Carbon fiber material workpiece sprayed with stainless steel coating on surface and preparation method of carbon fiber material workpiece

Abstract

The invention relates to the technical field of materials, in particular to a carbon fiber material workpiece sprayed with a stainless steel coating on the surface and a preparation method of the carbon fiber material workpiece. The carbon fiber material workpiece comprises a carbon fiber matrix, a resin layer arranged on the surface of the carbon fiber matrix, a transition layer formed on the surface of the resin layer and a stainless steel layer formed on the surface of the transition layer. Compared with the prior art, the transition layer is additionally arranged, on one hand, the hardness of the stainless steel layer on the surface layer can be improved, on the other hand, the bonding strength between the stainless steel layer and the carbon fiber matrix can be improved, the service life of the carbon fiber material workpiece can be maintained, and especially under the condition that the temperature of the service environment is high, the service life of the carbon fiber material workpiece is prolonged. It can be guaranteed that the coating has excellent stability and is not prone to falling off.

Description

Technical Field

[0001] The invention relates to the technical field of materials, and in particular to a carbon fiber material workpiece with a stainless steel coating sprayed on the surface and a preparation method thereof. Background Art

[0002] The main part of the rollers commonly used in production lines is generally made of metal, which has a good static conductivity effect, but the cost is relatively high, the roller mass is large, and the rotational energy required for operation is also large, which is not conducive to sudden turns and stops. It is easy to corrode after long-term use, and long-term horizontal placement can easily cause the roller body to bend and deform, affecting the accuracy of the roller body.

[0003] Carbon fiber has many excellent properties such as high strength, high modulus, high temperature resistance, wear resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, thermal conductivity and far infrared radiation. Carbon fiber tubes can be used in textile machinery, aluminum foil machinery, plastic film machinery, papermaking machinery, printing / dying machinery, to solve the problems of high cost of rollers made of metal, easy corrosion after long-term use, and easy bending and deformation of the roller body, which affects the accuracy of the roller body.

[0004] In order to give full play to the advantages of metal and carbon fiber materials and avoid their disadvantages, it is considered to spray a metal layer on the surface of the carbon fiber roller. This not only utilizes the lightweight and high-strength characteristics of the carbon fiber material itself, but also gives the workpiece surface good impact resistance and wear resistance.

[0005] For example, CN118063986A discloses a method for spraying tungsten carbide on the surface of a carbon fiber composite material, which includes spraying a layer of epoxy resin on the surface of the carbon fiber composite material, then cold spraying a layer of alloy powder and curing it, and finally spraying tungsten carbide powder to obtain a carbon fiber roller containing a tungsten carbide layer. The present invention solves the problem of the fragility of the surface of the carbon fiber roller, forms an adhesive buffer layer with epoxy resin and alloy powder, stably attaches the functional coating to the surface of the carbon fiber composite material, reduces the process difficulty, and effectively controls the probability of failure and scrapping of the roller surface.

[0006] The carbon fiber roller is expensive and the wear-resistant carbon roller used for general purposes cannot reflect its value. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned defects existing in the use of carbon fiber rollers, and to provide a carbon fiber material workpiece with a stainless steel coating sprayed on the surface and a preparation method thereof.

[0008] In a first aspect of the present invention, a carbon fiber workpiece with a stainless steel coating sprayed on its surface is provided, which adopts the following technical solution: A carbon fiber material workpiece with a stainless steel coating sprayed on its surface comprises a carbon fiber matrix, a resin layer arranged on the surface of the carbon fiber matrix, a transition layer formed on the surface of the resin layer, and a stainless steel layer formed on the surface of the transition layer.

[0009] Compared with the prior art mentioned in the background technology, a transition layer is added in the present solution. The setting of the transition layer can, on the one hand, help improve the hardness of the surface stainless steel layer, and on the other hand, can improve the bonding strength between the stainless steel layer and the carbon fiber matrix, which is beneficial to maintain the service life of the carbon fiber material workpiece, especially when the ambient temperature is high, it can ensure that the coating has excellent stability and is not easy to fall off.

[0010] Preferably, the transition layer is a transition layer formed by alloy powder.

[0011] Preferably, the alloy powder is doped with magnetic material powder.

[0012] Preferably, the raw material of the stainless steel layer is any one of 304 stainless steel powder, 304L stainless steel powder, 316 stainless steel powder, 316L stainless steel powder or a mixture of several thereof.

