CN117107132A - Die-casting aluminum alloy capable of being anodized and application thereof - Google Patents
Die-casting aluminum alloy capable of being anodized and application thereof Download PDFInfo
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- CN117107132A CN117107132A CN202311368391.8A CN202311368391A CN117107132A CN 117107132 A CN117107132 A CN 117107132A CN 202311368391 A CN202311368391 A CN 202311368391A CN 117107132 A CN117107132 A CN 117107132A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 50
- 238000004512 die casting Methods 0.000 title claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 28
- 230000032683 aging Effects 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- -1 aluminum rare earth Chemical class 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 238000005488 sandblasting Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- ZWOQODLNWUDJFT-UHFFFAOYSA-N aluminum lanthanum Chemical compound [Al].[La] ZWOQODLNWUDJFT-UHFFFAOYSA-N 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- HIPVTVNIGFETDW-UHFFFAOYSA-N aluminum cerium Chemical compound [Al].[Ce] HIPVTVNIGFETDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000011777 magnesium Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000007546 Brinell hardness test Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000007373 indentation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000011701 zinc Substances 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 229910019018 Mg 2 Si Inorganic materials 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical class [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction 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
- C22C21/10—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
- 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
-
- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Signal Processing (AREA)
- Forging (AREA)
Abstract
The invention provides a die-casting aluminum alloy capable of being anodized and application thereof, and relates to the technical field of aluminum alloy processing. The die-casting aluminum alloy is prepared from the following components in percentage by weight: si: 0.15-0.35%, mg: 0.4-0.6%, mn: 1.0-3.0%, fe less than or equal to 0.3%, ti:0.05 to 0.15 percent of Zn:2.0 to 4.0 percent of Re: 0.15-0.25%, cr is less than or equal to 0.1%, pb is less than or equal to 0.005%, sn is less than or equal to 0.005%, zr is less than or equal to 0.5%, impurities are less than or equal to 0.5%, and the balance of aluminum, wherein the total amount of Mg/Si in the whole composition is more than or equal to 2%, and the total amount of Mg and Si is more than or equal to 0.7%. The invention overcomes the defects of the prior art, effectively ensures the anodic oxidation performance of the aluminum alloy, improves the casting performance and the mechanical property of the aluminum alloy, simplifies the processing technology, reduces the production cost and comprehensively improves the production economic benefit.
Description
Technical Field
The invention relates to the technical field of aluminum alloy processing, in particular to a die-casting aluminum alloy capable of being anodized and application thereof.
Background
The existing die-casting aluminum alloy has the following characteristics that: the strength is not high; only thick parts can be made and thin parts cannot be made; only can be used as an appearance piece, but not a stress piece; stringent requirements are imposed on die design, die casting process and die casting auxiliary materials; the biggest disadvantage is that the hardness is only 30-40 HB, the casting can not be tapped, the application of materials in different product fields is limited, particularly for the preparation of a mobile phone middle frame, the traditional mobile phone middle frame anodized colored aluminum alloy adopts deformed aluminum alloy, such as 6061, 6063, 6013 and the like, and the materials are processed by CNC and then anodized and colored. The product has the following characteristics: high strength (hardness) and uniform anodic oxidation coloring effect, but long overall processing period and high cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the die-casting aluminum alloy capable of being anodized and the application thereof, which effectively ensure the anodic oxidation performance of the die-casting aluminum alloy, improve the casting performance and the mechanical property of the die-casting aluminum alloy, simplify the processing technology, reduce the production cost and comprehensively improve the production economic benefit.
In order to achieve the above object, the technical scheme of the present invention is realized by the following technical scheme:
an anodized die cast aluminum alloy prepared from the following components in weight percent: si: 0.15-0.35%, mg: 0.4-0.6%, mn: 1.0-3.0%, fe less than or equal to 0.3%, ti:0.05 to 0.15 percent of Zn:2.0 to 4.0 percent of Re: 0.15-0.25%, cr is less than or equal to 0.1%, pb is less than or equal to 0.005%, sn is less than or equal to 0.005%, zr is less than or equal to 0.5%, the total amount of other impurities is less than 0.5%, the balance of aluminum, and the total amount of Mg/Si in the whole component is more than or equal to 2%, and the total amount of Mg and Si is more than or equal to 0.7%.
