CN111172537B - Preparation method of stainless steel surface coating with excellent wear resistance and corrosion resistance - Google Patents
Preparation method of stainless steel surface coating with excellent wear resistance and corrosion resistance Download PDFInfo
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- CN111172537B CN111172537B CN202010034534.1A CN202010034534A CN111172537B CN 111172537 B CN111172537 B CN 111172537B CN 202010034534 A CN202010034534 A CN 202010034534A CN 111172537 B CN111172537 B CN 111172537B
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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
- C23C28/345—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 oxide layer
- C23C28/3455—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 oxide layer with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/026—Anodisation with spark discharge
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
Abstract
A process for preparing the surface coating of stainless steel with excellent antiwear and anticorrosion performance includes such steps as preparing Al and Al2O3Preparing an aluminum substrate layer from raw materials, and generating Al on the aluminum substrate layer in situ by using a bipolar micro-arc oxidation process2O3A ceramic layer; has extremely high corrosion resistance (neutral salt spray is not corroded for 2000h, and artificial seawater soaking is not corroded for 2000 h) and excellent wear resistance (7mg/h, MM200 friction wear test, load is 8 kg).
Description
The invention is a divisional application with patent application number 201711180608.7 entitled composite coating on surface of steel material and preparation method thereof.
Technical Field
The invention relates to a preparation method of a stainless steel surface composite coating.
Background
Under the environment of high heat and humidity, high salt fog and high chloride ion concentration of the ocean, the corrosion of steel materials is extremely serious, and the corrosion phenomenon is more serious because various moving components made of steel materials are subjected to friction and wear for a long time. The main measures for protecting the corrosion-resistant surface of steel members in marine climate are painting, electroplating/chemical plating, thermal spraying, cold spraying, oil coating, etc. Painting is the most common marine climate corrosion resistant surface protection measure at the present stage, but as the moving parts are in a friction working condition, the paint surface is easy to fall off, scratch, wear and the like, and the corrosion resistance of the component is seriously influenced; although the technologies of chromium plating, composite plating Ni-SiC and the like have good wear resistance, the corrosion resistance requirement under the marine climate is difficult to meet, the technologies of cadmium plating and the like have good corrosion resistance, but cadmium is a highly carcinogenic substance, the manufacturing and maintenance process has great harm to personnel and environment, and the cadmium plating layer has the serious defects of softness, no wear resistance, high temperature, easy pulverization, sensitivity to hydrogen embrittlement and the like; the coating prepared by adopting the thermal spraying processes such as plasma spraying, supersonic flame spraying, electric arc spraying and the like has obvious wear-resisting effect, but has limited corrosion resistance due to higher porosity; the cold spraying aluminum coating has excellent corrosion resistance, but is soft and not wear-resistant, and is difficult to be directly used for the surface corrosion-resistant and wear-resistant protection of the moving component. The oiling is a simple method for solving the problems of corrosion resistance and wear resistance of the moving component, but the regular oiling maintenance is needed, so that the guarantee is time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to provide a preparation method of a stainless steel surface coating with excellent wear resistance and corrosion resistance, which comprises the following steps:
preparing an aluminum substrate layer: the composition of the aluminum base layer comprises aluminum and Al2O3；
(1) Degreasing a 304 stainless steel sample in an alkaline degreasing agent at 50-80 ℃ for about 15 min; rinsing with tap water for 50s, and rinsing with running water for 20 s; drying by compressed air; carrying out sand blasting treatment on the surface of the sample, wherein 120-mesh brown corundum sand is adopted, and the sand blasting pressure is 0.70-0.95 MPa;
