CN115807183B - Aluminum alloy with ceramic color sense anodic oxidation effect and processing technology thereof - Google Patents
Aluminum alloy with ceramic color sense anodic oxidation effect and processing technology thereof Download PDFInfo
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- CN115807183B CN115807183B CN202211595460.4A CN202211595460A CN115807183B CN 115807183 B CN115807183 B CN 115807183B CN 202211595460 A CN202211595460 A CN 202211595460A CN 115807183 B CN115807183 B CN 115807183B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 44
- 239000000919 ceramic Substances 0.000 title claims abstract description 18
- 230000000694 effects Effects 0.000 title claims abstract description 18
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 230000003647 oxidation Effects 0.000 title claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 230000032683 aging Effects 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses an aluminum alloy with ceramic color sense anodic oxidation effect and a processing technology thereof, wherein the aluminum alloy is prepared by mixing 0.5-0.9wt% of Si; 0.7-1.0wt% of Mg; cu 0.5-0.9wt%; mn 0.04-0.35wt%; cr 0.01-0.55wt%; zr 0.001-0.15wt%; fe 0.001-0.35wt%; 0.001-0.05wt% of Ti; and casting the balance of Al and unavoidable impurities to obtain an alloy ingot, and homogenizing, extrusion molding and aging to obtain the aluminum alloy. According to the invention, the glossiness of the anodized aluminum alloy is controlled to 300-330Gu by reasonably adjusting the components of the aluminum alloy and controlling the processing technology, so that the material has ceramic color feel after the anode is highlighted, and the application space of the material is greatly expanded.
Description
Technical Field
The invention relates to the field of aluminum alloy materials, in particular to an aluminum alloy with ceramic color sense anodic oxidation effect and a processing technology thereof.
Background
At present, aluminum alloy is mainly applied to manufacturing of a middle frame in a smart phone, and after the manufacturing is finished, a highlight anode or a sand blasting anode process is adopted for processing. The aluminum alloy treated by the highlight anodic treatment is mainly a high-strength aluminum alloy based on 6013, the material after the anode is usually provided with metallic luster, and basically all intelligent terminals are required to have metallic luster similar to stainless steel after the anode of the material on the requirement of the highlight aluminum alloy. This causes the phenomenon of homogenization of aluminum alloy mobile phones on the market. On the other hand, the high-end mobile phones of part of terminals adopt ceramics as the shell, so that the mobile phones are distinguished in differentiation, but the ceramics are not resistant to falling. Therefore, it is necessary to provide a novel aluminum alloy and a processing technology thereof, so that the material shows a ceramic-like effect after highlighting the anode, and has higher strength.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the aluminum alloy and the processing technology thereof, and the microstructure of the material is better controlled by adjusting the content of the alloy simple substance and controlling the processing technology, so that the processed aluminum alloy has ceramic color sense anodic oxidation effect so as to meet the market demand.
The aim of the invention is achieved by the following technical scheme:
the invention provides an aluminum alloy with ceramic color sense anodic oxidation effect, which comprises the following components in percentage by mass: si 0.5-0.9wt%; 0.7-1.0wt% of Mg; cu 0.5-0.9wt%; mn 0.04-0.35wt%; cr 0.01-0.55wt%; zr 0.001-0.15wt%; fe 0.001-0.35wt%; 0.001-0.05wt% of Ti; the balance of Al and unavoidable impurities.
Wherein the mass ratio of Mn to Cr in the aluminum alloy is 0.5-0.8.
The glossiness of the anodized aluminum alloy is 300-330Gu, and the anode effect of the ceramic is reflected behind the high-brightness anode of the material.
Secondly, the invention provides a processing technology of an aluminum alloy with ceramic color sense anodic oxidation effect, which comprises the following steps:
weighing raw materials according to the mass percentage of each element in the aluminum alloy, and smelting and casting to obtain an ingot; homogenizing the cast ingot, heating to 350-400 ℃ at room temperature, preserving heat for 4-15h, heating to 500-540 ℃ and preserving heat for 2-6h, and heating to 550-570 ℃ and preserving heat for 16-24h; extruding the homogenized material, wherein the temperature of an extruding rod is 460-500 ℃, the extruding speed is 8-12 m/min, and the outlet temperature of the extruding material is 500-530 ℃; aging the extruded material, and preserving the temperature for 5-180 minutes at 175-190 ℃.
Further, the specific process of homogenizing the cast ingot is as follows: the room temperature is heated to 350-400 ℃ at 50-150 ℃ per hour, then is kept for 4-15 hours, is heated to 500-540 ℃ at 50-100 ℃ per hour, is kept for 2-6 hours, and is kept for 16-24 hours at 550-570 ℃ at 25-30 ℃ per hour.
