CN102642001A - Electromagnetic casting process for 5754 aluminum alloy - Google Patents
Electromagnetic casting process for 5754 aluminum alloy Download PDFInfo
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- CN102642001A CN102642001A CN2012101303337A CN201210130333A CN102642001A CN 102642001 A CN102642001 A CN 102642001A CN 2012101303337 A CN2012101303337 A CN 2012101303337A CN 201210130333 A CN201210130333 A CN 201210130333A CN 102642001 A CN102642001 A CN 102642001A
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Abstract
The invention discloses an electromagnetic casting process for 5754 aluminum alloy, which belongs to the field of aluminum alloy plate production and comprises the following steps: material preparation, material dosing, material adding, melting, stirring, slag removing, primary refining, sampling, component adjusting, carbon tetrachloride refining, beryllium adding, magnesium ingot adding, secondary refining, slag removing, furnace revolving, argon introducing and refining in a maintaining furnace, gas removing, filtering, cast rolling, reeling, cooling and packaging. The electromagnetic casting process has the advantages of effectively restraining turbulence and flow evenness in a cast rolling area of 5754 aluminum alloy melt in the cast rolling process due to a direct current magnetic filed, improving temperature distribution evenness of the 5754 aluminum alloy melt, disturbing solidified balance organization due to oscillation effect in the solidified process, improving content of alloy element in crystal and greatly improving quality of a cast rolling base.
Description
Technical field
The present invention relates to a kind of 5754 aluminium alloy electromagnetics casting compression technology, belong to the aluminum alloy plate materials production field.
Background technology
5754 alloys belong to the aluminum-magnesium series alloy, are the exemplary alloy in 5 line aluminium alloys.5754 aluminium alloys have middle high strength, and good corrosion resistance, good plasticity and workability ability are not heat-treatable strengthened.5754 sheet alloys of different conditions are mainly used in the making welding structural element, all are widely used at auto manufacturing, system jar industry and shipping industry.
With 5754 higher aluminum alloy blanks of casting mode production intensity, all have some technological difficulties aspect interior tissue, the component segregation: 5754 alloys are that crystallizing range is big with the difference of other aluminium alloy of common casting and roll process production, are 42 ℃.Exist casting district intercrystalline inhomogeneous when therefore adopting this alloy slab of casting and roll process production, cause slab tissue odds and component segregation.
5754 aluminium alloys dark technology raw edges and cold shut can occur in strip casting process; The aluminium cast strip that has raw edges and a cold shut is in further cold, finish rolling process; Constantly receive the effect of tension and compression stress, raw edges and crackle are constantly expanded, and occur broken belt when reaching certain degree.Therefore, reduce the raw edges and the cold shut of aluminium cast strip, the aluminium cast strip of producing no raw edges and cold shut has become aluminium sheet band enterprise problem demanding prompt solution.
Summary of the invention
Problem to above-mentioned prior art existence; The present invention provides a kind of 5754 aluminium alloy electromagnetics casting compression technology; One side is through the existence of D.C. magnetic field; Effectively suppress the turbulent flow phenomenon of 5754 aluminium alloy melts in the casting district and stream uniformity in the strip casting process, improved the uniformity of 5754 aluminium alloy melt Temperature Distribution; Secondly because the oscillation action in the process of setting has been upset the statenchyma of solidifying, improved the content of alloying element, increased substantially the quality of casting base at intracrystalline.
To achieve these goals; The technical scheme that the present invention adopts is: a kind of 5754 aluminium alloy electromagnetics casting compression technology; May further comprise the steps: logical argon gas refining → degasification → filtration → casting in the beryllium of getting the raw materials ready → prepare burden → feed in raw material → melt → stir → skim → initial refining → sampling → refining of composition adjustment → carbon tetrachloride → add → add magnesium ingot → double refining → skim → converter → holding furnace → batch → cool off → pack; Casting is the electromagnetic viscosimeter casting; Described electromagnetic viscosimeter casting may further comprise the steps: will carry out preheating to chute before the riser, temperature is removed the moisture in the chute more than 300 ℃;
Preheating roll before the riser, be 1 hour preheating time;
Start casting and rolling machine, casting and rolling machine speed is adjusted to 1200～1800mm/min;
After the current box temperature reaches setting value, roll casting speed is transferred to 400～600mm/min, the beginning ejecting plate is looked plate face quality and internal soundness situation adjustment roll casting speed, reaches as high as 900 mm/min;
Start lubricating system;
Start wire feed system;
Cut the defective part of made-up belt front end;
Cut wide three samples of 100mm, two are detected template, do the grain size analysis for one, carry out the template adjustment according to measurement result;
Start coiling machine, the curling tension force of adjustment normally batches;
Behind degasification tank, carry out the test and the sampling of hydrogen content and carry out chemical composition analysis.
