CN111101025A - Die-casting aluminum alloy, preparation method thereof and aluminum alloy forming body - Google Patents
Die-casting aluminum alloy, preparation method thereof and aluminum alloy forming body Download PDFInfo
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- CN111101025A CN111101025A CN201811247440.1A CN201811247440A CN111101025A CN 111101025 A CN111101025 A CN 111101025A CN 201811247440 A CN201811247440 A CN 201811247440A CN 111101025 A CN111101025 A CN 111101025A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
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- 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
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- 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
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Abstract
The invention discloses a die-casting aluminum alloy, a preparation method and an aluminum alloy forming body, wherein the die-casting aluminum alloy comprises the following components in percentage by weight: 0.5-1.5% of Mn, 0.1-1.0% of Zn, 0.1-0.5% of W, 0.01-0.1% of Mg, 0-0.05% of Ti, 0-0.01% of V, 0-0.05% of Si, 0-0.4% of Fe, and the balance of Al and inevitable impurity elements. The die-casting aluminum alloy provided by the invention has good die-casting forming performance and compact die-casting structure, is suitable for anodic oxidation treatment, has uniform appearance color, high glossiness and good coloring effect after anodic oxidation treatment, and is suitable for decorative products with high appearance requirements.
Description
Technical Field
The invention relates to the field of aluminum alloy, in particular to a die-casting aluminum alloy, a preparation method thereof and an aluminum alloy forming body.
Background
At present, the aluminum alloy anode oxidation product is widely applied, a layer of protective and decorative oxide film is formed on the outer part of the aluminum alloy after surface treatment, and the aluminum alloy anode oxidation product has metallic luster and great texture and is suitable for appearance parts of digital products, cosmetics and the like.
CNC is mostly adopted for processing aluminum alloy anode oxidation parts in the industry, and the defects are low material utilization rate and high processing cost. The die casting technology is mature in application of aluminum alloy part forming, and the technology is high in efficiency and material utilization rate and does not or rarely need subsequent machining. However, the conventional die-cast aluminum alloy such as ADC12 is often difficult to be anodized and has poor coloring properties.
Disclosure of Invention
The invention aims to overcome the technical problems that an aluminum alloy die casting is difficult to anodize and has poor coloring performance in the prior art, and provides a die-casting aluminum alloy which has good die-casting formability and is suitable for anodizing, a preparation method thereof and an aluminum alloy forming body.
In a first aspect, the present invention provides a die-cast aluminum alloy comprising, in weight percent:
0.5 to 1.5 percent of Mn,
0.1-1.0% of Zn,
0.1-0.5% of W,
0.01 to 0.1 percent of Mg,
0 to 0.05 percent of Ti,
0 to 0.01% of V,
0 to 0.05 percent of Si,
0 to 0.4 percent of Fe,
the balance of Al and inevitable impurity elements.
In a second aspect, the present invention provides a method for producing a die-cast aluminum alloy, comprising the steps of: smelting an aluminum alloy raw material and then carrying out die-casting treatment to obtain a die-cast aluminum alloy; the composition of the aluminum alloy raw material is such that the obtained die-cast aluminum alloy is the die-cast aluminum alloy according to the first aspect of the invention.
A third aspect of the present invention provides an aluminum alloy molded body comprising an aluminum alloy base body and an anodic oxide film layer attached to at least a part of a surface of the aluminum alloy base body, the aluminum alloy base body being the die-cast aluminum alloy as described above.
Through the technical scheme, the aluminum alloy which is good in die-casting forming performance, compact in die-casting structure and capable of being subjected to anodic oxidation surface treatment is provided, and the die-casting aluminum alloy is uniform in appearance color, high in glossiness and good in coloring effect after being subjected to anodic oxidation treatment and is suitable for decorative products with high appearance requirements.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, the present invention provides a die-cast aluminum alloy comprising, in weight percent:
0.5 to 1.5 percent of Mn,
0.1-1.0% of Zn,
0.1-0.5% of W,
0.01 to 0.1 percent of Mg,
0 to 0.05 percent of Ti,
0 to 0.01% of V,
0 to 0.05 percent of Si,
0 to 0.4 percent of Fe,
the balance of Al and inevitable impurity elements.
