CN110241367A - A kind of aluminium alloy method for toughening based on pulse current - Google Patents
A kind of aluminium alloy method for toughening based on pulse current Download PDFInfo
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- CN110241367A CN110241367A CN201910593245.2A CN201910593245A CN110241367A CN 110241367 A CN110241367 A CN 110241367A CN 201910593245 A CN201910593245 A CN 201910593245A CN 110241367 A CN110241367 A CN 110241367A
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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
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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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
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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
- C22F1/057—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 copper as the next major constituent
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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
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
Abstract
The invention discloses a kind of aluminium alloy method for toughening based on pulse current, concrete technology are the processing mode for combining aluminium alloy progress conventional process with Electric Pulse Treatment.This method have the characteristics that it is instantaneous quickly, it is high-energy, thump, extremely non-equilibrium, multi-functional, by adjusting pulsed current annealing parameter, cycle-index, mode and control refrigeration technique combine the treatment effects such as solid solution, timeliness, the recrystallization that aluminium alloy can be achieved, different institutional frameworks and combination of strength and toughness is obtained, the requirement of a variety of different service conditions is met.Compared with the sample of artificial aging after traditional solid solution, by the processed aluminium alloy of this patent processing method, it can be precipitated within a short period of time more, and smaller nanoscale precipitated phase, its comprehensive mechanical property can be greatly improved in millisecond magnitude, significantly improve working efficiency.This method can be used for the fields such as the Strengthening and Toughening of aluminium alloy.
Description
Technical field
The present invention relates to material processing and preparation technical fields, are mainly used at the Strengthening and Toughening of various commercial aluminum alloy
Reason.
Background technique
Aluminium alloy has good intensity and plasticity, has both excellent welding performance and corrosion resistance, is widely used in vapour
The fields such as vehicle, rail traffic and aerospace can be divided into heat treatment reinforcement type aluminium alloy according to schedule of reinforcement and can not be heat-treated
Enhanced type aluminium alloy.Not heat-treatable strengthened aluminium alloy type mainly passes through refinement crystal grain, and control recrystallizes to improve intensity, and can
Heat treatment reinforcement aluminium alloy can also effectively improve intensity by precipitation strength in addition to above-mentioned mechanism.However industrial technology is not
Disconnected development, processing and preparation to aluminium alloy propose high efficiency, the requirement of short route, the requirement to Mechanical Properties of Aluminum Alloys
It is higher and higher.Although traditional heat treatment mode has more mature technology pattern, since the processing time is long, technique is multiple
It is miscellaneous, it is unfavorable for industrial efficiency.Meanwhile the mechanical performance of aluminium alloy is also very sensitive to temperature, prior heat treatment is difficult
Efficiently control the stability of temperature.Therefore, the new process of comprehensive mechanical property a kind of efficient and that aluminium alloy can be improved is developed
It is the inexorable trend of aluminium alloy development.
As a kind of method of widely applied refinement crystal grain, the mode that deformation and heat treatment combines can pass through dynamic
Recrystallization, can effectively improve the mechanical property of aluminium alloy.However, the stacking fault energy due to aluminum substrate is higher, for being heat-treated work
The requirement of skill parameter and material is all very harsh.Other advanced technologies, such as Equal Channel Angular Pressing can provide a kind of using big
Deflection is come the method for preparing super fine crystal material.However for aluminium alloy, while obtaining ultra-fine grained structure, it can introduce
Many defects are unfavorable for the raising of plasticity.And since this method operation difficulty is larger, it is also difficult to be applied to industrial production at present.
The processing of high energy transient electrical pulses be it is a kind of in a very short period of time, make material in the form of electric-thermal-power THM coupling
The processing mode that microstructure and mechanical property significantly changes.Currently, selfreparing of the technology in material internal fatigue crack, knot
Structure relaxation, structure refinement, solidification of liquid metal etc. have had a wide range of applications.Meanwhile pulse current mentions at the same time
The intensity of high metal and the work in terms of plasticity are also confirmed.Therefore, using high energy instant pulse current to aluminium alloy into
Row processing has great importance to comprehensive mechanical property that is efficient and can improving aluminium alloy.
