CN116770110A - Aluminum alloy die casting and preparation method thereof - Google Patents
Aluminum alloy die casting and preparation method thereof Download PDFInfo
- Publication number
- CN116770110A CN116770110A CN202310750862.5A CN202310750862A CN116770110A CN 116770110 A CN116770110 A CN 116770110A CN 202310750862 A CN202310750862 A CN 202310750862A CN 116770110 A CN116770110 A CN 116770110A
- Authority
- CN
- China
- Prior art keywords
- aluminum
- alloy
- parts
- aluminum alloy
- die casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 115
- 238000004512 die casting Methods 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 34
- 238000007670 refining Methods 0.000 claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000010936 titanium Substances 0.000 claims abstract description 22
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 22
- 229910000521 B alloy Inorganic materials 0.000 claims abstract description 21
- DJPURDPSZFLWGC-UHFFFAOYSA-N alumanylidyneborane Chemical compound [Al]#B DJPURDPSZFLWGC-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 19
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 claims abstract description 19
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 17
- 239000011777 magnesium Substances 0.000 claims abstract description 17
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000011282 treatment Methods 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 18
- 239000003792 electrolyte Substances 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- 238000003723 Smelting Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 13
- -1 aluminum titanium carbon Chemical compound 0.000 claims description 13
- 239000012943 hotmelt Substances 0.000 claims description 13
- 229910001339 C alloy Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 229910000946 Y alloy Inorganic materials 0.000 claims description 11
- RFEISCHXNDRNLV-UHFFFAOYSA-N aluminum yttrium Chemical group [Al].[Y] RFEISCHXNDRNLV-UHFFFAOYSA-N 0.000 claims description 11
- 239000005543 nano-size silicon particle Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 150000002500 ions Chemical class 0.000 claims description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052727 yttrium Inorganic materials 0.000 claims description 8
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 238000007743 anodising Methods 0.000 claims description 5
- 239000012300 argon atmosphere Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 3
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 239000011863 silicon-based powder Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 230000007547 defect Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- 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
- B22D17/007—Semi-solid pressure die casting
-
- 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
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/006—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with use of an inert protective material including the use of an inert gas
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention relates to the technical field of aluminum alloy, in particular to an aluminum alloy die casting and a preparation method thereof; comprises raw materials of 60 to 80 parts of pure aluminum ingot, 10 to 20 parts of pure magnesium ingot, 3 to 8 parts of pure titanium ingot, 20 to 30 parts of aluminum copper alloy, 1 to 3 parts of nanometer silicon powder, 10 to 30 parts of aluminum boron alloy, 5 to 15 parts of refiner and 1 to 3 parts of refiner; the aluminum alloy die casting is obtained through melting, refining, casting, semi-solid die casting forming and anodic oxidation treatment, and the prepared aluminum alloy die casting has larger tensile strength, hardness and yield strength, larger exercise elongation, good mechanical property, high heat deformation temperature, good heat resistance and good corrosion resistance.
Description
Technical Field
The invention relates to the technical field of aluminum alloy, in particular to an aluminum alloy die casting and a preparation method thereof.
Background
Along with the requirements of light weight, energy conservation and emission reduction, the aluminum alloy is increasingly applied to the transportation fields of aerospace, automobiles, ships and the like, has the characteristics of light weight, convenient processing and forming and good material performance, and is one of the preferred materials for light weight. In recent years, aluminum alloy castings are being developed toward large, complex, thin-walled and highly precise integration. The development of aluminum alloy castings is further promoted by automobiles, spacecraft shell parts and engine parts.