The electric parameter of the special power supply of described electromagnetic viscosimeter casting requires:
1. the number of phases: three-phase, but also two-phase operation;
2. monophase current waveform: first-harmonic is sinusoidal wave, arbitrarily the superposition higher hamonic wave;
3. monophase current amplitude: 5～25A is independent adjustable;
4. monophase current fundamental frequency: 5～20hz is independent adjustable;
5. electromagnetic agitation commutating period: optional in 1～5 cycle;
6. phase difference: being 120 ° during three-phase operation, is 90 ° during two-phase operation;
7. accessory power supply: low-voltage, high-current 200～300A, amplitude is adjustable;
The major parameter in magnetic field requires:
1. magnetic field configuration: with the travelling-magnetic-field is the composite alternating magnetic field that main body contains impulsive magnetic field, in the casting district, produces oval magnetic potential along the roll axis direction;
2. magnetic field center frequency: 10 ± 1Hz is big or small with alloy kind and the dynamically adjusting of technological parameter do;
3. exciting current 10～12A.
Casting-milling technology parameter:
1. cooling water temperature: 28～32 ℃;
2. lip opening degree: 9.0mm;
3. casting roller gap: 4.7mm;
4. casting roll crown: 0.38mm, casting roll surface roughness: 0.8 μ m;
5. casting section length: 52～57mm
6. roll casting speed: 600～800mm/min
7. mouth roller gap: down: 0.5mm, on: 0.8mm
8. prestressing force: 8000KN
9. tension force: 65KN curls
The casting board size requires:
1. camber: 0～0.06mm;
2. limit portion raw edges :≤6mm;
3. poor with plate :≤0.08mm;
4. vertical thick poor :≤0.15mm;
Casting plate surface quality requires:
1～2 grade of grain size, hydrogen content≤0.18ml/100gAl.
The invention has the beneficial effects as follows: on the one hand through the existence of D.C. magnetic field, effectively suppress the turbulent flow phenomenon of 5754 aluminium alloy melts in the casting district and stream uniformity in the strip casting process, improved the uniformity of 5754 aluminium alloy melt Temperature Distribution; Secondly because the oscillation action in the process of setting has been upset the statenchyma of solidifying, improved the content of alloying element, increased substantially the quality of casting base at intracrystalline.
The specific embodiment
May further comprise the steps: logical argon gas refining → degasification → filtration → casting in the beryllium of getting the raw materials ready → prepare burden → feed in raw material → melt → stir → skim → initial refining → sampling → refining of composition adjustment → carbon tetrachloride → add → add magnesium ingot → double refining → skim → converter → holding furnace → batch → cool off → pack; It is characterized in that; Casting is the electromagnetic viscosimeter casting; Described electromagnetic viscosimeter casting may further comprise the steps: will carry out preheating to chute before the riser; Temperature is removed the moisture in the chute more than 300 ℃;
Preheating roll before the riser, be 1 hour preheating time;
Start casting and rolling machine, casting and rolling machine speed is adjusted to 1200～1800mm/min;
After the current box temperature reaches setting value, roll casting speed is transferred to 400～600mm/min, the beginning ejecting plate is looked plate face quality and internal soundness situation adjustment roll casting speed, reaches as high as 900 mm/min;
Start lubricating system;
Start wire feed system;
Cut the defective part of made-up belt front end;
Cut wide three samples of 100mm, two are detected template, do the grain size analysis for one, carry out the template adjustment according to measurement result;
Start coiling machine, the curling tension force of adjustment normally batches;
Behind degasification tank, carry out the test and the sampling of hydrogen content and carry out chemical composition analysis.
The electric parameter of the special power supply of electromagnetic viscosimeter casting requires:
1. the number of phases: three-phase, but also two-phase operation;
2. monophase current waveform: first-harmonic is sinusoidal wave, arbitrarily the superposition higher hamonic wave;
3. monophase current amplitude: 5～25A is independent adjustable;
4. monophase current fundamental frequency: 5～20hz is independent adjustable;
5. electromagnetic agitation commutating period: optional in 1～5 cycle;
6. phase difference: being 120 ° during three-phase operation, is 90 ° during two-phase operation;
7. accessory power supply: low-voltage, high-current 200～300A, amplitude is adjustable;
The major parameter in magnetic field requires:
1. magnetic field configuration: with the travelling-magnetic-field is the composite alternating magnetic field that main body contains impulsive magnetic field, in the casting district, produces oval magnetic potential along the roll axis direction;
2. magnetic field center frequency: 10 ± 1Hz is big or small with alloy kind and the dynamically adjusting of technological parameter do;
3. exciting current 10～12A.
