CN108220707A - A kind of aluminium alloy and preparation method thereof - Google Patents
A kind of aluminium alloy and preparation method thereof Download PDFInfo
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- CN108220707A CN108220707A CN201810019901.3A CN201810019901A CN108220707A CN 108220707 A CN108220707 A CN 108220707A CN 201810019901 A CN201810019901 A CN 201810019901A CN 108220707 A CN108220707 A CN 108220707A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Abstract
The invention discloses a kind of aluminium alloy and preparation method thereof, the ratio of the invention by allocating Si/Mg/Mn, opposite reduce makes Mg/Mn component ratios, improves Si component ratios, so as to ensure the integral strength of aluminium alloy, and enables aluminum alloy to have good extrusion performance.In addition, the content by reducing Fe/Cu/Zn, the corrosion resistance of aluminium alloy is improved.
Description
Technical field
The present invention relates to technical field of alloy more particularly to a kind of aluminium alloy and preparation method thereof.
Background technology
Aluminium alloy is most widely used one kind non-ferrous metal structural material in industry, since its intensity is high, light-weight, and
There is preferable electric conductivity, be widely used in the technologies such as Aeronautics and Astronautics, automobile, machine-building, ship and chemical industry neck
Domain.
At present, apply the 6351 aluminium alloy generally existing intensity in automotive field not high, be used for a long time outdoors easily by
To corrosion, durability is poor, in addition, extruding efficiency is low and of high cost, therefore hinders development of the aluminium alloy in automotive field.
Existing 6351 aluminium alloy is one kind that intensity is higher in 6 series alloys, and intensity is higher than 6061 aluminium alloys, than
6082 aluminium alloys are slightly lower.Partial Elements additive amount range is too big in existing 6351 aluminium alloy, and upper and lower bound element is difficult standard
Really control, especially extrusion forming product there are abnormal quality, be difficult to judge ingredient the problems such as, in addition, harmful in aluminium alloy
Substance and impurity are difficult to be well controlled.
Invention content
The technical problems to be solved by the invention are, a kind of aluminium alloy and preparation method thereof are provided, by allocating Si/
The ratio of Mg/Mn and the content of control Fe/Cu/Zn improve the corrosion resistance and tensile strength of aluminium alloy.
In order to solve the above technical problem, the present invention provides a kind of aluminium alloy, including following component：
The Si of 0.85~1.0wt%；
Fe more than zero and less than or equal to 0.2wt%；
Cu more than zero and less than or equal to 0.05wt%；
The Mn of 0.5~0.55wt%；
The Mg of 0.55~0.6wt%；
Zn more than zero and less than or equal to 0.1wt%；
Ti more than zero and less than or equal to 0.1wt%；
The Al of surplus.
As the improvement of said program, the Si including 0.85~0.9wt%.
As the improvement of said program, the Si including 0.95~1.0wt%.
Correspondingly, the present invention also provides a kind of preparation method of aluminium alloy, include the following steps：
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 730-760 DEG C；
S2, following raw materials are added in into foundry furnace by proportioning：The Si of 0.85~1.0wt% more than zero and is less than or equal to
The Fe of 0.2wt%, Cu, the Mg of the Mn of 0.5~0.55wt%, 0.55~0.6wt% more than zero and less than or equal to 0.05wt%,
Zn more than zero and less than or equal to 0.1wt%, the Ti more than zero and less than or equal to 0.1wt%, wherein, the component of Al for it is above-mentioned into
The surplus divided；
S3, it carries out degassing processing and refines, refining temperature is 720-750 DEG C, stands 20-40min after refining, obtains alloy
Liquid；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 85-95mm/min；
S5, aluminium alloy bars is squeezed, forms aluminium alloy.
As the improvement of said program, refining temperature is 730-740 DEG C, and 20-30min is stood after refining.
As the improvement of said program, casting speed 90-95mm/min.
