Iron-based amorphous enhanced niCrFeMoBC multi-principal element alloy erosion resistant coating and method of manufacture and use thereof

Abstract

The application discloses an iron-based amorphous enhanced NiCrFeMoBC multi-main-element alloy anti-abrasion coating and a preparation method and application thereof. 60 Cr 40 Alloy and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 are mixed to obtain a laser cladding material; and the laser cladding material is cladded on a surface of a substrate by using a laser cladding technology to obtain the iron-based amorphous enhanced NiCrFeMoBC multi-main-element alloy anti-abrasion coating. The iron-based amorphous enhanced NiCrFeMoBC multi-main-element alloy anti-abrasion coating prepared by the application has a uniform and dense structure and no obvious defects, and with the addition of the iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2, the pitting resistance of the coating is strengthened, the hardness is continuously improved, the wear rate under a 3.5% sodium chloride corrosion solution is extremely low, and the iron-based amorphous enhanced NiCrFeMoBC multi-main-element alloy anti-abrasion coating is helpful to improve the anti-abrasion performance of a high-strength steel surface.

Description

Technical Field

[0001] This invention belongs to the field of wear and corrosion protection of high-strength steel surfaces, specifically relating to an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear and corrosion resistant coating, its preparation method and application. Background Technology

[0002] In recent years, high-strength steel has been widely used in moving parts of marine engineering equipment, playing an irreplaceable role in marine development and serving as a key material for achieving the national maritime power strategy. However, high-strength steel moving parts face severe corrosion and wear problems in the harsh marine environment during actual service, which restricts the long service life of high-strength steel structures. Therefore, obtaining a protective coating with excellent comprehensive wear and corrosion resistance is crucial for the long-term service of marine-related high-strength steel. Currently, the high hardness, wear resistance, and corrosion resistance of multi-principal element alloys provide more possibilities for designing long-term protective coatings for high-strength steel. At the same time, by utilizing laser cladding, a highly cost-effective surface modification technology, wear-resistant and corrosion-resistant alloy coatings can be produced on low-wear and easily corroded high-strength steel components, ultimately meeting the requirements for the long-term service of marine-related high-strength steel. Summary of the Invention

[0003] The main objective of this invention is to provide a wear-resistant coating of iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy, its preparation method and application, in order to overcome the shortcomings of the prior art.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this invention includes:

[0005] This invention provides a method for preparing a wear-resistant coating of an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy, comprising:

[0006] Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 is mixed to obtain a laser cladding material; wherein, the Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 The absolute value of the average particle size difference between the two C2 samples is ≤5μm;

[0007] Furthermore, the laser cladding material is clad onto the substrate surface using laser cladding technology to obtain an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating.

[0008] The present invention also provides an iron-based amorphous reinforced NiCrFeMoBC multi-principal alloy wear-resistant coating prepared by the aforementioned preparation method, wherein the grain size of the NiCrFeMoBC multi-principal alloy wear-resistant coating is 10-55 μm.

[0009] This invention also provides the application of the aforementioned iron-based amorphous reinforced NiCrFeMoBC multi-principal alloy wear-resistant coating in the field of wear-resistant protection of moving parts made of marine high-strength steel.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] (1) Fe in this invention 55 Cr 24 Mo 16 B 2.6 The larger size of C2 amorphous powder can retain part of the amorphous structure during the cladding process, which enhances the wear resistance of the coating. Some of the higher melting point elements can act as solidification heterogeneous nucleation sites during the cladding process, thus refining the grain size of the coating.

[0012] (2) Fe in this invention 55 Cr 24 Mo 16 B 2.6 The addition of C2 amorphous material avoids the segregation of lighter non-metallic elements (C and B elements) during the cladding process and reduces the reaction with residual air, thus preventing burn-off. A large number of non-metallic elements are evenly distributed in the cladding coating, resulting in a significant improvement in alloy hardness and wear resistance.

[0013] (3) Fe in this invention 55 Cr 24 Mo 16 B 2.6 The high Cr content (up to 24%) in C2 amorphous alloys enhances the passivation capability of multi-principal alloy coatings, while the 16% Mo content improves the pitting resistance of the passivation film. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figures 1a-1b These are electron microscope images of the clad alloy powder in Comparative Example 1 and Example 3 of the present invention;

[0016] Figures 2a-2eThese are electron microscope images of the coatings in Comparative Examples 1-2 and the NiCrFeMoBC multi-principal-element alloy wear-resistant coatings in Examples 1-3 of the present invention.

