CN110438432B - Preparation method of one-dimensional component high-temperature-resistant film layer composite coating - Google Patents

Preparation method of one-dimensional component high-temperature-resistant film layer composite coating Download PDF

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CN110438432B
CN110438432B CN201910865164.3A CN201910865164A CN110438432B CN 110438432 B CN110438432 B CN 110438432B CN 201910865164 A CN201910865164 A CN 201910865164A CN 110438432 B CN110438432 B CN 110438432B
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CN110438432A (en
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李文生
何东青
翟海民
李旭强
汤鹏君
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Lanzhou University of Technology
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C23C28/341—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one carbide layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129—Flame spraying
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
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Abstract

The invention discloses a preparation method of a one-dimensional component high-temperature-resistant film composite coating, which comprises the steps of firstly uniformly mixing granulated steel bond hard alloy powder with zirconium dioxide short fibers and an adhesive, placing the mixture in a reducing gas flame power spraying device, spraying the mixture on the surface of No. 45 steel to obtain a fiber reinforced steel bond hard alloy coating, roughly grinding the surface of the coating, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology to finally obtain the micro-doped one-dimensional component high-temperature-resistant film composite coating. The method has the advantages of high control precision of the thickness of the film layer, strong process stability and repeatability, and realization of strong interface and high performance of the film layer composite coating.

Description

Preparation method of one-dimensional component high-temperature-resistant film layer composite coating
Technical Field
The invention relates to the technical field of preparation of film composite coatings, in particular to a preparation method of a one-dimensional component high-temperature-resistant film composite coating.
Background
The high temperature resistance and the corrosion resistance of pipelines used in the industries of petroleum, chemical engineering, pharmacy and the like are key indexes for evaluating the service performance of the pipelines. The coating technology is an economic and effective means for improving the high-temperature corrosion resistance of the industrial pipeline, but a simple coating is difficult to combine strong interface bonding and high-temperature corrosion resistance. The film lamination technique is an effective method for solving the above-mentioned contradiction, but the interface problem and the corrosion resistance problem are difficult to improve. Therefore, a new method is found, and the important thing is to strengthen the interface of the film, the layer and the matrix and improve the high-temperature corrosion resistance.
Disclosure of Invention
The invention provides a preparation method of a one-dimensional component high-temperature-resistant film layer composite coating, aiming at the current situation of the research and development field that the common means are difficult to effectively coordinate the interface problem and the corrosion resistance problem. The method has the advantages of high control precision of the thickness of the film layer, strong process stability and repeatability, and realization of strong interface and high performance of the film layer composite coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a one-dimensional component high-temperature-resistant film composite coating comprises the following steps:
1) uniformly mixing the granulated steel bond hard alloy powder and the zirconium dioxide short fibers with an adhesive, placing the mixture in a reducing gas flame power spraying device, and spraying the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating, wherein the mass percentage of the granulated steel bond hard alloy powder to the zirconium dioxide short fibers is (99.89-99.96): (0.04 to 0.11);
2) and (3) roughly grinding the surface of the coating, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology to finally obtain the micro-doped one-dimensional component high-temperature-resistant film layer composite coating.
As a further improvement of the invention, the average grain size of the granulated steel bond hard alloy powder is 40-70 μm, and the Rockwell hardness is 56-62.
As a further improvement of the invention, the section diameter of the zirconium dioxide short fiber is 150-210 nm, and the average length is 3.3 μm.
As a further improvement of the invention, the adhesive is 15mol/L PVA aqueous solution, and the dosage of the adhesive is 3-8 g per kilogram of mixed powder.
As a further improvement of the invention, the reducing gas flame power spraying device comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, wherein the natural air speed is 3-7 m/s, the preheating gas temperature and flow rate are 50-70 ℃ and 120-170 ml/s, and the medium-temperature combustion-supporting air temperature and flow rate are 230-270 ℃ and 140-176 m/s.
As a further improvement of the invention, the thickness of the obtained fiber reinforced steel bonded hard alloy coating is 0.1-0.4 mm.
