CN113025941A - Cr3C 2-based wear-resistant coating and supersonic flame spraying preparation method and application - Google Patents

Cr3C 2-based wear-resistant coating and supersonic flame spraying preparation method and application Download PDF

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CN113025941A
CN113025941A CN202110238780.3A CN202110238780A CN113025941A CN 113025941 A CN113025941 A CN 113025941A CN 202110238780 A CN202110238780 A CN 202110238780A CN 113025941 A CN113025941 A CN 113025941A
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wear
resistant coating
coating
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supersonic flame
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李燕乐
张兴艺
李方义
鹿海洋
杜际雨
冉学举
戚小霞
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Shandong University
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Shandong University
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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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention belongs to the field of surface repair and reinforcement of metal structure parts, and relates to Cr3C2The formula of the base wear-resistant coating and the preparation method of the supersonic flame spraying comprise the following main components: calculated by mass percent, 68-72 percent of Cr3C2(particle size 1-10 μm), 17-18% NiCr, 10-15% TiC (particle size 10-100 nm). The invention provides Cr3C2The formula of the wear-resistant coating contains nano TiC hard phase particles and micron Cr3C2The particles jointly form nano and micron hard phase composite reinforced powder, so that the microstructure and the structure of the coating are improved, and the coating is pinned. While synergistically hindering the propagation path of the crack. In addition, the nano TiC hard phase particles not only strengthen the metal structure in the coating, but also inhibit Cr3C2Flaking off of the particles. The invention adopts a supersonic flame spraying preparation process toThe surface heat influence of the part is small, nano and micron hard particles are distributed in the coating, the microstructure and the structure are excellent, the decarburization rate is low, the wear resistance is good, the operation is convenient, the preparation cost is low, and the method is suitable for wide popularization and application.

Description

Cr3C 2-based wear-resistant coating and supersonic flame spraying preparation method and application
Technical Field
The invention belongs to the field of surface repair and reinforcement of metal structure parts, and particularly relates to Cr3C2A base wear-resistant coating formula and a supersonic flame spraying preparation method.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Cr3C2Based on wear-resistant coatings of Cr3C2The NiCr coating is a representative coating and is widely applied to surface repair and strengthening of metal structural parts in a friction and wear service environment. However, with the continuous severer service environment, the requirement on the wear resistance of the coating is continuously improved, and the conventional Cr3C2The service performance of the NiCr coating cannot meet the actual requirement, so that the accident rate is increased. Therefore, for Cr3C2The enhancement and modification of the base wear-resistant coating are of great significance in developing a new coating formula.
At present, for Cr3C2The research on the enhancement and modification of the base wear-resistant coating is less, and particularly, the research on the aspect of enhancing and modifying by adding nano hard phase particles is rare. Thermal spraying techniques include electric arc spraying, explosion spraying, plasma spraying, supersonic flame spraying, etc., each having its own characteristics, and the coating powder materials to which the spraying is applied are also different.
Disclosure of Invention
The invention aims to improve the conventional Cr content3C2Providing a Cr based wear-resistance coating3C2Formula of base wear-resistant coating and supersonic flame sprayingThe preparation method is convenient to operate and excellent in performance.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a Cr3C2The wear-resistant coating is prepared from the following raw materials in percentage by mass: 68-72% Cr3C217-18% of NiCr and 10-15% of TiC, wherein the sum of the mass percentages of the raw materials is 100%;
wherein, Cr3C2Is micron-sized and TiC is nano-sized.
The research of the invention finds that: cr (chromium) component3C2The formula of the wear-resistant coating contains nano TiC hard phase particles and micron Cr3C2The particles jointly form nano and micron hard particle composite reinforced powder, the microstructure of the coating is improved, the coating is pinned, and the propagation path of cracks is synergistically hindered. In addition, the nano TiC hard phase particles not only strengthen the metal structure in the coating, but also inhibit Cr3C2Flaking off of the particles. The composite organization structure of the nano and micron hard particles ensures that the coating has excellent wear resistance and good crack resistance.
In a second aspect of the present invention, there is provided a Cr3C2The supersonic flame spraying preparation method of the wear-resistant coating comprises the following steps:
mixing Cr3C2- (20-25 wt%) NiCr powder and TiC, uniformly mixing, ball-milling by a wet method, and drying to obtain wear-resistant metal ceramic powder;
carrying out oil removal and rust removal on the surface of the part, and carrying out sand blasting and coarsening treatment on the surface of the part to obtain a pretreated part;
spraying wear-resistant metal ceramic powder on the surface of the pretreated part by adopting a supersonic flame spraying method to form Cr3C2A base wear resistant coating;
adjusted to be sprayed with Cr3C2And (4) obtaining the size and the roughness of the part with the wear-resistant coating.
