CN110238229A - A kind of manufacturing method of aluminum alloy plate materials - Google Patents
A kind of manufacturing method of aluminum alloy plate materials Download PDFInfo
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- CN110238229A CN110238229A CN201910607163.9A CN201910607163A CN110238229A CN 110238229 A CN110238229 A CN 110238229A CN 201910607163 A CN201910607163 A CN 201910607163A CN 110238229 A CN110238229 A CN 110238229A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 title claims abstract description 11
- 238000005097 cold rolling Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 16
- 238000005098 hot rolling Methods 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 238000000137 annealing Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 239000006104 solid solution Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 12
- 238000002360 preparation method Methods 0.000 abstract description 5
- 229910021365 Al-Mg-Si alloy Inorganic materials 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 14
- 239000000956 alloy Substances 0.000 description 13
- 239000011777 magnesium Substances 0.000 description 13
- 229910045601 alloy Inorganic materials 0.000 description 10
- 238000005275 alloying Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000013078 crystal Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 229910019064 Mg-Si Inorganic materials 0.000 description 5
- 229910019406 Mg—Si Inorganic materials 0.000 description 5
- 239000000470 constituent Substances 0.000 description 5
- 238000005204 segregation Methods 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 238000003483 aging Methods 0.000 description 4
- 229910019752 Mg2Si Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910018131 Al-Mn Inorganic materials 0.000 description 1
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 1
- 229910018461 Al—Mn Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000013036 cure process Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
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- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The present invention provides a kind of aluminum alloy plate materials and its manufacturing method based on Al-Mg-Si alloy.Compared with existing Al-Mg-Si-type aluminum alloy plate preparation method, the plate that the Al-Mg-Si-type aluminum alloy plate preparation method in the present invention is prepared has had both excellent intensity and formability, while also having excellent room-temperature aging rejection.
Description
Technical field
The present invention relates to the technical fields of alloy, and in particular to a kind of aluminum alloy plate materials and its manufacturing method, especially one
Aluminum alloy plate materials and its manufacturing method of the kind based on Al-Mg-Si alloy.
Background technique
In recent years, since people are for the pay attention to day by day of the environmental protection problems such as exhaust gas discharge, and can not be again to reducing
The continuous demand of raw energy consumption, also proposed increasingly higher demands for the car body lightweight of the means of transports such as motor vehicle.
And in the building material for including the body of motor vehicle such as bonnet, car door, roof, lighter (the about dense steel plate of quality
The 1/3 of degree) forming property and the excellent aluminum alloy materials of baking and hardening performance use it is swift and violent increase, gradually instead of it is previous
Directly lead steel to be used.
In existing numerous aluminum alloy materials, 6000 line aluminium alloys (i.e. JIS6000 line aluminium alloy, Al-Mg-Si class) with
Magnesium and silicon are necessary alloying element, by the way that Mg is precipitated2Si has small density, specific strength and specific stiffness as main hardening constituent
The advantages that height, good impact resistance, corrosion resistance are high and thermal diffusivity is good, the aluminium alloy plate being prepared be especially suited as thin-walled and
The motor vehicle body construction material high to intensity requirement is at present in the most widely used aluminium alloy of automotive field.Meanwhile
The waste material of 6000 line aluminium alloy products is easy to obtain again after melting during recycling, since alloying element is few
6000 line aluminium alloy material ingot bars, cycling and reutilization are also splendid.
It above-mentioned excellent performance and is widely applied although 6000 line aluminium alloys have, still has and some it is to be difficult to
Satisfied defect: although for example, the high ductility of 6000 line aluminium alloy tensile strength of conventional High Intensity is insufficient, bending etc. adds
The problem of working hour is easy to produce crackle or even cracks；For example, the difference of the cross sectional shape of the aluminium alloy based on extrusion molding, thickness etc.
It is different, cause the cooling velocity at each position in section to generate uneven and deform, so that accuracy to size is deteriorated and aluminium alloy
Sheet become difficult, etc..
