CN107805747A - A kind of automobile swing arm and preparation method thereof - Google Patents
A kind of automobile swing arm and preparation method thereof Download PDFInfo
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- CN107805747A CN107805747A CN201710902577.5A CN201710902577A CN107805747A CN 107805747 A CN107805747 A CN 107805747A CN 201710902577 A CN201710902577 A CN 201710902577A CN 107805747 A CN107805747 A CN 107805747A
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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
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/001—Suspension arms, e.g. constructional features
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
- C22C1/1052—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites by mixing and casting metal matrix composites with reaction
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
-
- 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
- C22F1/053—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 zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
Abstract
The present invention relates to a kind of automobile swing arm and preparation method thereof, belong to automobile technical field.The automobile swing arm of the present invention is made up of aluminium alloy, and aluminium alloy includes the component of following mass percentage content：0.1~0.3%Si, 2.0~2.6%Cu, 0.3~0.6%Mn, 1.8~2.3%Mg, 0~0.04%Cr, 7.6~8.4%Zn, 0.06~0.15%Ti, 0.05~0.25Zr, 5.5~9.3%AlN microballoon, 1.5~2.1% nano-aluminum nitrides, 0.15~0.35Fe, 0.12~0.35%RE, surplus Al.Automobile swing arm produced by the present invention has the characteristics of lightweight, good mechanical performance.
Description
Technical field
The invention belongs to automobile technical field, is related to a kind of automobile swing arm and preparation method thereof.
Background technology
Automobile chassis suspension is broadly divided into front suspension and rear suspension, and forward and backward suspension has swing arm connection wheel and vehicle body, pendulum
Arm is usually located between wheel and vehicle body, is guiding and the support of suspension.Automobile swing arm is related to the damping property of automobile, walking surely
The performances such as qualitative and Steering sensitivity.The deformation of swing arm can influence wheel alignment, reduce roadability；If front swing arm is asked
Topic, may feel that steering wheel rocks, and unclamp easy sideslip after steering wheel, difficult when high speed to grasp direction.At present, market
On hybrid vehicle swing arm casting can not meet requirement, be mainly manifested in：1st, tensile strength is on the weak side, guide effect
Difference；2nd, yielding, stability is poor；3rd, weight is larger, causes nonspring carried mass to become big, so as to which increase that suspension system is subject to rushes
Load is hit, the comfortableness of vehicle is affected；4th, hardness is low, easy fracture, and swing arm support effect is poor, and service life substantially reduces,
Have a strong impact on the security of running car.
The content of the invention
The purpose of the present invention is in view of the above-mentioned problems existing in the prior art, it is proposed that a kind of lightweight, mechanical property are excellent
Good automobile swing arm.
The purpose of the present invention can be realized by following technical proposal：
A kind of automobile swing arm, the automobile swing arm are made up of aluminium alloy, and the aluminium alloy contains including following mass percent
The component of amount：0.1~0.3%Si, 2.0~2.6%Cu, 0.3~0.6%Mn, 1.8~2.3%Mg, 0~0.04%Cr, 7.6
~8.4%Zn, 0.06~0.15%Ti, 0.05~0.25Zr, 5.5~9.3%AlN microballoons, 1.5~2.1% nano-aluminum nitrides,
0.15~0.35Fe, 0.12~0.35%RE, surplus Al.
