CN106244863A - A kind of automotive light weight technology top cover Al-alloy casing and preparation method thereof - Google Patents
A kind of automotive light weight technology top cover Al-alloy casing and preparation method thereof Download PDFInfo
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- CN106244863A CN106244863A CN201610755897.8A CN201610755897A CN106244863A CN 106244863 A CN106244863 A CN 106244863A CN 201610755897 A CN201610755897 A CN 201610755897A CN 106244863 A CN106244863 A CN 106244863A
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- top cover
- light weight
- alloy casing
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- technology top
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The present invention relates to a kind of automotive light weight technology top cover Al-alloy casing and preparation method thereof, raw silicon, ferrum, copper, magnesium, zinc, chromium, nickel, stannum, titanium, lead, manganese and aluminum are mixed according to weight proportion, through melting, die casting, product is taken out from die casting machine, carry out trimming, manual cleanup, X flaw detection, ball blast after cooling, carry out whole cleaning, drying and final inspection, dispatch from the factory, obtain product.The automotive light weight technology top cover Al-alloy casing of the present invention use environment be pressure be more than 100 kgfs oil pressure under without deformation and seepage, at the interior porosity ＜ 2% of casting process middle shell；The organizational structure of product is uniform mutually, and interiors of products pore is less than 0.3mm；Hole location is 0.05mm；Product surface does not produce foaming, peeling, is difficult to peeling and comes off under product high temperature after mounting, high pressure.
Description
Technical field
The present invention relates to die casting field, more particularly, to a kind of automotive light weight technology top cover Al-alloy casing and preparation thereof
Method.
Background technology
Automobile top cover housing aluminium casting is material hardness and surface quality and the highest product of product size required precision,
This product is yielding, extrusion process design on need consider use high speed extrusion process, eject, aluminum anodizing process and chi
Very little precision controlling etc..Automobile top cover housing aluminium casting product air holes and deformation are relatively big in the market, and percent defective is higher, causes
Unnecessary manufacturing cost improves.In order to meet the market demand and quality tackle, need interiors of products quality and production capacity are entered
Row precision research and development.
The environment that uses of automobile top cover housing aluminium casting is the oil pressure that pressure is more than 100 kgfs, it is desirable to product is above-mentioned
Without deformation and seepage under pressure, it is desirable to intensity and close could be met very well at the interior porosity ＜ 2% of casting process middle shell
Degree requirement, and in prior art, the porosity of die casting is about 6%, so also needing to more rigorous setting in extrusion process
Meter.
Summary of the invention
It is an object of the invention to for not enough in above-mentioned prior art, it is provided that a kind of automotive light weight technology top cover Al-alloy casing
And preparation method thereof.
In order to realize foregoing invention purpose, the technical solution used in the present invention is as follows:
A kind of automotive light weight technology top cover Al-alloy casing is provided, by following components in percentage by weight group according to the present invention
Become: silicon 8.0-11.0%, ferrum 1.0-1.2%, copper 2.0-4.0%, magnesium≤0.75%, zinc≤1.35%, chromium≤0.30%, nickel≤
0.65%, stannum≤0.40%, titanium≤0.35%, lead≤0.50%, manganese≤0.80%, surplus is aluminum.
Preferably, consist of the following components in percentage by weight: silicon 8.0-11.0%, ferrum 1.1-1.2%, copper 2.0-
4.0%, magnesium≤0.75%, zinc≤1.35%, chromium≤0.30%, nickel≤0.65%, stannum≤0.40%, titanium≤0.35%, lead≤
0.50%, manganese≤0.80%, surplus is aluminum.
Preferably, consist of the following components in percentage by weight: silicon 9-10%, ferrum 1.1-1.2%, copper 3.0-4.0%, magnesium
0.35-0.75%, zinc 1.1-1.35%, chromium 0.15-0.30%, nickel 0.30-0.65%, stannum 0.30-0.40%, titanium 0.25-
0.35%, lead 0.40-0.50%, manganese 0.60-0.80%, surplus is aluminum.
