CN108215657A - A kind of automotive hub - Google Patents
A kind of automotive hub Download PDFInfo
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- CN108215657A CN108215657A CN201711480129.7A CN201711480129A CN108215657A CN 108215657 A CN108215657 A CN 108215657A CN 201711480129 A CN201711480129 A CN 201711480129A CN 108215657 A CN108215657 A CN 108215657A
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- Prior art keywords
- automotive hub
- aluminium alloy
- wheel
- rim
- hub according
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B21/00—Rims
- B60B21/12—Appurtenances, e.g. lining bands
-
- 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
-
- 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
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2360/00—Materials; Physical forms thereof
- B60B2360/10—Metallic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2360/00—Materials; Physical forms thereof
- B60B2360/10—Metallic materials
- B60B2360/104—Aluminum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/10—Reduction of
- B60B2900/133—Noise
Abstract
The present invention relates to a kind of automotive hubs, belong to the technical field of Automobile Design and manufacture.The automotive hub of the present invention is made of aluminium alloy and including wheel disc and wheel rim, and the centre of wheel disc is provided with centre bore, and wheel rim is disposed with outer rim, bead part and inner rim by outside inwardly；It is formed between bead part and inner rim along annular space circumferentially distributed outside wheel rim, annular space is separated to form multiple gas chambers by the side wall of position in the inner, the through-hole that can be connected to tire inner space is both provided on the upper wall of each gas chamber.The automotive hub of the present invention is provided with resonance sound-absorbing structure and is cast by improved aluminium alloy, has good rigidity and dimensional stability, can obtain better wheel noise reduction performance, and improve wear-resisting and corrosion resisting property.
Description
Technical field
The present invention relates to the technical field of Automobile Design and manufacture, it is more particularly related to a kind of automotive hub.
Background technology
Automotive hub refers to be used to support the cylindrical piece of metal of tire centered on axis in automobile tire, i.e., in wheel
It feels at ease the position of entrucking axis.Automotive hub is the important spare part for connecting brake drum, wheel disc and semiaxis, is usually closed by steel or aluminium
Gold casting is forged.Steel wheel hub is since weight is big, shape is coarse, although the relatively low less use at present of price,
And aluminium alloy wheel hub has the characteristics that light-weight, comfort is good, handsome in appearance, the application percentage on car alreadys exceed at present
90%.The case hardness of aluminium alloy wheel hub is relatively low, and wearability is poor, and it is miscellaneous easily to adhere to dust, dirt etc. on automotive wheel
Matter easily enters the surfaces externally and internally of aluminium alloy wheel hub so as to wear, corrode to lead to appearance by decoration hole, fabrication hole etc.
It generates borrosion hole and gets rusty, although can significantly improve wear-resisting, corrosion resistance using chromic acid salt treatment, Cr VI is one kind
Carcinogen, the at present use of chromate have received stringent limitation, and the prior art develops the non-chromate for substituting chromate
Chemical treatment technology, but the film layer that processing is formed is difficult to meet the requirement under rigor condition, and corrosion resisting property is difficult to meet
Long-term durability requirement of shelter.
Invention content
In order to solve above-mentioned technical problem of the prior art, the purpose of the present invention is to provide a kind of automotive hub and its
Preparation method.
A kind of automotive hub is made of aluminium alloy and including the wheel disc for connecting axle and for installing tire
Wheel rim, the centre of the wheel disc are provided with centre bore, the outside of the centre bore circumferentially it is equally spaced be provided with it is more
A bolt hole；The wheel rim is disposed with outer rim, bead part and inner rim by outside inwardly；It is characterized in that：Institute
It states and is formed between bead part and the inner rim along annular space circumferentially distributed outside the wheel rim, the annular space
Multiple gas chambers are separated to form by the side wall of position in the inner, sky inside tire can be connected to by being both provided on the upper wall of each gas chamber
Between through-hole.