As the improvement of said program, the step of aluminium alloy bars is squeezed, includes：
S51, heating：Aluminium alloy bars is heated to 470-530 DEG C, mold is heated to 460-480 DEG C；
S52, extruding：Ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from squeezing
It is squeezed out in the discharge port of compression mould, forms extrudate, it is 525-550 DEG C to squeeze out material mouth temperature；
S53, press quenching：Extrudate, by traction machine travel, is quenched after discharge port at fixed discharge pedestal using water mist
Fiery device carries out press quenching；
S54, artificial aging processing：Extrudate is put into artificial aging stove and carries out ageing treatment；
As the improvement of said program, the temperature of discharge port is 530-545 DEG C in step S52.
Cooling rate, which is quenched, as the improvement of said program, in step S53 is maintained at 280-300 DEG C/min.
As the improvement of said program, in step S54, after extrudate is put into artificial aging stove, artificial aging stove liter
Temperature keeps the temperature 8 hours to after 170 DEG C.
Implement the present invention, have the advantages that：
1st, the present invention also provides a kind of aluminium alloy and preparation method thereof, the present invention by allocating the ratio of Si/Mg/Mn,
Opposite reduce makes Mg/Mn component ratios, improves Si component ratios, so as to ensure the integral strength of aluminium alloy, and enables aluminum alloy to have
There is good extrusion performance.In addition, the content by reducing Fe/Cu/Zn, the corrosion resistance of aluminium alloy is improved.
2nd, the present invention also provides a kind of preparation method of aluminium alloy, when aluminium alloy bars is squeezed, by by temperature
It is arranged on 170 DEG C and low temperature aging is carried out to extrudate, effectively improve the intensity of section bar.In addition, by the way that temperature setting is existed
170 DEG C carry out low temperature aging to extrudate, can eliminate the internal stress that is generated in mechanical processing process and to microstructure
Damage optimizes crystal structure, optimizes mechanical performance, makes to keep in terms of the tensile property, flexility and anti-fatigue performance of material
Preferable matching.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, present invention work is further retouched in detail below
It states.
The present invention provides a kind of aluminium alloy, including following component：
The Si of 0.85~1.0wt%；
Fe more than zero and less than or equal to 0.2wt%；
Cu more than zero and less than or equal to 0.05wt%；
The Mn of 0.5~0.7wt%；
The Mg of 0.5~0.7wt%；
Zn more than zero and less than or equal to 0.1wt%；
Ti more than zero and less than or equal to 0.1wt%；
The Al of surplus.
Specifically, silicon (Si) in aluminium alloy, can improve the casting character and tensile strength of aluminium alloy.Si is closed in casting aluminium
Jin Zhong, the mobility with the increase aluminium alloy of Si contents also increase.But otherwise the content of Si is held no more than 1.0wt%
Easily there is phenomenon of rupture, in addition, can also reduce the coefficient of expansion of casting, weaken the wear-resisting property of casting.The content of the Si is
0.85~1.0wt%, preferably 0.86~0.9wt%, more preferably 0.95~1.0wt%.
Magnesium (Mg) has invigoration effect to Al, can enhance the tensile strength of aluminium alloy, but the content of Mg is more than 0.7wt%
When, the corrosion resistance of aluminium alloy can be reduced.The content of the Mg be 0.5~0.7wt%, preferably 0.5~0.6wt%, it is more excellent
It is selected as 0.55~0.6wt%.
Wherein, Si and Mg are added in aluminium simultaneously, can be formed Al~Mg~Si alloys, not only ensured the intensity of aluminium alloy, but also make
Aluminium alloy has good extrusion performance.
Manganese (Mn) is the important element in aluminium alloy, can effectively improve the corrosion resistance and weldability of alloy；Simultaneously
Manganese has as High-Temperature Strengthening phase and improves recrystallization temperature, inhibit the effect of recrystallization roughening, can realize the solid solution to alloy
Strengthen, supplement is strengthened and improves heat resistance.The content of the Mn be 0.5~0.7wt%, preferably 0.5~0.6wt%, more
Preferably 0.55~0.6wt%.