Preferably, consist of the following components in percentage by weight: silicon 8.0%, ferrum 1.1%, copper 2.5%, magnesium 0.35%, zinc
1.0%, chromium 0.10%, nickel 0.25%, stannum 0.20%, titanium 0.15%, lead 0.20%, manganese 0.55%, surplus is aluminum.
Preferably, consist of the following components in percentage by weight: silicon 11.0%, ferrum 1.2%, copper 4.0%, magnesium 0.75%,
Zinc 1.35%, chromium 0.25%, nickel 0.65%, stannum 0.35%, titanium 0.35%, lead 0.45%, manganese 0.80%, surplus is aluminum.
Preferably, consist of the following components in percentage by weight: silicon 10.5%, ferrum 1.1%, copper 3.5%, magnesium 0.65%,
Zinc 1.30%, chromium 0.20%, nickel 0.55%, stannum 0.35%, titanium 0.20%, lead 0.40%, manganese 0.70%, surplus is aluminum.
Preferably, consist of the following components in percentage by weight: silicon 9.5%, ferrum 1.1%, copper 3%, magnesium 0.70%, zinc
1.2%, chromium 0.25%, nickel 0.35%, stannum 0.40%, titanium 0.30%, lead 0.45%, manganese 0.75%, surplus is aluminum.
The preparation method of a kind of automotive light weight technology top cover Al-alloy casing as above of the present invention, including following step
Rapid:
1) smelting furnace is heated to more than 600 DEG C, according to proportioning weight by silicon, ferrum, copper, magnesium, zinc, chromium, nickel, stannum,
Titanium, lead, manganese and aluminum join in burner hearth；
2) continue heating blends material, when the temperature of material to be mixed rises to 690 DEG C ± 10 DEG C, add consumption for mixing
The two-in-one refining agent of low temperature of the 0.1%-0.8% of material carries out refine, is pressed in mixed material liquid by refining agent with bell jar
Carry out circumference to stir 5-15 minute, within static 10-15 minute, prepare die casting；
3) mould is fixed on the active and inactive mold plate of die casting machine, mould is preheated to 160～250 DEG C, in mold cavity
Uniformly spray last layer water based paint, painting type thickness is 0.005-0.008mm, heats and keeps mold temperature to be 120-180 DEG C；
4) by step 3) in the mixed material liquid press-in die that processed, carry out Ultra-Low Speed die casting, vaccum-pumping equipment
Start, in injection process by type chamber air extract out, about 25 seconds cooling after take out part, put into pallet, through 8 hours from
Heat aging, obtains semi-finished product；
5) by step 4) in semi-finished product cooling after carry out trimming, manual cleanup, X flaw detection, ball blast, carry out whole cleaning
Dry and final inspection, obtain automotive light weight technology top cover Al-alloy casing product.
Further, step 3) in the mold cavity surface of mould be provided with projection, the height of described projection is 0.20mm.
Further, step 4) in the technological parameter of Ultra-Low Speed die casting be: system pressure is 12-15MPa, pressurization time
For 10-20s, gassing time is 3-5s, and cast temperature is 640-660 DEG C, and high speed position die casting speed is more than 5m/s.
Add the cooling provision of key position on the mould used in the manufacture method of the present invention, reduce product due to
Stress that wall thickness difference causes is different, thus reduces the deformation of product, stabilizes wanting of interiors of products quality and dimensional accuracy
Ask.
The automotive light weight technology top cover Al-alloy casing of the present invention carries out composition design for case material, aluminum in prior art
In alloy-steel casting, Fe content is about 0.8%, ejects deformation factor to meet product, is risen to by Fe content during composition design
About 1.1%, greatly reduce the degree of product adhesion mould (sticking to mould), thus avoid when being removed from the molds product because of
The deformation that sticking to mould power causes.
The present invention mould to being used has carried out special design: in prior art, product surface easily produce foaming,
Peeling, causes peeling under product high temperature after mounting, high pressure to come off.For drawbacks described above, when Design of Dies by mold cavity surface
Produce the height projection for 0.20mm, stop the defect that during die casting, product surface bubbles, under 400 DEG C of high temperature, product completely
Still do not have bubbling, decortication phenomenon.