Preferably, the preparation method of the anodic oxidation die-casting aluminum alloy comprises the following steps:
(1) Preparing raw materials according to the component proportion of the aluminum alloy;
(2) Adding pure aluminum ingot into a furnace, heating, melting and forming aluminum liquid;
(3) Sequentially adding Si, mg, mn, fe, ti, zn, re, cr, pb, sn, zr into the aluminum liquid for refining after melting, then testing and adjusting each component, adding aluminum rare earth intermediate alloy, and standing and casting ingot;
(4) After melting the cast ingot, performing die casting, and performing artificial aging treatment to obtain a die casting;
(5) And (3) removing the appearance surface layer of the die casting by CNC processing, and performing sand blasting on the rear surface to obtain the anodic oxidation die casting aluminum alloy casting.
Preferably, the melting temperature in the step (2) is 750-800 ℃.
Preferably, the aluminum rare earth intermediate alloy in the step (3) is any one of aluminum lanthanum intermediate alloy, aluminum cerium intermediate alloy and aluminum lanthanum cerium intermediate alloy.
Preferably, the die used in the step (4) is a vacuum die, and is provided with a die temperature machine, the die size is increased by 0.20-0.30mm from the single side of the product size, and the die draft is more than or equal to 5 degrees.
Preferably, the temperature of the artificial time-efficient treatment in the step (4) is 170-200 ℃, and the treatment time is 2-3h.
Preferably, the thickness of the appearance surface layer removed by CNC processing in the step (5) is less than or equal to 0.3mm.
Preferably, any one of zirconium sand and glass sand is adopted in the sand blasting treatment in the step (5), and the grain size of the sand is more than or equal to 170 meshes.
The die-casting aluminum alloy capable of being anodized is applied to manufacturing of an integrated mobile phone middle frame after being processed by an anodic oxidation process, and the anodic oxidation process is the same as conventional anodic oxidation processes of 6061, 6063 and the like.
The invention provides a die-casting aluminum alloy capable of anodic oxidation and application thereof, and has the advantages compared with the prior art that:
(1) Compared with the conventional deformed aluminum alloy, the die-casting aluminum alloy prepared by the invention has the advantages of low cost and high efficiency through CNC processing and anodic oxidation coloring, has the advantages of high strength and hardness through artificial aging of castings and comparison with the same aluminum-manganese series and aluminum-magnesium series anodic oxidation coloring die-casting aluminum alloy, has the Brinell hardness of more than or equal to 60, has the yield strength of more than or equal to 140MPa, reaches the level of ADC12, and has wide application prospect.
(2) Although the content of zinc is far higher than that of other elements except aluminum, when silicon, magnesium and zinc exist simultaneously, magnesium can be combined with silicon preferentially, and the content of the silicon and the magnesium is designed reasonably, so that the material can be Mg 2 Si "or" Mg 2 Si+Mg 2 Zn' strengthening phase, when the material needs higher strength, setting magnesium/silicon to be more than or equal to 1.73, and surplus magnesium can be combined with zinc to generate Mg 2 The Zn reinforced phase is provided with the Mg/Si of more than or equal to 2, and the total (Mg+Si) amount of more than or equal to 0.7 percent, so that the yield strength of the casting is more than or equal to 140MPa and the Brinell hardness of the casting is more than or equal to 60 after artificial aging.
(3) The casting produced by the material composition disclosed by the invention is subjected to artificial aging at 170-200 ℃ for 2-3 hours, so that the strength and the hardness are improved, the casting is suitable for thin-wall parts and stressed parts, the hardness of the casting can meet tapping, the application range is widened, and the casting can be effectively applied to production and manufacturing of an integrated mobile phone middle frame.
