CN104988367A - 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 131
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 73
- 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 84
- 238000005266 casting Methods 0.000 claims abstract description 72
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 42
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 36
- 238000007872 degassing Methods 0.000 claims abstract description 33
- 238000000265 homogenisation Methods 0.000 claims abstract description 33
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 230000032683 aging Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 45
- 238000007670 refining Methods 0.000 claims description 36
- 239000004411 aluminium Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 28
- 238000002844 melting Methods 0.000 claims description 21
- 230000008018 melting Effects 0.000 claims description 21
- 238000011282 treatment Methods 0.000 claims description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000005273 aeration Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- -1 Mg0.75%-1.0% Substances 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 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
- 230000003746 surface roughness Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 19
- 230000009286 beneficial effect Effects 0.000 description 10
- 239000000956 alloy Substances 0.000 description 8
- 239000002244 precipitate Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003628 erosive effect Effects 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000003245 working effect Effects 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
The present invention relates to aluminum alloy extrusion section bar field, particularly relate to a kind of aluminum alloy extrusion section bar for anti-lock braking system and production method thereof.
Background technology
Along with the fast development of automobile industry, the security requirement of human consumer to automobile is more and more higher, anti-lock braking system (ABS) is widely applied in the middle of automobile making as sure brake system, ABS has the effect of anti-lock, anti-sideslip, by electronic sensor and oil pressure cntrol, the brake condition to automobile regulates, and effectively improves the security of automobile; Because the importance (security system) of the singularity of its Working environment (oil pressure cntrol) and its function, so require stricter as each side such as performance, intensity, tissue of the main structural component material of ABS system.
Al-Zn-Mg system (7 are) aluminium alloy has higher mechanical property and intensity, but its corrosion resistance nature and processing characteristics poor, although Al-Mg-Si system alloy has good corrosion resistance nature and processing characteristics, but its mechanical property and intensity poor, the difficulty considering Al-Zn-Mg line aluminium alloy raising corrosion resistance nature and processing characteristics aspect is higher than Al-Mg-Si-type aluminum alloy and improves mechanical property and intensity, visible Al-Mg-Si system alloy is more suitable for the main structural component material as ABS system, but the intensity of current conventional Al-Mg-Si system alloy and grain structure all cannot reach the requirement of product, therefore, the intensity and the grain structure that how to improve Al-Mg-Si system alloy become key.The surface quality requirements of the main structural component of ABS system is strict, and as high temperature extrusion section bar, obviously, the surface quality how improving section bar is most important in surface oxidation wearing and tearing.
Accompanying drawing explanation
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:
1, aeration aperture, 2, nitrogen concentration zones, 3, material outlet district.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of intensity is high, mechanical property good, good, the corrosion resistant aluminum alloy extrusion section bar for anti-lock braking system of good processability, surface quality and production method thereof.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surfaceness≤10 μm, by weight percentage, it is made up of each raw material of following content: Si2.0%-4.0%, Cu0.08%-0.35%, Mg0.75%-1.0%, Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, and surplus is Al.
Compared with prior art, the invention has the beneficial effects as follows:
Si content in aluminum alloy extrusion section bar controls to control at 0.08%-0.35% at 2.0%-4.0%, Cu content by the present invention, and wherein the content of Si in far unconventional 6 line aluminium alloys of the content of Si, makes Si form Mg in aluminium alloy
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved, Ti constituent content is controlled at 0.15%-0.30% simultaneously, ensure that it fully dissolves, can crystal grain thinning effectively, improve crystalline-granular texture, can ensure that aluminum alloy extrusion section bar is while having good processing characteristics and erosion resistance, also has good intensity and mechanical property like this.
Because ABS carries out work by oil pressure cntrol, for guaranteeing the work-ing life of ABS, the mechanical property of ABS section bar, hardness and crocking resistance require higher, and for this problem, the present invention makes Si form Mg in aluminium alloy by the content significantly improving Si
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved, also have raising in various degree to the performance of product and hardness.