As a further improvement of the invention, the surface of the coarse grinding coating adopts a silicon carbide cutting element, and the grinding depth is 1-3 μm.
As a further improvement of the invention, the pulse current period of the pulse current deposition technology is 2-5 milliseconds, the maximum current peak value is 23-32 amperes, the deposition solution is deionized water, and the size of the titanium carbide colloid is 34-63 nm.
As a further improvement of the invention, the thickness of the obtained titanium carbide film is 3-7 μm.
As a further improvement of the invention, the surface hardness of the prepared film composite coating is more than or equal to 55HRC, the interface bonding strength is more than or equal to 170MPa, the corrosion rate of the concentrated hydrochloric acid solution at 350 ℃ is less than or equal to 0.12 micrometer/hour, and the corrosion rate of the sodium hydroxide solution at 350 ℃ is less than or equal to 0.15 micrometer/hour.
Compared with the prior art, the invention has the following characteristics and advantages:
firstly, uniformly mixing granulated steel bond hard alloy powder, zirconium dioxide short fibers and an adhesive, placing the mixture in a reducing gas flame power spraying device, spraying the mixture on the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating, coarsely grinding the surface of the coating, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology; the zirconium dioxide short fibers effectively stabilize a particle interface, a film layer interface and a coating matrix interface through an embedding effect and a filling effect, and fill particle pores, so that the coating compactness is improved; the reducing gas flame power spraying device reduces the preparation cost of the coating by using cheap fuel and an environment-friendly device. Pulsed current deposition techniques increase the compactness and strength of the membrane by pulsed current. The surface hardness of the prepared film composite coating is more than or equal to 55HRC, the interface bonding strength is more than or equal to 170MPa, the corrosion rate of a concentrated hydrochloric acid solution at 350 ℃ is less than or equal to 0.12 micrometer/hour, and the corrosion rate of a sodium hydroxide solution at 350 ℃ is less than or equal to 0.15 micrometer/hour. The method has the advantages of high control precision of the thickness of the film layer, strong process stability and repeatability, and realization of strong interface and high performance of the film layer composite coating.
Furthermore, by means of fiber reinforcement, a low-cost coating preparation technology and pulse electrodeposition film preparation, the high-temperature corrosion resistance of the film and the toughness of the coating are fully exerted, and the method is a key means for coordinating the interface problem and the corrosion resistance problem.
Further, in the process of preparing the film composite coating, in order to solve the existing problem that the interface is difficult to coordinate and the corrosion resistance problem, the invention adopts a fiber reinforced and low-cost coating preparation technology and pulse electrodeposition film preparation to research the relationship between the fiber addition amount, the reducing gas flame power spraying process, the pulse current deposition technology, the film composite coating interface and the high-temperature corrosion resistance, namely: for the film composite coating, the optimal fiber addition amount, the reducing gas flame power spraying process and the pulse current deposition technology which have higher interface strength and high-temperature corrosion resistance are kept.
Detailed Description
The invention relates to a preparation method of a one-dimensional component high-temperature-resistant film composite coating, which comprises the following steps:
(1) adding a binder to granulated steel bonded hard alloy powder with an average particle size of 40-70 μm and a Rockwell hardness of 56-62, zirconium dioxide short fibers with a cross-sectional diameter of 150-210 nm and an average length of 3.3 μm in percentage by mass (99.89-99.96): (0.04-0.11) uniformly mixing, wherein the adhesive is 15mol/L PVA aqueous solution, the using amount of which is 3-8 g/kg mixed powder, placing the mixture in a reducing gas flame power spraying device, the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3-7 m/s, the preheating gas temperature and flow rate are 50-70 ℃ and 120-170 ml/s, the medium-temperature combustion-supporting air temperature and air speed are 230-270 ℃ and 140-176 m/s, and spraying on the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating with the thickness of 2.1-3.2 mm;
(2) the method comprises the steps of roughly grinding the surface of a coating under the condition that the grinding depth is 1-3 mu m by using a silicon carbide cutting element, depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 2-5 milliseconds, the maximum current peak value is 23-32 amperes, a deposition solution is deionized water, the size of a titanium carbide colloid is 34-63 nm, and finally obtaining the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of the titanium carbide film being 3-7 mu m.
