CN113583541A - Antirust heat-resistant deformed steel and processing technology thereof - Google Patents

Antirust heat-resistant deformed steel and processing technology thereof Download PDF

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Publication number
CN113583541A
CN113583541A CN202110941357.XA CN202110941357A CN113583541A CN 113583541 A CN113583541 A CN 113583541A CN 202110941357 A CN202110941357 A CN 202110941357A CN 113583541 A CN113583541 A CN 113583541A
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heat
antirust
coating
resistant
deformed steel
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吴小虎
王啸桐
吴志超
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Changzhou City Fangzheng Sectional Steel Co ltd
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Changzhou City Fangzheng Sectional Steel Co ltd
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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
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    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract

The invention provides an antirust heat-resistant deformed steel and a processing technology thereof, wherein the deformed steel comprises a base material, a heat-resistant layer and an antirust layer; the chemical composition of the base material is as follows by mass percent: carbon: 0.2-1%, silicon: 2-3%, tungsten: 8.2-10%, molybdenum: 2-6%, chromium: 20-45%, cobalt: 0.1-0.2 percent of manganese, 0.5-1 percent of vanadium, 0.2-0.6 percent of vanadium and the balance of iron; the processing technology of the base material comprises the following steps of cleaning, dephosphorization, rolling, cooling control and straightening: placing a steel billet in a cleaning solution, ultrasonically cleaning, heating to 1000-1200 ℃ in a furnace after drying, removing scale by using high-pressure water of 15-25MPa after discharging and cooling, firstly sending the steel billet to a two-roll reversible rolling mill for rough rolling, then adopting a universal continuous rolling unit for continuous rolling, controlling cooling and straightening to obtain a base material; performing sand blasting treatment on the substrate, coating the epoxy micaceous iron intermediate paint on the surface of the substrate, and then coating the epoxy micaceous iron intermediate paint with an antirust coating as an antirust layer; and coating a heat-resistant coating on the antirust layer to serve as a heat-resistant layer.

Description

Antirust heat-resistant deformed steel and processing technology thereof
Technical Field
The invention relates to the field of steel rolling processing, in particular to antirust heat-resistant deformed steel and a processing technology thereof.
Background
The section steel is one of four major varieties (section, line, plate and pipe) of steel, and can be divided into simple section steel and complex and abnormal section steel (section steel) according to the section shape, such as 'Wang' shaped middle beam steel, 'C' section steel, 'H' section steel, 'E' section steel, 'Z' section steel, 'SQ' section steel and the like.
Due to the unicity and the particularity of the use, the requirement on the precision of the deformed steel is high, so that the requirement on the capacity of equipment is higher; the sectional shape is complex, and many special-shaped steels are special for specific occasions, so that the difficulty of hole pattern design and production is increased, and the production cost of the special-shaped steels is higher than that of the simple-section steel.
With the development of national economy, more and more steel sections related to the national civilization, such as large-scale H-shaped steel, high-speed rail heavy rails and the like, have increased requirements, so that the requirements on the dimensional precision control of the deformed steel and the detail processing of the section shape are higher; in a complex environment, the deformed steel needs to have the characteristics of high temperature resistance, corrosion resistance, high strength, long service life, excellent comprehensive performance and the like; however, the materials used for manufacturing the deformed steel at present have low strength and limited toughness, and the conventional deformed steel is easy to generate rust stains on the deformed steel pipe after being used for a long time, and is easy to be corroded by acidic and alkaline objects, so that the service life of the deformed steel pipe is influenced.
Therefore, under the background, the heat-resistant antirust deformed steel is provided, the deformed steel processing technology which can be suitable for processing various deformed steels only by simply replacing the die, ensures high yield and low loss rate and saves cost is very urgent.
