CN104988367B - Aluminum alloy extrusion profile for car anti-locked braking system and production method thereof - Google Patents
Aluminum alloy extrusion profile for car anti-locked braking system and production method thereof Download PDFInfo
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- 238000001125 extrusion Methods 0.000 title claims abstract description 124
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000005266 casting Methods 0.000 claims abstract description 78
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 42
- 238000000265 homogenisation Methods 0.000 claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000007872 degassing Methods 0.000 claims abstract description 37
- 230000032683 aging Effects 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 230000003746 surface roughness Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 52
- 239000004411 aluminium Substances 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 32
- 238000007670 refining Methods 0.000 claims description 31
- 238000002844 melting Methods 0.000 claims description 25
- 230000008018 melting Effects 0.000 claims description 25
- 238000012545 processing Methods 0.000 claims description 20
- 238000011282 treatment Methods 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- 239000011148 porous material Substances 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 9
- 241000220317 Rosa Species 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 22
- 230000009286 beneficial effect Effects 0.000 description 10
- 239000000956 alloy Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000002244 precipitate Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000010791 quenching Methods 0.000 description 6
- 230000000171 quenching effect Effects 0.000 description 6
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 229910018571 Al—Zn—Mg Inorganic materials 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 229910018191 Al—Fe—Si Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
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- 229910001873 dinitrogen Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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Abstract
The invention relates to aluminum alloy extrusion profile for a car anti-locked braking system. The surface roughness of the aluminum alloy extrusion profile is smaller than or equal to 10 micrometers. The aluminum alloy extrusion profile is prepared by, by weight, the following raw materials of 2.0%-4.0% of Si, 0.08%-0.35% of Cu, 0.75%-1.0% of Mg, 0.05%-0.20% of Cr, 0.15%-0.30% of Ti, smaller than or equal to 0.15% of impurities and the balance Al. A production method of the aluminum alloy extrusion profile comprises the steps of 1, smelting; 2, standing and degassing; 3, filtering and casting; 4, homogenization treating and saw cutting; 5, extruding, wherein normal temperature nitrogen is continuously pumped into an extrusion die outlet; 6, water cooling and aging. Compared with the prior art, the aluminum alloy extrusion profile has the advantages that the better processability and corrosion resistance are achieved, and meanwhile the better strength and mechanical property are achieved; an anaerobic environment can be formed at the die outlet by pumping the normal temperature nitrogen when the extruding process is performed, therefore, the phenomenon that aluminum oxide is formed to attach to the die outlet due to the fact that the high-temperature aluminum profile makes contact with air to be oxidized when the high-temperature aluminum profile is extruded from the die outlet is avoided, the phenomenon that a die attached with the aluminum oxide scratches the surface of the profile extruded subsequently is further avoided, and the appearance quality of the profile is guaranteed.
Description
Technical field
Closed the present invention relates to aluminum alloy extrusion section bar field, more particularly to a kind of aluminium for anti-lock braking system
Golden extrudate and its production method.
Background technology
With the fast development of automobile industry, consumer is to the security requirement more and more higher of automobile, anti-lock brake system
System (ABS) is widely applied in the middle of automobile making as sure brake system, and ABS has anti-lock, the effect of anti-sideslip, is led to
Cross electronic sensor and oil pressure cntrol to be adjusted the brake condition of automobile, effectively increase the security of automobile；Because its work
Make the particularity (oil pressure cntrol) of environment and the importance (security system) of its function, as ABS system body junction
The all requirements such as performance, intensity, the tissue of structure component materials are stricter.
Al-Zn-Mg systems (7 are) aluminium alloy has mechanical property and intensity higher, but its decay resistance and processability
Can be poor, although Al-Mg-Si system alloy has preferable decay resistance and a processing characteristics, but its mechanical property and intensity compared with
Difference, considers the difficulty that Al-Zn-Mg line aluminium alloys are improved in terms of decay resistance and processing characteristics and is higher than Al-Mg-Si systems
Aluminium alloy improves mechanical property and intensity, it is seen that Al-Mg-Si system alloy is more suitable for the main structural component material of ABS system
Material, but the intensity and grain structure of routine Al-Mg-Si system alloy are all unable to reach the requirement of product at present, therefore, how to improve
The intensity and grain structure of Al-Mg-Si system alloy become key.The surface quality requirements of the main structural component of ABS system
Strictly, and as high temperature extrusion section bar, surface oxidation abrasion is obvious, and the surface quality for how improving section bar is most important.
Brief description of the drawings
Fig. 1 is the structural representation of the die-cushion in the present invention；
Fig. 2 is the metallographic structure figure of the aluminum alloy extrusion section bar in the present invention；
In accompanying drawing, the list of parts representated by each label is as follows：
1st, air-filled pore, 2, nitrogen concentration zones, 3, material outlet area.