Example 1
(1) Adding a bonding agent into granulated steel bond hard alloy powder with the average particle size of 40 mu m and the Rockwell hardness of 56, zirconium dioxide short fibers with the section diameter of 150nm and the average length of 3.3 mu m according to the mass percentage of 99.89: 0.11, uniformly mixing, wherein the adhesive is 15mol/L PVA aqueous solution, the using amount of which is 3 g/kg mixed powder, placing the mixed powder in a reducing gas flame power spraying device, wherein the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3-7 m/s, the preheating gas temperature and flow are 50 ℃ and 120 ml/s, the medium-temperature combustion-supporting air temperature and flow are 230 ℃ and 140 m/s, and spraying the mixed powder on the surface of 45# steel to obtain a fiber reinforced steel-bonded hard alloy coating with the thickness of 0.1 mm;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 1 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 2 milliseconds, the maximum current peak value is 23 amperes, the deposition solution is deionized water, and the size of titanium carbide colloid is 34nm, so that the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 3 mu m of the titanium carbide film is finally obtained.
Example 2
(1) Adding a binder into granulated steel bond hard alloy powder with the average grain size of 42 mu m and the Rockwell hardness of 57, zirconium dioxide short fibers with the section diameter of 160nm and the average length of 3.3 mu m according to the mass percentage of 99.90: 0.10 of PVA aqueous solution is uniformly mixed, the amount of adhesive is 15mol/L, the amount of the PVA aqueous solution is 4 g per kilogram of mixed powder, the PVA aqueous solution is placed in a reducing gas flame power spraying device, the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3-7 m/s, the preheating gas temperature and flow are 60 ℃ and 130 ml/s, the medium-temperature combustion-supporting air temperature and flow are 240 ℃ and 156 m/s, and a fiber reinforced steel bond hard alloy coating with the thickness of 0.2mm is sprayed on the surface of 45# steel;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 2 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 3 milliseconds, the maximum current peak value is 24 amperes, the deposition solution is deionized water, the size of titanium carbide colloid is 35nm, and finally the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 4 mu m of the titanium carbide film is obtained.
Example 3
(1) Adding a binder into granulated steel bond hard alloy powder with the average particle size of 43 mu m and the Rockwell hardness of 58 and zirconium dioxide short fibers with the section diameter of 170nm and the average length of 3.3 mu m according to the mass percentage of 99.91: 0.09, uniformly mixing, namely 15mol/L of PVA aqueous solution serving as a binder, placing 5 g/kg of mixed powder into a reducing gas flame power spraying device, wherein the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3-7 m/s, the preheating gas temperature and flow rate are 55 ℃ and 140 ml/s, the medium-temperature combustion-supporting air temperature and flow rate are 250 ℃ and 145 m/s, and spraying on the surface of 45# steel to obtain a fiber reinforced steel bonded hard alloy coating with the thickness of 0.22 mm;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 3 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 5 milliseconds, the maximum current peak value is 26 amperes, the deposition solution is deionized water, and the size of titanium carbide colloid is 38nm, so that the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 6 mu m of the titanium carbide film is finally obtained.
Example 4
(1) Adding a binder into granulated steel bond hard alloy powder with the average particle size of 46 mu m and the Rockwell hardness of 59, zirconium dioxide short fibers with the section diameter of 190nm and the average length of 3.3 mu m according to the mass percentage of 99.92: 0.08 of PVA aqueous solution is uniformly mixed, the amount of a binder is 15mol/L, the amount of the PVA aqueous solution is 7 g per kilogram of mixed powder, the PVA aqueous solution is placed in a reducing gas flame power spraying device, the device mainly comprises a natural air powder feeding central passage, a preheating gas passage, a medium temperature combustion-supporting air passage, a reducing burner and a vortex chamber, the natural air speed is 7 m/s, the preheating gas temperature and the flow rate are 70 ℃ and 170 ml/s, the medium temperature combustion-supporting air temperature and the air speed are 260 ℃ and 166 m/s, and a fiber reinforced steel bond hard alloy coating with the thickness of 0.24mm is sprayed on the surface of 45# steel;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 3 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 5 milliseconds, the maximum current peak value is 32 amperes, the deposition solution is deionized water, and the size of titanium carbide colloid is 43nm, so that the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 7 mu m of the titanium carbide film is finally obtained.