Summary of the invention
The purpose of the present invention is to provide a kind of aluminium alloy method for toughening based on pulse current, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of aluminium alloy method for toughening based on pulse current, comprising the following steps:
(1) aluminium alloy is handled to the initial state tissue that can be used for subsequent processing, is such as dissolved state, roll state, homogeneous state is moved back
Fiery state, aging state etc..
(2) in the case where additional constraint and cooling control, suitable processing opportunity is selected, aluminium alloy is carried out any time
Pulsed current annealing (electric current of several and order the conventional process (solid solution, timeliness, recrystallization, deformation process etc.) with certain parameter
Density, action time, endless form and number) mode that combines, such as: traditional solution+electric pulse timeliness, electric pulse solid solution+
Traditional artificial timeliness, traditional solution+Electric Pulse Treatment+traditional artificial timeliness, traditional solution+deformation process+Electric Pulse Treatment+biography
The modes such as artificial aging of uniting.
Preferably, in step (1), aluminium alloy can be 6061 aluminium alloys, ingredient percent content are as follows: 0.88%
Mg, 0.64%Si, 0.43%Fe, 0.24%Cu, 0.13%Cr, Al surplus.
Preferably, in step (1), aluminium alloy can be 2024 aluminium alloys, ingredient percent content are as follows: 4.42%
Cu, 1.49%Mg, 0.51%Mn, Al surplus.
Preferably, in step (1), aluminium alloy can be 7075 aluminium alloys, ingredient percent content are as follows: 5.63%
Zn, 2.35%Mg, 1.64%Cu, Al surplus.
Preferably, in step (2), current density should be 107A/m2~108A/m2The order of magnitude, processing the time should be millisecond
Magnitude.
Preferably, in step (2), cooling medium is water or air.
Preferably, in step (2), pulse current cycle-index can be 1-10 times, and intercycle cooling medium is water or sky
Gas.
A kind of aluminium alloy method for toughening based on pulse current of the present invention, principle are as follows: utilize the Joule heat of pulse current
Effect, electromigration effect and fast response time, the advantages that capacity usage ratio is high.In a very short period of time, largely there is certain drift speed
The electron stream and atomic kernel high speed impact of degree enable aluminum alloy to internal dislocation density and increase, it is more smaller that number density is precipitated
Nanoscale precipitated phase, and be precipitated nanometer phase intertwine with each other with dislocation, hinder burying in oblivion for ag(e)ing process Dislocations, make dislocation
Strengthen and the contribution of precipitation strength is more prominent, the tensile strength enabled aluminum alloy to is more excellent, while can enable aluminum alloy to occur fast
Speed recrystallization, quickly reduces the crystallite dimension of aluminium alloy, and the dislocation tangled make the precipitation of precipitated phase it is long receive greatly it is isotropic
It influences, and is grown to spherical, the plasticity enabled aluminum alloy to is improved significantly.Therefore, the THM coupling effect of Electric Pulse Treatment can
Precipitation strength, the effect of dislocation strengthening are amplified, eventually by Optimizing Process Parameters, realize the ultra-high strength and toughness of aluminium alloy.
A kind of aluminium alloy method for toughening based on pulse current of the present invention has below compared with traditional processing
The utility model has the advantages that
Pulse current can be precipitated that number density is more within a short period of time, and smaller nanoscale precipitated phase, comprehensive
Closing mechanical property can be greatly improved in millisecond magnitude, significantly improve working efficiency.
By selection alloy initial tissu state appropriate, suitable Electric Pulse Treatment opportunity, different tissues can be obtained
Structure and combination of strength and toughness meet a variety of different service condition requirements.
Pulsed current annealing can realize instantaneous quickly and outside alloy, the process that core heats simultaneously, and conventional process is then
It is first to be heated outside alloy, the process being heated after core.Compared with conventional process, pulsed current annealing makes the heating process of alloy
More uniformly.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the aluminium alloy method for toughening based on pulse current of the present invention.
