A deformed aluminum alloy containing double rare earth elements, and its products and preparation method

Abstract

The present invention discloses a deformed aluminum alloy containing dual rare earth elements, wherein the dual rare earth elements in the raw materials of the deformed aluminum alloy are Ce and Er, and the Ce and Er in the raw materials of the deformed aluminum alloy are calculated as Ce: 0.05-0.2wt% and Er: 0.02-0.2wt% in weight percentage. The present invention also discloses a preparation method of the deformed aluminum alloy, and also discloses a deformed aluminum alloy product made of the above-mentioned material and a preparation method thereof. The deformed aluminum alloy and its product of the present invention can refine the grain of the deformed aluminum alloy material of the present invention, have good flow properties, and also have significantly improved mechanical properties such as yield strength, tensile strength, and elongation, while also achieving a good anodizing effect. The preparation method of the present invention is simple and convenient for industrial application.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloy materials, and in particular to a deformed aluminum alloy containing double rare earth elements, a deformed aluminum alloy product and a preparation method thereof. Background Art

[0002] Aluminum alloys are widely used in aerospace, aviation, transportation, construction, electromechanical, light industry, and daily necessities due to their low density and excellent mechanical properties. As people's demands for the appearance of products (such as 3C electronic products) become higher, traditional 6-series aluminum alloys with good anodizing effects have gained more applications. However, due to the poor fluidity of traditional 6-series aluminum alloys, shrinkage and cracking may occur during the squeeze casting process due to factors such as high contraction forces. The yield strength of the products is also low, which limits their production and application.

[0003] In order to solve this problem, it has been found through research that fluidity can be improved mainly by refining the crystal grain size of aluminum alloy materials. In existing research, people usually use modifiers to improve the crystal grain size of aluminum alloy materials. In recent years, with the deepening of people's research on rare earth elements, rare earth elements have been widely used as modifiers in aluminum alloy materials. The application of rare earth elements in aluminum alloys adopted in the prior art has improved the fluidity of alloy products to a certain extent, but it is still insufficient when facing higher performance occasions such as fluidity and yield strength. Therefore, there is an urgent need for an aluminum alloy material that can further improve the mechanical properties such as the fluidity and yield strength of aluminum alloys and simultaneously have a higher anodizing effect. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a deformed aluminum alloy having the advantages of high yield strength and good anodizing performance. The deformed aluminum alloy contains double rare earth elements. The present invention also provides a method for preparing the deformed aluminum alloy, and also provides a deformed aluminum alloy product and a method for preparing the product.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A deformed aluminum alloy containing double rare earth elements, wherein the double rare earth elements in the raw materials of the deformed aluminum alloy are Ce and Er, and the weight percentages of Ce and Er in the raw materials of the deformed aluminum alloy are Ce: 0.05-0.2wt% and Er: 0.02-0.2wt%.

[0007] In the present invention, a further preferred scheme is that the raw material of the deformed aluminum alloy also includes the following components in weight percentage: Si: 1.5-3wt%, Fe≤0.2wt%, Cu: 0.4-0.8wt%, Mn: 0.15-0.3wt%, Mg: 0.8-1.2wt%, Cr≤0.1wt%, Zn≤0.2wt%, Ti: 0.015-0.03wt%, Na≤0.0001wt%, Be: 0.001-0.005wt%, and the balance is Al.

[0008] In the present invention, a further preferred solution is that the Ce content in the raw material of the wrought aluminum alloy is 0.1 wt % by weight.

[0009] In the present invention, a further preferred solution is that in the raw material of the wrought aluminum alloy, the sum of the weight percentages of Ce and Er is 0.15wt%, and the weight percentage ratio of Ce to Er is 2:1.

[0010] In the present invention, a further preferred scheme is that the deformed aluminum alloy raw material includes the following components in weight percentage: Si: 2wt%, Fe≤0.2wt%, Cu: 0.5wt%, Mn: 0.18wt%, Mg: 0.1wt%, Ce: 0.1wt%, Er: 0.05wt%, Cr≤0.1wt%, Zn≤0.2wt%, Ti: 0.02wt%, Na≤0.0001wt%, Be: 0.004wt%, and the balance is Al.