As feature microalloy element, since aluminium can form Al with iron3Fe, the Al of precipitation3Fe diffusing particles inhibit alloy
The deformation of creep, and improve the stability of connection.Fe can improve the tensile strength, yield limit and heat resistance of aluminium base,
The plasticity of alloy can also be improved simultaneously.In the preparation process of aluminium alloy, part Fe is with Al in alloy3The form of Fe is precipitated,
After the high temperature anneal, solid solution smallers of the Fe in aluminium base, then Fe is on the electrical property influence very little of alloy；But these disperses are analysed
Going out mutually can enhance the anti-fatigue performance of alloy and the heat resistance of hot operation.In alloy the content of Fe in 0.001wt% hereinafter,
To aluminium base performance change very little, do not have effect, but the content of Fe cannot be too high, if more than 0.2wt%, aluminium base it is corrosion-resistant
The weakening of performance is more apparent, for being used for automotive field in terms of use can have an impact, therefore overall content control 0.2wt%
Following effect is preferable.The content of the Fe for 0.001~0.2wt%, preferably 0.01~0.2wt%, more preferably 0.1~
0.2wt%.
Copper (Cu) is the basic intensified element in aluminium alloy, it forms θ (Al2Cu) phase with aluminium, and θ phases have solution strengthening
With the effect of dispersion-strengtherning, the tensile strength and yield strength of aluminium alloy can be effectively improved.If the content of copper is less than
0.001wt% then improves unobvious to the mechanical performance of aluminium alloy, if content is more than 0.05wt%, reduces the resistance to of aluminium alloy
Corrosivity.In addition, Cu can also improve aluminum alloy heat performance.The content of the Cu be 0.001~0.05wt%, preferably 0.008
~0.05wt%, more preferably 0.01~0.05wt%.
Zinc (Zn) is individually added into aluminium, extremely limited to the raising of intensity of aluminum alloy under deformation condition, and existing simultaneously should
Power corrosion cracking, tendency, thus limit its application.It adds in zinc and magnesium simultaneously in aluminium, forms hardening constituent Mg/Zn2, pairing
Gold generates apparent invigoration effect.The content of the Zn is to be less than or equal to 0.1wt% more than zero, preferably 0.001~
0.0.1wt%, more preferably 0.01~0.1wt%.
Copper is added on the basis of Al-Zn-Mg, forms Al-Zn-Mg-Cu systems alloy, base strengthens effect in institute
There is maximum in aluminium alloy, also the important aluminum alloy materials of auto industry.
Trace additives of titanium (Ti) element as complex compound, in alloy melt with Fe, Mg, Cu, etc. it is a variety of
Element forms aluminium base complex compound, and effective crystallization of refinement improves texture structure, and is precipitated on the crystal boundary of aluminium base compound
Alloy cpd reduces abated effect of other trace elements to aluminium alloy electric performance, and improves the creep-resistant property of aluminium alloy
Improve the casting character of alloy.The content of the Ti is to be less than or equal to 0.1wt%, preferably 0.001~0.1wt% more than zero,
More preferably 0.01~0.1wt%.
It should be noted that the ratio of the invention by allocating Si/Mg/Mn, opposite reduce makes Mg/Mn component ratios, carries
High Si component ratios so as to ensure the integral strength of aluminium alloy, and enable aluminum alloy to have good extrusion performance.In addition, pass through
The content of Fe/Cu/Zn is reduced, improves the corrosion resistance of aluminium alloy.Existing al alloy component improves containing for Si/Mn by blindness
Amount, makes Si/Mn contents walk to reach the standard grade, and tensile strength obtains big promotion, but corrosion resistance and extrudability substantially reduce.
Correspondingly, the present invention also provides a kind of preparation method of aluminium alloy, include the following steps：
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 730-760 DEG C；
S2, following raw materials are added in into foundry furnace by proportioning：The Si of 0.85~1.0wt% more than zero and is less than or equal to
The Fe of 0.2wt%, Cu, the Mg of the Mn of 0.5~0.55wt%, 0.55~0.6wt% more than zero and less than or equal to 0.05wt%,
Zn more than zero and less than or equal to 0.1wt%, the Ti more than zero and less than or equal to 0.1wt%, wherein, the component of Al for it is above-mentioned into
The surplus divided；
S3, it carries out degassing processing and refines, refining temperature is 720-750 DEG C, stands 20-40min after refining, obtains alloy
Liquid；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 85-95mm/min；
S5, aluminium alloy bars is squeezed, forms aluminium alloy.
