CN110306085A - A kind of 6061 aluminium alloy of multi-cavity body high strength and preparation method thereof being applicable in automobile door sill - Google Patents
A kind of 6061 aluminium alloy of multi-cavity body high strength and preparation method thereof being applicable in automobile door sill Download PDFInfo
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- CN110306085A CN110306085A CN201910668600.8A CN201910668600A CN110306085A CN 110306085 A CN110306085 A CN 110306085A CN 201910668600 A CN201910668600 A CN 201910668600A CN 110306085 A CN110306085 A CN 110306085A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
Abstract
The present invention provides a kind of 6061 aluminium alloys of multi-cavity body high strength and preparation method thereof for being applicable in automobile door sill, 6061 aluminium alloy stock includes the Ti of the Cu and 0.05-0.18wt% of Fe, 0.12-0.25wt% of Cr, 0.2-0.4wt% of Mg, 0.1-0.3wt% of Mn, 0.7-0.9wt% of Si, 0.1-0.23wt% of 0.6-0.8wt%, surplus Al.The preparation method of 6061 aluminium alloy stock, comprising steps of step (1): melting: obtaining alloy solution；Step (2): filtering: using alloy solution obtained by twin-stage ceramic filter filtration step (1), stand-by liquid is obtained；Step (3): casting ingot casting: is made in the filtered stand-by liquid of step (2)；Step (4): Homogenization Treatments: aluminium alloy ingots is obtained；Step (5): 6061 aluminium alloy extrusions extrusion forming: are obtained；Step (6): heat treatment: up to 6061 aluminium alloys.Thus obtained 6061 aluminium alloy has the characteristics that processability is good, intensity is high, hardness is big, long service life.
Description
Technical field
The present invention relates to metal material fields, and in particular to a kind of 6061 aluminium of multi-cavity body high strength conjunction for being applicable in automobile door sill
Gold and preparation method thereof.
Background technique
To meet automotive light weight technology requirement, meet energy conservation and environmental protection, safe and reliable requirement, various lightweighting materials obtain
Swift and violent development.Compared with automobile steel, aluminium alloy material has many advantages, such as that density is small, intensity is high, corrosion resistant, is able to satisfy automobile
Light-weighted particular/special requirement, it has also become the main material of steel is substituted in automotive light weight technology technology.But due to the limit of crystal structure
System, common aluminum alloy materials forming property is poor, existing the defects of easily causing crackle, cracking, deform in forming process
For some for the processing method of the aluminium alloy extrusions of automobile, intensity, the hardness of aluminium alloy extrusions obtained are excellent not enough, make
Need to be extended with the service life, can not also fully meet automobile use demand.
The object of the present invention is to provide a kind of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill and its preparations
Method.Aluminium alloy extrusions produced by the present invention has the characteristics that processability is good, intensity is high, hardness is big, long service life.
Summary of the invention
The present invention is intended to provide a kind of 6061 aluminium alloy of multi-cavity body high strength and preparation method thereof for being applicable in automobile door sill.This
Car door rocker was designed in the past as the structure member of body of a motor car using cross-section structure, usually thickness was selected to be greater than 1.4mm
Sheet metal increase the anti-side collision performance of sill plate through rolling technology manufacture, but with the lightweight of vehicle, reduce whole
Vehicle oil consumption improves the fuel economy of automobile, on body of a motor car any one can the part of loss of weight be required to corresponding loss of weight
Processing, but loss of weight does not imply that the strength and stiffness for reducing product, production cost should not be also improved, in automobile door sill
Plate will guarantee cannot to lower the threshold while reducing sill plate weight the intensity of plate when designing, while to the greatest extent may be used in process of production
The manufacturing cost that product can be reduced improves the economic benefit of product, thus, it is desirable to carry out to sill plate structure used at present excellent
Change.Automobile door sill before is all made of with a thickness of 1mm and intensity is not less than the sheet metal of 1180MPa, and the present invention is using 6
It is aluminium, and outside the performance for reaching steel, it is lighter.