The performance parameters of the film composite coatings prepared in examples 1-4 are shown in table 1:
TABLE 1
Figure BDA0002201045720000071
From the above table, the surface hardness of the prepared film composite coating is greater than or equal to 55HRC, the interface bonding strength is greater than or equal to 170MPa, the corrosion rate of the concentrated hydrochloric acid solution at 350 ℃ is less than or equal to 0.12 micrometer/hour, and the corrosion rate of the sodium hydroxide solution at 350 ℃ is less than or equal to 0.15 micrometer/hour.
Example 5
(1) Adding an adhesive into granulated steel bond hard alloy powder with the average particle size of 65 mu m and the Rockwell hardness of 62, zirconium dioxide short fibers with the section diameter of 210nm and the average length of 3.3 mu m according to the mass percentage of 99.93: 0.07, uniformly mixing, namely 15mol/L PVA aqueous solution with the adhesive, wherein the using amount of 8 g/kg mixed powder is placed in a reducing gas flame power spraying device, the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3-7 m/s, the preheating gas temperature and flow are 70 ℃ and 170 ml/s, the medium-temperature combustion-supporting air temperature and flow are 270 ℃ and 176 m/s, and a fiber reinforced steel bond hard alloy coating with the thickness of 0.26mm is sprayed on the surface of 45# steel;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 3 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 3 milliseconds, the maximum current peak value is 29 amperes, the deposition solution is deionized water, the size of titanium carbide colloid is 53nm, and finally the micro-doped one-dimensional high-temperature-resistant film composite coating with the thickness of 7 mu m of the titanium carbide film is obtained.
Example 6
(1) Adding an adhesive into granulated steel bond hard alloy powder with the average particle size of 70 mu m and the Rockwell hardness of 60, zirconium dioxide short fibers with the section diameter of 200nm and the average length of 3.3 mu m according to the mass percentage of 99.94: 0.06 of the mixture is uniformly mixed, a 15mol/L PVA aqueous solution serving as a binding agent is placed in a reducing gas flame power spraying device with the dosage of 7 g/kg mixed powder, the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 7 m/s, the preheating gas temperature and the flow rate are 70 ℃ and 170 ml/s, the medium-temperature combustion-supporting air temperature and the air speed are 270 ℃ and 172 m/s, and a fiber reinforced steel bond hard alloy coating with the thickness of 0.15mm is sprayed on the surface of 45# steel;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 3 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 5 milliseconds, the maximum current peak value is 31 amperes, the deposition solution is deionized water, and the size of titanium carbide colloid is 54nm, so that the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 5 mu m of the titanium carbide film is finally obtained.
Example 7
(1) Adding an adhesive into granulated steel bond hard alloy powder with the average particle size of 55 mu m and the Rockwell hardness of 61, zirconium dioxide short fibers with the section diameter of 160nm and the average length of 3.3 mu m according to the mass percentage of 99.96: 0.04, uniformly mixing, placing 6 g/kg of mixed powder of 15mol/L of PVA aqueous solution serving as a binder into a reducing gas flame power spraying device, wherein the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 5 m/s, the preheating gas temperature and the flow rate are 65 ℃ and 155 ml/s, the medium-temperature combustion-supporting air temperature and the air speed are 260 ℃ and 156 m/s, and spraying on the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating with the thickness of 0.18 mm;
(2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition that the grinding depth is 1.5 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 3.5 milliseconds, the maximum current peak value is 27 amperes, the deposition solution is deionized water, the colloid size of the titanium carbide is 43nm, and finally the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 7 mu m of the titanium carbide film is obtained.