[0017] Figure 3 These are microhardness test images of the NiCrFeMoBC multi-principal-element alloy wear-resistant coatings in Examples 1-3 and Comparative Examples 1-2 of the present invention.

[0018] Figure 4 These are wear-resistant coatings of NiCrFeMoBC multi-principal-element alloys in Examples 1-3 of the present invention and coatings in Comparative Examples 1-2, which were subjected to wear damage test images. Detailed Implementation

[0019] In view of the deficiencies of the prior art, the inventors of this case, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution of this invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] Specifically, as one aspect of the technical solution of this invention, a method for preparing a wear-resistant coating of an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy includes:

[0021] Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 is mixed to obtain a laser cladding material; wherein, the Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 The absolute value of the average particle size difference between the two C2 samples is ≤5μm;

[0022] Furthermore, the laser cladding material is clad onto the substrate surface using laser cladding technology to obtain an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating.

[0023] In some preferred embodiments, the laser cladding material comprises the following components by mass percentage: 60–90% Ni 60 Cr 40 Alloys and 10-40% iron-based amorphous Fe 55 Cr 24 Mo16 B 2.6 C2.

[0024] In some preferred embodiments, the laser cladding material also includes unavoidable impurity elements.

[0025] In some preferred embodiments, the Ni 60 Cr 40 The particle size distribution of the alloy is 45–105 μm.

[0026] In some preferred embodiments, the iron-based amorphous Fe 55 Cr 24 Mo 16 The particle size distribution of B2.6C2 is 50–175 μm.

[0027] In some preferred embodiments, the preparation method specifically includes: using laser cladding technology, a coaxial powder-feeding laser is used to clad the laser cladding material onto the surface of a substrate preheated to 350–450°C to obtain an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating; wherein the laser power used in the laser cladding technology is 400–500W, the cladding scanning speed is 8–15 mm / s, the overlap rate is 25%–30%, the laser focal length is 17–18 mm, the powder feeding speed is 5–6 g / min, and both the powder feeding gas and the cladding protective gas are argon with a gas flow rate of 8–10 L / min.

[0028] In some preferred embodiments, the preparation method specifically includes: Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 is placed in a ball mill and mixed for 1-2 hours, then dried at 60-80°C for 2-3 hours to obtain the laser cladding material.

[0029] In some preferred embodiments, the preparation method further includes: sandblasting, cleaning, and drying the substrate before performing the cladding treatment.

[0030] Furthermore, the cleaning process includes cleaning the surface of the substrate obtained by sandblasting with alcohol.

[0031] In some preferred embodiments, the matrix includes any one of high-strength steel, low-carbon high-strength steel, and stainless steel, but is not limited thereto.

[0032] In some preferred embodiments, the method for preparing the iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating includes:

[0033] S1. Weigh out the powder (60-90% Ni) according to the component ratio. 60 Cr 40 Alloy powder, 10-40% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 Powder C is placed in a ball mill and mixed for 1-2 hours. The mixed powder is then dried in a drying oven at a constant 60°C for 2-3 hours. The average particle size difference between the two powders is ≤5μm.

[0034] S2. Sandblast the clad high-strength steel, wipe it with alcohol, and then dry it.

[0035] S3. Using a coaxial powder-feeding laser, the mixed powder is clad onto a high-strength steel surface preheated to a constant 400℃. The cladding conditions are as follows: laser power of 400-500W, cladding scanning speed of 10mm / s, overlap rate of 30%, laser focal length of 16.5mm, powder feeding speed of 5-6g / min, and both the powder feeding gas and the cladding protective gas are argon with a gas flow rate of 10L / min.

[0036] Another aspect of the present invention provides an iron-based amorphous reinforced NiCrFeMoBC multi-principal alloy wear-resistant coating prepared by the aforementioned preparation method, wherein the grain size of the NiCrFeMoBC multi-principal alloy wear-resistant coating is 10-55 μm.