Drawings
FIG. 1 is a schematic diagram of Brinell hardness test indentation (test 1, test 2, test 3 from left to right, respectively) before artificial aging of a die-cast aluminum alloy according to example 1 of the present invention;
FIG. 2 is a schematic diagram of Brinell hardness test indentation (from left to right, test 1, test 2, test 3 respectively) of the die-cast aluminum alloy according to example 1 after artificial aging;
FIG. 3 is a schematic diagram of Brinell hardness test indentation (from left to right, test 1, test 2, test 3 respectively) of the die-cast aluminum alloy of example 2 of the present invention prior to artificial aging;
FIG. 4 is a schematic diagram of Brinell hardness test indentation (from left to right, test 1, test 2, test 3 respectively) of the die-cast aluminum alloy of example 2 according to the present invention after artificial aging;
FIG. 5 is a schematic diagram of Brinell hardness test indentation (test 1, test 2, test 3 from left to right, respectively) of a die-cast aluminum alloy of example 3 according to the present invention prior to artificial aging;
FIG. 6 is a schematic diagram of Brinell hardness test indentation (from left to right, test 1, test 2, test 3 respectively) of the die-cast aluminum alloy of example 3 after artificial aging;
FIG. 7 is a schematic diagram of Brinell hardness test indentation (test 1, test 2, test 3 from left to right, respectively) of a die-cast aluminum alloy of comparative example 1 prior to artificial aging;
FIG. 8 is a schematic diagram of Brinell hardness test indentation (test 1, test 2, test 3 from left to right, respectively) of a die-cast aluminum alloy according to comparative example 1 after artificial aging;
fig. 9 is a schematic diagram of a mobile phone middle frame prepared by integrally forming an aluminum alloy prepared in embodiment 1 after anodic oxidation.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
preparation of an anodic oxidation die-casting aluminum alloy:
(1) Adding pure aluminum ingot into a furnace, heating to 780 ℃, and melting to form aluminum liquid;
(2) Adding metal alloy components into the aluminum liquid, continuously heating until the metal alloy components are thoroughly melted, refining, testing the reference of each element, adding aluminum lanthanum intermediate alloy, and continuously adjusting the content of each element to Si:0.25%, mg:0.51%, mn:2.0%, fe 0.15%, ti:0.06%, zn:3.0%, re:0.16%, cr:0.02 percent, pb less than or equal to 0.005 percent, sn less than or equal to 0.005 percent, zr:0.17%, the total amount of the rest impurities is less than 0.5%, the balance of aluminum, and the whole component comprises Mg/Si=2.04, (Mg+Si)% =0.76%, and then standing and casting ingot;
(3) After an ingot is melted in a side furnace, a silicone oil-free release agent (SM-830) and silicone oil-free punch oil (SY 01) are used for die casting, a vacuum die is selected in the die casting process to reduce air holes under the die casting skin, the die size is increased by 0.20-0.30mm compared with the single side of the product size, the die drawing gradient is more than or equal to 5 ℃, the temperature of aluminum liquid is controlled to be 750+/-5 ℃ during die casting, a A, B rotary furnace is used for die casting, one melting and one die casting are arranged for two furnaces all the time, the temperature of an AB furnace is kept consistent, no material is added in the die casting process, the humidity of the aluminum liquid is ensured not to fluctuate, and the die casting is obtained after die casting is completed;
(4) The die casting is subjected to artificial aging treatment for 2 hours at 170 ℃, so that the mechanical properties (tensile strength and hardness are improved);
(5) After artificial aging treatment, CNC is adopted to process the appearance surface layer (chilled layer not exceeding 0.3 mm) of the die casting, then 170-mesh zirconium sand is adopted to carry out sand blasting treatment, and finally the aluminum alloy capable of carrying out anodic oxidation is obtained.
Example 2:
the preparation process of this example is the same as that of example 1, the only difference being that the content of each element is adjusted in step (2) as follows:
si:0.3%, mg:0.6%, mn:1.83%, fe:0.08%, ti 0.07%, zn:3.2%, re:0.18%, cr:0.02 percent, pb less than or equal to 0.005 percent, sn less than or equal to 0.005 percent, zr:0.22%, the total amount of the rest impurities is less than 0.5%, the balance of aluminum, and Mg/si=2, (mg+si)% =0.9% in the whole composition.
Example 3:
the preparation process of this example is the same as that of example 1, the only difference being that the content of each element is adjusted in step (2) as follows:
si:0.21%, mg:0.52%, mn:2.30%, fe:0.13%, ti:0.09%, zn:2.95%, re:0.23%, cr:0.04 percent, pb is less than or equal to 0.005 percent, sn is less than or equal to 0.005 percent, zr:0.24%, the total amount of the rest impurities is less than 0.5%, the balance of aluminum, and the Mg/Si in the whole component is more than or equal to 2.48%, wherein (Mg+Si)% =0.73%.
Comparative example 1:
the preparation process of this comparative example is the same as that of example 1, the only difference being that the content of each element in step (2) is adjusted to be:
si:0.23%, mg:0.44%, mn:1.97%, fe:0.19%, ti:0.05%, zn:2.85%, re:0.20%, cr:0.03 percent, pb less than or equal to 0.005 percent, sn less than or equal to 0.005 percent, zr:0.27%, the total amount of the rest impurities is less than 0.5%, the balance of aluminum, and the Mg/Si in the whole component is more than or equal to 1.91%, and (Mg+Si)% =0.67%.
And (3) detection:
1. round bars of 6.4mm diameter were cast by the above-mentioned preparation methods and alloy compositions of examples 1 to 3 and comparative example 1, and the mechanical properties of each round bar before and after the artificial aging treatment (170 ℃ C., 2 h) were measured, respectively, and the specific results are shown in Table 1 below:
TABLE 1
As can be seen from the above table, the aluminum alloy castings produced in examples 1 to 3 have more excellent tensile strength and yield strength than comparative example 1, and the artificial aging treatment can significantly enhance the tensile strength and yield strength of the castings.