In the invention, in order to improve the mechanical property, the die-casting formability and the anodic oxidation property of the die-casting aluminum alloy, the die-casting aluminum alloy comprises the following components in percentage by weight:
0.8 to 1.3 percent of Mn,
0.3-0.8% of Zn,
0.25-0.5% of W,
0.05 to 0.1 percent of Mg,
0.01 to 0.05 percent of Ti,
0.002-0.01% of V,
0 to 0.03 percent of Si,
0.25-0.35% of Fe,
the balance of Al and inevitable impurity elements.
According to the invention, Mn element is added into the die-casting aluminum alloy, so that AlMn can be formed in a matrix6And the electrode potential of the phase is close to that of the matrix Al, so that the anodic oxidation performance of the alloy is ensured. When the Mn content is too low, the die-casting aluminum alloy has low strength and is not beneficial to the application of final products; when the Mn content is too high, an anodic oxide film is pink after the die-casting aluminum alloy is subjected to anodic oxidation treatment. In the die-cast aluminum alloy of the present invention, the total amount of the die-cast aluminum alloy is used as a reference, and the weight is usedThe Mn content is 0.5-1.5%, which not only can ensure the mechanical property and the anodic oxidation property of the die-casting aluminum alloy, but also can reduce the hot cracking tendency of the die-casting aluminum alloy and improve the die-casting forming property of the die-casting aluminum alloy. From the viewpoint of further improving the overall properties of the die-cast aluminum alloy, the content of Mn is preferably 0.8 to 1.3% by weight based on the total amount of the die-cast aluminum alloy.
According to the invention, the element W is added into the die-casting aluminum alloy, W has lower thermal expansion coefficient and high temperature resistance, and the element W is added into the die-casting aluminum alloy as an alloying element to improve the strength and the die-casting performance. In addition, the addition of the tungsten element can change the corrosion mode of the die-casting aluminum alloy and change point corrosion or local corrosion into uniform corrosion, so that the die-casting alloy can be uniformly formed into a film in the anodic oxidation process, and the generation of flow marks is reduced. However, when the W content is too low, the promotion effect on the corrosion resistance of the die-casting aluminum alloy is not obvious; when the W content is too high, the material cost increases. In the die-cast aluminum alloy of the present invention, the content of W is 0.1 to 0.5% by weight, more preferably 0.25 to 0.5% by weight, based on the total amount of the die-cast aluminum alloy.
According to the invention, alloy elements Zn and Mg are added into the die-casting aluminum alloy to form a Zn-Mg series strengthening phase, so that the strength of a die-casting product is ensured, the content of Zn is 0.1-1.0% and the content of Mg is 0.01-0.1% in percentage by weight based on the total amount of the die-casting aluminum alloy, and the addition of Zn and Mg within the content range does not influence the glossiness and transparency of an anodic oxide film of the die-casting aluminum alloy and does not influence the anodic oxidation surface effect of the die-casting aluminum alloy. However, when the contents of Zn and Mg are too low, the strength of the die-cast aluminum alloy is too low; when the Zn content is too high, the die casting is easy to crack; when the Mg content is too high, the elongation of the material decreases. According to the present invention, it is preferable that the content of Zn is 0.3 to 0.8% and the content of Mg is 0.05 to 0.1% in weight percentage based on the total amount of the die-cast aluminum alloy.
According to the invention, the die-casting aluminum alloy can also contain Ti and V, and the Ti and V can play a role in refining the grain structure and improving the comprehensive performance of the material in the aluminum alloy. Based on the total amount of the die-casting aluminum alloy, the content of Ti is 0-0.05 percent and the content of V is 0-0.01 percent in percentage by weight. According to the invention, preferably, the content of Ti is 0.01-0.05% and the content of V is 0.002-0.01%.
According to the invention, the die-casting aluminum alloy can also contain Si, and Si plays a role in improving the fluidity of the die-casting aluminum alloy, but Si causes difficulty in film formation during anodic oxidation, and the anodic oxidation effect is greatly damaged. In the die-casting aluminum alloy, the content of Si is 0-0.05 percent by weight percent based on the total weight of the die-casting aluminum alloy. In order to obtain better anodic oxidation effect, the content of Si is strictly controlled and the addition is minimized, and the content of Si is preferably 0-0.03%.