The present invention on the basis of 7055 aluminium alloys, improve Si, Mn, Ti and Fe content, and with the addition of AlN microballoons,
Nano-aluminum nitride and RE, significantly improve the intensity, toughness and impact resistance of automobile swing arm.Wherein, in the present invention appropriate Si with
Al can form Al+Si eutectic liquid phases, be favorably improved aluminium alloy casting fluidity；The Mg and a large amount of Mg of matrix Al Element generations5Al
Phase, Mg can be made by heat treatment5Al phases are dissolved into alloy matrix aluminum α phases, have ambient temperature mechanical properties so as to improve aluminium alloy,
But excessive Mg5Al phases are difficult to whole solid solutions, are easily collected between matrix crystal boundary, can reduce the overall mechanics of aluminium alloy
Performance；Mg also can form Mg with Si2Si hardening constituents, hardening constituent MgZn is formed with Zn2, by adjusting Mg, Si, Zn content, by three
Person is controlled in rational scope, the proportionate Mg of shape2Si phases and MgZn2Phase, the tension that can be remarkably reinforced aluminium alloy are strong
Degree and yield strength, excessive Mg2Si meets the toughness for causing the fragility of aluminium alloy and reducing aluminium alloy, excessive MgZn2Xiang Ze
The temperature flowing of aluminium alloy can be reduced, so as to reduce the pourability of aluminium alloy.Mn can hinder aluminium alloy in the present invention
Recrystal grain is grown up, and improves recrystallization temperature, and can significantly refine recrystal grain.Hot cracking tendency can be also reduced simultaneously, is made
Mg5Al8Compound homogeneous precipitation, improve the corrosion stability of aluminium alloy.Appropriate Mn can form Hard Inclusion phase in aluminium alloy, so as to
Improve the anti-wear performance of aluminium alloy, reduce coefficient of friction, improve the heat resistance of matrix, but excessive Mn easily with other elements
Excessive Hard Inclusion is formed, reduces the mechanical property and thermal conductivity of aluminium alloy.Ti and Al forms TiAl in the present invention2Phase, turn into aluminium
Heterogeneous necleus when alloy crystallizes, cast sturcture can be caused by playing refinement cast sturcture and seam organization, excessive Ti
In non-equilibrium crystalline phase increase, reduce the degree of supersaturation of aluminium alloy, be unfavorable for the raising of intensity of aluminum alloy.The present invention passes through each member
The synergy of element, improve originally in 7055 aluminium alloys as impurity Fe elements addition, appropriate Fe can drop
The difficulty that aluminium alloy is stripped after low casting, and improve the heat endurance of aluminium alloy.AlN microballoons and nano-aluminum nitride in the present invention
Addition can greatly improve the intensity and heat endurance of alloy aluminum, and the wetability of AlN and alloy matrix aluminum is good, with aluminium alloy
With preferable compatibility.AlN microballoons and nano-aluminum nitride can produce micro-deformation in drawing process, slack interfacial stress,
So as to improve the intensity of aluminium alloy and shock resistance.The appropriate rare earth element added in the present invention can effective crystal grain thinning,
Improve the microstructure form of aluminium alloy, improve casting fluidity, intensity and the plasticity of aluminium alloy.
Preferably, the AlN microballoons include aluminium core and are at least partly coated on the AlN film layer of aluminium core outer layer.
It is the AlN microballoons that aluminium outer layer portion envelops have AlN film layer that the present invention adds inner core in aluminium alloy, interior in melting
The aluminium of core is melted out, and in casting process together with other metallic element meltings, when being cooled down after cast, alloy matrix aluminum exists
Network structure is formed between AlN film layer, and AlN film layer is wrapped in alloy matrix aluminum as the arcuate structure of high intensity, energy
Higher stress is enough born, so as to significantly improve the impact resistance of aluminium alloy.
Preferably, the AlN microballoons include AlN microballoons I and AlN microsphere Ⅱs, the particle diameter of the AlN microballoons I is 1~3 μ
M, the particle diameter of the AlN microsphere Ⅱs is 5~7 μm.
The present invention adds the different AlN microballoons of two kinds of sizes in aluminium alloy, is acted synergistically with nano-aluminum nitride, in aluminium alloy
When bearing larger foreign impacts and stress, stress can be decayed step by step, so as to avoid aluminium alloy that destructive tear occurs
Split.
Preferably, the thickness of the AlN film layer of the AlN microballoons I is 50~100nm, the AlN film of the AlN microsphere Ⅱs
The thickness of layer is 200~300nm.
When the AlN film layer of AlN microballoons is too thin, aluminium alloy is easily chipping when bearing larger foreign impacts and stress,
And the toughness of aluminium alloy can be reduced when too thick.
Preferably, the mass percent of the AlN microballoons I and AlN microsphere Ⅱs in aluminium alloy be respectively 1.8~
3.3% and 3.7~6.0%.