The development of aluminum alloy castings and their use in vehicles is increasingly requiring higher mechanical strength, higher temperature resistance, and corrosion resistance of aluminum alloys. At present, the aluminum alloy or the aluminum alloy casting has the defects of air holes, defects and the like in the casting, and the surface compactness degree is insufficient, so that the mechanical strength is insufficient, the service life of the aluminum alloy casting is influenced, and the service strength of the aluminum alloy casting is influenced. In the existing processing technology process of aluminum alloy castings, a hot-pressing casting one-step molding technology is mostly used, molten hydrogen and molten oxygen existing in the aluminum alloy castings cannot be removed well, air holes and defects in the aluminum alloy castings cannot be avoided, further improvement of mechanical strength of the aluminum alloy castings is seriously affected, and in addition, the molten hydrogen and oxygen can also cause corrosion of the aluminum alloy castings.
In order to further improve the mechanical strength of the aluminum alloy casting, meet the requirements of the aluminum alloy casting on high temperature resistance and corrosion resistance, strengthen the hardness and the service life of the aluminum alloy casting, develop an aluminum alloy casting with higher strength, higher hardness, better corrosion resistance and fewer internal pore channels and defects and compact surface from the aspects of raw material proportion and manufacturing process, and have positive significance for promoting the development and application of the aluminum alloy casting.
Disclosure of Invention
The invention aims to provide an aluminum alloy die casting and a preparation method thereof, and the prepared aluminum alloy die casting has the advantages of larger tensile strength, hardness, yield strength, larger exercise elongation, good mechanical property, high heat deformation temperature, good heat resistance and good corrosion resistance.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an aluminum alloy die casting comprises the following raw materials in parts by weight: 60-80 parts of pure aluminum ingot, 10-20 parts of pure magnesium ingot, 3-8 parts of pure titanium ingot, 20-30 parts of aluminum copper alloy, 1-3 parts of nano silicon powder, 10-30 parts of aluminum boron alloy, 5-15 parts of refiner and 1-3 parts of refiner;
the preparation method of the aluminum alloy die casting comprises the following steps:
(1) And (3) hot melting: adding pure aluminum ingots, pure magnesium ingots and pure titanium ingots in parts by weight into a smelting furnace, evacuating nitrogen, heating to 720-780 ℃, slowly stirring until the pure aluminum ingots, the pure magnesium ingots and the pure titanium ingots are completely melted, then adding aluminum copper alloy, nano silicon powder and aluminum boron alloy in parts by weight, intermittently stirring the materials to a molten state, and fishing out and deslagging to form a hot-melt mixture;
(2) Refining: adding a refiner in parts by weight into the hot melt mixture, spraying the refiner in parts by weight, changing argon atmosphere, and refining for 2-4 hours at 750-800 ℃ to obtain aluminum alloy melt;
(3) Casting: heating the die to 500-600 ℃, pouring the aluminum alloy melt into the die, and naturally cooling to 450-500 ℃ to obtain semi-solid aluminum alloy;
(4) Semi-solid die casting: transferring the semi-solid aluminum alloy into a die casting machine, vacuumizing, performing hot die casting forming, and cooling to room temperature to obtain an aluminum alloy rough blank;
(5) Anodizing: placing the aluminum alloy rough blank into electrolyte, introducing direct current, carrying out anodic oxidation treatment for 1-3 h, transferring into a hole sealing agent, sealing the hole for 20-40 min at normal temperature, taking out, cleaning the electrolyte and the hole sealing agent on the surface, and airing to obtain the aluminum alloy die casting.
Further optimizing, the mass fraction of copper in the aluminum-copper alloy is 3-15%, and the mass fraction of boron in the aluminum-boron alloy is 30-50%.
Further optimizing, wherein the refiner is aluminum yttrium alloy, aluminum titanium carbon alloy and aluminum bait alloy according to the mass ratio of 2:1:2 to 3, namely, the mass percent of yttrium in the aluminum yttrium alloy is 10 percent, the mass percent of titanium in the aluminum titanium carbon alloy is 5 percent, the mass percent of carbon is 0.2 percent, and the mass percent of bait in the aluminum bait alloy is 10 percent.
