CN110135073A - A kind of ultra-high-strength aluminum alloy pulse current regulation casting analogy method - Google Patents
A kind of ultra-high-strength aluminum alloy pulse current regulation casting analogy method Download PDFInfo
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- CN110135073A CN110135073A CN201910410202.6A CN201910410202A CN110135073A CN 110135073 A CN110135073 A CN 110135073A CN 201910410202 A CN201910410202 A CN 201910410202A CN 110135073 A CN110135073 A CN 110135073A
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- 238000005266 casting Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 56
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 47
- 230000033228 biological regulation Effects 0.000 title claims abstract description 17
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 238000009826 distribution Methods 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 16
- 238000007711 solidification Methods 0.000 claims abstract description 15
- 230000008023 solidification Effects 0.000 claims abstract description 15
- 238000004520 electroporation Methods 0.000 claims abstract description 10
- 238000000518 rheometry Methods 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 238000013019 agitation Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 230000009969 flowable effect Effects 0.000 claims abstract description 7
- 238000003801 milling Methods 0.000 claims abstract description 7
- 238000005457 optimization Methods 0.000 claims abstract description 7
- 238000007710 freezing Methods 0.000 claims abstract description 5
- 230000008014 freezing Effects 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 238000005204 segregation Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 16
- 230000007547 defect Effects 0.000 claims description 10
- 238000005275 alloying Methods 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims 1
- 239000000047 product Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010348 incorporation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 210000001367 artery Anatomy 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000010210 aluminium Nutrition 0.000 description 1
- 230000002180 anti-stress Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Continuous Casting (AREA)
Abstract
A kind of ultra-high-strength aluminum alloy pulse current regulation casting analogy method, is related to a kind of casting analogy method, comprising the following steps: the electroporation parameter of on-site collection strip casting process；The various process parameters of on-site collection strip casting process and melt resolidified region；Finite element Three-Dimensional Dynamic casting model is established according to the division of unit grid；In conjunction with electromagnetic induction characteristic, melt solidification zone rheology and electromagnetic induction stirring are simulated；The electromagnetic agitation intensity under different casting-milling technology parameters is obtained, and simulates the temperature change difference for calculating rheology zone melt；Obtain the flowable critical solid rate of melt at freezing interface；Change the electroporation parameter of strip casting process；Simulation casting alloy rheological situation and electromagnetic induction distribution situation under pulse regulation；Application of the analogy method of the present invention in the aluminum alloy slab and its equipment and technical parameter optimization under different size, suitable for ultra-high-strength aluminum alloy melt current regulation strip casting process and meet the slab product of use condition.
Description
Technical field
The present invention relates to a kind of ultra-high-strength aluminum alloy pulse currents to regulate and control casting analogy method, more particularly to a kind of casting
Analogy method.
Background technique
The addition element of ultra-high-strength aluminum alloy is mainly formed with magnesium metal, zinc and copper and a small amount of chromium, manganese and titanium etc..Room
Warm intensity may be up to 600 ~ 800Mpa, be a kind of highest aluminium alloy of current intensity.The alloy is as aerospace, rail traffic
And common basic material in the medium-and-large-sized structural member lightweight in the fields such as motor vehicles for civilian use, it is widely used.Zinc and magnesium are main strong
Change element, copper plays supplement invigoration effect and improves anti-stress corrosiveness, and artificial aging strengthening effect can be improved in manganese and chromium.Thus close
The total content of gold element is up to 13% or more.As it can be seen that alloy system constituent element is more, component is high the features such as, cause its solidify temperature difference it is big and
The defects of easily generating segregation.When serious, there is organizational hierarchy, failure etc. in product.Control the diffusion of alloy elements of process of setting
And it is uniformly distributed, is to optimize product structure and improve its performance main means.
Routine casting-hot rolling cogging-hot continuous rolling process of ultra-high-strength aluminum alloy plate, there are high production cost, control it is difficult,
More disadvantages such as macrosegregation and environmental pollution；Conventional casting-rolling technology there are slab microstructure segregation, technical difficulty is larger the defects of etc..
