CN107815569A - A kind of spindle and preparation method thereof - Google Patents
A kind of spindle and preparation method thereof Download PDFInfo
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- CN107815569A CN107815569A CN201710902515.4A CN201710902515A CN107815569A CN 107815569 A CN107815569 A CN 107815569A CN 201710902515 A CN201710902515 A CN 201710902515A CN 107815569 A CN107815569 A CN 107815569A
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Classifications
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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
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/18—Steering knuckles; King pins
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- 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
- C22C32/0005—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 at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
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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
- C22F1/053—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
Abstract
The present invention relates to a kind of spindle and preparation method thereof, belong to automobile technical field.The spindle of the present invention is made up of aluminium alloy, and the aluminium alloy includes the component of following mass percent：0.6~2.0%Si, 2.0~2.6%Cu, 0~0.05%Mn, 1.8~2.3%Mg, 0.3~0.6%Cr, 2.3~4.6%Zn, 0.06~0.15%Ti, 0.6~0.85Zr, 0.05~0.12%Te, 0~0.05Fe, 5.5~7.5% ceramic powders, 0.12~0.25%RE, surplus Al.Spindle 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 spindle and preparation method thereof.
Background technology
Knuckle is one of strength member in steering axle of automobile, function is to transmit simultaneously because shape reason is also known as " goat's horn "
Automotive front load is born, supports and drives front-wheel to be rotated around stub and make motor turning, makes vehicle steadily traveling and sensitive biography
Travel direction is passed, because the front shock-proof device machine of vehicle is mounted on knuckle, under motoring condition, knuckle also acts as
The effect of automotive front load is born, subjects from multiple directions and changeable shock loading, therefore, there is very high intensity
It is required that.Knuckle is connected by bolt, bushing with vehicle body, and in addition to being connected except center with jackshaft, knuckle is still braked
The installation pedestal of clamp and shock-absorbing machine.The design of genuine knuckle is related to kingpin inclination, front-wheel camber and toe-in angle
Deng with Vehicle handling closely bound up data.Except these, the company of various swing arms and connecting rod in knuckle or suspension
The part connect.The method that knuckle is forged using solid forging or split more at present is manufactured.The method of solid forging
The rigors of vehicle under steam are disclosure satisfy that, however, the rough forging of overall knuckle, manufacturing process is complicated, is processed into
This height, particularly knuckle spindle are entity state, and the state had not only caused the increase of weight but also influenceed heat treatment quenching and tempering process transfer
The quality quenched to nodal axisn core；And solid forging mode blank material wastes greatly, material can not be fully used.Split
The knuckle of forging is made up of framework and main shaft, and, by being suppressed into one after finishing, the connection of its sections bracing with connective positional is strong for both
The size that degree depends on the magnitude of interference of main shaft press-in framework coordinates depth, but the presence of the structure type can travel to vehicle
During bring very big potential safety hazard, used so the knuckle of the structure type is commercially few at present.In addition, split
Formula knuckle needs main shaft being pressed into depth in framework 1/4 or 1/5, and overlapping equally add of its connecting portion turns
To section weight.In addition, framework needs at a relatively high precision in parts process of manufacture with main shaft for processing.On in view of
State defect, also have and use cast iron to be made with the technique of casting on flat, but the production method one be production efficiency than relatively low, typically
Iron liquid casting speed slowly more needs more than 10 seconds, or even could complete within 20 seconds or more cast；Two be due to that poring rate is slow, iron
Liquid can cool down comparatively fast, cause the place of filling iron liquid in die cavity not enrich, shrinkage porosite, shrinkage cavity etc. easily occur causes casting wasted product rate
Compare high, production cost is bigger；Three be due to the casting flaws such as shrinkage porosite, shrinkage cavity be present, and the mechanical performance of casting can be caused to owe
It is good, it is difficult to meet requirement of the spindle to car speed, also in the presence of certain potential safety hazard.
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 spindle.
The purpose of the present invention can be realized by following technical proposal：
A kind of spindle, the spindle are made up of aluminium alloy, and the aluminium alloy includes following quality percentage
The component of ratio：0.6~2.0%Si, 2.0~2.6%Cu, 0~0.05%Mn, 1.8~2.3%Mg, 0.3~0.6%Cr, 2.3
~4.6%Zn, 0.06~0.15%Ti, 0.6~0.85Zr, 0.05~0.12%Te, 0~0.05Fe, 5.5~7.5% ceramics
Powder, 0.12~0.25%RE, surplus Al.