It should be noted that in step sl, in order to which various elements is made fully to melt, being uniformly distributed, in-furnace temperature is
730-760℃.Preferably, in-furnace temperature is 740-750 DEG C.Wherein, the purity of aluminium ingot for 99.7% and more than.Specifically, it treats
Aluminium ingot carries out step S2 again after completing fusing.
In step s3, various principles are aoxidized in mixing in order to prevent, are needed to carry out degassing processing, preferentially be selected lazy
Property gas carry out degasification, it is preferred that select nitrogen.In addition, in order to which various elements is made uniformly to mix, and impurity is removed, essence
It is 720-750 DEG C to refine temperature, it is preferred that refining temperature is 730~740 DEG C.In order to ensure to be cast as aluminium alloy bars, make it
Intensity and ductility have preferable matching, and 20-40min is stood after refining.Preferably, 20-30min is stood after refining.
In step s 4, in order to which aluminium alloy cast ingot is carried out Homogenization Treatments, it can ensure ingot casting during extruding,
Its intensity and ductility have preferable matching, so as to avoid leading to the destruction of material microstructure using traditional approach and into one
Step influences processing performance, casting speed 85-95mm/min.Preferably, casting speed is 90~95mm/min.
Since aluminium is unlikely to be burnt, and addition is more, therefore aluminium first is added in smelting furnace, then adds in other metal members
Element.Alloying element of the present invention is preferably added in using said sequence, is not lost after making various elements melting, while various elements
It can fully melt, be uniformly distributed.
Specifically, in step S5 of the present invention, the step of aluminium alloy bars is squeezed, includes：
S51, heating：Aluminium alloy bars is heated to 470-530 DEG C, mold is heated to 460-480 DEG C；
S52, extruding：Ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from squeezing
It is squeezed out in the discharge port of compression mould, forms extrudate；
S53, press quenching：Extrudate, by traction machine travel, is quenched after discharge port at fixed discharge pedestal using water mist
Fiery device carries out press quenching；
S54, artificial aging processing：Extrudate is put into artificial aging stove and carries out ageing treatment.
It should be noted that aluminium alloy bars needs to heat in advance before extrusion, reach close to solvus temperature, so as in aluminium alloy
Element in stick can melt, and equably be flowed in aluminium material.Wherein, aluminium alloy bars is heated to 470-530 DEG C, preferably position 480
~520 DEG C.Mold temperature must be maintained at 460-480 DEG C before extrusion, so as to not so can easily generate blocking even damage mold
The phenomenon that.Preferably, mold is heated to 480 DEG C.
And when extruder starts, the huge pushing strength of pressure ram is the aluminium alloy bars softened by the discharge port of mold
It squeezes out, in order to ensure extrusion forming, prevents the extrudate squeezed out from deforming, the temperature of discharge port is 525-550 DEG C, preferably
It is 530-545 DEG C.When the temperature of discharge port is higher than 600 DEG C, it can make extrudate that tear phenomenon occur, and shadow is to section bar
Surface quality.
The purpose of press quenching is that supersaturated solid solution remains rapidly, to ensure extrudate after artificial aging
Intensity and corrosion resistance, the quenching cooling rate in step S53 is maintained at 280-350 DEG C/min, preferably 280~300 DEG C/
min.When quenching cooling rate is more than 350 DEG C/min, cooling rate is too fast, and the atom in extrudate is caused to be not sufficiently stable, drop
Its low intensity and corrosion resistance.
In step S54, after extrudate is put into artificial aging stove, after artificial aging stove is warming up to 150-180 DEG C, protect
It is 6-10 hours warm；After preferably artificial aging stove is warming up to 170 DEG C, 8 hours are kept the temperature.By by temperature setting 170 DEG C to squeeze
Die mould material carries out low temperature aging, effectively improves the intensity of section bar.In addition, by by temperature setting at 170 DEG C to extrudate
Low temperature aging is carried out, the internal stress generated in mechanical processing process and the damage to microstructure can also be eliminated, optimizes crystal
Structure optimizes mechanical performance, makes to keep preferable matching in terms of the tensile property, flexility and anti-fatigue performance of material.
For a further understanding of the present invention, with reference to embodiment to aluminium alloy provided by the invention and preparation method thereof into
Row is described in detail, and protection scope of the present invention is not limited by the following examples.
