CN114559009B - Wear-resistant aluminum alloy shell for high-voltage GIS and processing technology thereof - Google Patents

Wear-resistant aluminum alloy shell for high-voltage GIS and processing technology thereof Download PDF

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CN114559009B
CN114559009B CN202210186400.0A CN202210186400A CN114559009B CN 114559009 B CN114559009 B CN 114559009B CN 202210186400 A CN202210186400 A CN 202210186400A CN 114559009 B CN114559009 B CN 114559009B
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wear
aluminum alloy
glass fiber
amino acid
alloy shell
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CN114559009A (en
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周超
林江
俞鑫
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Yuhuan Dongnan Plastic Electromechanical Co ltd
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Yuhuan Dongnan Plastic Electromechanical Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings
    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • 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
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • 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
    • 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
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • 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
    • 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
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • 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
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • 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
    • C22C21/04—Modified aluminium-silicon alloys
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/045—Details of casing, e.g. gas tightness
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/055—Features relating to the gas
    • 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
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • 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
    • Y02P10/25—Process efficiency

Abstract

The invention provides a wear-resistant aluminum alloy shell for a high-voltage GIS and a processing technology thereof, wherein the wear-resistant aluminum alloy shell for the high-voltage GIS, which has good wear resistance, excellent air tightness and long service life, is prepared by modifying and forging ZAlSi7MgA and adding aluminum-silicon alloy, so that the mass fraction of silicon in a shell body is 8.5-10.5%, and the wear resistance of the shell is improved; rare earth Sc and Al-B refiner are added as modifier to carry out modification treatment, so that the hardness, wear resistance, thermal stability and fatigue resistance of the shell are obviously improved, and a strengthening effect is generated; the wear-resistant layer takes epoxy resin and water-based polyamide imide as basic paint, glass fiber is acidified and then subjected to silanization, then graphene oxide grafting is carried out, the binding force between the glass fiber and the basic paint is improved, and molybdenum disulfide modified by amino acid is introduced to improve the thermal stability of the wear-resistant layer.

Description

Wear-resistant aluminum alloy shell for high-voltage GIS and processing technology thereof
Technical Field
The invention relates to the technical field of high-voltage GIS, in particular to a wear-resistant aluminum alloy shell for a high-voltage GIS and a processing technology thereof.
Background
GIS is the short name of gas-insulated totally enclosed combined electrical apparatus, and GIS's equipment or part are all sealed in the metal casing of ground connection, and the inside is filled with sulfur hexafluoride insulating gas of certain pressure, compares with conventional open-type transformer substation, and GIS has compact structure, area is little, the reliability is high, environmental adaptation ability is strong, maintenance work load is very little scheduling advantage, and its fault rate is only 20-40% of conventional equipment, and extra-high voltage GIS switchgear is the key development project of country.
The existing aluminum alloy shell for the high-voltage GIS adopts most of casting aluminum alloy ZL101A as raw materials, adopts a gravity casting process in a processing process, and has high requirements on air tightness and mechanical properties because the aluminum alloy shell for the high-voltage GIS needs to bear a large load in service.
Although ZL101A aluminum alloy has advantages such as good gas tightness, good casting fluidity, small shrinkage rate, etc., ZL101A aluminum alloy has the problem such as oxidation and pinhole tend to be great in conventional casting process, makes the casing produce main defects such as cold shut, gas pocket, shrinkage cavity, pinhole, slag inclusion, etc. and causes the adverse effect to casing gas tightness, and then leads to the existence of conductive impurity, infiltration of outside moisture, leakage of sulfur hexafluoride gas, insulator ageing, causes GIS internal flashover trouble. Because GIS is full seal structure, the location and maintenance difficulty after the trouble is high, and average outage maintenance time is longer than conventional equipment after the accident, in order to reduce GIS's later maintenance process, extension GIS's life puts forward higher requirement to gas tightness, wearability and the comprehensive mechanical properties of high-pressure GIS with aluminum alloy housing.
Disclosure of Invention
The invention aims to provide a wear-resistant aluminum alloy shell for a high-voltage GIS and a processing technology thereof, so as to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a processing technology of a wear-resistant aluminum alloy shell for a high-voltage GIS comprises the following steps:
s1: taking ZAlSi7MgA as alloy steel, putting the alloy steel into a high-frequency electromagnetic induction smelting furnace for melting, heating to 725 ℃, adding hexachloroethane for heat preservation for 20-25min, then heating to 735-745 ℃, adding an alterant for modification treatment, and preserving heat for 4-7min;
s2: when the temperature of the melt is reduced to 675-685 ℃, transferring the melt into a cold chamber die casting machine for non-vacuum die casting to obtain an ingot;
s3: preserving the heat of the ingot for 12 hours at the temperature of 540-545 ℃, taking out and then cooling in air;
s4: then polishing, cleaning, blow-drying, pre-straightening, peeling, fine straightening and cutting in sequence to obtain an aluminum alloy shell body;
s5: dispersing amino acid modified molybdenum disulfide into N-methylpyrrolidone by ultrasonic, adding TDE-85 epoxy resin, performing ultrasonic treatment at 18-25 ℃ for 1-1.5 hours, removing a solvent, grinding for 3-5 times, adding water-based polyamide imide, modified glass fiber and methyltetrahydrophthalic anhydride, and blending for 10-15 minutes at a speed of 1800-1900r/min in a vacuum environment by using a planetary vacuum mixer to obtain the wear-resistant coating;
s6: and (3) carrying out sand blasting treatment on the surface of the aluminum alloy shell obtained in the step (S4), coating the wear-resistant coating on the surface of the aluminum alloy shell, standing for 20h, preserving heat for 1h at 120 ℃, and then heating to 160 ℃ and preserving heat for 2h to form a wear-resistant layer, thereby obtaining the wear-resistant aluminum alloy shell for the high-voltage GIS.
