium alloy of frock and preparation method thereof in detail, several embodiments are exemplified below
It is further described.
Embodiment 1：
The standby aluminium alloy of extra large frock of the present invention, is made up of following component and mass percent：Mg 4.1%, Mn 0.3%,
Si 0.4%, Li 0.5%, Zr 0.005%, C 0.001%, Re 0.03%, Fe≤0.15%, Cr≤0.1%, balance of Al and not
Evitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and mass percent is：
Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm 16.5%, Eu 14.9%, Gd 18.7%.Preparation method is comprised the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys, Al5Zr1C alloys and mixed
Rare earth Re is closed as raw material；
Second step：By aluminium ingot in 720 DEG C of heating fusings, and add the instant of the magnesium ingot, 0.4% for accounting for that raw material gross weight is 4.1%
Silicon, 1.5% Al20Mn alloys and 2.5% Al20Li alloys, stirring are fused into aluminum alloy melt；
3rd step：After degasification slagging-off is refined to aluminum alloy melt with carbon trichloride, it is 0.1% to add and account for raw material gross weight
Al5Zr1C alloys and 0.03% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 700 DEG C and 2 hours are stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 500 DEG C of solution treatment 2 hours, after water quenching, in 130 DEG C of Ageing Treatments 8 hours, furnace cooling
After obtain the standby aluminium alloy of extra large frock.
Embodiment 2：
The standby aluminium alloy of extra large frock of the present invention, is made up of following component and mass percent：Mg 4.3%, Mn 0.4%,
Si 0.5%, Li 0.6%, Zr 0.01%, C 0.002%, Re 0.04%, Fe≤0.15%, Cr≤0.1%, balance of Al and not
Evitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and mass percent is：
Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm 16.5%, Eu 14.9%, Gd 18.7%.Preparation method is comprised the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys, Al5Zr1C alloys and mixed
Rare earth Re is closed as raw material；
Second step：By aluminium ingot in 740 DEG C of heating fusings, and add the instant of the magnesium ingot, 0.5% for accounting for that raw material gross weight is 4.3%
Silicon, 2% Al20Mn alloys and 3% Al20Li alloys, stirring are fused into aluminum alloy melt；
3rd step：Degasification is refined with carbon trichloride to aluminum alloy melt to remove the gred, it is 0.2% to add and account for raw material gross weight
Al5Zr1C alloys and 0.04% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 720 DEG C and 1.5 hours are stood, aluminium alloy is then cast as；
5th step：It is cold with stove in 140 DEG C of Ageing Treatments 6 hours after water quenching by aluminium alloy in 490 DEG C of solution treatment 2.5 hours
But the standby aluminium alloy of extra large frock is obtained afterwards.
Embodiment 3：
The standby aluminium alloy of extra large frock of the present invention, is made up of following component and mass percent：Mg 4.5%, Mn 0.5%,
Si 0.6%, Li 0.7%, Zr 0.015%, C 0.003%, Re 0.05%, Fe≤0.15%, Cr≤0.1%, balance of Al and not
Evitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and mass percent is：
Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm 16.5%, Eu 14.9%, Gd 18.7%.Preparation method is comprised the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys, Al5Zr1C alloys and mixed
Rare earth Re is closed as raw material；
Second step：By aluminium ingot in 760 DEG C of heating fusings, and add the instant of the magnesium ingot, 0.6% for accounting for that raw material gross weight is 4.5%
Silicon, 2.5% Al20Mn alloys and 3.5% Al20Li alloys, stirring are fused into aluminum alloy melt；
3rd step：Degasification is refined with carbon trichloride to aluminum alloy melt to remove the gred, it is 0.3% to add and account for raw material gross weight
Al5Zr1C alloys and 0.05% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 740 DEG C and 1 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 480 DEG C of solution treatment 3 hours, after water quenching, in 150 DEG C of Ageing Treatments 4 hours, furnace cooling
After obtain the standby aluminium alloy of extra large frock.