The processing mode of the aluminum liquid of the automotive light weight technology top cover Al-alloy casing of the present invention have employed low-temperature refining and processes, and solves
Determine owing to common refine needs to promote the energy resource consumption that temperature of aluminum liquid temperature-fall period again causes.
Manufacture method of the present invention use vaccum-pumping equipment be applied to press casting procedure so that interiors of products pore is less than
0.3mm。
The automotive light weight technology top cover Al-alloy casing of the present invention is at the interior porosity ＜ 2% of casting process middle shell, very
Meet well intensity and density requirements.
Detailed description of the invention
Embodiment 1
A kind of automotive light weight technology top cover Al-alloy casing, consists of the following components in percentage by weight: silicon 9.5%, ferrum
1.1%, copper 3%, magnesium 0.70%, zinc 1.2%, chromium 0.25%, nickel 0.35%, stannum 0.40%, titanium 0.30%, lead 0.45%, manganese
0.75%, surplus is aluminum.
Smelting furnace is heated to more than 600 DEG C, according to said ratio weight by silicon, ferrum, copper, magnesium, zinc, chromium, nickel,
Stannum, titanium, lead, manganese and aluminum join in burner hearth；Continuing heating blends material, the temperature of material to be mixed rises to 690 DEG C ± 10
DEG C time, add the two-in-one refining agent of low temperature of 0.1%-0.8% that consumption is mixed material and carry out refine, with bell jar by refining agent
Press-in mixed material liquid carries out circumference stir 5-15 minute, within static 10～15 minutes, prepare die casting；Mould is fixed on pressure
On the active and inactive mold plate of casting machine, wherein, the mold cavity surface of mould is provided with the height projection for 0.20mm, and mould is preheated to 160
～250 DEG C, in mold cavity, uniformly spraying last layer water based paint, painting type thickness is 0.005～0.008mm, heats and keeps
Mold temperature is 120-180 DEG C；In mixed material liquid press-in die process completed, carry out Ultra-Low Speed die casting, Ultra-Low Speed
The technological parameter of die casting is: system pressure is 12-15MPa, and pressurization time is 10～20s, and gassing time is 3～5s, die casting temperature
Degree is for 640-660 DEG C, and high speed position die casting speed is more than 5m/s.Start vaccum-pumping equipment, by empty in die cavity in injection process
Gas extract out, about 25 seconds cooling after take out part, put into pallet, through 8 hours from heat aging, obtain semi-finished product；By obtain
Carry out trimming, manual cleanup, X flaw detection, ball blast after semi-finished product cooling, carry out whole cleaning, drying and final inspection, obtain automobile light
Quantify top cover Al-alloy casing product.
Wherein, mould adds cooling provision at product key position (such as product wall thickness does not exists together), water of such as loosing core
Cold measure.
Compared with existing product, the automotive light weight technology top cover Al-alloy casing of the present invention is that pressure is more than using environment
Without deformation and seepage under the oil pressure of 100 kgfs, at the interior porosity ＜ 1% of casting process middle shell；The knot of tissue of product
Structure is uniform mutually, and interiors of products pore is less than 0.2mm；Hole location is 0.05mm；Product surface does not produce foaming, peeling, product
It is difficult to peeling under high temperature, high pressure after mounting come off.
Embodiment 2
In the present embodiment, automotive light weight technology top cover Al-alloy casing, consist of the following components in percentage by weight: silicon
8.0%, ferrum 1.1%, copper 2.5%, magnesium 0.35%, zinc 1.0%, chromium 0.10%, nickel 0.25%, stannum 0.20%, titanium 0.15%, lead
0.20%, manganese 0.55%, surplus is aluminum.
Above-mentioned automotive light weight technology top cover Al-alloy casing is obtained by method same as in Example 1.