Specifically, the present invention provides following technical schemes:
One aspect of the present invention provides a kind of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill:
6061 aluminium alloy stock includes Mn, 0.7-0.9wt% of Si, 0.1-0.23wt% of 0.6-0.8wt%
The Ti of the Cu and 0.05-0.18wt% of Fe, 0.12-0.25wt% of Cr, 0.2-0.4wt% of Mg, 0.1-0.3wt%, surplus
For Al.
It is further preferred that 6061 aluminium alloy stock includes Si, 0.11-0.16wt% of 0.65-0.7wt%
The Cu of Fe, 0.21-0.24wt% of Cr, 0.25-0.3wt% of Mg, 0.15-0.2wt% of Mn, 0.85-0.9wt% and
The Ti of 0.08-0.12wt%, surplus Al.
It is further preferred that 6061 aluminium alloy stock includes Mn, 0.89wt% of Si, 0.15wt% of 0.68wt%
Mg, 0.18wt% Cr, 0.25wt% Fe, 0.23wt% Cu and 0.11wt% Ti, surplus Al.
Another aspect of the present invention is to provide a kind of preparation side of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill
Method, comprising steps of
(1) melting: aluminium ingot is added in smelting furnace, and the temperature of smelting furnace is arranged, and the temperature to furnace charge rises to setting
When being worth and starting melting, powdered Mn and Cr are added in smelting furnace, magnesium ingot, aluminum titanium alloy, fine copper and aluminium silicon are added
Intermediate alloy is evenly stirred until that material is completely melt, obtains alloy solution；
(2) it filters: using alloy solution obtained by twin-stage ceramic filter filtration step (1), obtaining stand-by liquid；
(3) it casts: the filtered stand-by liquid of step (2) being cast into aluminium bar, is then kept the temperature under conditions of 520 DEG C -550 DEG C
10-12h, then 560 DEG C of -580 DEG C of heat preservation 7h are warming up to, obtain casting ingot；
(4) Homogenization Treatments: the casting ingot that step (3) obtains is placed in Homogenization Treatments equipment, at 560-580 DEG C
Under the conditions of keep the temperature 6-8 hours, carry out Homogenization Treatments, be made Homogenization Treatments aluminium alloy ingots；
(5) extrusion forming: the aluminium alloy ingots that step (4) is obtained extrusion forming in 50-55MN extruder obtains 6061 aluminium
Alloy profile；
(6) be heat-treated: 6061 aluminium alloy extrusions that step (5) is obtained keep the temperature 3-6 hours under the conditions of 530-560 DEG C,
Solution treatment is carried out, then at room temperature quenching-in water 3-5 minutes, control quenching shift time is no more than 8-10 seconds, finally exists
6-10 hours are kept the temperature under the conditions of 160-200 DEG C, carries out ageing treatment to get 6061 aluminium alloys.
Further, further include step (7): tension straingtening: 6061 aluminium alloy being carried out tension straingtening, amount of tension is
1-5%.
Further, step (2) the twin-stage ceramic filter filter plate mesh number is respectively 30-40 mesh and 50-60 mesh.
Further, the aluminium alloy ingots is heated to 500 DEG C -520 DEG C during step (5) described extrusion forming, temperature
Spending gradient is 6 DEG C -8 DEG C.
Further, extrusion cylinder temperature is 400 DEG C -430 DEG C during step (5) described extrusion forming, extrusion die
Temperature is 460 DEG C -480 DEG C, extrusion speed 4-6m/min.
The beneficial effects of the present invention are:
(1) processing method of 6061 aluminium alloy provided by the invention adjusts 6061 aluminium by addition Mn element and Cr element and closes
The ratio of golden ingredient reaches inhibition grain growth during heating, so that 6061 aluminium alloy has, processability is good, intensity
High, the characteristics of hardness is big, long service life；
(2) processing method of 6061 aluminium alloy provided by the invention is simple, easy to operate, and 6061 aluminium alloys can be effectively reduced
Squeeze crackle.