Pulse current is thus introduced in strip casting process, can efficiently control and improve diffusion of alloy elements ability, thinning solidification structure
Improve slab mechanical performance with optimization.Since pulse current has the advantages such as hard oscillation, environmental protection, renewable, casting and rolling machine can be used as
Quantity-produced equipment appurtenance, so that the slab product of ultrahigh-strength aluminum alloy plays more important work in numerous technical fields
With.
Solid rate is that solid phase region is to judge alloy melt internal contraction in the accounting of total resolidified region in solid-liquid two-phase region
The index of fluid ability.It is generally acknowledged that strip casting process solid rate reaches 10% or more, melt does not have fluid ability when solidification shrinkage.
Under the action of electromagnetic agitation, melt flows ability is greatly improved, and diffusion is sufficiently and tissue is refined.Thus strong electromagnetism
Stirring can influence slab cross-section whole region.
Summary of the invention
The purpose of the present invention is to provide a kind of ultra-high-strength aluminum alloy pulse currents to regulate and control casting analogy method, and the present invention is
The analogy method of the electromagnetic induction of aluminium alloy melt strip casting process pulse current, aluminium alloy of the analogy method under different size
Slab and its equipment and technical parameter optimization in application, suitable for ultra-high-strength aluminum alloy melt current regulation strip casting process and
Meet the slab product of use condition.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of ultra-high-strength aluminum alloy pulse current regulation casting analogy method, the analogy method is the following steps are included: scene is received
Collect the electroporation parameter of strip casting process；The various process parameters of on-site collection strip casting process and melt resolidified region；It will coagulate
Gu area division unit grid；Various process parameters, which are based on, using finite element emulation software carries out three-dimensional finite element analysis, according to
Finite element Three-Dimensional Dynamic casting model is established in the division of unit grid；In conjunction with electromagnetic induction characteristic, melt solidification zone rheology is simulated
And electromagnetic induction stirring；The electromagnetic agitation intensity under different casting-milling technology parameters is obtained, and simulation calculates rheology region and melts
The temperature change difference of body；Obtain the flowable critical solid rate of melt at freezing interface；Change the electric pulse of strip casting process
Technical parameter；Simulation casting alloy rheological situation and electromagnetic induction distribution situation under pulse regulation；
By the casting-rolling method of above-mentioned finite element modelling electromagnetic induction, for the electromagnetic induction mould with different pulse current parameters
Critical solid rate situation of change is fitted, electric pulse parameter optimization is carried out；And thus improve the melt local flow of process of setting emotionally
Condition improves the diffusivity of alloying element, reduces segregation degree at slab different zones and improves slab core
The segregation defects in portion.
A kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, and the pulse regulates and controls casting characteristic packet
Include ultrahigh-strength aluminum alloy material characteristic, current distribution characteristic, electromagnetic induction distribution character and roll casting speed characteristic.
A kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, described by simulating obtained melt
Size of plate blank parameter determined by critical solid rate difference can be flowed；In this way, by adjusting pulse current pulse frequency
Rate, duty when pulse current intensity, can effectively control electromagnetic intensity and the distribution of melt process of setting；By adjusting
Roll casting speed, regulation melt hot-fluid become situation, cooperate electromagnetic agitation intensity, improve the flowable critical solid phase of solidification zone melt
Rate, and then diffusion of alloy elements ability is improved, reduce segregation defects.
A kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, and the pulse current introducing device is
The critical component of shaped aluminum alloy cast-rolled block size, pulse current waveform and current peak intensity for refining alloy tissue,
Homogenization alloying component and guarantee cast-rolled block quality and performance play the role of vital；Introducing device has round horizontal
Section and cylindrical body, the electromagnetism sense that the pulse current introducing device is obtained according to above-mentioned pulse electromagnetic casting analogy method
The distribution answered introduces position to determine.
A kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, and the strip casting process pulse, which introduces, closes
The device of golden melt solidification zone, wherein pulse current introducing device side surface is coated with boron nitride ceramics insulating film, the arteries and veins
Electric current introducing device core is rushed with arc angling.
A kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, the pulse current introducing device
Cross-sectional diameter 3mm.
A kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, and the method is applied to the strong aluminium of superelevation
Alloy cast-rolled block, according to above-mentioned pulse current introducing device and the optimal conditions of above-mentioned electromagnetism regulation casting simulation come at
Type.
