CN106086732A - A kind of aluminium lithium alloy product and processing method - Google Patents
A kind of aluminium lithium alloy product and processing method Download PDFInfo
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- CN106086732A CN106086732A CN201610588811.7A CN201610588811A CN106086732A CN 106086732 A CN106086732 A CN 106086732A CN 201610588811 A CN201610588811 A CN 201610588811A CN 106086732 A CN106086732 A CN 106086732A
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- lithium alloy
- aluminium lithium
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- temperature
- cooling
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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
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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
Abstract
The invention discloses a kind of aluminium lithium alloy processing method, the method step includes: Homogenization Treatments, and to aluminium lithium alloy homogenizing cast ingot, and the type of cooling of described Homogenization Treatments uses the mode forcing quickly cooling；Low-temperature heat；Thermal processing distortion；Force quickly cooling；Finished heat treatment.Said method, the type of cooling at Homogenization Treatments uses forces quickly cooling to prevent aluminium lithium alloy to form thick needle-like Widmannstatten structure, thus improve ingot casting hot-workability at a lower temperature, and the quenching effect that the pressure of Homogenization Treatments process rapidly cools to form can be completely eliminated when hot-working preheats；Take low-temperature heat during hot-working, dynamic recrystallization degree can be reduced；Blank product after hot-working carries out forcing quickly to cool down suppressing Static Recrystallization again.Thus improve intensity and the toughness of aluminium lithium alloy final products.The invention also discloses a kind of aluminium lithium alloy product.
Description
Technical field
The present invention relates to technical field of metallurgy industry, particularly relate to a kind of aluminium lithium alloy product and processing method.
Background technology
In our daily life, aluminum products and Al-alloy products can be found everywhere, but aluminum and alloy thereof typically have relatively
Good plasticity, it is easy to plastic working.The phase component of duralumin is more complicated, there is the friable tissues such as low melt-phase and intermetallic compound,
Its plastic working has Some features: internal stress and intracrystalline as carried out producing when Homogenization Treatments eliminates ingot casting cooling are inclined
Analysis；Ingot casting surface Milling Process to be carried out, removes the surface segregation thing that low melt-phase produces.Some aluminium alloy for improve corrosion resistance and
Processing characteristics is also performed to alclad.Aluminium alloy has overheated and burning sensitivity, it is necessary to strictly control heating-up temperature.
Aluminum and aluminium alloy plastic molding method are a lot, are generally deforming at the temperature profile and workpiece adding man-hour by workpiece
Stress in journey is classified with mode of texturing (stress one strain regime).Typically press workpiece temperature in the course of processing special
Levying, aluminum and aluminium alloy processing can be divided into hot-working, cold working and temperature processing.Wherein, hot-working refers to that aluminum and aluminium alloy cast ingot exist
The plastic forming process more than recrystallization temperature completed.During hot-working, the plasticity of ingot casting is higher and resistance of deformation is relatively low, permissible
The equipment less by ability produces the product that deflection is bigger；Cold working refers to below the temperature not producing Recovery and recrystallization
The plastic forming process completed, cold worked essence is the process combination process of cold working and intermediate annealing；Temperature processing is to be situated between
Plastic forming process between hot and cold processing, the main purpose of temperature processing is to reduce the resistance of deformation of metal and raising
The plastic property (processability) of metal.
And aluminium lithium alloy reduces the element of stacking fault energy owing to the addition of Li etc., thermal deformation adds more conventional aluminium alloy in man-hour and is more easy to
There is various recrystallization (dynamic recrystallization, meta-dynamic recrystallization and Static Recrystallization), and along with the increase of recrystallization degree, aluminum
Lithium alloy intensity and toughness are all declining.At present, mainly add trace element, or disperse phase during homogenization is controlled
System, and the improvement to hot procedure itself is less, causes aluminium lithium alloy final products intensity and toughness the highest.
In sum, aluminium lithium alloy final products intensity and the highest problem of toughness how are solved, it has also become this area skill
The technical barrier that art personnel are urgently to be resolved hurrily.
Summary of the invention
It is an object of the invention to provide a kind of aluminium lithium alloy product and processing method, to improve aluminium lithium alloy final products
Intensity and toughness.
To achieve these goals, the invention provides a kind of aluminium lithium alloy processing method, it is as follows that the method comprising the steps of:
Homogenization Treatments, to aluminium lithium alloy homogenizing cast ingot, and the type of cooling of described Homogenization Treatments uses strong
The mode of system quickly cooling；
Low-temperature heat, carries out low-temperature heat, described low-temperature heat to the described aluminium lithium alloy ingot casting after Homogenization Treatments
Temperature range more than aluminium lithium alloy recrystallization temperature, below solidus temperature；
Thermal processing distortion, carries out thermal processing distortion to the described aluminum lithium ingot casting after low-temperature heat, it is thus achieved that blank product；
Force quickly cooling, use the mode forcing quickly cooling to cool down described blank product；
Finished heat treatment, carries out finished heat treatment to product, it is thus achieved that product desired properties.