Strengthening elements of Si and Mg elements in 6-series aluminum alloy, which form strengthening phase Mg 2 A precursor of Si; cu has the effect of promoting precipitation of the strengthening phase and can increase the solid solution strengthening effect of the material, so the content of Cu needs to be controlled as follows: si 0.5-0.9wt%, mg 0.7-1.0wt%, cu 0.5-0.9wt%, too much or too little affect the strengthening effect (strength performance) of the material.
Mn, cr, zr, ti acts primarily to control grain in the alloy. They form a dispersed phase in the matrix to hinder movement of grain boundaries and cause grain refinement. However, if the content is too much, the grains of the material are converted from equiaxed grains to fiber grains, so that the material has different colors or patterns after anode. Mn is thus 0.04 to 0.35 wt.%; cr 0.01-0.55wt%; zr 0.001-0.15wt%; ti 0.001-0.05wt%. On the other hand, cr and Mn elements form a large amount of dispersed second phase under the condition of proper proportion, so that the material has ceramic milky white color after highlighting anodic oxidation, and the proportion is Mn, cr=0.5-0.8.
The content of Fe is controlled to 0.001-0.35wt%, mainly because phases containing Cr, mn and Ti are required to be combined with Fe, and thus, when a certain amount of Fe is contained, the formation of these phases can be promoted.
After the cast rod is obtained, a homogenizing treatment method is needed to carry out subsequent deformation processing: heating to 350-400 deg.C, maintaining for 4-15 hr, heating to 500-540 deg.C, maintaining for 2-6 hr, and heating to 550-570 deg.C, and maintaining for 16-24 hr. The temperature is kept for 4 to 15 hours at 350 to 400 ℃ and is mainly used for promoting heterogeneous nucleation of Cr, ti, mn, fe-containing phases, and the temperature is kept for 2 to 6 hours at 500 to 540 ℃ and is used for promoting dissolution of Cu-containing phases; while preserving heat for 16-24 hours at 550-570 ℃ to promote Mg 2 Dissolution of the Si phase.
According to the invention, the glossiness of the anodized aluminum alloy is controlled to 300-330Gu by reasonably adjusting the components of the aluminum alloy and controlling the processing technology, so that the material has ceramic color feel after the anode is highlighted, and the application space of the material is greatly expanded.
Drawings
Figure 1 example 1 10000 x scanning electron microscope image.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention, and are not limiting of the claims of the invention.
Example 1
The aluminum alloy is prepared from the following raw materials in percentage by mass: si 0.71wt%; 0.92wt% of Mg; cu0.81wt%; mn 0.21wt%; 0.38wt% of Cr; 0.12wt% of Zr; 0.10wt% of Fe; 0.01wt% of Ti; smelting and casting the balance of Al and unavoidable impurities to obtain an ingot;
homogenizing after obtaining a casting rod, heating the room temperature to 350 ℃ at 150 ℃/h, preserving heat for 15h, heating the room temperature to 540 ℃ at 50 ℃/h, preserving heat for 2h, and heating the room temperature to 570 ℃ at 30 ℃/h, preserving heat for 16h.
The homogenized material was extruded at a rod temperature of 500℃and an extrusion speed of 12 m/min at an extrusion outlet temperature of 500 ℃.
The extrudate was aged and incubated at 190℃for 5 minutes.
Example 2
The aluminum alloy is prepared from the following raw materials in percentage by mass: si 0.65wt%; 0.89wt% of Mg; cu0.75wt%; mn 0.15wt%; 0.19wt% of Cr; 0.11wt% of Zr; 0.12wt% of Fe; 0.02wt% of Ti; smelting and casting the balance of Al and unavoidable impurities to obtain an ingot;
homogenizing after obtaining a casting rod, heating the room temperature to 400 ℃ at 50 ℃/h, preserving the heat for 4h, heating the room temperature to 500 ℃ at 100 ℃/h, preserving the heat for 6h, and heating the room temperature to 550 ℃ at 25 ℃/h, preserving the heat for 24h.
The homogenized material was extruded at a rod temperature of 460℃and an extrusion speed of 8 m/min at an extrusion outlet temperature of 530 ℃.
The extrudate was aged and incubated at 175℃for 180 minutes.
Example 3
The aluminum alloy composition is the same as in example 1, and the processing technology is as follows:
homogenizing after obtaining a casting rod, heating the room temperature to 375 ℃ at 100 ℃/h, preserving heat for 10h, heating to 520 ℃ at 80 ℃/h, preserving heat for 4h, heating to 560 ℃ at 30 ℃/h, preserving heat for 20h, and then extruding and aging.
