CN114350993B - Production process of high-strength aluminum alloy applied to bicycle frame - Google Patents
Production process of high-strength aluminum alloy applied to bicycle frame Download PDFInfo
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 238000007670 refining Methods 0.000 claims abstract description 19
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- 230000003075 superhydrophobic effect Effects 0.000 claims abstract description 17
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- 229910052751 metal Inorganic materials 0.000 claims description 26
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 14
- 229910021641 deionized water Inorganic materials 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
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- 238000005406 washing Methods 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 229910021419 crystalline silicon Inorganic materials 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- NLSXASIDNWDYMI-UHFFFAOYSA-N triphenylsilanol Chemical compound C=1C=CC=CC=1[Si](C=1C=CC=CC=1)(O)C1=CC=CC=C1 NLSXASIDNWDYMI-UHFFFAOYSA-N 0.000 claims description 8
- QIJRTFXNRTXDIP-UHFFFAOYSA-N (1-carboxy-2-sulfanylethyl)azanium;chloride;hydrate Chemical compound O.Cl.SCC(N)C(O)=O QIJRTFXNRTXDIP-UHFFFAOYSA-N 0.000 claims description 7
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 claims description 7
- 229960001305 cysteine hydrochloride Drugs 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
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- 238000007664 blowing Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
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- 238000005530 etching Methods 0.000 claims description 4
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
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- 229910001082 7005 aluminium alloy Inorganic materials 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- 230000000694 effects Effects 0.000 description 1
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Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention relates to a production process of a high-strength aluminum alloy applied to a bicycle frame, belonging to the technical field of alloy material preparation, and comprising the following steps of: transferring the electrolytic aluminum liquid into a smelting furnace, adding Mg, si, cu and Mn, and heating and melting; adding a ceramic composite material; adding an aluminum alloy refining agent; discharging and pouring to obtain a cast rod blank, and performing hot extrusion molding and heat treatment on the cast rod blank to obtain an aluminum alloy pipe; and dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe. In the technical scheme of the invention, tiB is prepared 2 And CeB 6 Introduction of nanoparticles into an aluminium alloy melt, tiB 2 And CeB 6 The nano particles have the potential of being used as nuclei, increase the nucleation rate during crystallization and solidification, and play a role in refining aluminum alloy grains, so that the hardness of the generated aluminum alloy is increased, the elongation and the fatigue resistance are greatly enhanced, and the safety standard of the European Union for bicycle frames can be met.
Description
Technical Field
The invention belongs to the technical field of alloy material preparation, and particularly relates to a production process of a high-strength aluminum alloy applied to a bicycle frame.
Background
At present, the most applied frame aluminum alloy material is 6061 alloy, and the 6061 aluminum alloy is a material with better comprehensive properties such as corrosion resistance, strength, weldability, heat treatment manufacturability and the like. 7005 alloy is also used to make bicycle frame, its strength is higher than 6061, and it will be aged at room temperature, which can improve its performance to some extent. However, cold forming, welding and heat treatment of this 7005 aluminum alloy are difficult. 7075 it is super hard aluminum, widely used in aviation industry, but it is difficult to weld, has poor corrosion resistance (it will turn white), and is used in high strength non-welded parts, and is less used in making bicycle frames. Along with the development of society, the outstanding resource and environment problems and the improvement of the requirements of people on bicycles.
Chinese patent 201210061326.6 discloses a method for manufacturing a frame by using 6066 alloy, the strength of the manufactured frame can reach 250MPa after T4 and T6 heat treatment, the elongation is more than 8%, but the manufactured frame still can not stably pass the european standard bicycle safety standard, the pedal force fatigue test is only 2 ten thousand times (5 ten thousand times for urban cars are qualified, 10 ten thousand times for mountain cars and racing cars are qualified); in the prior art, it is proved that the metal nano-particles and the ceramic material can refine the crystal grains of the aluminum alloy, thereby greatly enhancing the strength of the aluminum alloy; however, metal and ceramic materials are difficult to disperse in an aluminum melt due to poor wettability in the aluminum alloy, so that the prepared aluminum alloy has insufficient properties and cannot stably pass the standards of European Union for bicycle frames; in addition, the surface of the existing aluminum alloy frame is often prevented from being corroded by painting, and although the corrosion of the surface of the aluminum alloy can be prevented, most paint has the problem of environmental pollution.