The present invention improves Si, Zr and Ti content, reduces Zn content on the basis of 7055 aluminium alloys.And add
Add Te, ceramic powder and RE, significantly improve the intensity, toughness and impact resistance of pull bar connecting tube.Wherein, fitted in the present invention
The Si and Al of amount can form Al+Si eutectic liquid phases, be favorably improved aluminium alloy casting fluidity；Mg and matrix Al Element generations are big
Measure Mg5Al and Mg5Al8Phase, Mg can be made by heat treatment5Al and Mg5Al8Mutually it is dissolved into alloy matrix aluminum α phases, so as to improve aluminium
The ambient temperature mechanical properties of alloy, but excessive Mg5Al and Mg5Al8Whole solid solutions are mutually difficult to, are gathered in alloy matrix aluminum
Between crystal boundary, the overall mechanical properties of aluminium alloy can be reduced；Mg also can form Mg with Si2Si hardening constituents, hardening constituent is formed with Zn
MgZn2, it can be remarkably reinforced the tensile strength and yield strength of aluminium alloy, but excessive Mg2Si, which meets, causes the crisp of aluminium alloy
Property simultaneously reduces the toughness of aluminium alloy, excessive MgZn2Xiang Zehui reduces the temperature flowing of aluminium alloy, so as to reduce aluminium alloy
Pourability.Appropriate Mn can form Hard Inclusion phase in aluminium alloy, so as to improve the anti-wear performance of aluminium alloy, reduce friction system
Number, the heat resistance of matrix is improved, but excessive Mn easily forms excessive Hard Inclusion with other elements, reduces the mechanics of aluminium alloy
Performance and thermal conductivity.The present invention improves Zr and Ti content, and Zr and Ti can hinder Mg in aluminium alloy by synergy2Si
And MgZn2The recrystal grain of phase is grown up, and prevents the two from forming thick crystal grain and causing tear to act on alloy matrix aluminum.This hair
Bright middle Te addition can accelerate age-hardening, improve the decay resistance of aluminium alloy, but excessive Te can cause casting group
Non-equilibrium crystalline phase increases in knitting, and reduces the degree of supersaturation of aluminium alloy, is unfavorable for the raising of intensity of aluminum alloy.It is ceramic in the present invention
The addition of powder can significantly improve the intensity and shock resistance of aluminium alloy.The appropriate rare earth element added in the present invention can have
Crystal grain thinning is imitated, improves the microstructure form of aluminium alloy, improves casting fluidity, intensity and the plasticity of aluminium alloy.
Preferably, the ceramic powder includes AlN powder and nanometer Al2O3Powder.
The present invention adds AlN powder and nanometer Al simultaneously in aluminium alloy2O3The wetability of powder, AlN and alloy matrix aluminum is good,
There is preferable compatibility with aluminium alloy, micro-deformation, slack interfacial stress, so as to improve can be produced in drawing process
The intensity and shock resistance of aluminium alloy.But AlN limited strengths, therefore the present invention is aided with the nanometer Al with higher intensity2O3
Powder, the two different size form grading relation, when bearing greater impact power, pass through AlN and nanometer Al2O3Buffering step by step
Decay, impulsive force is disperseed to be preferably minimized, so as to enable aluminum alloy to that larger impulsive force can be born.Nanometer Al2O3Addition can also
Effectively suppress the excessive growth of AlN crystal grain, improve the consistency of aluminium alloy.
Preferably, the ceramic powder includes accounting for the AlN powder of aluminium alloy gross mass 3.3~4.6% and accounts for the total matter of aluminium alloy
The nanometer Al of amount 2.2~2.9%2O3Powder.
The present invention is by AlN powder and nanometer Al2O3The addition of powder and the ratio control of the two within the above range, work as nanometer
Al2O3When the addition of powder gradually increases, the bending strength of aluminium alloy dramatically increases, but works as nanometer Al2O3The adding proportion mistake of powder
Gao Shi, the bending strength of aluminium alloy start to reduce.
Preferably, the particle diameter of the AlN powder is 130~500nm, nanometer Al2O3The particle diameter of powder is 30~80nm.
