CN107937774B - Corrosion-resistant extra super duralumin alloy material and production technology - Google Patents
Corrosion-resistant extra super duralumin alloy material and production technology Download PDFInfo
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- CN107937774B CN107937774B CN201711434188.0A CN201711434188A CN107937774B CN 107937774 B CN107937774 B CN 107937774B CN 201711434188 A CN201711434188 A CN 201711434188A CN 107937774 B CN107937774 B CN 107937774B
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- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
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- C22C1/00—Making non-ferrous alloys
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Abstract
The invention discloses corrosion-resistant extra super duralumin alloy material and production technology, the material quality percentage of the corrosion-resistant extra super duralumin alloy material is formed are as follows: Cu 1.5-3%；Mg 1.8-2.5%, Zn 7.5-8.4%, Ti 0.03-0.06%, W 0.55-2.5%, Zr 0.05-0.25%, Dy 0.05-0.08%, Gd 0.05-0.15%, Er 0.3-0.45%, Ce 0.3-0.4%, Si 0-0.1%, Fe 0-0.15%, remaining is aluminium；This corrosion-resistant extra super duralumin alloy material hardness is high, and intensity is big, wear-resistant, corrosion-resistant, cracking resistance is good, can use in extreme environment, non-aging deformation, secondly long service life is rocket, the structural member of guided missile and high-speed aircraft suitable for production aircraft engine compressor parts.
Description
Technical field
The present invention relates to metal material manufacturing field more particularly to corrosion-resistant extra super duralumin alloy material and production technologies.
Background technique
Aluminium alloy is the alloy using aluminium as matrix element, has that density is low, specific strength is high, plasticity is good, electric conductivity and thermally conductive
The characteristics of property is good, excellent anti-corrosion performance, to be widely applied in fields such as space flight, aviation, automobiles.
Aluminum alloy materials include main alloying element Zn, Mg, Cu and Trace Zr and a small amount of Impurity Fe and
Si.Aluminum alloy materials Zn, Mg can form the significant MgZn of strengthening effect2, make the thermal effectiveness of the alloy far better than in aluminium-
Zinc bianry alloy can reach very high tensile strength, strength characteristics, but will lead to aluminium using heat-treated is passed through
Alloy stress corrosion resistant and the ability of anti-strip corrosion can decline.On the other hand the solid solution due to most of alloying element in Al
Spend low, the tissue of alloy is to be dispersed with the multiphase granules of different scale in solid solution matrix, wherein there is size more than micron
Coarse crystalline phase particle, high temperature precipitations size the size of micron disperse phase particle below and Precipitation 011 μm with
Under precipitated phase particle.The content of alloying element and impurity element is more than its limit solid solubility in Al, that is, is caused coarse
Crystalline phase particle, coarse crystalline phase particle are fracture toughness, fatigability to aluminium alloy in place of stress collection neutralizes crack initiation
It can be had a significant impact with stress corrosion cracking.Therefore reducing coarse crystalline phase particle is to develop high-performance aluminium alloy to need to solve
The problem of.
Summary of the invention
It is an object of the invention to: the ability corroded for above-mentioned extra super duralumin alloy material stress corrosion resistant and anti-strip
It is weak, coarse crystalline phase particle there are the phenomenon that, cause extra super duralumin alloy stress corrosion, cracking the problem of, the present invention mentions
For corrosion-resistant extra super duralumin alloy material and production technology.
The technical solution adopted by the invention is as follows:
Corrosion-resistant extra super duralumin alloy material, the material quality percentage composition of the corrosion-resistant extra super duralumin alloy material
Are as follows: Cu 1.5-3%；Mg 1.8-2.5%, Zn 7.5-8.4%, Ti 0.03-0.06%, W 0.55-2.5%, Zr 0.05-
0.25%, Dy 0.05-0.08%, Gd 0.05-0.15%, Er 0.3-0.45%, Ce 0.3-0.4%, Si 0-0.1%, Fe
0-0.15%, remaining is aluminium.