2. Die castings were prepared according to the preparation methods and alloy compositions of the above examples 1 to 3 and comparative example 1, and hardness test (brinell hardness tester, load 500 kgf) was performed on the die castings before and after the artificial aging treatment, and each group was tested three times before and after the artificial aging treatment, and the average value was taken, with the results shown in table 2 below:
TABLE 2
As can be seen from Table 2 above, the materials prepared in examples 1-3 are able to significantly increase the hardness of the materials after artificial aging treatment compared to comparative example 1.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The die-casting aluminum alloy capable of being anodized is characterized by comprising a metal alloy component, aluminum and unavoidable impurities, wherein the metal alloy component comprises Si, mg, mn, fe, ti, zn, re, cr, pb, sn, zr, and the die-casting aluminum alloy capable of being anodized is prepared from the following components in percentage by weight: si: 0.15-0.35%, mg: 0.4-0.6%, mn: 1.0-3.0%, fe less than or equal to 0.3%, ti:0.05 to 0.15 percent of Zn:2.0 to 4.0 percent of Re: 0.15-0.25%, cr is less than or equal to 0.1%, pb is less than or equal to 0.005%, sn is less than or equal to 0.005%, zr is less than or equal to 0.5%, the total amount of other impurities is less than 0.5%, the balance of aluminum, and the total amount of Mg/Si in the whole component is more than or equal to 2%, and the total amount of Mg and Si is more than or equal to 0.7%.
2. The die-casting aluminum alloy capable of being anodized according to claim 1, wherein the preparation method of the die-casting aluminum alloy capable of being anodized comprises the following steps:
(1) Preparing raw materials according to the component proportion of the aluminum alloy;
(2) Adding pure aluminum ingot into a furnace, heating, melting and forming aluminum liquid;
(3) Sequentially adding Si, mg, mn, fe, ti, zn, re, cr, pb, sn, zr into the aluminum liquid for refining after melting, then testing and adjusting each component, adding aluminum rare earth intermediate alloy, and standing and casting ingot;
(4) After melting the cast ingot, performing die casting, and performing artificial aging treatment to obtain a die casting;
(5) And (3) removing the appearance surface layer of the die casting by CNC processing, and performing sand blasting on the rear surface to obtain the anodic oxidation die casting aluminum alloy.
3. An anodized die cast aluminum alloy as defined in claim 2, wherein: the melting temperature in the step (2) is 750-800 ℃.
4. An anodized die cast aluminum alloy as defined in claim 2, wherein: the aluminum rare earth intermediate alloy in the step (3) is any one of aluminum lanthanum intermediate alloy, aluminum cerium intermediate alloy and aluminum lanthanum cerium intermediate alloy.
5. An anodized die cast aluminum alloy as defined in claim 2, wherein: the die used in the step (4) is a vacuum die, a die temperature machine is arranged, the die size is increased by 0.20-0.30mm from the single side of the product size, and the draft angle is more than or equal to 5 degrees.
6. An anodized die cast aluminum alloy as defined in claim 2, wherein: the temperature of the human working efficiency treatment in the step (4) is 170-200 ℃, and the treatment time is 2-3h.
7. An anodized die cast aluminum alloy as defined in claim 2, wherein: and (3) the thickness of the appearance surface layer removed by CNC processing in the step (5) is less than or equal to 0.3mm.
8. An anodized die cast aluminum alloy as defined in claim 2, wherein: any one of zirconium sand and glass sand is adopted in the sand blasting treatment in the step (5), and the grain size of the sand is more than or equal to 170 meshes.
9. Use of an anodically oxidizable die-cast aluminum alloy as defined in any one of claims 1-8, characterized by: the die-casting aluminum alloy capable of being anodized is applied to manufacturing of the integrated mobile phone middle frame.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117778822A (en) * | 2024-01-03 | 2024-03-29 | 广东融盈铝业科技有限公司 | High-performance aluminum alloy capable of being anodized, preparation method thereof and anodizing method |
| CN118127390A (en) * | 2024-04-30 | 2024-06-04 | 华劲新材料研究院(广州)有限公司 | Die-casting aluminum alloy, preparation method thereof and application of anodic oxidation |
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| CN112853178A (en) * | 2020-12-31 | 2021-05-28 | 中铝材料应用研究院有限公司 | Anodic oxidation die-casting aluminum alloy and preparation method thereof |
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| CN118127390A (en) * | 2024-04-30 | 2024-06-04 | 华劲新材料研究院(广州)有限公司 | Die-casting aluminum alloy, preparation method thereof and application of anodic oxidation |
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