CN111961934A - 5005 aluminum alloy for solar photovoltaic cell bracket and processing technology thereof - Google Patents
5005 aluminum alloy for solar photovoltaic cell bracket and processing technology thereof Download PDFInfo
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- CN111961934A CN111961934A CN202010903947.9A CN202010903947A CN111961934A CN 111961934 A CN111961934 A CN 111961934A CN 202010903947 A CN202010903947 A CN 202010903947A CN 111961934 A CN111961934 A CN 111961934A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Abstract
The invention relates to the technical field of aluminum alloy processing, in particular to a 5005 aluminum alloy for a solar photovoltaic cell bracket and a processing technology thereof. Sequentially comprises a raw material casting step, a homogenization step, an extrusion forming step and an aging treatment step; the raw material casting step comprises component optimization, wherein 5005 aluminum alloy is used as a base material for casting, and the optimized aluminum alloy comprises the following raw material components in percentage by weight: 0.9 to 1.1 weight percent of Mg, 0.25 to 0.30 weight percent of Si and less than or equal to 0.2 weight percent of Fe. The tensile strength of the prepared aluminum alloy is more than or equal to 150Mpa, the yield strength is more than or equal to 100Mpa, and the prepared aluminum alloy has better tensile strength than 5005 aluminum alloy in the prior art; can meet the performance requirements of high standard corrosion resistance and high tensile strength for the solar photovoltaic cell bracket, and has the advantage of long service life.
Description
Technical Field
The invention relates to the technical field of aluminum alloy processing, in particular to a 5005 aluminum alloy for a solar photovoltaic cell bracket and a processing technology thereof.
Background
Due to the increasing market demands for sustainable development of clean energy and the like, the technical application of solar energy has been rapidly developed in recent years. The aluminum alloy bracket has become one of the main application materials in the field of solar photovoltaic brackets based on the characteristics of attractive appearance and light weight. The 5005 series Al-Mg wrought aluminum alloy has the characteristics of good corrosion resistance, heat conductivity, welding performance, high elongation and the like, is commonly used as an electronic shell, a building ornament, an instrument panel, a marine section bar and the like, but has very little application in the field of solar photovoltaic cell supports.
The main reason is that although the 5005 series Al-Mg wrought aluminum alloy meets the requirements that the tensile strength of 5005-H112 is more than or equal to 100MPa and the yield strength is more than or equal to 40MPa according to the stipulations in GB/T6892 general industrial aluminum and aluminum alloy extruded sections, the relatively low tensile strength still causes that the service life of the prepared solar photovoltaic cell support does not meet the requirements of customers.
Therefore, a suitable process needs to be developed to improve the tensile strength of the 5005 aluminum alloy so as to meet the higher use requirement of the solar cell photovoltaic bracket, and the application of the 5005 aluminum alloy in the field of solar cell photovoltaic brackets is expanded.
Disclosure of Invention
The invention provides a 5005 aluminum alloy processing technology for a solar photovoltaic cell bracket and an aluminum alloy section thereof, wherein the tensile strength of the prepared aluminum alloy section is more than or equal to 150Mpa, the yield strength is more than or equal to 100Mpa, and the performance requirements of high-standard corrosion resistance and tensile strength for the solar photovoltaic cell bracket can be met.
In order to achieve the purpose, the invention adopts the following technical scheme:
a5005 aluminum alloy processing technology for a solar photovoltaic cell bracket sequentially comprises a raw material casting step, a homogenization step, an extrusion forming step and an aging treatment step; the raw material casting step comprises component optimization, wherein 5005 aluminum alloy is used as a base material for casting, and the optimized aluminum alloy comprises the following raw material components in percentage by weight: 0.9 to 1.1 weight percent of Mg, 0.25 to 0.30 weight percent of Si and less than or equal to 0.2 weight percent of Fe.
Preferably, the tensile strength of the 5005 aluminum alloy for the solar photovoltaic cell bracket is more than or equal to 150Mpa, and the yield strength is more than or equal to 100 Mpa.