[0011] The preparation method of the aluminum alloy of the present invention comprises the following steps: heating industrial Si, pure Al, master alloy Al-40% Cu, master alloy Al-40% Ce, and master alloy Al-10% Er to 710-730° C. to melt, then adding Mg, refining and degassing for 15-20 minutes, adding master alloy Al-5Ti-B during the degassing process; then standing for 12-15 minutes to reduce the melt temperature to 670-690° C.; and cooling to obtain the alloy.

[0012] The present invention also claims protection for a deformed aluminum alloy product, wherein the material of the deformed aluminum alloy product is the deformed aluminum alloy described in any one of the above solutions.

[0013] In the present invention, a further preferred solution is that the aluminum alloy product is one of a 3C product frame, a 3C product middle frame, and a 3C product back panel.

[0014] The method for preparing a deformed aluminum alloy product of the present invention comprises the following steps: heating industrial Si, pure Al, a master alloy Al-40% Cu, a master alloy Al-40% Ce, and a master alloy Al-10% Er to 710-730° C. to melt, then adding Mg, refining, and degassing for 15-20 minutes, adding a master alloy Al-5Ti-B during the degassing process; then allowing the melt to stand for 12-15 minutes to lower the temperature to 670-690° C.; using the Giss method to prepare a semi-solid aluminum alloy slurry from the liquid aluminum alloy, and then using an extrusion casting process to produce the deformed aluminum alloy product.

[0015] In the present invention, a further preferred scheme is that in the extrusion casting process: the speed of the semi-solid aluminum alloy slurry in the barrel is V1, the speed of pressing the semi-solid aluminum alloy slurry into the mold from the gate is V2, the mold temperature is 200-230°C, the holding pressure is 150-200MPa, and the holding time is 5-20s, wherein V1:V2=1:3.4, V1=100-200mm / s.

[0016] In the present invention, a further preferred solution is that in the extrusion casting process: in the extrusion casting process: V1 is 100 mm / s, V2 is 340 mm / s, the mold temperature is 218-220°C, the holding pressure is 200 MPa, and the holding time is 10 s.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the deformed aluminum alloy of the present invention, by adding a combination of double rare earth elements, can refine the grains of the deformed aluminum alloy material of the present invention, have good flow properties, and its physical properties such as yield strength, tensile strength and elongation are also greatly improved, while a good anodizing effect can be obtained; and the preparation method of the present invention is simple and convenient for industrial application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Metallographic microscope images of the deformed aluminum alloys of Comparative Example 1-2, Comparative Example 2-4, and Example 2-2 of Example 1;

[0019] Figure 2 The following are photos of the deformed aluminum alloy product prepared in Example 8 (corresponding to Example 8-1 and Example 8-2) and its anodized product;

[0020] in, Figure 1 a corresponds to a ratio of 1-2, Figure 1 b corresponds to Example 2-2, Figure 1 c corresponds to scales 2–4, the scale of each figure is 100 μm:1 cm; Figure 2 A in the formula refers to the deformed aluminum alloy product of Example 8-1. Figure 2B in the figure refers to the deformed aluminum alloy product of Example 8-2. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments and the accompanying drawings. It should be noted that, provided that no conflicts exist, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in these embodiments are commercially available. The specific embodiments are illustrative and are intended only to explain this application, and should not be construed as limiting the scope of protection of this application.

[0022] A deformed aluminum alloy containing double rare earth elements, wherein the double rare earth elements in the raw materials of the deformed aluminum alloy are Ce and Er, and the weight percentages of Ce and Er in the raw materials of the deformed aluminum alloy are Ce: 0.05-0.2wt% and Er: 0.02-0.2wt%.