(2) according to the following steps of 9: 1, putting pure aluminum powder and aluminum oxide particles into a mixer, and uniformly mixing for 30 min; putting the mixed powder into a baking oven at 50 ℃ and baking for 80 min; pouring the baked mixed powder into a charging barrel of cold spraying equipment;
(3) fixing a sample on a sample table, and adjusting the distance between a spray gun and the sample to 15 mm; weaving a movement track of the spray gun, controlling a spraying angle to be 70-90 degrees, and setting the moving speed of the spray gun to be 5 mm/s;
(4) starting cold spraying equipment, adjusting the air pressure to 0.5MPa, setting the temperature of spraying gas to 600 ℃, and spraying according to a preset track, wherein the spraying times are 1 time, and the thickness of the aluminum substrate layer is 20-30 mu m;
(5) polishing the aluminum substrate coating, wherein the thickness of the polished coating is 50 mu m, and the surface roughness Ra1.6 mu m is about;
(II) Al2O3Preparing a ceramic layer: in-situ generation of Al on an aluminum substrate layer by adopting a bipolar micro-arc oxidation process2O3A ceramic layer;
(1) firmly connecting the sample coated with the aluminum substrate layer with the power supply anode of the micro-arc oxidation equipment;
(2) immersing a sample in electrolyte, wherein the electrolyte comprises 15g/L of sodium phosphate, 5g/L of sodium tetraborate, 5g/L of sodium metavanadate and the balance of deionized water;
(3) starting micro-arc oxidation equipment, wherein the process parameters are as follows: the positive current density is 6A/dm2, the negative current density is 1A/dm2, the frequency is 800Hz, the duty ratio is 20 percent, the oxidation time is 10min, and the micro-arc oxidized Al prepared by the process2O3The thickness of the ceramic layer is 5-10 mu m;
(4) and directly immersing the micro-arc oxidized sample into flowing cold water for cleaning for 5min, and drying the cleaned sample in an oven at 80 ℃.
Preferably, the content of the pure aluminum powder in the mixed powder is 50 wt% -95 wt%, and the granularity of the pure aluminum powder is 15-75 μm; the content of the alumina powder is 5 wt% -50 wt%, and the particle size of the alumina is 45-90 mu m.
The invention aims to provide Al-Al with high corrosion resistance and high wear resistance suitable for the surface of a steel material2O3A method for preparing a composite coating which can solve the problemThe wear resistance and the corrosion resistance in the prior art are difficult to be considered simultaneously. The composite coating prepared by the preparation method provided by the invention has the advantages of high hardness, good corrosion resistance, good binding force, no pollution and the like, and is particularly suitable for wear-resistant and corrosion-resistant protection of steel moving members in marine high-humidity high-heat and high-salt-spray environments.
The invention has the following beneficial effects:
(1) cold spraying aluminum coating with good corrosion resistance but soft quality and micro-arc oxidation Al2O3The coating has good wear resistance but high porosity, and the invention combines the characteristics of the coating and the coating to prepare the high-corrosion-resistance high-wear-resistance Al-Al alloy2O3The composite coating is an aluminum substrate layer and Al2O3A combination of ceramic layers. The aluminum substrate layer is prepared by a cold spraying method, and has high bonding strength (38MPa) and extremely low porosity (less than or equal to 1%); al (Al)2O3The ceramic layer is generated in situ on the aluminum substrate layer by adopting a bipolar micro-arc oxidation method, has strong binding force and high hardness (1200 HV).
(2) Al-Al prepared by the invention2O3The composite coating comprises a cold-sprayed aluminum coating and micro-arc oxidized Al2O3The coating has the advantages of extremely high corrosion resistance (no corrosion in neutral salt spray for 2000h and no corrosion in artificial seawater soaking for 2000 h) and excellent wear resistance (7mg/h, MM200 friction wear test and load of 8kg), and is particularly suitable for solving the corrosion and wear resistance problems of steel moving components in high-humidity and high-heat, high-salt spray and high-chloride ion concentration marine climate.
(3) In the invention, the aluminum oxide particles with proper proportion are added into the pure aluminum powder during cold spraying, which is beneficial to improving the bonding force and hardness of the coating and improving the Al of the aluminum substrate layer2O3The ceramic layer has a supporting function.
(4)Al- Al2O3The preparation process of the composite coating has no use of harmful substances, no pollution to the environment, no toxic wastewater and no pungent smell.