Further optimizing, the refining agent is a mixture, which contains 10 to 20 percent of NaNO by mass 3 10 to 20 percent of nano graphite powder and 10 to 20 percent of Na 2 SiF 6 AlF of the remaining mass 6 。
And (3) further optimizing, in the hot melting in the step (1), after the nitrogen is exhausted, continuously introducing nitrogen into the smelting furnace, keeping the smelting furnace under the nitrogen atmosphere, and stirring for 5-20 circles every 2 min.
Further optimizing, in the refining of the step (2), intermittently salvaging and deslagging in the refining process, and salvaging and deslagging once every 1 h.
Further optimizing, in the semi-solid die casting in the step (4), vacuumizing to ensure that the vacuum degree is less than or equal to 80mbar, performing hot die casting molding, wherein the temperature is 400-600 ℃, the pressure is 80-90 Mpa, and maintaining the pressure for 2-3 min after pressurizing.
Further optimizing, wherein the step (5) is anodic oxidation treatment, and polishing is required to be carried out on the aluminum alloy rough blank before the anodic oxidation treatment; the electrolyte is one of oxalic acid, chromic acid and sulfuric acid, and the concentration of the electrolyte is 120-200 g/L; the voltage of the direct current is 15-30V, and the current density is 0.5-3A; the hole sealing agent is nickel hole sealing agent solution, wherein the concentration of Ni ions is 0.8-1.2 g/L, F ion concentration is 0.35-0.6 g/L, the rest is deionized water, and the PH value is 5.6-6.5.
The invention has the beneficial effects that:
1. the aluminum alloy die casting is obtained by melting, casting, semi-solid die casting forming and anodic oxidation treatment of a pure aluminum ingot, a pure magnesium ingot, a pure titanium ingot, an aluminum copper alloy, nano silicon powder and an aluminum boron alloy, and has higher hardness, high strength and good corrosion resistance; the melting point of the aluminum-boron alloy is lower than that of boron, the aluminum-boron alloy can be melted at a temperature which is not very high, boron elements are doped into the aluminum alloy, in addition, aluminum-silicon alloy phases, aluminum-magnesium alloy phases, aluminum-copper alloy phases, aluminum-boron alloy phases and aluminum-magnesium-copper-silicon-boron mixed phases can be formed in the aluminum alloy, the aluminum-silicon alloy phases have higher melting points, the aluminum-copper alloy phases and the aluminum-boron alloy phases have higher hardness and good mechanical properties, various alloy phases are matched with each other, the mechanical properties of aluminum alloy pressing are improved, the defects of air holes and the like brought to aluminum alloy die castings in the traditional die casting process are reduced, the mechanical strength of the aluminum alloy is enhanced, and the anodic oxidation treatment further enhances the strength, the hardness and the corrosion resistance of the surfaces of the aluminum alloy die castings.
2. The refiner is aluminum yttrium alloy, aluminum titanium carbon alloy and aluminum bait alloy, the aluminum titanium carbon alloy has a good effect of refining grains, yttrium and bait are rare earth elements, the use of yttrium can enable an aluminum alloy structure to be finer, oxidation resistance and ductility of the aluminum alloy can be improved, in addition, yttrium can enable the surface of the aluminum alloy to form a compact oxidation resistant layer, oxygen can be prevented from being further diffused into the aluminum alloy, and corrosion resistance of an aluminum alloy casting is improved; the use of the bait can form Al3Er, can obviously refine alloy as-cast grains, can inhibit recrystallization to a certain extent, improves the thermal stability of the alloy, and has the final effects of improving the strength, corrosion resistance and heat resistance of the aluminum alloy casting.
3. In the refining process, a refining agent and argon are used, the refining agent can generate gas which is not melted in aluminum alloy liquid at high temperature to remove gas in liquid metal, the gas is easy to react with hydrogen, has strong adsorption capacity with slag inclusion, can be separated from the liquid metal to play a refining role, and in addition, the argon is inactive gas to play a refining effect on the liquid aluminum alloy.