The research finds that: the supersonic flame spraying is Cr spraying3C2The best thermal spraying process of the isocarbide-based coating has high speed (beneficial to the bonding strength of the coating) and moderate temperature (does not melt Cr)3C2Particles, so that the decarburization rate of the coating is low, and simultaneously, the uniform distribution of Cr in the coating is maintained3C2Structure of hard phase particles), the invention prepares Cr by supersonic flame spraying technology3C2The base wear-resistant coating has little heat influence on the surface of the part, does not basically influence the performance of the part, is distributed with nano and micron hard particles, has excellent microstructure and structure, high wear resistance, good bonding strength, convenient operation, low preparation cost and wide popularization and application.
In a third aspect of the present invention, there is provided any one of the above Cr3C2The wear-resistant coating is applied to the fields of military industry, aerospace and nuclear energy.
Because of the Cr prepared by the invention3C2The wear-resistant coating has excellent wear resistance and good toughness and crack resistance, so that the wear-resistant coating is expected to be widely applied to the fields of military industry, aerospace and nuclear energy.
The invention has the beneficial effects that:
(1) the invention provides Cr3C2The formula of the wear-resistant coating contains nano TiC hard phase particles and micron Cr3C2The hard phase particles jointly form a nano-micron and micron hard phase composite reinforced structure, so that the microstructure and the structure of the coating are improved, the coating is pinned, and the propagation path of cracks is synergistically hindered. In addition, the nano TiC hard phase particles not only strengthen the metal structure in the coating, but also inhibit Cr3C2Flaking off of the particles. TiC has high hardness superior to Cr3C2And service temperature and Cr3C2Equivalent to Cr3C2The composite structure of the nano and micron hard particles enables the coating to have excellent wear resistance and good crack resistance.
(2) The invention adopts the supersonic flame spraying preparation process, has little heat influence on the surface of the part, basically does not influence the performance of the part, and the coating is distributed with nano and micron hard particles, and has excellent microstructure and structure, low decarburization rate, compact structure and good bonding strength.
(3) The research of the invention finds that: cr can be formed in the composite coating by adopting supersonic flame spraying3C2The microstructure of the particles and TiC particles in staggered distribution is beneficial to wear resistance and hinders crack propagation.
(4) The preparation method is simple, convenient to operate, high in practicability and easy to popularize.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 shows Cr in example 1 of the present invention3C2SEM image of base wear-resistant coating powder;
FIG. 2 shows Cr in example 1 of the present invention3C2High-power SEM image of the base wear-resistant coating powder;
FIG. 3 shows Cr in example 1 of the present invention3C2Base wear-resistant coating SEM picture;
FIG. 4 shows Cr without adding nano TiC in example 1 of the present invention3C2SEM images of the base coating after abrasion;
FIG. 5 shows Cr added with 12% of nano TiC in example 1 of the present invention3C2SEM images of the base coating after abrasion;
FIG. 6 shows Cr with nano TiC added in example 1 of the present invention3C2Wear scar cross section curve after the base coat is worn.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Cr (chromium)3C2The formula of the base wear-resistant powder comprises the following main components: calculated by mass percent, 68-72 percent of Cr3C2(particle size 1-10 μm), 17-18% NiCr, 10-15% TiC (particle size 10-100 nm).
The preparation method of the coating by supersonic flame spraying comprises the following steps:
the method comprises the following steps: preparation of wear-resistant metal ceramic powder
1) Taking commercial Cr3C2- (20 wt%) NiCr powder, the granularity is 15-45 μm, the powder is put into a beaker, the TiC (the granularity is 10-100nm) with the above proportion is added, the mixture is stirred by a stirring rod and fully mixed, the powder is weighed, and then the powder is put into a ball milling tank.
2) Taking corundum balls with different diameters, and adding the corundum balls into a ball milling tank according to the powder mass weighed in the step 1) and a certain ball powder mass ratio.
3) And adding absolute ethyl alcohol into the ball milling tank, wherein the liquid level is required to be over the corundum balls and the powder.
4) Setting the ball mill to rotate at a high speed for a certain time to perform ball milling and mixing.