Casting-milling technology parameter:
1. cooling water temperature: 28～32 ℃;
2. lip opening degree: 9.0mm;
3. casting roller gap: 4.7mm;
4. casting roll crown: 0.38mm, casting roll surface roughness: 0.8 μ m;
5. casting section length: 52～57mm
6. roll casting speed: 600～800mm/min
7. mouth roller gap: down: 0.5mm, on: 0.8mm
8. prestressing force: 8000KN
9. tension force: 65KN curls
The casting board size requires:
1. camber: 0～0.06mm;
2. limit portion raw edges :≤6mm;
3. poor with plate :≤0.08mm;
4. vertical thick poor :≤0.15mm;
Casting plate surface quality requires: 1～2 grade of grain size, hydrogen content≤0.18ml/100gAl.
Get the raw materials ready: the raw material of use must clean, dry, do not have fouls such as oily, anhydrous; Waste material allows to use 5052,5754 and 1 to be alloyed scrap;
Reinforced: calculate the good various intermediate alloys of adding and the addition of former alloy addition of needing by 5754 chemical composition requirements, the addition of magnesium ingot is by upper limit control;
Alloying element adds computing formula: the aluminium water yield in alloy addition addition=stove * desired value ÷ alloy addition content value ÷ practical efficiency.
At first waste material, intermediate alloy ingot, alloy addition, aluminium ingot are added in the stove and (do not add magnesium ingot this moment), pour into aluminium liquid then; When the solid material all melts, carry out beginning to add beryllium, magnesium ingot after the refining second time, must use specific purpose tool when adding magnesium ingot, the cage that magnesium ingot is housed is pressed in the aluminium liquid slowly drags, till fusing fully, reduce the scaling loss of magnesium.The reinforced thermal loss that will rapidly, as far as possible reduce in the stove.
Melt treatment: when furnace charge is softening stay after, should in time in stove, evenly be sprinkled into the layer of aluminum magnesium alloy covering agent, the consumption of coverture is specifically confirmed with reference to producer's description of product.After furnace chargeization is flat, carry out twice stirring, stir once at a distance from 30 minutes.When aluminium coolant-temperature gage in the stove reaches 750 ℃ ~ 760 ℃ left and right sides, carry out logical argon injection refining (common refining agent) first time, skim, take a sample.According to the sampling result first time, carry out the composition adjustment, carry out refining with carbon tetrachloride, add beryllium, magnesium ingot (when adding magnesium ingot, carry out) then according to the adding method of aforementioned magnesium ingot, stir after 30 minutes, carry out the refining second time then, skim, take a sample.
After adding magnesium ingot, should in stove, evenly be sprinkled into slagging agent (consumption of slagging agent is with reference to specification) in preceding 5 minutes that skim, then slag taken off stove gate and stop slightly, treat to skim after slag aluminium separates fully.
Refining treatment method for the second time: logical argon injection refining (must be the almag refining agent; The sodium removing agent of adding 25%), the consumption of refining agent is a 2kg/t aluminium, and refining time is more than 15 minutes; In the stove dead angle can not be arranged during refining; All the refining of aluminium liquid puts in place, and the wave height that starts during refining is between 50～100mm, and the intact aluminium liquid of refining stopped after 10 minutes skims.
Converter: after the composition of taking a sample is for the second time confirmed, when temperature of aluminum liquid reaches 750～760 ℃, carry out converter.Must accomplish that composition is qualified half an hour before the converter, and temperature is suitable, and refining is thorough, and it is clean to skim.
Logical argon refining: lead to the argon refining leaving standstill stove after the converter, refining time is 10 minutes, and refining is taken surface scum off after finishing, and leaves standstill furnace temperature and is controlled at 730～740 ℃.
Online dehydrogenation is handled: the refining of online employing argon gas, add 5% chlorine under the situation of condition permission, and note the emission treatment of chlorine, reduce the pollution of chlorine to environment.The temperature of degasification tank remains on 730～740 ℃ during online degasification, and the hydrogen content after the degasification in the melt is controlled at below the 0.15ml/100g aluminium.Degasification tank was skimmed once in per 2 hours.
Filter: online employing 30PPI and 60PPI two-stage ceramic filter plate filter.
The rotten processing: alterant adopts aluminium titanium carbon grain fining agent, point of addition be behind the Rose Box before before the case, addition is a 2kg/ ton aluminium.Can change into aluminium titanium boron (this decision is formulated by scientific and technological research institute research staff) according to field trial situation alterant.