The Cu of 1.5-3% is added into the extra super duralumin alloy containing Zn and Mg in its solubility range, by solid solution side
Formula can improve its intensity, relative elongation, plasticity, corrosion resistance and repeat load drag；No matter being heated after micro Zr is added
After deformation or after cold deformation, the recrystallization temperature of aluminium alloy can be improved, makes it possible to obtain after heat treatment non-
Recrystallized structure, in order to further increase the intensity of super-strength alloy, in addition the intensity of alloy, fracture toughness is can be improved in micro Zr
And anti-stress corrosion performance；The element of Ti, W, Zr etc are added, super-strength performance and corrosion resistance can be improved, conducive to mentioning
The recrystallization temperature of high alloy prevents the progress of the recrystallization process in thermal deformation and subsequent Quench heating, improves inoxidizability
And corrosion resistance；By the way that Dy, Gd, Er, Ce rare earth element is added, atomic radius 0.174-0.204mm is greater than aluminium atom half
Diameter 0.143mm, rare earth element is more active, it is fused in molten aluminum, easily fills up the surface defect of alloy phase, to reduce new and old
Surface tension on two-phase interface so that the speed of nucleus growth increases, while forming surface also between crystal grain and aluminium alloy
Active membrane prevents the crystal grain generated from growing up, makes the structure refinement of alloy, in addition, the compound that aluminium and Dy, Gd, Er, Ce are formed exists
As external crystallization nucleus when molten metal crystallizes, make the structure refinement of alloy because of the substantial increase of nucleus number, to reduce
The stress corrosion cracking of extra super duralumin alloy；By reducing the harmful impurity such as Fe and Si, the brittlement phases such as A1FeSi are avoided the formation of；In
In plastic history, so as to avoid due to matrix and brittlement phase deformation, hole is formed on phase interface, is generated micro-
Hair check, the caused fracture toughness for significantly reducing high-strength aluminum alloy.
Preferably, corrosion-resistant extra super duralumin alloy material, the material quality percentage of the corrosion-resistant extra super duralumin alloy material
Than composition are as follows: Cu 2.1%；Mg2.0%, Zn 7.9%, Ti 0.04%, W1.2%, Zr 0.11%, Dy 0.06%, Gd
0.08%, Er 0.32%, Ce 0.31%, Si 0.05%, Fe 0.08%, remaining is aluminium.
Preferably, corrosion-resistant extra super duralumin alloy material, the material quality percentage of the corrosion-resistant extra super duralumin alloy material
Than composition are as follows: Cu 2.5%；Mg2.3%, Zn8.1%, Ti 0.05%, W 1.8%, Zr 0.21%, Dy 0.07%, Gd
0.11%, Er 0.41%, Ce 0.36%, Si 0.06%, Fe 0.11%, remaining is aluminium.
The production technology of corrosion-resistant extra super duralumin alloy material, comprising the following steps:
(1) aluminium ingot is placed in smelting furnace and carries out melting, smelting temperature is 730-750 DEG C, stirs molten metal and removes the gred；
(2) Cu, Mg, Zn element is added by said ratio, stirring makes alloy liquid be sufficiently mixed 8-10min clock, adds
Dy, Gd, Er, Ce, and the temperature of smelting furnace is dropped to 693-695 DEG C, stirring makes alloy liquid be sufficiently mixed 14-16min, by above-mentioned
Ti, W, Zr element is added in proportion, and the temperature of smelting furnace is raised to 722-724 DEG C, and stirring makes alloy liquid be sufficiently mixed 16-
20min；
(3) being filled with nitrogen into molten metal and being incorporated to adds scouring agent to be refined, and refining agent is blended in nitrogen and nitrogen
Enter molten metal together, nitrogen flow 14-16L/min, nitrogen pressure 0.44-0.46MPa stir molten metal
It mixes and removes the gred, obtain refined alloy liquid；
(4) in 585-595 DEG C of at a temperature of progress nitrogen protection molding, 203-205 DEG C is kept the temperature at after solidification, is protected
The warm time is 16-18h, is then cooled to room temperature with water cooling with the speed of 3-5 DEG C/s, last clean the surface obtains corrosion-resistant super
Hard alloy.