Example 8
(1) Adding an adhesive into granulated steel bond hard alloy powder with the average particle size of 50 mu m and the Rockwell hardness of 57, zirconium dioxide short fibers with the section diameter of 180nm and the average length of 3.3 mu m according to the mass percentage of 99.89: 0.11, uniformly mixing, namely 15mol/L of PVA aqueous solution with the adhesive, wherein the using amount of the PVA aqueous solution is 5 g/kg of mixed powder, placing the mixed powder in a reducing gas flame power spraying device, wherein the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3-7 m/s, the preheating gas temperature and flow rate are 70 ℃ and 170 ml/s, the medium-temperature combustion-supporting air temperature and flow rate are 230 ℃ and 140 m/s, and spraying on the surface of 45# steel to obtain a fiber reinforced steel bonded hard alloy coating with the thickness of 0.4 mm;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 1 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 2 milliseconds, the maximum current peak value is 23 amperes, the deposition solution is deionized water, and the size of titanium carbide colloid is 34nm, so that the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 3 mu m of the titanium carbide film is finally obtained.
Example 9
(1) Adding a bonding agent into granulated steel bond hard alloy powder with the average particle size of 40 mu m and the Rockwell hardness of 56, zirconium dioxide short fibers with the section diameter of 150nm and the average length of 3.3 mu m according to the mass percentage of 99.89: 0.11, uniformly mixing, wherein the adhesive is 15mol/L PVA aqueous solution, the using amount of which is 3 g/kg mixed powder, placing the mixed powder in a reducing gas flame power spraying device, wherein the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 3 m/s, the preheating gas temperature and the flow rate are 50 ℃ and 120 ml/s, the medium-temperature combustion-supporting air temperature and the air speed are 230 ℃ and 140 m/s, and spraying on the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating with the thickness of 2.1 mm;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 1 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 2 milliseconds, the maximum current peak value is 23 amperes, the deposition solution is deionized water, and the size of titanium carbide colloid is 34nm, so that the micro-doped one-dimensional component high-temperature-resistant film composite coating with the thickness of 3 mu m of the titanium carbide film is finally obtained.
Example 10
(1) Adding a bonding agent into granulated steel bond hard alloy powder with the average particle size of 70 mu m and the Rockwell hardness of 62, zirconium dioxide short fibers with the section diameter of 210nm and the average length of 3.3 mu m according to the mass percentage of 99.96: 0.04, uniformly mixing, wherein the adhesive is 15mol/L PVA aqueous solution, the using amount of which is 8 g/kg mixed powder, placing the mixed powder in a reducing gas flame power spraying device, wherein the device mainly comprises a natural air powder feeding central channel, a preheating gas channel, a medium-temperature combustion-supporting air channel, a reducing burner and a vortex chamber, the natural air speed is 7 m/s, the preheating gas temperature and the flow rate are 70 ℃ and 170 ml/s, the medium-temperature combustion-supporting air temperature and the air speed are 270 ℃ and 176 m/s, and spraying on the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating with the thickness of 3.2 mm;
(2) and (2) adopting a silicon carbide cutting element, roughly grinding the surface of the coating under the condition of grinding depth of 3 mu m, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology, wherein the pulse current period of the pulse current deposition technology is 5 milliseconds, the maximum current peak value is 32 amperes, the deposition solution is deionized water, the size of titanium carbide colloid is 63nm, and finally the micro-doped one-dimensional high-temperature-resistant film composite coating with the thickness of 7 mu m of the titanium carbide film is obtained.
The performance parameters of the film composite coatings prepared in examples 5-10 are shown in Table 2:
TABLE 2
Figure BDA0002201045720000111
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (10)

1. The preparation method of the one-dimensional component high-temperature-resistant film composite coating is characterized by comprising the following steps of:
1) uniformly mixing the granulated steel bond hard alloy powder and the zirconium dioxide short fibers with an adhesive, placing the mixture in a reducing gas flame power spraying device, and spraying the surface of 45# steel to obtain a fiber reinforced steel bond hard alloy coating, wherein the mass percentage of the granulated steel bond hard alloy powder to the zirconium dioxide short fibers is (99.89-99.96): (0.04 to 0.11);
2) and (3) roughly grinding the surface of the coating, and depositing a titanium carbide film on the surface of the coating by using a pulse current deposition technology to finally obtain the micro-doped one-dimensional component high-temperature-resistant film layer composite coating.