Disclosure of Invention
The invention aims to provide an antirust heat-resistant deformed steel and a processing technology thereof, which aim to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
the processing technology of the antirust heat-resistant deformed steel comprises the following steps:
s1: preparation of the substrate
(1) Adding molten iron and scrap steel into a converter for composite blowing, tapping at 1580-; adding carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochromium, high-carbon ferrotungsten and vanadium-nitrogen alloy powder, then hoisting the mixture into a ladle refining furnace, carrying out vacuum degassing, blowing argon for stirring, adjusting the pH to 5.0-7.0, then heating the molten steel to 1450-plus-1500 ℃ by a graphite electrode, adding a heat insulating agent, casting the mixture into a steel billet, cooling the steel billet, then placing the steel billet into a cleaning solution, cleaning the steel billet for 10-30min at 60-100 ℃ under the action of ultrasonic waves, taking out and drying the steel billet; heating the dried mixture to 1000-1200 ℃ in a furnace, taking the mixture out of the furnace, cooling the mixture, and removing scale by using high-pressure water at 15-25MPa to obtain a blank;
(2) conveying the blank to a two-roller reversible rolling mill for rough rolling at the initial rolling temperature of 1100-;
further, the chemical composition of the base material is as follows by mass percent: carbon: 0.2-1%, silicon: 2-3%, tungsten: 8.2-10%, molybdenum: 2-6%, chromium: 20-45%, cobalt: 0.1-0.2%, nickel: 8 to 25 percent of manganese, 0.5 to 1 percent of vanadium, 0.2 to 0.6 percent of vanadium and the balance of iron;
furthermore, the heat insulating agent can be rapidly spread into a three-layer structure on the surface of the molten steel, harmful impurities on the surface are adsorbed, and the heat radiation and secondary oxidation of the molten steel are avoided; the heat insulating agent is prepared from calcium oxide, aluminum oxide, graphite and silicon dioxide in proportion.
The invention uses the converter and the ladle refining furnace to manufacture the steel billet, can accurately regulate and control the precision of molten steel, and improve the quality of the steel billet; molten steel is heated by electric arc, so that components can be adjusted and supplemented during ladle refining, and slag is supplemented to facilitate deep desulfurization and deoxidation of the molten steel; after a ladle in a ladle refining furnace is hung in a vacuum tank, vacuum degassing is carried out by using a steam jet pump, argon is blown in through the ladle bottom to stir molten steel, the hydrogen and nitrogen contents in the molten steel are removed, the oxygen and sulfur contents are further reduced, and finally the obtained molten steel has high purity and good performance;
the existing deformed steel is easy to rust, and the service life is influenced, the chromium content in the deformed steel is improved, a compact chromium oxide film can be formed on the surface of the deformed steel, and a nickel oxide-cobalt oxide-chromium oxide composite oxide film with good protection can be formed in a certain temperature range due to the addition of a proper amount of cobalt and nickel in the deformed steel, so that corrosive gases such as oxygen, sulfur, nitrogen and the like can be prevented from diffusing into the steel, metal ions can be prevented from diffusing out, and the high-temperature oxidation resistance of the deformed steel is enhanced;
tungsten and molybdenum are dissolved in metal in a solid way, so that the self-diffusion of iron can be inhibited, the recrystallization temperature of the solid solution is improved, the alloy elements which reduce a gamma-Fe phase region and expand an alpha-Fe phase region are all strong carbide forming elements, the tungsten and the molybdenum can form an aging strengthening phase and are added together to play a synergistic role, and the strength and the heat resistance of the deformed steel are greatly improved; vanadium is introduced through the vanadium-nitrogen alloy, crystal grains can be refined, and the crystal grains are synergistically strengthened together with tungsten and molybdenum, so that the mechanical property of the deformed steel is improved;
the billet is put into cleaning solution to be cleaned so as to remove the surface material of the base material, so that the interference on the subsequent process is avoided, the microstructure of the billet is better stabilized, and the performance reduction of the prepared deformed steel caused by the introduction of impurities in the subsequent conversion process is prevented;
the rough rolling of the invention adopts a two-roller reversible rolling mill for rolling, the rolling force is large, the large deformation rolling can be carried out on the billet, the defects on the billet are eliminated, the rolling times can be reduced, the loss is reduced, and the productivity is improved; the universal continuous rolling unit is used for continuous rolling, so that the rolling rhythm is improved, and the temperature drop is reduced, so that the heating temperature of the billet can be reduced, the energy consumption is reduced, and the cost is saved;
s2: preparation of an anti-rust layer
(1) Mixing, stirring and ultrasonically dispersing water-soluble epoxy resin and acrylate emulsion, adding modified nano aluminum tripolyphosphate, hydroxypropyl methylcellulose, epoxy silane coupling agent, pigment and distilled water, ultrasonically stirring, and filtering to obtain antirust coating A;