Detailed Description
Hereinafter, the present disclosure will be described more fully with examples. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit various embodiments of the disclosure to the specific implementations disclosed herein
The intention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of various embodiments of the disclosure.
Hereinafter, the term "includes" or "may include" used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present disclosure, the terms "comprising," "having," and their derivatives, are intended to be only representative of the particular features, integers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to one or more other features, integers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the disclosure, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined in various embodiments of the present disclosure.
Example 1
Materials: q235 Steel-sample
Preparation of (mono) aluminum substrate
(1) Degreasing the sample in an alkaline degreasing agent at 60-70 ℃ for 10 min; rinsing with tap water for 30s, and rinsing with running water for 30 s; drying by compressed air; and carrying out sand blasting treatment on the surface of the sample, wherein the sand blasting pressure is 0.65-0.8 MPa by adopting 120-mesh brown corundum sand.
(2) According to the following steps of 4: 1, putting pure aluminum powder and aluminum oxide particles into a mixer, and uniformly mixing for 30 min; putting the mixed powder into an oven at 80 ℃ and baking for 60 min; and pouring the baked mixed powder into a charging barrel of cold spraying equipment.
(3) Fixing a sample on a sample table, and adjusting the distance between a spray gun and the sample to 10 mm; weaving the movement track of the spray gun, controlling the spraying angle to be 80-90 degrees, and setting the moving speed of the spray gun to be 12 mm/s.
(4) And starting cold spraying equipment, adjusting the air pressure to 0.7MPa, setting the temperature of spraying gas to 450 ℃, and spraying according to a preset track, wherein the spraying times are 3 times, and the thickness of the aluminum substrate layer is 100-120 mu m.
(5) And polishing the aluminum base coating, wherein the thickness of the polished coating is 80-100 mu m, and the surface roughness Ra0.8 mu m.
(II) Al2O3Preparation of ceramic layer
(1) And firmly connecting the sample coated with the aluminum substrate layer with the anode of the power supply of the micro-arc oxidation equipment.
(2) Immersing the sample in electrolyte, wherein the electrolyte comprises 21g/L of sodium phosphate, 10g/L of sodium tetraborate, 1g/L of sodium metavanadate and the balance of deionized water.
(7) Starting micro-arc oxidation equipment, wherein the process parameters are as follows: positive current density 4A/dm2, negative current density 0.5A/dm2, frequency 900Hz, duty ratio 30%, oxidation time 40 min. Micro-arc oxidized Al prepared by adopting the process2O3The thickness of the ceramic layer is 25-30 μm.
(8) And directly immersing the micro-arc oxidized sample into flowing cold water for cleaning for 5min, and drying the cleaned sample in an oven at 80 ℃.
Al-Al prepared by the present example2O3The composite coating is gray in appearance, the bonding strength is 40MPa, the surface micro Vickers hardness can reach 1500HV, the neutral salt spray test is free of corrosion for 2000h, the artificial seawater test is free of corrosion for 2000h, and the abrasion loss of the MM200 friction abrasion test under the load of 8kg is 6 mg/h.
Example 2
Materials: 304 stainless steel sample
Preparation of (mono) aluminum substrate
(1) Degreasing the sample in an alkaline degreasing agent at 50-80 ℃ for 15 min; rinsing with tap water for 50s, and rinsing with running water for 20 s; drying by compressed air; and carrying out sand blasting treatment on the surface of the sample, wherein the sand blasting pressure is 0.70-0.95 MPa by adopting 120-mesh brown corundum sand.
(2) According to the following steps of 9: 1, putting pure aluminum powder and aluminum oxide particles into a mixer, and uniformly mixing for 30 min; putting the mixed powder into a baking oven at 50 ℃ and baking for 80 min; and pouring the baked mixed powder into a charging barrel of cold spraying equipment.
(3) Fixing a sample on a sample table, and adjusting the distance between a spray gun and the sample to 15 mm; weaving the movement track of the spray gun, controlling the spraying angle at 70-90 degrees, and setting the moving speed of the spray gun to be 5 mm/s.