The aluminum alloy shell for the high-voltage GIS needs higher air tightness and wear resistance to match the development of the high-voltage GIS with increasing speed, and the air tightness and wear resistance of the aluminum alloy shell for the high-voltage GIS are improved by carrying out modified forging on ZAlSi7MgA and coating the wear-resistant coating, so that the service life of the aluminum alloy shell for the high-voltage GIS is prolonged;
according to the invention, alloy steel is put into a high-frequency electromagnetic induction smelting furnace to be melted, hexachloroethane is added to refine a melt, so that the purity of a shell body is improved, an alterant and an aluminum-silicon alloy are added to carry out modification treatment, the silicon content of the body is improved to improve the wear resistance of the shell, and under the condition that the mass fraction of silicon in the shell body is 8.5-10.5%, the problems of larger oxidation and pinhole tendency of the aluminum alloy body in the conventional casting process are solved by adjusting the temperature and the addition amount of the alterant, and the hardness, the wear resistance, the thermal stability and the fatigue resistance of the shell are remarkably improved.
The primary alpha-Al grain size, the eutectic silicon size and the morphology in ZAlSi7MgA have important influence on the performance, and currently, the common modifier of the eutectic silicon mainly comprises Na, sr, sb, rare earth and the like, but the Na is easy to volatilize and burn, so that the modification time is greatly shortened, the quantity of air holes is increased by easily absorbing gas, and smoke can be generated in the modification process to pollute the environment; sr is easy to burn, the aspiration tendency is extremely serious, and the tensile property is seriously affected; sb is a material that reduces the size of silicon, but the deterioration effect has a high requirement on the cooling rate;
aiming at the defects, the invention adopts Al-B and rare earth Sc as modifier, and controls the proportion between the Al-B and the rare earth Sc and the proportion between the Al-B and the shell body to achieve the effects of prolonging modification, refining grains, reducing brittle fracture and improving the comprehensive mechanical properties of the shell body.
Further, in the step S1, the modifier is obtained by compounding an Al-B refiner and rare earth Sc in a mass ratio of 4:3.
The invention selects Al-B to replace Al-5Ti-B because the Al-5Ti-B mainly depends on TiAl released by melting 3 To refine the grains, while the invention uses the silicon content to improve the wear resistance of the shell, tiAl 3 Can react with redundant Si phase to generate Al-Ti-Si ternary intermetallic compound, so that the refining effect has poor stability and has the defect of rapid decay;
in the invention, when the content of rare earth Sc is lower than 0.28%, the primary alpha-Al and eutectic silicon are seriously agglomerated, the cracking effect on a matrix is large, the alloy performance is deteriorated, when the mass fraction of Sc reaches 0.28%, coarse dendrites are thinned, the secondary dendrite spacing is minimum, when the content of Sc exceeds 0.3%, the intermetallic compounds which react with Al and Si to generate AlSiSc are increased, and the intermetallic compounds penetrate into a crystal boundary to promote the co-directional growth net of the eutectic silicon, so that the deterioration effect is poor; the rare earth Sc and the Al-B are added together, so that the effective action time of the modified shell body can be prolonged, because the rare earth Sc improves the wettability of aluminum liquid to boride, the added Al-B refiner is not easy to coagulate and precipitate, the binding force between Si-Si and Si-Al atomic groups is weakened, the alpha-Al phase nucleation supercooling caused by the combination of the A1-A1 atomic groups is enhanced, and the alpha-Al is firstly precipitated and grown as a leading phase in eutectic crystallization, so that the growth of eutectic silicon is limited, and the refining effect on the eutectic silicon is realized;
rare earth Sc cannot enter alpha-Al crystal lattice, but can be biased or adsorbed on solid-liquid interface on crystal boundary, so that the opportunity of dendrite fusing is increased, thereby refining crystal grains, changing the morphology distribution of eutectic Si, and simultaneously, sc is adsorbed in an atomic state on the eutectic during melt solidificationThe growth surface of the crystal Si hinders the growth of Si phase, and the size of eutectic Si is thinned; rare earth Sc forms Al with Al 3 The Sc intermetallic compound, and the alpha-Al lattice are of face-centered cubic structure with a degree of mismatching of less than 2%, act as nucleation cores, thereby refining the grains, and B reacts with Al to form AlB having a face-centered cubic lattice structure 2 The lattice constant of the phase has a good coherent relation with that of alpha-Al, alB 2 Can be used as an effective nucleation substrate of alpha-Al phase to cooperatively refine grains; by adjusting the addition amount of the modifier, the Fe-rich phase remained in the shell is changed from long needle-like shape into granular shape and short rod shape, the end part is round, and the pinhole tendency of the shell is greatly reduced.
By controlling the addition amount of rare earth Sc and Al-B, the modifier has good long-acting property and remelting stability on the modification effect of the shell, can eliminate hydrogen and oxygen gases existing in the shell, greatly reduce the needle hole rate of the shell, greatly reduce the defects of shrinkage porosity, segregation, thermal cracking tendency and the like of the shell, and obviously improve the yield.
Further, the preheating temperature of the die in the step S2 is 180 ℃, and the injection speed is 4.5-6m/S.
The aluminum alloy shell for the high-voltage GIS inevitably faces various corrosion and abrasion problems during service. In order to prolong the service life of the aluminum alloy shell for the high-voltage GIS, the surface of the aluminum alloy shell for the high-voltage GIS is coated with the wear-resistant layer, so that the wear resistance and the air tightness of the shell are enhanced.
Epoxy resin and aqueous polyamide imide are used as basic paint, glass fiber is added into the basic paint to improve the wear resistance of the paint and the air tightness after a wear-resistant layer is formed, but the glass fiber and the basic paint have the problem of poor compatibility; therefore, the amino acid modified molybdenum disulfide is introduced into the invention to improve the heat stability of the wear-resistant layer, and the amino acid modified molybdenum disulfide is added into the base coating, so that the chemical bond generated by the reaction of the amino group and the epoxy group enhances the interaction force between the molybdenum disulfide and the epoxy resin, the amination modification improves the binding force between the molybdenum disulfide and the water-based polyamide-imide, and the amino group is combined with the carboxyl on the surface of the glass fiber, thereby greatly enhancing the complexity of a molecular network in the wear-resistant layer and enhancing the air tightness of the shell.
