CN114525467A - Preparation method of wear-resistant composite ceramic coating on inner wall of cylinder sleeve of diesel engine - Google Patents

Preparation method of wear-resistant composite ceramic coating on inner wall of cylinder sleeve of diesel engine Download PDF

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CN114525467A
CN114525467A CN202210072227.1A CN202210072227A CN114525467A CN 114525467 A CN114525467 A CN 114525467A CN 202210072227 A CN202210072227 A CN 202210072227A CN 114525467 A CN114525467 A CN 114525467A
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wear
chromium oxide
coating
ceramic coating
preparation
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张超
毛霖
胡涵
肖金坤
魏新龙
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Yangzhou University
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Yangzhou 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • 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
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof

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

Abstract

The invention discloses a preparation method of a wear-resistant composite ceramic coating on the inner wall of a cylinder sleeve of a diesel engine, which comprises the steps of weighing chromium oxide and aluminum oxide powder according to the mass percent, crushing and mechanically mixing uniformly to prepare chromium oxide-aluminum oxide powder; and spraying chromium oxide-aluminum oxide powder on the surface of the stainless steel substrate subjected to sand blasting by adopting atmospheric plasma to prepare the chromium oxide-based ceramic wear-resistant coating. The invention overcomes the problems of surface wear adhesion failure and the like of the traditional cylinder sleeve, the added alumina powder is beneficial to toughening of the pure chromium oxide ceramic coating, the brittle fracture of the coating under the sudden load is reduced, the integral hardness is further improved by adding the alumina hard phase, the chromium oxide coating added with the alumina has lower friction coefficient and wear rate under the dry friction condition, and the wear loss is greatly reduced compared with the traditional cast iron and the pure chromium oxide coating.