4. The semi-solid die casting method is used for vacuumizing in the die casting process, so that gases such as hydrogen, oxygen and the like in the semi-solid aluminum alloy leave the aluminum alloy, the gases in the aluminum alloy are reduced, the gas holes and defects caused by the gases are reduced, the reduction of mechanical properties caused by the gas holes and defects is reduced, the corrosion of corrosive gases to the aluminum alloy casting is reduced, the aluminum alloy forms a uniform and stable structure, and the aluminum alloy is matched with the refining process, so that the mechanical properties and corrosion resistance of the aluminum alloy casting are improved.
5. In addition, the surface of the compact oxide layer has higher hardness and strength compared with the aluminum alloy, and the mechanical property and the corrosion resistance of the aluminum alloy casting are further improved.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are only some, but not all, of the embodiments of the present invention. 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
An aluminum alloy die casting comprises the following raw materials in parts by weight: 60 parts of pure aluminum ingot, 10 parts of pure magnesium ingot, 3 parts of pure titanium ingot, 20 parts of aluminum-copper alloy, 1 part of nano silicon powder, 10 parts of aluminum-boron alloy, 5 parts of refiner and 1 part of refiner;
the mass fraction of copper in the aluminum-copper alloy is 3%, and the mass fraction of boron in the aluminum-boron alloy is 30%; the refiner is aluminum yttrium alloy, aluminum titanium carbon alloy and aluminum bait alloy according to the mass ratio of 2:1:2, namely 10 percent of yttrium in the aluminum-yttrium alloy, 5 percent of titanium in the aluminum-titanium-carbon alloy, 0.2 percent of carbon and 10 percent of bait in the aluminum-bait alloy; the refining agent is a mixture containing 10% by mass of NaNO 3 10% by mass of nano graphite powder and 10% by mass of Na 2 SiF 6 AlF of the remaining mass 6 ；
The preparation method of the aluminum alloy die casting comprises the following steps:
(1) And (3) hot melting: adding pure aluminum ingots, pure magnesium ingots and pure titanium ingots in parts by weight into a smelting furnace, evacuating nitrogen, continuing to introduce nitrogen into the smelting furnace after evacuating nitrogen, keeping the smelting furnace under the nitrogen atmosphere, heating to 720 ℃, slowly stirring until the aluminum ingots, the pure magnesium ingots and the pure titanium ingots are completely melted, then adding aluminum copper alloy, nano silicon powder and aluminum boron alloy in parts by weight, intermittently stirring for every 2min, stirring for 5 circles until the aluminum ingots are in a molten state, and fishing and deslagging to form a hot-melt mixture;
(2) Refining: adding a refiner in parts by weight into the hot melt mixture, spraying the refiner in parts by weight into the hot melt mixture, refining for 2 hours at 750 ℃ by using argon atmosphere, and carrying out intermittent salvaging and deslagging in the refining process, wherein the salvaging and deslagging are carried out once every 1 hour to obtain aluminum alloy melt;
(3) Casting: heating the die to 500 ℃, pouring the aluminum alloy melt into the die, and naturally cooling to 450 ℃ to obtain semi-solid aluminum alloy;
(4) Semi-solid die casting: transferring the semi-solid aluminum alloy into a die casting machine, vacuumizing to ensure that the vacuum degree is less than or equal to 80mbar, performing hot die casting forming, wherein the temperature is 400 ℃, the pressure is 80Mpa, pressurizing and then maintaining the pressure for 2min, and cooling to room temperature to obtain an aluminum alloy rough blank;
(5) Anodizing: polishing the aluminum alloy rough blank, and putting the aluminum alloy rough blank into electrolyte, wherein the electrolyte is oxalic acid, and the concentration of the acid is 120g/L; introducing direct current with the voltage of 15V and the current density of 0.5A, and performing anodic oxidation treatment for 1h; transferring the aluminum alloy die casting into a hole sealing agent, wherein the hole sealing agent is a nickel hole sealing agent solution, the concentration of Ni ions is 0.8g/L, F ion concentration is 0.35g/L, the rest is deionized water, the PH value is 5.6, hole sealing is carried out at normal temperature for 20min, taking out, cleaning electrolyte and hole sealing agent on the surface, and airing to obtain the aluminum alloy die casting.