Further, in the step S5, the ratio of [ m (amino acid modified molybdenum disulfide) +m (modified glass fiber) ]/[ m (TDE-85 epoxy resin) +m (aqueous polyamideimide) ] is 10.5-12.5%.
Further, in the step S5, the mass ratio of the TDE-85 epoxy resin to the aqueous polyamide imide to the methyltetrahydrophthalic anhydride is 2:2:1; the mass ratio of the amino acid modified molybdenum disulfide to the modified glass fiber is 3:1.
Further, the preparation of the amino acid modified molybdenum disulfide comprises the following steps: dividing amino acid into amino acid A and amino acid B according to the mass ratio of 6:1, mixing and stirring the amino acid A and distilled water, performing ultrasonic dispersion, adding molybdenum disulfide, stirring for 20h at 18-25 ℃ with the mass ratio of 15:1, performing ultrasonic treatment for 10h, centrifuging for 1-2h at 1400-1450r/min after ultrasonic treatment, taking out supernatant, adding the supernatant into amino acid B, performing ultrasonic treatment for 5h, centrifuging for 1h at 10000r/min, continuously replacing the solution with distilled water until redundant amino acid in the solution is removed, and drying to obtain the amino acid modified molybdenum disulfide.
Further, the preparation of the modified glass fiber comprises the following steps:
(1) Ultrasonically mixing glass fiber with acetone, refluxing at 70 ℃ for 20-22h, adding a mixed solution of concentrated nitric acid and concentrated sulfuric acid in a volume ratio of 1:1, reacting at 90-98 ℃ for 1.5-2h, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating for 3-5 times until the pH of the solution is 6.8-7.2, and vacuum drying to obtain acidified glass fiber;
(2) Preparing a silane coupling agent solution by using absolute ethyl alcohol, a silane coupling agent KH550 and deionized water, adding an acidified glass fiber into the silane coupling agent solution, stirring, adding an ethanol solution, stirring for 25-30min by ultrasound, transferring into a silicone oil bath, heating to 75-78 ℃, stirring, refluxing for 3h, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating and cleaning, centrifuging for 5-8 times, and drying in vacuum to obtain a silanized glass fiber;
(3) Dispersing graphene oxide into N, N-dimethylformamide solution, adding silanized glass fiber, ultrasonically stirring for 1h, transferring into silicone oil bath, heating to 100-105 ℃, stirring and refluxing for 5h, centrifuging, adding deionized water and absolute ethyl alcohol, performing shake cleaning, centrifuging for 5-8 times, and vacuum drying to obtain the modified glass fiber.
Further, the mass-volume ratio of the glass fiber to the acetone is 1g to 50mL; the volume ratio of the silane coupling agent solution to the deionized water is 36:10:5 by using 72ml of absolute ethyl alcohol, 20ml of silane coupling agent KH550 and 10ml of deionized water; the mass volume ratio of the acidified glass fiber to the silane coupling agent solution is 2g to 40mL; the volume ratio of the ethanol solution to the silane coupling agent solution is 1:3.
The combination degree between the wear-resistant paint and the shell body is improved by sand blasting, the wear-resistant paint needs to be kept stand for 20 hours after being coated on the surface of the shell body, so that air entering the paint during blade coating is discharged as much as possible, and the internal holes of the cured coating are reduced; in order to prevent the coating from being heated unevenly to generate stress due to the fact that the curing temperature rises too fast, cracks are generated in the coating to influence the coating performance, the wear-resistant coating is cured by adopting staged slow heating to finish the coating curing: the temperature is kept at 70 ℃ for 1h (the moisture on the surface of the coating is primarily removed), the temperature is kept at 160 ℃ for 2h (the molecular chain of the resin is completely crosslinked and solidified), and the coating and the matrix shrink unevenly to avoid the decrease of the bonding strength and even the falling caused by the sudden decrease of the ambient temperature after solidification, and the coating and the vacuum drying oven are slowly cooled to the room temperature after solidification.
The invention has the beneficial effects that:
the invention provides a wear-resistant aluminum alloy shell for a high-voltage GIS and a processing technology thereof.
The ZAlSi7MgA is subjected to modification forging, aluminum-silicon alloy is added, so that the mass fraction of silicon in the shell body is 8.5-10.5%, the wear resistance of the shell is improved, rare earth Sc and Al-B refiner are added as modifier for modification treatment, the problem that the aluminum alloy body has larger tendency of oxidization and pinholes in the conventional casting process is solved, the hardness, the wear resistance, the thermal stability and the fatigue resistance of the shell are obviously improved, and the strengthening effect is generated.
By controlling the addition amount of rare earth Sc and Al-B, the modifier has good long-acting property and remelting stability on the modification effect of the shell, can eliminate hydrogen and oxygen gases existing in the shell, greatly reduce the needle hole rate of the shell, greatly reduce the defects of shrinkage porosity, segregation, thermal cracking tendency and the like of the shell, and obviously improve the yield; al-B is selected to replace Al-5Ti-B, so that the stability of the refining effect is improved; B. the rare earth Sc and the Al form intermetallic compounds with face-centered cubic structures, the lattice constants of the intermetallic compounds and the lattice constants of the alpha-Al have a good co-lattice relationship, and grains are refined cooperatively; by adjusting the addition amount of the modifier, the residual Fe-rich phase in the shell is changed from long needle-like to granular and short rod-like, the end is round, and the pinhole tendency of the shell is greatly reduced.