According to the invention, the die-casting aluminum alloy can also contain Fe, and when the content of Fe is too low, the aluminum alloy is easy to stick a die during die-casting; when the Fe content is too high, the anodic oxidation performance of the die-cast aluminum alloy is reduced, and an anodic oxide film becomes grey and dark. In the die-casting aluminum alloy, the total amount of the die-casting aluminum alloy is taken as a reference, and the content of Fe is 0-0.4 percent in percentage by weight; preferably, the total amount of the die-casting aluminum alloy is taken as a reference, the content of Fe is 0.25-0.35 percent by weight, the process problems of die sticking, hot cracking and the like in the die-casting process of the alloy can be further eliminated, and the mass production is improved.
The invention provides a die-casting aluminum alloy which is suitable for anodic oxidation and has good die-casting formability by reasonably regulating the contents of Mn, Zn, W, Mg, Ti, V, Si and Fe elements.
According to the invention, in the die-casting aluminum alloy, the total weight percentage of Mn, Zn and W in the die-casting aluminum alloy is 1.5-2.2%, and the weight ratio of Mg to Zn is 0.05-0.15: 1. In the invention, the weight content of each element is in the preferable range, so that the strength of the die-casting aluminum alloy is greatly improved, and the anodic oxidation performance is good.
According to the present invention, preferably, the weight ratio of Ti to V of the die-cast aluminum alloy is 4 to 6: 1. in the present invention, the weight ratio of Ti to V is in the above-mentioned preferable range, and the die-cast aluminum alloy obtained has a uniform and dense die-cast structure and a reduced defect rate such as pits and sand holes after anodic oxidation.
According to the invention, preferably the die-cast aluminium alloy has a hardness of 35-55HV, a yield strength of 45-70MPa and an elongation of > 15%.
In a second aspect, the present invention provides a method for producing a die-cast aluminum alloy, comprising the steps of: smelting an aluminum alloy raw material and then carrying out die-casting treatment to obtain a die-cast aluminum alloy; the composition of the aluminum alloy raw material is such that the obtained die-cast aluminum alloy is the die-cast aluminum alloy according to the first aspect of the invention.
According to the method for producing a die-cast aluminum alloy of the present invention, the aluminum alloy raw material may be a pure metal or a metal alloy as long as the composition of the aluminum alloy obtained by melting the added aluminum alloy raw material is within the above range. In a preferred case, the aluminum alloy raw material may include pure Al or Al alloy, pure Mn or Mn alloy, pure Zn or Zn alloy, pure W or W alloy, pure Mg or Mg alloy, pure Ti or Ti alloy, pure V or V alloy, pure Si or Si alloy, and pure Fe or Fe alloy. More preferably, the aluminum alloy starting material includes pure Al, Al-Mn alloy, Al-W alloy, Al-Ti-V alloy, Al-Si alloy, Al-Fe alloy, pure Mg, and pure Zn.
According to the preparation method of the die-cast aluminum alloy of the present invention, preferably, the smelting conditions are: the smelting temperature is 700 ℃ and 750 ℃, and the smelting time is 8-15 min.
According to the preparation method of the die-casting aluminum alloy, pure Al, Al-Mn intermediate alloy, Al-W intermediate alloy, Al-Ti-V intermediate alloy, Al-Si intermediate alloy, Al-Fe intermediate alloy, pure Mg and pure Zn are preferably weighed according to the amount. Putting pure Al, Al-Mn intermediate alloy, Al-W intermediate alloy, Al-Ti-V intermediate alloy, Al-Si intermediate alloy and Al-Fe intermediate alloy into a smelting furnace, heating to 700-750 ℃, adding pure Zn after the components are melted, adding pure Mg after Zn is completely dissolved, and stirring for 8-15 minutes after all alloy components are melted to ensure that the components are uniform to obtain the aluminum alloy melt. Removing dross and oxide skin on the surface of the aluminum alloy melt, spraying a covering agent for refining for 3-5 minutes, skimming, cooling to 690-710 ℃, and then casting the aluminum alloy solution into an aluminum alloy ingot; and after the aluminum alloy cast ingot is cooled, crushing the aluminum alloy cast ingot into blocks, and performing die-casting treatment to obtain the die-cast aluminum alloy.
