CN105586550B - A kind of nano-crystalline aluminium materials and its application - Google Patents
A kind of nano-crystalline aluminium materials and its application Download PDFInfo
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- CN105586550B CN105586550B CN201410562138.0A CN201410562138A CN105586550B CN 105586550 B CN105586550 B CN 105586550B CN 201410562138 A CN201410562138 A CN 201410562138A CN 105586550 B CN105586550 B CN 105586550B
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Abstract
The present invention discloses a kind of nano-crystalline aluminium materials and its application, belongs to nanocrystalline and metal material rolling technical field.The nano-crystalline aluminium materials are selection general industry aluminum materials, as follows operation preparation：1) hot rolling；2) high annealing, temperature is in the range of 310~320 DEG C, when the time is 2~5 small；3) deep cold rolling, cold-rolling deformation degree are 80 85%, obtain nano-crystalline aluminium materials.Nano-crystalline aluminium materials of the present invention are compared with existing common aluminum material and nano-crystalline aluminium materials, due to the raising of the high intensity of nanocrystalline aluminium, general corrosion resistance and resistance to spot corrosion ability, the industry-by-industry of aluminum material can be applied to, such as the aluminum frame and aluminum enclosure of electric equipment products, nanocrystalline aluminum kitchen tools and tableware can also be prepared into, compared with existing aluminum kitchen tools, nanocrystalline aluminum kitchen tools have the characteristics that weight saving (thinning), Al Ion releases reduce (raising of general corrosion resistance performance) and service life improves and reduce perforation.
Description
Technical field
The present invention relates to nanocrystalline and metal material rolling technical fields, and in particular to a kind of nano-crystalline aluminium materials and its
Using prepared nano-crystalline aluminium materials can be used for preparing aluminum nanocrystalline aluminium kitchen tools.
Background technology
Aluminium and aluminium alloy in aviation (such as aircraft, spaceship and various satellites), construction material, auto industry and are commonly used day
Using extremely wide in the fields such as product.Aluminum saucepan has the features such as light-weight, heat transfer is fast, easy to use.But due to aluminum
It is soft, fusing point is low, is easily chemically reacted with other materials, there are many drawbacks during use.Such as：1st, hold food or water should not mistake
Night is cleaned in time after.Food and aluminium vessel contacts overlong time, aluminium can be eaten partially into food, human body into after aluminium, easily
There are the diseases such as brain aging, therefore the vessel that aluminum products do not do storage food use.2nd, aluminum products usage time is long, then can be because of surface
Oxidation and absorption greasy dirt cause surface to shade, and lose original gloss, food can also corrode aluminum pot；3rd, aluminum saucepan usage time mistake
When long or wiping cleaning with sand-lime, its protective layer-pellumina is destroyed, and so as to cause aluminium device rough surface, reducing it makes
Use the time limit；When with aluminum products cooking, pot not cool down suddenly after opening, in order to avoid shorten its service life.Aluminium cookware due to
Its occupation rate of market is largely effected on there are problem above.
Nanocrystalline material is a kind of advanced material being concerned in recent years, and current research hotspot is how to become
The selection of commercial Application.Although the nano-crystalline aluminium materials tensile strength prepared at present increases, also (prolong there are plasticity is poor
Stretch rate be less than 8%), stability difference and resistance to corrosion the problems such as having much room for improvement so that in above-mentioned field, nanocrystalline aluminium
Material still can not be applied.
The content of the invention
In order to overcome the shortcomings of not locate in the art now, the object of the present invention is to provide a kind of nano-crystalline aluminium materials and its answer
With, the present invention prepares nanocrystalline aluminium raw material range of choice is wide, method is simple, suitable for industrial requires, big ruler can be prepared
Very little sample, prepared nano-crystalline aluminium materials also have preferable plasticity and anticorrosive energy while possessing excellent tensile strength
Power.
To achieve these goals, technical solution of the present invention is as follows：
A kind of nano-crystalline aluminium materials, the nano-crystalline aluminium materials are using general industry aluminium as raw material, are grasped as follows
It prepares：1) hot rolling；2) high annealing：Annealing temperature is in the range of 310~320 DEG C, when annealing time is 2~5 small；3) depth
Cold rolling：Cold-rolling deformation degree is 80~85%；Obtain nano-crystalline aluminium materials.
The nano-crystalline aluminium materials prepared through the above method, since the high intensity of nanocrystalline aluminium, general corrosion resistance and resistance to point are rotten
The raising of erosion ability (containing chlorion aqueous solution), can be applied to and prepare nanocrystalline aluminum kitchen tools, with existing aluminum kitchen
Tool is compared, nanocrystalline aluminum kitchen tools have weight saving (thinning), Al Ion releases reduce (raising of general corrosion resistance performance) and
Service life improves and reduces the characteristics of perforation (resistance to spot corrosion ability improves).
