CN106086546A - The low-pressure casting process of aluminium alloy wheel hub - Google Patents
The low-pressure casting process of aluminium alloy wheel hub Download PDFInfo
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- CN106086546A CN106086546A CN201610727171.3A CN201610727171A CN106086546A CN 106086546 A CN106086546 A CN 106086546A CN 201610727171 A CN201610727171 A CN 201610727171A CN 106086546 A CN106086546 A CN 106086546A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 71
- 238000005266 casting Methods 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 66
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 53
- 238000002844 melting Methods 0.000 claims abstract description 14
- 230000008018 melting Effects 0.000 claims abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 239000002075 main ingredient Substances 0.000 claims abstract description 7
- 238000007872 degassing Methods 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 16
- 239000002826 coolant Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 12
- 239000011777 magnesium Substances 0.000 description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- 229910001278 Sr alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- YNDGDLJDSBUSEI-UHFFFAOYSA-N aluminum strontium Chemical compound [Al].[Sr] YNDGDLJDSBUSEI-UHFFFAOYSA-N 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses the low-pressure casting process of a kind of aluminium alloy wheel hub, low-pressure casting process comprises the following steps: 1) aluminum alloy materials is carried out melting and obtains aluminum liquid, the percentage by weight of aluminum liquid Main Ingredients and Appearance is Si 6.8～7.2, Mg 4.5～5, Ti 0.1～0.15, Fe 0.05～0.1 and the Al of surplus, and the temperature of described melting is 800～950 DEG C；2) mould is preheated to 500 DEG C, and is incubated；3) aluminum liquid starts to come out of the stove at 720～730 DEG C, and through high-purity nitrogen degasification, and low pressure casting machine holding furnace 670～695 DEG C are incubated 1 hour；Being forced into 0.04～0.06Mpa and carry out a liter liquid, the liter liquid time is 5～10s；Being forced into 0.08～0.1Mpa and be full of mold cavity to aluminum liquid, then adjusted by pressure to 0.06～0.07Mpa and carry out pressurize, the dwell time is 200～300s.The characteristic that the aluminium alloy wheel hub made by the present invention has high rigidity, tensile strength is strong and elongation percentage high tenacity is good, and the defect situation such as wheel hub is imperfect, shrinkage cavity, hot tearing and draw is few, substantially increases yield rate.
Description
Technical field
The present invention relates to auto parts and components manufacture field, in particular it relates to the low-pressure casting process of aluminium alloy wheel hub.
Background technology
Along with the development of society, automobile has become people and has gone on a journey the indispensable vehicles, and automotive hub is as automobile
In important accessory, its quality not only affects the attractive in appearance of automobile, and can affect the safety of automobile.Aluminium alloy wheel hub is due to tool
There are many advantages such as lightweight, intensity big, brake compensation performance is good, precision is high, heat conductivity is good, automobile fuel consumption is low, by extensively
The general automotive hub that is applied to manufactures field.
Although the performance of aluminium alloy wheel hub is well more a lot of than steel wheel hub, but al alloy component and the difference of casting technique
The different performance gap also making aluminium alloy wheel hub is the biggest.At present, main on market aluminium alloy wheel hub product generally exists magnesium,
Ferrum, Zn content are many, scaling loss easily occur, and texture material is crisp, easy fracture in melting；And silicone content is many, fusing point is low, tensile strength
Do not reach requirement.The requirement the highest to automotive hub performance in order to meet people, how to improve aluminium alloy wheel hub intensity,
Hardness and plasticity etc. also become the new challenge of aluminium alloy wheel hub exploitation.
Aluminum current alloy cast product produce use low-pressure casting process, low pressure casting to have more die cost is low, the life-span
The advantages such as length, general technology flow process is: first aluminium bar is melted on heat-preserving container aluminum liquid；Then dry compressed gas it is passed through
Body, makes the aluminum liquid of thawing under low pressure enter in mold cavity, and full die cavity；Finally by foundry goods top after aluminum liquid coagulation forming such as grade
Go out.But low pressure casting produce casting hardness low, compactness is poor, tensile strength is little and elongation percentage low be also the obvious of low pressure casting
Shortcoming.