Wherein, the aluminium alloy is Al-Si-Mg line aluminium alloys, and preferably, the element composition of the aluminium alloy is：
The Si of 6.50~7.50wt%, the Mg of 0.35~0.45wt%, the Zr of 0.05~0.20wt%, the Sb of 0.10~0.25wt%, 0
The Cu of~0.10wt%, the Mn of 0~0.10wt%, the Zn of 0~0.10wt%, the Fe of 0~0.15wt% and surplus Al with
And inevitable impurity element.The aluminium alloy carries out the heat treatment process for including solution treatment and ageing treatment, 505~
520 DEG C of progress level-one solution treatment, time are 3.0~6.0 hours, and two level solution treatment is then carried out at 530~550 DEG C, when
Between be 0.5~2.0 hour；Ageing treatment is finally carried out at 170~180 DEG C, the time is 6~10 hours.The aluminium alloy is 20
~100 DEG C of coefficient of thermal expansion is 18.6~20.5 μm (mK)-1, tensile strength can reach 280~315MPa.
Wherein, the automotive hub contains the Mn of 2~10g/L by chemical treatment, the chemically treated aqueous solution2+、
The Fe of 0.5~3.0g/L2+, the phosphate anion of 3~20g/L, the molybdenum acid ion of 1.0~10.0g/L, 1.0~10.0g/L
Nitrate ion.The pH value of the aqueous solution is 1.5~4.0, preferably 1.8~3.5.Chemical treatment formed thickness for 0.1~
2.0 μm of chemical conversion coating.
Wherein, the aqueous solution does not include Cr3+、Cr6+, fluorine and peroxide.
Wherein, the aqueous solution contains dithiocarbamate compound.Preferably, the aqueous solution can be with
The further Co containing 0.1~2.0g/L2+。
Wherein, chemically treated temperature can be the temperature range of room temperature to 90 DEG C, it is preferable that chemically treated temperature is 25
~50 DEG C of temperature range, chemically treated time are 30~300 seconds.
Wherein, the acrylic resin protective film that thickness is 10~100 μm is also formed on chemical conversion coating.
The automotive hub of the present invention has the advantages that：
The automotive hub of the present invention is provided with resonance sound-absorbing structure and is cast by improved aluminium alloy, has good
Rigidity and dimensional stability can obtain better wheel noise reduction performance, and improve corrosion resisting property.
Description of the drawings
Fig. 1 is the schematic cross-sectional view of the automotive hub of the present invention.
Fig. 2 is the side structure schematic view of the automotive hub of the present invention.
Specific embodiment
Automotive hub of the present invention is further elaborated below with reference to specific embodiment, to help this field
Technical staff to the present invention inventive concept, technical solution have more complete, accurate and deep understanding.
As shown in Figure 1, the automotive hub of the present invention, the wheel including being used to connect the wheel disc 20 of axle and for installing tire
Circle 30, the centre of wheel disc 20 is provided with centre bore 10, and the outside of the centre bore 10 is circumferentially equally spaced to be provided with
Multiple bolts hole 21 are additionally provided with multiple lightening holes 22 on the wheel disc 20.Wheel rim 30 is disposed with outer inwardly by outside
Wheel rim 31, bead part 33 and inner rim 32.It is formed between bead part 33 and the inner rim 32 along the wheel rim 30
Outer circumferentially distributed annular space, the annular space are separated to form multiple gas chambers 50 by the side wall 51 of position in the inner, each
The through-hole 52 of tire inner space can be connected to by being both provided on the upper wall of gas chamber 50, and gas chamber 50 can with the perforation of tire inner space
Form cavity resonance sound absorption structure.The automotive hub of the present invention can be obtained by conventional casting, heat treatment and coating process,
In the present invention, it is described along circumferentially distributed annular space outside the wheel rim 30 can by casting and heat treatment procedure it
Between hot-working and welding sequence formed, in application in order to prevent treatment fluid into air inlet chamber 50.In the prior art, because
A356 aluminium alloy good fluidities are widely used in the preparation of cast aluminium alloy gold automotive hub, but the as-cast structure of this kind of aluminium alloy