(4) And starting cold spraying equipment, adjusting the air pressure to 0.5MPa, setting the temperature of spraying gas to 600 ℃, and spraying according to a preset track, wherein the spraying frequency is 1 time, and the thickness of the aluminum substrate layer is 20-30 mu m.
(5) The aluminum substrate coating was polished to a thickness of 50 μm and a surface roughness of Ra1.6. mu.m.
(II) Al2O3Preparation of ceramic layer
(1) And firmly connecting the sample coated with the aluminum substrate layer with the anode of the power supply of the micro-arc oxidation equipment.
(2) Immersing a sample in electrolyte, wherein the electrolyte comprises 15g/L of sodium phosphate, 5g/L of sodium tetraborate, 5g/L of sodium metavanadate and the balance of deionized water.
(7) Starting micro-arc oxidation equipment, wherein the process parameters are as follows: the positive current density is 6A/dm2, the negative current density is 1A/dm2, the frequency is 800Hz, the duty ratio is 20 percent, and the oxidation time is 10 min. Micro-arc oxidized Al prepared by adopting the process2O3The thickness of the ceramic layer is 5-10 μm.
(8) And directly immersing the micro-arc oxidized sample into flowing cold water for cleaning for 5min, and drying the cleaned sample in an oven at 80 ℃.
Al-Al prepared by the present example2O3The appearance of the composite coating is gray, the bonding strength is 38MPa, the surface micro Vickers hardness can reach 1200HV, the neutral salt spray test is 2000h without corrosion, the artificial seawater test is 2000h without corrosion, and the load is 8kg
The abrasion loss in the MM200 frictional abrasion test was 7 mg/h.
Example 3
Materials: 40Cr Steel sample
Preparation of (mono) aluminum substrate
(1) Degreasing the sample in an alkaline degreasing agent at 40-60 ℃ for 20 min; rinsing with tap water for 30s and flowing water for 50 s; drying by compressed air; and carrying out sand blasting treatment on the surface of the sample, wherein the sand blasting pressure is 0.60-0.85 MPa by adopting 120-mesh brown corundum sand.
(2) According to the following steps: 1, putting pure aluminum powder and aluminum oxide particles into a mixer, and uniformly mixing for 30 min; putting the mixed powder into a baking oven at 90 ℃ for baking for 60 min; and pouring the baked mixed powder into a charging barrel of cold spraying equipment.
(3) Fixing a sample on a sample table, and adjusting the distance between a spray gun and the sample to be 30 mm; the movement track of the spray gun is well woven, the spraying angle is controlled at 90 degrees, and the moving speed of the spray gun is well set to be 20 mm/s.
(4) Starting cold spraying equipment, adjusting the air pressure to 1.2MPa, setting the temperature of spraying gas to be 200 ℃, and spraying according to a preset track, wherein the spraying times are 5 times, and the thickness of the aluminum substrate layer is 300 mu m.
(5) And polishing the aluminum base coating, wherein the thickness of the polished coating is 260-280 mu m, and the surface roughness Ra0.8 mu m.
(II) Al2O3Preparation of ceramic layer
(1) And firmly connecting the sample coated with the aluminum substrate layer with the anode of the power supply of the micro-arc oxidation equipment.
(2) Immersing a sample in electrolyte, wherein the electrolyte comprises 35g/L of sodium phosphate, 25g/L of sodium tetraborate, 1g/L of sodium metavanadate and the balance of deionized water.
(7) Starting micro-arc oxidation equipment, wherein the process parameters are as follows: positive current density 8A/dm2, negative current density 1A/dm2, frequency 1500Hz, duty cycle 40%, oxidation time 120 min. Micro-arc oxidized Al prepared by adopting the process2O3The thickness of the ceramic layer is 90-100 μm.
(8) And directly immersing the micro-arc oxidized sample into flowing cold water for cleaning for 10min, and drying the cleaned sample in an oven at 70 ℃.