Specific embodiment
The present invention provides a kind of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill, 6061 aluminium alloy is former
Cr, 0.2- of Mg, 0.1-0.3wt% of Mn, 0.7-0.9wt% of material Si, 0.1-0.23wt% including 0.6-0.8wt%
The Ti of the Cu and 0.05-0.18wt% of Fe, 0.12-0.25wt% of 0.4wt%, surplus Al；Preferably, 6061 aluminium closes
Golden raw material includes Mg, 0.15-0.2wt% of Mn, 0.85-0.9wt% of Si, 0.11-0.16wt% of 0.65-0.7wt%
The Ti of the Cu and 0.08-0.12wt% of Fe, 0.21-0.24wt% of Cr, 0.25-0.3wt%, surplus Al；Further preferably
Ground, 6061 aluminium alloy stock include Mg, 0.18wt% of Mn, 0.89wt% of Si, 0.15wt% of 0.68wt% Cr,
The Ti of the Cu and 0.11wt% of Fe, 0.23wt% of 0.25wt%, surplus Al.
The present invention also provides a kind of preparation methods of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill, including step
It is rapid:
(1) melting: aluminium ingot is added in smelting furnace, and the temperature of smelting furnace is arranged, and the temperature to furnace charge rises to setting
When being worth and starting melting, powdered Mn and Cr are added in smelting furnace, magnesium ingot, aluminum titanium alloy, fine copper and aluminium silicon are added
Intermediate alloy is evenly stirred until that material is completely melt, obtains alloy solution；
(2) it filters: using alloy solution obtained by twin-stage ceramic filter filtration step (1), obtaining stand-by liquid；The twin-stage pottery
Porcelain filter filter plate mesh number is respectively 30-40 mesh and 50-60 mesh；Preferably, the twin-stage ceramic filter filter plate mesh number
Respectively 35 mesh and 55 mesh；
(3) it casts: the filtered stand-by liquid of step (2) being cast into aluminium bar, is then kept the temperature under conditions of 520 DEG C -550 DEG C
10-12h, then 560 DEG C of -580 DEG C of heat preservation 7h are warming up to, obtain casting ingot；Preferably, 11h is kept the temperature under conditions of 535 DEG C, then
It is warming up to 570 DEG C of heat preservation 7h；
(4) Homogenization Treatments: the casting ingot that step (3) obtains is placed in Homogenization Treatments equipment, at 560-580 DEG C
Under the conditions of keep the temperature 6-8 hours, carry out Homogenization Treatments, be made Homogenization Treatments aluminium alloy ingots；Preferably, in 570 DEG C of conditions
Lower heat preservation 7 hours；
(5) extrusion forming: the aluminium alloy ingots that step (4) is obtained extrusion forming in 50-55MN extruder obtains 6061 aluminium
Alloy profile；The aluminium alloy ingots is heated to 500 DEG C -520 DEG C during the extrusion forming, temperature gradient is 6 DEG C -8 DEG C；
Extrusion cylinder temperature is 400 DEG C -430 DEG C during the extrusion forming, and the temperature of extrusion die is 460 DEG C -480 DEG C, squeezes speed
Degree is 4-6m/min；Preferably, the aluminium alloy ingots is heated to 510 DEG C during the extrusion forming, temperature gradient 7
℃；Extrusion cylinder temperature is 415 DEG C during the extrusion forming, and the temperature of extrusion die is 470 DEG C, extrusion speed 5m/
min；
(6) be heat-treated: 6061 aluminium alloy extrusions that step (5) is obtained keep the temperature 3-6 hours under the conditions of 530-560 DEG C,
Solution treatment is carried out, then at room temperature quenching-in water 3-5 minutes, control quenching shift time is no more than 8-10 seconds, finally exists
6-10 hours are kept the temperature under the conditions of 160-200 DEG C, carries out ageing treatment to get 6061 aluminium alloys；Preferably, under the conditions of 545 DEG C
Heat preservation 4 hours carries out solution treatment, and then at room temperature quenching-in water 4 minutes, control quenching shift time was no more than 9 seconds, finally
8 hours are kept the temperature under the conditions of 180 DEG C；
(7) 6061 aluminium alloy tension straingtening: is carried out tension straingtening, amount of tension 1-5%；Preferably, amount of tension
It is 3%.
The present invention is further elaborated With reference to embodiment, but the present invention is not limited to following embodiment party
Formula.