The method comprises the steps of coating the surface of an aluminum alloy shell for a high-voltage GIS to form a wear-resistant layer, enhancing the wear resistance and air tightness of the shell, using epoxy resin and aqueous polyamide imide as basic paint, acidifying glass fiber, adding hydroxyl and carboxyl on the surface, then performing graphene oxide grafting after silanization on the surface of the glass fiber, improving the bonding force between the glass fiber and the basic paint, introducing amino acid modified molybdenum disulfide to improve the heat stability of the wear-resistant layer, adding the amino acid modified molybdenum disulfide into the basic paint, enhancing the interaction force between the molybdenum disulfide and the epoxy resin through a chemical bond generated by the reaction of amino and epoxy groups, improving the bonding force between the molybdenum disulfide and the aqueous polyamide imide through amination modification, combining the amino group with the carboxyl on the surface of the glass fiber, and greatly enhancing the complexity of a molecular network in the wear-resistant layer and enhancing the air tightness of the shell through the introduction of limiting components.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications such as up, down, left, right, front, and rear … … are involved in the embodiment of the present invention, the directional indications are merely used to explain a relative positional relationship, a movement condition, and the like between a certain posture such as the respective components, and if the certain posture is changed, the directional indications are changed accordingly. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The following description of the embodiments of the present invention will be presented in further detail with reference to the examples, which should be understood as being merely illustrative of the present invention and not limiting.
Example 1
A processing technology of a wear-resistant aluminum alloy shell for a high-voltage GIS comprises the following steps:
s1: taking ZAlSi7MgA as alloy steel, putting the alloy steel into a high-frequency electromagnetic induction smelting furnace for melting, heating to 725 ℃, adding hexachloroethane for heat preservation for 20min, then heating to 735 ℃, adding an alterant and aluminum-silicon alloy for modification treatment, and preserving heat for 4min;
the modifier is prepared by compounding an Al-B refiner and rare earth Sc in a mass ratio of 4:3; the mass fraction of silicon in the aluminum alloy shell body is 8.5%; the mass fraction of rare earth Sc in the shell is 0.28%; the mass fraction of the Al-B refiner in the shell is 0.37%;
s2: when the temperature of the melt is reduced to 675 ℃, transferring the melt into a cold chamber die casting machine for non-vacuum die casting to obtain an ingot; the preheating temperature of the die is 180 ℃, and the injection speed is 4.5m/s;
s3: preserving the heat of the ingot for 12 hours at 540 ℃, taking out and then cooling in air;
s4: then polishing, cleaning, blow-drying, pre-straightening, peeling, fine straightening and cutting in sequence to obtain an aluminum alloy shell body;
s5: dispersing 0.315g of amino acid modified molybdenum disulfide into N-methylpyrrolidone by ultrasonic, adding 2g of TDE-85 epoxy resin, carrying out ultrasonic treatment at 18 ℃ for 1h, grinding 3 times after removing a solvent, adding 2g of aqueous polyamide-imide, 0.105g of modified glass fiber and 1g of methyltetrahydrophthalic anhydride, and blending for 10min at a speed of 1800r/min in a vacuum environment by using a planetary vacuum mixer to obtain a wear-resistant coating;
in the step S5, the ratio of [ m (amino acid modified molybdenum disulfide) +m (modified glass fiber) ]/[ m (TDE-85 epoxy resin) +m (aqueous polyamideimide) ] is 10.5%;
the preparation of the amino acid modified molybdenum disulfide comprises the following steps: dividing amino acid into 30g of amino acid A and 5g of amino acid B according to a mass ratio of 6:1, mixing and stirring the amino acid A and 100mL of distilled water, performing ultrasonic dispersion, adding 2g of molybdenum disulfide, stirring for 20h at 18 ℃, performing ultrasonic treatment for 10h, centrifuging for 2h at 1400r/min after ultrasonic treatment, taking out supernatant, adding the supernatant into the amino acid B, performing ultrasonic treatment for 5h, centrifuging for 1h at 10000r/min, continuously replacing the solution with distilled water until redundant amino acid in the solution is removed, and drying to obtain amino acid modified molybdenum disulfide;
the preparation of the modified glass fiber comprises the following steps:
(1) Ultrasonically mixing 2g of glass fiber with 100mL of acetone, refluxing for 20h at 70 ℃, adding 50mL of a mixed solution of concentrated nitric acid and concentrated sulfuric acid with the volume ratio of 1:1, reacting for 2h at 90 ℃, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating for 3 times until the pH of the solution is 6.8, and vacuum drying to obtain acidified glass fiber;
(2) Preparing a silane coupling agent solution by 36mL of absolute ethyl alcohol, 10mL of silane coupling agent KH550 and 5mL of deionized water, adding 2g of acidified glass fiber into 40mL of silane coupling agent solution, stirring, adding 10mL of ethanol solution, ultrasonically stirring for 25min, transferring into a silicone oil bath, heating to 75 ℃, stirring and refluxing for 3h, adding deionized water and absolute ethyl alcohol after centrifugation, oscillating and cleaning, centrifuging for 5 times, and vacuum drying to obtain silanized glass fiber;
(3) Dispersing 0.1g of graphene oxide into 120mLN, N-dimethylformamide solution, adding 0.8g of silanized glass fiber, ultrasonically stirring for 1h, transferring into a silicone oil bath, heating to 100 ℃, stirring and refluxing for 5h, adding deionized water and absolute ethyl alcohol after centrifugation, oscillating and cleaning, centrifuging for 5 times, and vacuum drying to obtain modified glass fiber;
s6: and (3) carrying out sand blasting treatment on the surface of the aluminum alloy shell obtained in the step (S4), coating the wear-resistant coating on the surface of the aluminum alloy shell, standing for 20h, preserving heat for 1h at 120 ℃, and then heating to 160 ℃ and preserving heat for 2h to form a wear-resistant layer, thereby obtaining the wear-resistant aluminum alloy shell for the high-voltage GIS.
