CN114369746A - High-temperature aluminum alloy for floor heating pipe and production process thereof - Google Patents
High-temperature aluminum alloy for floor heating pipe and production process thereof Download PDFInfo
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- CN114369746A CN114369746A CN202111665091.7A CN202111665091A CN114369746A CN 114369746 A CN114369746 A CN 114369746A CN 202111665091 A CN202111665091 A CN 202111665091A CN 114369746 A CN114369746 A CN 114369746A
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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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
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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
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper 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
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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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
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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
- C22F1/043—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 silicon as the next major constituent
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- 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
- C22F1/057—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 copper as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
Abstract
The invention relates to a high-temperature aluminum alloy for a floor heating pipe and a production process thereof, belonging to the technical field of aluminum alloys. The high-temperature aluminum alloy comprises an aluminum alloy tube substrate and a corrosion-resistant coating; the aluminum alloy pipe matrix comprises the following raw materials: si, Fe, Cu, Mg, B, Bi, Ti, Sc, Ni, Zr, Nb, Mo and Al; the corrosion-resistant coating comprises the following raw materials: color paste, methyl trimethoxy siloxane and formic acid; the color paste comprises the following raw materials: silica sol, modified graphene, aluminum oxide, a dispersing agent and deionized water. The surface of the aluminum alloy pipe matrix is treated by the corrosion-resistant coating, so that the corrosion resistance and the heat resistance of the aluminum alloy pipe matrix are improved; and modified graphene is introduced to modify the coating, so that the heat dissipation of the organic silicon ceramic coating is improved. The aluminum alloy for the floor heating pipe, which is obtained by the invention, has good strength, hardness and toughness, and also has good corrosion resistance and high temperature resistance.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy, and particularly relates to a high-temperature aluminum alloy for a floor heating pipe and a production process thereof.
Background
In chilly winter, in order to improve the travelling comfort of living in residence, people can install heating installation at home, and along with the development of science and technology, more and more novel heating mode appears in people's the field of vision, and warm up with water is exactly one of them, warm up with water is the hot water that the temperature is not higher than 60 ℃ as the heat medium, the heating tube internal circulation that is buried in the below ground filling layer flows, heat whole floor, through ground with the heat transfer mode of radiation and convection current to the heating mode of indoor heat supply. The existing floor heating pipe is made of crosslinked polyethylene, aluminum-plastic composite plastic, impact-resistant co-polypropylene, random co-polypropylene, aluminum alloy and the like, wherein the materials such as the crosslinked polyethylene, the aluminum-plastic composite plastic, the impact-resistant co-polypropylene, the random co-polypropylene and the like belong to plastic pipes, and the heat conductivity coefficient and the durability of the pipes are lower than those of aluminum alloy pipes. During the installation of the aluminum alloy pipe for floor heating, the aluminum alloy pipe is inevitably cut and installed, so that the aluminum alloy pipe is required to have excellent characteristic of easy cutting.
However, the conventional free-cutting alloys have a problem that the workpiece is easily broken under heavy cutting conditions such as high-speed cutting. This problem is caused by embrittlement of the alloy due to heat generation of the workpiece by the cutting work and the high temperature of, for example, 135 ℃. Further, there is a fear that brittle fracture may occur also when a product formed by cutting work is used at high temperature. To solve this problem, chinese patent CN101278065B discloses a free-cutting aluminum alloy extrusion material with excellent high temperature brittleness resistance, which contains 3-6 wt% of Cu and 0.9-3 wt% of Bi, with the balance being Al and inevitable impurities, and has excellent high temperature brittleness resistance. But the strength of the aluminum alloy pipe needs to be improved. In addition, in the use process of the aluminum alloy ground heating pipe, an oxide film formed on the surface of the aluminum alloy ground heating pipe is easy to damage, so that the aluminum alloy ground heating pipe is easy to oxidize by oxygen in the air to cause corrosion, and finally loses the high temperature resistance characteristic, thereby greatly reducing the service life of the aluminum alloy ground heating pipe.
Therefore, the invention provides a high-temperature aluminum alloy for a floor heating pipe and a production process thereof.
Disclosure of Invention
The invention aims to provide a high-temperature aluminum alloy for a floor heating pipe and a production process thereof, and aims to solve the problems of low high-temperature brittleness and low corrosion resistance of the conventional high-temperature aluminum alloy for the floor heating pipe.
The purpose of the invention can be realized by the following technical scheme:
a high-temperature aluminum alloy for a floor heating pipe comprises an aluminum alloy pipe base body and a corrosion-resistant coating.
Further, the aluminum alloy pipe base body comprises the following raw materials in percentage by mass: 2.3 to 6.45 percent of Si, 0.3 to 0.5 percent of Fe, 1.3 to 2.4 percent of Cu, 0.65 to 1.3 percent of Mg, 0.2 to 0.62 percent of B, 1.2 to 3.65 percent of Bi, 0.03 to 0.65 percent of Ti, 0.08 to 0.15 percent of Sc, 0.05 to 0.55 percent of Ni, 0.08 to 0.19 percent of Zr, 0.08 to 0.12 percent of Nb, 0.05 to 0.08 percent of Mo and the balance of Al.
Further, the corrosion-resistant coating comprises the following raw materials in parts by weight: 65-75 parts of color paste, 23-33 parts of methyltrimethoxy siloxane and 1-2 parts of formic acid.