The content of the invention
The technical problems to be solved by the invention are to provide that a kind of intensity is high, mechanical property is good, good processability, surface matter
Measure, corrosion resistant aluminum alloy extrusion section bar and its production method for anti-lock braking system.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surface roughness≤10 μm, with weight
Amount percentages, it is made up of each raw material of following content：Si2.0%-4.0%, Cu0.08%-0.35%, Mg0.75%-
1.0%th, Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, balance of Al.
Compared with prior art, the beneficial effects of the invention are as follows：
By the Si contents control in aluminum alloy extrusion section bar in 2.0%-4.0%, Cu contents are controlled in 0.08%- the present invention
0.35%, the content of Si, makes Si that Mg is formed in aluminium alloy wherein in remote unconventional 6 line aluminium alloy of the content of Si2It is remaining after Si
Between crystal grain, the crocking resistance to section bar is greatly improved a large amount of list Si Dispersed precipitates, while by Ti constituent content controls
System is in 0.15%-0.30%, it is ensured that it fully dissolves, can effectively crystal grain thinning, improve grainiess, can so ensure
Aluminum alloy extrusion section bar with preferable processing characteristics and while corrosion resistance, also with good intensity and mechanical property
Energy.
It is the mechanical property of ABS section bars, hard to ensure the service life of ABS because ABS is operated by oil pressure cntrol
Degree and crocking resistance requirement are higher, and for this problem, the present invention makes Si in aluminium alloy by greatly improving the content of Si
Form Mg2After Si, remaining a large amount of list Si Dispersed precipitates are between crystal grain, and the crocking resistance to section bar is greatly improved, right
The performance and hardness of product also have different degrees of raising.
Because the requirement of the working environment of oil pressure cntrol, ABS section bars also have requirement higher for grain structure, crystal grain is got over
It is small, organize finer and close, the probability that ABS breaks down is lower, and the present invention is (remote super general by greatly improving the Ti contents in alloy
Content in wrought aluminium alloy) effect of crystal grain thinning is reached, while casting temperature is improved to more than 770 DEG C, abundant dissolving
While Ti alloys, the crystal grain that high temperature casting also can be refined effectively, the effect of high temperature casting crystal grain thinning is even higher than increasing
Plus the effect of Ti content crystal grain thinnings, while structures shape performance, after crystal grain refinement, mechanical property and hardness also have certain carrying
It is high.
Multiple faces are not processed ABS section bars in process, if surface quality is poor, being processed for client influences
It is larger, and the Surface of profile quality of high temperature extruding forming is typically not so good as other cold-formed section bars, to ensure its surface matter
Amount, leads to nitrogen, it is to avoid section bar is aoxidized in exit when the present invention is using extruding in the exit of mould, effectively the table of protection section bar
Face quality.
A kind of production method of aluminum alloy extrusion section bar for anti-lock braking system, it is comprised the following steps：
A, melting
By weight percentage, it is Si2.0%-4.0%, Cu0.08%-0.35%, Mg0.75%- by chemical composition
1.0%th, the composition input melting of Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, balance of Al
Stove, melting is carried out under conditions of being 740-790 DEG C in temperature, is transferred to refining furnace after melting again, and refining agent is added by 2kg/T,
Temperature be 740-770 DEG C under conditions of refine 20min, the aluminium liquid after being refined；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 8-10kg, in the bar that temperature is 740-770 DEG C
20min is stood under part, getter degassing and purifying is recycled, the aluminium liquid after degasification is obtained；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, is adopted under conditions of being then 770-800 DEG C in temperature
Cast with hot top mode, casting rod is obtained after cooling；
D, Homogenization Treatments and sawing
Casting rod is transferred into uniform stove carries out Homogenization Treatments, then cools down, then casting rod is sawed into scale rod, driving of going forward side by side
Skin, the casting rod after being processed；
E, extruding
The casting rod after the processing is extruded with extrusion die by extruder, in the outlet of extrusion die during extruding
Place is continually fed into nitrogen at room, the material for being squeezed out；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, room temperature is cooled to, artificial aging is finally carried out, that is, obtains described
The aluminum alloy extrusion section bar for anti-lock braking system.
Compared with prior art, the beneficial effects of the invention are as follows：
By the Si contents control in section bar in 2.0%-4.0%, Cu contents are controlled in 0.08%-0.35%, Ti the present invention
Constituent content is controlled in 0.15%-0.30%, while by smelting temperature control at 740-790 DEG C, casting temperature is controlled in 770-
800 DEG C so that Si forms Mg in aluminium alloy2After Si, remaining a large amount of list Si Dispersed precipitates between crystal grain, to the antifriction of section bar
Wipe performance to be greatly improved, while ensureing that Ti elements are fully dissolved, effectively improve the grainiess of aluminum alloy materials,
So that crystalline structure is more uniform tiny, it is ensured that aluminum alloy extrusion section bar is same with preferable processing characteristics and corrosion resistance
When, will also with good intensity and mechanical property；Meanwhile, the present invention is passed through nitrogen at room in extrusion die exit, in mould
Tool exit formed anoxic, the environment of anaerobic, it is to avoid ingress of air when high temperature aluminium section bar is extruded from mould outlet and aoxidize shape
Into Alumina build-up at mould outlet, and then avoid the mould for being attached with aluminum oxide from scratching the Surface of profile of subsequent extrusion, protect
Demonstrate,prove the presentation quality of section bar.