Because the requirement of the Working environment of oil pressure cntrol, ABS section bar also has higher requirement for grain structure, crystal grain is less, organize finer and close, the probability that ABS breaks down is lower, the present invention passes through the significantly Ti content (content in super general wrought aluminium alloy far away) improved in alloy and reaches the effect of crystal grain thinning, improve more than casting temp to 770 DEG C simultaneously, while abundant dissolving Ti alloy, high temperature casting also can the crystal grain of effective refinement, the effect of high temperature casting crystal grain thinning is even higher than the effect increasing Ti content crystal grain thinning, structures shape performance simultaneously, after grain refining, mechanical property and hardness also improve.
ABS section bar multiple face in the course of processing does not process; if surface quality is poor; impact processed for client larger; and the Surface of profile quality of high temperature extruding forming is generally not as other cold-formed section bars; for guaranteeing its surface quality; the present invention adopts during extruding leads to nitrogen in the exit of mould, avoids section bar to be oxidized in exit, the surface quality of available protecting section bar.
For a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it comprises the following steps:
A, melting
By weight percentage, be Si2.0%-4.0%, Cu0.08%-0.35% by chemical composition, Mg0.75%-1.0%, Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, surplus be that the composition of Al drops into smelting furnace, be carry out melting under the condition of 740-790 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 740-770 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 8-10kg, is to leave standstill 20min under the condition of 740-770 DEG C in temperature, and recycling getter degassing and purifying, obtains the aluminium liquid after degasification;
C, filtration and casting
Use strumbox to filter the aluminium liquid after described degasification, be then adopt hot top mode to cast under the condition of 770-800 DEG C in temperature, after cooling, namely obtain casting rod;
D, Homogenization Treatments and sawing
Casting rod is proceeded to even stove and carry out Homogenization Treatments, then cool, then casting rod sawing is become scale rod, driving skin of going forward side by side, obtain the casting rod after processing;
E, extruding
By extrusion machine and extrusion mould, the casting rod after described processing is extruded, continue to pass into nitrogen at room in the exit of extrusion mould during extruding, obtain the material squeezed out;
F, water-cooled and timeliness
Online water-cooled is carried out to the described material squeezed out, is cooled to room temperature, finally carry out artificial aging, namely obtain the described aluminum alloy extrusion section bar for anti-lock braking system.
Compared with prior art, the invention has the beneficial effects as follows:
Si content in section bar controls at 2.0%-4.0% by the present invention, Cu content controls to control at 0.15%-0.30% at 0.08%-0.35%, Ti constituent content, controls at 740-790 DEG C by smelting temperature simultaneously, casting temp controls at 770-800 DEG C, makes Si form Mg in aluminium alloy
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved, ensure that Ti element is fully dissolved simultaneously, effectively improve the crystalline-granular texture of aluminum alloy materials, make crystal structure more evenly tiny, ensure that aluminum alloy extrusion section bar is while having good processing characteristics and erosion resistance, also there is good intensity and mechanical property general; Simultaneously, the present invention passes into nitrogen at room in extrusion mould exit, the environment of anoxic, anaerobic is formed at mould outlet place, ingress of air when avoiding high temperature aluminum section bar to extrude from mould outlet and be oxidized formed Alumina build-up at mould outlet place, and then avoid the mould being attached with aluminum oxide to scratch the Surface of profile of subsequent extrusion, ensure the visual appearance of section bar.
As a kind of preferred implementation of the present invention, in stepb, during degasification, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.0-1.85m
3/ h.
The beneficial effect of above-mentioned preferred version is adopted to be: to adopt the degasification of rare gas element argon gas, and ensure that getter rotating speed is at more than 450r/min, can reach better degassing and purifying effects.
As another kind of preferred implementation of the present invention, in step C, in castingprocesses, casting speed is 70-80mm/min, and during cooling, cooling water inflow is 100-110L/min.
Adopt the beneficial effect of above-mentioned preferred version to be: control casting speed is 70-80mm/min, and during cooling, cooling water inflow is 100-110L/min, can ensure the casting rod quality obtained, the speed of casting can be ensured again.
As another kind of preferred implementation of the present invention in step D, in Homogenization Treatments process, homogenization temperature is 530-555 DEG C, and homogenization time is 8h.