In often have dendritic coarse crystalline structure, affect intensity and toughness, it is usually rotten by adding in the prior art thus
Element carries out Metamorphism treatment such as Sr, Na and rare earth element, and to obtain good mechanical property, in addition A356 aluminium closes
Gold coefficient of thermal expansion it is higher, also cause the rigidity of wheel hub and dimensional stability poor, affect wheel anti-acoustic capability and
Wear-resisting property etc..And the present invention adds suitable zirconium and antimony on the basis of common A356.2 aluminium alloys during melting,
Do not influence the mobility and casting character of molten aluminium alloy, and be conducive to improve aluminium alloy wheel hub tensile strength and size it is steady
It is qualitative, and then better wheel noise reduction performance can be obtained, and improve wear-resisting property.Specifically, it is described in the present invention
The element of aluminium alloy forms：The Si of 6.50~7.50wt%, the Mg of 0.35~0.45wt%, 0.05~0.20wt% Zr,
The Sb of 0.10~0.25wt%, the Cu of 0~0.10wt%, the Mn of 0~0.10wt%, the Zn of 0~0.10wt%, 0~
The Fe of the 0.15wt% and Al of surplus and inevitable impurity element.In the prior art generally by Sr, Sb, rare earth
Element etc. is used as the alterant of cast aluminium alloy gold, and Zr and Sb is as alloy element in the aluminum-system of the present invention
Addition, and the Zr and Sb that add significantly enhance reinforcing effect compared to the Sb or Zr individually added so that the aluminium alloy
With higher tensile strength, and the coefficient of thermal expansion of aluminium alloy is also reduced, improve thermal stability.As exemplary
Ground, aluminium alloy of the invention can obtain in melting in electromagnetic induction furnace, and the maximum temperature of aluminium alloy is 770 DEG C in fusion process,
A356.2 aluminium alloys can be used in the present invention and carry out melting as raw material, alloy element Sr and Zr are added in fusion process
Inoculation is carried out, NaCl is then added in and carries out Metamorphism treatment, the dosage of NaCl is the 0.5~0.9% of aluminium alloy weight.Casting
The heat treatment process for including solution treatment and ageing treatment is carried out afterwards, specifically, is preferably carried out level-one at 505~520 DEG C and is consolidated
Molten processing, time are 3.0~6.0 hours, and two level solution treatment is then carried out at 530~550 DEG C, and the time is small for 0.5~2.0
When；Ageing treatment is finally carried out at 170~180 DEG C, the time is 6~10 hours.Aluminium alloy of the present invention is at 20~100 DEG C
Coefficient of thermal expansion be 18.6~20.5 μm (mK)-1, tensile strength can reach 280~315MPa, and common rotten
The coefficient of thermal expansion of A356 aluminium alloys is 21.5~22.8 μm (mK)-1。
Embodiment 1
In induction crucible furnace, using A356.2 aluminium alloy ingots as melting raw material, temperature is controlled to be not higher than in fusion process
770 DEG C, and add in Zr and Sb at about 750 DEG C or so and carry out inoculation, Metamorphism treatment is then carried out using NaCl, is then controlled
The temperature of system casting is 670~690 DEG C, and the element composition of the aluminium alloy is：The Mg of Si, 0.39wt% of 6.91wt%,
The Mn of Cu, 0.08wt% of Sb, 0.05wt% of Zr, 0.20wt% of 0.08wt%, Zn, 0.12wt% of 0~0.02wt%
Fe, surplus Al.Heat treatment process is：510 DEG C of solution treatment 5.0 hours, 535 DEG C of solution treatment 1.0 hours；Finally exist
175 DEG C of progress ageing treatments, time are 10 hours.The aluminium alloy is 19.8 μm of (m in 20~100 DEG C of coefficient of thermal expansion
K)-1, tensile strength can reach 293MPa.
Comparative example 1A
In induction crucible furnace, using A356.2 aluminium alloy ingots as melting raw material, temperature is controlled to be not higher than in fusion process
770 DEG C, and add in Sb at about 750 DEG C or so and carry out inoculation, Metamorphism treatment is then carried out using NaCl, and then control
The temperature of system casting is 670~690 DEG C, and the element composition of the aluminium alloy is：The Mg of Si, 0.39wt% of 6.91wt%,
The Fe of the Mn of Cu, 0.08wt% of Sb, 0.05wt% of 0.20wt%, Zn, 0.12wt% of 0~0.02wt%, surplus Al.