Embodiment 1
A kind of preparation method for 6061 aluminium alloy of multi-cavity body high strength being applicable in automobile door sill:
(1) melting: aluminium ingot is added in smelting furnace, and the temperature of smelting furnace is arranged, and the temperature to furnace charge rises to setting
When being worth and starting melting, powdered Mn and Cr are added in smelting furnace, magnesium ingot, aluminum titanium alloy, fine copper and aluminium silicon are added
Intermediate alloy is evenly stirred until that material is completely melt, obtains alloy solution；
(2) it filters: using alloy solution obtained by twin-stage ceramic filter filtration step (1), obtaining stand-by liquid；The twin-stage pottery
Porcelain filter filter plate mesh number is respectively 30 mesh and 50 mesh；
(3) it casts: the filtered stand-by liquid of step (2) being cast into aluminium bar, 10h is then kept the temperature under conditions of 520 DEG C, then
560 DEG C of heat preservation 7h are warming up to, casting ingot is obtained；
(4) Homogenization Treatments: the casting ingot that step (3) obtains is placed in Homogenization Treatments equipment, in 560 DEG C of conditions
Lower heat preservation 6 hours, carries out Homogenization Treatments, and the aluminium alloy ingots of Homogenization Treatments is made；
(5) extrusion forming: the aluminium alloy ingots that step (4) is obtained extrusion forming in 50MN extruder obtains the conjunction of 6061 aluminium
Metal type material；The aluminium alloy ingots is heated to 500 DEG C during the extrusion forming, temperature gradient is 6 DEG C；The extrusion forming
Extrusion cylinder temperature is 400 DEG C in the process, and the temperature of extrusion die is 460 DEG C, extrusion speed 4m/min；
(6) be heat-treated: 6061 aluminium alloy extrusions that step (5) is obtained keep the temperature 3 hours under the conditions of 530 DEG C, consolidate
Molten processing, then at room temperature quenching-in water 3 minutes, control quenching shift time is no more than 8 seconds, finally protects under the conditions of 160 DEG C
Temperature 6 hours carries out ageing treatment to get 6061 aluminium alloys；
(7) 6061 aluminium alloy tension straingtening: is carried out tension straingtening, amount of tension 2%.
Embodiment 2
A kind of preparation method for 6061 aluminium alloy of multi-cavity body high strength being applicable in automobile door sill:
(1) melting: aluminium ingot is added in smelting furnace, and the temperature of smelting furnace is arranged, and the temperature to furnace charge rises to setting
When being worth and starting melting, powdered Mn and Cr are added in smelting furnace, magnesium ingot, aluminum titanium alloy, fine copper and aluminium silicon are added
Intermediate alloy is evenly stirred until that material is completely melt, obtains alloy solution；
(2) it filters: using alloy solution obtained by twin-stage ceramic filter filtration step (1), obtaining stand-by liquid；The twin-stage pottery
Porcelain filter filter plate mesh number is respectively 35 mesh and 55 mesh；
(3) it casts: the filtered stand-by liquid of step (2) being cast into aluminium bar, 11h is then kept the temperature under conditions of 530 DEG C, then
570 DEG C of heat preservation 7h are warming up to, casting ingot is obtained；
(4) Homogenization Treatments: the casting ingot that step (3) obtains is placed in Homogenization Treatments equipment, in 570 DEG C of conditions
Lower heat preservation 7 hours, carries out Homogenization Treatments, and the aluminium alloy ingots of Homogenization Treatments is made；
(5) extrusion forming: the aluminium alloy ingots that step (4) is obtained extrusion forming in 53MN extruder obtains the conjunction of 6061 aluminium
Metal type material；The aluminium alloy ingots is heated to 510 DEG C during the extrusion forming, temperature gradient is 7 DEG C；The extrusion forming
Extrusion cylinder temperature is 415 DEG C in the process, and the temperature of extrusion die is 470 DEG C, extrusion speed 5m/min；
(6) be heat-treated: 6061 aluminium alloy extrusions that step (5) is obtained keep the temperature 4 hours under the conditions of 545 DEG C, consolidate
Molten processing, then at room temperature quenching-in water 4 minutes, control quenching shift time is no more than 9 seconds, finally protects under the conditions of 180 DEG C
Temperature 8 hours carries out ageing treatment to get 6061 aluminium alloys；
(7) 6061 aluminium alloy tension straingtening: is carried out tension straingtening, amount of tension 3%.