[0037] This invention provides a wear-resistant coating for an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy, wherein the cladding powder of the coating comprises 60-90% Ni by mass. 60 Cr 40 Alloy, 10-40% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 powder and unavoidable impurity elements; the Ni 60 Cr 40 The alloy powder has a particle size distribution of 45–105 μm, and is an iron-based amorphous Fe. 55 Cr 24 Mo 16The particle size distribution of B2.6C2 powder is 50-175μm, and the average particle size difference between the two powders is ≤5μm. As a metastable alloy material, amorphous material crystallizes during the cladding process. Its larger powder size and some higher melting point elements can act as solidification heterogeneous nucleation sites during the cladding process, thus refining the grain size of the multi-principal element coating. At the same time, a large number of non-metallic elements are uniformly distributed in the cladding coating, which significantly improves the alloy's hardness and wear resistance. In addition, the high Cr content of up to 24% in amorphous material enhances the passivation ability of the multi-principal element alloy coating, while the 16% Mo content can improve the pitting corrosion resistance of the passivation film.

[0038] Another aspect of the present invention provides the use of the aforementioned iron-based amorphous reinforced NiCrFeMoBC multi-principal alloy wear-resistant coating in the field of wear-resistant protection of the surface of marine high-strength steel moving parts.

[0039] The wear-resistant coating of the iron-based amorphous reinforced NiCrFeMoBC multi-principal element alloy prepared by this invention has a uniform and dense microstructure with no obvious defects, and the microstructure is further improved by the iron-based amorphous Fe... 55 Cr 24 Mo 16 B 2.6 The addition of C2 enhances the coating's resistance to pitting corrosion and continuously improves its hardness. It also results in extremely low wear rate under 3.5% sodium chloride corrosion solution, which helps improve the wear and corrosion resistance of A100 high-strength steel surfaces.

[0040] The technical solution of the present invention will be further described in detail below with reference to several preferred embodiments and accompanying drawings. This embodiment is implemented on the premise of the technical solution of the invention, and provides detailed implementation methods and specific operation processes. However, the protection scope of the present invention is not limited to the following embodiments.

[0041] Unless otherwise specified, the experimental materials used in the examples below can be purchased from conventional biochemical reagent companies.

[0042] The following examples demonstrate the preparation of wear-resistant coatings of iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloys using the following methods:

[0043] S1. Weigh out 60-90% Ni according to its mass percentage. 60 Cr 40 Alloy powder, 10-40% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2;

[0044] S2. Place the weighed powder into a ball mill according to the component ratio and mix for 1-2 hours. Then dry the mixed powder in a drying oven at a constant 60°C for 2-3 hours.

[0045] S3. Sandblast the clad high-strength steel, wipe it with alcohol, and then dry it.

[0046] S4 uses a coaxial powder-feeding laser to clad the mixed powder onto a high-strength steel surface preheated to a constant 400℃. The cladding conditions are as follows: laser power of 400-500W, cladding scanning speed of 10mm / s, overlap rate of 30%, laser focal length of 16.5mm, powder feeding speed of 5-6g / min, and both the powder feeding gas and the cladding protective gas are argon with a gas flow rate of 10L / min.

[0047] Example 1:

[0048] The specific scheme of this implementation 1 is 90% Ni by mass. 60 Cr 40 Alloy powder and 10% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 powder was used to prepare a NiCrFeMoBC multi-principal-element alloy wear-resistant coating according to the above steps; wherein, the Ni 60 Cr 40 Alloy powder and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 The average particle size difference of C2 powder is 3 μm.

[0049] Example 2:

[0050] The specific scheme of this implementation 2 is 80% Ni by mass. 60 Cr 40 Alloy powder and 20% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 powder was used to prepare a NiCrFeMoBC multi-principal-element alloy wear-resistant coating according to the above steps; wherein, the Ni 60 Cr 40 Alloy powder and iron-based amorphous Fe 55 Cr 24 Mo 16 The average particle size difference of B2.6C2 powder is 3 μm.

[0051] Example 3:

[0052] The specific implementation scheme in this embodiment is 70% Ni by mass. 60 Cr 40 Alloy powder and 30% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6C2 powder was used to prepare a NiCrFeMoBC multi-principal-element alloy wear-resistant coating according to the above steps; wherein, the Ni 60 Cr 40 Alloy powder and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 The average particle size difference of C2 powder is 3 μm.

[0053] Comparative Example 1:

[0054] This comparative example only uses Ni 60 Cr 40 Alloy powder is used to prepare a laser cladding coating according to the steps described above.