As a kind of preferred embodiment of the invention, in stepb, during degasification, getter rotating speed 450r/min with
On, the flow that getter is passed through argon gas is maintained at 1.0-1.85m3/h。
Beneficial effect using above-mentioned preferred scheme is：Using inert gas argon gas degasification, and ensure that getter rotating speed exists
More than 450r/min, can reach more preferable degassing and purifying effects.
Used as another preferred embodiment of the invention, in step C, in casting process, casting speed is 70-
80mm/min, cooling water inflow is 100-110L/min during cooling.
Beneficial effect using above-mentioned preferred scheme is：Casting speed is controlled for 70-80mm/min, cooling water inflow during cooling
It is 100-110L/min, has both can guarantee that the casting rod quality for obtaining, the speed of casting is can guarantee that again.
As another preferred embodiment of the invention in step D, during Homogenization Treatments, homogenization temperature
It it is 530-555 DEG C, homogenization time is 8h.
Beneficial effect using above-mentioned preferred scheme is：During by homogenization temperature control between 530-555 DEG C, Neng Gouyou
Effect eliminates the segregation of the main component such as Si, Mg, Cu in aluminium alloy extrusions, while refining the thick crystallization formed in casting process
Thing, improves the toughness and yield strength of material, and reduces the extrusion stress of material.
As another preferred embodiment of the invention, in step D, the type of cooling be more than strong wind chilling 2.5h or
More than water-cooled 0.5h.
Beneficial effect using above-mentioned preferred scheme is：Ensure that casting rod can be completed more preferably faster after Homogenization Treatments
Cooling technique.
Used as another preferred embodiment of the invention, in step E, the specification of the extruder is 6000t, is being squeezed
During pressure, the heating-up temperature of the extrusion die is 430-470 DEG C, and the heating-up temperature of the casting rod after the processing is 490-
530 DEG C, outlet temperature is 500-540 DEG C, and extrusion speed is 4-6m/min.
Beneficial effect using above-mentioned preferred scheme is：Can when the heating and temperature control of casting rod is between 490-530 DEG C
It is effective to reduce extruding drag, preferable mechanical property is can guarantee that again；Mold temperature is controlled between 430-470 DEG C, both can be with
Avoid because mold temperature is too low, and the squeeze pressure for causing is big, product extrusion speed plays that speed is slow, material property is impacted etc. asks
Topic, can avoid because mold temperature is too high, and the mould for causing easily is annealed again, the problems such as die life reduces；Extrusion speed control
System between 4-6m/min, can both avoid because excessive velocities and caused by product edges and corners easily there is the problem of crackle, again may be used
To avoid leading to not ensure the promptness of outlet temperature and quenching because speed is excessively slow；And it is 500- to ensure outlet temperature
540 DEG C of validity that can preferably ensure product quenching.
Used as another preferred embodiment of the invention, in step E, nitrogen at room is by the die-cushion with air-filled pore
The exit of the extrusion die is continually fed into the flow velocity of 5-20L/min, the die-cushion is provided with and the extrusion die
The die-cushion outlet that matches of outlet, die-cushion outlet include near the nitrogen concentration zones of the extrusion die with away from described
The material outlet area of extrusion die, the width of the width less than the nitrogen concentration zones in the material outlet area, the air-filled pore
Connected with the nitrogen concentration zones.
Beneficial effect using above-mentioned preferred scheme is：Nitrogen at room is by the die-cushion with air-filled pore with 5-20L/min
Flow velocity be continually fed into the exit of extrusion die, and material outlet area width of the width less than nitrogen concentration zones, energy
Nitrogen is enough set to be easier full of nitrogen concentration zones, it is ensured that the stability of nitrogen environment.
As another preferred embodiment of the invention, in step F, when online water-cooled is carried out, in the extruding
The water outlet simultaneously up and down of the material for going out, two outlet on top and bottom amount is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps
Uniform cooling.
Beneficial effect using above-mentioned preferred scheme is：Using cooling by water, quenching technical is water standard-sized sheet up and down,
Upper and lower water is 60m3/ h, left and right water is 30m3/ h, can either ensure the quenching degree of quenching, and mechanics higher can be obtained again
Performance and intensity.
Used as another preferred embodiment of the invention, in step F, the temperature for carrying out artificial aging is 170-180
DEG C, the time for carrying out artificial aging is 7-10h.
Beneficial effect using above-mentioned preferred scheme is：The temperature of artificial aging between 170-180 DEG C, when carrying out artificial
7-10 hours of effect, can preferably promote the aluminium alloy supersaturated solid solution that can be formed after quenching to decompose and dispersed, carry
Material property high, fully eliminates section bar internal stress, further improves the tensile strength and yield strength of product.