Al-Al prepared by the present example2O3The appearance of the composite coating is gray, the bonding strength is 36MPa, the surface micro Vickers hardness can reach 1350HV, the neutral salt spray test is 2000h without corrosion, the artificial seawater test is 2000h without corrosion, and the abrasion loss of the MM200 friction abrasion test under the load of 8kg is6mg/h。
Claims (3)
1. The preparation method of the stainless steel surface coating with excellent wear resistance and corrosion resistance is characterized by comprising the following steps:
preparing an aluminum substrate layer: the composition of the aluminum base layer comprises aluminum and Al2O3；
(1) Degreasing a 304 stainless steel sample in an alkaline degreasing agent at 50-80 ℃ for 15 min; rinsing with tap water for 50s, and rinsing with running water for 20 s; drying by compressed air; carrying out sand blasting treatment on the surface of the sample, wherein 120-mesh brown corundum sand is adopted, and the sand blasting pressure is 0.70-0.95 MPa;
(2) according to the mass ratio of 9: 1, putting pure aluminum powder and aluminum oxide particles into a mixer, and uniformly mixing for 30 min; putting the mixed powder into a baking oven at 50 ℃ and baking for 80 min; pouring the baked mixed powder into a charging barrel of cold spraying equipment;
(3) fixing a sample on a sample table, and adjusting the distance between a spray gun and the sample to 15 mm; weaving a movement track of the spray gun, controlling a spraying angle to be 70-90 degrees, and setting the moving speed of the spray gun to be 5 mm/s;
(4) starting cold spraying equipment, adjusting the air pressure to 0.5MPa, setting the temperature of spraying gas to 600 ℃, and spraying according to a preset track, wherein the spraying times are 1 time, and the thickness of the aluminum substrate layer is 20-30 mu m;
(5) polishing the aluminum substrate coating, wherein the thickness of the polished coating is 50 mu m, and the surface roughness Ra1.6 mu m;
(II) Al2O3Preparing a ceramic layer: in-situ generation of Al on an aluminum substrate layer by adopting a bipolar micro-arc oxidation process2O3A ceramic layer;
(1) firmly connecting the sample coated with the aluminum substrate layer with the power supply anode of the micro-arc oxidation equipment;
(2) immersing a sample in electrolyte, wherein the electrolyte comprises 15g/L of sodium phosphate, 5g/L of sodium tetraborate, 5g/L of sodium metavanadate and the balance of deionized water;
(3) starting micro-arc oxidation equipment, wherein the process parameters are as follows: positive current density 6A/dm2Negative current density 1A/dm2Frequency of 800Hz, duty ratio of 20 percent and oxidation time of 10min, and the micro-arc oxidized Al prepared by the process2O3The thickness of the ceramic layer is 5-10 mu m;
(4) and directly immersing the micro-arc oxidized sample into flowing cold water for cleaning for 5min, and drying the cleaned sample in an oven at 80 ℃.
2. The method for preparing a stainless steel surface coating with excellent wear and corrosion resistance of claim 1, wherein the method comprises the following steps: the content of pure aluminum powder in the mixed powder is 50 wt% -95 wt%, and the granularity of the pure aluminum powder is 15-75 mu m; the content of the alumina particles is 5 wt% -50 wt%, and the particle size of the alumina particles is 45-90 mu m.
3. The stainless steel surface coating with excellent wear resistance and corrosion resistance is characterized in that: prepared by the method of claim 1.
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| CN111172526A (en) * | 2020-02-20 | 2020-05-19 | 兰州理工大学 | Method for in-situ ceramic coating on surface of low-pressure cold-sprayed Al-based coating |
| CN113881258B (en) * | 2021-11-11 | 2022-10-18 | 中国兵器工业第五九研究所 | Aluminum alloy heat-insulation and scouring-resistant composite coating and preparation method thereof |
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| CN111172537A (en) | 2020-05-19 |
| CN107904590B (en) | 2019-12-17 |
| CN107904590A (en) | 2018-04-13 |
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