[0023] In the deformed aluminum alloy of the present invention, the added rare earth elements Ce and Er are easily enriched at the solid / liquid interface, thereby redistributing solute elements during crystallization nucleation, reducing the solidification temperature, increasing the composition supercooling, hindering the continuous growth of α-Al grains, and refining the grains. In addition, the rare earth elements are easily adsorbed near the grain boundaries and subgrain boundaries during crystallization, reducing the surface energy of grain growth, increasing the nucleation rate during solidification, and can also form Al3Ce and Al3Er compounds, which can serve as effective nucleation substrates, helping to increase the nucleation rate and refine the grains. In addition, the rare earth elements also have the effect of purifying the grain boundaries, and the impurity phases and defective structures in the dendrites are gradually reduced. In this way, the deformed aluminum alloy material of the present invention can be refined in grains, has good flow properties, and its physical properties such as yield strength, tensile strength and elongation are also well improved, while also achieving a good anodizing effect.

[0024] For the deformed aluminum alloy of the present invention, in some embodiments, on the basis of the double rare earth elements Ce and Er, the raw materials of the deformed aluminum alloy also include the following components in weight percentage: Si: 1.5-3wt%, Fe≤0.2wt%, Cu: 0.4-0.8wt%, Mn: 0.15-0.3wt%, Mg: 0.8-1.2wt%, Cr≤0.1wt%, Zn≤0.2wt%, Ti: 0.015-0.03wt%, Na≤0.0001wt%, Be: 0.001-0.005wt%, and the balance is Al.

[0025] In order to further refine the grains and improve physical properties such as yield strength, tensile strength and elongation, the dosage of the dual rare earth elements can be set as follows: the weight percentage of Ce is 0.1-0.15wt%, and the weight percentage of Er is 0.02-0.15wt%.

[0026] The inventors have discovered that a wrought aluminum alloy containing 0.1% Ce by weight and Er by weight, when combined with Er, exhibits finer grains and improved physical properties such as yield strength, tensile strength, and elongation compared to alloys containing other amounts of Ce. To further refine the grains and enhance physical properties such as yield strength, tensile strength, and elongation, the amounts of the dual rare earth elements can be adjusted such that the combined weight percentages of Ce and Er in the raw material for the wrought aluminum alloy are 0.15% by weight, and the weight percentage ratio of Ce to Er is 2:1.

[0027] In the present invention, in order to obtain a deformed aluminum alloy with better grain size and better physical properties, its raw materials include the following components in weight percentage: Si: 2wt%, Fe≤0.2wt%, Cu: 0.5wt%, Mn: 0.18wt%, Mg: 0.1wt%, Ce: 0.1wt%, Er: 0.05wt%, Cr≤0.1wt%, Zn≤0.2wt%, Ti: 0.02wt%, Na≤0.0001wt%, Be: 0.004wt%, and the balance is Al.

[0028] The deformed aluminum alloy of the present invention has a preparation method comprising the following steps: heating industrial Si, pure Al, a master alloy Al-40% Cu, a master alloy Al-40% Ce, and a master alloy Al-10% Er to 710-730°C to melt, subsequently adding Mg, refining, and degassing for 15-20 minutes, adding the master alloy Al-5Ti-B during the degassing process; then standing for 12-15 minutes to reduce the melt temperature to 670-690°C; and cooling to obtain the alloy.

[0029] The present invention also claims protection for a deformed aluminum alloy product, wherein the material of the deformed aluminum alloy product is the deformed aluminum alloy described in any of the above-mentioned embodiments. The deformed aluminum alloy product of the present invention can be exemplified by, but is not limited to, a 3C product frame (such as a mobile phone frame or a PAD frame), a 3C product midframe (such as a mobile phone midframe or a PAD midframe), or a 3C product backplane (such as a mobile phone backplane or a PAD backplane).