Description

Preparation method of wear-resistant composite ceramic coating on inner wall of cylinder sleeve of diesel engine
Technical Field
The invention belongs to the fields of thermal spraying technology and surface engineering, and particularly relates to a preparation method of a wear-resistant composite ceramic coating on the inner wall of a cylinder sleeve of a diesel engine.
Background
Cast iron or aluminum alloy materials adopted by the traditional cylinder sleeve are easy to generate a furrow effect or adhesion in the abrasion process, and the abrasion forms often cause the loss of inner wall materials and the mutation of the friction coefficient. The chromium oxide ceramic coating has high surface hardness and wear resistance, and good interface bonding strength can be obtained by spraying the chromium oxide ceramic coating with atmospheric plasma.
Early studies considered that chromium oxide has better tribological properties than alumina. However, chromium oxide powder is sensitive to plasma spraying parameters, since fine changes in the spraying parameters (current, voltage, argon flow and hydrogen flow) have a large effect on the molten state of the chromium oxide powder, and the flattening process of the molten droplets determines the porosity and bonding strength of the chromium oxide. Alumina ceramics have extremely high hardness and wear resistance, which is second only to diamond in nature.
The alumina powder is first prepared from alpha-Al in the high temperature melting process of thermal spraying, especially plasma spraying technology2O3Phase transformation to gamma-Al2O3Phase, alpha-Al2O3The phase has stable and excellent structure and mechanical property, but gamma-Al2O3Representing the degree of melting of the alumina powder in the plasma, the higher the gamma phase content, the more sufficient the degree of melting. The pure chromium oxide coating has high hardness, poor wettability and high brittleness.
The research on the design of the chromium oxide-aluminum oxide composite ceramic coating is relatively few at present, and at present, for example: chinese patent CN 111534799A deposits an alloy bonding layer and Cr/Cr on the surface of a substrate respectively by arc ion plating2O3Transition layer and Al-Cr-O surface layer, the gradient coating prepared by the patent is characterized by heat insulation and oxidation resistance, butThe Al-Cr-O layer on the outer layer is easy to damage, and the coefficient of thermal expansion of metal and ceramic is different, Cr/Cr2O3The transition layer has a greater likelihood of brittle fracture. The Chinese patent CN 105369205A uses a magnetron sputtering process to prepare the chromium oxide film, and the invention has the advantages that the thickness of the coating is controlled within 10 mu m, the surface is smooth and compact, and the penetration of corrosive media can be effectively blocked. But have poor wear resistance under higher load conditions, especially when the dual is a high hardness pair.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
Therefore, the invention aims to overcome the defects in the prior art and provide a preparation method of a wear-resistant composite ceramic coating on the inner wall of a cylinder sleeve of a diesel engine.
In order to solve the technical problems, the invention provides the following technical scheme: a process for preparing the antiwear composite ceramic coating on the internal surface of cylinder sleeve of diesel engine includes such steps as coating the antiwear composite ceramic on the internal surface of cylinder sleeve,
weighing the chromium oxide and the aluminum oxide powder according to the mass percentage, crushing, and mechanically and uniformly mixing to prepare chromium oxide-aluminum oxide powder;
and spraying chromium oxide-aluminum oxide powder on the surface of the stainless steel substrate subjected to sand blasting by adopting atmospheric plasma to prepare the chromium oxide-based ceramic wear-resistant coating.
As a preferred scheme of the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine, the preparation method comprises the following steps: the chromium oxide-aluminum oxide powder comprises the following components in percentage by weight: 80wt.% chromium oxide powder, 20wt.% aluminium oxide powder.
As a preferred scheme of the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine, the preparation method comprises the following steps: the surface roughness of the stainless steel substrate subjected to sand blasting is Ra7.0-9.0.
As a preferred scheme of the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine, the preparation method comprises the following steps: adding alumina powder as alpha-Al2O3And (4) phase(s).
As a preferred scheme of the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine, the preparation method comprises the following steps: the alumina in the chromium oxide-based ceramic wear-resistant coating is alpha-Al2O3And (4) phase(s).
As a preferred scheme of the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine, the preparation method comprises the following steps: the surface of the stainless steel substrate subjected to sand blasting is subjected to ultrasonic cleaning by absolute ethyl alcohol or acetone, and then the surface of the clamp is subjected to sand blasting by adopting 24-mesh brown corundum sand to obtain the clamp.
As a preferred scheme of the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine, the preparation method comprises the following steps: the parameters of the atmospheric plasma spraying process are as follows: spraying distance of 150mm, plasma gas flow H2The flow rate is 4L/min, the powder feeding speed is 30g/min, the Ar flow rate is 35L/min, the current is 500A, the voltage is 51.5V, the moving speed of the spray gun is 200mm/s, the spray gun moves downwards for 3mm each time, and the spraying is repeated for 3 times.
The invention also aims to overcome the defects in the prior art and provide a product prepared by the preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder sleeve of the diesel engine.
In order to solve the technical problems, the invention provides the following technical scheme: the hardness of the chrome oxide-alumina ceramic coating of the product is not lower than 1200HV 1.