Embodiment 3
(1) melting: aluminium ingot is added in smelting furnace, and the temperature of smelting furnace is arranged, and the temperature to furnace charge rises to setting
When being worth and starting melting, powdered Mn and Cr are added in smelting furnace, magnesium ingot, aluminum titanium alloy, fine copper and aluminium silicon are added
Intermediate alloy is evenly stirred until that material is completely melt, obtains alloy solution；
(2) it filters: using alloy solution obtained by twin-stage ceramic filter filtration step (1), obtaining stand-by liquid；The twin-stage pottery
Porcelain filter filter plate mesh number is respectively 40 mesh and 60 mesh；
(3) it casts: the filtered stand-by liquid of step (2) being cast into aluminium bar, 12h is then kept the temperature under conditions of 550 DEG C, then
580 DEG C of heat preservation 7h are warming up to, casting ingot is obtained；
(4) Homogenization Treatments: the casting ingot that step (3) obtains is placed in Homogenization Treatments equipment, in 580 DEG C of conditions
Lower heat preservation 8 hours, carries out Homogenization Treatments, and the aluminium alloy ingots of Homogenization Treatments is made；
(5) extrusion forming: the aluminium alloy ingots that step (4) is obtained extrusion forming in 55MN extruder obtains the conjunction of 6061 aluminium
Metal type material；The aluminium alloy ingots is heated to 520 DEG C during the extrusion forming, temperature gradient is 8 DEG C；The extrusion forming
Extrusion cylinder temperature is 430 DEG C in the process, and the temperature of extrusion die is 480 DEG C, extrusion speed 6m/min；
(6) be heat-treated: 6061 aluminium alloy extrusions that step (5) is obtained keep the temperature 6 hours under the conditions of 560 DEG C, consolidate
Molten processing, then at room temperature quenching-in water 5 minutes, control quenching shift time is no more than 10 seconds, finally protects under the conditions of 200 DEG C
Temperature 10 hours carries out ageing treatment to get 6061 aluminium alloys；
(7) 6061 aluminium alloy tension straingtening: is carried out tension straingtening, amount of tension 5%.
Verification test
Test example 1
Embodiment 1-3 is repeated, 6061 enough aluminium alloys are obtained.
By taking 6061 aluminium alloys of embodiment 3 as an example.The meter Chong Wei 18kg/m of 6061 aluminium alloy is raw in 55MN extruder
It produces, extrusion speed is up under conditions of 6m/min, does not occur extruding crackle.
Likewise, 6061 aluminium alloys of embodiment 1-2 are measured under conditions of extrusion speed is up to 6m/min, also not
Occur squeezing crackle.Also, the highest extrusion speed that 6061 aluminium alloys are able to bear in embodiment 3 is greater than embodiment 1-2.
In addition, under conditions of extrusion speed is 2.8m/min, surface is by taking 6061 aluminium alloys in the prior art as an example
It generates and squeezes crackle.Test result is as shown in table 1:
Table 1 squeezes check experiment result
It can thus be seen that the processing method of 6061 aluminium alloy provided in an embodiment of the present invention obtain good product performance,
Intensity is high, hardness is big, long service life.
In conclusion the processing method of 6061 aluminium alloy provided in an embodiment of the present invention is simple, and it is easy to operate, 6061 aluminium can be made
The performance of alloy is more excellent, intensity is higher, hardness is bigger, the service life is longer, more suitable for using on automobile door sill.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (8)
1. a kind of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill, which is characterized in that including 0.6-0.8wt%'s
Fe, 0.12- of Cr, 0.2-0.4wt% of Mg, 0.1-0.3wt% of Mn, 0.7-0.9wt% of Si, 0.1-0.23wt%
The Ti of the Cu and 0.05-0.18wt% of 0.25wt%, surplus Al.