According to the method for producing a die-cast aluminum alloy of the present invention, preferably, the conditions of the die-casting treatment are: the mold temperature is 250 ℃ to 300 ℃, the casting temperature is 690 ℃ to 730 ℃, and the die casting speed is 1.7-2.4 m/s.
A third aspect of the present invention provides an aluminum alloy molded body comprising an aluminum alloy base body and an anodic oxide film layer attached to at least a part of a surface of the aluminum alloy base body, the aluminum alloy base body being the die-cast aluminum alloy as described above.
According to the present invention, it is preferable that the thickness of the anodic oxide film layer of the aluminum alloy molded body is 10 to 20 μm.
The present invention will be further described with reference to the following specific examples.
Example 1
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 1, wherein the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1 | 0.8 | 0.3 | 0.07 | 0.05 | 0.01 | 0.02 | 0.33 | balance of |
Example 2
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 2, wherein the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1.2 | 0.6 | 0.35 | 0.06 | 0.035 | 0.007 | 0.02 | 0.3 | balance of |
Example 3
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 3, wherein the weight content of main elements is as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 0.5 | 1 | 0.35 | 0.06 | 0.05 | 0.01 | 0.06 | 0.3 | balance of |
Example 4
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 4, wherein the weight content of main elements is as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1 | 0.3 | 0.5 | 0.07 | 0.05 | 0.01 | 0.02 | 0.15 | balance of |
Example 5
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 5, wherein the weight content of main elements is as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1.5 | 0.2 | 0.15 | 0.1 | 0.035 | 0.007 | 0.05 | 0.2 | balance of |
Example 6
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 6, wherein the weight content of main elements is as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 0.7 | 0.1 | 0.1 | 0.06 | 0.02 | 0.001 | 0.01 | 0.35 | balance of |
Example 7
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 7, wherein the weight content of main elements is as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1.2 | 1 | 0.2 | 0.01 | 0.04 | 0.008 | 0.03 | 0.05 | balance of |
Example 8
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy sample 8, wherein the weight content of main elements is as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 0.8 | 0.9 | 0.25 | 0.06 | 0.04 | 0.008 | 0.01 | 0.1 | balance of |
Meanwhile, in order to more clearly illustrate the beneficial effects of the present invention, a comparative example was prepared, specifically as follows:
comparative example 1
Pure Al is used as a comparison sample 1, and the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 100 |
comparative example 2
Taking ADC12 as a comparison sample 2, after batching calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the provided aluminum alloy smelting ingot casting and die-casting sample preparation process to obtain the die-casting aluminum alloy comparison sample 2, wherein the weight contents of main elements are as follows:
| Cu | Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 2.0 | 0.5 | 1.0 | 0 | 0.3 | 0 | 0 | 12 | 0.9 | balance of |
Comparative example 3
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy comparison sample 3, wherein the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 3 | 0.15 | 0.4 | 0.06 | 0.05 | 0.01 | 0.05 | 0.25 | balance of |
Comparative example 4
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy comparison sample 4, wherein the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1.2 | 0.6 | 0.3 | 3 | 0.035 | 0.007 | 0.02 | 0.03 | balance of |
Comparative example 5
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy comparison sample 5, wherein the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1 | 0.3 | 0.5 | 0.07 | 0.05 | 0.01 | 0.05 | 2 | balance of |
Comparative example 6
After the material proportioning calculation, weighing each standard intermediate alloy and metal simple substance according to weight, and then preparing a sample according to the aluminum alloy smelting ingot casting and die casting sample preparation process to obtain a die casting aluminum alloy comparison sample 6, wherein the weight contents of main elements are as follows:
| Mn | Zn | W | Mg | Ti | V | Si | Fe | Al |
| 1 | 0.5 | 0.3 | 0.08 | 0.05 | 0.01 | 2 | 0.25 | balance of |
Mechanical Property test
Testing the tensile property of the die-casting aluminum alloy tensile sample strip according to the national standard GB/T228.1-2010;
testing the surface of a die-casting aluminum alloy sample piece according to the national standard GB/T4340.1-2009 for Vickers hardness;
| numbering | Yield strength/MPa | Elongation/percent | Vickers hardness HV |