The invention has the advantages that：
1. the range of choice of raw material is wide.What the present invention had broken R.Z.Valiev cannot make nanocrystalline material with traditional handicraft
The view of material.The present invention is applicable in conventional calendering process, it overcomes some problems that other process bands are come, steady such as powder technology
It is qualitative, pressure knot consistency etc..
2. big sample sizes can be done, suitable for industrial requirement.It is given birth to using normative heat treatment of the invention, hot rolling and cold rolling
The sample size of output can meet (only related with the rolling mill used) needed for user.Sample size can do standard tensile performance reality
It tests.
3. nano-crystalline aluminium materials prepared by the present invention are compared with existing common aluminum material and nano-crystalline aluminium materials, 2-120K temperature
In the range of degree, the specific heat at constant pressure (520~711J/kg.K) of nanocrystalline aluminium is less than the specific heat at constant pressure (0-200J/g.K) of conventional aluminium,
The linear expansion coefficient of nanocrystalline aluminium is (1.15~1.82) × 10–5/K.Corrosion of the nanocrystalline aluminium in 0.25mol/L HCl solutions
Speed (impregnating 1 day) is 1/3rd of conventional aluminium.Nanocrystalline aluminium pitting resistance improves.
Description of the drawings
Fig. 1 be the embodiment of the present invention 1 prepare nano-crystalline aluminium materials in 0.25mol/L HCl solutions surface corrosion pattern
(soaking at room temperature 1 day).
Fig. 2 is common aluminum material surface corrosion pattern (soaking at room temperature 1 day) in 0.25mol/L HCl solutions.
Specific embodiment
Embodiment 1
It for 99% 20 fine aluminiums of Φ is raw material that the present embodiment, which uses purity, is operated as follows：
1. hot rolling：The fine aluminium is rolled to 4 millimeters thicks；
2. heat treatment：High annealing, high temperature is to 310 DEG C, when holding 2 is small；
3. cold rolling：4 millimeters thick pure aluminum materials are cold rolled to 0.8 millimeter, cold-rolling deformation is 80% by length computation, that is, is obtained
Obtain nanocrystalline pure aluminum material.
The present embodiment can make the nanocrystalline fine aluminium of [0.8 × 35mm × arbitrarily long], pass through X-ray and transmission electron microscope point
Analysis, crystal grain of the present invention have reached nanoscale scope, and grain size test result is shown in Table 1.
Table 1 is 1 grain size test result of embodiment
| Grain size (average) | Test method | Measuring unit |
| 32nm* | X-ray | Metal Inst., Chinese Academy of Sciences |
| 61nm | Transmission electron microscope | Metal Inst., Chinese Academy of Sciences |
Wherein：* residual stress effect in sample has been deducted.
Nano-crystalline aluminium materials manufactured in the present embodiment have good stability, the level pressure ratio of nanocrystalline aluminium in 2-120K temperature ranges
Heat is 541~603J/Kg.K.In 2-120K temperature ranges, linear expansion coefficient is (1.25~1.68) × 10–5/ K, nanocrystalline aluminium
Corrosion rate (impregnating 1 day) in 0.25mol/L HCl solutions is 1/3rd of conventional aluminium, as shown in Figs. 1-2.
Since the high intensity of nanocrystalline aluminium, general corrosion resistance and resistance to spot corrosion ability (containing chlorion aqueous solution) carry
Height is applied to and prepares nanocrystalline aluminum kitchen tools, and compared with existing aluminum kitchen tools, nanocrystalline aluminum kitchen tools subtract with weight
Gently (thinning), Al Ion releases reduce (raising of general corrosion resistance performance) and service life raising and reduce perforation (resistance to spot corrosion
Ability improves) the advantages of.
Comparative example 1
It for 99% 20 fine aluminiums of Φ is raw material that this example, which uses purity, is operated as follows：
1. hot rolling：The fine aluminium is rolled to 4 millimeters thicks；
2. heat treatment：High annealing, high temperature is to 300 DEG C, when holding 2 is small；
3. cold rolling：4 millimeters thick pure aluminum materials are cold rolled to 0.8 millimeter, cold-rolling deformation is 98% by length computation, that is, is obtained
Obtain nanocrystalline pure aluminum material.
This example can make the nanocrystalline fine aluminium of [1.0 × 45mm × arbitrarily long], by X-ray and transmission electron microscope analysis,
Crystal grain of the present invention has reached nanoscale scope, and grain size test result is shown in Table 2.
Table 2 is 2 grain size test result of embodiment
| Grain size (average) | Test method | Measuring unit |
| 50nm* | X-ray | Metal Inst., Chinese Academy of Sciences |
| 92nm | Transmission electron microscope | Metal Inst., Chinese Academy of Sciences |
Wherein：* residual stress effect in sample has been deducted.