As a preferable mode of the product of the present invention, wherein: the friction coefficient of the chromium oxide-aluminum oxide ceramic coating is lower than 0.3 under the dry grinding condition, and the wear rate is lower than 2.0 multiplied by 10-7mm3/N·m。
The invention has the beneficial effects that:
(1) the ceramic coating phase composition provided by the invention is Cr2O3And alpha-Al2O3Phase, metastable-free gamma-Al2O3And meanwhile, the wear resistance of the coating is improved by the alumina hard phase under the dry friction condition, and the service life of the coating is obviously prolonged.
(2) The ceramic coating provided by the invention has the advantages that the interface of the chromium oxide and the aluminum oxide is tightly combined, the porosity and the cracks are obviously reduced, and the toughness of the coating is obviously improved.
(3) The preparation method of the wear-resistant coating on the inner wall of the cylinder sleeve of the diesel engine provided by the invention realizes the optimization of the organization structure of the ceramic coating, greatly improves the compactness of the prepared coating, effectively overcomes the problems existing in the use process of the cast iron surface and the pure chromium oxide coating, and obviously improves the tribological performance of the inner wall of the cylinder sleeve.
(4) The invention provides a method for enhancing the tribological performance of a chromium oxide-based ceramic coating by adding aluminum oxide powder, and provides a new idea for regulating and controlling the structure of the ceramic coating according to specific service working conditions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 shows example 1 Cr of the present invention2O3-Al2O3XRD pattern of ceramic coating.
FIG. 2 shows example 1 Cr of the present invention2O3-Al2O3Cross-sectional SEM images of the ceramic coating.
FIG. 3 shows Cr in the dry friction condition of example 1 of the present invention2O3-Al2O3Comparative graph of coefficient of friction of ceramic coating, wherein CA 5: cr (chromium) component2O3-5wt.%Al2O3，CA10：Cr2O3-10wt.%Al2O3，CA20：Cr2O3-20wt.%Al2O3，CA30：Cr2O3-30wt.%Al2O3。
FIG. 4 shows Cr in the dry friction condition of example 1 of the present invention2O3-Al2O3Wear rate comparison of ceramic coatings, where CA 5: cr (chromium) component2O3-5wt.%Al2O3，CA10：Cr2O3-10wt.%Al2O3，CA20：Cr2O3-20wt.%Al2O3，CA30：Cr2O3-30wt.%Al2O3。
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The invention provides a preparation method of a wear-resistant coating on the inner wall of a cylinder sleeve of a diesel engine. Under the condition of dry friction, fine abrasive dust generated by abrasive particle abrasion is accumulated and compacted in the peeling pit, the abrasion of the ceramic coating and the mating material is low, the friction coefficient is less than 0.3, and the service life of the base body and the counter-abrasion part is greatly prolonged.
The powder, apparatus and the like used in the present invention are commercially available or can be prepared by a conventional method.
Example 1:
1) the mixture for sprayingThe powder comprises the following components in percentage by mass: cr (chromium) component2O3Ceramic powder: 80 percent; al (Al)2O3Ceramic powder: 20 percent.
2) And ultrasonically cleaning the surface of the stainless steel substrate by using acetone to remove impurities such as oil stain and rust, and drying after cleaning. And then carrying out sand blasting and coarsening treatment on the surface of a stainless steel matrix to be sprayed by using brown corundum sand with the granularity of 24 meshes to improve the bonding strength between the coating and the matrix, wherein the coarsened surface roughness is Ra7.0-9.0.
3) Weighing chromium oxide ceramic particles and aluminum oxide powder according to the component proportion of the composite coating, pouring the chromium oxide ceramic particles and the aluminum oxide powder into a canning container, performing ball milling for 3 hours according to the ball milling parameter with the rotating speed of 300 r/min, and drying for 2 hours at the temperature of 100 ℃ after the ball milling is finished.
4) And pouring the dried mixed powder into a powder feeding pipe, and adjusting the powder feeding airflow to ensure that the powder is just fed into the flame flow center of the plasma arc. The technological parameters of the atmospheric plasma spraying are as follows: the spraying distance was 150mm, the flow rate of plasma gas H2 was 4L/min, the flow rate of Ar was 35L/min, the current was 500A, the voltage was 51.5V, the moving speed of the spray gun was 200mm/s, each time moving 3mm downward, and the spraying was repeated 3 times. Finally, the ceramic composite coating with the thickness of about 150-300 mu m is deposited on the stainless steel surface subjected to sand blasting roughening treatment.
5) Cr obtained by preparation2O3-Al2O3The ceramic coating was analyzed by X-ray diffraction (XRD) for its phase composition. The results are shown in FIG. 1, Cr2O3-Al2O3Cr in composite ceramic coating2O3Strong wave peak, hard phase Al2O3All phases are alpha-Al2O3These hard phases act as dispersion strengthening in the coating.
6) By taking a cross-sectional SEM image, as shown in fig. 2, the ceramic coating produced was dense in texture, calculated to have a porosity of 4.27%, well below 12% of that of a pure chromium oxide coating.
7) The hardness of the prepared coating is uniformly distributed, wherein the Vickers hardness of the chromium oxide/aluminum oxide coating can reach 1509.10 HV1, which is much higher than that of a stainless steel base material.
8) For preparation ofThe coating was subjected to a ball-and-disc friction wear test, as a control, simultaneously under the same conditions. Wherein the dual ball is made of Si with a diameter of 5mm3N4Ball, load 40N, frequency 4Hz, grinding crack length 5mm, total friction time 6 h.
The results show that Cr is shown in FIG. 32O3-Al2O3The friction coefficient of the ceramic coating is as low as 0.28 and is lower than that of pure Cr2O30.35 of ceramic coating; as shown in FIG. 4, Cr was present in the case of no lubrication2O3-Al2O3The wear rate of the ceramic coating was 8.18X 10-8 mm3M, lower than pure Cr2O314.57X 10 ceramic coating-8mm3/N·m。
Example 2
The difference from example 1 is that: the mixed powder in the step 1) comprises the following components in percentage by mass: cr (chromium) component2O3Ceramic powder: 70 percent; al (Al)2O3Ceramic powder: 30 percent.