Embodiment 1
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 730 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 720 DEG C, and 20min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 85mm/min；
S5, aluminium alloy bars is heated to 470 DEG C, mold is heated to 460 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 525 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 280 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 150 DEG C, heat preservation
10 hours.
Embodiment 2
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 740 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 730 DEG C, and 30min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 90mm/min；
S5, aluminium alloy bars is heated to 480 DEG C, mold is heated to 460 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 530 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 290 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 170 DEG C, heat preservation 8
Hour.
Embodiment 3
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 750 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 740 DEG C, and 35min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 95mm/min；
S5, aluminium alloy bars is heated to 500 DEG C, mold is heated to 470 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 540 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 300 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 170 DEG C, heat preservation 8
Hour.
Embodiment 4
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 760 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 750 DEG C, and 40min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 95mm/min；
S5, aluminium alloy bars is heated to 530 DEG C, mold is heated to 480 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 550 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 320 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 180 DEG C, heat preservation 6
Hour.
Embodiment 5
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 740 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 730 DEG C, and 30min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 90mm/min；
S5, aluminium alloy bars is heated to 480 DEG C, mold is heated to 460 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 530 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 290 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 170 DEG C, heat preservation 8
Hour.
Embodiment 6
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 750 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 740 DEG C, and 35min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 95mm/min；
S5, aluminium alloy bars is heated to 500 DEG C, mold is heated to 470 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 540 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 300 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 170 DEG C, heat preservation 8
Hour.
Embodiment 7
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 760 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 750 DEG C, and 40min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 95mm/min；
S5, aluminium alloy bars is heated to 520 DEG C, mold is heated to 480 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 550 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 320 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 180 DEG C, heat preservation 6
Hour.
Embodiment 8
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 730 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 720 DEG C, and 20min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 85mm/min；
S5, aluminium alloy bars is heated 470 DEG C, mold is heated to 460 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 525 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 280 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 150 DEG C, heat preservation
10 hours.
Embodiment 9
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 760 DEG C；
S2, following raw materials are added in into foundry furnace：Si, Fe, Cu, Mn, Mg, Zn and Ti；
S3, it carries out nitrogen degasification and refines, refining temperature is 750 DEG C, and 40min is stood after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 95mm/min；
S5, aluminium alloy bars is heated 530 DEG C, mold is heated to 480 DEG C；
S6, ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
Discharge port in squeeze out, formed extrudate, 550 DEG C of the temperature of discharge port；
S7, extrudate, by traction machine travel, are carried out after discharge port at fixed discharge pedestal using water fog quenching device
Press quenching, quenching cooling rate are 300 DEG C/min；
S8, extrudate is put into artificial aging stove progress ageing treatment, after artificial aging stove is warming up to 180 DEG C, heat preservation 7
Hour.
The aluminium alloy prepared according to the method described above is tested for the property, the relevant regulations tested according to GB/T228
It carries out, as a result referring to table 2.
The component list (wt%) of aluminium alloy prepared by 1 embodiment of table
The performance test data table of aluminium alloy prepared by 2 embodiment of table and comparative example
From table 2 it can be seen that the aluminium alloy of the present invention has good comprehensive performance, wherein, in Mechanics Performance Testing,
The tensile strength of the aluminium alloy of the present invention is all higher than 295MPa, has been more than the tensile strength of existing 6082 aluminium alloy；Corroding
In performance test, the corrosion resistance test mass loss of aluminium alloy of the invention is respectively less than 0.5g/m2Hr, better than existing 6082
The corrosion resistance of aluminium alloy；In extrusion performance test, the non-regulation ratio extension strength of aluminium alloy of the invention is all higher than
295MPa, elongation after fracture are respectively less than 12%, are superior to existing 6082 aluminium alloy.
Above disclosed is only a kind of preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent variations made according to the claims of the present invention, are still within the scope of the present invention.
Claims (10)
1. a kind of aluminium alloy, including following component：
The Si of 0.85~1.0wt%；
Fe more than zero and less than or equal to 0.2wt%；
Cu more than zero and less than or equal to 0.05wt%；
The Mn of 0.5~0.55wt%；
The Mg of 0.55~0.6wt%；
Zn more than zero and less than or equal to 0.1wt%；
Ti more than zero and less than or equal to 0.1wt%；
The Al of surplus.