Disclosure of Invention
The invention aims to provide a production process of high-strength aluminum alloy applied to a bicycle frame, which is characterized in that modified TiB is prepared by triphenylsilanol 2 Nanoparticles and improved CeB 6 The nano particles are connected to enhance the dispersion performance of the composite ceramic material in the aluminum melt; the aluminum alloy surface is etched to form a coarse structure, and then the organic carbon dots are dip-coated, so that the probability of corrosion of the aluminum alloy surface is reduced.
The technical problems to be solved by the invention are as follows: the existing aluminum alloy material applied to bicycle workshops is insufficient in fatigue resistance and strength, and the problem of environmental pollution exists in the coating for preventing the aluminum alloy surface from being corroded.
The purpose of the invention can be realized by the following technical scheme:
a production process of high-strength aluminum alloy applied to a bicycle frame comprises the following steps:
s1, heating an electrolytic aluminum ingot to 720-780 ℃ to obtain electrolytic aluminum liquid, transferring the electrolytic aluminum liquid into a smelting furnace, adding metal Mg, crystalline silicon Si, metal Cu and metal Mn, heating, melting and uniformly stirring to obtain an alloy melt;
s2, controlling the temperature of the alloy melt within the range of 730-750 ℃, adding the ceramic composite material into the alloy melt, and stirring and mixing uniformly;
s3, controlling the temperature to 720-740 ℃, uniformly blowing the aluminum alloy refining agent along with nitrogen into the furnace bottom through a steel pipe, stirring and refining for 10-30min, removing floating slag, and standing for 1h;
s4, discharging and pouring to obtain a cast rod blank, and performing hot extrusion molding and heat treatment on the cast rod blank to obtain an aluminum alloy pipe;
s5, dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe to obtain the high-strength aluminum alloy applied to the bicycle frame.
Further, in step S1, the mass ratio of the electrolytic aluminum ingot, the metal Mg, the crystalline silicon Si, the metal Cu and the metal Mn is 90 to 95:1-1.5:1.2-1.7:0.8-1.2:0.5-1.
Further, in step S2, the addition amount of the ceramic composite material is 1.5% of the mass of the alloy melt, and the ceramic composite material is prepared by the following steps:
firstly, under ultrasonic treatment, 2-2.5g of TiB 2 Nanoparticles and 2-2.4g CeB 6 Respectively immersing the nano particles into 45-50mL of acetone, filtering, drying, placing in a muffle furnace for oxidation, naturally cooling to room temperature, washing with deionized water, and drying to respectively obtain modified TiB 2 Nanoparticles and modified CeB 6 Nanoparticles;
step two, uniformly mixing 1.4-2mL of triphenyl silanol and 25-30mL of ethanol water solution to obtain a uniform solution;
thirdly, modifying TiB 2 Nanoparticles and modificationsCeB 6 Dispersing the nano particles in the uniform solution, stirring and reacting for 1-2h, filtering, washing and drying to obtain the ceramic composite material.
Further, in step S3, the adding amount of the aluminum alloy refining agent is 1-2% of the mass of the alloy melt, and the aluminum alloy refining agent is composed of NaCl, KCl and Na 2 SiF 6 And Na 2 SO 4 The material is prepared by mixing the following components in a mass ratio of 3.
Further, in step S4, the hot extrusion molding process parameters are specifically: before extrusion, the blank and the extrusion die are respectively preheated to 480 ℃ and 450 ℃, and the speed of an extrusion rod is controlled to be 2-3mm/s.
Further, in step S4, the heat treatment process parameters specifically include: solution treatment is carried out for 1h at 550 ℃, and aging treatment is carried out for 3h at 200 ℃.
Further, the aluminum alloy pipe surface dip-coating super-hydrophobic coating comprises the following steps:
a1, dissolving citric acid and cysteine hydrochloride in deionized water, heating at 70 ℃ for 12h, heating to 100 ℃ in a nitrogen atmosphere, adding dicyclohexylcarbodiimide, heating to 180 ℃, reacting for 40min, filtering to obtain solid powder, dispersing the obtained solid powder in dichloromethane, and purifying by a dialysis membrane to obtain organic carbon dot powder;
a2, using HCl solution and H with the volume ratio of 1 2 O 2 Etching the mixed solution for 15min, washing with deionized water, drying to obtain an etched aluminum alloy pipe, dispersing organic carbon dot powder in ethanol to obtain a uniform solution, soaking the etched aluminum alloy pipe in the uniform solution for 3h, taking out, and drying at room temperature to obtain the super-hydrophobic aluminum alloy coating.