[0030] The method for preparing a deformed aluminum alloy product of the present invention comprises the following steps: heating industrial Si, pure Al, a master alloy Al-40% Cu, a master alloy Al-40% Ce, and a master alloy Al-10% Er to 710-730° C. to melt, then adding Mg, refining, and degassing for 15-20 minutes, adding a master alloy Al-5Ti-B during the degassing process; then allowing the melt to stand for 12-15 minutes to lower the temperature to 670-690° C.; using the Giss method to prepare a semi-solid aluminum alloy slurry from the liquid aluminum alloy, and then using an extrusion casting process to produce the deformed aluminum alloy product.

[0031] For the squeeze casting process, the following settings can be made: the speed of the semi-solid aluminum alloy slurry in the barrel is V1, the speed of injecting the semi-solid aluminum alloy slurry from the gate into the mold is V2, the mold temperature is 200-230℃, the holding pressure is 150-200MPa, and the holding time is 5-20s, where V1:V2=1:3.4, V1=100-200mm / s.

[0032] Regarding the pouring temperature of the alloy liquid, when the pouring temperature is greater than 730°C, the fluidity of the aluminum alloy liquid increases, which is beneficial to filling the mold, but it is easy to increase the amount of gas inhaled, resulting in defects such as pores caused by air entanglement, and too high a temperature can easily lead to a reduction in the life of the mold; when the pouring temperature is less than 670°C, the fluidity of the aluminum alloy liquid will decrease, which is not conducive to filling the mold and is prone to thermal cracking defects. In addition, the alloy liquid is also prone to form a hard shell layer in the barrel, which hinders the pressure of the punch on the alloy liquid, resulting in uneven heat transfer and defects; selecting the pouring temperature of the alloy liquid to be 670-730°C can reduce product quality defects such as air entanglement and thermal cracking, and can also increase the service life of the mold; in some other embodiments, the pouring temperature can also be selected to be 670-690°C.

[0033] The temperature of the mold during extrusion casting also has a certain impact on product quality. When the mold temperature is less than 200°C, the alloy liquid will quickly undergo heat exchange when it encounters the mold wall during filling, resulting in insufficient filling near the mold wall and prone to cracks. When the mold temperature is greater than 300°C, the cooling time of the alloy liquid will become longer, resulting in quality defects such as bubbles. In addition, excessively high mold temperature can easily cause adhesion between the mold and the casting, reducing the service life of the mold. Selecting the mold temperature in the indirect extrusion casting process to be 200-300°C can reduce product quality defects such as cracks and bubbles, and can also increase the service life of the mold. In the present invention, the more suitable mold temperature is 218-220°C.

[0034] The selection of parameters such as "the speed at which the aluminum alloy liquid is pushed from the barrel into the gate," "the speed at which the aluminum alloy liquid is injected from the gate into the mold," "the holding pressure," and "the holding time" can be determined based on the specific formulation of the aluminum alloy material, product quality, and other requirements. The inventors' research has shown that in the preparation of deformed aluminum alloys according to the present invention, the speed of the semi-solid aluminum alloy slurry in the barrel is V1, the speed at which the semi-solid aluminum alloy slurry is injected from the gate into the mold is V2, the mold temperature is 200-230°C, the holding pressure is 150-200 MPa, and the holding time is 5-20 seconds. V1:V2 = 1:3.4, and V1 = 100-200 mm / s. This effectively addresses issues such as thermal cracking and air entrainment, and prevents product production defects.

[0035] A more preferred solution for the extrusion casting process is: in the extrusion casting process: V1 is 100 mm / s, V2 is 340 mm / s, the mold temperature is 218-220°C, the holding pressure is 200 MPa, and the holding time is 10 s.