The beneficial effect of above-mentioned preferred version is adopted to be: when being controlled between 530-555 DEG C by homogenization temperature, effectively can eliminate the segregation of the main component such as Si, Mg, Cu in aluminium alloy extrusions, the thick crystallisate formed in the castingprocesses of refinement simultaneously, improve toughness and the yield strength of material, and reduce the racking stress of material.
As another kind of preferred implementation of the present invention, in step D, the type of cooling is strong wind more than chilling 2.5h or water-cooled more than 0.5h.
The beneficial effect of above-mentioned preferred version is adopted to be: to ensure that casting rod can complete process for cooling better faster after Homogenization Treatments.
As another kind of preferred implementation of the present invention, in step e, the specification of described extrusion machine is 6000t, in extrusion process, the Heating temperature of described extrusion mould is 430-470 DEG C, the Heating temperature of the casting rod after described processing is 490-530 DEG C, and temperature out is 500-540 DEG C, and extrusion speed is 4-6m/min.
The beneficial effect of above-mentioned preferred version is adopted to be: can effectively reduce extruding drag when the heating and temperature control of casting rod is between 490-530 DEG C, good mechanical property can be ensured again; Die temperature controls, between 430-470 DEG C, both can avoid because die temperature is too low, and the squeeze pressure caused to be large, it is slow that product extrusion speed plays speed, and the problems such as material property is influenced, can avoid again because die temperature is too high, and the mould caused easily is annealed, the problems such as reduction die life; Extrusion speed controls between 4-6m/min, and the product edges and corners of causing because of excessive velocities both can have been avoided easily to occur the problem of crackle, can avoid again the promptness causing ensureing temperature out and quenching because speed crosses slowly; And ensure that temperature out is 500-540 DEG C and better can ensures the validity that product quenches.
As another kind of preferred implementation of the present invention, in step e, nitrogen at room continues with the flow velocity of 5-20L/min the exit being passed into described extrusion mould by the die-cushion with aeration aperture, described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises the nitrogen concentration zones near described extrusion mould and the material outlet district away from described extrusion mould, the width in described material outlet district is less than the width of described nitrogen concentration zones, and described aeration aperture is communicated with described nitrogen concentration zones.
The beneficial effect of above-mentioned preferred version is adopted to be: nitrogen at room continues to be passed into the exit of extrusion mould with the flow velocity of 5-20L/min by the die-cushion with aeration aperture, and the width in material outlet district is less than the width of nitrogen concentration zones, nitrogen can be made more easily to be full of nitrogen concentration zones, to ensure the stability of nitrogen environment.
As another kind of preferred implementation of the present invention, in step F, when carrying out online water-cooled, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keeps Homogeneous cooling.
Adopt the beneficial effect of above-mentioned preferred version to be: to adopt cooling by water, quenching technology is water yield standard-sized sheet up and down, and the upper and lower water yield is 60m
3/ h, the left and right water yield is 30m
3/ h, can either ensure the hardening capacity of quenching, can obtain higher mechanical property and intensity again.
As another kind of preferred implementation of the present invention, in step F, carrying out artificially aged temperature is 170-180 DEG C, and carrying out the artificially aged time is 7-10h.
The beneficial effect of above-mentioned preferred version is adopted to be: artificially aged temperature is between 170-180 DEG C, carry out artificially aged 7-10 hour, the aluminium alloy supersaturated solid solution decomposition that can be formed after can better impelling quenching is also dispersed, improve material property, abundant elimination section bar internal stress, improves tensile strength and the yield strength of product further.
Below the present invention is described in further details.
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surfaceness≤10 μm, by weight percentage, it is made up of each raw material of following content: Si2.0%-4.0%, Cu0.08%-0.35%, Mg0.75%-1.0%, Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, and surplus is Al.
In the present invention, Fe is impurity, and be easily combined with Al, Si and form Al-Fe-Si based compound, easy fracture, toughness of material is reduced, and therefore, the content of Fe should control below 0.15%.