To ensure Cr2O3With Al2O3The ceramic powder was homogenized and mixed in step 3) of example 1. In step 5), Cr2O3Phase with Al2O3Enhanced peak intensity of phase, Al2O3The number of phase peaks increases. In step 7), the vickers hardness of the chromia/alumina coating reached 1381.09 HV1, which is much higher than the hardness of the stainless steel substrate. In step 8), Cr2O3-Al2O3The friction coefficient of the ceramic coating is 0.43 and is lower than that of pure Cr2O3The friction coefficient of the ceramic coating and the abrasion rate under the non-lubrication condition are 14.57 multiplied by 10-8mm3M, lower than pure Cr2O3Wear rate of the ceramic coating.
Example 3
The difference from example 1 is that: the mixed powder in the step 1) comprises the following components in percentage by mass: cr (chromium) component2O3Ceramic powder: 75 percent; al (Al)2O3Ceramic powder: 25 percent.
To ensure Cr2O3With Al2O3The ceramic powder was homogenized and mixed in step 3) of example 1. In step 5), Cr2O3Phase with Al2O3Enhanced peak intensity of phase, Al2O3The number of phase peaks increases.
In step 7), the vickers hardness of the chromia/alumina coating reached 1512.07 HV1, which is much higher than the hardness of the stainless steel substrate.
In step 8), Cr2O3-Al2O3The friction coefficient of the ceramic coating is 0.33 and is lower than that of pure Cr2O3The friction coefficient of the ceramic coating and the abrasion rate under the non-lubrication condition are 13.76 multiplied by 10-8mm3M, lower than pure Cr2O3Wear rate of the ceramic coating.
Example 4
The difference from example 1 is that: the mixed powder in the step 1) comprises the following components in percentage by mass: cr (chromium) component2O3Ceramic powder: 85 percent; al (Al)2O3Ceramic powder: 15 percent.
To ensure Cr2O3With Al2O3The ceramic powder was homogenized and mixed in step 3) of example 1. In step 5), Cr2O3Phase with Al2O3Reduced peak intensity, Al2O3The number of phase peaks decreases. In step 7), the vickers hardness of the chromia/alumina coating reached 1492.78 HV1, which is much higher than the hardness of the stainless steel substrate. In step 8), Cr2O3-Al2O3The friction coefficient of the ceramic coating is 0.32 and is lower than that of pure Cr2O3The friction coefficient of the ceramic coating and the abrasion rate under the non-lubrication condition are 9.72 multiplied by 10-8mm3M, lower than pure Cr2O3Wear rate of the ceramic coating.
Example 5
The difference from example 1 is that: the mixed powder in the step 1) comprises the following components in percentage by mass: cr (chromium) component2O3Ceramic powder: 90 percent; al (Al)2O3Ceramic powder: 10 percent.
To ensure Cr2O3With Al2O3The ceramic powder was homogenized and mixed in step 3) of example 1. In step 5), Cr2O3Phase with Al2O3Decrease in peak intensity, Al2O3The number of phase peaks decreases. In step 7), the vickers hardness of the chromia/alumina coating reached 1423.65 HV1, which is much higher than the hardness of the stainless steel substrate. In step 8), Cr2O3-Al2O3The friction coefficient of the ceramic coating is 0.36 and is lower than that of pure Cr2O3The friction coefficient of the ceramic coating and the abrasion rate under the non-lubrication condition are 11.45 multiplied by 10-8mm3M, lower than pure Cr2O3Wear rate of the ceramic coating.
Example 6
The difference from example 1 is that: the mixed powder in the step 1) comprises the following components in percentage by mass: cr (chromium) component2O3Ceramic powder: 95 percent; al (Al)2O3Ceramic powder: 5 percent.
To ensure Cr2O3With Al2O3The ceramic powder was homogenized and mixed in step 3) of example 1. In step 5), Cr2O3Phase with Al2O3Reduced peak intensity, Al2O3The number of phase peaks decreases. In step 7), the vickers hardness of the chromia/alumina coating reached 1376.58HV1, which is much higher than the hardness of the stainless steel substrate. In step 8), Cr2O3-Al2O3The friction coefficient of the ceramic coating is 0.40 and is lower than that of pure Cr2O3The friction coefficient of the ceramic coating and the abrasion rate under the non-lubrication condition are 12.42 multiplied by 10-8mm3M, lower than pure Cr2O3Wear rate of the ceramic coating.
At present, alumina is used as base powder and mixed chromium oxide is researched, the method has good hardness and wear resistance, but the alumina phase is mainly alpha and gamma phases, the performance is not stable enough, and phase change is easy to generate particularly when the temperature gradient is large. The replacement effect of the chromium oxide of the invention on the alumina under the plasma showsThe chromium oxide is used as base powder, and the aluminum oxide is added, so that the overall wear resistance can be further improved, wherein the overall wear resistance is optimal when the mass percentage of the aluminum oxide is about 20%. The performance test parameters of the ceramic composite coating prepared by the invention are higher than those of other tests in the field, the load is 40N, the total stroke is 864m, and the mating part is high-hardness Si3N4But still has better results than the same coating in the field, the friction coefficient is as low as 0.28, and the wear rate is 10-8 mm3In the order of/N.m; the invention provides a method and parameters for preparing the material coating by atmospheric plasma with better performance, and the best performance is realized.
The method firstly considers the replacement effect of the chromium oxide on the aluminum oxide, abandons the method of using aluminum oxide with higher hardness as base powder, and selects the chromium oxide as the base powder; secondly, the replacement solid solution is (Al, Cr)2O3The replacement ratio of the aluminum oxide to the chromium oxide is 1: 1, the coating is saturated, when the content of alumina is lower, the hard phase cannot achieve the toughening effect, and when the content is higher, the overall hardness of the coating is reduced due to the low-hardness solid solution; therefore, in the present invention, the alumina ratio of 30-0% gradient is selected as the test object, and it can be seen that the friction test result has regularity, so that it is considered that the performance is best when the alumina content is 20% under the preparation process.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (9)