2. The preparation method of the one-dimensional component high temperature resistant film composite coating as claimed in claim 1, wherein the average grain size of the granulated steel bond hard alloy powder is 40-70 μm, and the Rockwell hardness is 56-62.
3. The method for preparing the one-dimensional high temperature resistant composite coating of the film as claimed in claim 1, wherein the zirconium dioxide short fiber has a cross-sectional diameter of 150 to 210nm and an average length of 3.3 μm.
4. The method for preparing the one-dimensional component high-temperature-resistant film composite coating of claim 1, wherein the adhesive is 15mol/L PVA aqueous solution, and the amount of the adhesive is 3-8 g per kg of mixed powder.
5. The preparation method of the one-dimensional component high temperature resistant film composite coating according to claim 1, wherein the reducing gas flame power spraying device comprises a natural air powder feeding central channel, a preheating gas channel, a medium temperature combustion-supporting air channel, a reducing burner and a vortex chamber, wherein the natural air speed is 3-7 m/s, the preheating gas temperature and flow rate are 50-70 ℃ and 120-170 ml/s, and the medium temperature combustion-supporting air temperature and flow rate are 230-270 ℃ and 140-176 m/s.
6. The preparation method of the one-dimensional component high-temperature-resistant film composite coating according to claim 1, wherein the thickness of the obtained fiber reinforced steel bonded hard alloy coating is 0.1-0.4 mm.
7. The preparation method of the one-dimensional component high-temperature-resistant film composite coating according to claim 1, wherein silicon carbide cutting elements are adopted for rough grinding of the surface of the coating, and the grinding depth is 1-3 μm.
8. The preparation method of the one-dimensional component high temperature resistant film composite coating of claim 1, wherein the pulse current deposition technology has a pulse current period of 2-5 milliseconds, the deposition solution is deionized water, and the size of titanium carbide colloid is 34-63 nm.
9. The preparation method of the one-dimensional component high-temperature-resistant film layer composite coating as claimed in claim 1, wherein the thickness of the obtained titanium carbide film is 3-7 μm.
10. The method for preparing the one-dimensional high temperature resistant film composite coating as claimed in any one of claims 1 to 9, wherein the surface hardness of the prepared film composite coating is greater than or equal to 55HRC, the interface bonding strength is greater than or equal to 170MPa, the corrosion rate of 350 ℃ concentrated hydrochloric acid solution is less than or equal to 0.12 micron/hour, and the corrosion rate of 350 ℃ sodium hydroxide solution is less than or equal to 0.15 micron/hour.
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Publication number Priority date Publication date Assignee Title
WO1998014628A1 (en) * 1996-10-02 1998-04-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Coated wear resisting parts for internal combustion engines, specially piston rings, and method for their production
WO2009112368A2 (en) * 2008-03-04 2009-09-17 Coatec Gesellschaft für Oberflächenveredelung mbH Coating of a body made of steel or crp material and method for producing such a coating
CN103552341A (en) * 2013-10-27 2014-02-05 何鹏 Coating structure of machine tool
CN103834893A (en) * 2014-03-05 2014-06-04 华北水利水电大学 Method for enhancing blade surface of metal hydraulic turbine runner by combining electrical sparkle deposition and plasma cladding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014628A1 (en) * 1996-10-02 1998-04-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Coated wear resisting parts for internal combustion engines, specially piston rings, and method for their production
WO2009112368A2 (en) * 2008-03-04 2009-09-17 Coatec Gesellschaft für Oberflächenveredelung mbH Coating of a body made of steel or crp material and method for producing such a coating
CN103552341A (en) * 2013-10-27 2014-02-05 何鹏 Coating structure of machine tool
CN103834893A (en) * 2014-03-05 2014-06-04 华北水利水电大学 Method for enhancing blade surface of metal hydraulic turbine runner by combining electrical sparkle deposition and plasma cladding

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