CN105364424A discloses the processing method of a kind of aluminium alloy wheel hub, and the method subtracts by changing al alloy component
Lack magnesium, ferrum, the content of silicon and increase the content of copper, although the method has certain reinforcement to tensile strength, but aluminum can be reduced
The hardness of alloy wheel hub, and increase the probability of casting process medium casting hot tearing.
Therefore, this area still needs to a kind of aluminum alloy wheel that can improve aluminium alloy wheel hub hardness, tensile strength and elongation percentage
The casting technique of hub.
Summary of the invention
It is an object of the invention to overcome the defect in existing aluminium alloy wheel hub manufacturing process, it is provided that a kind of aluminum alloy wheel
The low-pressure casting process of hub, this casting technique can be effectively improved the property such as the hardness of aluminium alloy wheel hub, tensile strength and elongation percentage
Energy.
The present inventor is found by research, can be effectively improved aluminium alloy by improving the content of Magnesium in Aluminum Alloys
The mechanical property of wheel hub, and overcome aluminium alloy content of magnesium to cross by the low-pressure casting process of " cooling of insulation-differentiation " to exceed
Existing fill that type is imperfect, shrinkage cavity, hot tearing and the strong defect of contracting so that dense structure, thus significantly improve the mechanics of aluminium alloy castings
Performance.
To achieve these goals, the present invention provides the low-pressure casting process of a kind of aluminium alloy wheel hub, wherein, low pressure casting
Technique comprises the following steps:
1) aluminum alloy materials is carried out melting and obtains aluminum liquid, the percentage by weight of aluminum liquid Main Ingredients and Appearance be Si 6.8～7.2,
Mg 4.5～5, Ti 0.1～0.15, Fe 0.05～0.1 and the Al of surplus, the temperature of described melting is 800～950 DEG C；
2) mould is preheated to 500 DEG C, and is incubated 0.5 hour；
3) by step 1) aluminum liquid start to come out of the stove at 720～730 DEG C, and through high-purity nitrogen degasification 15 minutes, turn afterwards
Enter low pressure casting machine holding furnace 670～695 DEG C and be incubated 1 hour；It is forced into 0.04～0.06Mpa aluminum liquid entrance stalk to rise
Liquid, the liter liquid time is 5～10s；It is forced into 0.08～0.1Mpa and is full of mold cavity to aluminum liquid, then pressure is adjusted to 0.06
～0.07Mpa carries out pressurize, the dwell time is 200～300s.
In the case of in the present invention, it is preferred to, in step 1) in, the temperature of described melting is 850～900 DEG C.Mg to be obtained
The aluminium alloy that content is higher, can use the conventional method of this area, such as, use the aluminium alloy being purchased to add magnesium powder and melt
Refine.
In the present invention, it is preferred to, in step 3) in, proceed to low pressure casting machine holding furnace 680 DEG C and be incubated 1 hour.Insulation
Make aluminium alloy aluminum liquid more uniform, ensure cast properties equilibrium.
Preferably, in step 3) in, it is forced into 0.04Mpa aluminum liquid entrance stalk and carries out a liter liquid；It is forced into 0.09Mpa extremely
Aluminum liquid is full of mold cavity；Pressure adjusts to 0.07Mpa and carries out pressurize.
So that the common crystallization degree of aluminium alloy is more preferable, to improve the mechanical property of aluminium alloy wheel hub, under preferable case,
Low-pressure casting process also includes step 4): treating that aluminum liquid is full of mold cavity, the lower mold of mould is carried out with the speed of 1.5～2 DEG C/s
It is cooled to 400 DEG C, is cooled to 280 DEG C with the speed of 0.4～0.7 DEG C/s the most again, then air cooling is to room temperature；The limit mould of mould with
The speed of 0.8～1.2 DEG C/s is cooled to 410 DEG C, is then cooled to 300 DEG C with the speed of 0.5～0.7 DEG C/s, then air cooling is to room
Temperature；The upper mold of mould is cooled to 420 DEG C with the speed of 0.6～0.8 DEG C/s, is then cooled to the speed of 0.3～0.5 DEG C/s
300 DEG C, then air cooling is to room temperature.In step 4) in the temperature spot that is previously mentioned all referring to the surface temperature of mould, this temperature can between
The problem connecing reflection foundry goods.Using above-mentioned cooling means different parts to carry out different cooling makes whole foundry goods entirety reach homogeneous
Effect.Above-mentioned cooling means cooperates with above-mentioned pressure maintaining period so that casting hardness, tensile strength and elongation percentage effectively carry
While height, dense structure, and do not have defects such as filling that type is imperfect, shrinkage cavity, hot tearing are strong with contracting.Mould in the present invention
" upper mold ", " limit mould ", " lower mold " are description conventional in the low pressure casting of this area, enter the direction of mould from stalk with aluminum liquid
For " on ".