Compared with existing product, the automotive light weight technology top cover Al-alloy casing of the present invention is that pressure is more than using environment
Without deformation and seepage under the oil pressure of 100 kgfs, at the interior porosity ＜ 2% of casting process middle shell；The knot of tissue of product
Structure is uniform mutually, and interiors of products pore is less than 0.3mm；Hole location is 0.05mm；Product surface does not produce foaming, peeling, product
It is difficult to peeling under high temperature, high pressure after mounting come off.
Embodiment 3
In the present embodiment, automotive light weight technology top cover Al-alloy casing, consist of the following components in percentage by weight: silicon
11.0%, ferrum 1.2%, copper 4.0%, magnesium 0.75%, zinc 1.35%, chromium 0.25%, nickel 0.65%, stannum 0.35%, titanium 0.35%,
Lead 0.45%, manganese 0.80%, surplus is aluminum.
Above-mentioned automotive light weight technology top cover Al-alloy casing is obtained by method same as in Example 1.
Compared with existing product, the automotive light weight technology top cover Al-alloy casing of the present invention is that pressure is more than using environment
Without deformation and seepage under the oil pressure of 100 kgfs, at the interior porosity ＜ 2% of casting process middle shell；The knot of tissue of product
Structure is uniform mutually, and interiors of products pore is less than 0.25mm；Hole location is 0.05mm；Product surface does not produce foaming, peeling, product
It is difficult to peeling under high temperature, high pressure after mounting come off.
Embodiment 4
In the present embodiment, automotive light weight technology top cover Al-alloy casing, consist of the following components in percentage by weight: silicon
10.5%, ferrum 1.1%, copper 3.5%, magnesium 0.65%, zinc 1.30%, chromium 0.20%, nickel 0.55%, stannum 0.35%, titanium 0.20%,
Lead 0.40%, manganese 0.70%, surplus is aluminum.
Above-mentioned automotive light weight technology top cover Al-alloy casing is obtained by method same as in Example 1.
Compared with existing product, the automotive light weight technology top cover Al-alloy casing of the present invention is that pressure is more than using environment
Without deformation and seepage under the oil pressure of 100 kgfs, at the interior porosity ＜ 2% of casting process middle shell；The knot of tissue of product
Structure is uniform mutually, and interiors of products pore is less than 0.28mm；Hole location is 0.05mm；Product surface does not produce foaming, peeling, product
It is difficult to peeling under high temperature, high pressure after mounting come off.
Embodiment 5
In the present embodiment, automotive light weight technology top cover Al-alloy casing, consist of the following components in percentage by weight: silicon
10.5%, ferrum 1.0%, copper 4.0%, magnesium 0.65%, zinc 1.30%, chromium 0.20%, nickel 0.25%, stannum 0.35%, titanium 0.15%,
Lead 0.40%, manganese 0.10%, surplus is aluminum..
Above-mentioned automotive light weight technology top cover Al-alloy casing is obtained by method same as in Example 1.
Compared with existing product, the automotive light weight technology top cover Al-alloy casing of the present invention is that pressure is more than using environment
Without deformation and seepage under the oil pressure of 100 kgfs, at the interior porosity ＜ 2% of casting process middle shell；The knot of tissue of product
Structure is uniform mutually, and interiors of products pore is less than 0.3mm；Hole location is 0.05mm；Product surface does not produce foaming, peeling, product
It is difficult to peeling under high temperature, high pressure after mounting come off.
In embodiment 1-5 use refining agent can be model be the refining agent of HYJD-1F HYJD-2F, such as by middle mountain
Hua Yu nonferrous metallurgy Materials Co., Ltd produces.
The present invention is to control the composition of top cover housing, the tissue uniformity of phase structure, pore opening, to bear pressure, surface
Based on fineness index, by the material choice of analyzing influence product quality, the equipment that produces, processing parameter is adjusted, raw
During product, product quality is required as adjusting thinking and method, at aluminum alloy materials match ratio, extrusion process, mould by correlative factor
The exploitation design of tool and the application of auxiliary equipment evacuation process.Production process is automatically brought into operation related technical data and determines, passes through
Reasonable, the coordination of each correlative factor and each parameter is proved in lab scale and pilot scale, reaches the production technology of end cap.