Preceding oven temperature, degree is controlled at 715～725 ℃, and liquid surface height controlling is at 18～20mm.
In the electromagnetism continuously-casting system, the electric parameter of casting special power supply required be: (1) number of phases: three-phase, but also two-phase operation; (2) monophase current waveform: first-harmonic is sinusoidal wave, arbitrarily the superposition higher hamonic wave; (3) monophase current amplitude: 5～25A, independent adjustable; (4) monophase current fundamental frequency: 5～20hz, independent adjustable; (5) electromagnetic agitation commutating period: optional in 1～5 cycle; (6) phase difference: be 120 ° during three-phase operation, be 90 ° of (7) accessory power supplys during two-phase operation: low-voltage, high-current 200～300A, amplitude is adjustable.
The major parameter in magnetic field requires:
Magnetic field configuration: with the travelling-magnetic-field is the composite alternating magnetic field that main body contains impulsive magnetic field, in the casting district, produces oval magnetic potential along the roll axis direction;
Magnetic field center frequency: 10 ± 1Hz.Size is done dynamically to regulate with alloy kind and technological parameter;
Exciting current 10～12A.
Casting-milling technology parameter:
Cooling water temperature: 28～32 ℃;
Lip opening degree: 9.0mm;
Casting roller gap: 4.7mm;
Casting roll crown: 0.38mm, casting roll surface roughness: 0.8 μ m;
Casting section length: 52～57mm;
Roll casting speed: 600～800mm/min (can suitably adjust) according to field condition;
Mouth roller gap: down: 0.5mm, on: 0.8mm;
Prestressing force: 8000KN;
Tension force: 65KN (adjusting according to the field trial situation) curls.
Casting plate quality requirement:
(1) dimensional requirement:
Camber: 0～0.06mm;
Limit portion raw edges :≤6mm;
Poor with plate :≤0.08mm;
Vertical thick poor :≤0.15mm (in the roll girth).
(2) surface quality requires:
The defective that other influences such as the surface does not allow secret note, the torrid zone, the limit of collapsing, band, air flue, burn into roll surface segmentation crack are used.
1～2 grade of grain size, hydrogen content≤0.18ml/100gAl.
(3) casting production requirement:
Will carry out preheating to chute before the riser, temperature is removed the moisture in the chute more than 300 ℃;
Preheating roll before the riser, be 1 hour preheating time;
Start casting and rolling machine, casting and rolling machine speed is adjusted to 1200～1800mm/min;
After the current box temperature reaches setting value, roll casting speed is transferred to 400～600mm/min, the beginning ejecting plate is looked plate face quality and internal soundness situation adjustment roll casting speed, reaches as high as 900 mm/min.
Start lubricating system;
Start wire feed system;
Cut the defective part of made-up belt front end;
Cut wide three samples of 100mm, two are detected template, do the grain size analysis for one, carry out the template adjustment according to measurement result;
Start coiling machine, the curling tension force of adjustment normally batches;
Behind degasification tank, carry out the test and the sampling of hydrogen content and carry out chemical composition analysis.
Claims (6)
1. an aluminium alloy electromagnetic is cast compression technology; May further comprise the steps: logical argon gas refining → degasification → filtration → casting in the beryllium of getting the raw materials ready → prepare burden → feed in raw material → melt → stir → skim → initial refining → sampling → refining of composition adjustment → carbon tetrachloride → add → add magnesium ingot → double refining → skim → converter → holding furnace → batch → cool off → pack; It is characterized in that; Casting is the electromagnetic viscosimeter casting; Described electromagnetic viscosimeter casting may further comprise the steps: will carry out preheating to chute before the riser, temperature is removed the moisture in the chute more than 300 ℃;
Preheating roll before the riser, be 1 hour preheating time;
Start casting and rolling machine, casting and rolling machine speed is adjusted to 1200～1800mm/min;
After the current box temperature reaches setting value, roll casting speed is transferred to 400～600mm/min, the beginning ejecting plate;
Start lubricating system;
Start wire feed system;
Cut the defective part of made-up belt front end;
Cut wide three samples of 100mm, two are detected template, do the grain size analysis for one;
Start coiling machine, the curling tension force of adjustment normally batches;
Behind degasification tank, carry out the test and the sampling of hydrogen content and carry out chemical composition analysis.