2. a kind of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill according to claim 1, which is characterized in that
6061 aluminium alloy stock include Mn, 0.85-0.9wt% of Si, 0.11-0.16wt% of 0.65-0.7wt% Mg,
The Ti of the Cu and 0.08-0.12wt% of Fe, 0.21-0.24wt% of Cr, 0.25-0.3wt% of 0.15-0.2wt%, surplus are
Al。
3. a kind of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill according to claim 1, which is characterized in that
6061 aluminium alloy stock include Mg, 0.18wt% of Mn, 0.89wt% of Si, 0.15wt% of 0.68wt% Cr,
The Ti of the Cu and 0.11wt% of Fe, 0.23wt% of 0.25wt%, surplus Al.
4. a kind of preparation method of such as any 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill of claim 1-3,
Characterized by comprising the following steps:
(1) melting: aluminium ingot is added in smelting furnace, and the temperature of smelting furnace is arranged, and the temperature to furnace charge rises to setting value simultaneously
When starting melting, powdered Mn and Cr are added in smelting furnace, added among magnesium ingot, aluminum titanium alloy, fine copper and aluminium silicon
Alloy is evenly stirred until that material is completely melt, obtains alloy solution；
(2) it filters: using alloy solution obtained by twin-stage ceramic filter filtration step (1), obtaining stand-by liquid；
(3) it casts: the filtered stand-by liquid of step (2) being cast into aluminium bar, then keeps the temperature 10- under conditions of 520 DEG C -550 DEG C
12h, then 560 DEG C of -580 DEG C of heat preservation 7h are warming up to, obtain casting ingot；
(4) Homogenization Treatments: the casting ingot that step (3) obtains is placed in Homogenization Treatments equipment, in 560-580 DEG C of condition
Lower heat preservation 6-8 hours carries out Homogenization Treatments, and the aluminium alloy ingots of Homogenization Treatments is made；
(5) extrusion forming: the aluminium alloy ingots that step (4) is obtained extrusion forming in 50-55MN extruder obtains 6061 aluminium alloys
Profile；
(6) be heat-treated: 6061 aluminium alloy extrusions that step (5) is obtained keep the temperature 3-6 hours under the conditions of 530-560 DEG C, carry out
Solution treatment, then at room temperature quenching-in water 3-5 minutes, control quenching shift time is no more than 8-10 seconds, finally in 160-200
6-10 hours are kept the temperature under the conditions of DEG C, carries out ageing treatment to get 6061 aluminium alloys.
5. a kind of preparation method of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill according to claim 4,
It is characterized by further comprising:
(7) 6061 aluminium alloy tension straingtening: is carried out tension straingtening, amount of tension 1-5%.
6. a kind of preparation method of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill according to claim 4,
It is characterized in that, step (2) the twin-stage ceramic filter filter plate mesh number is respectively 30-40 mesh and 50-60 mesh.
7. a kind of preparation method of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill according to claim 4,
It is characterized in that, the aluminium alloy ingots is heated to 500 DEG C -520 DEG C during step (5) described extrusion forming, temperature gradient
It is 6 DEG C -8 DEG C.
8. a kind of preparation method of 6061 aluminium alloy of multi-cavity body high strength for being applicable in automobile door sill according to claim 4,
It is characterized in that, extrusion cylinder temperature is 400 DEG C -430 DEG C during step (5) described extrusion forming, the temperature of extrusion die is
460 DEG C -480 DEG C, extrusion speed 4-6m/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074087A (en) * | 2019-12-25 | 2020-04-28 | 上海友升铝业有限公司 | Automobile doorsill beam aluminum alloy and preparation method thereof |
| CN112537337A (en) * | 2020-11-20 | 2021-03-23 | 中车唐山机车车辆有限公司 | Integrated coupler panel and forming method thereof |
| CN112646986A (en) * | 2020-09-09 | 2021-04-13 | 广东吉源铝业有限公司 | Production process of 6061T651 aluminum alloy plate |
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| CN116287899A (en) * | 2023-03-24 | 2023-06-23 | 北京欧力普城市科技有限公司 | Aluminum alloy for lamp post and preparation method thereof |
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