Wide application prospect and existing above-mentioned problems just because of 6000 line aluminium alloys, people are directed to 6000
Line aluminium alloy has carried out a large amount of research, to develop a kind of more excellent Al-Mg-Si-type aluminum alloy of comprehensive performance.
Summary of the invention
The purpose of the present invention is to provide a kind of Al-Mg-Si-type aluminum alloy of excellent combination property and its manufacturing method, from
And the shortcomings that overcoming the prior art and deficiency.
To achieve the above object, the present invention provides a kind of manufacturing method of Al-Mg-Si-type aluminum alloy plate, features
It is that the manufacturing method includes the following steps:
1) raw metal of Al-Mg-Si-type aluminum alloy is provided；
2) by raw metal heating melting, and fused raw material is poured by double-roller rolling equipment；
3) homogenize process is carried out to the plate after casting；
4) hot rolling, reduction ratio >=80% are carried out to the plate after homogenize process；
5) just cold rolling, reduction ratio >=30% are carried out to the plate after hot rolling；
6) it anneals to the plate after first cold rolling；
7) to annealing or plate carry out whole cold rolling so that total reduction >=60% after cold rolling twice；
8) it is heat-treated again after carrying out solution treatment to the plate of whole cold rolling；
9) tension straingtening is carried out to the plate after heat treatment.
Preferably, the heating melting refers to, heats the raw material to 30-50 DEG C of liquidus temperature；The double roller is hollow
Copper roller；In casting, the double roller opposite direction rotating, rotating peripheral speed is 50-100m/ points, while applying 1.5-2.0kN/mm to double roller
Pressure.
Preferably, the homogenize process refers to, keeps the temperature 10- after the plate after casting is heated to 480-520 DEG C of temperature
After 20 hours, 320 DEG C or less are cooled to 100-150 DEG C/h of cooling velocity.
Preferably, the hot rolling refers to, 400-450 DEG C of start rolling temperature.
Preferably, it is described annealing refer to, after keeping the temperature 1-3 hours after the plate after first cold rolling is heated to 450-500 DEG C with
Furnace is cooling.
Preferably, the solution treatment refers to, the plate after whole cold rolling is heated to 520-550 DEG C of solid solution temperature
Afterwards, 4-6 hours are kept the temperature；After plate is then chilled to 165-180 DEG C, then 1-2 hours are kept the temperature, is air-cooled to room temperature.At the heat
Reason refers to, after plate is heated to 100-120 DEG C, heat preservation was air-cooled to room temperature after 5-10 hours.
Preferably, the tension straingtening refers to, plate is applied in tension straingtening equipment to generate the drawing of 0.2-0.5%
Stretching strain, then 150-160 DEG C at a temperature of keep the temperature 0.5-1 hours.
Preferably, in the Al-Mg-Si-type aluminum alloy, containing being calculated with mass percentage, 1-1.5%Mg, 3.5-
4%Si, 0.3-0.5%Cu, 0.4-1.0%Fe, 0.05-0.2%Mn, 0.2-0.3%Li, surplus be Al and inevitably it is miscellaneous
Matter.
Al-Mg-Si-type aluminum alloy plate compared with existing Al-Mg-Si-type aluminum alloy plate preparation method, in the present invention
The plate that preparation method is prepared has had both excellent intensity and formability, while also having excellent room-temperature aging inhibition
Energy.
Specific embodiment
Embodiment 1
The Al-Mg-Si-type aluminum alloy plate of excellent combination property in the present invention is prepared via a method which:
Firstly, calculated according to mass percentage, with 1.5%Mg, 4.0%Si, 0.5%Cu, 0.9%Fe, 0.20%Mn,
0.25%Li is heated the raw material to after surplus weighs each raw material for the ratio of Al and inevitable impurity and is compared liquidus curve
High 40 DEG C of temperature to obtain molten metal bath, due to containing the light-alloys element such as more silicon and magnesium in the present invention, in heating melting
It is sufficiently stirred in the process to obtain uniformly mixed molten metal.