Further, the color paste comprises the following raw materials in parts by weight: 40-50 parts of silica sol, 30-35 parts of modified graphene, 7-12 parts of aluminum oxide, 1-2 parts of dispersing agent and 10-30 parts of deionized water. The color paste is prepared by the following steps: and (3) uniformly mixing the raw materials of the color paste, grinding for 1-1.5h on a basket grinder at the speed of 1200r/min, and filtering by using 300-mesh filter cloth.
Further, the modified graphene is prepared by the following steps:
adding graphene oxide into THF, performing ultrasonic dispersion for 15-20min, then adding dicarboxyl end-capped polysilsesquioxane and aminopropyltriethoxysilane, heating to 50-60 ℃, stirring for reaction for 6h, stopping the reaction, cooling, performing rotary evaporation, washing with ethanol for multiple times, and drying to obtain modified graphene, wherein the mass ratio of the graphene oxide to the THF to the dicarboxyl end-capped polysilsesquioxane to the aminopropyltriethoxysilane is 20-35: 100: 7-18: 3-8.
Further, the biscarboxyl-terminated polysilsesquioxane is prepared by the steps of:
mixing octaphenyl polysilsesquioxane sodium salt, triethylamine and anhydrous tetrahydrofuran under the protection of nitrogen, stirring for 1h at 0 ℃ in an ice bath, then dropwise adding a tetrahydrofuran solution of methyldichlorosilane at the dropping speed of 1 drop/second, reacting for 4h at 0 ℃, heating to room temperature, reacting for 20h, filtering after the reaction is finished, separating through a column after the filtrate is dried by spinning (the volume ratio of dichloromethane to petroleum ether is 1: 2), and drying in vacuum to constant weight to obtain hydrogen-containing polysilsesquioxane, wherein the molar ratio of octaphenyl polysilsesquioxane sodium salt, triethylamine to dimethylchlorosilane is 1: 2-2.5: 2.3-2.5;
and secondly, mixing hydrogen-containing polysilsesquioxane and anhydrous tetrahydrofuran, adding chloroplatinic acid, dropwise adding a tetrahydrofuran solution of acrylic acid at a dropping speed of 1 drop/second, reacting at 75 ℃ for 18 hours, performing rotary evaporation, and performing vacuum drying to constant weight to obtain the dicarboxyl end-capped polysilsesquioxane, wherein the molar ratio of the hydrogen-containing polysilsesquioxane to the acrylic acid is 1: 2.1-2.3, wherein the mass of the chloroplatinic acid is 8-15% of that of the acrylic acid.
A production process of a high-temperature aluminum alloy for a floor heating pipe comprises the following steps:
placing raw materials in a weighed aluminum alloy tube substrate inside a material frame, and then removing impurities through an ultrasonic cleaning device to remove dust on the surface;
step two, putting preheated Al, Si, Fe, Cu and Mg into a furnace, refining at 850-;
step three, heating the cooled aluminum-based raw material to 850-; casting the molten liquid in a mold, rapidly cooling to 300 ℃, and then preserving heat for 6 hours at 350 ℃ to obtain an aluminum alloy pipe blank;
step four, sending the cooled aluminum alloy tube blank into an extruder, raising the temperature for homogenization treatment, then performing extrusion, quenching and aging heat treatment to obtain a molded aluminum alloy tube matrix, wherein the homogenization treatment temperature is 550-600 ℃, the heat preservation time is 7.5h, the extrusion temperature of the die is 410-420 ℃, the temperature of the die is 480-490 ℃ during extrusion, the extrusion speed is 3-3.5m/min, and the extrusion ratio is 65: 1, taking out the formed aluminum alloy pipe within 5 seconds at the water inlet temperature of 500 ℃ and the cooling speed of 78 ℃/s during quenching; the aging temperature is 160-;
and step five, stirring and mixing the raw materials of the corrosion-resistant coating, stirring for 8 hours at the temperature of 20-30 ℃, filtering, spraying the mixture on the surface of the pretreated molded aluminum alloy tube substrate, drying and curing to obtain the high-temperature aluminum alloy for the floor heating tube, wherein the drying temperature is 100 ℃, the drying time is 10 minutes, the curing temperature is 250 ℃, and the curing time is 10 minutes.
Furthermore, the addition amount of the impurity removing agent in the second step is 2-3% of the total mass of Al, Si, Fe, Cu and Mg.
Further, the impurity removing agent in the second step is a mixture of sodium chloride, potassium chloride and cryolite, and preferably, the mass ratio of the sodium chloride to the potassium chloride to the cryolite is 4: 4: 1.
further, the concrete operation of the pre-treated formed aluminum alloy pipe base body in the fifth step is to carry out sand blasting treatment on the formed aluminum alloy pipe base body, so that the surface of the aluminum alloy pipe base body obtains certain cleanliness and different roughness, wherein the aluminum alloy pipe base body is made of white corundum sand with the size of 80 meshes, and the roughness of the base body after sand blasting is 3 microns.