The foregoing is only presently preferred embodiments of the present invention, be not used for limiting the practical range of the present invention；If do not taken off
From the spirit and scope of the present invention, the present invention is modified or equivalent, all should contain in the claims in the present invention
In the middle of protection domain.
Claims (10)
1. an automotive light weight technology top cover Al-alloy casing, it is characterised in that consist of the following components in percentage by weight: silicon
8.0-11.0%, ferrum 1.0-1.2%, copper 2.0-4.0%, magnesium≤0.75%, zinc≤1.35%, chromium≤0.30%, nickel≤
0.65%, stannum≤0.40%, titanium≤0.35%, lead≤0.50%, manganese≤0.80%, surplus is aluminum.
Automotive light weight technology top cover Al-alloy casing the most according to claim 1, it is characterised in that by following percentage by weight
Component composition: silicon 8.0-11.0%, ferrum 1.1-1.2%, copper 2.0-4.0%, magnesium≤0.75%, zinc≤1.35%, chromium≤
0.30%, nickel≤0.65%, stannum≤0.40%, titanium≤0.35%, lead≤0.50%, manganese≤0.80%, surplus is aluminum.
Automotive light weight technology top cover Al-alloy casing the most according to claim 2, it is characterised in that by following percentage by weight
Component composition: silicon 9-10%, ferrum 1.1-1.2%, copper 3.0-4.0%, magnesium 0.35-0.75%, zinc 1.1-1.35%, chromium
0.15-0.30%, nickel 0.30-0.65%, stannum 0.30-0.40%, titanium 0.25-0.35%, lead 0.40-0.50%, manganese 0.60-
0.80%, surplus is aluminum.
Automotive light weight technology top cover Al-alloy casing the most according to claim 2, it is characterised in that by following percentage by weight
Component composition: silicon 8.0%, ferrum 1.1%, copper 2.5%, magnesium 0.35%, zinc 1.0%, chromium 0.10%, nickel 0.25%, stannum
0.20%, titanium 0.15%, lead 0.20%, manganese 0.55%, surplus is aluminum.
Automotive light weight technology top cover Al-alloy casing the most according to claim 2, it is characterised in that by following percentage by weight
Component composition: silicon 11.0%, ferrum 1.2%, copper 4.0%, magnesium 0.75%, zinc 1.35%, chromium 0.25%, nickel 0.65%, stannum
0.35%, titanium 0.35%, lead 0.45%, manganese 0.80%, surplus is aluminum.
Automotive light weight technology top cover Al-alloy casing the most according to claim 2, it is characterised in that by following percentage by weight
Component composition: silicon 10.5%, ferrum 1.1%, copper 3.5%, magnesium 0.65%, zinc 1.30%, chromium 0.20%, nickel 0.55%, stannum
0.35%, titanium 0.20%, lead 0.40%, manganese 0.70%, surplus is aluminum.
Automotive light weight technology top cover Al-alloy casing the most according to claim 3, it is characterised in that by following percentage by weight
Component composition: silicon 9.5%, ferrum 1.1%, copper 3%, magnesium 0.70%, zinc 1.2%, chromium 0.25%, nickel 0.35%, stannum 0.40%,
Titanium 0.30%, lead 0.45%, manganese 0.75%, surplus is aluminum.