1. A preparation method of a wear-resistant composite ceramic coating on the inner wall of a cylinder sleeve of a diesel engine is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
weighing the chromium oxide and the aluminum oxide powder according to the mass percentage, crushing, and mechanically and uniformly mixing to prepare chromium oxide-aluminum oxide powder;
and spraying chromium oxide-aluminum oxide powder on the surface of the stainless steel substrate subjected to sand blasting by adopting atmospheric plasma to prepare the chromium oxide-based ceramic wear-resistant coating.
2. The preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder liner of the diesel engine as claimed in claim 1, wherein the preparation method comprises the following steps: the chromium oxide-aluminum oxide powder comprises the following components in percentage by weight: 80wt.% chromium oxide powder, 20wt.% aluminum oxide powder.
3. The preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder liner of the diesel engine as claimed in claim 1 or 2, which is characterized in that: the surface roughness of the stainless steel substrate subjected to sand blasting is Ra7.0-9.0.
4. The preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder liner of the diesel engine as claimed in claim 3, characterized in that: adding alumina powder as alpha-Al2O3And (4) phase(s).
5. The preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder liner of the diesel engine as claimed in claim 1 or 4, wherein the preparation method comprises the following steps: the alumina in the chromium oxide-based ceramic wear-resistant coating is alpha-Al2O3And (4) phase(s).
6. The preparation method of the wear-resistant composite ceramic coating on the inner wall of the cylinder liner of the diesel engine as claimed in claim 3, characterized in that: the surface of the stainless steel substrate subjected to sand blasting is subjected to ultrasonic cleaning by absolute ethyl alcohol or acetone, and then the surface of the clamp is subjected to sand blasting by adopting 24-mesh brown corundum sand to obtain the clamp.
7. The preparation method of the wear-resistant composite ceramic coating of the inner wall of the cylinder liner of the diesel engine as claimed in any one of claims 1, 2, 3 or 6, wherein: the parameters of the atmospheric plasma spraying process are as follows: spraying distance of 150mm, plasma gas flow H2The flow rate is 4L/min, the powder feeding speed is 30g/min, the Ar flow rate is 35L/min, the current is 500A, the voltage is 51.5V, the moving speed of the spray gun is 200mm/s, the spray gun moves downwards for 3mm each time, and the spraying is repeated for 3 times.
8. The product prepared by the preparation method of the wear-resistant composite ceramic coating on the inner wall of the diesel engine cylinder sleeve as claimed in any one of claims 1 to 7 is characterized in that: the hardness of the chromium oxide-aluminum oxide ceramic coating of the product is not less than 1200HV 1.
9. The product of claim 8, wherein: the friction coefficient of the chromium oxide-aluminum oxide ceramic coating is lower than 0.3 under the dry grinding condition, and the wear rate is lower than 2.0 multiplied by 10-7mm3/N·m。
CN202210072227.1A 2022-01-21 2022-01-21 Preparation method of wear-resistant composite ceramic coating on inner wall of cylinder sleeve of diesel engine Pending CN114525467A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115198224A (en) * 2022-07-06 2022-10-18 扬州大学 Preparation method of hard alloy-like structure composite ceramic wear-resistant coating