By National Standard of the People's Republic of China GB/T16865-2013, by the standby aluminium alloy of extra large frock of embodiment 1-3
Standard tensile specimen is processed into, room temperature tensile is carried out on DNS200 type electronic tensile test machines, rate of extension is 2 millis m/min
Clock, tensile mechanical properties are as shown in table 1.
The tensile mechanical properties of the embodiment 1-3 of the table 1 seas standby aluminium alloy of frock
| Embodiment sequence number | Tensile strength/MPa | Yield strength/MPa | Elongation/% |
| Embodiment 1 | 431.5 | 391.7 | 18.9 |
| Embodiment 2 | 458.7 | 414.4 | 16.5 |
| Embodiment 3 | 489.1 | 445.3 | 14.5 |
From the testing result of table 1, the room temperature tensile intensity of the present invention sea standby aluminium alloy of frock is more than 430MPa, and surrender is strong
Degree is more than 390MPa, and elongation is more than 14%, has the advantages that intensity is high, plasticity is good, corrosion-resistant, welding performance is excellent, is suitable for
The standby aluminium alloy pipe of the extra large frock such as manufacture sea fishery, oil and gas development, communications and transportation, tourism, electric power, offshore construction,
Bar and section bar, with wide market application foreground.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, such as the professional person for this area is readily apparent that, such change should belong to
Within the scope of the claims in the present invention are limited.
Claims (3)
1. a kind of standby aluminium alloy of extra large frock, it is characterised in that be made up of following component and mass percent：Mg 4.1~4.5%,
Mn 0.3~0.5%, Si 0.4~0.6%, Li 0.5~0.7%, Zr 0.005~0.015%, C 0.001~0.003%, Re
0.03~0.05%, Fe≤0.15%, Cr≤0.1%, balance of Al and inevitable impurity, impurity is single≤and 0.05%, always
Amount≤0.15%, wherein the Re into being grouped into and mass percent is：Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm
16.5%, Eu 14.9%, Gd 18.7%.
2. the standby aluminium alloy of extra large frock according to claim 1, it is characterised in that by following component and mass percent group
Into：Mg 4.3%, Mn 0.4%, Si 0.5%, Li 0.6%, Zr 0.01%, C 0.002%, Re 0.04%, Fe≤0.15%, Cr
≤ 0.1%, balance of Al and inevitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein the composition of the Re
Composition and mass percent are：Pr 16.3%, Nd 23.4%, Pm 10.2%, Sm 16.5%, Eu 14.9%, Gd 18.7%.
3. a kind of method for preparing as described in above-mentioned any claim the standby aluminium alloy of extra large frock, it is characterised in that including following
Step：
The first step：From technical pure aluminium ingot, pure magnesium ingot, instant silicon, Al20Mn alloys, Al20Li alloys, Al5Zr1C alloys and mixed
Rare earth Re is closed as raw material；
Second step：By aluminium ingot in 720~760 DEG C of heating fusings, and add account for magnesium ingot that raw material gross weight is 4.1~4.5%,
0.4~0.6% instant silicon, 1.5~2.5% Al20Mn alloys and 2.5~3.5% Al20Li alloys, stirring are fused into aluminium conjunction
Golden liquid；
3rd step：After to aluminum alloy melt refining degasification slagging-off, the Al5Zr1C for accounting for that raw material gross weight is 0.1~0.3% is added
Alloy and 0.03~0.05% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 700~740 DEG C and 1~2 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 480~500 DEG C of solution treatment 2~3 hours, after water quenching, in 130~150 DEG C of Ageing Treatments 4
~8 hours, the standby aluminium alloy of extra large frock is obtained after furnace cooling.
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| CN104451272A (en) * | 2014-11-21 | 2015-03-25 | 上海交通大学 | Light-weight and high-strength cast aluminum lithium alloy and preparation method thereof |
| CN104711463A (en) * | 2015-03-17 | 2015-06-17 | 中南大学 | Al-Mg-Zn-Li alloy and preparation method for alloy plate |
| CN105200284A (en) * | 2015-09-18 | 2015-12-30 | 霍山县龙鑫金属制品有限公司 | Magnesium-aluminum alloy |
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