[0013] Preferably, the thickness of the transition layer is greater than the thickness of the resin layer.

[0014] Preferably, a sand layer is formed between the carbon fiber matrix and the resin layer. By providing the sand layer, the specific surface area of ​​the carbon fiber matrix surface is increased, which is beneficial to the stable formation of the subsequent coating.

[0015] Preferably, the sand layer is formed by spraying white corundum with a mesh size of 30 to 50.

[0016] The second aspect of the present invention provides a method for preparing the above-mentioned carbon fiber material workpiece with a stainless steel coating sprayed on the surface, comprising the following steps: (1) Providing a carbon fiber matrix; (2) Clean the substrate surface and sandblast to form a sand layer; (3) Spraying hot-melt resin on the surface of the substrate having the sand layer formed thereon to form a resin layer; (4) Spraying alloy powder on the surface of the resin layer to form a transition layer; (5) Spray stainless steel powder on the surface of the transition layer to form a stainless steel layer.

[0017] Preferably, after step (4) and before forming the stainless steel layer, the workpiece is placed under high temperature and high pressure conditions for 20 to 40 minutes.

[0018] Preferably, the high temperature and high pressure conditions are a temperature 10 to 35 degrees Celsius lower than the melting point of the resin and a pressure of 2 to 5 atmospheres.

[0019] Preferably, in step (5), the spraying conditions of the stainless steel layer are: spraying current 400-500A, spraying voltage 30-40V, powder feeding speed 50-100g / min, and coating spraying thickness 250-300 microns.

[0020] By implementing the above technical solution, compared with the prior art, the present invention has the following advantages: 1. The present invention forms a stainless steel layer on the surface of the carbon fiber matrix, giving the workpiece surface good impact resistance and wear resistance.

[0021] 2. Before the stainless steel layer is formed, a resin layer and an alloy layer are sequentially formed on the surface of the substrate, which improves the connection strength between the stainless steel layer and the substrate and makes the formation of the stainless steel layer more stable.

[0022] 3. Through targeted optimization and improvement of the process, the resin layer and the alloy layer are further assisted to provide a strong connection between the stainless steel layer and the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 1 is a schematic diagram of the hierarchical structure of a carbon fiber workpiece according to an embodiment of the present invention.

[0024] In the figure, 101 is a carbon fiber matrix, 102 is a resin layer, 103 is an alloy layer, and 104 is a stainless steel layer. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention by specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and embodiments can be combined with each other without conflict. The methods used in the embodiments of the present invention are all conventional methods unless otherwise specified.

[0026] Example 1 This embodiment provides a carbon fiber roller with a stainless steel coating sprayed on the surface, comprising a carbon fiber roller core, a resin layer disposed on the surface of the carbon fiber roller core, a transition layer formed on the surface of the resin layer, and a stainless steel layer formed on the surface of the transition layer. The preparation method is as follows:

[0027] S1. Clean the surface of the carbon fiber roller core and sandblast to form a sand layer. Use 30-50 mesh white corundum for sandblasting.

[0028] S2. On the surface of the sand layer, a resin layer is formed by spraying. The resin adopts epoxy resin and the thickness of the formed resin layer is 100 microns.

[0029] S3. On the surface of the resin layer, an alloy transition layer is formed by spraying. The alloy transition layer uses aluminum alloy powder and has a thickness of 150 microns.

[0030] S4. On the surface of the alloy transition layer, a stainless steel layer is formed by spraying. The stainless steel layer is made of 304 stainless steel powder and is formed by spraying with a thickness of 250 microns.

[0031] Example 2 This embodiment provides a carbon fiber roller with a stainless steel coating sprayed on the surface, comprising a carbon fiber roller core, a resin layer disposed on the surface of the carbon fiber roller core, a transition layer formed on the surface of the resin layer, and a stainless steel layer formed on the surface of the transition layer. The preparation method is as follows:

[0032] S1. Clean the surface of the carbon fiber roller core and sandblast to form a sand layer. Use 30-50 mesh white corundum for sandblasting.

[0033] S2. On the surface of the sand layer, a resin layer is formed by spraying. The resin adopts water-based polyurethane and the thickness of the formed resin layer is 120 microns.

[0034] S3. On the surface of the resin layer, an alloy transition layer is formed by spraying. The alloy transition layer uses aluminum alloy powder and has a thickness of 200 microns.