(2) mixing, stirring and ultrasonically dispersing the graphene oxide, the nano titanium dioxide and the distilled water, and standing to obtain an antirust coating B; uniformly mixing the antirust coating A and the antirust coating B to obtain an antirust coating;
cleaning a base material, then blowing sand on the surface of the base material, coating the epoxy micaceous iron intermediate paint on the surface of the base material, then coating an antirust coating on the epoxy micaceous iron intermediate paint, and drying to form an antirust layer;
further, in the step S2(1), the weight ratio of the water-based epoxy resin, the acrylate emulsion, the nano aluminum tripolyphosphate, the hydroxypropyl methylcellulose, the epoxy silane coupling agent, the pigment and the distilled water is 50 (3-10): 1-2): 0.4-1.2): 0.1-0.5): 4-8): 20;
further, in the step S2(1), the pigment is one or more of bentonite, diatomite, kaolin, quartz powder, talcum powder, titanium dioxide, pearl powder and calcium carbonate;
further, in the step S2(2), the mass ratio of the graphene oxide to the nano titanium dioxide is 2: 1;
in order to further improve the antirust capacity of the deformed steel and prolong the service life of the deformed steel, a film is formed by using water-soluble epoxy resin and acrylate emulsion, modified nano aluminum tripolyphosphate, hydroxypropyl methylcellulose and pigment are used as filling materials, the modified nano aluminum tripolyphosphate can be uniformly attached to the water-soluble epoxy resin and the acrylate, a compact cross-linked network can be formed in a conformal mode, so that the antirust and corrosion resistant performance of an antirust layer is improved, the titanium dioxide is modified by graphene oxide, and then the graphene oxide is attached to the water-soluble epoxy resin and the acrylate, so that the interface effect of the water-soluble epoxy resin and the acrylate can be changed, and the compatibility of the water-soluble epoxy resin and the acrylate is improved;
before coating the paint, in order to increase the adhesive force of the paint, the base material is subjected to sand blowing treatment, then a layer of epoxy micaceous iron intermediate paint is coated on the base material, and then the antirust paint is coated, so that the antirust and anticorrosive performances of the deformed steel can be greatly improved, and the service life of the deformed steel is prolonged;
the epoxy micaceous iron intermediate paint is Zhongkangtaibo epoxy micaceous iron intermediate paint;
s3: preparation of Heat-resistant layer
(1) The absolute ethyl alcohol is divided into two parts, and one part of the absolute ethyl alcohol is mixed and stirred with tetrabutyl titanate to prepare a solution A; mixing a part of absolute ethyl alcohol, glacial acetic acid and deionized water to prepare a solution B; under the stirring condition, the solution is dripped into the solution A until light yellow sol appears, then the stirring is continued, the pH is adjusted to be 2.5-4.5, the solution is kept stand for 9-14h at the temperature of 18-25 ℃, hollow glass beads are added, the filtration and the drying are carried out after the ultrasonic stirring, and the calcination is carried out at the temperature of 620 ℃ and 780 ℃ to obtain modified glass beads;
(2) mixing and stirring graphene oxide quantum dots, modified glass beads and gamma-aminopropyltriethoxysilane, ultrasonically dispersing in distilled water, performing reflux reaction for 9-14h at 60-100 ℃, adding organic silicon resin and phenolic resin, and heating and stirring at 50-90 ℃ to obtain a heat-resistant coating;
(3) and (3) coating a heat-resistant coating on the antirust layer, and drying to form a heat-resistant layer to obtain the antirust heat-resistant deformed steel.
Further, in the step S3(1), the mass ratio of the absolute ethyl alcohol to the tetrabutyl titanate to the glacial acetic acid to the deionized water is (8-32) to 1:2: 1.
Furthermore, in the step S3(2), the content ratio of the graphene oxide quantum dots, the modified glass beads and the gamma-aminopropyltriethoxysilane is 1:2 (0.1-0.5) by mass, and the volume ratio of the organic silicon resin and the phenolic resin is (1-2: 1).
The hollow glass beads and the organic silicon resin have good heat resistance, but the hollow glass beads and the organic silicon resin and the phenolic resin have poor compatibility, and the hollow glass beads are easy to agglomerate to influence the performance; preparing titanium dioxide coated hollow glass microspheres by tetrabutyl titanate, glacial acetic acid and absolute ethyl alcohol according to the method;
a large number of creative experiments show that the pH value of the sol is between 2.5 and 4.5, the sol is stood for 9 to 14 hours and then added with the hollow glass beads for stirring, the hollow glass beads uniformly coated with the titanium dioxide can be obtained, and the calcination is carried out at the temperature of 620-780 ℃ to only change the crystal form of the titanium dioxide coated on the surfaces of the hollow glass beads, namely the anatase type; the organic silicon resin and the phenolic resin are filled with the graphene oxide quantum dots and the modified glass beads, so that the interface effect between the organic silicon resin and the phenolic resin can be changed, the compatibility is improved, the oxygen-containing groups on the graphene oxide quantum dots can crosslink the organic silicon resin and the phenolic resin, the graphene oxide quantum dots can be uniformly attached to the titanium dioxide on the surfaces of the glass beads, the graphene oxide quantum dots and the titanium dioxide generate a synergistic effect, the heat resistance of a heat-resistant layer is greatly improved, and the toughness and the mechanical property of the deformed steel are improved.