Preferably, the mode that described pressure quickly cools down uses the mode of artificial water-cooled.
Preferably, the temperature range of described low-temperature heat is 420 DEG C-460 DEG C.
Compared with introducing content with background technology, in technique scheme, the aluminium lithium alloy processing side that the present invention provides
Method, the type of cooling at Homogenization Treatments uses forces quickly cooling to prevent aluminium lithium alloy to form thick needle-like Wei Shi group
Knit, thus improve ingot casting hot-workability at a lower temperature, and the pressure of Homogenization Treatments process rapidly cools to form quenches
Fire effect can be completely eliminated when hot-working preheats；Take low-temperature heat during hot-working, dynamic recrystallization degree can be reduced；
Blank product after hot-working carries out forcing quickly to cool down suppressing Static Recrystallization again.Thus it is final to improve aluminium lithium alloy
The intensity of product and toughness.
The invention also discloses a kind of aluminium lithium alloy product, this aluminium lithium alloy product is for have employed described by any of the above-described item
Method manufacture aluminium lithium alloy product.Owing to the method has above-mentioned technique effect, the aluminium lithium alloy applying the method produces
Product also should have corresponding technique effect.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
Fig. 1 is the processing method flow chart of aluminium lithium alloy product of the present invention.
In figure 1 above:
Homogenization Treatments 100, low-temperature heat 200, thermal processing distortion 300, pressure quickly cooling 400.Finished heat treatment
500。
Detailed description of the invention
The core of the present invention is to provide a kind of aluminium lithium alloy product and processing method, to improve aluminium lithium alloy final products
Intensity and toughness..
In order to make those skilled in the art be more fully understood that the technical scheme that the present invention provides, below in conjunction with accompanying drawing and
The present invention is described in further detail for specific embodiment.
As it is shown in figure 1, the processing method of the aluminium lithium alloy product of embodiment of the present invention offer, the method comprising the steps of such as
Under:
Homogenization Treatments 100, to aluminium lithium alloy homogenizing cast ingot, and the type of cooling of Homogenization Treatments uses and forces
The quickly mode of cooling；
Low-temperature heat 200, carries out low-temperature heat to the aluminium lithium alloy ingot casting after Homogenization Treatments, the temperature of this low-temperature heat
Degree scope is more than aluminium lithium alloy recrystallization temperature, below solidus temperature；
Thermal processing distortion 300, carries out thermal processing distortion to the aluminum lithium ingot casting after low-temperature heat, it is thus achieved that blank product；
Force quickly cooling 400, force the mode quickly cooled down to cool down blank product；
Finished heat treatment 500, carries out finished heat treatment to product, it is thus achieved that product desired properties.
It should be noted that general Homogenization Treatments (being again homogenizing annealing) process be by the ingot casting of certain alloy or
Foundry goods is heated to a certain higher temperature of below this alloy solidus, long-time heat preservation, the then annealing process of Slow cooling.Also known as
Diffusion annealing.
It is further to note that the purpose of finished heat treatment generally improves the intensity of product, hardness, the property such as corrosion-resistant
Energy.According to product desired properties, product is carried out the finished heat treatment of correspondence.
Compared with introducing content with background technology, in technique scheme, the aluminium lithium alloy processing side that the present invention provides
Method, the type of cooling at Homogenization Treatments uses forces quickly cooling to prevent aluminium lithium alloy to form thick needle-like Wei Shi group
Knit, thus improve ingot casting hot-workability at a lower temperature, and the pressure of Homogenization Treatments process rapidly cools to form quenches
Fire effect can be completely eliminated when hot-working preheats；Take low-temperature heat during hot-working, dynamic recrystallization degree can be reduced；
Blank product after hot-working carries out forcing quickly to cool down suppressing Static Recrystallization again.Thus it is final to improve aluminium lithium alloy
The intensity of product and toughness.
Aluminium lithium alloy product of the present invention and traditional diamond-making technique obtain the strength and toughness contrast table of product, as shown in table 1 below
Table 1
Contrast situation by upper table 1, it can be seen that obtain product compared to traditional diamond-making technique, through the inventive method
Obtain product all to significantly improve at aspects such as yield strength, tensile strength, fracture toughnesses.
Further in technical scheme, the mode that above-mentioned pressure quickly cools down uses the mode of artificial water-cooled.It is of course possible to reason
Solve is that other types of cooling that those skilled in the art can also be used to commonly use quickly cool down, and such as other coolants are entered
Row cooling etc., only embodiments of the invention preferably employ the mode of water-cooled.