Then, by pouring metal melt to double-roller rolling equipment, liquid level is higher by cast gate 30mm, to guarantee to generate enough static pressure
To the state of die casting melt between stabilizing roller, wherein double-roller rolling equipment is hollow copper roller, and hollow interior is connected with coolant liquid
Body, to guarantee that molten metal is chilled to 650 DEG C hereinafter, why to guarantee in this way with the speed of 200 DEG C/s or more from melting temperature
Chilling speed, be because ultra-fine intermetallic compound can be obtained, so as to effectively improve the high temperature of aluminum alloy plate materials
Intensity.Meanwhile driving double roller with 70m/ points of rotation peripheral speed opposite direction rotating, and apply opposite pressure 1.8kN/mm to copper roller respectively
(kN/mm indicates the pressure for being applied to copper roller divided by the thickness of copper roller), if roller speed, which does not reach requirement, is easy to cause casting process
The increase loaded of middle double roller and the fluctuation of melt solidified layer thickness, but roller speed can not be too high, too it is high be easy to cause it is molten
Body contacts uneven with roll surface, and applying certain opposite pressure can cooperate roller speed to rotate, to keep the shape in solidification portion
Stablize, but pressure is excessive, will lead to the roughening of roll surface and then influences the smooth of steel slab surface.
Then, homogenize process is carried out to slab, heat preservation 15 is small after the plate after casting is specifically heated to 500 DEG C of temperature
Shi Hou is cooled to 320 DEG C or less with 130 DEG C/h of cooling velocity.The temperature of homogenize process must assure that in block
Alloying element is uniform, eliminates segregation, and makes Mg2Si can be sufficiently dissolved.Meanwhile why must assure that enough cooling speed
Degree, be prevent the compound of Mg-Si in cooling procedure generate be precipitated, agglutination, to influence subsequent deep drawn performance and low
The performances such as warm baking hardening.The homogenize process time will also be guaranteed, to guarantee the second phase particles for causing formability to deteriorate
Abundant solid solution, but too long homogenize process effect saturation and cause productive low and cost increase.
Then, the start rolling temperature at 420 DEG C carries out hot rolling treatment, hot rolling reduction ratio 90%.Start rolling temperature is too low so that plate
Material resistance of deformation is excessively high and is difficult to effective hot rolling, and the compound that will lead to Mg-Si generates and is precipitated, is aggregated, to influence subsequent
Deep drawn performance and low-temperature bake hardening etc. performances.But start rolling temperature can not be excessively high, otherwise can make course of hot rolling
Middle grain coarsening.The too low meeting of hot rolling reduction ratio is so that the generation of Cube orientation is insufficient, and then influences the formabilities such as crimping processing
Energy.Hot rolling reduction ratio can not be excessively high, need to guarantee enough thickness after plate hot rolling, with there are enough pressures of subsequent cold rolling
Space.
Then, just cold rolling is carried out, the reduction ratio of first cold rolling is 40%.The first too low whole cold rolling that will lead to after annealing of cold rolling
The excessive generation that lower rate is excessive and Cube is caused to be orientated, and then lead to the generation of plate anisotropy, lead to deep drawn reduced performance.
Then, made annealing treatment, keep the temperature 2 hours after the plate after first cold rolling is specifically heated to 480 DEG C, then with
Furnace is cooling.The temperature of annealing must assure that abundant recrystallization, but can not be excessively high, thick to prevent crystal grain during retaining fire
Change and the formabilities such as crimping processing is caused to be deteriorated.
Then, whole cold rolling is carried out, after whole cold rolling, the total reduction of cold rolling twice is 65%.Cold rolling total reduction it is enough
It can guarantee the abundant generation of Cube orientation greatly.But total reduction also should not be too large, such as more than 70%, it will cause each to different
The problem of property.