The advantages and effects of the present invention are:
1. the present invention regulates and controls casting model by establishing 3 D electromagnetic, the cost of casting production physical varification is greatly reduced；
2. the present invention passes through the electric pulse of introducing suitable waveform and current strength, hence it is evident that improve inside high strength alumin ium alloy cast-rolled block
Quality and service performance are suitble to the use condition in above-mentioned each field as basic material；
3. the present invention improves the electromagnetic induction situation of melt process of setting by adjusting the material and shape of pulse introducing device.
Slab finished product is suitble to mass production；
4. the present invention is easily achieved, existing strip casting process is not influenced, can be widely applied to existing various aluminium alloys
The casting of material produces, and the processes such as heat treatment post-processing.
Detailed description of the invention
Fig. 1 is the top view of a kind of pulse current incorporation way and device according to the present invention；
Fig. 2 is the schematic diagram of a kind of pulse current incorporation way and device according to the present invention.
In figure: label 1 is roll cooling water；2 be Casting Roller；3 be casting panel products；4 be electrode；5 be Casting or rolling nozzle side seal；
6 be casting heat-insulating shield；7 be the pulse power；8 be aluminium alloy melt casting entrance；9 be melt settling vessel；10 be casting and rolling machine machine
Frame.
Specific embodiment
The present invention is described in detail for illustrated embodiment with reference to the accompanying drawing.
The present invention is improved for ultra-high-strength aluminum alloy cast-rolled block technology and product quality, improves plate blank molding solidification
Middle melt critical flow solid rate, and then improve segregation, thinning microstructure, the quality and performance for improving alloy product.
For this purpose, one aspect of the present invention, provides a kind of mould of the pulse current cast-rolled block of 7075 ultra-high-strength aluminum alloys
Quasi- method.Wherein the analogy method the following steps are included: on-site collection strip casting process electroporation parameter；On-site collection
The various process parameters of strip casting process and melt resolidified region；By resolidified region division unit grid；It is soft using finite element simulation
Part is based on various process parameters and carries out three-dimensional finite element analysis, establishes finite element Three-Dimensional Dynamic casting according to the division of unit grid
Model；In conjunction with electromagnetic induction characteristic, melt solidification zone rheology and electromagnetic induction stirring are simulated；Obtain different casting-milling technology parameters
Under electromagnetic agitation intensity, and simulate and calculate the temperature change difference of rheology zone melt；Obtain melt energy at freezing interface
The critical solid rate enough flowed；Change the electroporation parameter of strip casting process；Simulation casting alloy rheological under pulse regulation
Situation and electromagnetic induction distribution situation.
By the casting-rolling method of above-mentioned finite element modelling electromagnetic induction, for the electromagnetism sense with different pulse current parameters
It should simulate and critical solid rate situation of change, progress electric pulse parameter optimization.And hence improve the melt part of process of setting
Mobility status improves the diffusivity of alloying element, reduces segregation degree at slab different zones and improves
The segregation defects of slab core.
In the mode of certain optimal enforcements, the pulse regulation rolling casting technology characteristic includes ultrahigh-strength aluminum alloy material spy
Property, current distribution characteristic, electromagnetic induction distribution character and roll casting speed characteristic.It can be flowed by simulating obtained melt
Size of plate blank parameter determined by critical solid rate difference.In this way, by adjusting pulse current pulse frequency, duty ratio
And pulse current intensity, it can effectively control electromagnetic intensity and the distribution of melt process of setting；By adjusting roll casting speed,
Regulate and control melt hot-fluid and become situation, cooperate electromagnetic agitation intensity, improves the flowable critical solid rate of solidification zone melt, Jin Erti
High alloy elements diffusion ability reduces segregation defects.
Pulse current introducing device is the critical component of shaped aluminum alloy cast-rolled block size, pulse current waveform and electric current
Peak strength plays refining alloy tissue, homogenization alloying component and guarantee cast-rolled block quality and performance most important
Effect.
According to another aspect of the present invention, the device that a kind of pulse of strip casting process introduces alloy melt solidification zone is provided.Its
In, the introducing device has circular cross section and cylindrical body, and the pulse current introducing device is according to above-mentioned pulse electricity
The distribution for the electromagnetic induction that magnetic casting analogy method obtains introduces position to determine.