Fig. 2 is the schematic diagram of the stress-strain diagram of aluminium alloy after each embodiment processing in the present invention, and specific value is listed in
In table 1.
Fig. 3 is the organizational topography of embodiment 1 in the present invention.Wherein (a) is solid solution state, is (b) solid solution+electric pulse examination
Sample is (c) precipitated phase Al in (b)5The full resolution pricture of FeSi (d) is solid solution+artificial aging sample, (e) is solid solution+electricity arteries and veins
Punching+artificial aging sample is (f) precipitated phase Mg in (d)2The full resolution pricture of Si is (g) precipitated phase Mg in (e)2The high score of Si
Distinguish image.
Fig. 4 is the organizational topography of embodiment 2 in the present invention.Wherein (a) is solid solution+artificial aging sample, is (b) solid solution
+ electric pulse sample is (c) the atom distribution map of cluster structure in solid solution+electric pulse sample, (d) in solid solution+electric pulse sample
The cluster distribution map of cluster structure.
Fig. 5 is the organizational topography of embodiment 3 in the present invention.Wherein (a) is the backscattered electron diffraction for rolling state sample
Figure (b) is rolling+electric pulse sample backscattered electron diffraction figure, is (c) organizational topography of rolling state sample, (d) is to roll
System+electric pulse sample organizational topography (e) is solid solution+artificial aging sample organizational topography, (f) is rolling+electric pulse
The organizational topography of sample.
Fig. 6 is the organizational topography of embodiment 4 in the present invention.Wherein (a), (c) be solid solution state sample, (b), (d) be solid
Molten+electric pulse sample.
Fig. 7 is the organizational topography of embodiment 5 in the present invention.Wherein (a) is solid solution state sample, (b) is electric pulse sample,
(c) it is grain size distribution histogram in (a), is (d) grain size distribution histogram in (b), (e) is solid solution+artificial aging
Sample (f) is electric pulse+artificial aging sample
Specific embodiment
Embodiment 1
Prepare 6000 high-intensitive line aluminium alloys.
A kind of aluminium alloy method for toughening based on pulse current in the present embodiment, comprising the following steps:
Step 1: obtaining 6061 aluminum alloy plate materials, ingredient percent content are as follows: 0.88%Mg, 0.64%Si,
0.43%Fe, 0.24%Cu, 0.13%Cr, Al surplus.
Step 2: the pretreatment before 6061 aluminum alloy plate materials are tested.6061 aluminium alloys of commercially available rolling state are used
Electric spark linear cutting machine is cut into 130mm*200mm*10mm, 510 DEG C is carried out to it with resistance furnace, destressing in 5 hours is moved back
Furnace cooling fight to room temperature.
Step 3: 6061 aluminium alloys are processed into suitably sized.6061 aluminium alloys after annealing are cut with wire electric discharge
Cutting mill bed is cut into the sheet specimens of 65mm*10mm*3mm.
Step 4: the processing mode that 6061 aluminium alloys progress conventional process is combined with Electric Pulse Treatment
A. 6061 aluminium alloys after stress relief annealing are carried out 550 DEG C with resistance furnace, water cooling is to room after solution treatment in 1 hour
Temperature.
B. 6061 aluminium alloys in a are subjected to electric pulse using the electrical pulse device of homemade silicon-controlled current amplification circuit
Processing, frequency 50HZ, current density 6.643*107A/m2, the processing time is 240ms, and length is effectively treated (i.e. in sample
Spacing between electrode) it is 50mm, then it is air-cooled to room temperature.Then 6061 aluminium alloys after electric pulse are carried out with resistance furnace
175 DEG C, artificial aging processing in 6 hours.
The sample to compare with sample in this patent, using traditional solution+artificial aging processing mode, solution treatment is adopted
550 DEG C are carried out with resistance furnace, water cooling to room temperature, artificial aging carries out 175 DEG C, 8 hours using resistance furnace after solution treatment in 1 hour
Artificial aging processing.