In the present invention, the method for above-mentioned cooling can be to apply cooling medium, described cooling to the corresponding outside of mould
Medium is compressed air." air cooling " refers to natural cooling in atmosphere.
For aluminium alloy, in current industry, the general Sr of employing goes bad, and this is due to Sr effect eutectiferous to Al-Si relatively
Good, can make eutectic structure is threadiness, and does not use Sr in the present invention, and takes to adjust low-pressure casting process and carry out improving foundry goods
Mechanical property, the existence simultaneously avoiding Sr promotes aluminium alloy air-breathing, and pin hole tendentiousness is big, rotten after aluminum liquid mobility under
Fall.
Compared with prior art, the advantage of the low-pressure casting process of the aluminium alloy wheel hub of the present invention shows: 1, by this
Aluminium alloy wheel hub hardness, tensile strength and the elongation percentage that the technique of invention obtains is effectively improved；2, aluminium alloy wheel hub will not go out
Now fill the defects such as type imperfect, shrinkage cavity, hot tearing and draw, be effectively increased finished product excellent rate.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.But these embodiments be only limitted to illustrate the present invention and not
It it is the further restriction to protection scope of the present invention.Test and raw materials used be all commercially available.
Embodiment 1
The low-pressure casting process of aluminium alloy wheel hub, comprises the following steps:
1) aluminum alloy materials carrying out melting and obtain aluminum liquid, the percentage by weight of aluminum liquid Main Ingredients and Appearance is Si 7.1, Mg
4.9, Ti 0.13, Fe 0.05 and the Al of surplus, the temperature of described melting is 850 DEG C；
2) mould is preheated to 500 DEG C, and is incubated 0.5 hour；
3) by step 1) aluminum liquid start to come out of the stove at 730 DEG C, and through high-purity nitrogen degasification 15 minutes, proceed to low pressure afterwards
Casting machine holding furnace 680 DEG C is incubated 1 hour；Be forced into 0.04Mpa aluminum liquid to enter stalk and carry out a liter liquid, rise the liquid time be 5～
10s；It is forced into 0.09Mpa and is full of mold cavity to aluminum liquid, then pressure is adjusted to 0.07Mpa and carry out pressurize, dwell time
For 280s.
4): treat that aluminum liquid is full of mold cavity, the lower mold of mould carries out being cooled to 400 DEG C with the speed of 2 DEG C/s, the most again with
The speed of 0.4 DEG C/s is cooled to 280 DEG C, then air cooling is to room temperature；The limit mould of mould is cooled to 410 DEG C with the speed of 1 DEG C/s, then
It is cooled to 300 DEG C with the speed of 0.7 DEG C/s, then air cooling is to room temperature；The upper mold of mould is cooled to 420 DEG C with the speed of 0.8 DEG C/s,
Then it is cooled to 300 DEG C with the speed of 0.3 DEG C/s, then air cooling is to room temperature.The method of cooling is to apply to the corresponding outside of mould
Compressed air.
After said method pressurize terminates, being cooled to room temperature the demoulding can obtain aluminium alloy wheel hub A1, and same batch carries out ten
Secondary test.