Further, in the step A1, the dosage ratio of the citric acid, the cysteine hydrochloride, the deionized water and the dicyclohexylcarbodiimide is 0.3-0.5:0.2-0.4:18-25:0.1-0.3.
The invention has the beneficial effects that:
in the technical scheme of the invention, the triphenyl silanol is a cage-shaped structure with a plurality of silanol (Si-OH) functional groups, and TiB is treated by 2 Nanoparticles and CeB 6 Nano meterThe particles are oxidized and then react with the triphenyl silanol to realize the grafting of the surface of the non-oxide ceramic and the triphenyl silanol, thereby realizing the TiB 2 And CeB 6 To carry out chemical ligation, already known as TiB 2 Is a fresh ceramic material with strong wettability in aluminium alloy melt, and is prepared by mixing TiB 2 And CeB 6 The two are combined to promote CeB 6 Dispersancy in aluminium melts, tiB 2 And CeB 6 The nano particles are uniformly dispersed in the aluminum alloy molten mass due to TiB 2 And CeB 6 All having a lattice constant similar to that of Al, tiB 2 And CeB 6 The nano particles have the potential of being used as nuclei, so that the nucleation rate during crystallization and solidification is increased, and the effect of refining aluminum alloy grains is achieved; the hardness of the produced aluminum alloy is increased, the elongation and the fatigue resistance are greatly enhanced, and the aluminum alloy can pass the safety standard of European Union for bicycle frames.
According to the technical scheme, the green and environment-friendly carbon dots are synthesized by a solid phase method by using anhydrous cysteine hydrochloride and citric acid as carbon sources and dicyclohexylcarbodiimide as a dehydrating agent, a rough structure is firstly formed on the surface of the aluminum alloy by using chemical etching of hydrochloric acid and hydrogen peroxide, then hydroxyl radicals are grafted, and the carbon dots soaked in ethanol are connected through the interaction of the hydroxyl radicals, so that the carbon dots with low surface energy are fixed on the rough structure of the aluminum alloy, a super-hydrophobic structure is formed, and the probability of frame corrosion can be obviously improved when the super-hydrophobic aluminum alloy material is applied to a bicycle frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The ceramic composite material is prepared by the following steps:
firstly, 2g of TiB is treated under ultrasound 2 Nanoparticles and 2g CeB 6 Respectively immersing the nano particles into 45mL of acetone, filtering, drying, placing in a muffle furnace for oxidation, naturally cooling to room temperature, washing with deionized water, and drying to respectively obtain modified TiB 2 Nanoparticles and modified CeB 6 Nanoparticles;
step two, uniformly mixing 1.4mL of triphenyl silanol with 25mL of ethanol water solution to obtain a uniform solution;
thirdly, modifying TiB 2 Nanoparticles and modified CeB 6 Dispersing the nano particles in the uniform solution, stirring for reaction for 1h, filtering, washing and drying to obtain the ceramic composite material.
Example 2
The ceramic composite material is prepared by the following steps:
first, 2.5g of TiB is treated under ultrasound 2 Nanoparticles and 2.4g CeB 6 Respectively soaking the nano particles into 50mL of acetone, filtering, drying, placing the nano particles in a muffle furnace for oxidation, naturally cooling to room temperature, washing with deionized water, and drying to respectively obtain modified TiB 2 Nanoparticles and modified CeB 6 Nanoparticles;
step two, uniformly mixing 2mL of triphenyl silanol and 30mL of ethanol water solution to obtain a uniform solution;
thirdly, modifying TiB 2 Nanoparticles and modified CeB 6 Dispersing the nano particles in the uniform solution, stirring and reacting for 2 hours, filtering, washing and drying to obtain the ceramic composite material.