5) And (3) respectively carrying out high-temperature vacuum drying on the ball-milled composite powder, filtering by using a screen, screening out powder with the particle size of 15-45 mu m, and preparing for preparing a coating by subsequent supersonic flame spraying.
Step two: pretreatment of the surface of a part
1) And (3) putting the part into an ultrasonic cleaning machine, adding absolute ethyl alcohol, and removing oil and rust on the surface of the part.
2) And carrying out surface sand blasting roughening treatment on the part in a sand blasting machine.
Step three: coating prepared by supersonic flame spraying
1) The coating is prepared by adopting supersonic flame spraying equipment, and the following process parameters, fuel flow, oxygen flow, carrier gas flow, powder feeding speed, spray gun moving speed, single-channel offset and spraying distance are respectively set.
2) Furthermore, in order to reduce the thermal influence on the base material, intermittent cooling is arranged in the spraying process, and the temperature of the sample is strictly controlled below 200 ℃. All coating samples were prepared by spraying multiple times simultaneously, with coating thicknesses of 100-.
Step four: machined part size and roughness
And machining the surface of the part with the coating prepared by supersonic flame spraying to meet the requirements of specific size and roughness.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1:
the method comprises the following steps: preparation of wear-resistant metal ceramic powder
1) Taking commercial Cr3C2- (20 wt%) NiCr powder, 15-45 μm in particle size, put into 5 beakers in equal amount, add 0%, 3%, 6%, 12%, 20% TiC (average particle size 40nm) respectively, stir with a stirring rod, mix thoroughly, weigh the powder mass, and put into 5 ball-milling pots respectively.
2) Taking corundum balls (10mm and 5mm in different diameters, and the mass ratio is 3:2), weighing the powder according to the step 1), and mixing the corundum balls and the powder according to the ball powder mass ratio of 2: 1, adding corundum balls into a ball milling tank.
3) And adding absolute ethyl alcohol into the ball milling tank, wherein the liquid level is required to be over the corundum balls and the powder.
4) The ball mill was set to rotate at high speed (180rpm) for 10min for ball milling and mixing.
5) And (3) respectively carrying out high-temperature (120 ℃) vacuum drying on the ball-milled composite powder for 3h, carrying out screen filtering treatment, screening out powder with the particle size of 15-45 mu m, and preparing for preparing a coating for subsequent supersonic flame spraying, wherein the composite powder added with 12% of nano TiC has slightly poor flowability and can be used for a spraying test, and the composite powder added with 20% of nano TiC has extremely poor flowability and cannot be used as a spraying material, so that the composite powder is discarded.
Step two: pretreatment of the surface of a part
1) And (3) putting the part into an ultrasonic cleaning machine, adding absolute ethyl alcohol, and removing oil and rust on the surface of the part.
2) And carrying out surface sand blasting and coarsening treatment on the part in a sand blasting machine by adopting 20-mesh brown corundum.
Step three: coating prepared by supersonic flame spraying
1) The coating is prepared by adopting supersonic flame spraying equipment, and one preferable technological parameter is as follows: the flow rate of fuel oil is 22.5L/h, the flow rate of oxygen is 1100L/min, the flow rate of carrier gas is 650L/h, the powder feeding speed is 2.5r/min, the moving speed of a spray gun is 420mm/s, the single-channel offset is 5mm, and the spraying distance is 330 mm.
2) Intermittent cooling is set in the spraying process, and the temperature of the sample is strictly controlled below 200 ℃. All coating samples were prepared by spraying 10 times simultaneously, the coating thickness being 300. mu.m.
3) The ball-disk dry sliding circumferential wear test was performed on four polished coated surfaces with 0%, 3%, 6%, 12% TiC according to ASTM G99 standard using the frictional wear test equipment UMT-2. The grinding piece is an alumina ball with the diameter of 10mm, the load is 10N, the rotating speed is 420r/min, the friction and wear radius is 7mm, and the friction time is 1 h. The test results show that the cross-sectional areas of the grinding marks of the four coatings (TiC of 0%, 3%, 6% and 12%) are 2881.34 mu m respectively2，3655.55μm2，2520.34μm2，1207.77μm2Namely, the wear rate of the composite coating added with 12 percent of nano TiC is the lowest, and the micro wear appearance shows that the composite coating has the least micro cracks and has the best wear resistance.
Step four: machined part size and roughness
And machining the surface of the part with the coating prepared by supersonic flame spraying to meet the requirements of specific size and roughness.