Heat treatment process is：510 DEG C of solution treatment 5.0 hours, 535 DEG C of solution treatment 1.0 hours；Finally carried out at timeliness at 175 DEG C
Reason, time are 10 hours.The aluminium alloy is 21.8 μm (mK) in 20~100 DEG C of coefficient of thermal expansion-1, tensile strength is
272MPa。
Comparative example 1B
In induction crucible furnace, using A356.2 aluminium alloy ingots as melting raw material, temperature is controlled to be not higher than in fusion process
770 DEG C, and add in Zr and Sr at about 750 DEG C or so and carry out inoculation, then using NaCl progress Metamorphism treatments, and with
The temperature for controlling casting afterwards is 670~690 DEG C, and the element composition of the aluminium alloy is：Si, 0.39wt%'s of 6.91wt%
The Mn of Cu, 0.08wt% of Sr, 0.05wt% of Zr, 0.20wt% of Mg, 0.08wt%, the Zn of 0~0.02wt%,
The Fe of 0.12wt%, surplus Al.Heat treatment process is：510 DEG C of solution treatment 5.0 hours, 535 DEG C of solution treatment 1.0 hours；
Ageing treatment is finally carried out at 175 DEG C, the time is 10 hours.The aluminium alloy is 21.5 μ in 20~100 DEG C of coefficient of thermal expansion
m·(m·K)-1, tensile strength 276MPa.
In order to assign the good appearance of aluminium alloy automobile hub, weather-proof and corrosion resistance, usually also needed to before manufacture into
Row application is handled, to meet long service and quality requirements.Previous generally use chromic acid salt treatment assigns good appearance
And anticorrosive anti-wear, but Cr VI is a kind of carcinogen, the use of chromate at present has received stringent limitation, existing
There is in technology generally use Zirconium compound such as basic zirconium phosphate to substitute the processing of chromate, however at the chemistry of Zirconium compound
The film layer that reason is formed is often difficult to meet the requirement under rigor condition.The present invention further additionally provides one kind and is suitable for
The chemical treatment method of aluminium alloy automobile hub of the present invention.The chemical treatment aqueous solution of the present invention contains 2~10g/L's
Mn2+, 0.5~3.0g/L Fe2+, the phosphate anion of 3~20g/L, the molybdenum acid ion of 1.0~10.0g/L, 1.0~
10.0g/L nitrate ion.The pH value of chemical pretreatment solution is 1.5~4.0, preferably 1.8~3.5, the chemical treatment water
The pH value of solution can be by adding common sour (such as nitric acid, phosphoric acid) or common alkali (such as sodium hydroxide or hydroxide
Potassium) adjust obtain.The chemical pretreatment solution of the present invention does not include Cr3+、Cr6+, fluorine and peroxide etc., and at the chemistry
It manages aqueous solution further, contains dithiocarbamate compound, such as dimethyl-thiocarbamic acid salt, diethyl sulfide
For carbaminate etc., adding a small amount of dithiocarbamate compound cooperation molybdate use, can to obtain compactness good
The high chemical conversion coating of corrosion resistance.In the present invention, the content of the dithiocarbamate compound is preferably 0.1
~1.0g/L.Preferably, chemical treatment aqueous solution of the invention can also the further Co containing 0.1~2.0g/L2+,
Co2+Introducing can not only adjust the viscosity of chemical pretreatment solution, but also it can participate in the forming process of chemical conversion coating,
And the chemical conversion coating that appearance blackness is high and colour stability is good is advantageously formed, if Co2+Content higher than 2.0g/L will
The corrosion resistance for the chemical conversion coating that can be resulted in reduces.The Mn in the present invention2+Soluble salt may be used to provide,
Such as manganese nitrate etc. can be used, it can not preferably introduce halide ion.As Fe2+, ferrous nitrate, ferrous sulfate can be used
Deng, and phosphoric acid etc. may be used in phosphate anion.Ferrous nitrate, manganese nitrate, sodium nitrate, nitric acid may be used in nitrate ion
Deng.Ammonium molybdate, sodium molybdate etc. may be used in molybdenum acid ion.Aluminium alloy automobile hub of the present invention can pass through dipping
Method is chemically treated, and optionally, activation process can be carried out, such as can to automotive hub before being chemically treated
To be activated using dilute nitric acid solution, the chemical treatment method of the present invention, chemically treated temperature then can be used after washing
Can be the temperature range of room temperature to 90 DEG C, it is preferable that chemically treated temperature is 25~50 DEG C of temperature range, chemically treated
Time is 30~300 seconds, such as can be 60~180 seconds.By above-mentioned chemical treatment, can be formed in surface of aluminum alloy hub black
The chemical conversion coating of color, thickness are 0.1~2.0 μm；Followed by conventional coating, such as airbrush application can be used saturating
For bright acrylic resin film as surfacecti proteon film, the typical thickness of the surfacecti proteon film is 10~100 μm.