In certain preferred embodiments, pulse current introducing device side surface is coated with boron nitride ceramics insulating film,
The pulse current introducing device core has arc angling.It is preferred that the cross-sectional diameter of the pulse current introducing device
3mm。
According to another aspect of the present invention, the Casting Rolled Sheet under a kind of regulation of ultra-high-strength aluminum alloy pulse electromagnetic is additionally provided
Base, wherein the ultra-high-strength aluminum alloy cast-rolled block regulates and controls casting according to above-mentioned pulse current introducing device and above-mentioned electromagnetism
The optimal conditions of simulation are rolled to form.
For the electroporation parameter that optimization strip casting process casting introduces, slab microstructure segregation and coarse grains etc. is avoided to lack
It falls into, improves the quality and service performance of cast-rolled block product, the present invention provides a kind of casting models of pulse current regulation, use
To determine the parameter designing process of ultra-high-strength aluminum alloy cast-rolled block.In the pulse electromagnetic casting of ultra-high-strength aluminum alloy of the invention
In the analogy method of slab.The electroporation parameter of strip casting process is collected according to production scene；Be collected simultaneously strip casting process and
The various process parameters of melt resolidified region.Consider respectively ultrahigh-strength aluminum alloy material characteristic, electromagnetic induction and distribution character, with
And roll casting speed characteristic.Finite element three-dimensional pulse is established in influence of the division rule to casting result for solidification zone grid cell
Electric current casting model.In conjunction with electromagnetic induction characteristic, melt solidification zone rheology and electromagnetic agitation are simulated；And it simulates and calculates rheology region
The temperature change difference of melt；Obtain the flowable critical solid rate of melt at freezing interface；And with the modeling casting
The different electroporation parameters of process；To which it is solidifying to effectively improve alloy according to electromagnetic induction and distribution adjustment roll casting speed
Gu the diffusivity of process improves segregation.
Fig. 1 is the top view of a kind of pulse current incorporation way and device according to the present invention；Fig. 2 is according to the present invention
A kind of schematic diagram of pulse current incorporation way and device.In Fig. 1, label 1 is roll cooling water；2 be Casting Roller；3 be casting
Panel products；4 be electrode；5 be Casting or rolling nozzle side seal；6 be casting heat-insulating shield；7 be the pulse power；8 be aluminium alloy melt casting entrance.
In Fig. 2, label 1 is roll cooling water；2 be Casting Roller；3 be casting panel products；4 be electrode；6 be casting heat-insulating shield；7 be pulse
Power supply；8 be aluminium alloy melt casting entrance；9 be melt settling vessel；10 be casting and rolling machine rack.
Casting Roller 2, Casting or rolling nozzle side seal 5 and casting heat-insulating shield 6 are provided commonly for aluminium alloy melt rheoforging casting panel products
3, aluminium alloy melt is solidified first at 2 surface of Casting Roller by the cooling effect of Casting Roller cold-zone water 1, and solidification layer is fast at any time
Speed thickens until slab product 3 forms.According to the present invention, without changing existing casting and rolling device and casting process, pass through three-dimensional arteries and veins
Rush current regulation casting simulation as a result, Casting or rolling nozzle side seal 5, which is improved to the processing of side seal tip, through-hole and is inserted into electrode 4, directly connects
The electrode 4 at touching melt end slightly protrudes from 5 inner surface of side seal, and the electrode side surface is coated with BN insulating coating.The electrode 4
The other end is directly connected to the pulse power 7 by conducting wire.In the preferred embodiment, the wave for the pulse current that the pulse power 7 generates
Revolving speed of shape, current strength and the Casting Roller 2 etc. is variable process parameters.In this way, the present invention can be in existing casting
On the basis of milling equipment, it is only necessary to suitably adjust the casting-milling technology parameter, pulse needed for can introducing in strip casting process
Electric current generates strong electromagnetic oscillation effect in melt.And then the diffusivity of alloying element is improved, it reduces and is closed inside cast-rolled block
The degree of segregation of gold element, until eliminating segregation defects, refinement slab tissue.Therefore, pulse current incorporation way of the invention
Can be as needed, current parameters are adjusted flexibly, the ultrahigh-strength aluminum alloy of casting different size and the trade mark substantially increases casting
The quality and efficiency of product are rolled, casting cost is significantly saved.