Example 3
A production process of high-strength aluminum alloy applied to a bicycle frame comprises the following steps:
s1, heating 90 kg of electrolytic aluminum ingot to 720 ℃ to obtain electrolytic aluminum liquid, transferring the electrolytic aluminum liquid into a smelting furnace, adding 1kg of metal Mg, 1kg of crystalline silicon Si, 0.8 kg of metal Cu and 0.5kg of metal Mn, heating, melting and uniformly stirring to obtain an alloy melt;
s2, controlling the temperature of the alloy melt within the range of 730 ℃, adding the ceramic composite material prepared in the embodiment 1 with the mass of the alloy melt being 1.5% into the alloy melt, and stirring and mixing uniformly;
s3, controlling the temperature to 720 ℃, uniformly blowing the aluminum alloy refining agent along with nitrogen into the furnace bottom through a steel pipe, stirring and refining for 10min, removing floating slag, and standing for 1h;
s4, discharging and pouring to obtain a cast rod blank, carrying out hot extrusion molding on the cast rod blank, respectively preheating the blank and an extrusion die to 480 ℃ and 450 ℃ before extrusion, and controlling the speed of an extrusion rod to be 2mm/S; carrying out solution treatment on the hot-extrusion molded crude product at 550 ℃ for 1h, and carrying out aging treatment at 200 ℃ for 3h to obtain an aluminum alloy pipe;
and S5, dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe to obtain the high-strength aluminum alloy applied to the bicycle frame.
Example 4
A production process of high-strength aluminum alloy applied to a bicycle frame comprises the following steps:
s1, heating 95 kg of electrolytic aluminum ingot to 780 ℃ to obtain electrolytic aluminum liquid, transferring the electrolytic aluminum liquid into a smelting furnace, adding 1.5 kg of metal Mg, 1.7 kg of crystalline silicon Si, 1.2 kg of metal Cu and 1kg of metal Mn, heating, melting and uniformly stirring to obtain an alloy melt;
s2, controlling the temperature of the alloy melt within the range of 750 ℃, adding the ceramic composite material prepared in the embodiment 2 with the mass of the alloy melt being 1.5% into the alloy melt, and stirring and mixing uniformly;
s3, controlling the temperature to 740 ℃, uniformly blowing the aluminum alloy refining agent along with nitrogen into the furnace bottom through a steel pipe, stirring and refining for 30min, removing floating slag, and standing for 1h;
s4, discharging and pouring to obtain a cast rod blank, carrying out hot extrusion molding on the cast rod blank, respectively preheating the blank and an extrusion die to 480 ℃ and 450 ℃ before extrusion, and controlling the speed of an extrusion rod to be 3mm/S; carrying out solution treatment on the hot-extrusion molded crude product at 550 ℃ for 1h, and carrying out aging treatment at 200 ℃ for 3h to obtain an aluminum alloy pipe;
s5, dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe to obtain the high-strength aluminum alloy applied to the bicycle frame.
Example 5
The aluminum alloy pipe surface dip-coating super-hydrophobic coating comprises the following steps:
a1, dissolving 0.3g of citric acid and 0.2g of cysteine hydrochloride in 18g of deionized water, heating at 70 ℃ for 12h, heating to 100 ℃ in a nitrogen atmosphere, then adding 0.1g of dicyclohexylcarbodiimide, heating to 180 ℃, reacting for 40min, filtering to obtain solid powder, dispersing the obtained solid powder in dichloromethane, and purifying through a dialysis membrane to obtain organic carbon dot powder;
a2, using 3L of HCl solution with the volume ratio of 1 2 O 2 Etching the mixed solution for 15min, washing with deionized water, drying to obtain an etched aluminum alloy pipe, dispersing 5g of organic carbon dot powder in 0.5kg of ethanol to obtain a uniform solution, immersing the etched aluminum alloy pipe in the uniform solution for 3h, taking out, and drying at room temperature to obtain the super-hydrophobic aluminum alloy coating.
Example 6
The aluminum alloy pipe surface dip-coating super-hydrophobic coating comprises the following steps:
a1, dissolving 0.5g of citric acid and 0.4g of cysteine hydrochloride in 25g of deionized water, heating at 70 ℃ for 12h, heating to 100 ℃ under a nitrogen atmosphere, then adding 0.3g of dicyclohexylcarbodiimide, heating to 180 ℃, reacting for 40min, filtering to obtain solid powder, dispersing the obtained solid powder in dichloromethane, and purifying through a dialysis membrane to obtain organic carbon dot powder;
a2, using 5L of HCl solution with the volume ratio of 1 to H for 2 kg of aluminum alloy pipe 2 O 2 Etching the mixed solution for 15min, washing with deionized water, drying to obtain an etched aluminum alloy pipe, dispersing 8g of organic carbon dot powder in 1kg of ethanol to obtain a uniform solution, immersing the etched aluminum alloy pipe in the uniform solution for 3h, taking out, and drying at room temperature to obtain the super-hydrophobic aluminum alloy coating.