The invention has the beneficial effects that:
according to the invention, by adding Fe, Cu and Mg elements into the Al-based material, the dislocation density and recrystallization temperature of the aluminum alloy tube matrix are improved by utilizing the three elements to form a dispersed strengthening phase (such as Al2Cu and Al2CuMg) with Al, recrystallization is inhibited, and the tensile strength, yield strength, hardness and toughness of the aluminum alloy tube matrix are improved; meanwhile, partial Mg and Si form aging precipitates which are beneficial to strength improvement in crystal interior together, and the aging hardening capacity is exerted, so that the tensile strength, the impact resistance, the bending fatigue resistance and the heat resistance of the aluminum alloy pipe matrix are improved; the strength and the high-temperature resistance of the aluminum alloy can be effectively changed by adding elements such as B, Bi, Ti, Sc, Ni, Zr, Nb, Mo and the like, wherein the function of B in the alloy is mainly to cause local alloying due to grain boundary segregation, the state of the grain boundary is obviously changed, and the diffusion process of the elements on the grain boundary is reduced to strengthen the grain boundary; bi. Ti, Ni, Zr, Nb and Mo not only can refine grains, but also can form dispersed Al3M type strengthening phase, and the recrystallization temperature of the matrix is increased; in addition, Sc element has strong chemical activity, can form a compound with good thermal stability, is distributed in a radial shape at a crystal boundary, can effectively strengthen the crystal boundary, and improves the high-temperature resistance of the alloy; therefore, the aluminum alloy pipe matrix obtained by the invention has good strength, hardness and toughness;
in the refining process, an impurity removing agent is added, so that impurities in the molten liquid can be removed, the impurities are prevented from influencing the growth and distribution of a strengthening phase, and the refining effect of the alloy is improved; the size and distribution of the precipitation of the strengthening phase are improved through homogenization treatment in the heat treatment, and the toughness and the corrosion resistance of the aluminum alloy pipe matrix are improved; the surface of the aluminum alloy tube substrate is treated by using the corrosion-resistant coating, the corrosion-resistant coating is an organic silicon ceramic coating, and a coating film taking silicon-oxygen bonds as units is formed on the surface of the aluminum alloy tube substrate by using the organic silicon ceramic coating, so that the corrosion resistance and the heat resistance of the aluminum alloy tube substrate are improved; the modified graphene and the aluminum oxide are introduced to modify the coating, wherein the graphene is uniformly distributed in the coating to form a good heat conducting network and improve the heat dissipation performance of the organic silicon ceramic coating, the modified graphene is prepared by mixing and reacting graphene oxide, dicarboxyl-terminated polysilsesquioxane and aminopropyltriethoxysilane, the nano size and the low surface energy of the dicarboxyl-terminated polysilsesquioxane are easily introduced into the interlayer of the graphene oxide and react with functional groups (hydroxyl and carboxyl) on the surface of the graphene oxide, the aminopropyltriethoxysilane can also react with epoxy groups on the surface of the graphene oxide, the dispersion degree of the graphene oxide in silica sol is improved, in the subsequent film forming process, siloxane grafted on the surface of the modified graphene can be hydrolyzed and is connected into the coating, on one hand, the graphene is used as a filler, the mechanical property of the coating is improved, on the other hand, the graphene is uniformly distributed in the coating, and a layer of heat-conducting net is formed by utilizing the good heat-conducting property of the graphene, so that the heat-conducting and heat-dissipating capacity of the coating is improved;
in conclusion, the aluminum alloy for the floor heating pipe, which is obtained by the invention, has good strength, hardness and toughness, and also has good corrosion resistance and high temperature resistance.
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
Preparation of sodium salt of octaphenyl polysilsesquioxane:
0.13mol of phenyltrimethoxysilane, 2mg of deionized water and 0.1mol of flaky sodium hydroxide are added into 150mL of isopropanol and continuously stirred, then the mixture is heated to 75 ℃, and after the mixture reacts for 8 hours in the nitrogen atmosphere, the mixture is stirred and reacts for 18 hours at normal temperature, the isopropanol is removed from the obtained mixed solution through rotary evaporation, and the mixed solution is dried for 12 hours in vacuum at 65 ℃, so that octaphenyl polysilsesquioxane sodium salt is obtained.
Example 2
Preparation of dicarboxy-terminated polysilsesquioxane:
mixing 0.1mol of octaphenyl polysilsesquioxane sodium salt prepared in example 1, 0.2mol of triethylamine and 100mL of anhydrous tetrahydrofuran under the protection of nitrogen, stirring for 1h at 0 ℃ in an ice bath, then dropwise adding 70mL of tetrahydrofuran solution containing 0.23mol of methyl dichlorosilane, dropwise adding at the speed of 1 drop/second, reacting for 4h at 0 ℃, heating to room temperature for reacting for 20h, filtering after the reaction is finished, spin-drying the filtrate, performing column separation (the volume ratio of dichloromethane to petroleum ether is 1: 2), and performing vacuum drying to constant weight to obtain hydrogen-containing polysilsesquioxane;
and secondly, mixing 0.1mol of hydrogen-containing polysilsesquioxane and 100mL of anhydrous tetrahydrofuran, adding chloroplatinic acid, dropwise adding 60mL of tetrahydrofuran solution containing 0.23mol of acrylic acid at the dropping speed of 1 drop/second, reacting at 75 ℃ for 18 hours, performing rotary evaporation, and performing vacuum drying to constant weight to obtain the dicarboxyl end-capped polysilsesquioxane, wherein the mass of the chloroplatinic acid is 8 percent of that of the acrylic acid.