The invention has the beneficial effects that:
at present, the deformed steel is easy to rust, and the service life is influenced, a nickel oxide-cobalt oxide-chromium sesquioxide composite oxide film with good protection can be formed on the surface of a base material, so that corrosive gases such as oxygen, sulfur, nitrogen and the like can be prevented from diffusing into the steel, metal ions can be prevented from diffusing outwards, and the high-temperature oxidation resistance of the deformed steel is enhanced; according to the invention, tungsten and molybdenum added into the base material are strong carbide forming elements, and the tungsten and the molybdenum can form an aging strengthening phase and are added together to play a synergistic effect, so that the strength and the heat resistance of the deformed steel are greatly improved; vanadium is introduced through the vanadium-nitrogen alloy, crystal grains can be refined, and the crystal grains are synergistically strengthened together with tungsten and molybdenum, so that the mechanical property of the deformed steel is improved;
the billet is put into cleaning solution to be cleaned so as to remove the surface material of the base material, so that the interference on the subsequent process is avoided, the rough rolling adopts a two-roller reversible rolling mill for rolling, the rolling force is large, the large deformation rolling can be carried out on the billet, the defects on the billet are eliminated, the rolling frequency can be reduced, and the loss is reduced; the universal continuous rolling unit is used for continuous rolling, so that the rolling rhythm is improved, and the temperature drop is reduced, so that the heating temperature of the billet can be reduced, the energy consumption is reduced, and the cost is saved;
in order to further improve the antirust capacity of the deformed steel and prolong the service life of the deformed steel, the invention uses water-soluble epoxy resin and acrylate emulsion to form a film, uses modified nano aluminum tripolyphosphate, hydroxypropyl methylcellulose and pigment as fillers, and uses graphene oxide and nano titanium dioxide for modification treatment to prepare the antirust coating;
before coating the paint, in order to increase the adhesive force of the paint, the base material is subjected to sand blowing treatment, then a layer of epoxy micaceous iron intermediate paint is coated on the base material, and then the antirust paint is coated, so that the antirust and anticorrosive performances of the deformed steel can be greatly improved, and the service life of the deformed steel is prolonged;
the hollow glass beads and the organic silicon resin have good heat resistance, but the hollow glass beads and the organic silicon resin and the phenolic resin have poor compatibility, and the hollow glass beads are easy to agglomerate to influence the performance; preparing titanium dioxide coated hollow glass microspheres by tetrabutyl titanate, glacial acetic acid and absolute ethyl alcohol according to the method; obtaining hollow glass beads uniformly coated with titanium dioxide, calcining at the temperature of 620-780 ℃ to only change the crystal form of the titanium dioxide coated on the surfaces of the hollow glass beads, wherein the crystal form is anatase; the organic silicon resin and the phenolic resin are filled with the graphene oxide quantum dots and the modified glass beads, the graphene oxide quantum dots can be uniformly attached to titanium dioxide on the surfaces of the glass beads, and the graphene oxide quantum dots and the titanium dioxide generate a synergistic effect, so that the heat resistance of a heat-resistant layer is greatly improved, and the toughness and the mechanical property of the deformed steel are improved;
in conclusion, the deformed steel produced by the method realizes reasonable matching of high strength, high toughness, rust prevention and heat property, and has the advantages of lower production cost, higher process applicability, operability, controllable product quality and the like.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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.
It should be noted that if directional indications such as up, down, left, right, front, and back … … are involved in the embodiment of the present invention, the directional indications are only used to explain a specific posture, such as a relative positional relationship between components, a motion situation, and the like, and if the specific posture changes, the directional indications also change accordingly. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The technical solutions of the present invention are further described in detail with reference to the following specific examples, which should be understood as merely illustrative and not limitative.