Embodiment 2
The low-pressure casting process of aluminium alloy wheel hub, comprises the following steps:
1) aluminum alloy materials carrying out melting and obtain aluminum liquid, the percentage by weight of aluminum liquid Main Ingredients and Appearance is Si 6.8, Mg
4.5, Ti 0.15, Fe 0.08 and the Al of surplus, the temperature of described melting is 900 DEG C；
2) mould is preheated to 500 DEG C, and is incubated 0.5 hour；
3) by step 1) aluminum liquid start to come out of the stove at 730 DEG C, and through high-purity nitrogen degasification 15 minutes, proceed to low pressure afterwards
Casting machine holding furnace 670 DEG C is incubated 1 hour；Be forced into 0.06Mpa aluminum liquid to enter stalk and carry out a liter liquid, rise the liquid time be 5～
10s；Being forced into 0.1Mpa and be full of mold cavity to aluminum liquid, then adjusted by pressure to 0.06Mpa and carry out pressurize, the dwell time is
300s。
4): treat that aluminum liquid is full of mold cavity, the lower mold of mould carries out being cooled to 400 DEG C with the speed of 1.5 DEG C/s, the most again
It is cooled to 280 DEG C with the speed of 0.7 DEG C/s, then air cooling is to room temperature；The limit mould of mould is cooled to 410 DEG C with the speed of 1.2 DEG C/s,
Then it is cooled to 300 DEG C with the speed of 0.5 DEG C/s, then air cooling is to room temperature；The upper mold of mould is cooled to the speed of 0.8 DEG C/s
420 DEG C, then it is cooled to 300 DEG C with the speed of 0.4 DEG C/s, then air cooling is to room temperature.Cooling method be to mould accordingly outside
Face applies compressed air.
After said method pressurize terminates, being cooled to room temperature the demoulding can obtain aluminium alloy wheel hub A2, and same batch carries out ten
Secondary test.
Embodiment 3
The low-pressure casting process of aluminium alloy wheel hub, comprises the following steps:
1) aluminum alloy materials is carried out melting and obtains aluminum liquid, the percentage by weight of aluminum liquid Main Ingredients and Appearance is Si 7, Mg 4.5,
Ti 0.14, Fe 0.07 and the Al of surplus, the temperature of described melting is 900 DEG C；
2) mould is preheated to 500 DEG C, and is incubated 0.5 hour；
3) by step 1) aluminum liquid start to come out of the stove at 720 DEG C, and through high-purity nitrogen degasification 15 minutes, proceed to low pressure afterwards
Casting machine holding furnace 695 DEG C is incubated 1 hour；Be forced into 0.05Mpa aluminum liquid to enter stalk and carry out a liter liquid, rise the liquid time be 5～
10s；Being forced into 0.1Mpa and be full of mold cavity to aluminum liquid, then adjusted by pressure to 0.06Mpa and carry out pressurize, the dwell time is
280s。
4): treat that aluminum liquid is full of mold cavity, the lower mold of mould carries out being cooled to 400 DEG C with the speed of 1.5 DEG C/s, the most again
It is cooled to 280 DEG C with the speed of 0.6 DEG C/s, then air cooling is to room temperature；The limit mould of mould is cooled to 410 DEG C with the speed of 0.8 DEG C/s,
Then it is cooled to 300 DEG C with the speed of 0.5 DEG C/s, then air cooling is to room temperature；The upper mold of mould is cooled to the speed of 0.6 DEG C/s
420 DEG C, then it is cooled to 300 DEG C with the speed of 0.5 DEG C/s, then air cooling is to room temperature.Cooling method be to mould accordingly outside
Face applies compressed air.
After said method pressurize terminates, being cooled to room temperature the demoulding can obtain aluminium alloy wheel hub A3, and same batch carries out ten
Secondary test.
Embodiment 4
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 1, except that, do not carry out step 4), obtain aluminum
Alloy wheel hub A4, carries out ten tests equally.
Embodiment 5
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 1, except that, in step 4) in, treat that aluminum liquid fills
Full mold cavity, lower mould, Bian Mo, upper mold all cool down with 2 DEG C/s speed.Obtain aluminium alloy wheel hub A5, carry out equally ten times
Test.