2. a kind of 5754 aluminium alloy electromagnetics casting compression technology according to claim 1, the electric parameter of the special power supply of described electromagnetic viscosimeter casting require:
1. the number of phases: three-phase, but also two-phase operation;
2. monophase current waveform: first-harmonic is sinusoidal wave, arbitrarily the superposition higher hamonic wave;
3. monophase current amplitude: 5～25A is independent adjustable;
4. monophase current fundamental frequency: 5～20hz is independent adjustable;
5. electromagnetic agitation commutating period: optional in 1～5 cycle;
6. phase difference: being 120 ° during three-phase operation, is 90 ° during two-phase operation;
7. accessory power supply: low-voltage, high-current 200～300A, amplitude is adjustable.
3. a kind of 5754 aluminium alloy electromagnetics casting compression technology according to claim 1, the major parameter in magnetic field requires:
1. magnetic field configuration: with the travelling-magnetic-field is the composite alternating magnetic field that main body contains impulsive magnetic field, in the casting district, produces oval magnetic potential along the roll axis direction;
2. magnetic field center frequency: 10 ± 1Hz is big or small with alloy kind and the dynamically adjusting of technological parameter do;
3. exciting current 10～12A.
4. a kind of 5754 aluminium alloy electromagnetics casting compression technology according to claim 1, casting-milling technology parameter:
1. cooling water temperature: 28～32 ℃;
2. lip opening degree: 9.0mm;
3. casting roller gap: 4.7mm;
4. casting roll crown: 0.38mm, casting roll surface roughness: 0.8 μ m;
5. casting section length: 52～57mm;
6. roll casting speed: 600～800mm/min;
7. mouth roller gap: down: 0.5mm, on: 0.8mm;
8. prestressing force: 8000KN
9. tension force: 65KN curls.
5. a kind of 5754 aluminium alloy electromagnetics casting compression technology according to claim 1, the casting board size requires:
1. camber: 0～0.06mm;
2. limit portion raw edges :≤6mm;
3. poor with plate :≤0.08mm;
4. vertical thick poor :≤0.15mm.
6. according to claim 1 described a kind of 5754 aluminium alloy electromagnetics casting compression technology, casting plate surface quality requires: 1～2 grade of grain size, hydrogen content≤0.18ml/100gAl.
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| CN2012101303337A CN102642001A (en) | 2012-04-28 | 2012-04-28 | Electromagnetic casting process for 5754 aluminum alloy |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111590A (en) * | 2013-03-05 | 2013-05-22 | 山东信通铝业有限公司 | Casting-rolling method for aluminum alloy plate |
| CN104152731A (en) * | 2014-07-10 | 2014-11-19 | 陕西国德电气制造有限公司 | Process for melting cast aluminum alloy |
| CN104148601A (en) * | 2014-08-26 | 2014-11-19 | 青海桥头铝电股份有限公司 | Super-thick aluminum alloy cast-rolled plate production method |
| CN108339963A (en) * | 2018-03-29 | 2018-07-31 | 东北大学 | A kind of difference phase travelling-magnetic-field electromagnetic casting method |
| CN111394602A (en) * | 2020-04-24 | 2020-07-10 | 江苏科技大学 | High-quality aluminum alloy and preparation method thereof |
| CN114807650A (en) * | 2022-04-20 | 2022-07-29 | 河南中孚高精铝材有限公司 | Production process for adding UBC (UBC-based scrap) recycled materials in smelting of aluminum alloy tank materials |
| CN115961162A (en) * | 2022-12-28 | 2023-04-14 | 重庆铝道科技有限公司 | 5052 alloy blank short-process production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103111590A (en) * | 2013-03-05 | 2013-05-22 | 山东信通铝业有限公司 | Casting-rolling method for aluminum alloy plate |
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| CN108339963B (en) * | 2018-03-29 | 2019-07-30 | 东北大学 | A kind of difference phase travelling-magnetic-field electromagnetic casting method |
| CN111394602A (en) * | 2020-04-24 | 2020-07-10 | 江苏科技大学 | High-quality aluminum alloy and preparation method thereof |
| CN111394602B (en) * | 2020-04-24 | 2021-10-29 | 江苏科技大学 | High-quality aluminum alloy and preparation method thereof |
| CN114807650A (en) * | 2022-04-20 | 2022-07-29 | 河南中孚高精铝材有限公司 | Production process for adding UBC (UBC-based scrap) recycled materials in smelting of aluminum alloy tank materials |
| CN114807650B (en) * | 2022-04-20 | 2022-10-11 | 河南中孚高精铝材有限公司 | Production process for adding UBC (UBC-based scrap recovery) in smelting of aluminum alloy tank material |
| CN115961162A (en) * | 2022-12-28 | 2023-04-14 | 重庆铝道科技有限公司 | 5052 alloy blank short-process production method |
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Application publication date: 20120822 |