Example 1
S1: preparation of the substrate
(1) Adding molten iron and scrap steel into a converter for combined blowing, tapping at 1580 ℃, and blowing argon for stirring in the whole tapping process; adding carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochromium, high-carbon ferrotungsten and ferrovanadium alloy powder, then hoisting the powder to a ladle refining furnace for argon blowing and stirring, adjusting the pH to 5.0, then heating the molten steel to 1450 ℃ by a graphite electrode, and then adding a heat preservation agent, wherein the molten steel comprises the following chemical compositions in percentage by content: carbon: 0.2%, silicon: 2%, tungsten: 8.2%, molybdenum: 2%, chromium: 45%, cobalt: 0.1 percent of manganese, 0.5 percent of vanadium, 0.2 percent of vanadium and the balance of iron are cast into steel billets, the steel billets are put into a cleaning solution after being cooled, cleaned for 30min at 60 ℃ under the action of ultrasonic waves, taken out and dried; heating the dried mixture to 1000 ℃ in a furnace, taking the mixture out of the furnace, cooling the mixture, and descaling the mixture by using high-pressure water at 15MPa to obtain a blank;
(2) conveying the blank to a two-roller reversible rolling mill for rough rolling at the initial rolling temperature of 1100 ℃ and the final rolling temperature of 900 ℃, then adopting a universal continuous rolling unit for continuous rolling, finishing deformation at the initial rolling temperature of 700 ℃ and the final rolling temperature of 600 ℃, cooling to 80 ℃, and conveying to a straightening machine for straightening to obtain a base material;
s2: preparation of an anti-rust layer
(1) According to the weight parts, the weight ratio of water-based epoxy resin, acrylate emulsion, nano aluminum tripolyphosphate, hydroxypropyl methylcellulose, epoxy silane coupling agent, bentonite and distilled water is 50:3:1:0.4 (0.1-0.5) 4:20, the water-soluble epoxy resin and the acrylate emulsion are mixed, stirred and ultrasonically dispersed, the nano aluminum tripolyphosphate, the hydroxypropyl methylcellulose, the epoxy silane coupling agent, the bentonite and the distilled water are added, then ultrasonic stirring is carried out, and the antirust coating A is obtained after filtration;
(2) mixing, stirring and ultrasonically dispersing graphene oxide, nano titanium dioxide and distilled water in a mass ratio of 2:1, and standing to obtain an antirust coating B; uniformly mixing the antirust coating A and the antirust coating B to obtain an antirust coating;
(3) cleaning a base material, then blowing sand on the surface of the base material, coating the epoxy micaceous iron intermediate paint on the surface of the base material, then coating an antirust coating on the epoxy micaceous iron intermediate paint, and drying to form an antirust layer;
s3: preparation of Heat-resistant layer
(1) The mass ratio of the absolute ethyl alcohol to the tetrabutyl titanate to the glacial acetic acid to the deionized water is 8:1:2:1, the absolute ethyl alcohol is divided into two parts, and one part of the absolute ethyl alcohol and the tetrabutyl titanate are mixed and stirred to prepare a solution A; mixing a part of absolute ethyl alcohol, glacial acetic acid and deionized water to prepare a solution B; under the stirring condition, the solution is dripped into the solution A until pale yellow sol appears, then stirring is continued, standing is carried out for 9h at the temperature of 18 ℃, hollow glass beads are added, filtering is carried out after ultrasonic stirring, drying is carried out, and calcining is carried out at the temperature of 600 ℃ to obtain modified glass beads;
(2) the preparation method comprises the following steps of (1) mixing and stirring graphene oxide quantum dots, modified glass beads and gamma-aminopropyltriethoxysilane in a mass ratio of 1:2:0.1 and a volume ratio of organic silicon resin to phenolic resin of 1:1, ultrasonically dispersing the mixture in distilled water, carrying out reflux reaction at 60 ℃ for 12 hours, adding the organic silicon resin and the phenolic resin, and heating and stirring at 50 ℃ to obtain the heat-resistant coating;
(3) and (3) coating a heat-resistant coating on the antirust layer, and drying to form a heat-resistant layer to obtain the antirust heat-resistant deformed steel.