Comparative example 1
A production process of high-strength aluminum alloy applied to a bicycle frame comprises the following steps:
s1, heating 90 kg of electrolytic aluminum ingot to 720 ℃ to obtain electrolytic aluminum liquid, transferring the electrolytic aluminum liquid into a smelting furnace, adding 1kg of metal Mg, 1kg of crystalline silicon Si, 0.8 kg of metal Cu and 0.5kg of metal Mn, heating, melting and uniformly stirring to obtain an alloy melt;
s2, controlling the temperature of the alloy melt within 730 ℃, and enabling the alloy melt to be 1.5% of the ceramic composite material (TiB) in mass 2 And CeB 6 Adding the alloy into the alloy melt according to the mass ratio of 1);
s3, controlling the temperature to 720 ℃, uniformly blowing the aluminum alloy refining agent along with nitrogen into the furnace bottom through a steel pipe, stirring and refining for 10min, removing floating slag, and standing for 1h;
s4, discharging and pouring to obtain a cast rod blank, carrying out hot extrusion molding on the cast rod blank, respectively preheating the blank and an extrusion die to 480 ℃ and 450 ℃ before extrusion, and controlling the speed of an extrusion rod to be 2mm/S; carrying out solution treatment on the hot-extrusion molded crude product at 550 ℃ for 1h, and carrying out aging treatment at 200 ℃ for 3h to obtain an aluminum alloy pipe;
s5, dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe to obtain the high-strength aluminum alloy applied to the bicycle frame.
Comparative example 2
A production process of high-strength aluminum alloy applied to a bicycle frame comprises the following steps:
s1, heating 95 kg of electrolytic aluminum ingot to 780 ℃ to obtain electrolytic aluminum liquid, transferring the electrolytic aluminum liquid into a smelting furnace, adding 1.5 kg of metal Mg, 1.7 kg of crystalline silicon Si, 1.2 kg of metal Cu and 1kg of metal Mn, heating, melting and uniformly stirring to obtain an alloy melt;
s2, controlling the temperature of the alloy melt within the range of 750 ℃, and enabling the ceramic composite material (TiB) with the mass of the alloy melt to be 1.5 percent 2 And CeB 6 Adding the alloy melt into the alloy melt according to the mass ratio of 1);
s3, controlling the temperature to 740 ℃, uniformly blowing the aluminum alloy refining agent into the furnace bottom along with nitrogen through a steel pipe, stirring and refining for 30min, removing floating slag, and standing for 1h;
s4, discharging and pouring to obtain a cast rod blank, carrying out hot extrusion molding on the cast rod blank, respectively preheating the blank and an extrusion die to 480 ℃ and 450 ℃ before extrusion, and controlling the speed of an extrusion rod to be 3mm/S; carrying out solution treatment on the crude product after hot extrusion molding at 550 ℃ for 1h, and carrying out aging treatment at 200 ℃ for 3h to obtain an aluminum alloy pipe;
s5, dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe to obtain the high-strength aluminum alloy applied to the bicycle frame.
Comparative example 3
Step S5 in embodiment 3 is omitted and the remaining steps are the same.
Comparative example 4
Step S5 in embodiment 4 is omitted, and the remaining steps are the same.
The high strength aluminum alloys prepared in examples 3-4 and comparative examples 1-4 were now tested for performance according to EN1706:1998, the mechanical properties of the high strength aluminum alloy are tested, and the test results are shown in table 1 below:
TABLE 1
As can be seen from table 1 above, compared with the comparative example, the high-strength aluminum alloy prepared in the embodiment of the present invention can significantly increase the mechanical properties of the aluminum alloy by adding the ceramic composite material.
Water contact angle measurements were now made for examples 5-6 and comparative examples 3-4, using a 3. Mu.L drop on a Kruss DSA30S contact angle system.