Embodiment 6
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 1, except that, in step 4) in, treat that aluminum liquid fills
Full mold cavity, lower mould with 2 DEG C/s speed be cooled to room temperature, limit mould with 1 DEG C/s speed be cooled to room temperature, upper mold all with
0.8 DEG C/s speed cools down.Obtain aluminium alloy wheel hub A6, carry out ten tests equally.
Comparative example 1
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 4, except that, the weight hundred of aluminum liquid Main Ingredients and Appearance
Proportion by subtraction is Si 7.0, Mg 0.31, Ti 0.10, Fe 0.05 and the Al of surplus, obtains aluminium alloy wheel hub D1, carries out ten equally
Secondary test.
Comparative example 2
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 1, except that, fusion process is additionally added aluminum-strontium
Alloy (Al-Sr10, Sr content is 9.0-11.0%) makes the content of Sr in aluminum liquid be 0.016%, obtains aluminium alloy wheel hub D2,
Carry out ten tests equally.
Comparative example 3
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 1, except that, step 3) in dwell pressure be
0.09Mpa, obtains aluminium alloy wheel hub D2, carries out ten tests equally.
Comparative example 4
Such as the low-pressure casting process of the aluminium alloy wheel hub in embodiment 1, except that, step 3) in be forced into 0.1Mpa
Aluminum liquid enters stalk and carries out a liter liquid, and the liter liquid time is 5～10s；Pressure 0.1Mpa is kept to be full of mold cavity to aluminum liquid, then
Continuing to keep pressure to carry out pressurize, the dwell time is 280s.Obtain aluminium alloy wheel hub D3, carry out ten tests equally.
Test case
Aluminium alloy wheel hub obtained by embodiment 1-6 and comparative example 1-4 is carried out visual inspection and performance test, tool
Body result is as shown in table 1.
Table 1
In Table 1, data are the meansigma methods of same ten groups of data of batch, shrinkage cavity and slight crack (more than or equal to 2mm) and pass through
Range estimation is carried out；The detection of Brinell hardness, tensile strength and elongation percentage is carried out according to GB/T 23301-2009.
As can be seen from the above table, the aluminium alloy wheel hub made by the low-pressure casting process of the aluminium alloy wheel hub of the present invention is had
There is the characteristic that high rigidity, tensile strength are strong and elongation percentage high tenacity is good.And the aluminium alloy wheel hub that this technique manufactures is imperfect,
The defect situation such as shrinkage cavity, hot tearing and draw are few, substantially increase yield rate.
Claims (7)
1. the low-pressure casting process of aluminium alloy wheel hub, it is characterised in that low-pressure casting process comprises the following steps:
1) aluminum alloy materials carrying out melting and obtain aluminum liquid, the percentage by weight of aluminum liquid Main Ingredients and Appearance is Si 6.8～7.2, Mg
4.5～5, Ti 0.1～0.15, Fe 0.05～0.1 and the Al of surplus, the temperature of described melting is 800～950 DEG C；
2) mould is preheated to 500 DEG C, and is incubated 0.5 hour；
3) by step 1) aluminum liquid start to come out of the stove at 720～730 DEG C, and through high-purity nitrogen degasification 15 minutes, proceed to low afterwards
Pressure casting machine holding furnace 670～695 DEG C are incubated 1 hour；It is forced into 0.04～0.06Mpa aluminum liquid entrance stalk and carries out a liter liquid,
The liter liquid time is 5～10s；Be forced into 0.08～0.1Mpa and be full of mold cavity to aluminum liquid, then pressure is adjusted to 0.06～
0.07Mpa carries out pressurize, and the dwell time is 200～300s.
The low-pressure casting process of aluminium alloy wheel hub the most according to claim 1, it is characterised in that in step 3) in, proceed to
Low pressure casting machine holding furnace 680 DEG C is incubated 1 hour.
The low-pressure casting process of aluminium alloy wheel hub the most according to claim 1, it is characterised in that in step 3) in, pressurization
Enter stalk to 0.04Mpa aluminum liquid and carry out a liter liquid.
The low-pressure casting process of aluminium alloy wheel hub the most according to claim 1, it is characterised in that in step 3) in, pressurization
It is full of mold cavity to aluminum liquid to 0.09Mpa.
The low-pressure casting process of aluminium alloy wheel hub the most according to claim 1, it is characterised in that in step 3) in, pressure
Adjust to 0.07Mpa and carry out pressurize.