Preferably, the refining agent quality is the 0.2-0.23% of total metal mass in smelting furnace.
The refining agent is from commercially available.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. product of the present invention hardness is high, intensity is big, and wear-resistant, corrosion-resistant, cracking resistance is good, can make in extreme environment
With, non-aging deformation, long service life, suitable for production aircraft engine compressor parts, be secondly rocket, guided missile and
The structural member of high-speed aircraft；
2. the Cu of 1.5-3% is added into the extra super duralumin alloy containing Zn and Mg in its solubility range, pass through solid solution
Mode can improve its intensity, relative elongation, plasticity, corrosion resistance and repeat load drag；No matter micro Zr is added to heat
After deformation or after cold deformation, the recrystallization temperature of aluminium alloy can be improved, makes it possible to obtain after heat treatment non-
Recrystallized structure, in order to further increase the intensity of super-strength alloy, in addition, micro Zr can further improve the strong of alloy
Degree, fracture toughness and anti-stress corrosion performance；
3. the element of Ti, W, Zr etc is added, super-strength performance and corrosion resistance can be improved, conducive to alloy is improved again
Crystallization temperature prevents the progress of the recrystallization process in thermal deformation and subsequent Quench heating, improves inoxidizability and corrosion resistance；
4. atomic radius is 0.174~0.204mm by the way that Dy, Gd, Er, Ce rare earth element is added, it is greater than aluminium atom half
Diameter 0.143mm, and rare earth element is more active, it is fused in molten aluminum, the surface defect of alloy phase is easily filled up, to reduce new
Surface tension on old two-phase interface so that the speed of nucleus growth increases, while forming table also between crystal grain and aluminium alloy
Face active membrane prevents the crystal grain generated from growing up, makes the structure refinement of alloy, in addition, the compound that aluminium and Dy, Gd, Er, Ce are formed
In molten metal crystallization as external crystallization nucleus, make the structure refinement of alloy because of the substantial increase of nucleus number, to drop
The stress corrosion cracking of low extra super duralumin alloy；
5. avoiding to form the brittlement phases such as A1FeSi by reducing the harmful impurity such as Fe and Si；In plastic history
In, it avoids due to matrix and brittlement phase deformation, forms hole on phase interface, generate microcrack, it is caused aobvious
Write the fracture toughness for reducing high-strength aluminum alloy.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Embodiment 1
Corrosion-resistant extra super duralumin alloy material, the material quality percentage composition of the corrosion-resistant extra super duralumin alloy material
Are as follows: Cu 1.5%；Mg 1.8%, Zn 7.5%, Ti 0.03%, W 0.55%, Zr 0.05%, Dy 0.05%, Gd
0.05%, Er 0.3%, Ce 0.3%, Si 0%, Fe 0%, remaining is aluminium.
The production technology of corrosion-resistant extra super duralumin alloy material, comprising the following steps:
(1) aluminium ingot is placed in smelting furnace and carries out melting, smelting temperature is 730 DEG C, stirs molten metal and removes the gred；
(2) by said ratio be added Cu, Mg, Zn element, stirring so that alloy liquid is sufficiently mixed 8min clock, add Dy,
Gd, Er, Ce, and the temperature of smelting furnace is dropped to 693 DEG C, stirring makes alloy liquid be sufficiently mixed 14min, is added by said ratio
Ti, W, Zr element, and the temperature of smelting furnace is raised to 722 DEG C, stirring makes alloy liquid be sufficiently mixed 16min；
(3) being filled with nitrogen into molten metal and being incorporated to adds scouring agent to be refined, and refining agent is blended in nitrogen and nitrogen
Enter molten metal together, nitrogen flow 14L/min, nitrogen pressure 0.44MPa are stirred molten metal and remove
Slag obtains refined alloy liquid；
(4) in 585 DEG C of at a temperature of progress nitrogen protection molding, 203 DEG C are kept the temperature at after solidification, soaking time is
Then 16h is cooled to room temperature with water cooling with the speed of 3 DEG C/s, last clean the surface obtains corrosion-resistant superhard alloy material.