By the sample that the present embodiment is handled, compared with traditional solution+artificial aging sample, dislocation density has bright
Aobvious raising, precipitated phase Al5FeSi amount of precipitation is more, and intertwine with each other with dislocation, so that dislocation is able in ag(e)ing process
Retain, while dislocation makes precipitated phase Mg2The growth of Si is intended to isotropism, so that the strong plasticity of the sample is mentioned simultaneously
It is high.
By the sample that the present embodiment is handled, tensile property has significantly compared to the alloy of conventional process at room temperature
It improves, room temperature tensile intensity is 421.0MPa, fracture elongation 22.4%.With traditional solution+artificial aging sample
It compares, tensile strength improves 47.2%, and fracture elongation only has the decline of slight amplitude.This patent processing sample its
Comprehensive mechanical property is 623.7MPa, and the sample than conventional process improves 27.4%.Meanwhile the artificial aging with conventional process
Peak value timeliness is compared within 8 hours, and the sample of this patent processing shortens peak aging time 2 hours, is improved work efficiency.
Embodiment 2
Prepare 6000 line aluminium alloys of high-ductility.
A kind of aluminium alloy method for toughening based on pulse current in the present embodiment, comprising the following steps:
Step 1: obtaining 6061 aluminum alloy plate materials, ingredient percent content are as follows: 0.88%Mg, 0.64%Si,
0.43%Fe, 0.24%Cu, 0.13%Cr, Al surplus.
Step 2: the pretreatment before 6061 aluminum alloy plate materials are tested.6061 aluminium alloys of commercially available rolling state are used
Electric spark linear cutting machine is cut into 130mm*200mm*10mm, 510 DEG C is carried out to it with resistance furnace, destressing in 5 hours is moved back
Furnace cooling fight to room temperature.
Step 3: 6061 aluminium alloys are processed into suitably sized.6061 aluminium alloys are cut with electric spark linear cutting machine
It is cut into the sheet specimens of 65mm*10mm*3mm.
Step 4: the processing mode that 6061 aluminium alloys progress conventional process is combined with Electric Pulse Treatment
A. 6061 aluminium alloys after stress relief annealing are carried out 550 DEG C with resistance furnace, water cooling is to room after solution treatment in 1 hour
Temperature.
B. 6061 aluminium alloys in a are subjected to electric pulse using the electrical pulse device of homemade silicon-controlled current amplification circuit
Processing, frequency 50HZ, current density 5.146*107A/m2, the processing time is 560ms, and length is effectively treated (i.e. in sample
Spacing between electrode) it is 50mm, then it is air-cooled to room temperature.
The sample to compare with sample in this patent, using traditional solution+artificial aging processing mode, solution treatment is adopted
550 DEG C are carried out with resistance furnace, water cooling to room temperature, artificial aging carries out 175 DEG C, 8 hours using resistance furnace after solution treatment in 1 hour
Artificial aging processing.
By the sample that the present embodiment is handled, compared with traditional solution+artificial aging sample, precipitated phase is size pole
For tiny nanocluster Mg2(Si,Cu)3, the internal high density dislocation to tangle makes intra-die generate more crystal grain to take
To, more sub boundaries are generated, meanwhile, sub boundary plays inhibition to the extension of crackle.Therefore, the strong plasticity of the sample
It is improved significantly.
By the sample that the present embodiment is handled, tensile property has significantly compared to the alloy of conventional process at room temperature
It improves, room temperature tensile intensity is 292.6MPa, fracture elongation 40.6%.With traditional solution+artificial aging sample
It compares, fracture elongation improves 78.8%, and tensile strength is slightly above the sample of conventional process.With the sample of traditional solution
It compares, tensile strength improves 48.9%.Its comprehensive mechanical property of sample of this patent processing is 533.8MPa, at tradition
The sample of reason improves 9.1%.The sample preparation time handled in this patent is millisecond magnitude, therefore when substantially reducing processing
Between, improve process efficiency.
Embodiment 3
Preparation is high-intensitive, 6000 line aluminium alloys of high-ductility.