2. aluminium alloy according to claim 1, which is characterized in that the Si including 0.85~0.9wt%.
3. aluminium alloy according to claim 1, which is characterized in that the Si including 0.95~1.0wt%.
4. a kind of preparation method of aluminium alloy, includes the following steps：
S1, aluminium ingot is put into foundry furnace and is melted, in-furnace temperature is 730-760 DEG C；
S2, following raw materials are added in into foundry furnace by proportioning：The Si of 0.85~1.0wt%, more than zero and less than or equal to 0.2wt%'s
Fe, more than zero and less than or equal to 0.05wt% Cu, the Mg of the Mn of 0.5~0.55wt%, 0.55~0.6wt%, more than zero and
Zn less than or equal to 0.1wt%, the Ti more than zero and less than or equal to 0.1wt%, wherein, the component of Al is the remaining of mentioned component
Amount；
S3, it carries out degassing processing and refines, refining temperature is 720-750 DEG C, stands 20-40min after refining, obtains aluminium alloy；
S4, aluminium alloy is cast as aluminium alloy bars, wherein, casting speed 85-95mm/min；
S5, aluminium alloy bars is squeezed, forms aluminium alloy.
5. the preparation method of aluminium alloy according to claim 4, which is characterized in that refining temperature is 730-740 DEG C, refining
After stand 20-30min.
6. the preparation method of aluminium alloy according to claim 4 or 5, which is characterized in that casting speed 90-95mm/
min。
7. the preparation method of aluminium alloy according to claim 4, which is characterized in that the step of being squeezed aluminium alloy bars
Including：
S51, heating：Aluminium alloy bars is heated to 470-530 DEG C, mold is heated to 460-480 DEG C；
S52, extruding：Ingot casting is put into extrusion cylinder, the pressure ram of extruder pushes aluminium alloy cast ingot in extrusion cylinder from extrusion die
It is squeezed out in the discharge port of tool, forms extrudate, it is 525-550 DEG C to squeeze out material mouth temperature；
S53, press quenching：Extrudate, by traction machine travel, is filled after discharge port at fixed discharge pedestal using water spray quenching
Put carry out press quenching；
S54, artificial aging processing：Extrudate is put into artificial aging stove and carries out ageing treatment.
8. the preparation method of aluminium alloy according to claim 7, which is characterized in that the temperature of discharge port is in step S52
530-545℃。
9. the preparation method of aluminium alloy according to claim 7 or 8, which is characterized in that quench cooling rate in step S53
It is maintained at 280-300 DEG C/min.
10. the preparation method of aluminium alloy according to claim 7, which is characterized in that in step S54, extrudate is put
After entering artificial aging stove, after artificial aging stove is warming up to 170 DEG C, 8 hours are kept the temperature.
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| CN111647783A (en) * | 2020-07-27 | 2020-09-11 | 佛山金兰铝厂有限公司 | Aluminum alloy profile for 5G equipment and preparation method thereof |
| 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 |
| CN112725666A (en) * | 2020-11-24 | 2021-04-30 | 宁波科诺精工科技有限公司 | Aluminum alloy with cold heading non-cracking effect |
| CN113122786A (en) * | 2020-01-13 | 2021-07-16 | 晟通科技集团有限公司 | Anti-corrosion treatment method of paint-free aluminum alloy product |
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| CN107034392A (en) * | 2017-04-14 | 2017-08-11 | 山东南山铝业股份有限公司 | A kind of Al Mg Si line aluminium alloys extrudates and its production technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122786A (en) * | 2020-01-13 | 2021-07-16 | 晟通科技集团有限公司 | Anti-corrosion treatment method of paint-free aluminum alloy product |
| 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 |
| CN111647783A (en) * | 2020-07-27 | 2020-09-11 | 佛山金兰铝厂有限公司 | Aluminum alloy profile for 5G equipment and preparation method thereof |
| CN112725666A (en) * | 2020-11-24 | 2021-04-30 | 宁波科诺精工科技有限公司 | Aluminum alloy with cold heading non-cracking effect |
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