[0036] Comparative Example 1-Comparative Example 2 (Deformed Aluminum Alloys Containing a Single Rare Earth Element)

[0037] A deformed aluminum alloy containing a single rare earth element, comprising the following components in weight percentage: Si: 2 wt%, Fe≤0.2 wt%, Cu: 0.5 wt%, Mn: 0.18 wt%, Mg: 0.1 wt%, Cr≤0.1 wt%, Zn≤0.2 wt%, Ti: 0.02 wt%, Na≤0.0001 wt%, Be: 0.004 wt%, Ce or Er is added according to the amount in Table 1, and the balance is Al; comparative example 1 (comparative examples 1-1 to 1-6) and comparative example 2 (comparative examples 2-1 to 2-6) are constructed;

[0038] The deformed aluminum alloy is prepared by heating industrial Si, pure Al, a master alloy Al-40% Cu, a master alloy Al-40% Ce, or a master alloy Al-10% Er to 720° C. to melt, then adding Mg, refining, and degassing for 15-20 minutes, adding a master alloy Al-5Ti-B during the degassing process; then standing for 12-15 minutes to reduce the melt temperature to 680° C.; and cooling to obtain a deformed aluminum alloy ingot.

[0039] The grain size of the deformed aluminum alloy was tested and counted using a metallographic microscope of a commercially available company, and the average grain size was calculated. Three tensile tests (yield strength, tensile strength, and elongation) were performed on the deformed aluminum alloy using a WDS-100KE tensile testing machine of a commercially available company. Specific data are shown in the following tables (wherein the unit of grain size is μm; the unit of tensile strength and yield strength is MPa; the unit of elongation is %):

[0040] Table 1: Comparative Example 1, Comparative Example 2 formula and performance test data

[0041]

[0042]

[0043] It can be seen from the data in the above table that adding rare earth elements Ce or Er to aluminum alloys will refine the grain size. When either is added alone, the grain size first decreases and then increases with the increase in the addition amount. It can be seen from the data in the above table that when the Ce addition amount is 0.13wt%, the average grain size of the aluminum alloy is the smallest (151μm), and the corresponding tensile strength, yield strength and elongation properties are also the best; when the Er addition amount is 0.1wt%, the average grain size of the aluminum alloy is the smallest (145μm), and the corresponding tensile strength, yield strength and elongation properties are also the best.

[0044] Example 1-Example 5 (Deformed Aluminum Alloy Containing Double Rare Earth Elements)

[0045] After discussing the effects of single rare earth elements Ce or Er on the grain size, yield strength and other properties of deformed aluminum alloys in comparative examples, let’s look at the effects of adding both rare earth elements Ce and Er to the deformed aluminum alloys to test their effects on the grain size, yield strength and other properties of the aluminum alloys.

[0046] A deformed aluminum alloy containing double rare earth elements, the deformed aluminum alloy comprising the following components in weight percentage: Si: 2 wt%, Fe≤0.2 wt%, Cu: 0.5 wt%, Mn: 0.18 wt%, Mg: 0.1 wt%, Cr≤0.1 wt%, Zn≤0.2 wt%, Ti: 0.02 wt%, Na≤0.0001 wt%, Be: 0.004 wt%, Ce and Er are added in the amounts shown in Table 2 or Table 3, and the balance is Al;

[0047] The deformed aluminum alloy is prepared by the following method: industrial Si, pure Al, master alloy Al-40% Cu, master alloy Al-40% Ce, and master alloy Al-10% Er are heated to 720° C. to melt, then Mg is added, and the mixture is refined and degassed for 15-20 minutes. During the degassing process, the master alloy Al-5Ti-B is added; the mixture is allowed to stand for 12-15 minutes, and the temperature of the melt is lowered to 680° C.; and the mixture is cooled to obtain a deformed aluminum alloy ingot.

[0048] The grain size of the deformed aluminum alloy was measured and counted using a metallographic microscope of a commercially available company, and the average grain size was calculated. Three tensile tests (yield strength, tensile strength, and elongation) were performed on the deformed aluminum alloy using a WDS-100KE tensile testing machine of a commercially available company. Specific data are shown in the following tables (wherein the unit of grain size is μm; the unit of tensile strength and yield strength is MPa; the unit of elongation is %).