Example 2:
the method comprises the following steps: preparation of wear-resistant metal ceramic powder
1) Taking commercial Cr3C2-(20wt％) NiCr powder with the particle size of 15-45 mu m is placed into a beaker, 12 percent of TiC (the average particle size is 40nm) is added, the mixture is stirred by a stirring rod and fully mixed, and the powder is placed into a ball milling tank after the weight of the powder is weighed.
2) Taking corundum balls (10mm and 5mm in different diameters, and the mass ratio is 3:2), weighing the powder according to the step 1), and mixing the corundum balls and the powder according to the ball powder mass ratio of 2: 1, adding corundum balls into a ball milling tank.
3) And adding absolute ethyl alcohol into the ball milling tank, wherein the liquid level is required to be over the corundum balls and the powder.
4) The ball mill was set to rotate at high speed (180rpm) for 10min for ball milling and mixing.
5) And (3) respectively carrying out high-temperature (120 ℃) vacuum drying on the ball-milled composite powder for 3h, carrying out filtering treatment by using a screen, and screening out powder with the particle size of 15-45 mu m to prepare for preparing a coating by subsequent supersonic flame spraying.
Step two: pretreatment of the surface of a part
1) And (3) putting the part into an ultrasonic cleaning machine, adding absolute ethyl alcohol, and removing oil and rust on the surface of the part.
2) And carrying out surface sand blasting and coarsening treatment on the part in a sand blasting machine by adopting 20-mesh brown corundum.
Step three: coating prepared by supersonic flame spraying
1) The coating is prepared by adopting supersonic flame spraying equipment, and the technological parameters are as follows: the flow rate of fuel oil is 25L/h, the flow rate of oxygen is 1200L/min, the flow rate of carrier gas is 700L/h, the powder feeding speed is 3r/min, the moving speed of a spray gun is 450mm/s, the single offset is 6mm, and the spraying distance is 350 mm.
2) Intermittent cooling is set in the spraying process, and the temperature of the sample is strictly controlled below 200 ℃. All coating samples were prepared by spraying 10 times simultaneously, the coating thickness being 300. mu.m.
3) The polished coated surface was subjected to a ball-and-disk dry sliding circumferential wear test according to ASTM G99 using a frictional wear test apparatus UMT-2. The grinding piece is an alumina ball with the diameter of 10mm, the load is 10N, the rotating speed is 420r/min, the friction and wear radius is 7mm, and the friction time is 1 h. The test result shows that the wear rate of the composite coating is low, and the micro-wear appearance shows that the composite coating has less micro-cracks and has the best wear resistance.
Step four: machined part size and roughness
And machining the surface of the part with the coating prepared by supersonic flame spraying to meet the requirements of specific size and roughness.
Example 3:
the method comprises the following steps: preparation of wear-resistant metal ceramic powder
1) Taking commercial Cr3C2- (20 wt%) NiCr powder, particle size 15-45 μm, placing in a beaker, adding 12% TiC (average particle size 40nm), stirring with a stirring rod, mixing thoroughly, weighing the powder mass, and placing in a ball mill jar.
2) Taking corundum balls (10mm and 5mm in different diameters, and the mass ratio is 3:2), weighing the powder according to the step 1), and mixing the corundum balls and the powder according to the ball powder mass ratio of 2: 1, adding corundum balls into a ball milling tank.
3) And adding absolute ethyl alcohol into the ball milling tank, wherein the liquid level is required to be over the corundum balls and the powder.
4) The ball mill was set to rotate at high speed (180rpm) for 10min for ball milling and mixing.
5) And (3) respectively carrying out high-temperature (120 ℃) vacuum drying on the ball-milled composite powder for 3h, carrying out filtering treatment by using a screen, and screening out powder with the particle size of 15-45 mu m to prepare for preparing a coating by subsequent supersonic flame spraying.
Step two: pretreatment of the surface of a part
1) And (3) putting the part into an ultrasonic cleaning machine, adding absolute ethyl alcohol, and removing oil and rust on the surface of the part.
2) And carrying out surface sand blasting and coarsening treatment on the part in a sand blasting machine by adopting 20-mesh brown corundum.
Step three: coating prepared by supersonic flame spraying
1) The coating is prepared by adopting supersonic flame spraying equipment, and the technological parameters are as follows: the flow rate of fuel oil is 20L/h, the flow rate of oxygen is 1000L/min, the flow rate of carrier gas is 600L/h, the powder feeding speed is 2r/min, the moving speed of a spray gun is 400mm/s, the single-channel offset is 4mm, and the spraying distance is 30 mm.