Example 2
S1: preparation of the substrate
(1) Adding molten iron and scrap steel into a converter for combined blowing, tapping at 1610 ℃, and blowing argon for stirring in the whole tapping process; adding carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochromium, high-carbon ferrotungsten and ferrovanadium alloy powder, then lifting to a ladle refining furnace to blow argon and stir, adjusting the pH to 6.2, then heating the molten steel to 1480 ℃ by a graphite electrode, and then adding a heat preservation agent, wherein the molten steel comprises the following chemical compositions in percentage by content: carbon: 0.5%, silicon: 2.4%, tungsten: 8.6%, molybdenum: 4%, chromium: 40%, cobalt: 0.15 percent of manganese, 0.8 percent of vanadium, 0.4 percent of vanadium and the balance of iron are cast into steel billets, the steel billets are put into a cleaning solution after being cooled, cleaned for 20min at 80 ℃ under the action of ultrasonic waves, taken out and dried; heating to 1100 ℃ in a furnace after drying, taking out of the furnace, cooling, and descaling by using high-pressure water of 20MPa to obtain a blank;
(2) sending the blank to a two-roller reversible rolling mill for rough rolling at the initial rolling temperature of 1150 ℃ and the final rolling temperature of 1000 ℃, then adopting a universal continuous rolling unit for continuous rolling, finishing deformation at the initial rolling temperature of 800 ℃ and the final rolling temperature of 700 ℃, cooling to 100 ℃, sending to a straightening machine for straightening, and obtaining a base material;
s2: preparation of an anti-rust layer
(1) According to the weight part ratio, the weight ratio of water-based epoxy resin, acrylate emulsion, nano aluminum tripolyphosphate, hydroxypropyl methylcellulose, epoxy silane coupling agent, pearl powder and distilled water is 50:6:1:1:0.3:6:20, the water-soluble epoxy resin and the acrylate emulsion are mixed, stirred and ultrasonically dispersed, the nano aluminum tripolyphosphate, the hydroxypropyl methylcellulose, the epoxy silane coupling agent, the pearl powder and the distilled water are added, then the ultrasonic stirring is carried out, and the antirust coating A is obtained after filtering;
(2) mixing, stirring and ultrasonically dispersing graphene oxide, nano titanium dioxide and distilled water in a mass ratio of 2:1, and standing to obtain an antirust coating B; uniformly mixing the antirust coating A and the antirust coating B to obtain an antirust coating;
(3) cleaning a base material, then blowing sand on the surface of the base material, coating the epoxy micaceous iron intermediate paint on the surface of the base material, then coating an antirust coating on the epoxy micaceous iron intermediate paint, and drying to form an antirust layer;
s3: preparation of Heat-resistant layer
(1) The mass ratio of the absolute ethyl alcohol to the tetrabutyl titanate to the glacial acetic acid to the deionized water is 20:1:2:1, the absolute ethyl alcohol is divided into two parts, and one part of the absolute ethyl alcohol and the tetrabutyl titanate are mixed and stirred to prepare a solution A; mixing a part of absolute ethyl alcohol, glacial acetic acid and deionized water to prepare a solution B; under the stirring condition, the solution is dripped into the solution A until pale yellow sol appears, then the solution is continuously stirred, the solution is kept stand for 12 hours at the temperature of 25 ℃, hollow glass beads are added, the solution is filtered after ultrasonic stirring, dried and calcined at the temperature of 700 ℃, and the modified glass beads are obtained;
(2) the preparation method comprises the following steps of (1) mixing and stirring graphene oxide quantum dots, modified glass beads and gamma-aminopropyltriethoxysilane in a mass ratio of 1:2:0.3 and a volume ratio of organic silicon resin to phenolic resin of 1.5:1, ultrasonically dispersing the graphene oxide quantum dots, the modified glass beads and the gamma-aminopropyltriethoxysilane in distilled water, carrying out reflux reaction for 14 hours at 80 ℃, adding the organic silicon resin and the phenolic resin, and heating and stirring at 80 ℃ to obtain the heat-resistant coating;
(3) and (3) coating a heat-resistant coating on the antirust layer, and drying to form a heat-resistant layer to obtain the antirust heat-resistant deformed steel.
Example 3
S1: preparation of the substrate
(1) Adding molten iron and scrap steel into a converter for combined blowing, tapping at 1620 ℃, and blowing argon for stirring during tapping; adding carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochromium, high-carbon ferrotungsten and ferrovanadium alloy powder, then hoisting the powder to a ladle refining furnace for argon blowing and stirring, adjusting the pH to 7.0, then heating the molten steel to 1500 ℃ by a graphite electrode, and then adding a heat preservation agent, wherein the molten steel comprises the following chemical compositions in percentage by content: carbon: 1%, silicon: 3%, tungsten: 10%, molybdenum: 6%, chromium: 20%, cobalt: 0.2 percent of manganese, 1 percent of vanadium, 0.6 percent of vanadium and the balance of iron are cast into a steel billet, the steel billet is put into a cleaning solution after being cooled, cleaned for 10min at 100 ℃ under the action of ultrasonic waves, taken out and dried; heating the dried mixture to 1200 ℃ in a furnace, taking the mixture out of the furnace, cooling the mixture, and descaling the mixture by using high-pressure water at 25MPa to obtain a blank;