The refining agent quality is 0.2% of total metal mass in smelting furnace.
The yield strength 530MPa (25 DEG C) of corrosion-resistant extra super duralumin alloy material obtained through this embodiment, tensile strength
580MPa (25 DEG C), elongation percentage 15%.
Embodiment 2
Corrosion-resistant extra super duralumin alloy material, the material quality percentage composition of the corrosion-resistant extra super duralumin alloy material
Are as follows: Cu 3%；Mg 2.5%, Zn8.4%, Ti 0.06%, W 2.5%, Zr0.25%, Dy0.08%, Gd0.15%, Er
0.45%, Ce 0.4%, Si0.1%, Fe0.15%, remaining is aluminium.
The production technology of corrosion-resistant extra super duralumin alloy material, includes the following steps；
(1) aluminium ingot is placed in smelting furnace and carries out melting, smelting temperature is 750 DEG C, stirs molten metal and removes the gred；
(2) by said ratio be added Cu, Mg, Zn element, stirring so that alloy liquid is sufficiently mixed 10min clock, add Dy,
Gd, Er, Ce, and the temperature of smelting furnace is dropped to 695 DEG C, stirring makes alloy liquid be sufficiently mixed 16min, is added by said ratio
Ti, W, Zr element, and the temperature of smelting furnace is raised to 724 DEG C, stirring makes alloy liquid be sufficiently mixed 20min；
(3) being filled with nitrogen into molten metal and being incorporated to adds scouring agent to be refined, and refining agent is blended in nitrogen and nitrogen
Enter molten metal together, nitrogen flow 16L/min, nitrogen pressure 0.46MPa are stirred molten metal and remove
Slag obtains refined alloy liquid；
(4) in 595 DEG C of at a temperature of progress nitrogen protection molding, 205 DEG C are kept the temperature at after solidification, soaking time is
Then 18h is cooled to room temperature with water cooling with the speed of 5 DEG C/s, last clean the surface obtains corrosion-resistant superhard alloy material.
The refining agent quality is 0.23% of total metal mass in smelting furnace.
The yield strength 535MPa (25 DEG C) of corrosion-resistant extra super duralumin alloy material obtained through this embodiment, tensile strength
575MPa (25 DEG C), elongation percentage 16%.
Embodiment 3
Corrosion-resistant extra super duralumin alloy material, the material quality percentage composition of the corrosion-resistant extra super duralumin alloy material
Are as follows: Cu 2.1%；Mg2.0%, Zn 7.9%, Ti 0.04%, W1.2%, Zr 0.11%, Dy 0.06%, Gd 0.08%,
Er 0.32%, Ce 0.31%, Si 0.05%, Fe 0.08%, remaining is aluminium.