The homogenized material was extruded at an extrusion rod temperature of 480℃and an extrusion speed of 10 m/min at an extrusion outlet temperature of 510 ℃.
The extruded material was aged and incubated at 180℃for 60 minutes.
Comparative example 1
The aluminum alloy composition was the same as in example 1, but using the following processing technique:
homogenizing the cast ingot, and heating the cast ingot to 560 ℃ at the room temperature of 100 ℃ per hour and preserving the heat for 24 hours.
Comparative example 2
The aluminum alloy component comprises 0.8wt% of Si; 0.9wt% of Mg; 1.2wt% of Cu; mn 0.45wt%; 0.78wt% of Cr; 0.25wt% of Zr; 0.45wt% of Fe; 0.5wt% of Ti; the balance of Al and unavoidable impurities.
The processing technique is the same as that of the embodiment 1;
the mechanical properties of the aluminum alloy profiles prepared in examples 1 to 3 and comparative examples 1 to 2 of the present invention were examined according to GB/T6892-2015 Standard of general Industrial aluminum and aluminum alloy extrusion Profile, and the examination results are shown in Table 1. Table 1 shows the properties of the alloys of examples 1-3 and comparative examples 1-2.
TABLE 1
As can be seen from the test data in Table 1, the metallic color is reflected after the aluminum alloy material highlights the anode with the gloss GU more than 330; when the gloss GU is less than 300, the aluminum alloy material highlights the anode and shows a grey and dark color feel; and only when the gloss GU is 300-330, the aluminum alloy material highlights the rear of the anode and shows the anode effect of the ceramic.
As can be seen from FIG. 1, the present invention adjusts the content of each element in the aluminum alloy and controls the processing technique, and the aluminum alloy material forms a large amount of particles which can make the material have a high brightness ceramic effect. As shown in Table 1, the invention improves the anodic oxidation effect of the material by reasonably adjusting the content of each element in the aluminum alloy and controlling the processing technology, and better meets the use requirement of differentiated competition of the appearance parts of consumer electronic products.
Those skilled in the art can also make appropriate changes and modifications to the above-described embodiments in light of the above disclosure. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (2)
1. An aluminum alloy with ceramic color sense anodic oxidation effect is characterized in that: comprises the following components in percentage by mass: 0.5 to 0.9 weight percent of Si, 0.7 to 1.0 weight percent of Mg, 0.5 to 0.9 weight percent of Cu, 0.15 to 0.35 weight percent of Mn, 0.19 to 0.55 weight percent of Cr, 0.001 to 0.15 weight percent of Zr, 0.001 to 0.35 weight percent of Fe, 0.001 to 0.05 weight percent of Ti, and the balance of Al and unavoidable impurities;
the mass ratio of Mn to Cr in the aluminum alloy is 0.5-0.8;
the glossiness of the anodized aluminum alloy is 300-330Gu;
the processing technology of the aluminum alloy with the ceramic color sense anodic oxidation effect comprises the following steps: weighing raw materials according to the mass percentage of each element in the aluminum alloy, and smelting and casting to obtain an ingot;
homogenizing the cast ingot, heating to 350-400 ℃ at room temperature, preserving heat for 4-15h, heating to 500-540 ℃ and preserving heat for 2-6h, and heating to 550-570 ℃ and preserving heat for 16-24h;
extruding the homogenized material, wherein the temperature of an extruding rod is 460-500 ℃, the extruding speed is 8-12 m/min, and the outlet temperature of the extruding material is 500-530 ℃;
aging the extruded material, and preserving the temperature for 5-180 minutes at 175-190 ℃.
2. The aluminum alloy with ceramic color sense anodic oxidation effect according to claim 1, wherein: the specific process of homogenizing the cast ingot is as follows: the room temperature is heated to 350-400 ℃ at 50-150 ℃ per hour, then is kept for 4-15 hours, is heated to 500-540 ℃ at 50-100 ℃ per hour, is kept for 2-6 hours, and is kept for 16-24 hours at 550-570 ℃ at 25-30 ℃ per hour.
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| JP2001220637A (en) * | 2000-02-04 | 2001-08-14 | Kobe Steel Ltd | Aluminum alloy for anodic oxidation treatment, aluminum alloy member having anodically oxidized film and plasma treating system |
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- 2022-12-13 CN CN202211595460.4A patent/CN115807183B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001220637A (en) * | 2000-02-04 | 2001-08-14 | Kobe Steel Ltd | Aluminum alloy for anodic oxidation treatment, aluminum alloy member having anodically oxidized film and plasma treating system |
| EP3299482A1 (en) * | 2016-09-21 | 2018-03-28 | Aleris Aluminum Duffel BVBA | High-strength 6xxx-series forging material |
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