(2) sending the blank to a two-roller reversible rolling mill for rough rolling at the beginning rolling temperature of 1200 ℃ and the end rolling temperature of 1050 ℃, then adopting a universal continuous rolling unit for continuous rolling, finishing deformation at the beginning rolling temperature of 900 ℃ and the end rolling temperature of 800 ℃, cooling to 120 ℃, sending to a straightening machine for straightening, and obtaining a base material;
s2: preparation of an anti-rust layer
(1) According to the weight part ratio, the weight ratio of water-based epoxy resin, acrylate emulsion, nano aluminum tripolyphosphate, hydroxypropyl methylcellulose, epoxy silane coupling agent, diatomite and distilled water is 50:10:2:1.2:0.5:8:20, the water-soluble epoxy resin and the acrylate emulsion are mixed, stirred and ultrasonically dispersed, the nano aluminum tripolyphosphate, the hydroxypropyl methylcellulose, the epoxy silane coupling agent, the diatomite and the distilled water are added, then the ultrasonic stirring is carried out, and the antirust coating A is obtained after filtering;
(2) mixing, stirring and ultrasonically dispersing graphene oxide, nano titanium dioxide and distilled water in a mass ratio of 2:1, and standing to obtain an antirust coating B; uniformly mixing the antirust coating A and the antirust coating B to obtain an antirust coating;
(3) cleaning a base material, then blowing sand on the surface of the base material, coating the epoxy micaceous iron intermediate paint on the surface of the base material, then coating an antirust coating on the epoxy micaceous iron intermediate paint, and drying to form an antirust layer;
s3: preparation of Heat-resistant layer
(1) The mass ratio of the absolute ethyl alcohol to the tetrabutyl titanate to the glacial acetic acid to the deionized water is 32:1:2:1, the absolute ethyl alcohol is divided into two parts, and one part of the absolute ethyl alcohol and the tetrabutyl titanate are mixed and stirred to prepare a solution A; mixing a part of absolute ethyl alcohol, glacial acetic acid and deionized water to prepare a solution B; under the stirring condition, the solution is dripped into the solution A until pale yellow sol appears, then the solution is continuously stirred, the solution is kept stand for 9 hours at the temperature of 25 ℃, hollow glass beads are added, the solution is filtered after ultrasonic stirring, dried and calcined at the temperature of 800 ℃, and the modified glass beads are obtained;
(2) the preparation method comprises the following steps of mixing and stirring graphene oxide quantum dots, modified glass beads and gamma-aminopropyltriethoxysilane in a mass ratio of 1:2:0.5 and organic silicon resin and phenolic resin in a volume ratio of 2:1, ultrasonically dispersing the mixture in distilled water, carrying out reflux reaction at 100 ℃ for 12 hours, adding the organic silicon resin and the phenolic resin, and heating and stirring at 90 ℃ to obtain the heat-resistant coating;
(3) and (3) coating a heat-resistant coating on the antirust layer, and drying to form a heat-resistant layer to obtain the antirust heat-resistant deformed steel.
Example 4
In example 3, in step S2(1), the pearl powder was replaced with kaolin, and the other steps were carried out normally.
Example 5
In example 3, in step S2(1), the pearl powder was replaced with quartz powder, and the other steps were carried out normally.
Example 6
In the step S2(1) in example 3, titanium dioxide is replaced with pearl powder, and other processes react normally.
And (3) performance testing:
the strength of the deformed steel processed in the examples 1 to 6 is tested by referring to GB/T228-2002, the tensile strength and the yield strength of the deformed steel are tested by using a microcomputer controlled electronic universal tester, the tensile speed is 5mm/min, and the test results are shown in the table I;
Figure BDA0003215108540000101
TABLE 1
The special-shaped steel processed in the examples 1 to 6 is subjected to a salt spray test according to reference GB/T1771-2007; the deformed steel processed in the examples 1 to 6 is cut into a steel plate with the thickness of 150X75mm and the thickness of 1mm, and the steel plate is put into a salt spray box for testing, the temperature in the salt spray box is 33 to 37 ℃, the exposure time is 1000 hours, and the performance test is shown in the table 2;
example 1 Example 2 Example 3 Example 4 Example 5 Example 6
Surface condition of the surface No corrosion No corrosion No corrosion No corrosion No corrosion No corrosion
TABLE 2
As can be seen from the above tests, the deformed steels processed in examples 1 to 6 have excellent yield strength and tensile strength;
in examples 1 to 6, the surface was free from rust when exposed to a salt spray test for 1000 hours, indicating that the processed deformed steel had excellent rust resistance;
in addition, the deformed steel also has excellent heat resistance and long service life.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.