The production technology of corrosion-resistant extra super duralumin alloy material, comprising the following steps:
(1) aluminium ingot is placed in smelting furnace and carries out melting, smelting temperature is 740 DEG C, stirs molten metal and removes the gred；
(2) by said ratio be added Cu, Mg, Zn element, stirring so that alloy liquid is sufficiently mixed 9min clock, add Dy,
Gd, Er, Ce, and the temperature of smelting furnace is dropped to 693 DEG C, stirring makes alloy liquid be sufficiently mixed 15min, is added by said ratio
Ti, W, Zr element, and the temperature of smelting furnace is raised to 724 DEG C, stirring makes alloy liquid be sufficiently mixed 20min；
(3) being filled with nitrogen into molten metal and being incorporated to adds scouring agent to be refined, and refining agent is blended in nitrogen and nitrogen
Enter molten metal together, nitrogen flow 16L/min, nitrogen pressure 0.45MPa are stirred molten metal and remove
Slag obtains refined alloy liquid；
(4) in 590 DEG C of at a temperature of progress nitrogen protection molding, 203 DEG C are kept the temperature at after solidification, soaking time is
Then 17h is cooled to room temperature with water cooling with the speed of 4 DEG C/s, last clean the surface obtains corrosion-resistant superhard alloy material.
The refining agent quality is 0.2 1% of total metal mass in smelting furnace.
The yield strength 525MPa (25 DEG C) of corrosion-resistant extra super duralumin alloy material obtained through this embodiment, tensile strength
570MPa (25 DEG C), elongation percentage 12%.
Embodiment 4
Corrosion-resistant extra super duralumin alloy material, the material quality percentage composition of the corrosion-resistant extra super duralumin alloy material
Are as follows: Cu 2.5%；Mg2.3%, Zn8.1%, Ti 0.05%, W 1.8%, Zr 0.21%, Dy 0.07%, Gd 0.11%,
Er 0.41%, Ce 0.36%, Si 0.06%, Fe 0.11%, remaining is aluminium.
The production technology of corrosion-resistant extra super duralumin alloy material, comprising the following steps:
(1) aluminium ingot is placed in smelting furnace and carries out melting, smelting temperature is 750 DEG C, stirs molten metal and removes the gred；
(2) by said ratio be added Cu, Mg, Zn element, stirring so that alloy liquid is sufficiently mixed 10min clock, add Dy,
Gd, Er, Ce, and the temperature of smelting furnace is dropped to 695 DEG C, stirring makes alloy liquid be sufficiently mixed 16min, is added by said ratio
Ti, W, Zr element, and the temperature of smelting furnace is raised to 724 DEG C, stirring makes alloy liquid be sufficiently mixed 20min；
(3) being filled with nitrogen into molten metal and being incorporated to adds scouring agent to be refined, and refining agent is blended in nitrogen and nitrogen
Enter molten metal together, nitrogen flow 16L/min, nitrogen pressure 0.46MPa are stirred molten metal and remove
Slag obtains refined alloy liquid；
(4) in 595 DEG C of at a temperature of progress nitrogen protection molding, 205 DEG C are kept the temperature at after solidification, soaking time is
Then 18h is cooled to room temperature with water cooling with the speed of 5 DEG C/s, last clean the surface obtains corrosion-resistant superhard alloy material.Institute
State 0.23% that refining agent quality is total metal mass in smelting furnace.
The yield strength 522MPa (25 DEG C) of corrosion-resistant extra super duralumin alloy material obtained through this embodiment, tensile strength
582MPa (25 DEG C), elongation percentage 16%.