After whole cold rolling, solution treatment is carried out to plate, the plate after cold rolling is specifically heated to 530 DEG C of solution treatment
After temperature, 5 hours are kept the temperature, solid solution temperature is too low or soaking time is insufficient, all solution treatment can be caused insufficient, but such as
Fruit temperature is excessively high to may result in the problems such as eutectic dissolves；After plate merging salt bath equipment is then chilled to 170 DEG C, then keep the temperature
1.5 hours, it is air-cooled to room temperature, by being chilled to the temperature lower than solution treatment, solid solution element in parent phase is enabled to be in
Saturation state, to promote that Mg can be formed in the subsequent aging strengthening model stage2Chemical combination among the Mg-Si of the beneficial hardening constituent of Si class
The formation of object relatively can inhibit other harmful Mg-Si intermetallic compounds to generate naturally.Then carry out at timeliness heat again
Reason, after plate is specifically heated to 110 DEG C, heat preservation was air-cooled to room temperature after 7 hours, and aging temp is too low or the time is too short
Words, will lead to solid solution element cannot sufficiently be precipitated to form Mg2Si so that strength reduction, and temperature is excessively high or the time too long then
It will lead to extension property deficiency.
Finally, applying 0.3% elongation strain in tension straingtening equipment to the plate after aging strengthening model, then exist
0.8 hour is kept the temperature at a temperature of 150 DEG C.The elongation strain is generated, can be effective against caused by subsequent natrual ageing and bend
It takes the raising of intensity and improves the forming property of plate, but the elongation strain should not be too large, otherwise since elongation strain can be led
Becoming larger for intensity is caused to influence the forming property of plate instead.
In embodiment 2, copper roller revolution speed is adjusted to 200m/ points, opposite pressure is applied to copper roller and is adjusted to 1.0kN/
Mm, the conditions such as remaining processing step, parameter are same as Example 1；And in embodiment 3, cooling velocity that molten metal is started
It is adjusted to 100 DEG C/s, the conditions such as remaining processing step, parameter are same as Example 1.
In embodiment 4, homogenize process temperature is set as 480 DEG C, soaking time is set as 20 hours, remaining technique step
Suddenly, the conditions such as parameter are same as Example 1；In embodiment 5, it is cooled to after homogenize process with 80 DEG C/h of cooling velocity
320 DEG C hereinafter, the conditions such as remaining processing step, parameter are same as Example 1.
In embodiment 6, start rolling temperature is adjusted to 400 DEG C, the conditions such as remaining processing step, parameter with 1 phase of embodiment
Together；In embodiment 7, hot rolling reduction ratio is 70%, and the conditions such as remaining processing step, parameter are same as Example 1.
In embodiment 8, annealing temperature is set as 530 DEG C, the conditions such as remaining processing step, parameter with 1 phase of embodiment
Together.
In embodiment 9, the total reduction of cold rolling is adjusted to 75%, the conditions such as remaining processing step, parameter with implementation
Example 1 is identical.
In embodiment 10, the plate after directly keeping the temperature solution treatment be air-cooled to room temperature and without salt bath chilling heat preservation at
Reason, the conditions such as remaining processing step, parameter are same as Example 1.In embodiment 11, aging heat treatment temperature is set as
90 DEG C, the conditions such as remaining processing step, parameter are same as Example 1.
In embodiment 12, the elongation strain that tension straingtening generates is set as 0.7%, the items such as remaining processing step, parameter
Part is same as Example 1.