The present invention regulates and controls casting model, the arteries and veins optimized in conjunction with electromagnetic induction distribution situation by establishing 3 D electromagnetic
Rush technical parameter and casting-milling technology parameter.And then existing casting and rolling installation is improved to improve alloy slab internal segregation defects, it mentions
The quality and performance of high alloy slab.The present invention greatly reduces the cost of casting production physical varification；It is easily achieved, to existing
Strip casting process do not influence, can be widely applied to existing various aluminum alloy materials casting production, and heat treatment after plus
The processes such as work.
The foregoing describe basic principle of the invention, technical characteristics and technical advantages.Spirit of that invention is not being departed from
Under the premise of range, those skilled in the art can make various changes and change to technical characteristic and embodiment disclosed above
Into, but both fall within protection scope of the present invention.The description of above embodiment is exemplary rather than restrictive, the present invention
Protection scope as required by right determine.
Claims (4)
1. a kind of ultra-high-strength aluminum alloy pulse current regulates and controls casting analogy method, which is characterized in that the analogy method include with
Lower step: the electroporation parameter of on-site collection strip casting process；The items of on-site collection strip casting process and melt resolidified region
Technological parameter；By resolidified region division unit grid；Being based on various process parameters progress three-dimensional using finite element emulation software has
Finite element analysis establishes finite element Three-Dimensional Dynamic casting model according to the division of unit grid；In conjunction with electromagnetic induction characteristic, simulation is molten
Body solidification zone rheology and electromagnetic induction stirring；The electromagnetic agitation intensity under different casting-milling technology parameters is obtained, and simulates calculating
The temperature change difference of rheology zone melt out；Obtain the flowable critical solid rate of melt at freezing interface；Change casting
The electroporation parameter of process；Simulation casting alloy rheological situation and electromagnetic induction distribution situation under pulse regulation；
By the casting-rolling method of above-mentioned finite element modelling electromagnetic induction, for the electromagnetic induction mould with different pulse current parameters
Critical solid rate situation of change is fitted, electric pulse parameter optimization is carried out；And thus improve the melt local flow of process of setting emotionally
Condition improves the diffusivity of alloying element, reduces segregation degree at slab different zones and improves slab core
The segregation defects in portion.
2. a kind of ultra-high-strength aluminum alloy pulse current according to claim 1 regulates and controls casting analogy method, which is characterized in that
Pulse regulation casting characteristic include ultrahigh-strength aluminum alloy material characteristic, current distribution characteristic, electromagnetic induction distribution character, with
And roll casting speed characteristic.
3. a kind of ultra-high-strength aluminum alloy pulse current according to claim 1 regulates and controls casting analogy method, which is characterized in that
It is described to flow size of plate blank parameter determined by critical solid rate difference by simulating obtained melt；In this way,
By adjusting pulse current pulse frequency, duty when pulse current intensity, the electromagnetism of melt process of setting can be effectively controlled
Induction and distribution；By adjusting roll casting speed, regulates and controls melt hot-fluid and become situation, cooperate electromagnetic agitation intensity, improve solidification
The flowable critical solid rate of area's melt, and then diffusion of alloy elements ability is improved, reduce segregation defects.
4. a kind of ultra-high-strength aluminum alloy pulse current according to claim 1 regulates and controls casting analogy method, which is characterized in that
The pulse current introducing device is the critical component of shaped aluminum alloy cast-rolled block size, pulse current waveform and current peak
Intensity is for refining alloy tissue, homogenization alloying component and guarantees that cast-rolled block quality and performance play vital work
With；Introducing device has circular cross section and cylindrical body, and the pulse current introducing device is cast according to above-mentioned pulse electromagnetic
The distribution for rolling the electromagnetic induction of analogy method acquisition introduces position to determine.
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Application publication date: 20190816 Assignee: Tiedong District Yangtong Material Business Department Assignor: SHENYANG University Contract record no.: X2023210000183 Denomination of invention: A Simulation Method for Pulse Current Controlled Casting and Rolling of Ultra High Strength Aluminum Alloy Granted publication date: 20230616 License type: Exclusive License Record date: 20231121 |
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