The present invention is described in further details below.
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surface roughness≤10 μm, with weight
Amount percentages, it is made up of each raw material of following content：Si2.0%-4.0%, Cu0.08%-0.35%, Mg0.75%-
1.0%th, Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, balance of Al.
Fe is impurity in the present invention, and Al-Fe-Si based compounds are easily combined to form with Al, Si, and easy fracture makes toughness of material
Reduce, therefore, the content of Fe should be controlled below 0.15%.
A kind of production method of aluminum alloy extrusion section bar for anti-lock braking system, it is comprised the following steps：
A, melting
By weight percentage, it is Si2.0%-4.0%, Cu0.08%-0.35%, Mg0.75%- by chemical composition
1.0%th, the composition input melting of Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, balance of Al
Stove, melting is carried out under conditions of being 740-790 DEG C in temperature, is transferred to refining furnace after melting again, and refining agent is added by 2kg/T,
Temperature be 740-770 DEG C under conditions of refine 20min, the aluminium liquid after being refined；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 8-10kg, in the bar that temperature is 740-770 DEG C
20min is stood under part, getter degassing and purifying is recycled, getter rotating speed is passed through argon gas in more than 450r/min, getter
Flow is maintained at 1.0-1.85m3/ h, obtains the aluminium liquid after degasification；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, then temperature be 770-800 DEG C, casting speed be
Cast using hot top mode under conditions of 70-80mm/min, cooled down under conditions of cooling water inflow is 100-110L/min
Obtain casting rod afterwards；
Ti elements have the effect of crystal grain thinning in the present invention, the appropriate content for increasing Ti elements, can effectively refine crystalline substance
Grain, improves grainiess, and the casting temperature of usual 6 line aluminium alloy is between 700-750 DEG C, but the fusing point of Ti is higher, significantly
Increase the content of Ti, Ti cannot fully dissolve, and easily form AL3The thick crystal of Ti, deteriorates product tissue, and works as casting temperature and surpass
When crossing 750 DEG C, crystal grain is easily grown up under overheat condition, causes tissue deterioration, therefore, the present invention is ensureing smelting temperature in 740-
790 DEG C, casting temperature while 770-800 DEG C, greatly improve Ti constituent contents, control Ti constituent contents are in 0.15%-
0.30%, such Ti elements just can fully be dissolved, because melt crystallization is for crystalline is clicked through by heterogeneous structure particle
Row crystallization, when a small amount of overheat, at such as 750-770 DEG C, heterogeneous structure can be dissolved or activity is reduced, and crystallization particle is reduced, must
Can so cause crystal grain to be grown up, and work as temperature and further rise to a specified temp, i.e., at 770-800 DEG C, the increase meeting of degree of supercooling
Melt is caused to depart from heterogeneous structure particle and spontaneous crystallization, therefore crystalline structure is more uniform tiny, effectively improves crystal grain
Tissue, while also improving the intensity and decay resistance of material.
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, and homogenization temperature is 530-555 DEG C, and homogenization time is
8h, then more than strong wind chilling 2.5h or more than water-cooled 0.5h, then casting rod is sawed into scale rod, driving skin of going forward side by side is added
Casting rod after work；
E, extruding
The casting rod after the processing is extruded with extrusion die by the extruder of 6000t, in extrusion process, institute
It is 430-470 DEG C to state the heating-up temperature of extrusion die, and the heating-up temperature of the casting rod after the processing is 490-530 DEG C, outlet temperature
It is 500-540 DEG C to spend, and extrusion speed is 4-6m/min, and by nitrogen at room by the die-cushion with air-filled pore with 5-20L/min
Flow velocity be continually fed into the exit of the extrusion die, the die-cushion is provided with and matches with the outlet of the extrusion die
Die-cushion outlet, die-cushion outlet includes near the nitrogen concentration zones of the extrusion die and the material away from the extrusion die
Material outlet area, the width of the width less than the nitrogen concentration zones in the material outlet area, the air-filled pore and the nitrogen collection
Middle area's connection, while perforate is used to be fixed together on mould and die-cushion on die-cushion, is squeezed out after extrusion process
Material；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, in the water outlet simultaneously up and down of the material for squeezing out,
Two outlet on top and bottom amount is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps uniform cooling, is cooled to room temperature, finally carries out
Artificial aging, aging temp is 170-180 DEG C, carries out time of artificial aging for 7-10h, is finally obtained described for automobile
The aluminum alloy extrusion section bar of anti-lock braking system.
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
Embodiment 1
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surface roughness≤10 μm, with weight
Amount percentages, it is made up of each raw material of following content：Si2.5%, Cu0.15%, Mg0.8%, Cr0.1%, Ti0.2%,
Impurity≤0.15%, balance of Al, as shown in Fig. 2 in the present invention aluminum alloy extrusion section bar metallographic structure uniform small grains,
The content of Si, makes Si that Mg is formed in aluminium alloy in remote unconventional 6 line aluminium alloy of the content of Si2After Si, remaining a large amount of list Si are more
Dissipate and be distributed between crystal grain, the crocking resistance to section bar is greatly improved.