When the content of AlN microballoons I and AlN microsphere Ⅱs of the present invention is excessive, tear can be caused to act on alloy matrix aluminum, so as to
Reduce the intensity and toughness of aluminium alloy；The adding proportion of AlN microballoons I, AlN microsphere Ⅱs and nano-aluminum nitride is controlled in above range
Interior energy produces optimal synergy, improves the performance of aluminium alloy to greatest extent.
Preferably, the RE is the nano-powder of one or more mixing in Nd, Gd, Dy, Ho.
Preferably, the RE is Nd, Gd, Ho composite nano powder, the quality of described Nd, Gd, Ho in aluminium alloy
Percentage is respectively 0.03~0.09%, 0.05~0.13%, 0.04~0.14%.
In 7055 aluminium alloys, Fe and Si are objectionable impurities, may generation (Fe, Cr)3SiAl12, (Fe, Mn, Cu) A16、
Cu2FeAl7And Mg2The impurities phase oversize grain such as Si.In the alloy mainly in the form of the brittlement phases such as insoluble or indissoluble A1FeSi
In the presence of.After thermal processing distortion, the banded structure along deformation direction intermittent arrangement is easily formed.In plastic history, due to base
Body and brittlement phase deformation, easily form hole on boundary, produce microcrack, turn into rising for macroscopic cracking
Low-alloyed fracture toughness, drops in ground, and the present invention has effectively refined the production of the elements such as Fe and Si by the component of reasonable compatibility RE elements
Raw particle, these particles is converted into enhancing and be mutually present in alloy matrix aluminum；Appropriate Gd addition can also be reduced effectively
The generation of the brittlement phases such as A1FeSi, Gd addition is excessive, although can effective crystal grain thinning, be unfavorable for the fragility such as A1FeSi
The reduction of phase content.
Another object of the present invention is to provide a kind of preparation method of automobile swing arm, described preparation method includes following
Step,
S1, Al powder is nitrogenized in nitrogen, form AlN film layer on Al powder surface, AlN microballoons are made, then to AlN
Microballoon, which carries out ball milling, crushes AlN film layer segment；
S2, the heating of the raw metal of aluminium alloy is smelted into alloy molten solution, adds AlN microballoons and nano-aluminum nitride, stir
After be poured into mould, be heat-treated after cooling, produce automobile swing arm.
The present invention in Al powder surface construction AlN films layer by forming AlN microballoons, the formation arch bridge effect in aluminium alloy, from
And the impact resistance of aluminium alloy is effectively increased, AlN microballoons and nano-aluminum nitride produce cooperative effect in aluminium alloy, close aluminium
It can produce when greater impact that gold is born and stress and decay step by step, further increase the impact resistance of aluminium alloy, simultaneously
Also improve the intensity and toughness of aluminium alloy.
Preferably, the speed stirred in the step S2 is 500~600rmp, the time is 3.5~5.5min.
Preferably, the process poured into a mould in the step S2 is that the alloy molten solution to stir is poured into mould,
3~5min is ultrasonically treated under heat-retaining condition.
For the present invention by being ultrasonically treated to alloy molten solution, the vibrations of supersound process and cavitation effectively eliminate it
In micro-bubble, so as to improve the consistency of cast aluminium alloy gold and overall performance.
Preferably, the process being heat-treated in the step S2 is first to be warming up to 430~460 DEG C, 1.5~2.5h is incubated,
520~580 DEG C are then heated to, is incubated 2~3h, then room temperature is quickly down to 35~50 DEG C/min speed.
The present invention can effectively discharge the stress in aluminium alloy by the way of Fractional Heat-treatment, improve aluminium alloy capability,
The mode of fast cooling effectively prevent excessive growth of the aluminium alloy crystal in heat treatment process.
Compared with prior art, the invention has the advantages that：
Automobile swing arm is prepared using aluminium alloy, significantly reduces the quality of automobile swing arm；Pass through reasonable compatibility aluminium alloy
Component, significantly improve the intensity, toughness and impact resistance of automobile swing arm；And by optimizing the preparation technology of aluminium alloy, obtain
Obtained the automobile swing arm of function admirable.