[0049] Based on the above formula (the amounts of Ce and Er are shown in Table 2) and process, deformed aluminum alloy materials of Examples 1 to 5 (wherein, Example 1 includes “Example 1-1” to “Example 1-6”, Example 2 includes “Example 2-1” to “Example 2-6”, Example 3 includes “Example 3-1” to “Example 3-6”, Example 4 includes “Example 4-1” to “Example 4-6”, and Example 5 includes “Example 5-1” to “Example 5-6”) were prepared, and their grain size, tensile strength, yield strength, and elongation were tested, as shown in Table 2:

[0050] Table 2: Examples 1 to 5 formulations and performance test data

[0051]

[0052]

[0053] It can be seen from the data in the above table and the data in Table 1 that the deformed aluminum alloys of each embodiment of Examples 1 to 5 (all with the addition of dual rare earth elements Ce and Er) are more effective in refining grains and improving the mechanical properties of aluminum alloys than single rare earth elements; when the amount of Ce is 0.1wt%, when combined with Er, the overall effect of refining grain size is even better.

[0054] Further research was conducted on the basis of "Example 2-1" to "Example 2-6", and "Example 2-7" to "Example 2-12" were constructed by combining the amounts of Ce and Er. The grain size, tensile strength, yield strength and elongation were tested, as shown in Table 3.

[0055] Table 3: Formulation and performance test data of Examples 2-7 to 2-11

[0056]

[0057] Combining the data in Tables 1 to 3, when the Ce content is fixed at 0.1 wt% and the Er dosage is 0.05 wt% (corresponding to Example 2-2), the grain size is the smallest, and the corresponding tensile strength, yield strength and elongation effects are also better.

[0058] It can be seen from the data of the above embodiments and comparative examples that the dual rare earth combination application of the present invention can better refine the grain size of the aluminum alloy and improve the yield strength, tensile strength and elongation of the aluminum alloy compared to the application of a single rare earth element.

[0059] Example 6

[0060] Based on the deformed aluminum alloy formula in Example 1, combined with the relevant preparation process (i.e., the process remains unchanged), the amount of each component in the deformed aluminum alloy was adjusted to construct Example 6 (Examples 6-1 to 6-5, see Table 4 for specific formulas):

[0061] Table 4: Deformed aluminum alloy formulas for Examples 6-1 to 6-5

[0062]

[0063] The grain size, tensile strength, yield strength and elongation of each deformed aluminum alloy in Example 6 were tested using the same testing equipment as the above-mentioned embodiments and comparative examples (such as Example 1). Specific data are shown in Table 5:

[0064] Table 5: Deformed aluminum alloy performance test data table of Example 6

[0065] Example 6 Example 6-1 Example 6-2 Example 6-3 Example 6-4 Example 6-5 Grain size 128 105 128 124 119 tensile strength 371 392 372 375 379 Yield strength 324 340 328 330 335 Elongation 7.6 8.4 7.8 7.8 8.0

[0066] From Tables 1 to 5, it can be seen that the dual rare earth combination application of the present invention can better refine the grain size of the aluminum alloy and improve the yield strength, tensile strength and elongation of the aluminum alloy compared to the application of a single rare earth element.

[0067] Example 7

[0068] A deformed aluminum alloy product, based on the formula of Example 2-2, comprises the following steps: heating industrial Si, pure Al, a master alloy Al-40% Cu, a master alloy Al-40% Ce, and a master alloy Al-10% Er to 720°C to melt, then adding Mg, refining, and degassing for 15-20 minutes, adding a master alloy Al-5Ti-B during the degassing process; then standing for 12-15 minutes to reduce the melt temperature to 680°C; using the Giss method to form a semi-solid aluminum alloy slurry from the liquid aluminum alloy, and then using an extrusion casting process to produce the deformed aluminum alloy product.