Example 3
Preparation of dicarboxy-terminated polysilsesquioxane:
mixing 0.1mol of octaphenyl polysilsesquioxane sodium salt prepared in example 1, 0.24mol of triethylamine and 100mL of anhydrous tetrahydrofuran under the protection of nitrogen, stirring for 1h at 0 ℃ in an ice bath, then dropwise adding 70mL of tetrahydrofuran solution containing 0.25mol of methyl dichlorosilane, dropwise adding at the speed of 1 drop/second, reacting for 4h at 0 ℃, heating to room temperature for reacting for 20h, filtering after the reaction is finished, spin-drying the filtrate, performing column separation (the volume ratio of dichloromethane to petroleum ether is 1: 2), and performing vacuum drying to constant weight to obtain hydrogen-containing polysilsesquioxane;
and secondly, mixing 0.1mol of hydrogen-containing polysilsesquioxane and 100mL of anhydrous tetrahydrofuran, adding chloroplatinic acid, dropwise adding 60mL of tetrahydrofuran solution containing 0.23mol of acrylic acid at the dropping speed of 1 drop/second, reacting for 18h at 75 ℃, performing rotary evaporation, and performing vacuum drying to constant weight to obtain the dicarboxyl end-capped polysilsesquioxane, wherein the mass of the chloroplatinic acid is 15% of that of the acrylic acid.
Example 4
Preparing modified graphene:
adding 20g of graphene oxide into 100g of THF, performing ultrasonic dispersion for 15min, then adding 7g of the dicarboxyl-terminated polysilsesquioxane prepared in the embodiment 2 and 3g of aminopropyltriethoxysilane, heating to 50 ℃, stirring for reaction for 6h, stopping the reaction, cooling, performing rotary evaporation, washing with ethanol for multiple times, and drying to obtain the modified graphene.
Example 5
Preparing modified graphene:
adding 35g of graphene oxide into 100g of THF, performing ultrasonic dispersion for 20min, then adding 18g of the dicarboxyl-terminated polysilsesquioxane prepared in the embodiment 3 and 8g of aminopropyltriethoxysilane, heating to 60 ℃, stirring for reaction for 6h, stopping the reaction, cooling, performing rotary evaporation, washing with ethanol for multiple times, and drying to obtain the modified graphene.
Example 6
Preparing color paste:
the preparation method comprises the following raw materials in parts by weight: 40 parts of silica sol, 30 parts of the modified graphene prepared in example 4, 7 parts of aluminum oxide, 1 part of a dispersant and 10 parts of deionized water; then, the raw materials are uniformly mixed, ground for 1h on a basket grinder at the speed of 1200r/min, and filtered by 300-mesh filter cloth, thus obtaining the product. Wherein the silica sol is alkaline silica sol with the pH value of 9-10, the mass fraction of SiO2 is 50%, and the dispersant is BYK-161.
Example 7
Preparing color paste:
the preparation method comprises the following raw materials in parts by weight: 50 parts of silica sol, 35 parts of the modified graphene prepared in example 4, 12 parts of aluminum oxide, 2 parts of a dispersing agent and 30 parts of deionized water; then, the raw materials are uniformly mixed, ground for 1.5h on a basket grinder at the speed of 1200r/min, and filtered by 300-mesh filter cloth, thus obtaining the product. Wherein the silica sol is alkaline silica sol with the pH value of 9-10, and the mass fraction of SiO2 is 50%.
Example 8
A production process of a high-temperature aluminum alloy for a floor heating pipe comprises the following steps:
step one, raw material preparation: aluminum alloy tube base body: preparing the following raw materials in percentage by mass: 2.3% of Si, 0.35% of Fe, 1.33% of Cu, 0.65% of Mg, 0.3% of B, 1.4% of Bi, 0.03% of Ti, 0.08% of Sc, 0.05% of Ni, 0.11% of Zr, 0.08% of Nb, 0.08% of Mo and the balance of Al;
and (3) corrosion-resistant coating: the preparation method comprises the following raw materials in parts by weight: 65 parts of the color paste prepared in example 6, 23 parts of methyltrimethoxysiloxane and 1 part of formic acid;
placing the weighed raw materials in the aluminum alloy tube substrate inside a material frame, and then removing impurities through an ultrasonic cleaning device to remove dust on the surface;
step three, putting preheated Al, Si, Fe, Cu and Mg into a furnace, refining at 850 ℃ until all raw materials are molten liquid, putting an impurity removing agent into the furnace, continuing refining for 6 hours, stirring the materials in the furnace, removing residues floating on the upper part of the molten liquid, standing and cooling to 100 ℃ to obtain a cooled aluminum-based raw material, wherein the preheating temperature is 100 ℃, the addition amount of the impurity removing agent is 2% of the total mass of Al, Si, Fe, Cu and Mg, and the impurity removing agent is sodium chloride, potassium chloride and cryolite according to the mass ratio of 4: 4: 1, mixing;
step four, heating the cooled aluminum-based raw material to 850 ℃, carrying out secondary refining, removing residues floating on the upper part of the molten liquid, adding preheated B into the furnace after the residues are removed, heating for 2 hours, adding the rest raw materials, heating and stirring for 2 hours to obtain molten liquid; casting the molten liquid in a mold, rapidly cooling to 300 ℃, and then preserving heat for 6 hours at 350 ℃ to obtain an aluminum alloy pipe blank;
and step five, feeding the cooled aluminum alloy pipe blank into an extruder, heating to perform homogenization treatment, then performing extrusion, quenching and aging heat treatment to obtain a formed aluminum alloy pipe matrix, wherein the homogenization treatment temperature is 550 ℃, the heat preservation time is 7.5 hours, the extrusion temperature of a die is 410 ℃, the temperature of the die during extrusion is 480 ℃, the extrusion speed is 3m/min, and the extrusion ratio is 65: 1, taking out the formed aluminum alloy pipe within 5 seconds at the water inlet temperature of 500 ℃ and the cooling speed of 78 ℃/s during quenching; the aging temperature is 160 ℃, the heat preservation time is 10h, and the temperature rising speed is 2 ℃/min;
and sixthly, stirring and mixing the raw materials of the corrosion-resistant coating, stirring for 8 hours at the temperature of 20 ℃, filtering, spraying the mixture on the surface of a pretreated molded aluminum alloy pipe substrate, drying and curing to obtain the high-temperature aluminum alloy for the floor heating pipe, wherein the drying temperature is 100 ℃, the drying time is 10min, the curing temperature is 250 ℃, the curing time is 10min, and the specific operation of the pretreated molded aluminum alloy pipe substrate is used for carrying out sand blasting treatment on the molded aluminum alloy pipe substrate to ensure that the surface of the aluminum alloy pipe substrate obtains certain cleanliness and different roughness, wherein the material is white corundum sand with the size of 80 meshes, and the roughness of the substrate is 3 mu m after the sand blasting is carried out.