Embodiment
It is the specific embodiment of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1~5
The automobile swing arm of embodiment 1~5 is made up of aluminium alloy, and aluminium alloy includes the component of following mass percentage content：
0.1~0.3%Si, 2.0~2.6%Cu, 0.3~0.6%Mn, 1.8~2.3%Mg, 0~0.04%Cr, 7.6~8.4%Zn,
0.06~0.15%Ti, 0.05~0.25Zr, 5.5~9.3%AlN microballoon, 1.5~2.1% nano-aluminum nitrides, 0.15~0.35Fe,
0.12~0.35%RE, surplus Al.
AlN microballoons include aluminium core and are at least partly coated on the AlN film layer of aluminium core outer layer, and AlN microballoons include AlN microballoons I
With AlN microsphere Ⅱs, the particle diameters of AlN microballoons I is 1~3 μm, and the thickness of AlN film layer is 50~100nm, the quality in aluminium alloy
Percentage is 1.8~3.3%；The particle diameter of AlN microsphere Ⅱs is 5~7 μm, and the thickness of AlN film layer is 200~300nm, in aluminium alloy
In mass percent be respectively 3.7~6.0%.
RE is the composite Nano of the nano-powder, preferably Nd, Gd, Ho of one or more mixing in Nd, Gd, Dy, Ho
Powder, the mass percent of Nd, Gd, Ho in aluminium alloy is respectively 0.03~0.09%, 0.05~0.13%, 0.04~
0.14%.
The component of aluminium alloy and other specification be as shown in Table 1 and Table 2 in embodiment 1~5.
Table 1：The component and its mass percent of aluminium alloy in embodiment 1~5
Table 2：AlN microballoons and RE parameter in aluminium alloy in embodiment 1~5
Embodiment 6
The preparation method of automobile swing arm comprises the following steps in the present embodiment,
(1), prepare raw material according to the raw material in embodiment 3 and proportioning, Al powder is nitrogenized in nitrogen, in Al powder
Surface forms AlN film layer, by controlling the degree of nitridation, the AlN microballoons with different-thickness AlN film layer is made, then to AlN
Microballoon, which carries out ball milling, crushes AlN film layer segment；
(2) the raw metal heating of aluminium alloy, is smelted into alloy molten solution, adds AlN microballoons and nano-aluminum nitride,
It is poured into after stirring 5.5min under 500rmp rotating speeds in mould, is ultrasonically treated 3min under heat-retaining condition, is subsequently cooled to room temperature,
It is heat-treated again, is first warming up to 430 DEG C, be incubated 2.5h, then heat to 520 DEG C, is incubated 3h, then the speed with 35 DEG C/min
Room temperature quickly is down to, produces automobile swing arm.
Embodiment 7
The preparation method of automobile swing arm comprises the following steps in the present embodiment,
(1), prepare raw material according to the raw material in embodiment 3 and proportioning, Al powder is nitrogenized in nitrogen, in Al powder
Surface forms AlN film layer, by controlling the degree of nitridation, the AlN microballoons with different-thickness AlN film layer is made, then to AlN
Microballoon, which carries out ball milling, crushes AlN film layer segment；
(2) the raw metal heating of aluminium alloy, is smelted into alloy molten solution, adds AlN microballoons and nano-aluminum nitride,
It is poured into after stirring 5.0min under 530rmp rotating speeds in mould, is ultrasonically treated 4min under heat-retaining condition, is subsequently cooled to room temperature,
It is heat-treated again, is first warming up to 440 DEG C, be incubated 2.0h, then heat to 550 DEG C, is incubated 2.5h, then the speed with 40 DEG C/min
Degree is quickly down to room temperature, produces automobile swing arm.