A kind of production method of aluminum alloy extrusion section bar for anti-lock braking system, it is comprised the following steps：
A, melting
By weight percentage, by chemical composition be Si2.5%, Cu0.15%, Mg0.8%, Cr0.1%, Ti0.2%,
The composition input smelting furnace of impurity≤0.15%, balance of Al, carries out melting, after melting under conditions of being 750 DEG C in temperature
Refining furnace is transferred to again, refining agent is added by 2kg/T, refine 20min under conditions of being 740 DEG C in temperature, the aluminium after being refined
Liquid；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 8kg, is stood under conditions of being 740 DEG C in temperature
20min, recycles getter degassing and purifying, and in more than 450r/min, the flow that getter is passed through argon gas keeps getter rotating speed
In 1.0m3/ h, obtains the aluminium liquid after degasification；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, then temperature be 770 DEG C, casting speed be
Cast using hot top mode under conditions of 70mm/min, obtained after being cooled down under conditions of cooling water inflow is 100L/min
Casting rod；
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, and homogenization temperature is 530 DEG C, and homogenization time is 8h, so
More than strong wind chilling 2.5h or more than water-cooled 0.5h afterwards, then casting rod is sawed into scale rod, driving skin of going forward side by side, after being processed
Casting rod；
E, extruding
The casting rod after the processing is extruded with extrusion die by the extruder of 6000t, in extrusion process, institute
It is 430 DEG C to state the heating-up temperature of extrusion die, and the heating-up temperature of the casting rod after the processing is 490 DEG C, and outlet temperature is 500
DEG C, extrusion speed is 4m/min, and nitrogen at room is continually fed into by the die-cushion with air-filled pore 1 with the flow velocity of 5L/min
The exit of the extrusion die, as shown in figure 1, the die-cushion is provided with the die-cushion matched with the outlet of the extrusion die
Outlet, the die-cushion outlet includes going out with the material away from the extrusion die near the nitrogen concentration zones 2 of the extrusion die
Mouth region 3, the width of the width less than the nitrogen concentration zones 2 in the material outlet area 3, the air-filled pore 1 and the nitrogen collection
Middle area 2 connects, while perforate is used to be fixed together on mould and die-cushion on die-cushion, is squeezed out after extrusion process
Material；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, in the water outlet simultaneously up and down of the material for squeezing out,
Two outlet on top and bottom amount is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps uniform cooling, is cooled to room temperature, finally carries out
Artificial aging, aging temp is 170 DEG C, carries out time of artificial aging for 7h, is finally obtained described for automobile anti-lock braking
The aluminum alloy extrusion section bar of brake system.
Embodiment 2
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surface roughness≤10 μm, with weight
Amount percentages, it is made up of each raw material of following content：Si4.0%, Cu0.35%, Mg1.0%, Cr0.20%,
Ti0.30%, impurity≤0.15%, balance of Al, as shown in Fig. 2 in the present invention aluminum alloy extrusion section bar metallographic structure crystal grain
Fine uniform, the content of Si, makes Si that Mg is formed in aluminium alloy in remote unconventional 6 line aluminium alloy of content of Si2It is remaining big after Si
Between crystal grain, the crocking resistance to section bar is greatly improved amount list Si Dispersed precipitates.
A kind of production method of aluminum alloy extrusion section bar for anti-lock braking system, it is comprised the following steps：
A, melting
By weight percentage, by chemical composition be Si4.0%, Cu0.35%, Mg1.0%, Cr0.20%,
Ti0.30%, impurity≤0.15%, the composition input smelting furnace of balance of Al, are melted under conditions of being 790 DEG C in temperature
Refining, is transferred to refining furnace again after melting, refining agent is added by 2kg/T, and 20min is refined under conditions of being 770 DEG C in temperature, obtains essence
Aluminium liquid after refining；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 10kg, quiet under conditions of temperature is for 770 DEG C
20min is put, getter degassing and purifying is recycled, getter rotating speed in more than 450r/min, protect by the flow that getter is passed through argon gas
Hold in 1.85m3/ h, obtains the aluminium liquid after degasification；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, then temperature be 800 DEG C, casting speed be
Cast using hot top mode under conditions of 80mm/min, obtained after being cooled down under conditions of cooling water inflow is 110L/min
Casting rod；
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, and homogenization temperature is 555 DEG C, and homogenization time is 8h, so
More than strong wind chilling 2.5h or more than water-cooled 0.5h afterwards, then casting rod is sawed into scale rod, driving skin of going forward side by side, after being processed
Casting rod；
E, extruding
The casting rod after the processing is extruded with extrusion die by the extruder of 6000t, in extrusion process, institute
It is 470 DEG C to state the heating-up temperature of extrusion die, and the heating-up temperature of the casting rod after the processing is 530 DEG C, and outlet temperature is 540
DEG C, extrusion speed is 6m/min, and nitrogen at room is persistently led to by the die-cushion with air-filled pore 1 with the flow velocity of 12.5L/min
Enter to the exit of the extrusion die, as shown in figure 1, the die-cushion is provided with matching with the outlet of the extrusion die
Die-cushion is exported, and the die-cushion outlet is included near the nitrogen concentration zones 2 of the extrusion die and the material away from the extrusion die
Material outlet area 3, the width of the width less than the nitrogen concentration zones 2 in the material outlet area 3, the air-filled pore 1 and the nitrogen
Gas concentration zones 2 connect, while perforate is used to be fixed together on mould and die-cushion on die-cushion, are extruded after extrusion process
The material for going out；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, in the water outlet simultaneously up and down of the material for squeezing out,
Two outlet on top and bottom amount is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps uniform cooling, is cooled to room temperature, finally carries out
Artificial aging, aging temp is 180 DEG C, carries out time of artificial aging for 10h, is finally obtained described for automobile anti-lock braking
The aluminum alloy extrusion section bar of brake system.