For a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it comprises the following steps:
A, melting
By weight percentage, be Si2.0%-4.0%, Cu0.08%-0.35% by chemical composition, Mg0.75%-1.0%, Cr0.05%-0.20%, Ti0.15%-0.30%, impurity≤0.15%, surplus be that the composition of Al drops into smelting furnace, be carry out melting under the condition of 740-790 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 740-770 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 8-10kg, be leave standstill 20min under the condition of 740-770 DEG C in temperature, recycling getter degassing and purifying, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.0-1.85m
3/ h, obtains the aluminium liquid after degasification;
C, filtration and casting
Strumbox is used to filter the aluminium liquid after described degasification, then temperature be 770-800 DEG C, casting speed adopts hot top mode to cast under being the condition of 70-80mm/min, at cooling water inflow be namely to obtain casting rod after cooling under the condition of 100-110L/min;
In the present invention, Ti element has the effect of crystal grain thinning, the content of suitable increase Ti element, can crystal grain thinning effectively, improve crystalline-granular texture, and the casting temp of usual 6 line aluminium alloys is between 700-750 DEG C, but the fusing point of Ti is higher, significantly increases the content of Ti, Ti cannot fully dissolve, and easily forms AL
3the thick crystal of Ti, worsen product tissue, and when casting temp is more than 750 DEG C, under overheat condition, crystal grain is easily grown up, cause tissue deterioration, therefore, the present invention is ensureing that smelting temperature is at 740-790 DEG C, casting temp is while 770-800 DEG C, significantly improve Ti constituent content, control Ti constituent content is at 0.15%-0.30%, such Ti element just can fully be dissolved, because melt crystallization relies on polyphase structure particle to be that crystallization particle carries out crystallization, when a small amount of overheated time, during as 750-770 DEG C, polyphase structure can dissolve or active reduction, crystallization particle reduces, grain growth will inevitably be caused, and when temperature is elevated to a specified temp further, namely during 770-800 DEG C, the increase of condensate depression can cause melt to depart from polyphase structure particle and spontaneous crystallization, therefore crystal structure is more evenly tiny, effectively improve grain structure, also improve intensity and the corrosion resistance nature of material simultaneously.
D, Homogenization Treatments and sawing
Casting rod is proceeded to homogenizing stove and carry out Homogenization Treatments, homogenization temperature is 530-555 DEG C, and homogenization time is 8h, then strong wind more than chilling 2.5h or water-cooled more than 0.5h, then casting rod sawing is become scale rod, driving skin of going forward side by side, and obtains the casting rod after processing;
E, extruding
By the extrusion machine of 6000t and extrusion mould, the casting rod after described processing is extruded, in extrusion process, the Heating temperature of described extrusion mould is 430-470 DEG C, the Heating temperature of the casting rod after described processing is 490-530 DEG C, temperature out is 500-540 DEG C, extrusion speed is 4-6m/min, and nitrogen at room is continued with the flow velocity of 5-20L/min the exit being passed into described extrusion mould by the die-cushion with aeration aperture, described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises the nitrogen concentration zones near described extrusion mould and the material outlet district away from described extrusion mould, the width in described material outlet district is less than the width of described nitrogen concentration zones, described aeration aperture is communicated with described nitrogen concentration zones, on die-cushion, perforate is used for mould and die-cushion to be fixed together simultaneously, the material squeezed out is obtained after extrusion process,
F, water-cooled and timeliness
Carry out online water-cooled to the described material squeezed out, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keep Homogeneous cooling, be cooled to room temperature, finally carry out artificial aging, aging temp is 170-180 DEG C, and carrying out the artificially aged time is 7-10h, finally obtains the described aluminum alloy extrusion section bar for anti-lock braking system.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surfaceness≤10 μm, by weight percentage, it is made up of each raw material of following content: Si2.5%, Cu0.15%, Mg0.8%, Cr0.1%, Ti0.2%, impurity≤0.15%, surplus is Al, as shown in Figure 2, and the metallographic structure uniform small grains of aluminum alloy extrusion section bar in the present invention, in far unconventional 6 line aluminium alloys of content of Si, the content of Si, makes Si form Mg in aluminium alloy
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved.