The low-pressure casting process of aluminium alloy wheel hub the most according to claim 1, it is characterised in that low-pressure casting process also wraps
Include step 4): treating that aluminum liquid is full of mold cavity, the lower mold of mould carries out being cooled to 400 DEG C with the speed of 1.5～2 DEG C/s, then
It is cooled to 280 DEG C with the speed of 0.4～0.7 DEG C/s again, then air cooling is to room temperature；The limit mould of mould is with the speed of 0.8～1.2 DEG C/s
It is cooled to 410 DEG C, is then cooled to 300 DEG C with the speed of 0.5～0.7 DEG C/s, then air cooling is to room temperature；The upper mold of mould is with 0.6
～the speed of 0.8 DEG C/s is cooled to 420 DEG C, then it is cooled to 300 DEG C with the speed of 0.3～0.5 DEG C/s, then air cooling is to room temperature.
7. according to the low-pressure casting process of the aluminium alloy wheel hub described in claim 1-6, it is characterised in that the method for cooling be to
The corresponding outside of mould applies cooling medium, and described cooling medium is compressed air.
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| CN107309413A (en) * | 2017-08-16 | 2017-11-03 | 大亚车轮制造有限公司 | A kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub |
| CN107377939A (en) * | 2017-07-26 | 2017-11-24 | 泰安和新精工科技有限公司 | A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method |
| CN107626904A (en) * | 2017-09-30 | 2018-01-26 | 徐州九鼎机电总厂 | A kind of processing technology of wheel spoke |
| CN107828992A (en) * | 2017-11-14 | 2018-03-23 | 安徽福斯特汽车部件有限公司 | A kind of preparation method of the aluminium alloy wheel hub of low scrappage |
| CN107900312A (en) * | 2017-11-23 | 2018-04-13 | 张永 | A kind of low-pressure casting process of aluminium alloy wheel hub |
| CN107952948A (en) * | 2017-06-12 | 2018-04-24 | 吉林大学 | As-cast aluminum alloy wheel hub low-pressure casting preparation method |
| CN109954867A (en) * | 2017-12-26 | 2019-07-02 | 严凤 | Automotive hub processing method |
| CN110181024A (en) * | 2019-07-09 | 2019-08-30 | 佛山市南海奔达模具有限公司 | Wheel hub low-pressure casting process |
| CN111676404A (en) * | 2020-07-07 | 2020-09-18 | 广东鸿特精密技术（台山）有限公司 | Improved die casting forming method |
| CN113909454A (en) * | 2021-10-09 | 2022-01-11 | 大冶市东晟机械制造有限公司 | Low-pressure casting process for rear hub of alloy automobile |
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Cited By (10)
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| CN107952948A (en) * | 2017-06-12 | 2018-04-24 | 吉林大学 | As-cast aluminum alloy wheel hub low-pressure casting preparation method |
| CN107377939A (en) * | 2017-07-26 | 2017-11-24 | 泰安和新精工科技有限公司 | A kind of Low Pressure Die Casting of Aluminum Wheel Hub technical study method |
| CN107309413A (en) * | 2017-08-16 | 2017-11-03 | 大亚车轮制造有限公司 | A kind of low-pressure casting process of the large scale negative bias away from aluminium alloy wheel hub |
| CN107626904A (en) * | 2017-09-30 | 2018-01-26 | 徐州九鼎机电总厂 | A kind of processing technology of wheel spoke |
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| CN107900312A (en) * | 2017-11-23 | 2018-04-13 | 张永 | A kind of low-pressure casting process of aluminium alloy wheel hub |
| CN109954867A (en) * | 2017-12-26 | 2019-07-02 | 严凤 | Automotive hub processing method |
| CN110181024A (en) * | 2019-07-09 | 2019-08-30 | 佛山市南海奔达模具有限公司 | Wheel hub low-pressure casting process |
| CN111676404A (en) * | 2020-07-07 | 2020-09-18 | 广东鸿特精密技术（台山）有限公司 | Improved die casting forming method |
| CN113909454A (en) * | 2021-10-09 | 2022-01-11 | 大冶市东晟机械制造有限公司 | Low-pressure casting process for rear hub of alloy automobile |
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