Claims (9)

1. A processing technology of antirust heat-resistant deformed steel is characterized in that: the production process of the special-shaped steel comprises the following steps:
s1: preparation of the substrate
(1) Adding molten iron and scrap steel into a converter for composite blowing, tapping at 1580-; adding carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochromium, high-carbon ferrotungsten and ferrovanadium alloy powder, hoisting the powder to a ladle refining furnace, blowing argon for stirring, adjusting the pH to 5.0-7.0, heating the molten steel to 1450-1500 ℃, adding a heat insulating agent, casting the mixture into a steel billet, cooling, putting the steel billet into a cleaning solution, cleaning for 10-30min at 60-100 ℃ under the action of ultrasonic, taking out and drying; heating the dried mixture to 1000-1200 ℃ in a furnace, taking the mixture out of the furnace, cooling the mixture, and removing scale by using high-pressure water at 15-25MPa to obtain a blank;
(2) rough rolling the blank at the initial rolling temperature of 1100-;
s2: preparation of an anti-rust layer
(1) Mixing, stirring and ultrasonically dispersing water-soluble epoxy resin and acrylate emulsion, adding nano aluminum tripolyphosphate, hydroxypropyl methylcellulose, epoxy silane coupling agent, pigment and distilled water, ultrasonically stirring, and filtering to obtain antirust coating A;
(2) mixing, stirring and ultrasonically dispersing the graphene oxide, the nano titanium dioxide and the distilled water, and standing to obtain an antirust coating B; uniformly mixing the antirust coating A and the antirust coating B to obtain an antirust coating;
(3) cleaning a base material, then blowing sand on the surface of the base material, coating the epoxy micaceous iron intermediate paint on the surface of the base material, then coating an antirust coating on the epoxy micaceous iron intermediate paint, and drying to form an antirust layer;
s3: preparation of Heat-resistant layer
(1) Mixing and stirring graphene oxide quantum dots, modified glass beads and gamma-aminopropyltriethoxysilane, ultrasonically dispersing in distilled water, performing reflux reaction at 60-100 ℃ for 12-24h, adding organic silicon resin and phenolic resin, and heating and stirring at 50-90 ℃ to obtain a heat-resistant coating;
(2) and (3) coating a heat-resistant coating on the antirust layer, and drying to form a heat-resistant layer to obtain the antirust heat-resistant deformed steel.
2. The process for processing the rustproof heat-resistant deformed steel according to claim 1, wherein: in the step S1(1), the base material comprises the following chemical compositions in percentage by mass: carbon: 0.2-1%, silicon: 2-3%, tungsten: 8.2-10%, molybdenum: 2-6%, chromium: 20-45%, cobalt: 0.1-0.2 percent of manganese, 0.5-1 percent of vanadium, 0.2-0.6 percent of vanadium and the balance of iron.
3. The process for processing the rustproof heat-resistant deformed steel according to claim 1, wherein: in the step S2(1), the weight ratio of the water-based epoxy resin, the acrylate emulsion, the nano aluminum tripolyphosphate, the hydroxypropyl methylcellulose, the epoxy silane coupling agent, the pigment and the distilled water is 50 (3-10): 1-2): 0.4-1.2: (0.1-0.5): 4-8): 20.
4. The process for processing the rustproof heat-resistant deformed steel according to claim 1, wherein: in the step S2(1), the pigment is one or more of bentonite, diatomite, kaolin, quartz powder, talcum powder, titanium dioxide, pearl powder and calcium carbonate.
5. The process for processing the rustproof heat-resistant deformed steel according to claim 1, wherein: in the step S2(2), the mass ratio of the graphene oxide to the nano titanium dioxide is 2:1.
6. The process for processing the rustproof heat-resistant deformed steel according to claim 1, wherein: the preparation method of the modified glass in the step S3(1) comprises the following steps: the absolute ethyl alcohol is divided into two parts, and one part of the absolute ethyl alcohol is mixed and stirred with tetrabutyl titanate to prepare a solution A; mixing a part of absolute ethyl alcohol, glacial acetic acid and deionized water to prepare a solution B; under the stirring condition, the solution B is dripped into the solution A until light yellow sol appears, then stirring is continued, standing is carried out for 9-14h at the temperature of 18-25 ℃, hollow glass beads are added, filtering and drying are carried out after ultrasonic stirring, and calcination is carried out at the temperature of 600 plus materials and 800 ℃, thus obtaining the modified glass beads.
7. The process for processing the rustproof heat-resistant deformed steel according to claim 6, wherein: the mass ratio of the absolute ethyl alcohol to the tetrabutyl titanate to the glacial acetic acid to the deionized water is (8-32) to 1:2: 1.
8. The process for processing the rustproof heat-resistant deformed steel according to claim 1, wherein: in the step S3(2), the content ratio of the graphene oxide quantum dots, the modified glass beads and the gamma-aminopropyltriethoxysilane is 1:2 (0.1-0.5), and the volume ratio of the organic silicon resin and the phenolic resin is (1-2) to 1.
9. An antirust heat-resistant deformed steel is characterized in that: processed by the process of any one of claims 1 to 8.
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Application publication date: 20211102