Example 2
An aluminum alloy die casting comprises the following raw materials in parts by weight: 80 parts of pure aluminum ingot, 20 parts of pure magnesium ingot, 8 parts of pure titanium ingot, 30 parts of aluminum copper alloy, 3 parts of nano silicon powder, 30 parts of aluminum boron alloy, 15 parts of refiner and 3 parts of refiner;
the mass fraction of copper in the aluminum-copper alloy is 15%, and the mass fraction of boron in the aluminum-boron alloy is 50%; the refiner is aluminum yttrium alloy, aluminum titanium carbon alloy and aluminum bait alloy according to the mass ratio of 2:1:3, namely 10 percent of yttrium in the aluminum-yttrium alloy, 5 percent of titanium in the aluminum-titanium-carbon alloy, 0.2 percent of carbon and 10 percent of bait in the aluminum-bait alloy; the refining agent is a mixture containing 20% massAmount of NaNO 3 20% by mass of nano graphite powder and 20% by mass of Na 2 SiF 6 AlF of the remaining mass 6 ；
The preparation method of the aluminum alloy die casting comprises the following steps:
(1) And (3) hot melting: adding pure aluminum ingots, pure magnesium ingots and pure titanium ingots in parts by weight into a smelting furnace, evacuating nitrogen, continuing to introduce nitrogen into the smelting furnace after evacuating nitrogen, keeping the smelting furnace under the nitrogen atmosphere, heating to 780 ℃, slowly stirring until the aluminum ingots, the pure magnesium ingots and the pure titanium ingots are completely melted, then adding aluminum copper alloy, nano silicon powder and aluminum boron alloy in parts by weight, intermittently stirring for every 2min, stirring for 20 circles until the aluminum ingots are in a molten state, and fishing and deslagging to form a hot-melt mixture;
(2) Refining: adding a refiner in parts by weight into the hot melt mixture, spraying the refiner in parts by weight into the hot melt mixture, changing the argon atmosphere into the refining for 4 hours at 800 ℃, intermittently salvaging and deslagging in the refining process, and salvaging and deslagging once every 1 hour to obtain aluminum alloy melt;
(3) Casting: heating the die to 600 ℃, pouring the aluminum alloy melt into the die, and naturally cooling to 500 ℃ to obtain semi-solid aluminum alloy;
(4) Semi-solid die casting: transferring the semi-solid aluminum alloy into a die casting machine, vacuumizing to ensure that the vacuum degree is less than or equal to 80mbar, performing hot die casting forming, wherein the temperature is 600 ℃, the pressure is 90Mpa, pressurizing and then maintaining the pressure for 3min, and cooling to room temperature to obtain an aluminum alloy rough blank;
(5) Anodizing: polishing the aluminum alloy rough blank, and putting the aluminum alloy rough blank into electrolyte, wherein the electrolyte is chromic acid, and the concentration of the acid is 200g/L; introducing direct current with the voltage of 30V and the current density of 3A, and performing anodic oxidation treatment for 3h; transferring the aluminum alloy die casting into a hole sealing agent, wherein the hole sealing agent is a nickel hole sealing agent solution, the concentration of Ni ions is 1.2g/L, F ion concentration is 0.6g/L, the rest is deionized water, the PH value is 6.5, hole sealing is carried out at normal temperature for 40min, taking out, cleaning electrolyte and hole sealing agent on the surface, and airing to obtain the aluminum alloy die casting.