| Example 1 | 68 | 18 | 54 |
| Example 2 | 66 | 21 | 53 |
| Example 3 | 53 | 17 | 45 |
| Example 4 | 57 | 16 | 47 |
| Example 5 | 59 | 24 | 48 |
| Example 6 | 46 | 27 | 35 |
| Example 7 | 48 | 25 | 37 |
| Example 8 | 50 | 22 | 40 |
| Comparative example 1 | 20 | 39 | 18 |
| Comparative example 2 | 155 | 2.5 | 112 |
| Comparative example 3 | 110 | 5.5 | 72 |
| Comparative example 4 | 105 | 5.5 | 75 |
| Comparative example 5 | 90 | 6.5 | 63 |
| Comparative example 6 | 85 | 6 | 60 |
Die casting performance test
The die-casting aluminum alloy sample piece and the die-casting aluminum alloy comparison sample piece both adopt the same die-casting technological parameters, and a sample is obtained in a vacuum die-casting mode;
the formability of the die-cast aluminum alloy is judged by the integrity of the product and whether cracks exist;
the flowability of the die-casting aluminum alloy is judged by adopting a mosquito-repellent incense die, scales are arranged on the die, and the larger the number of the die-casting sample is, the better the flowability is;
the compactness of the die-cast aluminum alloy is realized by preparing a metallographic sample, taking a metallographic picture, and counting the porosity of the structure, wherein the lower the porosity is, the more compact the structure is represented, and vice versa;
| numbering | Die-casting formability | Flowability in die casting | Porosity of the material |
| Example 1 | Complete (complete) | 1350 | 0.48% |
| Example 2 | Complete (complete) | 1380 | 0.51% |
| Example 3 | Complete (complete) | 1000 | 0.78% |
| Example 4 | Complete (complete) | 1250 | 0.54% |
| Example 5 | Complete (complete) | 1250 | 0.59% |
| Example 6 | Complete (complete) | 1150 | 0.85% |
| Example 7 | Complete (complete) | 1100 | 0.97% |
| Example 8 | Complete (complete) | 1250 | 0.63% |
| Comparative example 1 | Is not formed | 750 | 2.75% |
| Comparative example 2 | Complete (complete) | 1600 | 0.49% |
| Comparative example 3 | Cracking of | 1200 | 1.25% |
| Comparative example 4 | Complete (complete) | 1300 | 0.59% |
| Comparative example 5 | Complete (complete) | 1150 | 0.66% |
| Comparative example 6 | Complete (complete) | 1350 | 0.54% |
Anodic oxidation Performance test
After surface pretreatment such as grinding, polishing, sand blasting and the like is carried out on the die-cast aluminum alloy, sulfuric acid anodic oxidation is carried out by adopting the same technological parameters, and true color anodic oxidation and golden dyeing anodic oxidation are respectively carried out. Observing the natural color anode of the aluminum alloy molded body sample piece and the color of the dyed oxide film by naked eyes under natural light, and testing the thickness of the surface oxide film by adopting a film thickness tester;
| numbering | Appearance of anodic oxidation | Golden dyeing effect | Thickness of anode film |
| Example 1 | Silvery white, uniform and bright color | Golden color | 17μm |
| Example 2 | Silvery white, uniform and bright color | Golden color | 16μm |
| Example 3 | Silvery white, uniform and bright color | Golden color | 15μm |
| Example 4 | Silvery white, uniform and bright color | Golden color | 14μm |
| Example 5 | Silvery white, uniform and bright color | Golden color | 15μm |
| Example 6 | Silvery white, uniform and bright color | Golden color | 12μm |
| Example 7 | Silvery white, uniform and bright color | Golden color | 14μm |
| Example 8 | Silvery white, uniform and bright color | Golden color | 13μm |
| Comparative example 1 | Silvery white, uniform and bright color | Golden color | 18μm |
| Comparative example 2 | Black, uneven, dull, faded | Black color | Uneven film thickness |
| Comparative example 3 | Pale pink, uniform color and luster and poor glossiness | Light golden color | 14μm |
| Comparative example 4 | Silver gray, flow marks, poor gloss | Gold gray | 9μm |
| Comparative example 5 | Dark gray, flow marks, dull | Grey colour | 7μm |
| Comparative example 6 | Dark gray, uneven color, flow marks, dull | Grey colour | 6μm |
According to the embodiment, the comparative example and the test result, the die-casting aluminum alloy prepared by the technical scheme provided by the invention has the advantages of good die-casting forming performance, compact die-casting structure and suitability for anodic oxidation treatment, and the die-casting aluminum alloy has uniform appearance color, high glossiness and good coloring effect after anodic oxidation treatment and is suitable for decorative products with high appearance requirements.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A die cast aluminum alloy, comprising, in weight percent:
0.5 to 1.5 percent of Mn,
0.1-1.0% of Zn,
0.1-0.5% of W,
0.01 to 0.1 percent of Mg,
0 to 0.05 percent of Ti,
0 to 0.01% of V,
0 to 0.05 percent of Si,
0 to 0.4 percent of Fe,
the balance of Al and inevitable impurity elements.