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077808A (en) * 1973-08-31 1978-03-07 Kaman Sciences Corporation Chromia-bonded refractory body devoid of vitreous and sintered bonding
US20030191009A1 (en) * 2002-04-08 2003-10-09 Yu Sung H. Chromia spray powders
US20190024795A1 (en) * 2016-02-12 2019-01-24 Oerlikon Surface Solutions Ag, Pfäffikon Tribological system of an internal combustion engine with a coating
CN111676439A (en) * 2020-06-12 2020-09-18 扬州大学 Preparation method of wear-resistant coating on surface of floating clamp of numerical control punch press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077808A (en) * 1973-08-31 1978-03-07 Kaman Sciences Corporation Chromia-bonded refractory body devoid of vitreous and sintered bonding
US20030191009A1 (en) * 2002-04-08 2003-10-09 Yu Sung H. Chromia spray powders
US20190024795A1 (en) * 2016-02-12 2019-01-24 Oerlikon Surface Solutions Ag, Pfäffikon Tribological system of an internal combustion engine with a coating
CN111676439A (en) * 2020-06-12 2020-09-18 扬州大学 Preparation method of wear-resistant coating on surface of floating clamp of numerical control punch press

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王建萍 等: ""等离子喷涂制备Al2O3- Cr2O3复相涂层组织及性能"", 《陶瓷学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115198224A (en) * 2022-07-06 2022-10-18 扬州大学 Preparation method of hard alloy-like structure composite ceramic wear-resistant coating
CN115198224B (en) * 2022-07-06 2023-09-08 扬州大学 Preparation method of composite ceramic wear-resistant coating with similar hard alloy structure

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