Embodiment 3
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surface roughness≤10 μm, with weight
Amount percentages, it is made up of each raw material of following content：Si3.0%, Cu0.22%, Mg0.9%, Cr0.12%,
Ti0.22%, impurity≤0.15%, balance of Al, as shown in Fig. 2 in the present invention aluminum alloy extrusion section bar metallographic structure crystal grain
Fine uniform, the content of Si, makes Si that Mg is formed in aluminium alloy in remote unconventional 6 line aluminium alloy of content of Si2It is remaining big after Si
Between crystal grain, the crocking resistance to section bar is greatly improved amount list Si Dispersed precipitates.
A kind of production method of aluminum alloy extrusion section bar for anti-lock braking system, it is comprised the following steps：
A, melting
By weight percentage, by chemical composition be Si3.0%, Cu0.22%, Mg0.9%, Cr0.12%,
Ti0.22%, impurity≤0.15%, the composition input smelting furnace of balance of Al, are melted under conditions of being 765 DEG C in temperature
Refining, is transferred to refining furnace again after melting, refining agent is added by 2kg/T, and 20min is refined under conditions of being 755 DEG C in temperature, obtains essence
Aluminium liquid after refining；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 9kg, is stood under conditions of being 755 DEG C in temperature
20min, recycles getter degassing and purifying, and in more than 450r/min, the flow that getter is passed through argon gas keeps getter rotating speed
In 1.45m3/ h, obtains the aluminium liquid after degasification；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, then temperature be 785 DEG C, casting speed be
Cast using hot top mode under conditions of 75mm/min, obtained after being cooled down under conditions of cooling water inflow is 105L/min
Casting rod；
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, and homogenization temperature is 542 DEG C, and homogenization time is 8h, so
More than strong wind chilling 2.5h or more than water-cooled 0.5h afterwards, then casting rod is sawed into scale rod, driving skin of going forward side by side, after being processed
Casting rod；
E, extruding
The casting rod after the processing is extruded with extrusion die by the extruder of 6000t, in extrusion process, institute
It is 450 DEG C to state the heating-up temperature of extrusion die, and the heating-up temperature of the casting rod after the processing is 510 DEG C, and outlet temperature is 520
DEG C, extrusion speed is 5m/min, and nitrogen at room is continually fed into by the die-cushion with air-filled pore 1 with the flow velocity of 20L/min
To the exit of the extrusion die, as shown in figure 1, the die-cushion is provided with the mould matched with the outlet of the extrusion die
Get mouth discard, the die-cushion outlet is included near the nitrogen concentration zones 2 of the extrusion die and the material away from the extrusion die
Outlet area 3, the width of the width less than the nitrogen concentration zones 2 in the material outlet area 3, the air-filled pore 1 and the nitrogen
Concentration zones 2 connect, while perforate is used to be fixed together on mould and die-cushion on die-cushion, are squeezed out after extrusion process
Material；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, in the water outlet simultaneously up and down of the material for squeezing out,
Two outlet on top and bottom amount is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps uniform cooling, is cooled to room temperature, finally carries out
Artificial aging, aging temp is 175 DEG C, carries out time of artificial aging for 8.5h, is finally obtained described antilock for automobile
The aluminum alloy extrusion section bar of tight braking system.
Embodiment 4
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surface roughness≤10 μm, with weight
Amount percentages, it is made up of each raw material of following content：Si2.0%, Cu0.08%, Mg0.75%, Cr0.05%,
Ti0.15%, impurity≤0.15%, balance of Al, as shown in Fig. 2 in the present invention aluminum alloy extrusion section bar metallographic structure crystal grain
Fine uniform, the content of Si, makes Si that Mg is formed in aluminium alloy in remote unconventional 6 line aluminium alloy of content of Si2It is remaining big after Si
Between crystal grain, the crocking resistance to section bar is greatly improved amount list Si Dispersed precipitates.