Example 3
An aluminum alloy die casting comprises the following raw materials in parts by weight: 70 parts of pure aluminum ingot, 15 parts of pure magnesium ingot, 5 parts of pure titanium ingot, 25 parts of aluminum copper alloy, 2 parts of nano silicon powder, 20 parts of aluminum boron alloy, 10 parts of refiner and 2 parts of refiner;
the mass fraction of copper in the aluminum-copper alloy is 7%, and the mass fraction of boron in the aluminum-boron alloy is 40%; the refiner is aluminum yttrium alloy, aluminum titanium carbon alloy and aluminum bait alloy according to the mass ratio of 2:1:3, namely 10 percent of yttrium in the aluminum-yttrium alloy, 5 percent of titanium in the aluminum-titanium-carbon alloy, 0.2 percent of carbon and 10 percent of bait in the aluminum-bait alloy; the refining agent is a mixture containing 15% by mass of NaNO 3 15% by mass of nano graphite powder and 15% by mass of Na 2 SiF 6 AlF of the remaining mass 6 ；
The preparation method of the aluminum alloy die casting comprises the following steps:
(1) And (3) hot melting: adding pure aluminum ingots, pure magnesium ingots and pure titanium ingots in parts by weight into a smelting furnace, evacuating nitrogen, continuing to introduce nitrogen into the smelting furnace after evacuating nitrogen, keeping the smelting furnace under the nitrogen atmosphere, heating to 750 ℃, slowly stirring until the aluminum ingots, the pure magnesium ingots and the pure titanium ingots are completely melted, then adding aluminum copper alloy, nano silicon powder and aluminum boron alloy in parts by weight, intermittently stirring for every 2min, stirring for 15 circles until the aluminum ingots are in a molten state, and fishing and deslagging to form a hot-melt mixture;
(2) Refining: adding a refiner in parts by weight into the hot melt mixture, spraying the refiner in parts by weight into the hot melt mixture, changing the argon atmosphere into the refining for 3 hours at 780 ℃, intermittently salvaging and deslagging in the refining process, and salvaging and deslagging once every 1 hour to obtain aluminum alloy melt;
(3) Casting: heating the die to 550 ℃, pouring the aluminum alloy melt into the die, and naturally cooling to 470 ℃ to obtain semi-solid aluminum alloy;
(4) Semi-solid die casting: transferring the semi-solid aluminum alloy into a die casting machine, vacuumizing to ensure that the vacuum degree is less than or equal to 80mbar, hot-pressing and casting, wherein the temperature is 500 ℃, the pressure is 85Mpa, pressurizing and then maintaining the pressure for 2min, and cooling to room temperature to obtain an aluminum alloy rough blank;
(5) Anodizing: polishing the aluminum alloy rough blank, and putting the aluminum alloy rough blank into electrolyte, wherein the electrolyte is sulfuric acid, and the concentration of the sulfuric acid is 160g/L; introducing direct current with the voltage of 20V and the current density of 2A, and performing anodic oxidation treatment for 2h; transferring the aluminum alloy die casting into a hole sealing agent, wherein the hole sealing agent is a nickel hole sealing agent solution, the concentration of Ni ions is 1.0g/L, F ion concentration is 0.4g/L, the rest is deionized water, the PH value is 6.0, hole sealing is carried out at normal temperature for 30min, taking out, cleaning electrolyte and hole sealing agent on the surface, and airing to obtain the aluminum alloy die casting.