Further, the temperature range of above-mentioned low-temperature heat is 420 DEG C-460 DEG C.Of course, it should be understood that it is all right
More than aluminium lithium alloy recrystallization temperature, below solidus temperature in the range of other temperature, the only enforcement of the present invention
Example preferably employs said temperature scope.
Present invention also offers a kind of aluminium lithium alloy product, this aluminium lithium alloy product is for have employed described by any of the above-described item
Method manufacture aluminium lithium alloy product.Owing to the method has above-mentioned technique effect, the aluminium lithium alloy applying the method produces
Product also should have corresponding technique effect, does not repeats them here.
Above aluminium lithium alloy product provided by the present invention and processing method are described in detail.Need explanation
Being that each embodiment in this specification all uses the mode gone forward one by one to describe, what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar part sees mutually.
Also, it should be noted in this article, the relational terms of such as first and second or the like is used merely to one
Entity or operation separate with another entity or operating space, and not necessarily require or imply between these entities or operation
There is relation or the order of any this reality.And, term " includes ", " comprising " or its any other variant are intended to contain
Comprising of lid nonexcludability, so that include that the article of a series of key element or equipment not only include those key elements, but also
Including other key elements being not expressly set out, or also include the key element intrinsic for this article or equipment.Do not having
In the case of more restrictions, statement " including ... " key element limited, it is not excluded that at the article including above-mentioned key element
Or equipment there is also other identical element.
Principle and the embodiment of the present invention are set forth by specific case used herein, saying of above example
Bright method and the core concept thereof being only intended to help to understand the present invention.It should be pointed out that, the ordinary skill for the art
For personnel, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve
Also fall in the protection domain of the claims in the present invention with modifying.
Claims (4)
1. the processing method of an aluminium lithium alloy product, it is characterised in that it is as follows that the method comprising the steps of:
Homogenization Treatments (100), to aluminium lithium alloy homogenizing cast ingot, and the type of cooling of described Homogenization Treatments uses strong
The mode of system quickly cooling；
Low-temperature heat (200), carries out low-temperature heat, described low-temperature heat to the described aluminium lithium alloy ingot casting after Homogenization Treatments
Temperature range more than aluminium lithium alloy recrystallization temperature, below solidus temperature；
Thermal processing distortion (300), carries out thermal processing distortion to the described aluminium lithium alloy ingot casting after low-temperature heat, it is thus achieved that blank is produced
Product；
Force quickly cooling (400), force the mode quickly cooled down to cool down described blank product；
Finished heat treatment (500), carries out finished heat treatment to product, it is thus achieved that product desired properties.
2. the method for claim 1, it is characterised in that the mode that described pressure quickly cools down uses the side of artificial water-cooled
Formula.
3. the method for claim 1, it is characterised in that the temperature range of described low-temperature heat is 420 DEG C-460 DEG C.
4. an aluminium lithium alloy product, it is characterised in that described aluminium lithium alloy product is for have employed such as any one of claim 1-3
The aluminium lithium alloy product that described method manufactures.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021457A (en) * | 2010-10-27 | 2011-04-20 | 中国航空工业集团公司北京航空材料研究院 | High-toughness aluminum lithium alloy and preparation method thereof |
| CN102634707A (en) * | 2012-05-10 | 2012-08-15 | 中南大学 | Ultrahigh-strength aluminum lithium alloy and thermal treatment technology |
| CN103173702A (en) * | 2013-03-15 | 2013-06-26 | 中国航空工业集团公司北京航空材料研究院 | High-temperature annealing method of Al-Li-Cu-X serial aluminum lithium alloy |
| CN103993205A (en) * | 2014-04-16 | 2014-08-20 | 池州市光明塑钢有限公司 | High-elongation aluminum alloy section bar and making method thereof |
-
2016
- 2016-07-25 CN CN201610588811.7A patent/CN106086732B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021457A (en) * | 2010-10-27 | 2011-04-20 | 中国航空工业集团公司北京航空材料研究院 | High-toughness aluminum lithium alloy and preparation method thereof |
| CN102634707A (en) * | 2012-05-10 | 2012-08-15 | 中南大学 | Ultrahigh-strength aluminum lithium alloy and thermal treatment technology |
| CN103173702A (en) * | 2013-03-15 | 2013-06-26 | 中国航空工业集团公司北京航空材料研究院 | High-temperature annealing method of Al-Li-Cu-X serial aluminum lithium alloy |
| CN103993205A (en) * | 2014-04-16 | 2014-08-20 | 池州市光明塑钢有限公司 | High-elongation aluminum alloy section bar and making method thereof |
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