For a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it comprises the following steps:
A, melting
By weight percentage, be Si2.5%, Cu0.15% by chemical composition, Mg0.8%, Cr0.1%, Ti0.2%, impurity≤0.15%, surplus be that the composition of Al drops into smelting furnace, be carry out melting under the condition of 750 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 740 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 8kg, is to leave standstill 20min under the condition of 740 DEG C in temperature, and recycling getter degassing and purifying, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.0m
3/ h, obtains the aluminium liquid after degasification;
C, filtration and casting
Use strumbox to filter the aluminium liquid after described degasification, then temperature be 770 DEG C, casting speed adopts hot top mode to cast under being the condition of 70mm/min, at cooling water inflow be namely to obtain casting rod after cooling under the condition of 100L/min;
D, Homogenization Treatments and sawing
Casting rod is proceeded to homogenizing stove and carry out Homogenization Treatments, homogenization temperature is 530 DEG C, and homogenization time is 8h, then strong wind more than chilling 2.5h or water-cooled more than 0.5h, then casting rod sawing is become scale rod, driving skin of going forward side by side, and obtains the casting rod after processing;
E, extruding
By the extrusion machine of 6000t and extrusion mould, the casting rod after described processing is extruded, in extrusion process, the Heating temperature of described extrusion mould is 430 DEG C, the Heating temperature of the casting rod after described processing is 490 DEG C, temperature out is 500 DEG C, extrusion speed is 4m/min, and nitrogen at room is continued with the flow velocity of 5L/min the exit being passed into described extrusion mould by the die-cushion with aeration aperture 1, as shown in Figure 1, described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises near the nitrogen concentration zones 2 of described extrusion mould and the material outlet district 3 away from described extrusion mould, the width in described material outlet district 3 is less than the width of described nitrogen concentration zones 2, described aeration aperture 1 is communicated with described nitrogen concentration zones 2, on die-cushion, perforate is used for mould and die-cushion to be fixed together simultaneously, the material squeezed out is obtained after extrusion process,
F, water-cooled and timeliness
Carry out online water-cooled to the described material squeezed out, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keep Homogeneous cooling, be cooled to room temperature, finally carry out artificial aging, aging temp is 170 DEG C, and carrying out the artificially aged time is 7h, finally obtains the described aluminum alloy extrusion section bar for anti-lock braking system.
Embodiment 2
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surfaceness≤10 μm, by weight percentage, it is made up of each raw material of following content: Si4.0%, Cu0.35%, Mg1.0%, Cr0.20%, Ti0.30%, impurity≤0.15%, surplus is Al, as shown in Figure 2, and the metallographic structure uniform small grains of aluminum alloy extrusion section bar in the present invention, in far unconventional 6 line aluminium alloys of content of Si, the content of Si, makes Si form Mg in aluminium alloy
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved.
For a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it comprises the following steps:
A, melting
By weight percentage, be Si4.0%, Cu0.35% by chemical composition, Mg1.0%, Cr0.20%, Ti0.30%, impurity≤0.15%, surplus be that the composition of Al drops into smelting furnace, be carry out melting under the condition of 790 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 770 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 10kg, is to leave standstill 20min under the condition of 770 DEG C in temperature, and recycling getter degassing and purifying, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.85m
3/ h, obtains the aluminium liquid after degasification;
C, filtration and casting
Use strumbox to filter the aluminium liquid after described degasification, then temperature be 800 DEG C, casting speed adopts hot top mode to cast under being the condition of 80mm/min, at cooling water inflow be namely to obtain casting rod after cooling under the condition of 110L/min;
D, Homogenization Treatments and sawing
Casting rod is proceeded to homogenizing stove and carry out Homogenization Treatments, homogenization temperature is 555 DEG C, and homogenization time is 8h, then strong wind more than chilling 2.5h or water-cooled more than 0.5h, then casting rod sawing is become scale rod, driving skin of going forward side by side, and obtains the casting rod after processing;
E, extruding
By the extrusion machine of 6000t and extrusion mould, the casting rod after described processing is extruded, in extrusion process, the Heating temperature of described extrusion mould is 470 DEG C, the Heating temperature of the casting rod after described processing is 530 DEG C, temperature out is 540 DEG C, extrusion speed is 6m/min, and nitrogen at room is continued with the flow velocity of 12.5L/min the exit being passed into described extrusion mould by the die-cushion with aeration aperture 1, as shown in Figure 1, described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises near the nitrogen concentration zones 2 of described extrusion mould and the material outlet district 3 away from described extrusion mould, the width in described material outlet district 3 is less than the width of described nitrogen concentration zones 2, described aeration aperture 1 is communicated with described nitrogen concentration zones 2, on die-cushion, perforate is used for mould and die-cushion to be fixed together simultaneously, the material squeezed out is obtained after extrusion process,
F, water-cooled and timeliness
Carry out online water-cooled to the described material squeezed out, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keep Homogeneous cooling, be cooled to room temperature, finally carry out artificial aging, aging temp is 180 DEG C, and carrying out the artificially aged time is 10h, finally obtains the described aluminum alloy extrusion section bar for anti-lock braking system.