And (3) testing:
comparative example 1: no refining agent and no refining agent were added, and the other conditions were the same as in example 1;
comparative example 2: the semi-solid die casting is not performed, the direct casting molding is performed, and the other conditions are the same as those of the embodiment 1;
the aluminum alloy castings prepared in examples 1 to 3 and comparative examples 1 to 2 were examined, the heat distortion temperature was 40MPa, and the heat distortion temperature was recorded; the corrosion resistance is that under the condition that the oxygen concentration is 80%, the temperature is 80 ℃, the steel is placed for 48 hours, taken out and the surface corrosion condition is seen, and the obtained results are shown in the table:
as shown in the table above, the aluminum alloy casting prepared by the method has the advantages of higher tensile strength, higher hardness and higher yield strength, higher exercise elongation, good mechanical property, high heat deformation temperature, good heat resistance and good corrosion resistance.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The aluminum alloy die casting is characterized by comprising the following raw materials in parts by weight: 60-80 parts of pure aluminum ingot, 10-20 parts of pure magnesium ingot, 3-8 parts of pure titanium ingot, 20-30 parts of aluminum copper alloy, 1-3 parts of nano silicon powder, 10-30 parts of aluminum boron alloy, 5-15 parts of refiner and 1-3 parts of refiner;
the preparation method of the aluminum alloy die casting comprises the following steps:
(1) And (3) hot melting: adding pure aluminum ingots, pure magnesium ingots and pure titanium ingots in parts by weight into a smelting furnace, evacuating nitrogen, heating to 720-780 ℃, slowly stirring until the pure aluminum ingots, the pure magnesium ingots and the pure titanium ingots are completely melted, then adding aluminum copper alloy, nano silicon powder and aluminum boron alloy in parts by weight, intermittently stirring the materials to a molten state, and fishing out and deslagging to form a hot-melt mixture;
(2) Refining: adding a refiner in parts by weight into the hot melt mixture, spraying the refiner in parts by weight, changing argon atmosphere, and refining for 2-4 hours at 750-800 ℃ to obtain aluminum alloy melt;
(3) Casting: heating the die to 500-600 ℃, pouring the aluminum alloy melt into the die, and naturally cooling to 450-500 ℃ to obtain semi-solid aluminum alloy;
(4) Semi-solid die casting: transferring the semi-solid aluminum alloy into a die casting machine, vacuumizing, performing hot die casting forming, and cooling to room temperature to obtain an aluminum alloy rough blank;
(5) Anodizing: placing the aluminum alloy rough blank into electrolyte, introducing direct current, carrying out anodic oxidation treatment for 1-3 h, transferring into a hole sealing agent, sealing the hole for 20-40 min at normal temperature, taking out, cleaning the electrolyte and the hole sealing agent on the surface, and airing to obtain the aluminum alloy die casting.
2. The aluminum alloy die casting according to claim 1, wherein the aluminum-copper alloy comprises 3-15% of copper by mass and the aluminum-boron alloy comprises 30-50% of boron by mass.
3. The aluminum alloy die casting according to claim 1, wherein the refiner is aluminum yttrium alloy, aluminum titanium carbon alloy and aluminum bait alloy according to the mass ratio of 2:1:2 to 3, namely, the mass percent of yttrium in the aluminum yttrium alloy is 10 percent, the mass percent of titanium in the aluminum titanium carbon alloy is 5 percent, the mass percent of carbon is 0.2 percent, and the mass percent of bait in the aluminum bait alloy is 10 percent.
4. An aluminum alloy die casting according to claim 1, wherein the refining agent is a mixture containing 10 to 20 mass% NaNO 3 10 to 20 percent of nano graphite powder and 10 to 20 percent of Na 2 SiF 6 AlF of the remaining mass 6 。
5. The aluminum alloy die casting according to claim 1, wherein in the step (1), after the nitrogen is exhausted, nitrogen is continuously introduced into the smelting furnace, the smelting furnace is kept in a nitrogen atmosphere, and the intermittent stirring is carried out for 5-20 circles every 2 min.
6. An aluminum alloy die casting as claimed in claim 1, wherein: in the step (2) of refining, intermittent salvaging and deslagging are carried out in the refining process, and salvaging and deslagging are carried out once every 1 h.
7. An aluminum alloy die casting as claimed in claim 1, wherein: in the semi-solid die casting in the step (4), vacuumizing to ensure that the vacuum degree is less than or equal to 80mbar, performing hot die casting molding, wherein the temperature is 400-600 ℃, the pressure is 80-90 Mpa, and the pressure is maintained for 2-3 min after pressurization.