A kind of aluminium alloy method for toughening based on pulse current in the present embodiment, comprising the following steps:
Step 1: obtaining 6061 aluminum alloy plate materials, ingredient percent content are as follows: 0.88%Mg, 0.64%Si,
0.43%Fe, 0.24%Cu, 0.13%Cr, Al surplus.
Step 2: the pretreatment before 6061 aluminum alloy plate materials are tested.6061 aluminium alloys of commercially available rolling state are used
Electric spark linear cutting machine is cut into 130mm*200mm*10mm, 510 DEG C is carried out to it with resistance furnace, destressing in 5 hours is moved back
Furnace cooling fight to room temperature.
Step 3: 6061 aluminium alloys are processed into suitably sized.6061 aluminium alloys are cut with electric spark linear cutting machine
It is cut into the sheet specimens of 65mm*10mm*5mm.
Step 4: by 6061 aluminium alloys with 40% drafts of single pass carry out room temperature rolling, after rolling with a thickness of 3mm.
Step 5: 6061 aluminium alloys after rolling are carried out the processing mode that conventional process is combined with Electric Pulse Treatment
A. 6061 aluminium alloys after rolling are carried out 550 DEG C with resistance furnace, water cooling is to room temperature after solution treatment in 1 hour.
B. 6061 aluminium alloys in a are subjected to electric pulse using the electrical pulse device of homemade silicon-controlled current amplification circuit
Processing, frequency 50HZ, current density 6.643*107A/m2, the processing time is 240ms, and length is effectively treated (i.e. in sample
Spacing between electrode) it is 50mm, then it is air-cooled to room temperature.Then 6061 aluminium alloys after electric pulse are carried out with resistance furnace
175 DEG C, artificial aging processing in 4 hours.
The sample to compare with sample in this patent, using traditional solution+artificial aging processing mode, solution treatment is adopted
550 DEG C are carried out with resistance furnace, water cooling to room temperature, artificial aging carries out 175 DEG C, 8 hours using resistance furnace after solution treatment in 1 hour
Artificial aging processing.
Faster recrystallization process, sample are realized compared with the sample of rolling state by the sample that the present embodiment is handled
Interior dislocation tangle is broken, and compared with traditional solution+artificial aging sample, forms a kind of new tiny precipitated phase.Cause
This, the strong plasticity of the sample is improved significantly.
By the sample that the present embodiment is handled, tensile property has significantly compared to the alloy of conventional process at room temperature
It improves, room temperature tensile intensity is 383.4MPa, fracture elongation 28.1%.With traditional solution+artificial aging sample
It compares, tensile strength improves 33.9%, and fracture elongation improves 23.7%.Its resultant force of the sample of this patent processing
Performance is 600.9MPa, improves 22.8% than conventional process sample.Meanwhile with 8 hours peaks of the artificial aging of conventional process
Value timeliness is compared, and the sample of this patent processing shortens peak aging time 4 hours, is improved work efficiency.
Embodiment 4
A kind of aluminium alloy method for toughening based on pulse current in the present embodiment, comprising the following steps:
Step 1: obtaining 2024 aluminium alloys, ingredient percent content are as follows: 4.42%Cu, 1.49%Mg, 0.51%
Mn, Al surplus.
Step 2: 2024 aluminium alloys are carried out 490 DEG C with resistance furnace, 24 hours homogenize process, then with milling train pair
The sample of 6mm thickness carries out 350 DEG C, the hot rolling of 30% drafts per pass, until being rolled down to 2mm.Then, Wire EDM is used
Lathe is cut into the sheet specimens of 45mm*10mm*2mm.
Step 3: 2024 aluminium alloys are carried out 495 DEG C with resistance furnace, water cooling is to room temperature after solution treatment in 40 minutes.
Step 4: by 2024 aluminium alloys after solid solution using homemade silicon-controlled current amplification circuit electrical pulse device into
Row Electric Pulse Treatment, frequency 50HZ, current density 1.90*108A/m2, number of processes is 10 times, and the single treatment time is
100ms is then air-cooled to room temperature.