Embodiment 2
The table of chemical conversion coating formed below to the chemical treatment method of the present invention on aluminium alloy automobile hub surface
It sees and corrosion resisting property is analyzed (the uncoated acrylic resin surfacecti proteon film in surface).
Using Al-Si-Mg systems of the present invention cast aluminium alloy gold, and use the pros that the length of side is 8mm for 5cm, thickness
Shape aluminum alloy plate materials are right since chemical conversion treatment can realize dipping and the chemical conversion of complex surface as process object
Uniform chemical conversion coating can be formed in surfaces such as the edge of complicated shape, recess portions, thus using aluminium sheet as processing pair
As the analytical conclusions obtained, also it is essentially identical at the chemistry to the part surface of entire automotive hub or automotive hub
Reason therebetween with essentially identical effect, especially has no substantive difference in terms of apparent and corrosion resistance.
By above-mentioned aluminum alloy plate materials first in 1% aqueous solution of nitric acid carry out activation process (if there is spot on surface, can
Conventional cleaning is carried out before activation, such as can be cleaned by alkali cleaning or organic solvent), processing time is 1 minute, so
After wash.Then aluminum alloy plate materials are immersed in using in the chemical treatment aqueous solution (pH is adjusted to 1.8) formed as shown in table 1
Processing 180 seconds, chemically treated temperature are 35 DEG C；It is washed after processing and is dried at 120 DEG C, drying time is 5 points
Clock.
Table 1g/L
Above-described embodiment 2A~F and comparative example 2A~F can obtain chemical conversion coating (the Meng Saier colorations of black
Be worth is 0.5~1.5), and by above-mentioned chemical conversion coating room temperature, relative humidity for place under conditions of 75% two months with
It visually observes less than apparent color change.
By the salt fog of above-described embodiment 2A~F and comparative example 2A~F treated aluminium alloy plate is placed on 5wt%NaCl
It is placed 120 hours in chamber, the area for then measuring each specimen surface generation red rust accounts for the hundred of entire aluminium alloy plate surface area
Divide ratio.By it is no generate red rust situation be evaluated as A, by the percentage for generating red rust be more than 0 and no more than 3% when be evaluated as
B, by the percentage for generating red rust be more than 3% and no more than 10% when be evaluated as C, by generate red rust percentage be more than
10% and no more than 25% when be evaluated as D, by the percentage for generating red rust be more than 25% when be evaluated as E.As a result such as 2 institute of table
Show.
Table 2
On the surface of the chemical conversion coating formed in embodiment 2A~2F after 20 μm of acrylic resin films of coating, use
The salt spray test chamber of 5wt%NaCl carries out salt spray test, it is observed that the time for generating red rust is 1200 hours or more, especially
The time for being embodiment 2D, 2E generation red rust is 1500 hours or more, and the aluminium alloy automobile hub applied to the present invention can be protected
Demonstrate,prove long-term durability requirement of shelter.
For the ordinary skill in the art, specific embodiment is only exemplarily described the present invention,
Obviously the present invention specific implementation is not subject to the restrictions described above, as long as employ the inventive concept and technical scheme of the present invention into
The improvement of capable various unsubstantialities or it is not improved by the present invention design and technical solution directly apply to other occasions
, within protection scope of the present invention.
Claims (10)
1. a kind of automotive hub is made of aluminium alloy and including the wheel disc for connecting axle and the wheel for installing tire
Circle, the centre of the wheel disc are provided with centre bore, the outside of the centre bore circumferentially it is equally spaced be provided with it is multiple
Bolt hole；The wheel rim is disposed with outer rim, bead part and inner rim by outside inwardly；It is characterized in that：It is described
It is formed between bead part and the inner rim along annular space circumferentially distributed outside the wheel rim, the annular space leads to
It crosses the side wall of position in the inner and is separated to form multiple gas chambers, tire inner space can be connected to by being both provided on the upper wall of each gas chamber
Through-hole.
