阅读说明：本技术 一种树脂基复材用导电耐磨涂层及其制备方法 (Conductive wear-resistant coating for resin-based composite material and preparation method thereof ) 是由 米鹏博 田歌 宋磊磊 魏成霖 于 2020-07-28 设计创作，主要内容包括：本发明提供了一种树脂基复材用导电耐磨涂层及其制备方法,所述的树脂基复材用导电耐磨涂层包括喷涂于复材表面的织构涂层,所述的织构涂层上设有若干的沟槽,所述的沟槽内喷涂有金属粉末。本发明所述的树脂基复材用导电耐磨涂层通过对涂层的结构设计,树脂基复材可具备良好的电导通性能以及耐磨性,并且具有制备工艺简单,成本低的优势。(The invention provides a conductive wear-resistant coating for a resin-based composite material and a preparation method thereof. According to the conductive wear-resistant coating for the resin-based composite material, the resin-based composite material has good electrical conductivity and wear resistance through the structural design of the coating, and has the advantages of simple preparation process and low cost.)

1. The conductive wear-resistant coating for the resin-based composite material is characterized in that: the composite material comprises a texture coating sprayed on the surface of a composite material, wherein a plurality of grooves are formed in the texture coating, and metal powder is sprayed in the grooves.

2. The conductive wear-resistant coating for resin-based composite material according to claim 1, wherein: the thickness of the texture coating is 250-350 mu m; the texture coating is made of WC-17Co and NiCr-Cr₃C₂TiCN, TiN or AT 40.

3. The conductive wear-resistant coating for resin-based composite material according to claim 1, wherein: the metal powder is at least one of aluminum powder, copper powder or silver powder.

4. The method for preparing the conductive wear-resistant coating for the resin-based composite material as claimed in any one of claims 1 to 3, wherein: the method comprises the following steps:

(1) roughening the surface of the matrix: carrying out sand blasting on the surface of the composite material, and then cleaning, washing and drying the surface of the composite material;

(2) preparing a texture coating: covering a metal net on the surface of the dried composite material, spraying hard wear-resistant powder on the composite material covered with the metal net, and removing the metal net after spraying to form a groove to obtain a texture coating;

(3) preparing a metal layer: spraying metal powder on the texture coating until the grooves are filled to obtain a metal layer;

(4) and (3) post-treatment of the coating: and polishing the surface of the metal layer until the texture coating is exposed, thus obtaining the conductive wear-resistant coating for the resin matrix composite.

5. The method for preparing the conductive wear-resistant coating for the resin-based composite material as claimed in claim 4, wherein: the sand blasting step in the step (1) adopts sand blasting equipment, the sand blasting pressure of the sand blasting equipment is 0.25-0.35Mpa, the sand blasting distance is 100-150mm, and the sand blasting angle is 45-90 degrees; the sand of the sand blasting step is made of brown corundum, and the granularity of the sand is 300-400 mu m.

6. The method for preparing the conductive wear-resistant coating for the resin-based composite material as claimed in claim 4, wherein: in the cleaning step in the step (1), compressed air is used for cleaning floating dust on the surface of the composite material; the cleaning step in the step (1) adopts ultrasonic waves for cleaning.

7. The method for preparing the conductive wear-resistant coating for the resin-based composite material as claimed in claim 4, wherein: the shape of the metal net in the step (2) is a polygon; the diameter of the metal wire of the metal net is 1.0-2.0 mm.

8. The method for preparing the conductive wear-resistant coating for the resin-based composite material as claimed in claim 4, wherein: the hard wear-resistant powder in the step (2) is WC-17Co or NiCr-Cr₃C₂(ii) a The spraying step in the step (2) adopts supersonic flame spraying, and fuel gas (C)₂H₂) The flow rate is 20-26L/min, the oxygen flow rate is 200-230L/min, and the spraying distance is 150-300 mm; the thickness of the texture coating is 250-350 mu m.

9. The method for preparing the conductive wear-resistant coating for the resin-based composite material as claimed in claim 4, wherein: the metal powder in the step (3) is at least one of aluminum powder, copper powder or silver powder; the spraying step in the step (3) adopts supersonic flame spraying, the flow rate of fuel gas (C2H2) is 20-26L/min, the flow rate of oxygen is 200-; the thickness of the texture coating is 250-350 mu m.

Technical Field

The invention belongs to the field of surface protection, and particularly relates to a conductive wear-resistant coating for a resin-based composite material and a preparation method thereof.

Background

The resin-based composite material is widely applied to the aerospace field due to the characteristics of light weight, high strength, corrosion resistance, low cost, strong designability and the like. The resin-based composite material applied to the tip part of the airplane generates static electricity on the surface under the impact of high-speed airflow, so that lightning strikes are caused, and the composite material is deeply layered or seriously ablated. Therefore, a lightning protection measure needs to be taken for the resin-based composite material applied to the tip part of the airplane, and the resin-based composite material is connected with the metal matrix of the airplane by using a conductive substance to release lightning strike charges on the surface. At present, resin matrix composite materials applied to airplanes are mainly carbon fiber composite materials, although carbon fibers have good electric conductivity, in the process of composite molding with a resin matrix, the resin matrix wraps reinforced carbon fibers inside, and the electric conductivity of the surface of the composite materials is poor. In order to meet the lightning protection requirement of the resin matrix composite material, the surface electrical conductivity of the resin matrix composite material needs to be improved.