The sample to compare with sample in this patent, using the processing mode of traditional solution, solution treatment uses resistance furnace
495 DEG C are carried out, water cooling is to room temperature after solution treatment in 40 minutes.
By the sample that the present embodiment is handled, compared with the sample of traditional solution, precipitated phase Al20Cu2Mn3Amount of precipitation
More, and shape is more regular, be distributed it is more uniform, precipitated phase by dislocation surround grow, and in traditional solution sample almost without
It can be seen that dislocation is distributed, and precipitated phase blurred form.Therefore, the mechanical property of the sample is improved.
By the sample that the present embodiment is handled, tensile property has obviously compared to the alloy of traditional solution processing at room temperature
Raising, room temperature tensile intensity be 465MPa, yield strength 301MPa, fracture elongation 31%.It is solid with tradition
Molten alloy is compared, and tensile strength improves 4.97%, and yield strength improves 13.58%, and fracture elongation improves
18.77%.Its comprehensive mechanical property of sample of this patent processing is 688.7MPa, than the sample 655.5MPa of traditional solution processing
Improve 5.06%.The sample preparation time handled in this patent is millisecond magnitude, improves alloy in a very short period of time
Comprehensive mechanical property.
Embodiment 5
A kind of aluminium alloy method for toughening based on pulse current in the present embodiment, comprising the following steps:
Step 1: obtaining 7075 aluminium alloys, ingredient percent content are as follows: 5.63%Zn, 2.35%Mg, 1.64%
Cu, Al surplus.
Step 2: 7075 aluminium alloys are carried out 460 DEG C with resistance furnace, 24 hours homogenize process, then with milling train pair
The sample of 5.4mm thickness carries out 350 DEG C, per pass less than the hot rolling of 30% drafts, until being rolled down to 2mm.Then, electric spark is used
Wire cutting machine tool is cut into the sheet specimens of 50mm*10mm*2mm.
Step 3: by 2024 aluminium alloys after solid solution using homemade silicon-controlled current amplification circuit electrical pulse device into
Row Electric Pulse Treatment, frequency 50HZ, current density 2*108A/m2, the processing time is 220ms, subsequent water cooling to room temperature.
Then, 120 DEG C are carried out to the sample after Electric Pulse Treatment with resistance furnace, 24 hours artificial agings.
The sample to compare with sample in this patent, using traditional solution+artificial aging processing mode, solution treatment is adopted
475 DEG C are carried out with resistance furnace, water cooling to room temperature, artificial aging carries out 120 DEG C using resistance furnace after solution treatment in 1 hour, and 24 is small
When artificial aging.
Sample recrystallization by the sample that the present embodiment is handled, compared with the alloy of traditional solution, after Electric Pulse Treatment
Crystallite dimension is 15 μm, and compared with the sample of traditional solution processing, recrystal grain reduces the size of 71.7%.Meanwhile it analysing
Tiny precipitated phase can hinder solute motion out, delay the roughening of precipitated phase, be improved the mechanical property of the sample.
By the sample that the present embodiment is handled, tensile property compares the conjunction of traditional solution processing+artificial aging at room temperature
Golden intensity improves, and fracture elongation has slight decline.The sample preparation time handled in this patent is milli
Second-time hinders growing up for crystal grain in a very short period of time, improves the intensity of alloy.Therefore, the processing method of this patent
It can be used as a kind of mode of quick reinforced alloys.
The present invention is not limited to the above embodiments, in technical foundation disclosed by the invention, those skilled in the art
According to disclosed technology contents, do not need creative work and can make some of which technical characteristic some simply to repair
Change, equivalent variations and modification, belongs in the range of technical solution of the present invention.