Example 9
A production process of a high-temperature aluminum alloy for a floor heating pipe comprises the following steps:
step one, raw material preparation: aluminum alloy tube base body: preparing the following raw materials in percentage by mass: 4.25% of Si, 0.3% of Fe, 1.5% of Cu, 0.65% of Mg, 0.62% of B, 1.2% of Bi, 0.25% of Ti, 0.12% of Sc, 0.35% of Ni, 0.08% of Zr, 0.10% of Nb, 0.08% of Mo and the balance of Al;
and (3) corrosion-resistant coating: the preparation method comprises the following raw materials in parts by weight: 70 parts of the color paste prepared in example 7, 27 parts of methyltrimethoxysiloxane and 1.5 parts of formic acid;
placing the weighed raw materials in the aluminum alloy tube substrate inside a material frame, and then removing impurities through an ultrasonic cleaning device to remove dust on the surface;
step three, putting preheated Al, Si, Fe, Cu and Mg into a furnace, refining at 950 ℃ until all raw materials are molten liquid, putting an impurity removing agent into the furnace, continuing refining for 6 hours, stirring the materials in the furnace, removing residues floating on the upper part of the molten liquid, standing and cooling to 150 ℃ to obtain a cooled aluminum-based raw material, wherein the preheating temperature is 120 ℃, the adding amount of the impurity removing agent is 3% of the total mass of Al, Si, Fe, Cu and Mg, and the impurity removing agent is sodium chloride, potassium chloride and cryolite according to the mass ratio of 4: 4: 1, mixing;
step four, heating the cooled aluminum-based raw material to 950 ℃, carrying out secondary refining, removing residues floating on the upper part of the molten liquid, adding preheated B into the furnace after the residues are removed, heating for 3 hours, adding the rest raw materials, heating and stirring for 3 hours to obtain molten liquid; casting the molten liquid in a mold, rapidly cooling to 300 ℃, and then preserving heat for 6 hours at 350 ℃ to obtain an aluminum alloy pipe blank;
and step five, feeding the cooled aluminum alloy pipe blank into an extruder, heating to perform homogenization treatment, then performing extrusion, quenching and aging heat treatment to obtain a formed aluminum alloy pipe matrix, wherein the homogenization treatment temperature is 600 ℃, the heat preservation time is 7.5 hours, the extrusion temperature of a die is 420 ℃, the temperature of the die is 490 ℃ during extrusion, the extrusion speed is 3.5m/min, and the extrusion ratio is 65: 1, taking out the formed aluminum alloy pipe within 5 seconds at the water inlet temperature of 500 ℃ and the cooling speed of 78 ℃/s during quenching; the aging temperature is 170 ℃, the heat preservation time is 10h, and the temperature rising speed is 2 ℃/min;
and sixthly, stirring and mixing the raw materials of the corrosion-resistant coating, stirring for 8 hours at the temperature of 30 ℃, filtering, spraying the mixture on the surface of a pretreated molded aluminum alloy pipe substrate, drying and curing to obtain the high-temperature aluminum alloy for the floor heating pipe, wherein the drying temperature is 100 ℃, the drying time is 10min, the curing temperature is 250 ℃, the curing time is 10min, and the specific operation of the pretreated molded aluminum alloy pipe substrate is used for carrying out sand blasting treatment on the molded aluminum alloy pipe substrate to ensure that the surface of the aluminum alloy pipe substrate obtains certain cleanliness and different roughness, wherein the material is white corundum sand with the size of 80 meshes, and the roughness of the substrate is 3 mu m after the sand blasting is carried out.
Example 10
A production process of a high-temperature aluminum alloy for a floor heating pipe comprises the following steps:
step one, raw material preparation: aluminum alloy tube base body: preparing the following raw materials in percentage by mass: 6.45% of Si, 0.3% of Fe, 1.3% of Cu, 0.8% of Mg, 0.34% of B, 3.65% of Bi, 0.65% of Ti, 0.15% of Sc, 0.45% of Ni, 0.08% of Zr, 0.08% of Nb, 0.05% of Mo and the balance of Al.