A kind of production method of aluminum alloy extrusion section bar for anti-lock braking system, it is comprised the following steps：
A, melting
By weight percentage, by chemical composition be Si2.0%, Cu0.08%, Mg0.75%, Cr0.05%,
Ti0.15%, impurity≤0.15%, the composition input smelting furnace of balance of Al, are melted under conditions of being 740 DEG C in temperature
Refining, is transferred to refining furnace again after melting, refining agent is added by 2kg/T, and 20min is refined under conditions of being 740 DEG C in temperature, obtains essence
Aluminium liquid after refining；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 8kg, is stood under conditions of being 740 DEG C in temperature
20min, recycles getter degassing and purifying, and in more than 450r/min, the flow that getter is passed through argon gas keeps getter rotating speed
In 1.0m3/ h, obtains the aluminium liquid after degasification；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, then temperature be 770 DEG C, casting speed be
Cast using hot top mode under conditions of 70mm/min, obtained after being cooled down under conditions of cooling water inflow is 100L/min
Casting rod；
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, and homogenization temperature is 530 DEG C, and homogenization time is 8h, so
More than strong wind chilling 2.5h or more than water-cooled 0.5h afterwards, then casting rod is sawed into scale rod, driving skin of going forward side by side, after being processed
Casting rod；
E, extruding
The casting rod after the processing is extruded with extrusion die by the extruder of 6000t, in extrusion process, institute
It is 430 DEG C to state the heating-up temperature of extrusion die, and the heating-up temperature of the casting rod after the processing is 490 DEG C, and outlet temperature is 500
DEG C, extrusion speed is 4m/min, and nitrogen at room is continually fed into by the die-cushion with air-filled pore 1 with the flow velocity of 5L/min
The exit of the extrusion die, as shown in figure 1, the die-cushion is provided with the die-cushion matched with the outlet of the extrusion die
Outlet, the die-cushion outlet includes going out with the material away from the extrusion die near the nitrogen concentration zones 2 of the extrusion die
Mouth region 3, the width of the width less than the nitrogen concentration zones 2 in the material outlet area 3, the air-filled pore 1 and the nitrogen collection
Middle area 2 connects, while perforate is used to be fixed together on mould and die-cushion on die-cushion, is squeezed out after extrusion process
Material；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, in the water outlet simultaneously up and down of the material for squeezing out,
Two outlet on top and bottom amount is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps uniform cooling, is cooled to room temperature, finally carries out
Artificial aging, aging temp is 170 DEG C, carries out time of artificial aging for 7h, is finally obtained described for automobile anti-lock braking
The aluminum alloy extrusion section bar of brake system.
Embodiment 5
The aluminum alloy extrusion section bar for anti-lock braking system that the embodiment of the present invention 1,2,3,4 is produced with make
The aluminum alloy extrusion section bar made of conventional 6 line aluminium alloy materials carries out the contrast test of mechanical property, and result of the test is as follows：
As seen from the above table, the mechanical property ratio of the aluminum alloy extrusion section bar of anti-lock braking system is used in the present invention
The aluminum alloy extrusion section bar that conventional 6 line aluminium alloy materials make is higher by more than 30%, i.e., its with preferable processing characteristics and
While corrosion resistance, also with good intensity and mechanical property.
Nitrogen is not passed through in process of production to the embodiment of the present invention 1,2,3,4 respectively to be tried with the situation for being passed through nitrogen
Test, result of the test is as follows：
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (9)
1. a kind of aluminum alloy extrusion section bar for anti-lock braking system, it is characterised in that its surface roughness≤
10 μm, by weight percentage, it is made up of each raw material of following content：Si2.0%-4.0%, Cu 0.08%-0.35%,
Mg 0.75%-1.0%, Cr 0.05%-0.20%, T i0.15%-0.30%, impurity≤0.15%, balance of Al；
Its production method is comprised the following steps：
A, melting
By weight percentage, it is Si 2.0%-4.0%, Cu 0.08%-0.35%, Mg0.75%- by chemical composition
1.0%th, the composition input melting of Cr 0.05%-0.20%, Ti 0.15%-0.30%, impurity≤0.15%, balance of Al
Stove, melting is carried out under conditions of being 740-790 DEG C in temperature, is transferred to refining furnace after melting again, and refining agent is added by 2kg/T,
Temperature be 740-770 DEG C under conditions of refine 20min, the aluminium liquid after being refined；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 8-10kg,
20min is stood under conditions of being 740-770 DEG C in temperature, getter degassing and purifying is recycled, the aluminium liquid after degasification is obtained；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, using heat under conditions of being then 770-800 DEG C in temperature
Top mode is cast, and casting rod is obtained after cooling；
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, then cools down, then casting rod is sawed into scale rod, driving of going forward side by side
Skin, the casting rod after being processed；
E, extruding
The casting rod after the processing is extruded with extrusion die by extruder, exit during extruding in extrusion die is held
It is continuous to be passed through nitrogen at room, the material for being squeezed out, during extruding nitrogen at room by the die-cushion with air-filled pore (1) with 5-20L/
The flow velocity of min is continually fed into the exit of the extrusion die, and the die-cushion is provided with the outlet phase with the extrusion die
The die-cushion outlet of matching, the die-cushion outlet is included near the nitrogen concentration zones (2) of the extrusion die and away from the extruding
The material outlet area (3) of mould, the width of the width less than the nitrogen concentration zones (2) of the material outlet area (3) is described to fill
Stomata (1) is connected with the nitrogen concentration zones (2)；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, room temperature is cooled to, artificial aging is finally carried out, that is, obtains described use
In the aluminum alloy extrusion section bar of anti-lock braking system.