Example 2
A processing technology of a wear-resistant aluminum alloy shell for a high-voltage GIS comprises the following steps:
s1: taking ZAlSi7MgA as alloy steel, putting the alloy steel into a high-frequency electromagnetic induction smelting furnace for melting, heating to 725 ℃, adding hexachloroethane for heat preservation for 22min, then heating to 740 ℃, adding an alterant and aluminum-silicon alloy for modification treatment, and preserving heat for 5min;
the modifier is prepared by compounding an Al-B refiner and rare earth Sc in a mass ratio of 4:3; the mass fraction of silicon in the aluminum alloy shell body is 9%; the mass fraction of rare earth Sc in the shell is 0.29%; the mass fraction of the Al-B refiner in the shell is 0.39%;
s2: when the temperature of the melt is reduced to 680 ℃, transferring the melt into a cold chamber die casting machine for non-vacuum die casting to obtain an ingot; the preheating temperature of the die is 180 ℃, and the injection speed is 5m/s;
s3: preserving the heat of the cast ingot at 542 ℃ for 12 hours, taking out and then cooling in air;
s4: then polishing, cleaning, blow-drying, pre-straightening, peeling, fine straightening and cutting in sequence to obtain an aluminum alloy shell body;
s5: dispersing 0.33g of amino acid modified molybdenum disulfide into N-methylpyrrolidone by ultrasonic, adding 2g of TDE-85 epoxy resin, carrying out ultrasonic treatment at 20 ℃ for 1.2 hours, grinding for 4 times after removing the solvent, adding 2g of aqueous polyamide imide, 0.11g of modified glass fiber and 1g of methyltetrahydrophthalic anhydride, and blending for 12 minutes at 1850r/min in a vacuum environment by using a planetary vacuum mixer to obtain the wear-resistant coating;
in the step S5, the ratio of [ m (amino acid modified molybdenum disulfide) +m (modified glass fiber) ]/[ m (TDE-85 epoxy resin) +m (aqueous polyamideimide) ] is 11%;
the preparation of the amino acid modified molybdenum disulfide comprises the following steps: dividing amino acid into 30g of amino acid A and 5g of amino acid B according to a mass ratio of 6:1, mixing and stirring the amino acid A and 100mL of distilled water, performing ultrasonic dispersion, adding 2g of molybdenum disulfide, stirring for 20h at 20 ℃, performing ultrasonic treatment for 10h, centrifuging for 1.5h at 1425r/min after ultrasonic treatment, taking out supernatant, adding the supernatant into the amino acid B, performing ultrasonic treatment for 5h, centrifuging for 1h at 10000r/min, continuously replacing the solution with distilled water until redundant amino acid in the solution is removed, and drying to obtain amino acid modified molybdenum disulfide;
the preparation of the modified glass fiber comprises the following steps:
(1) Ultrasonically mixing 2g of glass fiber with 100mL of acetone, refluxing for 21h at 70 ℃, adding 50mL of a mixed solution of concentrated nitric acid and concentrated sulfuric acid with the volume ratio of 1:1, reacting for 1.8h at 90-98 ℃, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating for 4 times until the pH of the solution is 7, and vacuum drying to obtain acidified glass fiber;
(2) Preparing a silane coupling agent solution by 36mL of absolute ethyl alcohol, 10mL of silane coupling agent KH550 and 5mL of deionized water, adding 2g of acidified glass fiber into 40mL of silane coupling agent solution, stirring, adding 10mL of ethanol solution, ultrasonically stirring for 28min, transferring into a silicone oil bath, heating to 76 ℃, stirring and refluxing for 3h, adding deionized water and absolute ethyl alcohol after centrifugation, oscillating and cleaning, centrifuging for 7 times, and vacuum drying to obtain silanized glass fiber;
(3) Dispersing 0.1g of graphene oxide into 120mLN, N-dimethylformamide solution, adding 0.8g of silanized glass fiber, ultrasonically stirring for 1h, transferring into a silicone oil bath, heating to 102 ℃, stirring and refluxing for 5h, adding deionized water and absolute ethyl alcohol after centrifugation, oscillating and cleaning, centrifuging for 7 times, and vacuum drying to obtain modified glass fiber;
s6: and (3) carrying out sand blasting treatment on the surface of the aluminum alloy shell obtained in the step (S4), coating the wear-resistant coating on the surface of the aluminum alloy shell, standing for 20h, preserving heat for 1h at 120 ℃, and then heating to 160 ℃ and preserving heat for 2h to form a wear-resistant layer, thereby obtaining the wear-resistant aluminum alloy shell for the high-voltage GIS.