And (3) corrosion-resistant coating: the preparation method comprises the following raw materials in parts by weight: 75 parts of the color paste prepared in example 6, 33 parts of methyltrimethoxysiloxane and 2 parts of formic acid;
placing the weighed raw materials in the aluminum alloy tube substrate inside a material frame, and then removing impurities through an ultrasonic cleaning device to remove dust on the surface;
step three, putting preheated Al, Si, Fe, Cu and Mg into a furnace, refining at 900 ℃ until all raw materials are molten liquid, putting an impurity removing agent into the furnace, continuing refining for 6 hours, stirring the materials in the furnace, removing residues floating on the upper part of the molten liquid, standing and cooling to 160 ℃ to obtain a cooled aluminum-based raw material, wherein the preheating temperature is 130 ℃, the addition amount of the impurity removing agent is 2-3% of the total mass of Al, Si, Fe, Cu and Mg, the impurity removing agent is a mixture of sodium chloride, potassium chloride and cryolite, and preferably, the mass ratio of the sodium chloride to the potassium chloride to the cryolite is 4: 4: 1;
step four, heating the cooled aluminum-based raw material to 900 ℃, carrying out secondary refining, removing residues floating on the upper part of the molten liquid, adding preheated B into the furnace after the residues are removed, heating for 2-3h, adding the rest raw materials, and heating and stirring for 2-3h to obtain the molten liquid; casting the molten liquid in a mold, rapidly cooling to 300 ℃, and then preserving heat for 6 hours at 350 ℃ to obtain an aluminum alloy pipe blank;
and step five, feeding the cooled aluminum alloy pipe blank into an extruder, heating to perform homogenization treatment, then performing extrusion, quenching and aging heat treatment to obtain a formed aluminum alloy pipe matrix, wherein the homogenization treatment temperature is 550 ℃, the heat preservation time is 7.5 hours, the extrusion temperature of a die is 410 ℃, the temperature of the die during extrusion is 480 ℃, the extrusion speed is 3m/min, and the extrusion ratio is 65: 1, taking out the formed aluminum alloy pipe within 5 seconds at the water inlet temperature of 500 ℃ and the cooling speed of 78 ℃/s during quenching; the aging temperature is 160 ℃, the heat preservation time is 10h, and the temperature rising speed is 2 ℃/min;
and sixthly, stirring and mixing the raw materials of the corrosion-resistant coating, stirring for 8 hours at the temperature of 30 ℃, filtering, spraying the mixture on the surface of a pretreated molded aluminum alloy pipe substrate, drying and curing to obtain the high-temperature aluminum alloy for the floor heating pipe, wherein the drying temperature is 100 ℃, the drying time is 10min, the curing temperature is 250 ℃, the curing time is 10min, and the specific operation of the pretreated molded aluminum alloy pipe substrate is used for carrying out sand blasting treatment on the molded aluminum alloy pipe substrate to ensure that the surface of the aluminum alloy pipe substrate obtains certain cleanliness and different roughness, wherein the material is white corundum sand with the size of 80 meshes, and the roughness of the substrate is 3 mu m after the sand blasting is carried out.
Example 11
A production process of a high-temperature aluminum alloy for a floor heating pipe comprises the following steps:
step one, raw material preparation: aluminum alloy tube base body: preparing the following raw materials in percentage by mass: 4% of Si, 0.5% of Fe, 1.36% of Cu, 1.3% of Mg, 0.62% of B, 3.65% of Bi, 0.65% of Ti, 0.15% of Sc, 0.05% of Ni, 0.19% of Zr, 0.12% of Nb, 0.08% of Mo and the balance of Al.
And (3) corrosion-resistant coating: the preparation method comprises the following raw materials in parts by weight: 65 parts of the colour paste prepared in example 6, 23 parts of methyltrimethoxysiloxane and 1 part of formic acid
Placing the weighed raw materials in the aluminum alloy tube substrate inside a material frame, and then removing impurities through an ultrasonic cleaning device to remove dust on the surface;
step three, the same as the step three of example 8;
step four, the same as the step four of example 8;
step five, the same as the step five of example 8;
step six, the same as step six of example 8.
Comparative example 1
Preparing color paste:
the preparation method comprises the following raw materials in parts by weight: 40 parts of silica sol, 30 parts of graphene, 7 parts of aluminum oxide, 1 part of dispersing agent and 10 parts of deionized water; then, the raw materials are uniformly mixed, ground for 1h on a basket grinder at the speed of 1200r/min, and filtered by 300-mesh filter cloth, thus obtaining the product. Wherein the silica sol is alkaline silica sol with the pH value of 9-10, and the mass fraction of SiO2 is 50%.
Comparative example 2
Preparing color paste:
the preparation method comprises the following raw materials in parts by weight: 40 parts of silica sol, 12 parts of aluminum oxide, 2 parts of dispersing agent and 10 parts of deionized water; then, the raw materials are uniformly mixed, ground for 1h on a basket grinder at the speed of 1200r/min, and filtered by 300-mesh filter cloth, thus obtaining the product. Wherein the silica sol is alkaline silica sol with the pH value of 9-10, and the mass fraction of SiO2 is 50%.
Comparative example 3
A production process of an aluminum alloy comprises the following steps:
step one, raw material preparation: aluminum alloy tube base body: preparing the following raw materials in percentage by mass: 2.3% of Si, 0.35% of Fe, 1.33% of Cu, 0.65% of Mg, 1.4% of Bi, 0.03% of Ti, 0.08% of Sc, 0.05% of Ni, 0.11% of Zr, 0.08% of Nb, 0.08% of Mo and the balance of Al;
and (3) corrosion-resistant coating: the preparation method comprises the following raw materials in parts by weight: 65 parts of the color paste prepared in example 6, 23 parts of methyltrimethoxysiloxane and 1 part of formic acid;
step two, the same as step two of example 8;
step three, the same as the step three of example 8;
step four, the same as the step four of example 8;
step five, the same as the step five of example 8;
step six, the same as step six of example 8.