Embodiment 8
The preparation method of automobile swing arm comprises the following steps in the present embodiment,
(1), prepare raw material according to the raw material in embodiment 3 and proportioning, Al powder is nitrogenized in nitrogen, in Al powder
Surface forms AlN film layer, by controlling the degree of nitridation, the AlN microballoons with different-thickness AlN film layer is made, then to AlN
Microballoon, which carries out ball milling, crushes AlN film layer segment；
(2) the raw metal heating of aluminium alloy, is smelted into alloy molten solution, adds AlN microballoons and nano-aluminum nitride,
It is poured into after stirring 4.0min under 580rmp rotating speeds in mould, is ultrasonically treated 4min under heat-retaining condition, is subsequently cooled to room temperature,
It is heat-treated again, is first warming up to 450 DEG C, be incubated 2.0h, then heat to 560 DEG C, is incubated 2.5h, then the speed with 45 DEG C/min
Degree is quickly down to room temperature, produces automobile swing arm.
Embodiment 9
The preparation method of automobile swing arm comprises the following steps in the present embodiment,
(1), prepare raw material according to the raw material in embodiment 3 and proportioning, Al powder is nitrogenized in nitrogen, in Al powder
Surface forms AlN film layer, by controlling the degree of nitridation, the AlN microballoons with different-thickness AlN film layer is made, then to AlN
Microballoon, which carries out ball milling, crushes AlN film layer segment；
(2) the raw metal heating of aluminium alloy, is smelted into alloy molten solution, adds AlN microballoons and nano-aluminum nitride,
It is poured into after stirring 3.5min under 600rmp rotating speeds in mould, is ultrasonically treated 5min under heat-retaining condition, is subsequently cooled to room temperature,
It is heat-treated again, is first warming up to 460 DEG C, be incubated 1.5h, then heat to 580 DEG C, is incubated 2h, then the speed with 50 DEG C/min
Room temperature quickly is down to, produces automobile swing arm.
Embodiment 10~13
Prepare raw material according to the raw material and proportioning of embodiment 1,2,4,5 respectively, carried out according to the preparation method of embodiment 8
The preparation of automobile swing arm.
Comparative example 1
Aluminium alloy is 7055 aluminium alloys, other same as Example 8.
Comparative example 2
AlN microballoons and nano-aluminum nitride are not added with aluminium alloy, it is other same as Example 8.
Comparative example 3
AlN microballoons are not added with aluminium alloy, it is other same as Example 8.
Comparative example 4
Aluminium alloy is prepared using normal pouring method, it is other same as Example 8.
The performance of the automobile swing arm prepared in the embodiment of the present invention 6~13, comparative example 1~4 is compared, comparative result
As shown in table 3.
Table 3：The comparison of automobile swing arm performance in embodiment 6~15, comparative example 1~4
In summary, the raw material components of the invention by reasonable compatibility aluminium alloy, and by optimizing preparation technology and its ginseng
Number, light weight, the automobile swing arm of good mechanical performance is made.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (10)
1. a kind of automobile swing arm, it is characterised in that the automobile swing arm is made up of aluminium alloy, and the aluminium alloy includes following quality
The component of degree：0.1~0.3%Si, 2.0~2.6%Cu, 0.3~0.6%Mn, 1.8~2.3%Mg, 0~
0.04%Cr, 7.6~8.4%Zn, 0.06~0.15%Ti, 0.05~0.25Zr, 0.15~0.35Fe, 0.12~0.35%
RE, 5.5~9.3%AlN microballoon, 1.5~2.1% nano-aluminum nitrides, surplus Al.
2. automobile swing arm according to claim 1, it is characterised in that the AlN microballoons include aluminium core and at least partly wrapped
Overlay on the AlN film layer of aluminium core outer layer.
3. automobile swing arm according to claim 1 or 2, it is characterised in that the AlN microballoons include AlN microballoons I and AlN
Microsphere Ⅱ, the particle diameter of the AlN microballoons I is 1~3 μm, and the particle diameter of the AlN microsphere Ⅱs is 5~7 μm.
4. automobile swing arm according to claim 3, it is characterised in that the AlN microballoons I and AlN microsphere Ⅱs are in aluminium alloy
In mass percent be respectively 1.8~3.3% and 3.7~6.0%.
5. automobile swing arm according to claim 1, it is characterised in that the RE is one kind or more in Nd, Gd, Dy, Ho
The nano-powder of kind mixing.