Embodiment 3
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surfaceness≤10 μm, by weight percentage, it is made up of each raw material of following content: Si3.0%, Cu0.22%, Mg0.9%, Cr0.12%, Ti0.22%, impurity≤0.15%, surplus is Al, as shown in Figure 2, and the metallographic structure uniform small grains of aluminum alloy extrusion section bar in the present invention, in far unconventional 6 line aluminium alloys of content of Si, the content of Si, makes Si form Mg in aluminium alloy
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved.
For a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it comprises the following steps:
A, melting
By weight percentage, be Si3.0%, Cu0.22% by chemical composition, Mg0.9%, Cr0.12%, Ti0.22%, impurity≤0.15%, surplus be that the composition of Al drops into smelting furnace, be carry out melting under the condition of 765 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 755 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 9kg, is to leave standstill 20min under the condition of 755 DEG C in temperature, and recycling getter degassing and purifying, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.45m
3/ h, obtains the aluminium liquid after degasification;
C, filtration and casting
Use strumbox to filter the aluminium liquid after described degasification, then temperature be 785 DEG C, casting speed adopts hot top mode to cast under being the condition of 75mm/min, at cooling water inflow be namely to obtain casting rod after cooling under the condition of 105L/min;
D, Homogenization Treatments and sawing
Casting rod is proceeded to homogenizing stove and carry out Homogenization Treatments, homogenization temperature is 542 DEG C, and homogenization time is 8h, then strong wind more than chilling 2.5h or water-cooled more than 0.5h, then casting rod sawing is become scale rod, driving skin of going forward side by side, and obtains the casting rod after processing;
E, extruding
By the extrusion machine of 6000t and extrusion mould, the casting rod after described processing is extruded, in extrusion process, the Heating temperature of described extrusion mould is 450 DEG C, the Heating temperature of the casting rod after described processing is 510 DEG C, temperature out is 520 DEG C, extrusion speed is 5m/min, and nitrogen at room is continued with the flow velocity of 20L/min the exit being passed into described extrusion mould by the die-cushion with aeration aperture 1, as shown in Figure 1, described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises near the nitrogen concentration zones 2 of described extrusion mould and the material outlet district 3 away from described extrusion mould, the width in described material outlet district 3 is less than the width of described nitrogen concentration zones 2, described aeration aperture 1 is communicated with described nitrogen concentration zones 2, on die-cushion, perforate is used for mould and die-cushion to be fixed together simultaneously, the material squeezed out is obtained after extrusion process,
F, water-cooled and timeliness
Carry out online water-cooled to the described material squeezed out, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keep Homogeneous cooling, be cooled to room temperature, finally carry out artificial aging, aging temp is 175 DEG C, and carrying out the artificially aged time is 8.5h, finally obtains the described aluminum alloy extrusion section bar for anti-lock braking system.
Embodiment 4
A kind of aluminum alloy extrusion section bar for anti-lock braking system, its surfaceness≤10 μm, by weight percentage, it is made up of each raw material of following content: Si2.0%, Cu0.08%, Mg0.75%, Cr0.05%, Ti0.15%, impurity≤0.15%, surplus is Al, as shown in Figure 2, and the metallographic structure uniform small grains of aluminum alloy extrusion section bar in the present invention, in far unconventional 6 line aluminium alloys of content of Si, the content of Si, makes Si form Mg in aluminium alloy
2after Si, remain a large amount of single Si Dispersed precipitate between crystal grain, the crocking resistance of section bar is greatly improved.