Comparative example 4
A production process of an aluminum alloy comprises the following steps:
step one, raw material preparation: aluminum alloy tube base body: preparing the following raw materials in percentage by mass: 4.25% of Si, 0.3% of Fe, 1.5% of Cu, 0.65% of Mg, 0.62% of B, 1.2% of Bi, 0.25% of Ti, 0.35% of Ni, 0.08% of Zr, 0.10% of Nb, 0.08% of Mo and the balance of Al;
and (3) corrosion-resistant coating: the preparation method comprises the following raw materials in parts by weight: 65 parts of the color paste prepared in example 6, 23 parts of methyltrimethoxysiloxane and 1 part of formic acid;
step two, the same as step two of example 9;
step three, the same as step three of example 9;
step four, the same as the step four of example 9;
step five, the same as the step five of example 9;
step six, the same as step six of example 9.
Comparative example 5
A production process of an aluminum alloy comprises the following steps:
step one, compared with the step one of the embodiment 10, the color paste of the corrosion-resistant coating is replaced by the color paste prepared in the proportion 1, and the rest is the same;
step two, the same as step two of example 10;
step three, the same as step three of example 10;
step four, the same as the step four of example 10;
step five, the same as the step five of example 10;
step six, the same as step six of example 10.
Comparative example 6
A production process of an aluminum alloy comprises the following steps:
step one, compared with the step one of the embodiment 11, replacing the color paste of the corrosion-resistant coating with the color paste prepared in the proportion 2, and the rest are the same;
step two, the same as step two of example 11;
step three, the same as step three of example 10;
step four, the same as the step four of example 10;
step five, the same as the step five of example 10;
step six, the same as step six of example 10.
Example 12
First, the aluminum alloys obtained in examples 8 to 11 and comparative examples 3 to 4 were subjected to the following tests:
pendulum impact test: according to the GB/T3808 standardTest at 30 deg.C, 60 deg.C, 150 deg.C, 180 deg.C to obtain test impact strength (J/cm)2) The data are shown in table 1;
TABLE 1
| 30℃ | 60℃ | 150℃ | 180℃ | |
| Example 8 | 28.9 | 28.3 | 25.5 | 24.1 |
| Example 9 | 29.4 | 29.0 | 26.6 | 25.5 |
| Example 10 | 30.3 | 29.7 | 27.0 | 25.8 |
| Example 11 | 30.7 | 30.2 | 27.3 | 26.0 |
| Comparative example 3 | 26.5 | 25.6 | 20.1 | 14.3 |
| Comparative example 4 | 27.7 | 26.9 | 22.3 | 15.9 |
From the above data, it can be seen that the aluminum alloy provided by the present invention has good high temperature toughness.
And (3) tensile test: the test was carried out in accordance with the GB/T4438 standard at 400 deg.C, 450 deg.C and 500 deg.C, and a blank set was added to obtain the aluminum alloy tube base obtained in the fifth step of example 11, and the obtained data are shown in Table 2;
TABLE 2
From the above data, it can be seen that the aluminum alloy provided by the present invention has high strength and is resistant to high temperatures.
Secondly, the aluminum alloys obtained in examples 8 to 11 and comparative examples 5 to 6 were subjected to the following tests:
and (3) corrosion resistance test: JIS 2371 salt water spray test was carried out for 200 hours, and the weight loss rate was measured, and the test results are shown in table 3;
TABLE 3
From the above data, it can be seen that the aluminum alloy provided by the present invention has good corrosion resistance.
And (3) testing heat dissipation performance: an external light source infrared lamp is adopted, the power is 150-; the blank group is the temperature difference between the inner surface and the outer surface of the aluminum alloy pipe base body of the same kind, such as the blank group of example 8 is the aluminum alloy pipe base body prepared in the fifth step of example 8, the blank group of example 9 is the aluminum alloy pipe base body prepared in the fifth step of example 9, the blank group of example 10 is the aluminum alloy pipe base body prepared in the fifth step of example 10, and so on;
the test results are shown in table 3.
TABLE 3
From the above data, it can be seen that the corrosion resistant coating provided by the present invention has excellent heat dissipation capability.
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 (8)
1. The utility model provides a high temperature aluminum alloy for ground heating coil which characterized in that: comprises an aluminum alloy tube matrix and a corrosion-resistant coating; the aluminum alloy pipe matrix comprises the following raw materials: si, Fe, Cu, Mg, B, Bi, Ti, Sc, Ni, Zr, Nb, Mo and Al; the corrosion-resistant coating comprises the following raw materials: color paste, methyl trimethoxy siloxane and formic acid; the color paste comprises the following raw materials: silica sol, modified graphene, aluminum oxide, a dispersing agent and deionized water;
the modified graphene is prepared by the following steps:
adding graphene oxide into THF, performing ultrasonic dispersion for 15-20min, adding dicarboxyl-terminated polysilsesquioxane and aminopropyltriethoxysilane, heating to 50-60 ℃, stirring for reaction for 6h, stopping the reaction, cooling, performing rotary evaporation, washing with ethanol, and drying to obtain the modified graphene.
2. The high-temperature aluminum alloy for floor heating pipes as set forth in claim 1, wherein: the aluminum alloy pipe matrix comprises the following raw materials in percentage by mass: 2.3 to 6.45 percent of Si, 0.3 to 0.5 percent of Fe, 1.3 to 2.4 percent of Cu, 0.65 to 1.3 percent of Mg, 0.2 to 0.62 percent of B, 1.2 to 3.65 percent of Bi, 0.03 to 0.65 percent of Ti, 0.08 to 0.15 percent of Sc, 0.05 to 0.55 percent of Ni, 0.08 to 0.19 percent of Zr, 0.08 to 0.12 percent of Nb, 0.05 to 0.08 percent of Mo and the balance of Al.