8. a preparation method for the automotive light weight technology top cover Al-alloy casing as described in any one of claim 1-7, its feature
It is, comprises the following steps:
1) smelting furnace is heated to more than 600 DEG C, according to proportioning weight by silicon, ferrum, copper, magnesium, zinc, chromium, nickel, stannum, titanium,
Lead, manganese and aluminum join in burner hearth；
2) continuing heating blends material, when the temperature of material to be mixed rises to 690 DEG C ± 10 DEG C, addition consumption is mixed material
The two-in-one refining agent of low temperature of 0.1%-0.8% carry out refine, with bell jar refining agent is pressed in mixed material liquid and carries out
Circumference stirs 5-15 minute, within static 10-15 minute, prepares die casting；
3) mould is fixed on the active and inactive mold plate of die casting machine, mould is preheated to 160～250 DEG C, in mold cavity uniformly
Spray last layer water based paint, painting type thickness is 0.005-0.008mm, heats and keeps mold temperature to be 120-180 DEG C；
4) by step 3) in the mixed material liquid press-in die that processed, carry out Ultra-Low Speed die casting, vaccum-pumping equipment starts,
Type chamber air is extracted out by injection process, takes out part after cooling in about 25 seconds, put into pallet, when the self-heating of 8 hours
Effect, obtains semi-finished product；
5) by step 4) in semi-finished product cooling after carry out trimming, manual cleanup, X flaw detection, ball blast, carry out whole cleaning, drying
And final inspection, obtain automotive light weight technology top cover Al-alloy casing product.
9. the preparation method of automotive light weight technology top cover Al-alloy casing as claimed in claim 8, it is characterised in that step 3) in
The mold cavity surface of mould be provided with projection, the height of described projection is 0.20mm.
10. the preparation method of automotive light weight technology top cover Al-alloy casing as claimed in claim 8, it is characterised in that step 4)
In the technological parameter of Ultra-Low Speed die casting be: system pressure is 12-15MPa, and pressurization time is 10-20s, and gassing time is 3-
5s, cast temperature is 640-660 DEG C, and high speed position die casting speed is more than 5m/s.
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| CN106756300A (en) * | 2017-01-09 | 2017-05-31 | 重庆长安汽车股份有限公司 | One kind is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method |
| CN107723527A (en) * | 2017-10-17 | 2018-02-23 | 黄河交通学院 | A kind of automotive light weight technology chassis aluminum alloy junction component and preparation method thereof |
| CN108311658A (en) * | 2018-02-08 | 2018-07-24 | 山东弗泽瑞金属科技有限公司 | Vacuum low speed pressure casting method |
| CN108326253A (en) * | 2018-02-02 | 2018-07-27 | 韶关市泰铭压铸有限公司 | A kind of production method of aluminium alloy compression casting motor aluminum hull |
| CN109321789A (en) * | 2018-12-26 | 2019-02-12 | 江苏奋杰有色金属制品有限公司 | A kind of aluminium ingot and its production technology of dense internal organization |
| CN110257675A (en) * | 2019-06-18 | 2019-09-20 | 东莞鸿图精密压铸有限公司 | A kind of high strength die-casting aluminum alloy and preparation method thereof |
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| CN112813315A (en) * | 2020-12-30 | 2021-05-18 | 重庆百吉四兴压铸有限公司 | High-performance transmission box aluminum alloy |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756300A (en) * | 2017-01-09 | 2017-05-31 | 重庆长安汽车股份有限公司 | One kind is without cylinder sleeve aluminium alloy cylinder evacuated die-casting process method |
| CN107723527A (en) * | 2017-10-17 | 2018-02-23 | 黄河交通学院 | A kind of automotive light weight technology chassis aluminum alloy junction component and preparation method thereof |
| CN108326253A (en) * | 2018-02-02 | 2018-07-27 | 韶关市泰铭压铸有限公司 | A kind of production method of aluminium alloy compression casting motor aluminum hull |
| CN108311658A (en) * | 2018-02-08 | 2018-07-24 | 山东弗泽瑞金属科技有限公司 | Vacuum low speed pressure casting method |
| CN110551924A (en) * | 2018-05-30 | 2019-12-10 | 比亚迪股份有限公司 | Aluminum alloy and preparation method and application thereof |
| CN109321789A (en) * | 2018-12-26 | 2019-02-12 | 江苏奋杰有色金属制品有限公司 | A kind of aluminium ingot and its production technology of dense internal organization |
| CN110257675A (en) * | 2019-06-18 | 2019-09-20 | 东莞鸿图精密压铸有限公司 | A kind of high strength die-casting aluminum alloy and preparation method thereof |
| CN112813315A (en) * | 2020-12-30 | 2021-05-18 | 重庆百吉四兴压铸有限公司 | High-performance transmission box aluminum alloy |
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