Example 3
A processing technology of a wear-resistant aluminum alloy shell for a high-voltage GIS comprises the following steps:
s1: taking ZAlSi7MgA as alloy steel, putting the alloy steel into a high-frequency electromagnetic induction smelting furnace for melting, heating to 725 ℃, adding hexachloroethane for heat preservation for 25min, then heating to 745 ℃, adding an alterant and aluminum-silicon alloy for modification treatment, and preserving heat for 7min;
the modifier is prepared by compounding an Al-B refiner and rare earth Sc in a mass ratio of 4:3; the mass fraction of silicon in the aluminum alloy shell body is 10.5%; the mass fraction of rare earth Sc in the shell is 0.3%; the mass fraction of the Al-B refiner in the shell is 0.4%;
s2: when the temperature of the melt is reduced to 685 ℃, transferring the melt into a cold chamber die casting machine for non-vacuum die casting to obtain an ingot; the preheating temperature of the die is 180 ℃, and the injection speed is 6m/s;
s3: preserving the heat of the cast ingot at 545 ℃ for 12 hours, taking out and then cooling in air;
s4: then polishing, cleaning, blow-drying, pre-straightening, peeling, fine straightening and cutting in sequence to obtain an aluminum alloy shell body;
s5: dispersing 0.375g of amino acid modified molybdenum disulfide into N-methylpyrrolidone by ultrasonic, adding 2g of TDE-85 epoxy resin, carrying out ultrasonic treatment at 25 ℃ for 1.5 hours, removing the solvent, grinding for 5 times, adding 2g of aqueous polyamide imide, 0.125g of modified glass fiber and 1g of methyltetrahydrophthalic anhydride, and blending for 15 minutes in a vacuum environment at a speed of 1900r/min by using a planetary vacuum mixer to obtain the wear-resistant coating;
in the step S5, the ratio of [ m (amino acid modified molybdenum disulfide) +m (modified glass fiber) ]/[ m (TDE-85 epoxy resin) +m (aqueous polyamideimide) ] is 12.5%;
the preparation of the amino acid modified molybdenum disulfide comprises the following steps: dividing amino acid into 30g of amino acid A and 5g of amino acid B according to a mass ratio of 6:1, mixing and stirring the amino acid A and 100mL of distilled water, performing ultrasonic dispersion, adding 2g of molybdenum disulfide, stirring for 20h at 25 ℃, performing ultrasonic treatment for 10h, centrifuging for 1-2h at 1450r/min after ultrasonic treatment, taking out supernatant, adding the supernatant into the amino acid B, performing ultrasonic treatment for 5h, centrifuging for 1h at 10000r/min, continuously replacing the solution with distilled water until redundant amino acid in the solution is removed, and drying to obtain amino acid modified molybdenum disulfide;
the preparation of the modified glass fiber comprises the following steps:
(1) Ultrasonically mixing 2g of glass fiber with 100mL of acetone, refluxing at 70 ℃ for 22h, adding 50mL of a mixed solution of concentrated nitric acid and concentrated sulfuric acid with the volume ratio of 1:1, reacting at 98 ℃ for 1.5h, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating for 5 times until the pH of the solution is 7.2, and vacuum drying to obtain acidified glass fiber;
(2) Preparing a silane coupling agent solution by 36mL of absolute ethyl alcohol, 10mL of silane coupling agent KH550 and 5mL of deionized water, adding 2g of acidified glass fiber into 40mL of silane coupling agent solution, stirring, adding 10mL of ethanol solution, stirring for 30min, transferring into a silicone oil bath, heating to 78 ℃, stirring and refluxing for 3h, adding deionized water and absolute ethyl alcohol after centrifugation, oscillating and cleaning, centrifuging for 8 times, and vacuum drying to obtain silanized glass fiber;
(3) Dispersing 0.1g of graphene oxide into 120mLN, N-dimethylformamide solution, adding 0.8g of silanized glass fiber, ultrasonically stirring for 1h, transferring into a silicone oil bath, heating to 105 ℃, stirring and refluxing for 5h, adding deionized water and absolute ethyl alcohol after centrifugation, oscillating and cleaning, centrifuging for 8 times, and vacuum drying to obtain modified glass fiber;
s6: and (3) carrying out sand blasting treatment on the surface of the aluminum alloy shell obtained in the step (S4), coating the wear-resistant coating on the surface of the aluminum alloy shell, standing for 20h, preserving heat for 1h at 120 ℃, and then heating to 160 ℃ and preserving heat for 2h to form a wear-resistant layer, thereby obtaining the wear-resistant aluminum alloy shell for the high-voltage GIS.
Comparative example 1
With example 2 as a control group, the mass fraction of silicon in the aluminum alloy housing body was 8%, and the other processes were normal.
Comparative example 2
With example 2 as a control group, the mass fraction of silicon in the aluminum alloy housing body was 11%, and the other processes were normal.
Comparative example 3
With the example 2 as a control group, the mass fraction of rare earth Sc in the shell is 0.32%, the mass fraction of Al-B refiner in the shell is 0.43%, and other procedures are normal.
Comparative example 4
With the example 2 as a control group, the mass fraction of rare earth Sc in the shell is 0.3%, the mass fraction of Al-B refiner in the shell is 0.43%, and other procedures are normal.
Comparative example 5
In the case of example 2 as a control group, the ratio of [ m (amino acid modified molybdenum disulfide) +m (modified glass fiber) ] to [ m (TDE-85 epoxy resin) +m (aqueous polyamideimide) ] in step S5 was 8%, and the other steps were normal.
Comparative example 6
In the case of example 2 as a control group, the ratio of [ m (amino acid modified molybdenum disulfide) +m (modified glass fiber) ] to [ m (TDE-85 epoxy resin) +m (aqueous polyamideimide) ] in step S5 was 11%, and the other steps were normal.
Comparative example 7
With example 2 as a control group, the mass ratio of the amino acid modified molybdenum disulfide to the modified glass fiber was not 3:1, the amino acid modified molybdenum disulfide was 0.33g, the mass of the modified glass fiber was 0.15g, and the other steps were normal.
Comparative example 8
No wear-resistant layer is prepared, and other working procedures are normal.
Comparative example 9
After the wear-resistant layer is prepared, the wear-resistant layer is not kept stand for 20 hours and then is heated and solidified, and other working procedures are normal.
Performance test:
the hardness of the shells obtained in examples 1 to 4 and comparative examples 1 to 9 was measured with reference to GB/T231.1 to 2018;
the friction rate is tested by an MFT-5000 type friction wear testing machine, the motion mode is a reciprocating mode, the silicon nitride ceramic balls with the diameter of 9.5mm are adopted for facing the surface of the grinding shell during reciprocating motion, and the parameters are as follows: the load is 10N, the frequency is 1Hz, the reciprocating distance is 10mm, and the test time is 20min; after the completion, placing the shell into an acetone solution for ultrasonic cleaning for 5min, wiping the surface by using absorbent cotton, and removing surface abrasive dust residues; observing the surface abrasion mark morphology of the shell by using an MFP-D three-dimensional morphology instrument (white light interference), and calculating the abrasion rate (W) of the abrasion layer, wherein the formula is W=V/(F.L), and V is the abrasion volume (mm) 3 ) F is normal load (N), L is total length (m) of reciprocating motion of the ceramic ball; the results obtained are shown in Table 1;
hardness (HBW) Wear rate (10) -4 mm 3 /Nm)
Example 1 110 0.42
Example 2 115 0.38
Example 3 113 0.41
Comparative example 1 102 0.56
Comparative example 2 105 0.55
Comparative example 3 104 0.53
Comparative example 4 106 0.50
Comparative example 5 105 0.61
Comparative example 6 103 0.62
Comparative example 7 102 0.69
Comparative example 8 95 0.78
Comparative example 9 108 0.60
TABLE 1
Comparing example 2 with comparative example 1 and comparative example 2, it is known that the mass fraction of silicon in the body of the housing is defined to be 8.5-10.5% to improve the wear resistance of the housing.