And (3) testing the corrosion resistance: the aluminum alloy is taken as a working electrode, a metal platinum electrode is taken as a counter electrode, a saturated calomel electrode is taken as a comparison electrode, the aluminum alloy is immersed in NaC l aqueous solution with solute mass fraction of 3.5%, a CS350H electrochemical workstation is used for testing, and the test results are shown in the following table 2:
TABLE 2
As can be seen from table 2 above, the high strength aluminum alloys prepared in the examples of the present invention have stronger hydrophobic properties and corrosion resistance than the comparative examples.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (1)
1. The production process of the high-strength aluminum alloy applied to the bicycle frame is characterized by comprising the following steps of: the method comprises the following steps:
s1, heating an electrolytic aluminum ingot to 720-780 ℃ to obtain electrolytic aluminum liquid, transferring the electrolytic aluminum liquid into a smelting furnace, adding metal Mg, crystalline silicon Si, metal Cu and metal Mn, heating, melting and uniformly stirring to obtain an alloy melt;
s2, controlling the temperature of the alloy melt within the range of 730-750 ℃, adding the ceramic composite material into the alloy melt, and stirring and mixing uniformly;
s3, controlling the temperature to 720-740 ℃, uniformly blowing the aluminum alloy refining agent into the furnace bottom along with nitrogen, stirring and refining for 10-30min, removing floating slag, and standing for 1h;
s4, discharging and pouring to obtain a cast rod blank, and performing hot extrusion molding and heat treatment on the cast rod blank to obtain an aluminum alloy pipe;
s5, dip-coating a super-hydrophobic coating on the surface of the aluminum alloy pipe to obtain high-strength aluminum alloy applied to the bicycle frame;
in the step S1, the mass ratio of the electrolytic aluminum ingot to the metal Mg to the crystalline silicon Si to the metal Cu to the metal Mn is 90-95:1-1.5:1.2-1.7:0.8-1.2:0.5 to 1;
in the step S2, the addition amount of the ceramic composite material is 1.5% of the mass of the alloy melt, and the ceramic composite material is prepared by the following steps:
first, tiB is treated under ultrasound 2 Nanoparticles and CeB 6 Respectively immersing the nano particles in acetone, filtering, drying, oxidizing in a muffle furnace, naturally cooling to room temperature, washing with deionized water, and drying to obtain modified TiB 2 Nanoparticles and modified CeB 6 Nanoparticles;
step two, uniformly mixing triphenyl silanol and ethanol water solution to obtain a uniform solution;
thirdly, modifying TiB 2 Nanoparticles and modified CeB 6 Dispersing the nano particles in the uniform solution, stirring and reacting for 1-2h, filtering, washing and drying to obtain the ceramic composite material;
in step S3, the adding amount of the aluminum alloy refining agent is 1-2% of the mass of the alloy melt, and the aluminum alloy refining agent is composed of NaCl, KCl and Na 2 SiF 6 And Na 2 SO 4 The raw materials are mixed according to the mass ratio of 3;
in step S4, the hot extrusion molding process parameters are specifically: preheating the blank and an extrusion die to 480 ℃ and 450 ℃ respectively before extrusion, and controlling the speed of an extrusion rod to be 2-3mm/s;
in step S4, the heat treatment process parameters are specifically: carrying out solution treatment for 1h at 550 ℃, and carrying out aging treatment for 3h at 200 ℃;
the method for dip-coating the super-hydrophobic coating on the surface of the aluminum alloy pipe comprises the following steps:
a1, dissolving citric acid and cysteine hydrochloride in deionized water, heating at 70 ℃ for 12 hours, heating to 100 ℃ in a nitrogen atmosphere, adding dicyclohexylcarbodiimide, heating to 180 ℃, reacting for 40min, filtering to obtain solid powder, dispersing the obtained solid powder in dichloromethane, and purifying through a dialysis membrane to obtain organic carbon dot powder;
a2, using HCl solution and H with the volume ratio of 1 2 O 2 Etching the mixed solution for 15min, washing with deionized water, drying to obtain an etched aluminum alloy pipe, dispersing organic carbon dot powder in ethanol to obtain a uniform solution, soaking the etched aluminum alloy pipe in the uniform solution for 3h, taking out, and drying at room temperature to obtain a super-hydrophobic aluminum alloy coating;
in the step A1, the dosage ratio of the citric acid, the cysteine hydrochloride, the deionized water and the dicyclohexylcarbodiimide is 0.3-0.5:0.2-0.4:18-25:0.1-0.3.
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Address after: 242000 No. 12, Guohua Road, Guangde Economic Development Zone, Xuancheng City, Anhui Province Patentee after: Anhui Kelante Aluminum Industry Co.,Ltd. Address before: 242000 Guangde Economic Development Zone, Xuancheng, Anhui Patentee before: ANHUI LANT ALUMINUM Co.,Ltd. |
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Denomination of invention: A high-strength aluminum alloy production process applied to bicycle frames Effective date of registration: 20231211 Granted publication date: 20230407 Pledgee: Industrial and Commercial Bank of China Limited Guangde sub branch Pledgor: Anhui Kelante Aluminum Industry Co.,Ltd. Registration number: Y2023980070468 |