In the description of this specification, it should be noted that unless otherwise clearly defined and limited, term " electric pulse
Processing " shall be understood in a broad sense, such as can be electric pulse processing, be also possible to exchange Electric Pulse Treatment.For this field
Those of ordinary skill for, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Table 1
Claims (7)
1. a kind of aluminium alloy method for toughening based on pulse current, it is characterised in that:
This method is based on joule heating effect, and electron wind is impacted, the effects such as electromigration, by way of electric-thermal-power THM coupling,
Cooperate additional constraint, control cooling method, selects alloy initial tissu state appropriate, suitable Electric Pulse Treatment opportunity,
Apply the pulsed current annealing of certain parameter to aluminium alloy, comprising: current density, action time, cycle-index and mode, it is cooling
Mode etc..For non-ageing strengthening aluminium alloy, Electric Pulse Treatment can be recrystallized by refinement crystal grain, change dislocation configuration, control
Equal realizations are strengthened；For can ageing strengthening aluminium alloy, in addition to above-mentioned mechanism, can also by change its precipitate size, pattern, point
Cloth and the precipitation realizations such as order and process are strengthened.
2. a kind of aluminium alloy method for toughening based on pulse current according to claim 1, it is characterised in that selected
Aluminium alloy is any one industrial aluminium alloy.
3. electric-thermal according to claim 1-power THM coupling mode, it is characterized in that referring to that the electric field of instantaneous high energy is super
The joule thermal field being rapidly heated, the side that the stress field (thermal stress, transformation stress, magnetostrictive power) of additional constraint combines
Formula.
4. additional constraint according to claim 1 controls cooling mode, it is characterized in that referring to additional at the both ends of sample
From without the constraint for being tied to the drawing for applying arbitrary size, pressure or twisting resistance；Control cooling refers to selects after pulsed current annealing
(cooling medium includes water, oil, air, liquid nitrogen and various can be used for cooling Single Medium or compound Jie for the suitable type of cooling
Matter etc.) alloy is cooled down immediately.
5. according to claim 1 select suitable initial state, a kind of suitable subsequent processing is selected it is characterized in that referring to
Initial state can be solid solution state, roll state, homogeneous state, annealed state, any one state such as aging state.
6. according to claim 1 select suitable pulsed current annealing opportunity, it is characterized in that include arbitrary number of times and
The mode that the conventional process (solid solution, timeliness, recrystallization, deformation process etc.) of order is combined with pulsed current annealing, such as: tradition
Solid solution+electric pulse timeliness, electric pulse solid solution+traditional artificial timeliness, traditional solution+Electric Pulse Treatment+traditional artificial timeliness, tradition
The modes such as solid solution+deformation process+Electric Pulse Treatment+traditional artificial timeliness are matched to obtain different institutional framework and obdurability
It closes, meets a variety of different service condition requirements.
7. the pulsed current annealing according to claim 1 for applying certain parameter to aluminium alloy, comprising:
Current density, action time, cycle-index and mode, type of cooling etc. are that pulse current single is made it is characterized in that referring to
With 10 μ s-1000ms of time, current density 102-109A/m2The order of magnitude, can reach make aluminium alloy artificial aging temperature with
On any combination, pulse processing cycle-index be 1-30 time, if cycle-index be more than once, endless form is single treatment
(interval time is cooling medium when interval more than or equal to minimum time required for the type of cooling to the mode at having time interval afterwards