2. The die-cast aluminum alloy of claim 1, wherein the die-cast aluminum alloy comprises:
0.8 to 1.3 percent of Mn,
0.3-0.8% of Zn,
0.25-0.5% of W,
0.05 to 0.1 percent of Mg,
0.01 to 0.05 percent of Ti,
0.002-0.01% of V,
0 to 0.03 percent of Si,
0.25-0.35% of Fe,
the balance of Al and inevitable impurity elements.
3. The die-cast aluminum alloy of claim 1 or 2, wherein the die-cast aluminum alloy has a total weight percent of Mn, Zn, and W of 1.5-2.2%, and a weight ratio of Mg to Zn of (0.05-0.15): 1.
4. The die-cast aluminum alloy of claim 1 or 2, wherein the weight ratio of Ti to V in the die-cast aluminum alloy is (4-6): 1.
5. The die-cast aluminum alloy of claim 1, wherein the die-cast aluminum alloy has a hardness of 35-55HV, a yield strength of 45-70MPa, and an elongation > 15%.
6. A method for preparing a die-cast aluminum alloy, characterized by comprising the steps of: smelting an aluminum alloy raw material and then carrying out die-casting treatment to obtain a die-cast aluminum alloy; the aluminum alloy starting material has a composition such that the resulting die-cast aluminum alloy is the die-cast aluminum alloy according to any one of claims 1 to 5.
7. The method for producing a die-cast aluminum alloy according to claim 6, wherein the melting condition is: the smelting temperature is 700 ℃ and 750 ℃, and the smelting time is 8-15 min.
8. The method for producing a die-cast aluminum alloy according to claim 6, wherein the die-casting treatment is performed under the conditions of: the mold temperature is 250 ℃ to 300 ℃, the casting temperature is 690 ℃ to 730 ℃, and the die casting speed is 1.7-2.4 m/s.
9. An aluminum alloy molded body comprising an aluminum alloy base body and an anodic oxide film layer attached to at least a part of a surface of the aluminum alloy base body, characterized in that the aluminum alloy base body is the die-cast aluminum alloy according to any one of claims 1 to 5.
10. Aluminium alloy shaped body according to claim 9, wherein the thickness of the anodic oxide film layer is 10-20 um.
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| CN201811247440.1A Pending CN111101025A (en) | 2018-10-25 | 2018-10-25 | Die-casting aluminum alloy, preparation method thereof and aluminum alloy forming body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220316034A1 (en) * | 2019-09-03 | 2022-10-06 | Nippon Light Metal Company, Ltd. | Photoluminescent aluminum alloy and photoluminescent aluminum alloy die-cast material |
-
2018
- 2018-10-25 CN CN201811247440.1A patent/CN111101025A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 李念奎: "《铝合金材料及其热处理技术》", 30 April 2012, 北京：冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220316034A1 (en) * | 2019-09-03 | 2022-10-06 | Nippon Light Metal Company, Ltd. | Photoluminescent aluminum alloy and photoluminescent aluminum alloy die-cast material |
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