[0035] S4. On the surface of the alloy transition layer, a stainless steel layer is formed by spraying. The stainless steel layer is 304 stainless steel powder, which is formed by spraying and has a thickness of 280 microns.

[0036] Example 3 This embodiment provides a carbon fiber roller with a stainless steel coating sprayed on the surface, comprising a carbon fiber roller core, a resin layer disposed on the surface of the carbon fiber roller core, a transition layer formed on the surface of the resin layer, and a stainless steel layer formed on the surface of the transition layer. The preparation method is as follows:

[0037] S1. Clean the surface of the carbon fiber roller core and sandblast to form a sand layer. Use 30-50 mesh white corundum for sandblasting.

[0038] S2. On the surface of the sand layer, a resin layer is formed by spraying. The resin adopts epoxy resin and the thickness of the formed resin layer is 100 microns.

[0039] S3. On the surface of the resin layer, an alloy transition layer is formed by spraying. The alloy transition layer uses aluminum alloy powder and has a thickness of 150 microns.

[0040] S4. The roller core having the alloy transition layer formed thereon is placed in a sealed environment at 200° C. and 2 atmospheres for treatment for 25 minutes.

[0041] S5. On the surface of the alloy transition layer, a stainless steel layer is formed by spraying. The stainless steel layer is made of 304 stainless steel powder and is formed by spraying with a thickness of 250 microns.

[0042] Example 4 This embodiment provides a carbon fiber roller with a stainless steel coating sprayed on the surface, comprising a carbon fiber roller core, a resin layer disposed on the surface of the carbon fiber roller core, a transition layer formed on the surface of the resin layer, and a stainless steel layer formed on the surface of the transition layer. The preparation method is as follows:

[0043] S1. Clean the surface of the carbon fiber roller core and sandblast to form a sand layer. Use 30-50 mesh white corundum for sandblasting.

[0044] S2. On the surface of the sand layer, a resin layer is formed by spraying. The resin is polyurethane and the thickness of the formed resin layer is 100 microns.

[0045] S3. On the surface of the resin layer, an alloy transition layer is formed by spraying. The alloy transition layer uses aluminum alloy powder and has a thickness of 150 microns.

[0046] S4. The roller core having the alloy transition layer formed thereon is placed in a sealed environment at 120° C. and 3 atmospheres for treatment for 20 minutes.

[0047] S5. On the surface of the alloy transition layer, a stainless steel layer is formed by spraying. The stainless steel layer is made of 304 stainless steel powder and is formed by spraying with a thickness of 250 microns.

[0048] Example 5 The optimization and improvement based on Example 4 is different from Example 4 in that magnetic nano-iron tetroxide particles are added to the alloy powder forming the alloy transition layer in S3, and the added mass ratio of aluminum alloy powder to magnetic nano-iron tetroxide particles is 5:1.

[0049] Example 6 The optimization and improvement based on Example 4 is different from Example 4 in that magnetic nano-iron tetroxide particles are added to the alloy powder forming the alloy transition layer in S3.

[0050] Prepared as follows: S1. Clean the surface of the carbon fiber roller core and sandblast to form a sand layer. Use 30-50 mesh white corundum for sandblasting.

[0051] S2. On the surface of the sand layer, a resin layer is formed by spraying. The resin is polybutylene terephthalate (PBT). The thickness of the formed resin layer is 100 microns.

[0052] S3. On the surface of the resin layer, an alloy transition layer is formed by spraying. The alloy transition layer uses aluminum alloy powder and has a thickness of 150 microns.

[0053] S4. On the surface of the alloy transition layer, a magnetic layer is formed by spraying, using magnetic nano-iron tetroxide particles with a thickness of 30 microns.

[0054] S5. The roller core having the alloy transition layer formed thereon is placed in a sealed environment at 120° C. and 3 atmospheres for treatment for 20 minutes.

[0055] S6. On the surface of the alloy transition layer, a stainless steel layer is formed by spraying. The stainless steel layer is made of 304 stainless steel powder and is formed by spraying with a thickness of 250 microns.

[0056] Comparative Example 1 This comparative example provides a carbon fiber roller with a stainless steel coating sprayed on the surface, comprising a carbon fiber roller core, a resin layer disposed on the surface of the carbon fiber roller core, and a stainless steel layer formed on the surface of the resin layer. The preparation method is as follows:

[0057] S1. Clean the surface of the carbon fiber roller core and sandblast to form a sand layer. Use 30-50 mesh white corundum for sandblasting.