As can be seen from the comparison of the example 2 with the comparative example 3 and the comparative example 4, the rare earth Sc and the Al-B refiner are added as the modifier to carry out modification treatment, and the modification effect of the modifier on the shell is good in long-acting property and remelting stability by controlling the addition amount of the rare earth Sc and the Al-B, so that hydrogen and oxygen gas existing in the shell can be removed, the needle hole rate of the shell is greatly reduced, the defects such as shrinkage cavity, segregation and thermal cracking tendency of the shell are greatly reduced, and the yield is obviously improved; al-B is selected to replace Al-5Ti-B, so that the stability of the refining effect is improved; B. the rare earth Sc and the Al form intermetallic compounds with face-centered cubic structures, the lattice constants of the intermetallic compounds and the lattice constants of the alpha-Al have a good co-lattice relationship, and grains are refined cooperatively; the residual Fe-rich phase in the shell is changed into particles and short rods from long needle sheets by adjusting the addition amount of the modifier, the end part is round, the pinhole tendency of the shell is greatly reduced, the hardness and the wear resistance of the shell are obviously improved, and the strengthening effect is generated;
by comparing example 2 with comparative example 5, comparative example 6, comparative example 7 and comparative example 8, it is known that the wear-resistant layer is formed by coating the surface of the aluminum alloy shell for the high-pressure GIS, the wear resistance and the air tightness of the shell are enhanced, epoxy resin and aqueous polyamide imide are used as basic paint, hydroxyl and carboxyl on the surface are increased after the glass fiber is acidified, graphene oxide grafting is performed after the surface of the glass fiber is silanized, the bonding force between the glass fiber and the basic paint is improved, molybdenum disulfide modified by amino acid is introduced to improve the heat stability of the wear-resistant layer, the amino acid modified molybdenum disulfide is added into the basic paint, the chemical bond generated by the reaction of the amino group and the epoxy group enhances the interaction force between the molybdenum disulfide and the epoxy resin, the amino group modification improves the bonding force between the molybdenum disulfide and the aqueous polyamide imide, the amino group is combined with the carboxyl on the surface of the glass fiber, the complexity of a molecular network in the wear-resistant layer is greatly enhanced by introducing limiting components, and the air tightness of the shell is enhanced.
As can be seen from comparing example 2 with comparative example 9, the paint needs to be kept stand for 20 hours after being coated on the surface of the aluminum alloy substrate, so that air entering the paint during blade coating can be discharged as much as possible, and the internal holes of the cured coating can be reduced. In order to avoid the problem that the local heating of the coating is unbalanced to generate stress when the curing temperature rises too fast, so that the coating generates cracks to influence the coating performance, the coating is cured by adopting staged slow heating, and the coating is cured by adopting the following heating mode: the temperature is kept at 70 ℃ for 1h (the moisture on the surface of the coating is primarily removed), the temperature is kept at 160 ℃ for 2h (the molecular chain of the resin is completely crosslinked and solidified), and the coating and the matrix shrink unevenly to avoid the decrease of the bonding strength and even the falling caused by the sudden decrease of the ambient temperature after solidification, and the coating and the vacuum drying oven are slowly cooled to the room temperature after solidification.
In conclusion, the aluminum alloy shell for the high-voltage GIS, which is good in wear resistance and high in air tightness, is prepared and has a good application prospect.
The foregoing description is only exemplary embodiments of the present invention and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the present invention in the light of the inventive concept, or the direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (10)

1. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS is characterized by comprising the following steps of:
s1: taking ZAlSi7MgA as a raw material, putting the raw material into a high-frequency electromagnetic induction smelting furnace for melting, heating to 725 ℃, adding hexachloroethane, preserving heat for 20-25min, then heating to 735-745 ℃, adding an alterant and aluminum-silicon alloy for modification treatment, and preserving heat for 4-7min;
s2: when the temperature of the melt is reduced to 675-685 ℃, transferring the melt into a cold chamber die casting machine for non-vacuum die casting to obtain an ingot;
s3: preserving the heat of the ingot for 12 hours at the temperature of 540-545 ℃, taking out and then cooling in air;
s4: then polishing, cleaning, blow-drying, pre-straightening, peeling, fine straightening and cutting in sequence to obtain an aluminum alloy shell body;
s5: dispersing amino acid modified molybdenum disulfide into N-methylpyrrolidone by ultrasonic, adding TDE-85 epoxy resin, performing ultrasonic treatment at 18-25 ℃ for 1-1.5 hours, removing a solvent, grinding for 3-5 times, adding water-based polyamide imide, modified glass fiber and methyltetrahydrophthalic anhydride, and blending for 10-15 minutes at a speed of 1800-1900r/min in a vacuum environment by using a vacuum mixer to obtain the wear-resistant coating;
s6: and (3) carrying out sand blasting treatment on the surface of the aluminum alloy shell body obtained in the step (S4), coating the wear-resistant paint on the surface of the aluminum alloy shell body, standing for 20h, preserving heat for 1h at 120 ℃, and then heating to 160 ℃ and preserving heat for 2h to form a wear-resistant layer, thereby obtaining the wear-resistant aluminum alloy shell for the high-voltage GIS.
2. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS, according to claim 1, is characterized in that the modifier in the step S1 is obtained by compounding an Al-B refiner and rare earth Sc in a mass ratio of 4:3; the mass fraction of silicon in the aluminum alloy shell body is 8.5-10.5%; the mass fraction of rare earth Sc in the shell body is 0.28-0.3%.