The particle diameter of AlN powder is too small in the present invention, and the characteristic of its rigid particle is too strong, is difficult to produce during Aluminum alloy tensile
Change shape, is unfavorable for the raising of aluminium alloy shock resistance, and particle diameter crosses conference and causes tear to act on alloy matrix aluminum, reduces aluminium
The mechanical property of alloy.Nanometer Al2O3The particle diameter of powder within the above range, can play Grain refinement in aluminium alloy, and
And rigidity characteristic is stronger, particle diameter is excessive not to have Grain refinement.
Preferably, the RE is the nano-powder of one or more mixing in Pr, Gd, Er.
Preferably, the RE is Pr, Gd, Er composite nano powder, the quality of described Pr, Gd, Er in aluminium alloy
Percentage is respectively 0.03~0.06%, 0.05~0.10%, 0.04~0.09%.
The present invention has effectively refined the crystal grain of aluminium alloy, especially by reasonable compatibility RE component and mass percent
The size of the AlSiMgFe strips and granular compound precipitated phase in aluminum alloy organization is reduced, makes it that less chi be presented
It is very little, prevent its larger size from forming the effect of isolating to alloy matrix aluminum, effectively prevent the infringement of Si and Fe to aluminium alloy and make
With.When RE total contents and ratio within the above range when, AlSiMgFe strips and granular compound precipitate size it is smaller and
It is evenly distributed, when RE total contents are too high, strip precipitate size becomes big, shape becomes irregular so that structural homogenity
Decline, so as to add the effect of isolating to matrix.
Another object of the present invention is to provide a kind of preparation method of spindle, described preparation method include with
Lower step,
S1, the raw metal of aluminium alloy is heated into melting under inert gas shielding is alloy molten solution, add ceramic powder and
RE is stirred, and 3~5min is incubated under the Ultrasonic Conditions of 400~500w power；
S2, by alloy molten solution, casting is casting in low-pressure die casting plant, is cooled to room temperature, is then heat-treated
Produce spindle.
The present invention carries out the preparation of spindle using low pressure casting method, and casting good moldability is clear-cut, surface light
Clean, dimensional accuracy is high；Melting is carried out under inert gas shielding can effectively reduce volume gas and slag inclusion, prevent oxidized aluminum alloy,
Ul-trasonic irradiation can improve stirring degree, the cavitation of ultrasonic wave and shock effect can effectively reduce inside it there may be and folder
Miscellaneous bubble, and be advantageous to the floating of slag inclusion, consequently facilitating removing.
Preferably, the inwall of the stalk of the step S2 mesolow Casting Equipments has waveform smooth surface.
Low-pressure die casting plant of the present invention uses the stalk with waveform smooth surface, can effectively buffer a liter liquid process
The pressure of middle alloy molten solution, avoid may caused by spray and splash, disorder flowing, can so that cavity filling process is more steady
The cavity filling process of held stationary under faster filling velocity.
Preferably, casting fills type stage and solidification stages including rising liquid in the step S2, described liter of liquid fills type
Stage applies to alloy molten solution liquid level rises hydraulic coupling, and guarantee filling velocity is 45~50mm/s, after the type that liter liquid fills terminates, in a liter liquid
Increase alloy molten solution liquid level by 0.008~0.010MPa on the basis of pressure fills type supercharging, and the time is 20~50s, described solidifying
Gu the stage applies 50~100MPa pressure, and 100~120min of pressurize to casting.
The present invention uses specific stalk, so as to use higher filling velocity, improves casting efficiency；The present invention
In liter liquid fill after type terminates on the basis of mold filling pressure add certain numerical value fill type supercharging value, ensure that liquid level does not land the beginning
While resting on die top eventually, casting is solidified at lower pressures, improve the smoothness on aluminium alloy castings surface
And consistency, reduce aluminium alloy internal structural flaw.Solidification stages apply the group that certain pressure improves casting to casting
Consistency is knitted, reduces loose, shrinkage cavity defect generation, so as to improve the mechanical property of casting, and has effectively organized casting
The precipitation of middle gas.
Preferably, the heat treatment process is, 430~460 DEG C are first warming up to, 1.5~2.5h is incubated, then heats to
520~580 DEG C, 2~3h is incubated, then room temperature is quickly down to 35~50 DEG C/min speed.