For water, oil, air, liquid nitrogen and various it can be used for cooling Single Medium or complex media etc.).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110592509A (en) * | 2019-10-16 | 2019-12-20 | 吉林大学 | Titanium alloy strengthening and toughening treatment method based on pulse current |
| CN111366599A (en) * | 2020-04-20 | 2020-07-03 | 武汉理工大学 | Rapid nanocrystallization experimental method for titanium-based composite material reinforcement |
| CN111549305A (en) * | 2020-05-18 | 2020-08-18 | 中南大学 | Strengthening and toughening method for magnesium alloy strip |
| CN111575612A (en) * | 2020-05-18 | 2020-08-25 | 中南大学 | Toughening method of non-ferrous metal material |
| CN112226707A (en) * | 2020-09-28 | 2021-01-15 | 东南大学 | Processing method of room-temperature reinforced aluminum alloy |
| CN112725711A (en) * | 2020-12-21 | 2021-04-30 | 山东大学 | Method for improving fatigue performance of high-strength aluminum alloy |
| CN112760577A (en) * | 2020-12-28 | 2021-05-07 | 中南大学 | Method for simultaneously improving strength and plasticity of 2219 aluminum-based AlCoCrFeNi composite material plate |
| CN112941440A (en) * | 2021-01-28 | 2021-06-11 | 北京科技大学 | Method for preparing non-equilibrium ultrafine structure alloy by using high-energy beam |
| CN113249664A (en) * | 2021-05-14 | 2021-08-13 | 安徽力幕新材料科技有限公司 | Processing method and processing equipment for light-weight high-strength aluminum alloy |
| CN113265602A (en) * | 2021-05-17 | 2021-08-17 | 中南大学 | Heat treatment method for rapidly improving strength of aluminum alloy |
| CN113355613A (en) * | 2021-05-27 | 2021-09-07 | 江苏瑞吉达建材科技有限公司 | Production process for improving comprehensive performance of aluminum alloy plate |
| CN113564501A (en) * | 2021-07-20 | 2021-10-29 | 苏州大学 | Heat treatment method of die-casting aluminum alloy plate |
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| CN114836601A (en) * | 2022-04-13 | 2022-08-02 | 上海理工大学 | Rapid heat treatment device and heat treatment method for alloy sheet sample |
| CN116689531A (en) * | 2023-08-09 | 2023-09-05 | 成都先进金属材料产业技术研究院股份有限公司 | Preparation method of high-strength TC4 pipe |
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| CN110592509B (en) * | 2019-10-16 | 2021-09-07 | 吉林大学 | Titanium alloy strengthening and toughening treatment method based on pulse current |
| CN110592509A (en) * | 2019-10-16 | 2019-12-20 | 吉林大学 | Titanium alloy strengthening and toughening treatment method based on pulse current |
| CN111366599A (en) * | 2020-04-20 | 2020-07-03 | 武汉理工大学 | Rapid nanocrystallization experimental method for titanium-based composite material reinforcement |
| CN111549305A (en) * | 2020-05-18 | 2020-08-18 | 中南大学 | Strengthening and toughening method for magnesium alloy strip |
| CN111575612A (en) * | 2020-05-18 | 2020-08-25 | 中南大学 | Toughening method of non-ferrous metal material |
| CN111575612B (en) * | 2020-05-18 | 2021-04-13 | 中南大学 | Toughening method of non-ferrous metal material |
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| CN112941440A (en) * | 2021-01-28 | 2021-06-11 | 北京科技大学 | Method for preparing non-equilibrium ultrafine structure alloy by using high-energy beam |
| CN113249664A (en) * | 2021-05-14 | 2021-08-13 | 安徽力幕新材料科技有限公司 | Processing method and processing equipment for light-weight high-strength aluminum alloy |
| CN113265602A (en) * | 2021-05-17 | 2021-08-17 | 中南大学 | Heat treatment method for rapidly improving strength of aluminum alloy |
| CN113355613A (en) * | 2021-05-27 | 2021-09-07 | 江苏瑞吉达建材科技有限公司 | Production process for improving comprehensive performance of aluminum alloy plate |
| CN113564501A (en) * | 2021-07-20 | 2021-10-29 | 苏州大学 | Heat treatment method of die-casting aluminum alloy plate |
| CN114836601A (en) * | 2022-04-13 | 2022-08-02 | 上海理工大学 | Rapid heat treatment device and heat treatment method for alloy sheet sample |
| CN114836703A (en) * | 2022-05-05 | 2022-08-02 | 东南大学 | Preparation method of high-elongation continuous cast-rolling CC3003 aluminum alloy foil |
| CN116689531A (en) * | 2023-08-09 | 2023-09-05 | 成都先进金属材料产业技术研究院股份有限公司 | Preparation method of high-strength TC4 pipe |
| CN116689531B (en) * | 2023-08-09 | 2023-10-27 | 成都先进金属材料产业技术研究院股份有限公司 | Preparation method of high-strength TC4 pipe |
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