3. The high-temperature aluminum alloy for floor heating pipes as set forth in claim 1, wherein: the mass ratio of the graphene oxide to the THF to the double-carboxyl-terminated polysilsesquioxane to the aminopropyltriethoxysilane is 20-35: 100: 7-18: 3-8.
4. The production process of the high-temperature aluminum alloy for the floor heating pipe, as recited in claim 1, is characterized in that: the method comprises the following steps:
firstly, removing impurities from raw materials of an aluminum alloy pipe substrate through an ultrasonic cleaning device;
step two, putting preheated Al, Si, Fe, Cu and Mg into a furnace, refining at 850-;
step three, heating the cooled aluminum-based raw material to 850-; casting the molten liquid in a mold, cooling to 300 ℃, and then preserving heat for 6 hours at 350 ℃ to obtain an aluminum alloy pipe blank;
step four, sending the cooled aluminum alloy pipe blank into an extruder, heating for homogenization treatment, and then performing extrusion, quenching and aging heat treatment to obtain a molded aluminum alloy pipe matrix;
and step five, stirring and mixing the raw materials of the corrosion-resistant coating, stirring for 8 hours at the temperature of 20-30 ℃, filtering, spraying the mixture on the surface of the pretreated molded aluminum alloy tube substrate, drying and curing to obtain the high-temperature aluminum alloy for the floor heating tube.
5. The production process of the high-temperature aluminum alloy for the floor heating pipe, as recited in claim 4, wherein: in the second step, the addition amount of the impurity removing agent is 2-3% of the total mass of Al, Si, Fe, Cu and Mg.
6. The production process of the high-temperature aluminum alloy for the floor heating pipe, as recited in claim 4, wherein: the impurity removing agent is sodium chloride, potassium chloride and cryolite according to a mass ratio of 4: 4: 1, mixing the components.
7. The production process of the high-temperature aluminum alloy for the floor heating pipe, as recited in claim 4, wherein: in the fourth step, the homogenization treatment temperature is 550-.
8. The production process of the high-temperature aluminum alloy for the floor heating pipe, as recited in claim 4, wherein: in the fifth step, the drying temperature is 100 ℃, the drying time is 10min, the curing temperature is 250 ℃, and the curing time is 10 min.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000204427A (en) * | 1999-01-11 | 2000-07-25 | Sumitomo Light Metal Ind Ltd | Aluminum alloy clad material for heat exchanger excellent in brazing property and corrosion resistance |
| JP2002348626A (en) * | 2001-05-21 | 2002-12-04 | Ryoka Macs Corp | Aluminum alloy material for die casting |
| CN105177365A (en) * | 2015-08-19 | 2015-12-23 | 合肥市田源精铸有限公司 | Novel aluminum alloy material |
| CN107022704A (en) * | 2017-04-11 | 2017-08-08 | 浙江洋铭工贸有限公司 | A kind of high-strength alloy for die-casting aluminum heating radiator |
| CN107974163A (en) * | 2017-11-21 | 2018-05-01 | 马鞍山天宇船舶制造有限公司 | A kind of preparation method of the composite modified wear-and corrosion-resistant type epoxy coating of nano-particle-hydridization Ludox |
| CN109706335A (en) * | 2019-02-25 | 2019-05-03 | 江苏港缆新材料科技有限公司 | A kind of processing technology of the almag of corrosion resistance |
| CN111635495A (en) * | 2020-06-29 | 2020-09-08 | 刘裕玲 | Cage polysilsesquioxane-graphene modified polystyrene with high thermal conductivity and preparation method thereof |
| CN113150653A (en) * | 2021-06-22 | 2021-07-23 | 南通市通州区同博机械制造有限公司 | High-strength corrosion-resistant aluminum alloy and processing technology thereof |
-
2021
- 2021-12-31 CN CN202111665091.7A patent/CN114369746A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000204427A (en) * | 1999-01-11 | 2000-07-25 | Sumitomo Light Metal Ind Ltd | Aluminum alloy clad material for heat exchanger excellent in brazing property and corrosion resistance |
| JP2002348626A (en) * | 2001-05-21 | 2002-12-04 | Ryoka Macs Corp | Aluminum alloy material for die casting |
| CN105177365A (en) * | 2015-08-19 | 2015-12-23 | 合肥市田源精铸有限公司 | Novel aluminum alloy material |
| CN107022704A (en) * | 2017-04-11 | 2017-08-08 | 浙江洋铭工贸有限公司 | A kind of high-strength alloy for die-casting aluminum heating radiator |
| CN107974163A (en) * | 2017-11-21 | 2018-05-01 | 马鞍山天宇船舶制造有限公司 | A kind of preparation method of the composite modified wear-and corrosion-resistant type epoxy coating of nano-particle-hydridization Ludox |
| CN109706335A (en) * | 2019-02-25 | 2019-05-03 | 江苏港缆新材料科技有限公司 | A kind of processing technology of the almag of corrosion resistance |
| CN111635495A (en) * | 2020-06-29 | 2020-09-08 | 刘裕玲 | Cage polysilsesquioxane-graphene modified polystyrene with high thermal conductivity and preparation method thereof |
| CN113150653A (en) * | 2021-06-22 | 2021-07-23 | 南通市通州区同博机械制造有限公司 | High-strength corrosion-resistant aluminum alloy and processing technology thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王宁国: "金属型重力铸造条件下的铝合金铸件生产技术", 《装备制造技术》 * |
| 罗启全: "《铝合金熔炼与铸造》", 30 September 2002, 广东科技出版社 * |
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