In addition, the resin-based composite material has poor surface wear resistance and cannot meet the future development requirement. The appearance of the surface coating technology greatly improves the wear resistance of the metal material and obtains great economic benefit. The application of the spraying protection technology to the resin-based composite material is explored, and the improvement of the wear resistance of the resin-based composite material is a good solution for improving the application capability of the resin-based composite material.

Disclosure of Invention

In view of the above, the present invention provides a conductive wear-resistant coating for a resin-based composite material and a preparation method thereof, aiming to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the conductive wear-resistant coating for the resin-based composite material comprises a texture coating sprayed on the surface of the composite material, wherein a plurality of grooves are formed in the texture coating, and metal powder is sprayed in the grooves.

Further, the thickness of the texture coating is 250-350 μm; the texture coating is made of WC-17Co or NiCr-Cr₃C₂TiCN, TiN or AT 40.

Further, the metal powder is at least one of aluminum powder, copper powder or silver powder.

The preparation method of the conductive wear-resistant coating for the resin-based composite material comprises the following steps:

(1) roughening the surface of the matrix: carrying out sand blasting on the surface of the composite material, and then cleaning, washing and drying the surface of the composite material;

(2) preparing a texture coating: covering a metal net on the surface of the dried composite material, spraying hard wear-resistant powder on the composite material covered with the metal net, and removing the metal net after spraying to form a groove to obtain a texture coating;

(3) preparing a metal layer: spraying metal powder on the texture coating until the grooves are filled to obtain a metal layer;

(4) and (3) post-treatment of the coating: and polishing the surface of the metal layer until the texture coating is exposed, thus obtaining the conductive wear-resistant coating for the resin matrix composite.

Furthermore, the sand blasting step in the step (1) adopts sand blasting equipment, the sand blasting pressure of the sand blasting equipment is 0.25-0.35Mpa, the sand blasting distance is 100-150mm, and the sand blasting angle is 45-90 degrees; the sand of the sand blasting step is made of brown corundum, and the granularity of the sand is 300-400 mu m.

Further, in the cleaning step in the step (1), compressed air is used for cleaning floating dust on the surface of the composite material; the cleaning step in the step (1) adopts ultrasonic waves for cleaning.

Further, the shape of the metal mesh in the step (2) is a polygon; the diameter of the metal wire of the metal net is 1.0-2.0 mm.

Further, the hard wear-resistant powder in the step (2) is WC-17Co or NiCr-Cr₃C₂(ii) a The spraying step in the step (2) adopts supersonic flame spraying, and fuel gas (C)₂H₂) The flow rate is 20-26L/min, the oxygen flow rate is 200-230L/min, and the spraying distance is 150-300 mm; the thickness of the texture coating is 250-350 mu m.

Further, the metal powder in the step (3) is at least one of aluminum powder, copper powder or silver powder; saidThe spraying step in the step (3) adopts supersonic flame spraying, and fuel gas (C)₂H₂) The flow rate is 20-26L/min, the oxygen flow rate is 200-230L/min, and the spraying distance is 150-300 mm; the thickness of the texture coating is 250-350 mu m.

And in the spraying step, compressed air is adopted to cool the composite material, the temperature of the composite material is monitored in real time, the spraying is stopped immediately when the temperature of the composite material is higher than 90 ℃, and the spraying is continued when the temperature is lower than 50 ℃.

Compared with the prior art, the invention has the following advantages:

according to the conductive wear-resistant coating for the resin-based composite material, the resin-based composite material has good electrical conductivity and wear resistance through the structural design of the coating, and has the advantages of simple preparation process and low cost.

The preparation method of the conductive wear-resistant coating for the resin-based composite material prepares the hard texture coating on the surface of the resin-based composite material by a thermal spraying technology to form a groove structure, then sprays conductive metal on the surface of the texture coating, fills the groove with the metal, and finally grinds the metal above the surface of the hard texture coating, thereby forming the conductive wear-resistant coating on the surface of the resin-based composite material; the hard texture coating realizes wear resistance, and the metal filled in the groove realizes electric conductivity; the wear resistance is mainly determined by a texture coating material, the higher the hardness of the coating material is, the lower the friction coefficient is, and the better the wear resistance is; the electrical conductivity depends mainly on the conductivity of the metal filling the trench.

Drawings

FIG. 1 is a pictorial view of an electrically conductive wear-resistant coating in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the conductive wear-resistant coating of the present invention;

fig. 3 is a schematic view of the conductive wear-resistant coating according to the embodiment of the invention.

Description of reference numerals:

1. compounding materials; 2. texture coating; 3. a metal layer; 4. and (4) a groove.

Detailed Description

Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.

The present invention will be described in detail with reference to examples.