After tested, this comparative example obtains nano-crystalline aluminium materials in 2~120K temperature ranges, the specific heat at constant pressure of nanocrystalline aluminium
For 692~788J/Kg.K, linear expansion coefficient (2-120K) is (2.16~3.02) × 10–5/K。
Embodiment 2
It for 99% 30 fine aluminiums of Φ is raw material that the present embodiment, which uses purity, is operated as follows：
1. hot rolling：The fine aluminium is rolled to 4 millimeters thicks；
2. heat treatment：High annealing, high temperature is to 315 DEG C, when holding 5 is small；
3. cold rolling：4 millimeters thick pure aluminum materials are cold rolled to 1.0 millimeters, cold-rolling deformation is 83% by length computation, that is, is obtained
Obtain nanocrystalline pure aluminum material.
The present embodiment can make the nanocrystalline fine aluminium of [1.0 × 45mm × arbitrarily long], pass through X-ray and transmission electron microscope point
Analysis, crystal grain of the present invention have reached nanoscale scope, and grain size test result is shown in Table 3.
Table 3 is 2 grain size test result of embodiment
| Grain size (average) | Test method | Measuring unit |
| 45nm* | X-ray | Metal Inst., Chinese Academy of Sciences |
| 79nm | Transmission electron microscope | Metal Inst., Chinese Academy of Sciences |
Wherein：* residual stress effect in sample has been deducted.
In nano-crystalline aluminium materials 2-120K temperature ranges manufactured in the present embodiment, the specific heat at constant pressure of nano aluminum for 585~
698J/kg.K, linear expansion coefficient (2-120K) are (1.31~1.72) × 10–5/K。
Comparative example 2
It for 99% 30 fine aluminiums of Φ is raw material that the present embodiment, which uses purity, is operated as follows：
1. hot rolling：The fine aluminium is rolled to 4 millimeters thicks；
2. heat treatment：High annealing, high temperature is to 350 DEG C, when holding 5 is small；
3. cold rolling：4 millimeters thick pure aluminum materials are cold rolled to 1.0 millimeters, cold-rolling deformation is 95% by length computation, that is, is obtained
Obtain nanocrystalline pure aluminum material.
The embodiment of the present invention can make the nanocrystalline fine aluminium of [1.0 × 45mm × arbitrarily long], pass through X-ray and transmission electricity
Mirror is analyzed, and crystal grain of the present invention has reached nanoscale scope, and grain size test result is shown in Table 4.
Table 4 is 2 grain size test result of comparative example
| Grain size (average) | Test method | Measuring unit |
| 80nm* | X-ray | Metal Inst., Chinese Academy of Sciences |
| 94nm | Transmission electron microscope | Metal Inst., Chinese Academy of Sciences |
Wherein：* residual stress effect in sample has been deducted.
After tested, this comparative example obtains nano-crystalline aluminium materials in 2-120K temperature ranges, and the specific heat at constant pressure of nano aluminum is
687-891J/Kg.K, linear expansion coefficient (2-120K) are (1.96~2.92) × 10–5/K。
Claims (2)
1. a kind of nano-crystalline aluminium materials, it is characterised in that：The nano-crystalline aluminium materials are using general industry aluminium as raw material, by such as
It is prepared by lower step operation：
1) hot rolling；
2) high annealing：Annealing temperature is in the range of 310~320 DEG C, when annealing time is 2~5 small；
3) deep cold rolling：Cold-rolling deformation degree is 80~85%；Obtain nano-crystalline aluminium materials；
For the nano-crystalline aluminium materials in 2~120K temperature ranges, the specific heat at constant pressure of nano-crystalline aluminium materials is 520~711J/
KgK, linear expansion coefficient are (1.15~1.82) × 10–5/K。
2. the application of nano-crystalline aluminium materials according to claim 1, it is characterised in that：The nano-crystalline aluminium materials are used to make
Standby nanocrystalline aluminum kitchen tools.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410562138.0A CN105586550B (en) | 2014-10-21 | 2014-10-21 | A kind of nano-crystalline aluminium materials and its application |
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| CN201410562138.0A CN105586550B (en) | 2014-10-21 | 2014-10-21 | A kind of nano-crystalline aluminium materials and its application |
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| CN105586550A CN105586550A (en) | 2016-05-18 |
| CN105586550B true CN105586550B (en) | 2018-05-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1190505C (en) * | 2001-10-10 | 2005-02-23 | 中国科学院金属研究所 | Deep cold rolling method of nano crystal metal material |
| JP4523390B2 (en) * | 2004-02-25 | 2010-08-11 | 三菱アルミニウム株式会社 | High corrosion resistance continuous cast aluminum alloy material and manufacturing method thereof |
| CN1966736A (en) * | 2005-11-16 | 2007-05-23 | 中国科学院金属研究所 | Process for preparing nano-crystalline aluminium materials |
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