Preferably, in the homogenization step, the homogenization temperature is 440-560 ℃.
Preferably, in the homogenization step, the homogenization time is 4 to 10 hours.
Preferably, in the homogenizing step, the cooling method after homogenizing is air cooling or water cooling.
Preferably, in the extrusion step, the extrusion outlet temperature is 510-550 ℃.
Preferably, in the extrusion step, the cooling quenching mode after extrusion molding is air cooling quenching or water cooling quenching.
Preferably, in the aging treatment step, the aging temperature is 195-210 ℃, and the aging treatment time is 5-10 hours.
Furthermore, the invention also provides an aluminum alloy section which is prepared by using the 5005 aluminum alloy processing technology for the solar photovoltaic cell bracket.
Further, the aluminum alloy profile is a 5005-series alloy.
The invention has the beneficial effects that:
the 5005 aluminum alloy processing technology for the solar photovoltaic cell bracket takes 5005 aluminum alloy as a base material and comprises the steps of casting raw materialsThe invention also provides a homogenizing temperature, homogenizing time and a cooling mode in the strict homogenizing step, and further optimizes and sets the outlet temperature, the cooling and quenching mode in the extrusion step and the temperature and time of aging treatment, thereby improving the hardness and Mg of the prepared aluminum alloy2The amount of Si strengthening phase precipitated.
The invention provides an aluminum alloy section which is prepared by using the 5005 aluminum alloy processing technology for solar photovoltaic cell supports, has the tensile strength of more than or equal to 150Mpa and the yield strength of more than or equal to 100Mpa, has better tensile strength than the 5005 aluminum alloy in the prior art, can meet the performance requirements of corrosion resistance and high tensile strength for the solar photovoltaic cell supports, and has the advantage of long service life.
Drawings
FIG. 1 shows good Mg on the surface of an aluminum alloy prepared by a 5005 aluminum alloy processing technology for a solar photovoltaic cell bracket according to an embodiment of the invention2An aluminum alloy surface effect diagram with uniform Si strengthening phase precipitation;
FIG. 2 is a surface effect diagram of an aluminum alloy with high Fe content and slag particles on the surface, prepared by a 5005 aluminum alloy processing process for a solar photovoltaic cell bracket according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a metallographic structure of an aluminum alloy with poor homogenization effect and more segregation of Mg and Si prepared by a 5005 aluminum alloy processing technology for a solar photovoltaic cell bracket according to an embodiment of the invention;
FIG. 4 is a schematic representation of a well-homogenized metallographic structure of an aluminum alloy produced by a 5005 aluminum alloy processing process for a solar photovoltaic cell bracket according to an embodiment of the invention;
FIG. 5 is a schematic representation of the homogenized over-temperature overburning metallographic structure of an aluminum alloy produced by a 5005 aluminum alloy processing process for a solar photovoltaic cell support according to an embodiment of the present invention;
fig. 6 is a graph of the aluminum alloy surface effect of pitting on the surface of the aluminum alloy caused by an excessively high extrusion outlet temperature of the aluminum alloy produced by the 5005 aluminum alloy processing process for solar photovoltaic cell supports according to one embodiment of the invention.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
A5005 aluminum alloy processing technology for a solar photovoltaic cell bracket sequentially comprises a raw material casting step, a homogenization step, an extrusion forming step and an aging treatment step; the raw material casting step comprises component optimization, wherein 5005 aluminum alloy is used as a base material for casting, and the optimized aluminum alloy comprises the following raw material components in percentage by weight: 0.9 to 1.1 weight percent of Mg, 0.25 to 0.30 weight percent of Si and less than or equal to 0.2 weight percent of Fe.
The 5005 aluminum alloy processing technology for the solar photovoltaic cell bracket takes 5005 as a base material, optimizes and controls Mg, Si and Fe in the components through a raw material casting step, and improves a homogenization step, an extrusion step and an aging treatment step, so that the prepared 5005 aluminum alloy for the solar photovoltaic cell bracket has a uniform metallographic structure, higher tensile strength of more than or equal to 150MPa, yield strength of more than or equal to 100MPa, more excellent corrosion resistance and suitability for anodic oxidation processing; the high-standard performance requirements of corrosion resistance and high tensile strength for the solar photovoltaic cell bracket are met, and the solar photovoltaic cell bracket has the advantage of long service life.
Mg and Si are main components influencing the hardness and the tensile strength of the material, and the content of Mg is set to be 0.9-1.1 wt% and the content of Si is set to be 0.25-0.30 wt% according to weight percentage;
if the Mg content exceeds 1.1 wt%, it is not 5005 alloyed and is a non-standard component; mg and Si elements are combined to form Mg2Si strengthening phase, the quantity of the strengthening phase is in positive correlation with the tensile strength of the aluminum alloy. The more Mg and Si elements, the more strengthening phases are formed, and the tensile strength of the aluminum alloy as a whole can be improved, as shown in FIG. 1. If the Mg content is less than 0.9 wt%, the final reinforcing phase Mg2The amount of Si is small, and the integral tensile strength of the aluminum alloy is reduced.
Similarly to the reason for the control of the content of Mg, if the content of Si exceeds 0.3 wt%If the alloy is not the 5005 standard alloy, the alloy is a non-standard product; if less than 0.25 wt%, the final reinforcing phase Mg2The amount of Si is small, and the integral tensile strength of the aluminum alloy is reduced.
Moreover, the influence of low Mg and Si components on the performance cannot be directly detected and distinguished by the conventional detection means of the existing factory because of the reinforced phase Mg2The size of Si is nanoscale and needs to be confirmed by metallographic structure comparative analysis. Therefore, it is difficult to find the root cause of the failure.
If the content of Mg or Si is less than the lower limit, the resulting aluminum alloy has a low tensile strength, which is lower than the 5005 tensile strength requirement of GB/T6892-2015 standard for general industrial aluminum and aluminum alloy extruded sections, resulting in unacceptable final properties and no remedy by the casting process.
Fe belongs to impurity elements, is contained in aluminum ingots or recycled raw materials, and cannot be completely absent; in actual production, the content of Fe exceeds 0.2%, and slag particles are easy to generate on the surface to cause scrapping, as shown in FIG. 2; if the requirement for the content of Fe is too low, it is not appropriate because the raw material of the metal inevitably contains a part of Fe, and the too high requirement for the reduction of the content of Fe leads to an increase in production cost. Since the actual Fe content will fluctuate with the batch, the control objective is to require as low as possible, for example, Fe content of 0.05-0.18 wt% and actual Fe content of only 0.02 wt%, which would require the addition of iron, contrary to the expectations of the process and is unnecessary.
Other chemical elements in the raw materials can be controlled according to the component requirement of 5005 of GB/T3190-2008 chemical compositions of wrought aluminum and aluminum alloy, which is detailed in Table 1 and does not need special control. The standard requirement range is not exceeded, otherwise, the aluminum alloy does not belong to the 5005 standard.
TABLE 1 GB/T3190 5005 alloy composition (wt.%) of 2008 deformed aluminum and aluminum alloy chemical compositions
| Chemical elements | Si | Fe | Cu | Mn | Mg | Cr | Zn | Other single | Other totals | Al |
| Content (%) | 0.3 | 0.7 | 0.2 | 0.2 | 0.5-1.1 | 0.10 | 0.25 | 0.05 | 0.15 | Balance of |
Preferably, the tensile strength of the 5005 aluminum alloy for the solar photovoltaic cell bracket is more than or equal to 150Mpa, and the yield strength is more than or equal to 100 Mpa.
Higher than the requirements of the GB/T6892 aluminum and aluminum alloy extruded section for general industry, which is specified by 5005-H112, that the tensile strength is more than or equal to 100MPa, and the yield strength, namely the specified non-proportional elongation strength, is more than or equal to 40 MPa; the performance standards that the tensile strength is more than or equal to 150Mpa and the yield strength is more than or equal to 100Mpa are set and maintained, so that the corrosion resistance and the tensile strength which meet the performance requirements of the aluminum alloy section of the solar photovoltaic cell bracket can be more effectively ensured, and the service life is longer.
Preferably, in the homogenization step, the homogenization temperature is 440-560 ℃.
The homogenization temperature is: 440 ℃ and 560 ℃. During the casting process, the metal elements of Mg and Si contained in the aluminum alloy are not completely uniformly distributed, and segregation exists to a certain extent, namely, the metal elements of Mg and Si are denser in some areas, and the segregation components do not participate in the formation of the Mg2Si strengthening phase after aging, so that the overall quantity of the Mg2Si strengthening phase is reduced under the condition that the proportion of the overall components is fixed. After homogenization treatment, the metal elements of Mg and Si are diffused at a higher temperature and are dissolved back into the aluminum alloy matrix, so that the component distribution of the whole Mg and Si is gradually uniform. And the diffused Mg and Si elements can participate in the formation of a subsequent Mg2Si strengthening phase, so that the tensile strength of the 5005 aluminum alloy for the solar photovoltaic cell bracket is improved.
The homogenization effect is obviously influenced when the temperature is lower than 440 ℃, as shown in figure 3, Mg and Si elements with more segregation are not easily dissolved back into the aluminum alloy matrix, and the subsequent strengthening phase Mg is influenced2The precipitation amount of Si reduces the tensile strength of the prepared aluminum alloy. Temperatures above 560 ℃ have a low effect on enhancing homogenization and increase energy costs. Extreme conditions, such as temperatures in excess of 630 c, can lead to overburning, as shown in fig. 5, i.e. segregation-aggregating elements do not have time to diffuse at too high temperatures, directly melting, such as the creation of triangular grain boundaries, which can destroy the microstructure of the entire aluminum alloy and become irreparable absolute scrap.
Preferably, in the homogenization step, the homogenization time is 4 to 10 hours.
The homogenization time is 4-10 hours. At a suitable homogenization temperature, the degree of homogenization gradually increases with increasing homogenization time until near complete homogenization; correspondingly, as the homogenization time is prolonged, the homogenization efficiency is gradually reduced, namely, the change rate of the homogenization time relative to the homogenization degree is gradually reduced. When the homogenization time is less than 4 hours, the homogenization is not thorough, and the tensile strength of the subsequently prepared aluminum alloy is influenced similarly to the condition that the homogenization temperature is too low. When the homogenization time is more than 10 hours, the aluminum alloy has already been homogenized, and further extension of the time has no effect and increases the cost.
Preferably, in the homogenizing step, the cooling method after homogenizing is air cooling or water cooling.
Through the homogenization treatment, the prepared aluminum alloy has high tensile strength, and the surface hardness of the prepared aluminum alloy can be improved by adopting an air-cooled or water-cooled rapid cooling mode, so that the 5005 aluminum alloy for the solar photovoltaic cell bracket has better service life and better production efficiency.
Preferably, in the extrusion step, the extrusion outlet temperature is 510-550 ℃.
The extrusion outlet temperature is controlled by adjusting the die temperature, the cast rod temperature, the extrusion cylinder temperature and the extrusion speed, and cannot be directly set. Temperatures above 550 c can affect surface quality and cause pitting leading to scrap, as shown in fig. 6. Temperatures below 510 c can affect the solutionizing effect and the resulting tensile strength of the resulting aluminum alloy can be reduced.
Preferably, in the extrusion step, the cooling quenching mode after extrusion molding is air cooling quenching or water cooling quenching.
After extrusion, air-cooling quenching or water-cooling quenching may be used. The metallographic structure of the aluminum alloy can generate structural deformation and change in hardness in the extrusion process, and the overall hardness of the prepared aluminum alloy can be improved through air cooling quenching or water cooling quenching, so that the 5005 aluminum alloy for the solar photovoltaic cell bracket has a longer service life and better production efficiency.
Preferably, in the aging treatment step, the aging temperature is 195-210 ℃, and the aging treatment time is 5-10 hours.
The aging temperature is 195-210 ℃, and the aging time is 5-10 hours; low ageing temperature or short ageing time, Mg2The precipitation amount of the Si strengthening phase is not enough, so that the integral tensile strength of the prepared aluminum alloy is influenced; high ageing temperature or over long ageing time, easy to make Mg2The Si precipitate phase grows up and also reduces the final tensile strength of the aluminium alloy produced.
The invention also provides an aluminum alloy section which is prepared by using the 5005 aluminum alloy processing technology for the solar photovoltaic cell bracket.
Further, the aluminum alloy profile is a 5005-series alloy.
Compared with the prior art, the aluminum alloy profile optimizes the contents of Mg, Si and Fe in the metal components of the 5005 alloy, and further optimizes the outlet temperature, the cooling and quenching mode in the extrusion step and the temperature and time of aging treatment in the homogenization step, thereby improving the hardness of the prepared aluminum alloy and the precipitation quantity of Mg2Si strengthening phases.
Examples and comparative examples
1. A5005 aluminum alloy processing technology for a solar photovoltaic cell bracket sequentially comprises a raw material casting step, a homogenization step, an extrusion forming step and an aging treatment step; the raw material casting step comprises component optimization, wherein 5005 aluminum alloy is used as a base material for casting, and the optimized aluminum alloy comprises the following raw material components in percentage by weight: 0.9 to 1.1 weight percent of Mg, 0.25 to 0.30 weight percent of Si and less than or equal to 0.2 weight percent of Fe;
in the homogenization step, the homogenization temperature is as follows: 440 ℃ and 560 ℃, the homogenization time is as follows: 4-10 hours; the cooling mode after homogenization is air cooling or water cooling;
in the extrusion step, the temperature of an extrusion outlet is 510-550 ℃; the cooling quenching mode after extrusion forming is air cooling quenching or water cooling quenching;
in the aging treatment step, the aging temperature is 195-210 ℃, and the aging treatment time is 5-10 hours;
2. the aluminum alloy section is prepared by the 5005 aluminum alloy processing technology for the solar photovoltaic cell bracket; the aluminum alloy section is 5005 series alloy, and meets the component requirement of the standard GB/T3190-2008 'deformed aluminum and aluminum alloy chemical composition' with the mark number of 5005; and the tensile strength is more than or equal to 150MPa, and the yield strength is more than or equal to 100 MPa.
3. The specific ingredients and processing parameters for each example and comparative example are detailed in tables 2 and 3, respectively.
4. The aluminum alloy sections obtained in the examples and comparative examples were subjected to appearance test and their tensile strength and yield strength (i.e., specified non-proportional elongation strength) were measured, and the results are shown in tables 2 and 3, respectively.
TABLE 2 information and test data relating to the examples
TABLE 3 comparative information and test data
The following analysis of information and test results according to the above respective examples and comparative examples shows that:
1. according to the specification of 5005-H112 in GB/T6892 aluminium and aluminium alloy extruded section for general industry, the tensile strength is more than or equal to 100MPa, and the yield strength is more than or equal to 40 MPa; the requirements of tensile strength more than or equal to 150MPa and yield strength more than or equal to 100MPa are also required to be met.
2. According to the detection results in the table 1, the aluminum alloy sections prepared in the examples 1 to 6 and the examples 1 to 6 are analyzed to have qualified and defect-free appearance, and fig. 1 is a schematic diagram of the related metallographic structure of the example 3; the tensile strength of the embodiments 1-6 is 163-;
3. comparative examples 1-6 were analyzed in comparison to example 3:
1) compared with the embodiment 3, the homogenization temperature of the comparative example 1 is 420, which is lower than the homogenization temperature of 440-560 ℃, and the homogenization effect is significantly influenced, as shown in fig. 3, the Mg and Si elements with more segregation cannot be redissolved in the aluminum alloy matrix, and the reinforcing phase Mg of the prepared aluminum alloy is influenced2The precipitation amount of Si reduces the tensile strength of the prepared aluminum alloy; therefore, the tensile strength of the aluminum alloy section prepared in the comparative example 1 is 86Mpa, the yield strength is 55Mpa, the requirements that the tensile strength is more than or equal to 150Mpa and the yield strength is more than or equal to 100Mpa are not met, and the detection conclusion is unqualified;
2) in contrast to example 3, the homogenization temperature of comparative example 2 is 630 ℃ and the temperature above 560 ℃ exceeds the range of the homogenization temperature of 440-560 ℃ and causes overburning, as shown in fig. 5, i.e., the segregation-aggregating elements do not reach the diffusion at the too high temperature and directly melt, creating triangular grain boundaries, causing the microstructure of the aluminum alloy of comparative example 2 to be destroyed and become irreparable absolute scrap; the tensile strength of the aluminum alloy section prepared in the comparative example 2 is 140MPa, the yield strength is 79MPa, the requirements that the tensile strength is more than or equal to 150MPa and the yield strength is more than or equal to 100MPa are not met, and the detection conclusion is unqualified;
3) compared with the embodiment 3, the extrusion outlet temperature of the comparative example 3 is 580 ℃, which exceeds the range of the extrusion outlet temperature of 510-;
4) compared with the embodiment 3, the extrusion outlet temperature of the comparative example 4 is 496 ℃ which is lower than the extrusion outlet temperature of 510-550 ℃, so that the solid solution effect of the aluminum alloy section of the comparative example 4 is poor, the measured tensile strength of the aluminum alloy section prepared by the comparative example 4 is 90MPa, the measured yield strength is 56MPa, the requirements that the tensile strength is not less than 150MPa and the yield strength is not less than 100MPa are not met, and the detection result is unqualified;
5) in contrast to example 3, comparative example 5 had Si content of 0.20 wt% lower than the range of 0.25 to 0.30 wt% of Si, and the aluminum alloy shaped material obtained in comparative example 5 had Mg as a reinforcing phase2The quantity of Si is less, the integral tensile strength of the aluminum alloy is reduced, the measured tensile strength of the aluminum alloy section prepared in the comparative example 5 is 133Mpa, the yield strength is 70Mpa, the requirements that the tensile strength is more than or equal to 150Mpa and the yield strength is more than or equal to 100Mpa are not met, and the detection conclusion is unqualified;
6) in contrast to example 3, comparative example 6 had a Mg content of 0.78 wt% lower than the range of 0.9 to 1.1 wt% and the aluminum alloy profile obtained in comparative example 6 had a reinforcing phase Mg2The quantity of Si is less, the integral tensile strength of the aluminum alloy is reduced, the measured tensile strength of the aluminum alloy section prepared in the comparative example 5 is 98Mpa, the yield strength is 61Mpa, the requirements that the tensile strength is more than or equal to 150Mpa and the yield strength is more than or equal to 100Mpa are not met, and the detection conclusion is unqualified;
7) compared with the embodiment 3, the Fe content of the comparative example 7 is 0.25 wt%, which is higher than the range that the Fe is less than or equal to 0.2 wt%, the Fe content exceeds 0.2%, slag particles are easy to generate on the surface of the aluminum alloy section to cause scrap, as shown in FIG. 2, the measured tensile strength of the aluminum alloy section prepared by the comparative example 7 is 155MPa, the yield strength is 110MPa, and the detection result is unqualified;
8) in contrast to example 3, comparative examples 8 and 9 differ in that: the aging treatment time of comparative example 8 was 20 hours, which is longer than the aging treatment time in the range of 5 to 10 hours; the aging temperature of comparative example 9 was 220 ℃ which is higher than the aging temperature in the range of 195- & ltSUB & gt & lt- & gt 210 ℃; high ageing temperature or over long ageing time, easy to make Mg2The precipitated phase of Si grows up, and the final tensile strength of the prepared aluminum alloy section is also reduced;the measured tensile strength of the aluminum alloy sections prepared in the comparative examples 8 and 9 is 148Mpa and 138Mpa respectively, the yield strength is 98Mpa and 84Mpa, and the detection conclusion is that the aluminum alloy sections are unqualified;
according to the analysis and detection results, the 5005 aluminum alloy processing technology for the solar photovoltaic cell bracket disclosed by the invention comprises the following raw material components in percentage by weight: 0.9 to 1.1 weight percent of Mg, 0.25 to 0.30 weight percent of Si and less than or equal to 0.2 weight percent of Fe;
in the homogenization step, the homogenization temperature is as follows: 440 ℃ and 560 ℃, the homogenization time is as follows: 4-10 hours; the cooling mode after homogenization is air cooling or water cooling;
in the extrusion step, the temperature of an extrusion outlet is 510-550 ℃; the cooling quenching mode after extrusion forming is air cooling quenching or water cooling quenching;
in the aging treatment step, the aging temperature is 195-210 ℃, and the aging treatment time is 5-10 hours;
the prepared aluminum alloy section is 5005 series alloy, and meets the component requirement of the standard GB/T3190-2008 'deformed aluminum and aluminum alloy chemical composition' with the trademark of 5005; and the slow tensile strength is more than or equal to 150Mpa, and the yield strength is more than or equal to 100 Mpa; belongs to 5005 aluminum alloy section bar suitable for solar photovoltaic cell bracket.
In conclusion, the invention optimizes the components of the 5005 aluminum alloy for the solar photovoltaic cell bracket, strictly controls the contents of Mg, Si and Fe, and improves the tensile strength of the prepared aluminum alloy section;
the aluminum alloy section has the tensile strength of 163-188MPa, the yield strength of 114-137, the fracture resistance higher than that of pure aluminum, good processing plasticity and excellent tensile processability.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. A5005 aluminum alloy processing technology for a solar photovoltaic cell bracket is characterized by sequentially comprising a raw material casting step, a homogenization step, an extrusion forming step and an aging treatment step; the raw material casting step comprises component optimization, wherein 5005 aluminum alloy is used as a base material for casting, and the optimized aluminum alloy comprises the following raw material components in percentage by weight: 0.9 to 1.1 weight percent of Mg, 0.25 to 0.30 weight percent of Si and less than or equal to 0.2 weight percent of Fe.
2. The 5005 aluminum alloy processing technology for solar photovoltaic cell bracket of claim 1, wherein the tensile strength of the prepared 5005 aluminum alloy for solar photovoltaic cell bracket is not less than 150Mpa, and the yield strength is not less than 100 Mpa.
3. The 5005 aluminum alloy processing process for solar photovoltaic cell bracket of claim 1, wherein in the homogenizing step, the homogenizing temperature is 440-560 ℃.
4. The 5005 aluminum alloy processing process for solar photovoltaic cell supports according to claim 3, wherein in the homogenizing step, the homogenizing time is 4-10 hours.
5. The 5005 aluminum alloy processing process for solar photovoltaic cell supports according to claim 4, wherein in the homogenizing step, the cooling mode after homogenizing is air cooling or water cooling.
6. The 5005 aluminum alloy processing process for solar photovoltaic cell supports as claimed in claim 1, wherein in the extrusion step, the extrusion outlet temperature is 510-550 ℃.
7. The 5005 aluminum alloy processing process for solar photovoltaic cell brackets according to claim 6, wherein in the extruding step, the cooling quenching mode after extrusion forming is air cooling quenching or water cooling quenching.
8. The 5005 aluminum alloy processing process for solar photovoltaic cell brackets according to claim 4, wherein in the aging treatment step, the aging temperature is 195-210 ℃, and the aging treatment time is 5-10 hours.
9. An aluminum alloy profile, which is characterized by being prepared by using the 5005 aluminum alloy processing technology for solar photovoltaic cell brackets in any one of claims 1 to 8.
10. An aluminium alloy profile according to claim 9, wherein the aluminium alloy profile is a 5005-series alloy.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114908274A (en) * | 2021-07-15 | 2022-08-16 | 福建安泰新能源科技有限公司 | Aluminum alloy for solar tracking photovoltaic bearing support and production process of section bar of aluminum alloy |
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