The present invention effectively can be discharged stress by aluminium alloy, be improved aluminium alloy capability, quickly by the way of Fractional Heat-treatment
The mode of cooling effectively prevent excessive growth of the crystal in heat treatment process.
Preferably, while heat treatment in the step S2, apply 50~150MPa pulse inert gas to casting
Pressure, interpulse period are 5~20s.
The present invention heat treatment when to spindle apply pulse inert gas pressure, can effectively refining aluminum alloy crystalline substance
Grain, the defects of eliminating aluminium alloy internal segregation, be mingled with, so as to improve the overall performance of aluminium alloy.
Compared with prior art, the invention has the advantages that：
Spindle is prepared using aluminium alloy, significantly reduces the quality of spindle；Closed by reasonable compatibility aluminium
The component of gold, significantly improve the intensity, toughness and impact resistance of spindle；And by optimizing the preparation work of aluminium alloy
Skill, obtain the spindle 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
Spindle is made up of aluminium alloy in embodiment 1~5, and aluminium alloy includes the group of following mass percentage content
Point：0.6~2.0%Si, 2.0~2.6%Cu, 0~0.05%Mn, 1.8~2.3%Mg, 0.3~0.6%Cr, 2.3~4.6%
Zn, 0.06~0.15%Ti, 0.6~0.85Zr, 0.05~0.12%Te, 0~0.05Fe, 5.5~7.5% ceramic powders, 0.12
~0.25%RE, surplus Al.
Ceramic powder includes accounting for the AlN powder of aluminium alloy gross mass 3.3~4.6% and accounts for aluminium alloy gross mass 2.2~2.9%
Nanometer Al2O3Powder.The particle diameter of AlN powder is 130~500nm, nanometer Al2O3The particle diameter of powder is 30~80nm.
RE is the nano-powder of one or more mixing in Pr, Gd, Er.More preferably the compound of Pr, Gd, Er is received
Ground rice body, the mass percent of described Pr, Gd, Er in aluminium alloy are respectively 0.03~0.06%, 0.05~0.10%, 0.04
~0.09%.
The component of aluminium alloy and other parameters are 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 spindle comprises the following steps in the present embodiment,
(1), raw material are prepared according to the raw material in embodiment 3 and proportioning, by aluminium alloy stock under inert gas shielding
Heating melting is alloy molten solution, adds ceramic powder and RE stirs, 3min is incubated under 400w Ultrasonic Conditions；
(2), alloy molten solution is used into the method for low pressure casting casting is casting in low-pressure die casting plant, low pressure casting
The inwall of the stalk of manufacturing apparatus has waveform smooth surface, and casting then is cooled into room temperature, is then heat-treated i.e.
Obtain spindle,
Casting includes liter liquid and fills type stage and solidification stages, rises liquid and fills the type stage to alloy molten solution liquid level application liter liquid
Pressure, guarantee filling velocity are 45mm/s, after the type that liter liquid fills terminates, to the increase of alloy molten solution liquid level on the basis of liter hydraulic coupling
The 0.008MPa type that fills is pressurized, and time 50s, solidification stages apply 50MPa pressure, and pressurize 120min to casting,
Heat treatment process is first to be warming up to 430 DEG C, is incubated 2.5h, then heats to 520 DEG C, is incubated 3h, then with 35 DEG C/
Min speed is quickly down to room temperature, while heat treatment, applies 50MPa pulse inert gas pressure, pulse spacing to casting
Time is 20s.
Embodiment 7
The preparation method of spindle comprises the following steps in the present embodiment,
(1), raw material are prepared according to the raw material in embodiment 3 and proportioning, by aluminium alloy stock under inert gas shielding
Heating melting is alloy molten solution, adds ceramic powder and RE stirs, 4min is incubated under 450 Ultrasonic Conditions；
(2), alloy molten solution is used into the method for low pressure casting casting is casting in low-pressure die casting plant, low pressure casting
The inwall of the stalk of manufacturing apparatus has waveform smooth surface, and casting then is cooled into room temperature, is then heat-treated i.e.