2. automotive hub according to claim 1, it is characterised in that：The aluminium alloy is Al-Si-Mg line aluminium alloys.
3. automotive hub according to claim 2, it is characterised in that：The element of the aluminium alloy forms：6.50~
The Si of 7.50wt%, the Mg of 0.35~0.45wt%, the Zr of 0.05~0.20wt%, the Sb of 0.10~0.25wt%, 0~
The Cu of 0.10wt%, the Mn of 0~0.10wt%, the Zn of 0~0.10wt%, the Fe of 0~0.15wt% and surplus Al and
Inevitable impurity element.
4. automotive hub according to claim 3, it is characterised in that：The aluminium alloy carries out including solution treatment and timeliness
The heat treatment process of processing carries out level-one solution treatment at 505~520 DEG C, and the time is 3.0~6.0 hours, then 530~
550 DEG C of progress two level solution treatment, time are 0.5~2.0 hour；Finally ageing treatment, time 6 are carried out at 170~180 DEG C
~10 hours.
5. automotive hub according to claim 3, it is characterised in that：Thermal expansion system of the aluminium alloy at 20~100 DEG C
Number is 18.6~20.5 μm (mK)-1, tensile strength can reach 280~315MPa.
6. automotive hub according to claim 1, it is characterised in that：The automotive hub is changed by chemical treatment
It learns processing and forms the chemical conversion coating that thickness is 0.1~2.0 μm；The chemically treated aqueous solution contains 2~10g/L's
Mn2+, 0.5~3.0g/L Fe2+, the phosphate anion of 3~20g/L, the molybdenum acid ion of 1.0~10.0g/L, 1.0~
10.0g/L nitrate ion；And the pH value of the aqueous solution is 1.5~4.0.
7. automotive hub according to claim 6, it is characterised in that：The aqueous solution contains dithiocar-bamate
Close object.
8. automotive hub according to claim 6, it is characterised in that：The aqueous solution also Co containing 0.1~2.0g/L2 +。
9. automotive hub according to claim 6, it is characterised in that：Chemically treated temperature for room temperature to 90 DEG C, chemistry
The time of processing is 30~300 seconds.
10. automotive hub according to claim 6, it is characterised in that：It is 10 that thickness is also formed on chemical conversion coating
~100 μm of acrylic resin protective film.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480129.7A CN108215657A (en) | 2017-12-29 | 2017-12-29 | A kind of automotive hub |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480129.7A CN108215657A (en) | 2017-12-29 | 2017-12-29 | A kind of automotive hub |
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| CN108215657A true CN108215657A (en) | 2018-06-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295351A (en) * | 2018-10-31 | 2019-02-01 | 浙江万丰摩轮有限公司 | A kind of pack alloy and its preparation method and application |
| CN111363958A (en) * | 2020-03-26 | 2020-07-03 | 安徽拓普勒汽车科技有限公司 | Novel aluminum alloy wheel hub |
| CN112776530A (en) * | 2021-02-02 | 2021-05-11 | 六和轻合金（昆山）有限公司 | Lightweight and noise reduction aluminum alloy wheel rim |
| CN114941115A (en) * | 2022-04-21 | 2022-08-26 | 大连理工大学 | Heat treatment method of Al-Si-Mg alloy |
-
2017
- 2017-12-29 CN CN201711480129.7A patent/CN108215657A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295351A (en) * | 2018-10-31 | 2019-02-01 | 浙江万丰摩轮有限公司 | A kind of pack alloy and its preparation method and application |
| CN111363958A (en) * | 2020-03-26 | 2020-07-03 | 安徽拓普勒汽车科技有限公司 | Novel aluminum alloy wheel hub |
| CN112776530A (en) * | 2021-02-02 | 2021-05-11 | 六和轻合金（昆山）有限公司 | Lightweight and noise reduction aluminum alloy wheel rim |
| CN114941115A (en) * | 2022-04-21 | 2022-08-26 | 大连理工大学 | Heat treatment method of Al-Si-Mg alloy |
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