For a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it comprises the following steps:
A, melting
By weight percentage, be Si2.0%, Cu0.08% by chemical composition, Mg0.75%, Cr0.05%, Ti0.15%, impurity≤0.15%, surplus be that the composition of Al drops into smelting furnace, be carry out melting under the condition of 740 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 740 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 8kg, is to leave standstill 20min under the condition of 740 DEG C in temperature, and recycling getter degassing and purifying, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.0m
3/ h, obtains the aluminium liquid after degasification;
C, filtration and casting
Use strumbox to filter the aluminium liquid after described degasification, then temperature be 770 DEG C, casting speed adopts hot top mode to cast under being the condition of 70mm/min, at cooling water inflow be namely to obtain casting rod after cooling under the condition of 100L/min;
D, Homogenization Treatments and sawing
Casting rod is proceeded to homogenizing stove and carry out Homogenization Treatments, homogenization temperature is 530 DEG C, and homogenization time is 8h, then strong wind more than chilling 2.5h or water-cooled more than 0.5h, then casting rod sawing is become scale rod, driving skin of going forward side by side, and obtains the casting rod after processing;
E, extruding
By the extrusion machine of 6000t and extrusion mould, the casting rod after described processing is extruded, in extrusion process, the Heating temperature of described extrusion mould is 430 DEG C, the Heating temperature of the casting rod after described processing is 490 DEG C, temperature out is 500 DEG C, extrusion speed is 4m/min, and nitrogen at room is continued with the flow velocity of 5L/min the exit being passed into described extrusion mould by the die-cushion with aeration aperture 1, as shown in Figure 1, described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises near the nitrogen concentration zones 2 of described extrusion mould and the material outlet district 3 away from described extrusion mould, the width in described material outlet district 3 is less than the width of described nitrogen concentration zones 2, described aeration aperture 1 is communicated with described nitrogen concentration zones 2, on die-cushion, perforate is used for mould and die-cushion to be fixed together simultaneously, the material squeezed out is obtained after extrusion process,
F, water-cooled and timeliness
Carry out online water-cooled to the described material squeezed out, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keep Homogeneous cooling, be cooled to room temperature, finally carry out artificial aging, aging temp is 170 DEG C, and carrying out the artificially aged time is 7h, finally obtains the described aluminum alloy extrusion section bar for anti-lock braking system.
Embodiment 5
The aluminum alloy extrusion section bar the being used for anti-lock braking system embodiment of the present invention 1,2,3,4 produced and the aluminum alloy extrusion section bar using conventional 6 line aluminium alloy materials to make carry out the simultaneous test of mechanical property, and test-results is as follows:
As seen from the above table, the aluminum alloy extrusion section bar made than conventional 6 line aluminium alloy materials for the mechanical property of the aluminum alloy extrusion section bar of anti-lock braking system in the present invention exceeds more than 30%, namely it is while having good processing characteristics and erosion resistance, also has good intensity and mechanical property.
Do not pass into nitrogen in process of production to the embodiment of the present invention 1,2,3,4 respectively to test with the situation passing into nitrogen, test-results is as follows:
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the aluminum alloy extrusion section bar for anti-lock braking system, it is characterized in that, its surfaceness≤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%, Ti0.15%-0.30%, impurity≤0.15%, surplus is Al.
2. for a production method for the aluminum alloy extrusion section bar of anti-lock braking system, it is characterized in that, it comprises the following steps:
A, melting
By weight percentage, be Si 2.0%-4.0%, Cu 0.08%-0.35% by chemical composition, Mg0.75%-1.0%, Cr 0.05%-0.20%, Ti 0.15%-0.30%, impurity≤0.15%, surplus be that the composition of A1 drops into smelting furnace, be carry out melting under the condition of 740-790 DEG C in temperature, refining furnace is proceeded to again after melting, refining agent is added by 2kg/T, be refining 20min under the condition of 740-770 DEG C in temperature, obtain the aluminium liquid after refining;
B, standing and degasification
Aluminium liquid surface uniform after described refining is sprinkled into the common insulating covering agent of 8-10kg,
Be leave standstill 20min under the condition of 740-770 DEG C in temperature, recycling getter degassing and purifying, obtains the aluminium liquid after degasification;
C, filtration and casting
Use strumbox to filter the aluminium liquid after described degasification, be then adopt hot top mode to cast under the condition of 770-800 DEG C in temperature, after cooling, namely obtain casting rod;
D, Homogenization Treatments and sawing
Casting rod is proceeded to homogenizing stove and carry out Homogenization Treatments, then cool, then casting rod sawing is become scale rod, driving skin of going forward side by side, obtain the casting rod after processing;
E, extruding
By extrusion machine and extrusion mould, the casting rod after described processing is extruded, continue to pass into nitrogen at room in the exit of extrusion mould during extruding, obtain the material squeezed out;
F, water-cooled and timeliness
Online water-cooled is carried out to the described material squeezed out, is cooled to room temperature, finally carry out artificial aging, namely obtain the described aluminum alloy extrusion section bar for anti-lock braking system.
3. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, is characterized in that, in stepb, during degasification, getter rotating speed is at more than 450r/min, and the flow that getter passes into argon gas remains on 1.0-1.85m
3/ h.
4. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, is characterized in that, in step C, in castingprocesses, casting speed is 70-80mm/min, and during cooling, cooling water inflow is 100-110L/min.
5. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, is characterized in that, in step D, in Homogenization Treatments process, 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, is characterized in that, in step D, the type of cooling is strong wind more than chilling 2.5h or water-cooled more than 0.5h.
7. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, it is characterized in that, in step e, the specification of described extrusion machine is 6000t, in extrusion process, the Heating temperature of described extrusion mould is 430-470 DEG C, and the Heating temperature of the casting rod after described processing is 490-530 DEG C, temperature out is 500-540 DEG C, and extrusion 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, it is characterized in that, in step e, nitrogen at room is by continuing with the flow velocity of 5-20L/min the exit being passed into described extrusion mould with the die-cushion of aeration aperture (1), described die-cushion is provided with the die-cushion matched with the outlet of described extrusion mould and exports, described die-cushion outlet comprises the nitrogen concentration zones (2) near described extrusion mould and the material outlet district (3) away from described extrusion mould, the width of described material outlet district (3) is less than the width of described nitrogen concentration zones (2), described aeration aperture (1) is communicated with described nitrogen concentration zones (2).
9. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, it is characterized in that, in step F, when carrying out online water-cooled, in the water outlet simultaneously up and down of the described material squeezed out, two outlet on top and bottom amount is respectively 60m
3/ h, left and right aquifer yield is respectively 30m
3/ h, keeps Homogeneous cooling.
10. the production method of the aluminum alloy extrusion section bar for anti-lock braking system according to claim 2, is characterized in that, in step F, carrying out artificially aged temperature is 170-180 DEG C, and carrying out the artificially aged time is 7-10h.
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| CN111702413A (en) * | 2020-05-07 | 2020-09-25 | 天津英利模具制造有限公司 | Production process of lightweight automobile extruded alloy instrument panel framework |
| CN111850328A (en) * | 2020-07-14 | 2020-10-30 | 湖北华力科技有限公司 | Production and preparation process of high-strength aluminum alloy cast rod |
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| JP2001131720A (en) * | 1999-11-04 | 2001-05-15 | Nippon Light Metal Co Ltd | Aluminum alloy extruded material excellent in chip breakability, finish machinability, corrosion resistance and extrudability |
| CN103103370A (en) * | 2012-12-11 | 2013-05-15 | 龙口市丛林铝材有限公司 | Production technology of aluminum alloy sections used for brake pad |
| CN103131905A (en) * | 2013-03-06 | 2013-06-05 | 苏州有色金属研究院有限公司 | Aluminum alloy for automotive body and heat treatment method thereof |
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| JP2001131720A (en) * | 1999-11-04 | 2001-05-15 | Nippon Light Metal Co Ltd | Aluminum alloy extruded material excellent in chip breakability, finish machinability, corrosion resistance and extrudability |
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| CN111702413A (en) * | 2020-05-07 | 2020-09-25 | 天津英利模具制造有限公司 | Production process of lightweight automobile extruded alloy instrument panel framework |
| CN111850328A (en) * | 2020-07-14 | 2020-10-30 | 湖北华力科技有限公司 | Production and preparation process of high-strength aluminum alloy cast rod |
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