Obtain spindle,
Casting includes liter liquid and fills type stage and solidification stages, rises liquid and fills the type stage to alloy molten solution liquid level application liter liquid
Pressure, guarantee filling velocity are 46mm/s, after the type that liter liquid fills terminates, to the increase of alloy molten solution liquid level on the basis of liter hydraulic coupling
The 0.009MPa type that fills is pressurized, and time 35s, solidification stages apply 70MPa pressure, and pressurize 110min to casting,
Heat treatment process is first to be warming up to 440 DEG C, is incubated 2.0h, then heats to 540 DEG C, is incubated 2.5h, then with 40
DEG C/min speed is quickly down to room temperature, while heat treatment, apply 100MPa pulse inert gas pressure, pulse to casting
Interval time is 13s.
Embodiment 8
The preparation method of spindle comprises the following steps in the present embodiment,
(1), raw material are prepared according to the raw material in embodiment 3 and proportioning, by aluminium alloy stock under inert gas shielding
Heating melting is alloy molten solution, adds ceramic powder and RE stirs, 4min is incubated under 460w Ultrasonic Conditions；
(2), alloy molten solution is used into the method for low pressure casting casting is casting in low-pressure die casting plant, low pressure casting
The inwall of the stalk of manufacturing apparatus has waveform smooth surface, and casting then is cooled into room temperature, is then heat-treated i.e.
Obtain spindle,
Casting includes liter liquid and fills type stage and solidification stages, rises liquid and fills the type stage to alloy molten solution liquid level application liter liquid
Pressure, guarantee filling velocity are 49mm/s, after the type that liter liquid fills terminates, to the increase of alloy molten solution liquid level on the basis of liter hydraulic coupling
The 0.010MPa type that fills is pressurized, and time 30s, solidification stages apply 80MPa pressure, and pressurize 110min to casting,
Heat treatment process is first to be warming up to 450 DEG C, is incubated 2.0h, then heats to 560 DEG C, is incubated 2.5h, then with 45
DEG C/min speed is quickly down to room temperature, while heat treatment, apply 120MPa pulse inert gas pressure, pulse to casting
Interval time is 15s.
Embodiment 9
The preparation method of spindle comprises the following steps in the present embodiment,
(1), raw material are prepared according to the raw material in embodiment 3 and proportioning, by aluminium alloy stock under inert gas shielding
Heating melting is alloy molten solution, adds ceramic powder and RE stirs, 5min is incubated under 500w Ultrasonic Conditions；
(2), alloy molten solution is used into the method for low pressure casting casting is casting in low-pressure die casting plant, low pressure casting
The inwall of the stalk of manufacturing apparatus has waveform smooth surface, and casting then is cooled into room temperature, is then heat-treated i.e.
Obtain spindle,
Casting includes liter liquid and fills type stage and solidification stages, rises liquid and fills the type stage to alloy molten solution liquid level application liter liquid
Pressure, guarantee filling velocity are 50mm/s, after the type that liter liquid fills terminates, to the increase of alloy molten solution liquid level on the basis of liter hydraulic coupling
The 0.010MPa type that fills is pressurized, and time 20s, solidification stages apply 100MPa pressure, and pressurize 100min to casting,
Heat treatment process is first to be warming up to 460 DEG C, is incubated 1.5h, then heats to 580 DEG C, is incubated 2h, then with 50 DEG C/
Min speed is quickly down to room temperature, while heat treatment, applies 150MPa pulse inert gas pressure to casting, between pulse
It is 5s every the time.
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 spindle.
Comparative example 1
Aluminium alloy is 7055 aluminium alloys, other same as Example 8.
Comparative example 2
AlN powder and nanometer Al are not added with aluminium alloy2O3Powder, it is other same as Example 8.
Comparative example 3
A nanometer Al is not added with aluminium alloy2O3Powder, it is other same as Example 8.
Comparative example 4
The method cast using conventional low voltage prepares spindle, other same as Example 8.
The performance of the spindle prepared in the embodiment of the present invention 6~13, comparative example 1~4 is compared, compares knot
Fruit is as shown in table 3.
Table 3：The comparison of spindle 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 spindle 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 spindle, it is characterised in that the spindle is made up of aluminium alloy, and the aluminium alloy includes following
The component of mass percent：0.6~2.0%Si, 2.0~2.6%Cu, 0~0.05%Mn, 1.8~2.3%Mg, 0.3~
0.6%Cr, 2.3~4.6%Zn, 0.06~0.15%Ti, 0.6~0.85Zr, 0.05~0.12%Te, 0~0.05Fe, 5.5
~7.5% ceramic powder, 0.12~0.25%RE, surplus Al.