[0058] S2. On the surface of the sand layer, a resin layer is formed by spraying. The resin is polyurethane and the thickness of the formed resin layer is 100 microns.

[0059] S3. On the surface of the resin layer, a stainless steel layer is formed by spraying. The stainless steel layer is made of 304 stainless steel powder and is formed by spraying with a thickness of 250 microns.

[0060] The difference from Example 1 is that no alloy transition layer is provided.

[0061] The hardness of the coating on the surface of the carbon fiber roller obtained in the above-mentioned embodiments and comparative examples was tested, and the results are shown in Table 1.

[0062] Table 1 Microhardness of the surface coating of the carbon fiber roller obtained in each embodiment and comparative example Carbon fiber roller Microhardness (HV0.1) Example 1 563 Example 2 568 Example 3 604 Example 4 610 Example 5 601 Example 6 606 Comparative Example 1 324 It can be seen from Table 1 that the surface hardness of the coating without the alloy transition layer is smaller than that of the solution with the alloy transition layer in each embodiment, which shows that the setting of the alloy transition layer can assist the surface stainless steel layer and improve the hardness of the coating.

[0063] In this embodiment, in order to study the stability of the stainless steel layer, its bonding strength was tested. The test scheme refers to the standard ASTM D4541. The test results are shown in Table 2.

[0064] Table 2 Bonding strength of carbon fiber roller surface coating obtained in each embodiment and comparative example Carbon fiber roller Bonding strength (MPa) Example 1 24.4 Example 2 25.1 Example 3 36.4 Example 4 37.2 Example 5 40.1 Example 6 45.8 Comparative Example 1 16.6 As can be seen from Table 2, in each embodiment of the present invention, the bonding strength of the stainless steel layer can reach more than 24 MPa, while the bonding strength of the coating in Comparative Example 1 without an alloy transition layer is only 16.6 MPa, which is less than the solution using an alloy transition layer in each embodiment, indicating that the setting of the alloy transition layer can help improve the bonding strength of the coating. By comparing Examples 3 and 4 with Examples 1 and 2, it can be seen that after forming the alloy transition layer, high temperature and high pressure treatment is carried out, which is beneficial to improving the bonding strength of the coating. Examples 5 and 6 show that after adding magnetic particles, the bonding strength of the coating is further improved, especially in Example 6, which independently forms a magnetic particle coating, which is more conducive to improving the bonding strength of the coating than mixing magnetic particles with alloy powder.

Claims

1. A carbon fiber workpiece with a stainless steel coating sprayed on its surface, characterized in that: The invention comprises a carbon fiber matrix, a resin layer arranged on the surface of the carbon fiber matrix, a transition layer formed on the surface of the resin layer, and a stainless steel layer formed on the surface of the transition layer.

2. The carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 1, characterized in that: The transition layer is a transition layer formed by alloy powder.

3. The carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 2, characterized in that: The alloy powder is doped with magnetic material powder.

4. The carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 1, characterized in that: The raw material of the stainless steel layer is any one of 304 stainless steel powder, 304L stainless steel powder, 316 stainless steel powder, and 316L stainless steel powder, or a mixture of several of them.

5. The carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 1, characterized in that: The thickness of the transition layer is greater than the thickness of the resin layer.

6. The carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 1, characterized in that: A sand layer is further formed between the carbon fiber matrix and the resin layer.

7. The carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 6, characterized in that: The sand layer is formed by spraying white corundum with a mesh size of 30 to 50.

8. The method for preparing a carbon fiber material workpiece with a stainless steel coating sprayed on the surface as claimed in claim 1, characterized in that: The steps include: S1. Providing a carbon fiber matrix; S2. Clean the substrate surface and sandblast to form a sand layer; S3. Spraying a hot-melt resin on the surface of the substrate having a sand layer to form a resin layer; S4. Spraying alloy powder on the surface of the resin layer to form a transition layer; S5. Spray stainless steel powder on the surface of the transition layer to form a stainless steel layer.

9. The method for preparing a carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 8, characterized in that: After step (4), and before forming the stainless steel layer, the workpiece is placed under high temperature and high pressure conditions for 20 to 40 minutes.

10. The method for preparing a carbon fiber material workpiece with a stainless steel coating sprayed on the surface according to claim 9, characterized in that: The high temperature and high pressure conditions are a temperature 10 to 35 degrees Celsius below the melting point of the resin and a pressure of 2 to 5 atmospheres.

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