2. the production method of a kind of aluminum alloy extrusion section bar for anti-lock braking system, it is characterised in that it includes
Following steps：
A, melting
By weight percentage, it is Si 2.0%-4.0%, Cu 0.08%-0.35%, Mg0.75%- by chemical composition
1.0%th, the composition input melting of Cr 0.05%-0.20%, Ti 0.15%-0.30%, impurity≤0.15%, balance of Al
Stove, melting is carried out under conditions of being 740-790 DEG C in temperature, is transferred to refining furnace after melting again, and refining agent is added by 2kg/T,
Temperature be 740-770 DEG C under conditions of refine 20min, the aluminium liquid after being refined；
B, standing and degasification
Aluminium liquid surface after the refining is uniformly sprinkled into the common covertures of 8-10kg,
20min is stood under conditions of being 740-770 DEG C in temperature, getter degassing and purifying is recycled, the aluminium liquid after degasification is obtained；
C, filtering and casting
The aluminium liquid after the degasification is filtered using Rose Box, using heat under conditions of being then 770-800 DEG C in temperature
Top mode is cast, and casting rod is obtained after cooling；
D, Homogenization Treatments and sawing
Casting rod is transferred into homogenization stove carries out Homogenization Treatments, then cools down, then casting rod is sawed into scale rod, driving of going forward side by side
Skin, the casting rod after being processed；
E, extruding
The casting rod after the processing is extruded with extrusion die by extruder, exit during extruding in extrusion die is held
It is continuous to be passed through nitrogen at room, the material for being squeezed out, during extruding nitrogen at room by the die-cushion with air-filled pore (1) with 5-20L/
The flow velocity of min is continually fed into the exit of the extrusion die, and the die-cushion is provided with the outlet phase with the extrusion die
The die-cushion outlet of matching, the die-cushion outlet is included near the nitrogen concentration zones (2) of the extrusion die and away from the extruding
The material outlet area (3) of mould, the width of the width less than the nitrogen concentration zones (2) of the material outlet area (3) is described to fill
Stomata (1) is connected with the nitrogen concentration zones (2)；
F, water-cooled and timeliness
Online water-cooled is carried out to the material for squeezing out, room temperature is cooled to, artificial aging is finally carried out, that is, obtains described use
In the aluminum alloy extrusion section bar of anti-lock braking system.
3. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
It is characterised by, in stepb, during degasification, in more than 450r/min, the flow that getter is passed through argon gas is maintained at getter rotating speed
1.0-1.85m3/h。
4. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
It is characterised by, in step C, in casting process, casting speed is 70-80mm/min, cooling water inflow is 100- during cooling
110L/min。
5. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
It is characterised by, in step D, during Homogenization Treatments, homogenization temperature is 530-555 DEG C, and homogenization time is 8h.
6. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
It is characterised by, in step D, the type of cooling is more than strong wind chilling 2.5h or more than water-cooled 0.5h.
7. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
It is characterised by, in step E, the specification of the extruder is 6000t, in extrusion process, the heating temperature of the extrusion die
It is 430-470 DEG C to spend, and the heating-up temperature of the casting rod after the processing is 490-530 DEG C, and outlet temperature is 500-540 DEG C, extruding
Speed is 4-6m/min.
8. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
Be characterised by, in step F, when online water-cooled is carried out, the material for squeezing out up and down simultaneously water outlet, up and down
Water yield is respectively 60m3/ h, left and right water yield is respectively 30m3/ h, keeps uniform cooling.
9. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, its
It is characterised by, in step F, carry out the temperature of artificial aging for 170-180 DEG C, the time for carrying out artificial aging is 7-10h.
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Denomination of invention: Aluminum alloy extruded profile for automobile anti lock braking system and its production method Effective date of registration: 20211111 Granted publication date: 20170524 Pledgee: Longkou Conglin Machinery Manufacturing Co.,Ltd. Pledgor: SHANDONG NOLLVETEC LIGHTWEIGHT EQUIPMENT CO.,LTD. Registration number: Y2021980012229 |
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Date of cancellation: 20211228 Granted publication date: 20170524 Pledgee: Longkou Conglin Machinery Manufacturing Co.,Ltd. Pledgor: SHANDONG NOLLVETEC LIGHTWEIGHT EQUIPMENT CO.,LTD. Registration number: Y2021980012229 |