8. An aluminum alloy die casting as claimed in claim 1, wherein: the step (5) of anodic oxidation treatment, before the anodic oxidation treatment, polishing and polishing the aluminum alloy rough blank; the electrolyte is one of oxalic acid, chromic acid and sulfuric acid, and the concentration of the electrolyte is 120-200 g/L; the voltage of the direct current is 15-30V, and the current density is 0.5-3A; the hole sealing agent is nickel hole sealing agent solution, wherein the concentration of Ni ions is 0.8-1.2 g/L, F ion concentration is 0.35-0.6 g/L, the rest is deionized water, and the PH value is 5.6-6.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310750862.5A CN116770110A (en) | 2023-06-25 | 2023-06-25 | Aluminum alloy die casting and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310750862.5A CN116770110A (en) | 2023-06-25 | 2023-06-25 | Aluminum alloy die casting and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116770110A true CN116770110A (en) | 2023-09-19 |
Family
ID=88011180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310750862.5A Pending CN116770110A (en) | 2023-06-25 | 2023-06-25 | Aluminum alloy die casting and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116770110A (en) |
-
2023
- 2023-06-25 CN CN202310750862.5A patent/CN116770110A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106566935B (en) | A kind of liquid forging aluminium alloy and preparation method thereof | |
| CN102051562A (en) | Process for homogenizing aluminum alloy | |
| CN111690844B (en) | Eutectic Al-Fe-Mn-Si-Mg die casting alloy and preparation method and application thereof | |
| CN113403510B (en) | High-strength and high-toughness cast aluminum-silicon alloy and preparation method thereof | |
| CN114231799B (en) | Non-heat-treatment high-toughness die-casting aluminum-silicon alloy and preparation method thereof | |
| WO2021185209A1 (en) | High-strength, high-corrosion resistance ternary magnesium alloy and preparation method therefor | |
| CN115558825B (en) | High-heat-conductivity high-strength and high-toughness die-casting aluminum alloy and preparation method thereof | |
| CN113862523A (en) | Al-Mn series die-casting alloy and preparation method and application thereof | |
| CN106906491A (en) | A kind of ferronickel base is anti-oxidant and corrosion resisting alloy inert anode material | |
| CN113355584A (en) | High-cobalt high-molybdenum superhard high-speed steel and method for improving hot working performance thereof | |
| CN108977711A (en) | A kind of diecast magnesium alloy material and preparation method thereof | |
| CN116770110A (en) | Aluminum alloy die casting and preparation method thereof | |
| CN109136672B (en) | Corrosion-resistant high-strength aluminum alloy and preparation method thereof | |
| CN114717453B (en) | High-toughness cast aluminum-silicon alloy and preparation method thereof | |
| CN114107757B (en) | Cast aluminum alloy for automobile metal casting and processing technology thereof | |
| CN113403514B (en) | High-strength cast aluminum alloy and preparation method thereof | |
| CN109868396A (en) | A kind of fused salt material and its preparation method and application | |
| CN115786784A (en) | High-strength and high-toughness cast aluminum-silicon-copper-magnesium alloy, and preparation method and application thereof | |
| CN115418535A (en) | Aluminum alloy material, preparation method and application thereof, and aluminum alloy product | |
| CN114892031A (en) | Production process of high-strength and high-toughness lightweight structural part die-casting aluminum alloy | |
| CN112760536B (en) | Negative electrode material magnesium alloy and preparation method thereof | |
| CN110423924B (en) | Forging and heat treatment process of free forging | |
| CN111996419A (en) | Iron-containing hypoeutectic aluminum-silicon alloy and preparation method thereof | |
| CN113584351B (en) | Rare earth-free aluminum alloy and preparation method and application thereof | |
| CN115896514B (en) | Preparation method of aluminum alloy casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |