CN115927924A - High-strength aluminum profile for solar photovoltaic bracket and production method thereof - Google Patents
High-strength aluminum profile for solar photovoltaic bracket and production method thereof Download PDFInfo
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- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Manufacture And Refinement Of Metals (AREA)
Abstract
A high-strength aluminum profile for a solar photovoltaic bracket and a production method thereof are disclosed, wherein the aluminum profile comprises the following components in percentage by mass: 0.66-0.72% of Si, 0.62-0.68% of Mg, 0.05-0.15% of Cu, 0.05-0.15% of Mn, 0.05-0.15% of Cr, 0.02-0.03% of Ti, 0.004-0.006% of B, less than or equal to 0.2% of Fe, and the balance of Al and inevitable impurity elements, wherein the mass percentage of Si and Mg satisfies the following condition: si is more than or equal to Mg/1.73+0.3, and the sum of the mass percentages of Mn and Cr is less than or equal to 0.2 percent. The invention solves the problem that the improvement of production efficiency and performance cannot be considered at the same time, improves the mechanical property of the aluminum profile greatly while improving the extrusion speed by optimizing alloy components and regulating and controlling the quenching aging process, has the tensile strength of more than or equal to 310 MPa, the yield strength of more than or equal to 290 MPa and the elongation after fracture of more than or equal to 13 percent, and improves the safety and the service life of the solar photovoltaic power generation device.
Description
Technical Field
The invention belongs to the technical field of aluminum profile production, and particularly relates to a high-strength aluminum profile for a solar photovoltaic bracket and a production method thereof.
Background
With the implementation of a carbon-peak carbon-neutralization dual-carbon policy, the solar photovoltaic power generation industry is developed explosively in recent years. The bracket is an important component for bearing and fixing the solar photovoltaic power generation device. Because the solar photovoltaic power generation device is mainly installed in desert, gobi, grassland, beach or roof and the like with rare smoke, sufficient illumination and long illumination time, in order to resist severe environments such as storm, sand storm, snowstorm, marine corrosive climate and the like and improve the safety and service life of the solar photovoltaic power generation device, the solar photovoltaic power generation device provides higher requirements for the strength and the corrosion resistance of the bracket.
The traditional solar photovoltaic bracket material is mainly galvanized steel, the galvanized steel is high in strength, the manufacturing process is mature, the traditional solar photovoltaic bracket material is also the most common bracket material applied at present, and the defects that corrosion prevention maintenance is needed in the later period, and the operation and maintenance cost is high. Stainless steel has good corrosion resistance, but has high price and higher use cost. Compared with steel materials, the aluminum alloy has the advantages of low density, good corrosion resistance, anodic oxidation, high recycling rate and the like, the factors of construction, operation and maintenance cost, recycling and the like are comprehensively considered, and the trend of manufacturing the solar photovoltaic bracket by using the aluminum strip steel is towards the solar photovoltaic power generation industry.
The Chinese patent application with the publication number of CN113073239A discloses an aluminum alloy material for a solar photovoltaic frame bracket and a manufacturing method thereof, wherein the aluminum alloy material comprises the following components in percentage by mass: 0.57-0.63% of Si, 0.45-0.5% of Mg, 0.03-0.07% of Mn, 0-0.05% of Cu, 0-0.02% of Cr, 0-0.1% of Fe, 0-0.02% of Zn, 0.08-0.12% of Ti and the balance of Al, wherein the tensile strength of the aluminum alloy material is more than or equal to 270 MPa, the yield strength is more than or equal to 250 MPa, and the elongation is more than or equal to 10%.
Chinese patent application publication No. CN114908274A discloses an aluminum alloy for a solar tracking photovoltaic load-bearing support and a production process of a profile thereof, wherein the aluminum alloy material comprises the following components in percentage by mass: 0.7 to 0.9 percent of Si, less than or equal to 0.25 percent of Fe, less than or equal to 0.1 percent of Cu, 0.2 to 0.3 percent of Mn, 0.5 to 0.7 percent of Mg, 0.1 to 0.2 percent of Zn, less than or equal to 0.01 percent of Cr, 0.05 to 0.1 percent of Ti, less than or equal to 0.15 percent of the total content of other impurities, and the balance of aluminum, wherein the tensile strength of the aluminum alloy section is 291MPa, the yield strength is 271MPa, and the elongation after fracture is 10.5 percent.
The Chinese patent application with publication number CN108165846A discloses an aluminum alloy material for a solar photovoltaic bracket, which comprises the following components in percentage by mass: 0.1-0.5% of Si, 0.05-0.25% of Cu, 0.5-0.85% of Mg, 0.1-0.3% of Zr, 0.1-0.25% of Ti, 0.01-0.15% of Mn and the balance of aluminum and inevitable impurities.
From production practice and literature data retrieval results, the strength and corrosion resistance of the existing aluminum profile are still low, and the requirement of a bearing support of a solar photovoltaic power generation device is difficult to meet. In addition, the strength of the aluminum profile is improved, the extrusion speed of the aluminum profile is reduced, the production efficiency is reduced, and the development requirement of reducing the production cost in the solar photovoltaic power generation industry is difficult to meet. Therefore, the existing aluminum profile for solar photovoltaic bracket and the production method thereof still need to be improved and developed.
Disclosure of Invention
The invention aims to solve the problems and the defects, and provides the high-strength aluminum profile for the solar photovoltaic bracket and the production method thereof.
The technical scheme of the invention is realized as follows:
the invention provides a high-strength aluminum profile for a solar photovoltaic bracket, which is characterized by comprising the following components in percentage by mass: 0.66 to 0.72 percent of Si, 0.62 to 0.68 percent of Mg, 0.05 to 0.15 percent of Cu, 0.05 to 0.15 percent of Mn, 0.05 to 0.15 percent of Cr, 0.02 to 0.03 percent of Ti, 0.004 to 0.006 percent of B, less than or equal to 0.2 percent of Fe, the balance of Al and inevitable impurity elements, wherein the single content of the inevitable impurity elements is less than or equal to 0.05 percent, and the total content of the impurity elements is less than or equal to 0.15 percent.
The main function of Si and Mg is to enhance the strength of the aluminum profile. Si and Mg may form Mg 2 The Si strengthening phase obviously enhances the strength of the aluminum profile. The contents of Si and Mg cannot be too low, and the strength of the aluminum profile is not sufficient. The contents of Si and Mg cannot be too high, and the strength of the aluminum profile is too high, so that the extrusion speed is difficult to increase. In addition, si forms Mg in addition to Mg 2 In addition to the Si strengthening phase, intermetallic compounds are formed with Fe, consuming part of Si. Therefore, in order to obtain a sufficient amount of Mg 2 The Si strengthening phase, the ratio of Si to Mg must also be strictly controlled. Preferably, the mass percentage of Si and Mg in the invention satisfies: si is more than or equal to Mg/1.73+0.3.
The main function of Cu is to further enhance the strength of the aluminum profile. Cu and Al can form CuAl 2 The strength of the aluminum profile is obviously enhanced. The Cu content cannot be too low, and the strength of the aluminum profile is not sufficient. But the Cu content cannot be too high, and the extrusion difficulty of the aluminum profile can be increased and the corrosion resistance of the aluminum profile can be reduced. Therefore, the mass percentage of Cu is set to 0.05-0.15% in the present invention.
Furthermore, the aluminum profile also contains trace Mn and Cr elements, wherein the mass percent of Mn is 0.05-0.15%, the mass percent of Cr is 0.05-0.15%, and the sum of the mass percent of Mn and Cr satisfies that Mn + Cr is less than or equal to 0.2%.
The growth and the shape of recrystallized grains occur in the extrusion process of the aluminum profileAnd the aluminum profile becomes a coarse grain structure, so that the strength and the plasticity of the aluminum profile are seriously reduced. In order to prevent the occurrence of coarse grain structure, the inventors have surprisingly found through experimental studies that the Mn and Cr elements are added in a compound manner in trace amounts, and form MnAl in the aluminum alloy 6 、CrAl 7 、(Cr,Mn)Al 12 The particles can block the slippage of dislocation and the migration of crystal boundary, prevent the growth of crystal grains and improve the strength and the plasticity of the aluminum profile. If the addition amounts of Mn and Cr are not too low, the growth of crystal grains cannot be suppressed. The total addition amount of Mn and Cr is not too high, and coarse intermetallic compounds are easily formed, so that the deformation resistance and the extrusion difficulty of the aluminum alloy are increased. Preferably, the sum of the mass percentages of Mn and Cr satisfies: mn + Cr is less than or equal to 0.2 percent.
Ti and B are added into the aluminum alloy liquid in the form of Al5Ti1B alloy rods, and mainly have the functions of refining grains of the aluminum alloy round rod, improving the uniformity of the structural components of the aluminum alloy round rod, reducing the deformation resistance of the aluminum alloy round rod and improving the extrusion speed and the production efficiency of the aluminum profile. The contents of Ti and B cannot be too low, and the grain-refining effect is not significant. The content of Ti and B is too high, which does not increase the grain refining effect obviously, but increases the production cost. Therefore, the mass percent of Ti is 0.02-0.03%, and the mass percent of B is 0.004-0.006%.
Fe is an inevitable impurity element in the aluminum alloy. Fe can form thick needle-like and flaky Fe-rich phases in the aluminum alloy, so that the extrusion difficulty of the aluminum profile can be increased, the aluminum matrix can be cut, the aluminum profile can become a cracked crack source and a crack propagation direction, and the strength and the plasticity of the aluminum profile are seriously damaged. Therefore, in order to increase the extrusion speed and obtain high-strength aluminum profiles, the content of Fe is strictly controlled to be less than or equal to 0.2 percent.
The invention provides a production method of a high-strength aluminum profile for a solar photovoltaic bracket, which is characterized by sequentially comprising the following steps of:
(1) According to the composition and mass percentage of the aluminum profile, selecting an aluminum source, a silicon source, a magnesium source, a copper source, a manganese source and a chromium source as raw materials for proportioning;
(2) Adding the raw materials into a heat accumulating type fuel gas aluminum melting furnace, heating and melting the raw materials into aluminum alloy liquid at 720-760 ℃, and then starting a permanent magnetic stirring device to stir the aluminum alloy liquid in the furnace;
(3) Blowing, refining, degassing and removing impurities of aluminum alloy liquid in an aluminum melting furnace by using inert gas and a refining agent, slagging off and then standing for a period of time;
(4) Introducing the aluminum alloy liquid into a launder, and then adding an Al5Ti1B alloy rod accounting for 0.4-0.6% of the total weight of the raw materials for online grain refinement treatment;
(5) Enabling the aluminum alloy liquid to sequentially flow through a degassing box and a filtering box which are arranged on a launder to carry out online degassing and filtering treatment;
(6) Semi-continuously casting the aluminum alloy liquid into an aluminum alloy round bar under the conditions that the temperature is 680-720 ℃ and the casting speed is 100-200 mm/min;
(7) Heating the aluminum alloy round bar to 590-600 ℃, and preserving heat for 10-12 hours to carry out homogenization treatment;
(8) Heating an aluminum alloy round bar at 520-540 ℃, extruding the aluminum alloy round bar into an aluminum profile, and then spraying water mist to cool the aluminum profile to room temperature;
(9) And stretching and straightening the aluminum profile, then heating to 210-220 ℃, preserving heat for 2-3 hours, carrying out aging treatment, and cooling to obtain the high-strength aluminum profile.
In the step (1), the raw materials can be process waste materials generated in the production process of pure metals, alloys and aluminum alloys or recycled waste metals and the like, as long as the components of the aluminum profiles can meet the requirements and the impurity elements do not exceed the standard. Preferably, the aluminum source is an aluminum ingot with the purity of more than or equal to 99.7%, the magnesium source is a magnesium ingot with the purity of more than or equal to 99.8%, the silicon source is aluminum-silicon alloy, the copper source is aluminum-copper alloy, the manganese source is aluminum-manganese alloy, and the chromium source is aluminum-chromium alloy.
In the step (2), in order to improve the uniformity of the composition of the aluminum alloy liquid, it is necessary to enhance the stirring of the aluminum alloy liquid in the aluminum melting furnace. Preferably, a heat accumulating type gas aluminum melting furnace with a permanent magnet stirring device is selected, after the aluminum alloy liquid is melted, the permanent magnet stirring device is started, the aluminum alloy liquid is stirred for 15-25 minutes in a circulation mode of forward rotation for 5 minutes and then reverse rotation for 5 minutes, and segregation of the components of the aluminum alloy liquid can be prevented. The raw materials are low in heating and melting temperature, the melting speed is low, and the production efficiency is low. The high melting temperature increases the burning loss of the raw material although the melting speed is high. Preferably, the melting temperature is 720-760 ℃. In addition, after melting and stirring, the components of the aluminum alloy liquid need to be detected on site, and if the components are unqualified, the aluminum alloy liquid needs to be supplemented until the components of the aluminum alloy liquid are qualified.
In the step (3), in order to improve the purity of the aluminum alloy liquid, refining, degassing and impurity removal of the aluminum alloy liquid in the aluminum melting furnace are required to be enhanced. Preferably, argon with the purity of more than or equal to 99.99 percent and a refining agent accounting for 0.2 to 0.4 percent of the total weight of the raw materials are selected to carry out blowing refining on the aluminum alloy liquid. The blowing refining time is not short enough or long enough, and preferably 15-25 minutes. Still standing the aluminum alloy liquid for a period of time after refining is required to obtain sufficient separation time of the bubbles and inclusions remaining in the aluminum alloy liquid, and preferably, the standing time is 30 to 60 minutes.
In the step (3), preferably, the refining agent consists of the following components in percentage by mass: mgCl 2 30-45%，KCl 25-40%，KBF 4 5-10%，K 2 ZrF 6 5-10%，SrCO 3 6-8%，LiCl 3-5%，BaCl 2 2-4%, wherein the refining agent is obtained by remelting, namely the refining agent is heated in a vacuum furnace with the vacuum degree of 10-20Pa for 1-2 hours at 900-1100 ℃, and is crushed and screened after being cooled and solidified to obtain the refining agent with the particle size of less than or equal to 2 mm.
The air holes and the inclusions can cut the aluminum matrix, destroy the structural continuity of the aluminum alloy, reduce the strength, the plasticity and the corrosion resistance of the aluminum alloy, increase the deformation resistance and increase the extrusion difficulty. The existing refining agent is obtained by directly mixing raw materials, and although the method is simple and low in cost, the interaction among the components of the refining agent is not fully exerted, which is also an important reason for low efficiency of degassing and impurity removal of the existing refining agent. In addition, the existing refining agent also commonly contains a large amount of villiaumite, nitrate, sulfate, hexachloroethane and the like, and a large amount of irritant and unpleasant smoke gas such as hydrogen fluoride, sulfur dioxide and the like is produced in the refining process, so that the environmental pollution and the harm to the human health are caused.
In order to improve the cleanliness of the aluminum alloy liquid in the furnace, reduce the deformation resistance of the aluminum alloy and improve the strength, plasticity and corrosion resistance of the aluminum alloy, the inventor develops a more efficient and environment-friendly remelting type refining agent through a large amount of experimental research, the components of the refining agent can be fused and crystallized with each other through high-temperature remelting, the melting point of the refining agent is reduced, and the refining agent is easier to be dissolved in the aluminum alloy liquid. Meanwhile, the components of the refining agent can generate mutually promoted physical and chemical actions, so that the refining agent has higher degassing and impurity removing efficiency. Such as MgCl 2 Has a melting point of 712 deg.C and a melting point of KCl of 770 deg.C, and when the refining agent is remelted at a high temperature, mgCl 2 And KCl can form MgCl with melting point lower than 500 deg.C 2 KCl eutectic, the melting temperature of the refining agent is obviously reduced, so that the refining agent is easier to melt in the aluminum alloy liquid, and better degassing and impurity removing effects are achieved.
Wherein, mgCl 2 And KCl is the main component of the refining agent, mgCl 2 And KCl and aluminum alloy liquid react to generate AlCl with the boiling point of only 182.7 DEG C 3 ，AlCl 3 The bubbles can adsorb partial hydrogen and impurities in the aluminum alloy liquid floating process, so that the effects of degassing, removing impurities and purifying are achieved. Partial MgCl 2 And KCl is directly decomposed under the heat action of high-temperature aluminum alloy liquid to release Cl + Ions, cl + Ions react with hydrogen in the aluminum alloy liquid to generate HCl gas, HCl bubbles further adsorb and take away impurities in the process of overflowing the aluminum alloy liquid, and the efficient degassing, impurity removal and purification effects are achieved.
K 2 ZrF 6 And KBF 4 Can react with aluminum alloy liquid to generate KAlF 4 、K 3 AlF 6 And ZrB 2 Reaction to give KAlF 4 And K 3 AlF 6 Is in molten salt state, has large surface tension, is not infiltrated with aluminum alloy liquid, and is suitable for Al 2 O 3 The oxide inclusions have good dissolving and wetting effects and can promote Al 2 O 3 And the separation of oxide inclusions and aluminum alloy liquid is carried out, so that the impurity removal and purification effects are improved. ZrB as a by-product obtained by the reaction 2 Can be used as heterogeneous nucleation core for aluminum alloy liquid solidification to perform refiningThe effect of the crystal grains is beneficial to obtaining the aluminum alloy round bar with finer and more uniform crystal grains, and the deformation resistance of the aluminum alloy round bar is reduced.
Fe is an inevitable impurity element in aluminum alloys, in which Al is usually used 3 Fe、FeSiAl 3 、Fe 2 SiAl 8 、Fe 2 Si 2 Al 9 、Fe 3 Si 2 Al 12 The existence of coarse needle-like or flake-like Fe-rich phase can damage the strength, plasticity and corrosion resistance of the aluminum alloy, increase the deformation resistance of the aluminum alloy round bar and reduce the extrusion speed. In order to improve the degassing and impurity-removing efficiency of the refining agent and eliminate the harm of coarse Fe-rich phase, the inventor finds that a small amount of SrCO is added into the refining agent through a large amount of experimental research 3 LiCl and BaCl 2 ，SrCO 3 CO can be decomposed in high-temperature aluminum alloy liquid 2 LiCl and BaCl 2 Can react in aluminum alloy liquid to generate AlCl with the boiling point of only 183 DEG C 3 ，CO 2 And AlCl 3 The bubbles can absorb and take away hydrogen and Al in the floating process 2 O 3 And the impurities are removed by degassing. Sr, li and Ba elements obtained by reaction enter the aluminum alloy liquid, and the thick Fe-rich phase is refined and modified in the aluminum alloy solidification process, so that the thick needle-like or sheet Fe-rich phase is converted into fine particles and is dispersed and distributed in the aluminum matrix, the harm of the thick Fe-rich phase can be eliminated, the deformation resistance of the aluminum alloy round bar is reduced, and the extrusion performance of the aluminum alloy round bar and the strength, plasticity and corrosion resistance of the aluminum alloy round bar are improved.
In the step (4), in order to improve the structural component uniformity of the aluminum alloy round bar and improve the extrusion processing performance of the aluminum bar, the aluminum alloy liquid needs to be subjected to grain refinement treatment. The grain refiner can be aluminum-titanium-boron alloy, aluminum-titanium-carbon alloy, and the like. Preferably, the grain refiner is Al5Ti1B alloy rod, the addition amount is 0.4-0.6% of the total weight of the raw materials, and the grain refiner is added into the aluminum alloy liquid on a runner before semi-continuous casting, so that the best grain refining effect can be achieved.
In the step (5), the aluminum matrix is cracked by the pores and the impurities, so that the plasticity and the extrusion speed of the aluminum alloy round bar are reduced. In order to further improve the purity of the aluminum alloy liquid, online degassing and filtering treatment needs to be carried out on the aluminum alloy liquid before casting, namely the aluminum alloy liquid sequentially flows through a degassing box and a filtering box which are arranged on a flow groove, and high-purity aluminum alloy liquid is obtained through online degassing and filtering treatment, so that the plasticity of the round aluminum alloy rod is improved. Preferably, the rotation speed of the graphite rotor in the degassing box is 500-600 revolutions per minute, the gas flow is 1.5-2.5 cubic meters per hour, the gas pressure is 0.35-0.45MPa, the gas is a mixed gas consisting of argon with the purity of more than or equal to 99.99% and chlorine with the purity of more than or equal to 99.99%, the volume percentage of the chlorine is 1-5%, and two foamed ceramic filter plates with the front 50 meshes and the rear 80 meshes are arranged in the filter box.
In the step (6), in order to obtain high-quality aluminum alloy round bars and prevent casting accidents, strict adherence to the operating rules of semi-continuous casting and strict control of technological parameters of semi-continuous casting are required. The diameter of the aluminum alloy round bar is small, the casting speed can be higher, the diameter of the aluminum alloy round bar is large, and the casting speed is lower. The temperature of the casting machine cooling water cannot exceed 50 ℃. Preferably, the temperature of the aluminum alloy liquid is 680-720 ℃, the speed of the semi-continuous casting is 100-200 mm/min, and the temperature of the cooling water of the semi-continuous casting machine is 20-40 ℃.
In the step (7), the aluminum alloy round bar is homogenized for the purpose of eliminating element segregation of the aluminum alloy round bar, melting coarse second-phase compounds, eliminating stress of the aluminum alloy round bar and improving extrusion performance of the aluminum alloy round bar. Too low a homogenization temperature or too short a time may result in incomplete homogenization. Too high a homogenizing temperature can cause the aluminum alloy round bar to be over-burnt, and the extrusion performance and the mechanical property of the aluminum alloy are deteriorated. Preferably, the homogenizing temperature of the aluminum alloy round bar is 590-600 ℃, and the homogenizing time is 10-12 hours.
In the step (8), due to the fact that trace Mn and Cr elements are added to the aluminum alloy in a compounding mode, growth of crystal grains can be effectively inhibited, meanwhile, the aluminum alloy round bar has lower deformation resistance, extrusion can be conducted at higher temperature and higher speed, production efficiency is improved, and meanwhile, the aluminum profile cannot generate coarse crystals. Preferably, the heating temperature of the aluminum alloy round bar is 520-540 ℃, the machine temperature of the extrusion die is 480-500 ℃, and the advancing speed of the extrusion rod is 25-35 mm/s. The aluminum profile obtained by extrusion can be subjected to air cooling, water spray cooling, water mist combined cooling, water trough through cooling and the like. In order to increase the cooling rate while avoiding deformation, it is preferable to use water mist cooling.
In the step (9), the cooled aluminum profile needs to be stretched and straightened, the deformation of the stretching and straightening is not too small or too large, and the aluminum profile cannot obtain the required size. Preferably, the amount of deformation for stretch straightening is 1 to 3%. The aging treatment is an important process for improving the strength of the aluminum profile, and after a great deal of experimental research on the aging process of the aluminum profile, the inventor finds that the aluminum profile can be heated to 210-220 ℃ and insulated for 2-3 hours for aging, and then cooled along with a furnace or air cooled to room temperature, so that the aluminum profile with the highest strength can be obtained, meanwhile, the heating time is obviously shortened, the production efficiency is improved, the production cost is reduced, and the market competitiveness is improved. The aging temperature is higher than 220 ℃, the aging time is longer than 3 hours, or the aging temperature is lower than 210 ℃ or the aging time is shorter than 2 hours, and the aluminum profile with the required strength cannot be obtained.
The above adopted devices and equipment are all the prior art except the degassing tank and the filtering tank, and the preparation of the aluminum profile can be realized, so the specific structure of the aluminum profile is not described in detail herein, and the aluminum profile is easily understood by those skilled in the art.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, by scientifically designing the composition of the aluminum alloy, improving the cleanliness of the aluminum alloy liquid, refining and homogenizing the tissue composition of the aluminum alloy round bar, the deformation resistance of the aluminum alloy round bar is reduced, the extrusion speed and the production efficiency of the aluminum profile are greatly improved, and the problem of contradiction between the strength and the extrusion production efficiency is solved;
(2) The refining agent developed and used by the invention has higher degassing and impurity removing effects, has refining and modifying effects on the aluminum alloy, can reduce the deformation resistance of the aluminum alloy, and improves the extrusion performance, the mechanical performance and the corrosion resistance. The refining agent contains less villaumite, does not contain nitrate, sulfate, hexachloroethane and the like, and is more environment-friendly to use;
(3) The tensile strength of the aluminum profile is more than or equal to 310 MPa, the yield strength is more than or equal to 290 MPa, the elongation after fracture is more than or equal to 13%, the Vickers hardness is more than or equal to 16, compared with a 6005A aluminum profile, the strength is improved by 15%, the plasticity is improved by 30%, the strength, the plasticity and the corrosion resistance are higher, and the requirement of a solar photovoltaic power generation device on a high-strength corrosion-resistant aluminum profile is met.
Drawings
FIG. 1 is a photograph of the grain structure on the cross section of the aluminum profile of example 1.
FIG. 2 is a photograph of the grain structure on the cross section of the aluminum profile of example 2.
FIG. 3 is a photograph of the grain structure on the cross section of the aluminum profile of example 3.
FIG. 4 is a photograph of the grain structure on the cross section of the aluminum profile of example 4.
Detailed Description
Example 1:
the aluminum profile comprises the following components in percentage by mass: 0.68% of Si, 0.65% of Mg, 0.12% of Cu, 0.09% of Mn, 0.08% of Cr, 0.025% of Ti, 0.005% of B, less than or equal to 0.2% of Fe, the balance of Al and inevitable impurity elements, wherein the single content of the inevitable impurity elements is less than or equal to 0.05%, and the total amount of the impurity elements is less than or equal to 0.15%. The production method sequentially comprises the following steps: (1) According to the composition and mass percentage of the aluminum profile, selecting an aluminum ingot with the purity of 99.7 percent, a magnesium ingot with the purity of 99.8 percent, an aluminum-silicon alloy, an aluminum-copper alloy, an aluminum-manganese alloy and an aluminum-chromium alloy as raw materials for proportioning; (2) Adding the raw materials into a heat accumulating type gas aluminum melting furnace, heating and melting the raw materials into aluminum alloy liquid at 740 ℃, then starting a permanent magnetic stirring device, and stirring the aluminum alloy liquid for 20 minutes by adopting a circulation mode of forward rotation for 5 minutes and then reverse rotation for 5 minutes; (3) The method comprises the following steps of blowing and refining aluminum alloy liquid in an aluminum melting furnace for 20 minutes by using argon with the purity of 99.99% and a refining agent accounting for 0.3% of the total weight of raw materials, slagging off and standing for 45 minutes, wherein the refining agent comprises the following components in percentage by mass: mgCl 2 40.3%，KCl 34.1%，KBF 4 6.3%，K 2 ZrF 6 6.5%，SrCO 3 7.1%，LiCl 3.3%，BaCl 2 2.4%, and the refining agent is obtained by remelting: drying and dehydrating the refining agent, heating for 1.5 hours at 1000 ℃ in a vacuum furnace with the vacuum degree of 15 Pa, cooling, solidifying, crushing and screening to obtain the refining agent with the particle size of less than or equal to 2 mm; (4) Introducing the aluminum alloy liquid into a launder, and then adding an Al5Ti1B alloy rod accounting for 0.5 percent of the total weight of the raw materials for online grain refinement treatment; (5) Enabling the aluminum alloy liquid to sequentially flow through a degassing box which is arranged on a launder and has the rotation speed of a graphite rotor of 550 revolutions per minute, the gas flow of 2 cubic meters per hour and the gas pressure of 0.4MPa and a filter box which is provided with two foamed ceramic filter plates of the front 50 meshes and the rear 80 meshes to carry out online degassing and filtering treatment, wherein the gas is a mixed gas consisting of argon with the purity of 99.99 percent and chlorine with the purity of 99.99 percent, and the volume percentage of the chlorine is 2.5 percent; (6) Semi-continuously casting aluminum alloy liquid into an aluminum alloy round bar under the conditions that the temperature is 700 ℃ and the casting speed is 150 mm/min; (7) Heating the aluminum alloy round bar to 595 ℃, and preserving heat for 11 hours to carry out homogenization treatment; (8) Heating an aluminum alloy round bar to 530 ℃, extruding the aluminum alloy round bar into an aluminum profile under the conditions that the machine temperature of a die is 490 ℃ and the pushing speed of an extrusion rod is 30 mm/s, and then spraying water mist to cool the aluminum profile to room temperature; (9) And stretching and straightening the aluminum profile, then heating to 215 ℃, preserving heat for 2.5 hours, carrying out aging treatment, and cooling to obtain the high-strength aluminum profile for the solar photovoltaic bracket.
Example 2:
the aluminum profile comprises the following components in percentage by mass: 0.66 percent of Si, 0.62 percent of Mg, 0.05 percent of Cu, 0.12 percent of Mn, 0.06 percent of Cr, 0.02 percent of Ti, 0.004 percent of B, less than or equal to 0.2 percent of Fe, the balance of Al and inevitable impurity elements, wherein the single content of the inevitable impurity elements is less than or equal to 0.05 percent, and the total content of the impurity elements is less than or equal to 0.15 percent. The production method sequentially comprises the following steps: (1) According to the composition and mass percentage of the aluminum profile, selecting an aluminum ingot with the purity of 99.7 percent, a magnesium ingot with the purity of 99.8 percent, an aluminum-silicon alloy, an aluminum-copper alloy, an aluminum-manganese alloy and an aluminum-chromium alloy as raw materials for proportioning; (2) Adding the raw materials into a heat accumulating type gas aluminum melting furnace, heating and melting the raw materials into aluminum alloy liquid at 760 ℃, and then starting permanent magnet stirringA device for stirring 25 the aluminum alloy liquid by adopting a circulation mode of forward rotation for 5 minutes and then reverse rotation for 5 minutes; (3) The method comprises the following steps of blowing and refining aluminum alloy liquid in an aluminum melting furnace for 25 minutes by using argon with the purity of 99.99% and a refining agent accounting for 0.4% of the total weight of raw materials, slagging off and standing for 30 minutes, wherein the refining agent comprises the following components in percentage by mass: mgCl 2 30.2%，KCl 39.8%，KBF 4 7.3%，K 2 ZrF 6 9.9%，SrCO 3 6.1%，LiCl 3.4%，BaCl 2 3.3 percent, and the refining agent is obtained by remelting: drying and dehydrating the refining agent, heating for 1 hour at 1100 ℃ in a vacuum furnace with the vacuum degree of 10 Pa, cooling, solidifying, crushing and screening to obtain the refining agent with the particle size of less than or equal to 2 mm; (4) Introducing the aluminum alloy liquid into a launder, and then adding an Al5Ti1B alloy rod accounting for 0.4 percent of the total weight of the raw materials for online grain refinement treatment; (5) Enabling the aluminum alloy liquid to sequentially flow through a degassing box which is arranged on a launder and has the rotation speed of 600 revolutions per minute, the gas flow rate of 1.5 cubic meters per hour and the gas pressure of 0.35MPa and a filtering box which is provided with two foamed ceramic filtering plates of the front 50 meshes and the rear 80 meshes to carry out online degassing and filtering treatment, wherein the gas is a mixed gas consisting of argon with the purity of 99.99 percent and chlorine with the purity of 99.99 percent, and the volume percentage of the chlorine is 1 percent; (6) Semi-continuously casting the aluminum alloy liquid into aluminum alloy round bars under the conditions that the temperature is 720 ℃ and the casting speed is 100 mm/min; (7) Heating the aluminum alloy round bar to 600 ℃, and preserving heat for 10 hours to carry out homogenization treatment; (8) Heating an aluminum alloy round bar to 540 ℃, extruding the aluminum alloy round bar into an aluminum profile under the conditions that the machine temperature of a die is 500 ℃ and the pushing speed of an extrusion rod is 35 mm/s, and then spraying water mist to cool the aluminum profile to room temperature; (9) And stretching and straightening the aluminum profile, heating to 210 ℃, preserving heat for 3 hours, carrying out aging treatment, and cooling to obtain the high-strength aluminum profile for the solar photovoltaic bracket.
Example 3:
the aluminum profile comprises the following components in percentage by mass: 0.72 percent of Si, 0.68 percent of Mg, 0.15 percent of Cu, 0.08 percent of Mn, 0.12 percent of Cr, 0.03 percent of Ti, 0.006 percent of B, less than or equal to 0.2 percent of Fe, the balance of Al and inevitable impurity elements, the single content of the inevitable impurity elements is less than or equal to 0.05 percent,the total amount of impurity elements is less than or equal to 0.15 percent. The production method sequentially comprises the following steps: (1) According to the composition and mass percentage of the aluminum profile, selecting an aluminum ingot with the purity of 99.7 percent, a magnesium ingot with the purity of 99.8 percent, an aluminum-silicon alloy, an aluminum-copper alloy, an aluminum-manganese alloy and an aluminum-chromium alloy as raw materials for proportioning; (2) Adding raw materials into a heat accumulating type gas aluminum melting furnace, heating and melting the raw materials into aluminum alloy liquid at 720 ℃, then starting a permanent magnetic stirring device, and stirring the aluminum alloy liquid by adopting a circulation mode of forward rotation for 5 minutes and then reverse rotation for 5 minutes for 15; (3) Blowing and refining aluminum alloy liquid in an aluminum melting furnace for 15 minutes by using argon with the purity of 99.99 percent and a refining agent accounting for 0.2 percent of the total weight of the raw materials, slagging off and standing for 60 minutes, wherein the refining agent comprises the following components in percentage by mass: mgCl 2 44.8%，KCl 25.2%，KBF 4 5.3%，K 2 ZrF 6 5.1%，SrCO 3 6.7%，LiCl 3.9%，BaCl 2 2.0%, and the refining agent is obtained by remelting: drying and dehydrating the refining agent, heating for 2 hours at 900 ℃ in a vacuum furnace with the vacuum degree of 20Pa, cooling, solidifying, crushing and screening to obtain the refining agent with the particle size of less than or equal to 2 mm; (4) Introducing the aluminum alloy liquid into a launder, and then adding an Al5Ti1B alloy rod accounting for 0.6 percent of the total weight of the raw materials for online grain refinement treatment; (5) Enabling the aluminum alloy liquid to sequentially flow through a degassing box which is arranged on a launder and has the rotation speed of a graphite rotor of 500 revolutions per minute, the gas flow of 2.5 cubic meters per hour and the gas pressure of 0.45MPa and a filter box which is provided with two foamed ceramic filter plates of the front 50 meshes and the rear 80 meshes to carry out online degassing and filtering treatment, wherein the gas is a mixed gas consisting of argon with the purity of 99.99 percent and chlorine with the purity of 99.99 percent, and the volume percentage of the chlorine is 5 percent; (6) Semi-continuously casting the aluminum alloy liquid into an aluminum alloy round bar under the conditions that the temperature is 680 ℃ and the casting speed is 200 mm/min; (7) Heating the aluminum alloy round bar to 590 ℃, and preserving heat for 12 hours to carry out homogenization treatment; (8) Heating an aluminum alloy round bar to 520 ℃, extruding the aluminum alloy round bar into an aluminum profile under the conditions that the on-machine temperature of a die is 480 ℃ and the pushing speed of an extrusion rod is 25 mm/s, and then spraying water mist to cool the aluminum profile to room temperature; (9) Stretching and straightening the aluminum profile, heating to 220 ℃, preserving heat for 2 hours, performing aging treatment, and cooling to obtain the aluminum profileThe high-strength aluminum profile for the solar photovoltaic bracket.
Example 4:
the aluminum profile comprises the following components in percentage by mass: 0.67% of Si, 0.64% of Mg, 0.09% of Cu, 0.05% of Mn, 0.15% of Cr, 0.025% of Ti, 0.005% of B, less than or equal to 0.2% of Fe, and the balance of Al and inevitable impurity elements, wherein the single content of the inevitable impurity elements is less than or equal to 0.05%, and the total content of the impurity elements is less than or equal to 0.15%. The production method sequentially comprises the following steps: (1) According to the composition and mass percentage of the aluminum profile, selecting an aluminum ingot with the purity of 99.7 percent, a magnesium ingot with the purity of 99.8 percent, an aluminum-silicon alloy, an aluminum-copper alloy, an aluminum-manganese alloy and an aluminum-chromium alloy as raw materials for proportioning; (2) Adding the raw materials into a heat accumulating type gas aluminum melting furnace, heating and melting the raw materials into aluminum alloy liquid at 730 ℃, then starting a permanent magnetic stirring device, and stirring the aluminum alloy liquid for 20 by adopting a circulation mode of forward rotation for 5 minutes and then reverse rotation for 5 minutes; (3) Blowing and refining aluminum alloy liquid in an aluminum melting furnace for 20 minutes by using argon with the purity of 99.99 percent and a refining agent accounting for 0.3 percent of the total weight of the raw materials, slagging off and standing for 50 minutes, wherein the refining agent comprises the following components in percentage by mass: mgCl 2 35.2%，KCl 35.8%，KBF 4 5.3%，K 2 ZrF 6 8.9%，SrCO 3 7.1%，LiCl 4.4%，BaCl 2 3.3 percent, and the refining agent is obtained by remelting: drying and dehydrating the refining agent, heating for 1.6 hours at 950 ℃ in a vacuum furnace with the vacuum degree of 18 Pa, cooling, solidifying, crushing and screening to obtain the refining agent with the particle size of less than or equal to 2 mm; (4) Introducing the aluminum alloy liquid into a launder, and then adding an Al5Ti1B alloy rod accounting for 0.5 percent of the total weight of the raw materials for online grain refinement treatment; (5) Enabling the aluminum alloy liquid to sequentially flow through a degassing box which is arranged on a launder and has a graphite rotor rotating speed of 580 revolutions per minute, a gas flow rate of 1.9 cubic meters per hour and a gas pressure of 0.38MPa and a filter box which is provided with two foamed ceramic filter plates of the front 50 meshes and the rear 80 meshes to carry out online degassing and filtering treatment, wherein the gas is a mixed gas consisting of argon with the purity of 99.99 percent and chlorine with the purity of 99.99 percent, and the volume percentage of the chlorine is 4 percent; (6) Semi-continuously casting aluminum alloy liquid into aluminum under the conditions that the temperature is 690 ℃ and the casting speed is 170 mm/minAn alloy round bar; (7) Heating the aluminum alloy round bar to 595 ℃, and preserving heat for 11 hours to carry out homogenization treatment; (8) Heating an aluminum alloy round bar to 530 ℃, extruding the aluminum alloy round bar into an aluminum profile under the conditions that the on-machine temperature of a die is 495 ℃ and the pushing speed of an extrusion rod is 30 mm/s, and then spraying water mist to cool the aluminum profile to room temperature; (9) And stretching and straightening the aluminum profile, heating to 215 ℃, preserving heat for 2.5 hours, performing aging treatment, and cooling to obtain the high-strength aluminum profile for the solar photovoltaic bracket.
Verification example 1:
the hydrogen content and slag content of the aluminum alloy liquid before the semi-continuous casting of examples 1 to 4 were measured on site by an HDA-V hydrogen meter and an Analyze PoDFA slag meter, and the results are shown in Table 1. As can be seen from Table 1, the aluminum alloy liquids of examples 1 to 4 had a hydrogen content of less than 0.12 ml/100gAl and a slag content of less than 0.09 mm 2 In terms of/kg. The hydrogen content of the aluminum alloy liquid before the semi-continuous casting is usually higher than 0.17 ml/100gAl and the slag content is higher than 0.15 mm under the condition that the adding amount of the refining agent is the same by adopting the existing refining agent to blow and refine the aluminum alloy liquid in the furnace 2 (iv) kg. The refining agent has higher efficiency of degassing and impurity removal, can obviously reduce the content of gas slag in the aluminum alloy liquid, is beneficial to reducing the deformation resistance of the aluminum alloy round bar, and improves the extrusion speed of the aluminum alloy round bar, and the mechanical property and the corrosion resistance of the aluminum alloy round bar.
TABLE 1 examples 1-4 hydrogen and slag contents of aluminum alloy liquids
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Hydrogen content/(ml/100 gAl) | 0.113 | 0.104 | 0.117 | 0.106 |
| Slag content/(mm) 2 /kg) | 0.087 | 0.084 | 0.089 | 0.085 |
Verification example 2:
samples were taken from the aluminum profiles of examples 1 to 4, and after grinding, polishing and etching, the grain structure on the cross section of the aluminum profile was observed under an optical microscope, fig. 1 is the grain structure on the cross section of the aluminum profile of example 1, fig. 2 is the grain structure on the cross section of the aluminum profile of example 2, fig. 3 is the grain structure on the cross section of the aluminum profile of example 3, and fig. 4 is the grain structure on the cross section of the aluminum profile of example 4. As can be seen from fig. 1-4, the aluminum profiles are fine uniform equiaxed grain structures in cross section. The invention can prevent the growth of recrystallized grains of the extruded aluminum alloy by scientifically designing the composition and the extrusion production process of the aluminum alloy, obtain the aluminum profile with fine and uniform grains, and is beneficial to improving the strength, the plasticity and the corrosion resistance of the aluminum profile.
Verification example 3:
samples were taken from the aluminum profiles of examples 1 to 4, processed into standard tensile specimens, and then subjected to room-temperature stretching in an electronic tensile testing machine at a stretching rate of 2mm/min, and the tensile strength, yield strength and elongation after fracture of the aluminum profiles were measured, and the results are shown in Table 2. The results of the brinell hardness test using a brinell hardness tester are shown in table 2. As can be seen from Table 2, the tensile strength of the aluminum profiles of examples 1-4 is not less than 310 MPa, the yield strength is not less than 290 MPa, the elongation after fracture is not less than 13%, and the Vickers hardness is not less than 16. The tensile strength of the 6005A aluminum profile for the solar photovoltaic bracket is usually lower than 280 MPa, the yield strength is lower than 260 MPa, the elongation after fracture is lower than 10%, and the Vickers hardness is lower than 15. As can be seen by comparison, the strength of the aluminum profile is improved by 10%, the plasticity is improved by more than 30%, and the aluminum profile has higher strength and plasticity and meets the requirements of a solar photovoltaic bracket on high-strength aluminum profiles.
Table 2 mechanical properties of the aluminium profiles of examples 1 to 4
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Tensile strength/MPa | 316.9 | 311.8 | 326.4 | 321.5 |
| Yield strength/MPa | 297.2 | 293.5 | 295.7 | 292.3 |
| Elongation after break/% | 13.9 | 14.1 | 13.2 | 13.6 |
| Wechsler hardness HB | 16.3 | 16.1 | 16.8 | 16.5 |
While the present invention has been described by way of examples, and not by way of limitation, other variations of the disclosed embodiments, as would be readily apparent to one of skill in the art, are intended to be within the scope of the present invention, as defined by the claims.
Claims (10)
1. The high-strength aluminum profile for the solar photovoltaic bracket is characterized by comprising the following components in percentage by mass: 0.66 to 0.72 percent of Si, 0.62 to 0.68 percent of Mg, 0.05 to 0.15 percent of Cu, 0.05 to 0.15 percent of Mn, 0.05 to 0.15 percent of Cr, 0.02 to 0.03 percent of Ti, 0.004 to 0.006 percent of B, less than or equal to 0.2 percent of Fe, the balance of Al and inevitable impurity elements, wherein the single content of the inevitable impurity elements is less than or equal to 0.05 percent, and the total content of the impurity elements is less than or equal to 0.15 percent.
2. The high-strength aluminum profile for the solar photovoltaic bracket according to claim 1, wherein the Si and Mg are in a mass percentage of: si is more than or equal to Mg/1.73+0.3, and the sum of the mass percentages of Mn and Cr satisfies: mn + Cr is less than or equal to 0.2 percent.
3. A production method of a high-strength aluminum profile for a solar photovoltaic bracket, which is used for producing the high-strength aluminum profile for the solar photovoltaic bracket as claimed in claims 1-2, is characterized by sequentially comprising the following steps:
(1) According to the composition and mass percentage of the aluminum profile, selecting an aluminum source, a silicon source, a magnesium source, a copper source, a manganese source and a chromium source as raw materials for proportioning;
(2) Adding the raw materials into a heat accumulating type gas aluminum melting furnace, heating and melting the raw materials into aluminum alloy liquid at 720-760 ℃, and then starting a permanent magnetic stirring device to stir the aluminum alloy liquid in the furnace;
(3) Blowing, refining, degassing and removing impurities of aluminum alloy liquid in an aluminum melting furnace by using inert gas and a refining agent, slagging off and then standing for a period of time;
(4) Introducing the aluminum alloy liquid into a launder, and then adding Al5Ti1B alloy rods accounting for 0.4-0.6% of the total weight of the raw materials for online grain refinement treatment;
(5) Enabling the aluminum alloy liquid to sequentially flow through a degassing box and a filtering box which are arranged on a launder to carry out online degassing and filtering treatment;
(6) Semi-continuously casting the aluminum alloy liquid into an aluminum alloy round bar under the conditions that the temperature is 680-720 ℃ and the casting speed is 100-200 mm/min;
(7) Heating the aluminum alloy round bar to 590-600 ℃, and preserving heat for 10-12 hours to carry out homogenization treatment;
(8) Heating an aluminum alloy round bar at 520-540 ℃, extruding the aluminum alloy round bar into an aluminum profile, and then spraying water mist to cool the aluminum profile to room temperature;
(9) And stretching and straightening the aluminum profile, then heating to 210-220 ℃, preserving heat for 2-3 hours, carrying out aging treatment, and cooling to obtain the high-strength aluminum profile for the solar photovoltaic bracket.
4. The method for producing the high-strength aluminum profile for the solar photovoltaic bracket as claimed in claim 3, wherein in the step (1), the aluminum source is an aluminum ingot with a purity of not less than 99.7%, the magnesium source is a magnesium ingot with a purity of not less than 99.8%, the silicon source is an aluminum-silicon alloy, the copper source is an aluminum-copper alloy, the manganese source is an aluminum-manganese alloy, and the chromium source is an aluminum-chromium alloy.
5. The method for producing the high-strength aluminum profile for the solar photovoltaic bracket according to claim 3, wherein the step (2) of starting the permanent magnetic stirring device to stir the aluminum alloy liquid in the furnace is to stir the aluminum alloy liquid for 15 to 25 minutes in a circulation mode of forward rotation for 5 minutes and then reverse rotation for 5 minutes.
6. The production method of the high-strength aluminum profile for the solar photovoltaic bracket as claimed in claim 3, wherein the inert gas in the step (3) is argon with the purity of more than or equal to 99.99%, the amount of the refining agent accounts for 0.2-0.4% of the total weight of the raw materials, the blowing refining time is 15-25 minutes, and the standing time is 30-60 minutes.
7. The production method of the high-strength aluminum profile for the solar photovoltaic bracket according to claim 3, wherein the refining agent in the step (3) comprises the following components in percentage by mass: mgCl 2 30-45%，KCl 25-40%，KBF 4 5-10%，K 2 ZrF 6 5-10%，SrCO 3 6-8%，LiCl 3-5%，BaCl 2 2-4%。
8. The production method of the high-strength aluminum profile for the solar photovoltaic bracket according to claim 3 or 7, characterized in that the refining agent is obtained by remelting, specifically, the refining agent is remelted at 900-1100 ℃ in a vacuum furnace with a vacuum degree of 10-20Pa, and is crushed and screened after being cooled and solidified to obtain the refining agent with the particle size of less than or equal to 2 mm.
9. The method for producing the high-strength aluminum profile for the solar photovoltaic bracket according to claim 3, wherein in the step (5), the rotation speed of a graphite rotor in the degassing tank is 500-600 rpm, the gas flow is 1.5-2.5 cubic meters per hour, the gas pressure is 0.35-0.45MPa, the gas is a mixed gas consisting of argon with the purity of not less than 99.99% and chlorine with the purity of not less than 99.99%, the volume percentage of the chlorine is 1-5%, and two foamed ceramic filter plates with the first 50 meshes and the second 80 meshes are arranged in the filter tank.
10. The method for producing the high-strength aluminum profile for the solar photovoltaic bracket according to claim 3, wherein the die temperature for extrusion in the step (8) is 480 to 500 ℃, and the extrusion rod advancing speed is 25 to 35 mm/s.
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| CN109055786A (en) * | 2018-08-29 | 2018-12-21 | 营口忠旺铝业有限公司 | A kind of production technology of 6 line aluminium alloy casting rod |
| CN110669964A (en) * | 2019-10-31 | 2020-01-10 | 辽宁忠旺集团有限公司 | High-performance rare earth Al-Mg-Si aluminum alloy extrusion material and preparation method thereof |
| CN111996423A (en) * | 2020-07-10 | 2020-11-27 | 中信渤海铝业控股有限公司 | Aluminum alloy profile for solar photovoltaic frame and preparation method thereof |
| CN113073239A (en) * | 2021-03-24 | 2021-07-06 | 瑞旭实业有限公司 | Solar photovoltaic frame support aluminum alloy material and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055786A (en) * | 2018-08-29 | 2018-12-21 | 营口忠旺铝业有限公司 | A kind of production technology of 6 line aluminium alloy casting rod |
| CN110669964A (en) * | 2019-10-31 | 2020-01-10 | 辽宁忠旺集团有限公司 | High-performance rare earth Al-Mg-Si aluminum alloy extrusion material and preparation method thereof |
| CN111996423A (en) * | 2020-07-10 | 2020-11-27 | 中信渤海铝业控股有限公司 | Aluminum alloy profile for solar photovoltaic frame and preparation method thereof |
| CN113073239A (en) * | 2021-03-24 | 2021-07-06 | 瑞旭实业有限公司 | Solar photovoltaic frame support aluminum alloy material and manufacturing method thereof |
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