Claims (4)
1. corrosion-resistant extra super duralumin alloy material, which is characterized in that the material quality hundred of the corrosion-resistant extra super duralumin alloy material
Divide than composition are as follows: Cu 1.5-3%；Mg 1.8-2.5%, Zn 7.5-8.4%, Ti 0.03-0.06%, W 0.55-2.5%,
Zr 0.05-0.25%, Dy 0.05-0.08%, Gd 0.05-0.15%, Er 0.3-0.45%, Ce 0.3-0.4%, Si 0-
0.1%, Fe 0-0.15%, remaining is aluminium；
The technique of the production of the corrosion-resistant extra super duralumin alloy material, comprising the following steps:
(1) aluminium ingot is placed in smelting furnace and carries out melting, smelting temperature is 730-750 DEG C, stirs molten metal and removes the gred；
(2) by said ratio be added Cu, Mg, Zn element, stirring so that alloy liquid is sufficiently mixed 8-10min clock, add Dy,
Gd, Er, Ce, and the temperature of smelting furnace is dropped to 693-695 DEG C, stirring makes alloy liquid be sufficiently mixed 14-16min, matches by above-mentioned
It is raised to 722-724 DEG C than Ti, W, Zr element is added, and by the temperature of smelting furnace, stirring makes alloy liquid be sufficiently mixed 16-20min；
(3) being filled with nitrogen into molten metal and being incorporated to adds scouring agent to be refined, and refining agent is blended in nitrogen together with nitrogen
Into molten metal, nitrogen flow 14-16L/min, nitrogen pressure 0.44-0.46MPa are stirred simultaneously molten metal
Slagging-off, obtains refined alloy liquid；
(4) 585-595 DEG C at a temperature of carry out nitrogen protection molding, 203-205 DEG C is kept the temperature at after solidification, when heat preservation
Between be 16-18h, room temperature is then cooled to the speed of 3-5 DEG C/s with water cooling, last clean the surface obtains corrosion-resistant superhard conjunction
Golden material.
2. corrosion-resistant extra super duralumin alloy material according to claim 1, which is characterized in that the corrosion-resistant superduralumin closes
The material quality percentage of golden material forms are as follows: Cu 2.1%；Mg2.0%, Zn 7.9%, Ti 0.04%, W1.2%, Zr
0.11%, Dy 0.06%, Gd 0.08%, Er 0.32%, Ce 0.31%, Si 0.05%, Fe 0.08%, remaining is aluminium.
3. corrosion-resistant extra super duralumin alloy material according to claim 1, which is characterized in that the corrosion-resistant superduralumin closes
The material quality percentage of golden material forms are as follows: Cu 2.5%；Mg2.3%, Zn8.1%, Ti 0.05%, W 1.8%, Zr
0.21%, Dy 0.07%, Gd 0.11%, Er 0.41%, Ce 0.36%, Si 0.06%, Fe 0.11%, remaining is aluminium.
4. corrosion-resistant extra super duralumin alloy material according to claim 1, which is characterized in that the refining agent quality is smelting furnace
The 0.2-0.23% of middle total metal mass.
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| CN102021447A (en) * | 2010-12-30 | 2011-04-20 | 东北轻合金有限责任公司 | Manufacture method of extra super duralumin alloy cast ingots |
| CN102465223A (en) * | 2010-11-17 | 2012-05-23 | 北京有色金属研究总院 | Aluminum alloy material with ultrahigh strength, high toughness and wear resistance and preparation method thereof |
| CN104561708A (en) * | 2015-02-10 | 2015-04-29 | 苏州市神龙门窗有限公司 | High-oxidation-resistance aluminum alloy material and heat treatment technique thereof |
| CN106811637A (en) * | 2016-11-28 | 2017-06-09 | 佛山市尚好门窗有限责任公司 | A kind of aluminum alloy materials |
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| JPH07821B2 (en) * | 1986-03-07 | 1995-01-11 | 昭和アルミニウム株式会社 | High strength aluminum alloy |
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| CN102465223A (en) * | 2010-11-17 | 2012-05-23 | 北京有色金属研究总院 | Aluminum alloy material with ultrahigh strength, high toughness and wear resistance and preparation method thereof |
| CN102021447A (en) * | 2010-12-30 | 2011-04-20 | 东北轻合金有限责任公司 | Manufacture method of extra super duralumin alloy cast ingots |
| CN104561708A (en) * | 2015-02-10 | 2015-04-29 | 苏州市神龙门窗有限公司 | High-oxidation-resistance aluminum alloy material and heat treatment technique thereof |
| CN106811637A (en) * | 2016-11-28 | 2017-06-09 | 佛山市尚好门窗有限责任公司 | A kind of aluminum alloy materials |
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| CF01 | Termination of patent right due to non-payment of annual fee |