3. The process for machining the wear-resistant aluminum alloy shell for the high-voltage GIS according to claim 1, wherein the preheating temperature of the die in the step S2 is 180 ℃, and the injection speed is 4.5-6m/S.
4. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS, according to claim 1, is characterized in that in the step S5, the sum of the mass of the amino acid modified molybdenum disulfide and the mass of the modified glass fiber is calculated as M1, the sum of the mass of the TDE-85 epoxy resin and the mass of the aqueous polyamide imide is calculated as M2, and the mass ratio of the M1 to the M2 is 10.5-12.5%.
5. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS, according to claim 1, is characterized in that in the step S5, the mass ratio of TDE-85 epoxy resin, aqueous polyamide imide and methyltetrahydrophthalic anhydride is 2:2:1; the mass ratio of the amino acid modified molybdenum disulfide to the modified glass fiber is 3:1.
6. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS, according to claim 1, is characterized in that the preparation of the amino acid modified molybdenum disulfide comprises the following steps: dividing amino acid into amino acid A and amino acid B according to the mass ratio of 6:1, mixing and stirring the amino acid A and distilled water, performing ultrasonic dispersion, adding molybdenum disulfide, stirring for 20h at 18-25 ℃ with the mass ratio of 15:1, performing ultrasonic treatment for 10h, centrifuging for 1-2h at 1400-1450r/min after ultrasonic treatment, taking out supernatant, adding the supernatant into amino acid B, performing ultrasonic treatment for 5h, centrifuging for 1h at 10000r/min, continuously replacing the solution with distilled water until redundant amino acid in the solution is removed, and drying to obtain the amino acid modified molybdenum disulfide.
7. The process for processing the wear-resistant aluminum alloy shell for the high-voltage GIS according to claim 1, wherein the preparation of the modified glass fiber comprises the following steps:
(1) Ultrasonically mixing glass fiber with acetone, refluxing at 70 ℃ for 20-22h, adding a mixed solution of concentrated nitric acid and concentrated sulfuric acid in a volume ratio of 1:1, reacting at 90-98 ℃ for 1.5-2h, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating for 3-5 times until the pH of the solution is 6.8-7.2, and vacuum drying to obtain acidified glass fiber;
(2) Preparing a silane coupling agent solution by using absolute ethyl alcohol, a silane coupling agent KH550 and deionized water, adding an acidified glass fiber into the silane coupling agent solution, stirring, adding an ethanol solution, stirring for 25-30min by ultrasound, transferring into a silicone oil bath, heating to 75-78 ℃, stirring, refluxing for 3h, centrifuging, adding deionized water and absolute ethyl alcohol, oscillating and cleaning, centrifuging for 5-8 times, and drying in vacuum to obtain a silanized glass fiber;
(3) Dispersing graphene oxide into N, N-dimethylformamide solution, adding silanized glass fiber, ultrasonically stirring for 1h, transferring into silicone oil bath, heating to 100-105 ℃, stirring and refluxing for 5h, centrifuging, adding deionized water and absolute ethyl alcohol, performing shake cleaning, centrifuging for 5-8 times, and vacuum drying to obtain the modified glass fiber.
8. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS, which is characterized in that the mass-volume ratio of glass fiber to acetone is 1g to 50mL; the volume ratio of absolute ethyl alcohol, silane coupling agent KH550 and deionized water in the silane coupling agent solution is 36:10:5; the mass volume ratio of the acidified glass fiber to the silane coupling agent solution is 2g to 40mL; the volume ratio of the ethanol solution to the silane coupling agent solution is 1:3.
9. The processing technology of the wear-resistant aluminum alloy shell for the high-voltage GIS, according to claim 7, is characterized in that the mass-volume ratio of graphene oxide to silanized glass fiber to N, N-dimethylformamide solution is 0.1g:0.8g:120mL.
10. A wear resistant aluminum alloy housing for a high voltage GIS, characterized by being processed by the processing technology of any one of claims 1-9.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS627896A (en) * 1985-07-03 1987-01-14 Mitsubishi Electric Corp Treatment of surface
CN2882901Y (en) * 2006-04-18 2007-03-28 夏中汉 Sphericity grinder
CN101966575A (en) * 2010-11-13 2011-02-09 河南理工大学 Process for casting aluminum alloy wheel and heat treatment process
CN105400372A (en) * 2015-12-16 2016-03-16 襄阳市百盾防护涂层材料有限公司 Wear-resistant coating material
CN108977677A (en) * 2018-08-02 2018-12-11 鹰普航空零部件（无锡）有限公司 The metamorphism treatment method of aluminium alloy in a kind of low pressure casting process
CN110564299A (en) * 2019-08-07 2019-12-13 湖北安达精密工业有限公司 Lubricating wear-resistant paint for coating bearing bush, bearing bush and bearing bush spraying method
CN113122739A (en) * 2021-03-18 2021-07-16 江苏锐美汽车零部件有限公司 Process method for improving mechanical property of A356 aluminum alloy

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS627896A (en) * 1985-07-03 1987-01-14 Mitsubishi Electric Corp Treatment of surface
CN2882901Y (en) * 2006-04-18 2007-03-28 夏中汉 Sphericity grinder
CN101966575A (en) * 2010-11-13 2011-02-09 河南理工大学 Process for casting aluminum alloy wheel and heat treatment process
CN105400372A (en) * 2015-12-16 2016-03-16 襄阳市百盾防护涂层材料有限公司 Wear-resistant coating material
CN108977677A (en) * 2018-08-02 2018-12-11 鹰普航空零部件（无锡）有限公司 The metamorphism treatment method of aluminium alloy in a kind of low pressure casting process
CN110564299A (en) * 2019-08-07 2019-12-13 湖北安达精密工业有限公司 Lubricating wear-resistant paint for coating bearing bush, bearing bush and bearing bush spraying method
CN113122739A (en) * 2021-03-18 2021-07-16 江苏锐美汽车零部件有限公司 Process method for improving mechanical property of A356 aluminum alloy

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