2. spindle according to claim 1, it is characterised in that the ceramic powder includes AlN powder and nanometer Al2O3
Powder.
3. spindle according to claim 1 or 2, it is characterised in that the ceramic powder includes accounting for the total matter of aluminium alloy
The AlN powder of amount 3.3~4.6% and the nanometer Al for accounting for aluminium alloy gross mass 2.2~2.9%2O3Powder.
4. spindle according to claim 3, it is characterised in that the particle diameter of the AlN powder is 130~500nm, is received
Rice Al2O3The particle diameter of powder is 30~80nm.
5. spindle according to claim 1, it is characterised in that the RE is the one or more in Pr, Gd, Er
The nano-powder of mixing.
6. spindle according to claim 1 or 5, it is characterised in that the RE is Pr, Gd, Er composite Nano
Powder, the mass percent of described Pr, Gd, Er in aluminium alloy is respectively 0.03~0.06%, 0.05~0.10%, 0.04~
0.09%.
7. a kind of preparation method of the spindle as described in claim 1~6 any claim, it is characterised in that described
Preparation method comprise the following steps,
S1, the raw metal of aluminium alloy is heated into melting under inert gas shielding is alloy molten solution, adds ceramic powder and RE is stirred
Mix uniformly, 3~5min is incubated under the Ultrasonic Conditions of 400~500w power；
S2, by alloy molten solution, casting is casting in low-pressure die casting plant, is cooled to room temperature, then be heat-treated producing
Spindle.
8. preparation method according to claim 7, it is characterised in that the stalk of the step S2 mesolow Casting Equipments
Inwall there is waveform smooth surface.
9. preparation method according to claim 8, it is characterised in that casting fills type including rising liquid in the step S2
Stage and solidification stages, described liter of liquid fill the type stage to alloy molten solution liquid level apply rise a hydraulic coupling, ensure filling velocity be 45~
50mm/s, after the type that liter liquid fills terminates, 0.008~0.010MPa of alloy molten solution liquid level increase is filled on the basis of liter hydraulic coupling
Type is pressurized, and the time be 20~50s, the solidification stages to 50~100MPa of casting application pressure, and pressurize 100~
120min。
10. preparation method according to claim 7, it is characterised in that while heat treatment in the step S2, to automobile
Knuckle applies 50~150MPa pulse inert gas pressure, and interpulse period is 5~20s.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672702A (en) * | 2018-05-21 | 2018-10-19 | 宁波市奇强精密冲件有限公司 | Damper knuckle support |
| CN111074180A (en) * | 2019-12-23 | 2020-04-28 | 安徽悦未科技有限公司 | High-strength pressure-resistant aluminum alloy cast rod for heavy truck hub and preparation process thereof |
| CN111850364A (en) * | 2020-06-23 | 2020-10-30 | 青阳县光大铸造有限公司 | Light high-strength aluminum alloy material for automobile steering knuckle |
| CN116590554A (en) * | 2023-05-19 | 2023-08-15 | 盐城永鑫机械有限公司 | High-performance steering knuckle for vehicle |
| CN116987919A (en) * | 2023-09-22 | 2023-11-03 | 上海嘉朗实业南通智能科技有限公司 | Aluminum alloy die casting for new energy automobile battery shell and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108672702A (en) * | 2018-05-21 | 2018-10-19 | 宁波市奇强精密冲件有限公司 | Damper knuckle support |
| CN111074180A (en) * | 2019-12-23 | 2020-04-28 | 安徽悦未科技有限公司 | High-strength pressure-resistant aluminum alloy cast rod for heavy truck hub and preparation process thereof |
| CN111850364A (en) * | 2020-06-23 | 2020-10-30 | 青阳县光大铸造有限公司 | Light high-strength aluminum alloy material for automobile steering knuckle |
| CN116590554A (en) * | 2023-05-19 | 2023-08-15 | 盐城永鑫机械有限公司 | High-performance steering knuckle for vehicle |
| CN116590554B (en) * | 2023-05-19 | 2024-01-12 | 盐城永鑫机械有限公司 | High-performance steering knuckle for vehicle |
| CN116987919A (en) * | 2023-09-22 | 2023-11-03 | 上海嘉朗实业南通智能科技有限公司 | Aluminum alloy die casting for new energy automobile battery shell and preparation method thereof |
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