6. automobile swing arm according to claim 1 or 5, it is characterised in that the RE is Nd, Gd, Ho composite nano powder
Body, the mass percent of described Nd, Gd, Ho in aluminium alloy is respectively 0.03~0.09%, 0.05~0.13%, 0.04~
0.14%.
7. a kind of preparation method of the automobile swing arm as described in claim 1~6 any claim, it is characterised in that described
Preparation method comprises the following steps,
S1, Al powder is nitrogenized in nitrogen, form AlN film layer on Al powder surface, AlN microballoons are made, then to AlN microballoons
Carrying out ball milling crushes AlN film layer segment；
S2, the heating of the raw metal of aluminium alloy is smelted into alloy molten solution, adds AlN microballoons and nano-aluminum nitride, poured after stirring
Note in mould, be heat-treated after cooling, produce automobile swing arm.
8. preparation method according to claim 7, it is characterised in that the speed stirred in the step S2 be 500~
600rmp, time are 3.5~5.5min.
9. preparation method according to claim 7, it is characterised in that the process poured into a mould in the step S2 is to stir
Uniform alloy molten solution is poured into mould, and 3~5min is ultrasonically treated under heat-retaining condition.
10. preparation method according to claim 7, it is characterised in that the process being heat-treated in the step S2 is first to rise
Temperature is incubated 1.5~2.5h to 430~460 DEG C, then heats to 520~580 DEG C, is incubated 2~3h, then with 35~50 DEG C/min
Speed be quickly down to room temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790656A (en) * | 2018-06-14 | 2018-11-13 | 安庆市汇通汽车部件有限公司 | A kind of distance rod and its manufacturing method |
| CN110055445A (en) * | 2019-05-17 | 2019-07-26 | 亚太轻合金(南通)科技有限公司 | A kind of high-strength aluminum alloy and preparation method thereof |
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| JPH0280557A (en) * | 1988-09-17 | 1990-03-20 | Sumitomo Metal Ind Ltd | Manufacture of metallic mold made of superplastic zn-al alloy |
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| CN104532046A (en) * | 2014-12-24 | 2015-04-22 | 南昌大学 | Method for preparing nano-aluminum-nitride reinforced aluminum-based composite semi-solid slurry based on ultrasonic and mechanical vibration combination |
| CN106435307A (en) * | 2016-10-19 | 2017-02-22 | 山东裕航特种合金装备有限公司 | High-strength high-conductivity seven-series aluminum alloy for aircraft seat and preparing method of aluminum alloy |
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| JPH0280557A (en) * | 1988-09-17 | 1990-03-20 | Sumitomo Metal Ind Ltd | Manufacture of metallic mold made of superplastic zn-al alloy |
| CN102330004A (en) * | 2011-10-31 | 2012-01-25 | 哈尔滨中飞新技术股份有限公司 | Manufacturing method for aluminum alloy die forgings |
| CN103255326A (en) * | 2012-02-16 | 2013-08-21 | 株式会社神户制钢所 | Aluminum alloy extruded material for electro-magnetic forming |
| CN104532030A (en) * | 2014-12-24 | 2015-04-22 | 南昌大学 | Method for preparing nano-aluminum-nitride particle reinforced aluminum-based composite semi-solid slurry based on ultrasonic treatment |
| CN104532046A (en) * | 2014-12-24 | 2015-04-22 | 南昌大学 | Method for preparing nano-aluminum-nitride reinforced aluminum-based composite semi-solid slurry based on ultrasonic and mechanical vibration combination |
| CN106435307A (en) * | 2016-10-19 | 2017-02-22 | 山东裕航特种合金装备有限公司 | High-strength high-conductivity seven-series aluminum alloy for aircraft seat and preparing method of aluminum alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108790656A (en) * | 2018-06-14 | 2018-11-13 | 安庆市汇通汽车部件有限公司 | A kind of distance rod and its manufacturing method |
| CN110055445A (en) * | 2019-05-17 | 2019-07-26 | 亚太轻合金(南通)科技有限公司 | A kind of high-strength aluminum alloy and preparation method thereof |
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| CN107805747B (en) | 2019-03-08 |
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