The performance of the Al-Mg-Si-type aluminum alloy plate of the present invention of table 1
Mechanical properties, elongation percentage, stamping formabilily and room temperature have been carried out to the aluminum alloy plate materials of embodiment 1-12
The test of aging performance.Wherein, mechanical properties, elongation percentage are measured according to national standard；Forming property is thick using 1mm
The plate of 200mm square carries out punching press with the column needle set of φ 100mm under the pressure of 450kN, the height gone out when plate fracture
Degree is as judging, and numerical value is bigger, and forming property is better；Room-temperature aging performance is to be placed at room temperature for measure after 180 days 0.2% surrender
For the difference of 0.2% yield strength directly measured after intensity and preparation as judging, numerical value is smaller, shows by enough for a long time
Room temperature natrual ageing after, the value added of yield strength is smaller, thus inhibit room temperature natrual ageing performance it is better.It tests
The performance parameter arrived is referring specifically to table 1.
Al-Mg-Si-type aluminum alloy used by aluminum alloy plate materials in the present invention, mainly there is Si, Mg, Cu, Fe, Mn, Li et al.
Alloying element composition.
Wherein, silicon addition and Mg are the main alloy elements of Al-Mg-Si-type aluminum alloy, are capable of forming β phase
Mg-Si compound Mg2Si, thus by being heat-treated effectively precipitation and playing invigoration effect to alloy, meanwhile, it is formed in Si and Mg
Mg2Remaining Si solid solution is finally precipitated again in the base after Si, further invigoration effect can be played to aluminium alloy, for reality
Enough β phases cannot be precipitated in existing above-mentioned effect, the content of Si very little, at the same will lead to subsequent baking and hardening performance it is significant under
Drop, extension are also deteriorated, and suitable Si can increase fluidity of molten to improve the casting character of alloy melt；But Si's contains
Amount can not be excessively high, the coarsening that cyrystal boundary segregation and crystal grain otherwise can be made to be precipitated, so that ductility and forming property
It is deteriorated, meanwhile, the uniformity that excessive Si content will lead to melt alloy distribution is difficult to realize.
As described above, alloying element Mg mainly forms hardening constituent with Si, in order to obtain enough hardening constituents, the content of Mg
It cannot be too low；But if the too high levels of Mg, it will be unable to obtain extra Si and be formed by additional strengthening effect, while Mg contains
It measures the excessively high component segregation for also easily causing alloy melt and influences casting effect and properties of product.
Alloying element cu can form compound with Si assortment, to avoid embrittlement caused by the cyrystal boundary segregation of Si, in turn
Promote the intensity and baking and hardening performance of alloy, moreover it is possible to improve the corrosion resistance and high temperature resistance of alloy；But the content of Cu
Also unsuitable excessively high, it otherwise will lead to the deterioration such as corrosion resistance instead.
Alloying element Fe can play the role of solution strengthening, while Fe can play crystal grain refinement, to mention
The mechanical performances such as the tensile strength of high alloy, and the increase of the crystal grain quantity as caused by crystal grain refinement, can effectively inhibit
Extra Si is caused by the segregation of crystal boundary the problems such as embrittlement of grain boundaries, and in order to play above-mentioned effect, the content of Fe cannot be too low；
But since Fe is easy to generate intermetallic compound with Al to reduce the plastic deformation ability of aluminium alloy, content is also unsuitable
It is excessively high.
Alloying element Mn has certain solution strengthening effect, simultaneously because being capable of forming Al-Mn dispersed particle and playing
Inhibit grain coarsening, to achieve the purpose that crystal grain refinement；The spherical precipitation that can also promote Fe-Al compound simultaneously, to keep away
Exempt from the adverse effect that Fe-Al compound generates processing moulding；But the content of Mn is also unsuitable excessive, otherwise can cause instead thick
The precipitation of big crystal and then the deterioration for leading to processing performance, and excessive Mn can also make melt solidus temperature increase,
So that casting temperature increases and increases production cost and reduce production efficiency.