2) Intermittent cooling is set in the spraying process, and the temperature of the sample is strictly controlled below 200 ℃. All coating samples were prepared by spraying 10 times simultaneously, the coating thickness being 300. mu.m.
3) The polished coated surface was subjected to a ball-and-disk dry sliding circumferential wear test according to ASTM G99 using a frictional wear test apparatus UMT-2. The grinding piece is an alumina ball with the diameter of 10mm, the load is 10N, the rotating speed is 420r/min, the friction and wear radius is 7mm, and the friction time is 1 h. The test result shows that the wear rate of the composite coating is low, and the micro-wear appearance shows that the composite coating has less micro-cracks and has the best wear resistance.
Step four: machined part size and roughness
And machining the surface of the part with the coating prepared by supersonic flame spraying to meet the requirements of specific size and roughness.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. Cr (chromium)3C2The wear-resistant coating is characterized by being prepared from the following raw materials in percentage by mass: 68-72% Cr3C217-18% of NiCr and 10-15% of TiC, wherein the sum of the mass percentages of the raw materials is 100%;
wherein, Cr3C2Is micron-sized and TiC is nano-sized.
2. The Cr of claim 13C2Based on a wear resistant coating, characterized in that said Cr3C2The wear-resistant coating is prepared from the following raw materials in percentage by mass: 68-70% Cr3C217-17.5 percent of NiCr and 10-12.5 percent of TiC, wherein the sum of the mass percent of the raw materials is 100 percent.
3. The Cr of claim 13C2Based on a wear resistant coating, characterized in that said Cr3C2The wear-resistant coating is prepared from the following raw materials in percentage by mass: 70-72% Cr3C217.5 to 18 percent of NiCr and 12.5 to 15 percent of TiC, wherein the sum of the mass percent of the raw materials is 100 percent.
4. The Cr of claim 13C2Based on a wear resistant coating, characterized in that said Cr3C2The particle size of (A) is 1-10 μm.
5. The Cr of claim 13C2The base wear-resistant coating is characterized in that the particle size of TiC is 10-100 nm.
6. Cr (chromium)3C2The supersonic flame spraying preparation method of the wear-resistant coating is characterized by comprising the following steps:
mixing Cr3C2- (20-25 wt%) NiCr powder and TiC, uniformly mixing, ball-milling by a wet method, and drying to obtain wear-resistant metal ceramic powder;
pretreating the surface of the part;
spraying wear-resistant metal ceramic powder on the surface of the pretreated part by adopting a supersonic flame method to form Cr3C2A base wear resistant coating;
adjusted to be sprayed with Cr3C2And (4) obtaining the size and the roughness of the part with the wear-resistant coating.
7. The Cr of claim 63C2The supersonic flame spraying preparation method of the wear-resistant coating is characterized in thatAnd the pretreatment comprises the steps of removing oil and rust on the surface of the part and carrying out sand blasting and coarsening treatment on the surface.
8. The Cr of claim 63C2The supersonic flame spraying process of preparing wear-resisting base coating features intermittent cooling and sample temperature below 200 deg.c.
9. The Cr of claim 63C2The supersonic flame spraying preparation method of the wear-resistant coating is characterized in that the technological parameters of the supersonic flame spraying are as follows: the technological parameters are as follows: the flow rate of fuel oil is 20-25L/h, the flow rate of oxygen is 1000-1200L/min, the flow rate of carrier gas is 600-700L/h, the powder feeding speed is 2-3 r/min, the moving speed of a spray gun is 400-450 mm/s, the single-channel offset is 4-6 mm, and the spraying distance is 300-350 mm.
10. The Cr of any one of claims 1 to 53C2The wear-resistant coating is applied to the fields of military industry, aerospace and nuclear energy.
CN202110238780.3A 2021-03-04 2021-03-04 Cr3C 2-based wear-resistant coating and supersonic flame spraying preparation method and application Pending CN113025941A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115121789A (en) * 2022-08-03 2022-09-30 四川苏克流体控制设备有限公司 Thermal shock resistance high wear-resistant coating material and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
严淑群等: "超音速火焰制备硬质陶瓷涂层及其性能研究", 《金属材料与冶金工程》 *
孙乃荣等: "添加纳米TiC对NiTi/Cr_3C_2高速电弧喷涂涂层组织及耐高温冲蚀磨损性能的影响", 《材料开发与应用》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115121789A (en) * 2022-08-03 2022-09-30 四川苏克流体控制设备有限公司 Thermal shock resistance high wear-resistant coating material and preparation method thereof

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