[0069] In the squeeze casting process, the squeeze casting equipment is a liquid die segment machine from a certain company on the market; the speed of the semi-solid aluminum alloy slurry in the barrel is V1, the speed of the semi-solid aluminum alloy slurry being injected into the mold from the gate is V2, the mold temperature is 218-220°C, the holding pressure is 200 MPa, and the holding time is 10 seconds, wherein V1:V2 = 1:3.4, V1 = 100 mm / s, V2 = 340 mm / s; and the mold release agent is a mold release agent from a certain brand on the market;

[0070] The deformed aluminum alloy product can be a mobile phone frame or a mobile phone back panel.

[0071] Example 8 (including "Example 8-1" and "Example 8-2")

[0072] A deformed aluminum alloy product (Example 8-1, corresponding to Figure 2 The product indicated by A in the figure) has the same formula and preparation process as Example 7 (based on the formula of Example 2-2), except that the deformed aluminum alloy product is a cover body (6 covers in 1 mold), and the prepared cover body is chemically polished (polishing conditions: commercially available XF-611 aluminum chemical polishing agent, polishing at a temperature of 100°C for 1 min), then washed with deionized water, and anodized after drying (the anodizing process is: anodizing sulfuric acid concentration of 180g / L, voltage 16V, oxidation treatment for 40min, water washing, followed by dyeing at room temperature for 3min, water washing, sealing with S30 at 85°C for 20min, followed by water washing and drying), and the product is obtained.

[0073] Prepare another deformed aluminum alloy product (Example 8-2, corresponding to Figure 2 The product indicated by B in the figure) is different from Example 8-1 in that the aluminum alloy raw material formula adopts Example 1-1, and the rest of the preparation process, polishing and anodizing are the same as Example 8-1.

[0074] from Figure 2 It can be seen that the deformed aluminum alloy product of the present invention has a better anodizing effect; among them, the deformed aluminum alloy product prepared by the formula of Example 2-2 has a better anodizing coloring effect than the deformed aluminum alloy products prepared by other formulas.

[0075] Finally, it should be noted that the above-mentioned implementation mode is only a preferred embodiment of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A deformed aluminum alloy product, characterized in that: The material of the deformed aluminum alloy product is a deformed aluminum alloy whose raw materials are the following raw materials in weight percentage: Si: 2wt%, Fe≤0.2wt%, Cu: 0.5wt%, Mn: 0.18wt%, Mg: 0.1wt%, Ce: 0.1wt%, Er: 0.05wt%, Cr≤0.1wt%, Zn≤0.2wt%, Ti: 0.02wt%, Na≤0.0001wt%, Be: 0.004wt%, and the balance is Al; The deformed aluminum alloy product is prepared by heating industrial Si, pure Al, a master alloy Al-40% Cu, a master alloy Al-40% Ce, and a master alloy Al-10% Er to 710-730° C. to melt, then adding Mg, refining, and degassing for 15-20 minutes, adding a master alloy Al-5Ti-B during the degassing process; then allowing the melt to stand for 12-15 minutes to lower the temperature to 670-690° C.; using the Giss method to form a semi-solid aluminum alloy slurry from the liquid aluminum alloy, and then using a squeeze casting process to produce the deformed aluminum alloy product. In the squeeze casting process, the speed of the semi-solid aluminum alloy slurry in the barrel is V1, and the speed of injecting the semi-solid aluminum alloy slurry from the gate into the mold is V2, V1 is 100 mm / s, V2 is 340 mm / s, the mold temperature is 218-220°C, the holding pressure is 200 MPa, and the holding time is 10 seconds. The deformed aluminum alloy product is a cover body. After extrusion casting, the obtained cover body is chemically polished. The chemical polishing conditions are: polishing with XF-611 aluminum chemical polishing agent at a temperature of 100°C for 1 minute, then washing with deionized water, blowing dry and then anodizing treatment. The anodizing treatment process is: anodizing sulfuric acid concentration of 180g / L, voltage of 16V, oxidation treatment for 40min, water washing, then dyeing at room temperature for 3min, water washing, sealing with S30 at 85°C for 20min, then water washing and drying.

Images