Alloying element Li can be during cure process be roasted in coating, hence it is evident that promotes β " to be mutually precipitated, thus subsequent
It is changed into stable Mg in Natural Aging Process2Si hardening constituent, therefore the addition of Li can significantly reduce coating barbecue hardening
Treatment temperature and the performance of age-hardening, in order to play above-mentioned rental, the additive amount of Li cannot be too low；But the additive amount of Li
Can not be excessively high, the excessively high elongation percentage that will lead to alloy and forming property decline, and melt can be made to have apparent ingredient inclined
Analyse and influence the performance of cast article.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (8)
1. a kind of manufacturing method of Al-Mg-Si-type aluminum alloy plate, it is characterised in that the manufacturing method includes the following steps:
1) raw metal of Al-Mg-Si-type aluminum alloy is provided；
2) by raw metal heating melting, and fused raw material is poured by double-roller rolling equipment；
3) homogenize process is carried out to the plate after casting；
4) hot rolling, reduction ratio >=80% are carried out to the plate after homogenize process；
5) just cold rolling, reduction ratio >=30% are carried out to the plate after hot rolling；
6) it anneals to the plate after first cold rolling；
7) to annealing or plate carry out whole cold rolling so that total reduction >=60% after cold rolling twice；
8) it is heat-treated again after carrying out solution treatment to the plate of whole cold rolling；
9) tension straingtening is carried out to the plate after heat treatment.
2. the manufacturing method according to claim 1, it is characterised in that: the heating melting refers to, heats the raw material to liquid
30-50 DEG C of liquidus temperature；The double roller is hollow copper roller；In casting, the double roller opposite direction rotating, rotation peripheral speed is 50-100m/
Point, while applying the pressure of 1.5-2.0kN/mm to double roller.
3. the manufacturing method according to claim 1, it is characterised in that: the homogenize process refers to, by the plate after casting
Material is heated to after keeping the temperature 10-20 hours after 480-520 DEG C of temperature, is cooled to 320 DEG C with 100-150 DEG C/h of cooling velocity
Below.
4. the manufacturing method according to claim 1, it is characterised in that: the hot rolling refers to, 400-450 DEG C of start rolling temperature.
5. the manufacturing method according to claim 1, it is characterised in that: the annealing refers to, the plate after first cold rolling is added
Heat furnace cooling to after keeping the temperature 1-3 hours after 450-500 DEG C.
6. the manufacturing method according to claim 1, it is characterised in that: the solution treatment refers to, by the plate after whole cold rolling
After material is heated to 520-550 DEG C of solid solution temperature, 4-6 hours are kept the temperature；After plate is then chilled to 165-180 DEG C, then
Heat preservation 1-2 hours, is air-cooled to room temperature.The heat treatment refers to, after plate is heated to 100-120 DEG C, after heat preservation 5-10 hours
It is air-cooled to room temperature.
7. the manufacturing method according to claim 1, it is characterised in that: the tension straingtening refers to, plate is rectified in stretching
Apply in straight equipment to generate the elongation strain of 0.2-0.5%, then 150-160 DEG C at a temperature of keep the temperature 0.5-1 hours.
8. manufacturing method according to claim 1-7, it is characterised in that: in the Al-Mg-Si-type aluminum alloy,
Containing being calculated with mass percentage, 1-1.5%Mg, 3.5-4%Si, 0.3-0.5%Cu, 0.4-1%Fe, 0.05-0.2%
Mn, 0.2-0.3%Li, surplus are Al and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607163.9A CN110238229B (en) | 2019-07-06 | 2019-07-06 | Manufacturing method of aluminum alloy plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607163.9A CN110238229B (en) | 2019-07-06 | 2019-07-06 | Manufacturing method of aluminum alloy plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110238229A true CN110238229A (en) | 2019-09-17 |
| CN110238229B CN110238229B (en) | 2021-07-27 |
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| WO2022192812A1 (en) * | 2021-03-12 | 2022-09-15 | Novelis Inc. | High-strength 5xxx aluminum alloy variants and methods for preparing the same |
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