[0055] Comparative Example 2:

[0056] The composition of this comparative example is equivalent to that of Example 3, as it directly uses iron-based amorphous Fe. 55 Cr 24 Mo 16 B 2.6 C2 coating uses elemental powders with the same composition: 55% Fe, 24% Cr, 16% Mo, 2.6% B, 2% C, and Ni. 60 Cr 40 Alloy powder is used as raw material, with the total mass ratio of elemental powder being 30%, Ni 60 Cr 40 The alloy powder accounts for 70%, and the laser cladding coating is prepared according to the above steps.

[0057] Characterization:

[0058] Electron micrographs of the cladding alloy powders in Comparative Example 1 and Example 3 are shown below. Figure 1a , Figure 1b As shown; electron microscope images of the coatings in Comparative Examples 1-2 and the NiCrFeMoBC multi-principal-element alloy wear-resistant coatings in Examples 1-3 are shown below. Figures 2a-2e As shown.

[0059] The NiCrFeMoBC multi-principal-element alloy wear-resistant coatings in Examples 1-3 and the coatings in Comparative Examples 1-2 were subjected to microhardness tests, and the results are as follows: Figure 3 As shown.

[0060] Using a corrosion friction machine, with a load of 10 N, a friction frequency of 3 Hz, a friction time of 0.5 h, and a corrosion solution of 3.5% NaCl, wear damage tests were conducted on the NiCrFeMoBC multi-principal element alloy wear-resistant coatings in Examples 1-3 and the coatings in Comparative Examples 1-2. The results are as follows: Figure 4 As shown.

[0061] Using an electrochemical workstation and a 3.5% NaCv corrosion solution, electrochemical corrosion tests were conducted on the NiCrFeMoBC multi-principal-element alloy wear-resistant coatings in Examples 1-3 and the coatings in Comparative Examples 1-2. The corrosion current densities are shown in Table 1.

[0062] Table 1 shows the electrochemical corrosion performance of the NiCrFeMoBC multi-principal-element alloy wear-resistant coatings in Examples 1-3 and the coatings in Comparative Examples 1-2.

[0063]

[0064]

[0065] The results above show that the addition of amorphous material significantly refines the grain size of the cladding coating. Hardness test results indicate that, compared to Ni in Comparative Example 1... 60 Cr 40 The coating achieved a hardness of 304 HV, while the coating in Comparative Example 2, with the same composition as Example 3, reached 329 HV. The hardness of the amorphous-reinforced coating increased continuously with increasing amorphous content, reaching 552 HV in Example 3; this represents an 81.6% increase compared to Comparative Example 1 and a 67.8% increase compared to Comparative Example 2. Abrasion and wear tests showed that the wear rate of the amorphous coating decreased continuously with increasing amorphous content, reaching only 5 × 10⁻⁶ HV in Example 3. -7 mm 3 / N m, far lower than the 4.1×10 of the coating in Comparative Example 1. -6 mm 3 / N m and Comparative Example 2 coating 5.4×10 -6 mm 3 / N m. Electrochemical corrosion performance shows that the corrosion current density of the amorphous coating increases slightly with the increase of amorphous content, but the resistance to pitting corrosion is improved during the passivation process. In contrast, the coating of Comparative Example 2, which is prepared directly from elemental powder, has a large number of pores due to the burning off of B and C elements, resulting in poor corrosion resistance.

[0066] In addition, the inventors of this case also conducted experiments with other raw materials, process operations, and process conditions described in this specification, referring to the aforementioned embodiments, and obtained relatively ideal results in all cases.

[0067] It should be understood that the technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made to the technical solutions of the present invention without departing from the spirit and scope of the claims are within the scope of protection of the present invention.

Claims

1. A method for preparing a wear-resistant coating of an iron-based amorphous reinforced NiCrFeMoBC multi-principal element alloy, characterized in that, include: Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 is mixed to obtain a laser cladding material; wherein, the Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 The absolute value of the average particle size difference between the two C2 samples is ≤5μm; Furthermore, the laser cladding material is clad onto the substrate surface using laser cladding technology to obtain an iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating.

2. The preparation method according to claim 1, characterized in that: The laser cladding material comprises the following components by mass percentage: 60–90% Ni 60 Cr 40 Alloys and 10-40% iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2; And / or, the laser cladding material also includes unavoidable impurity elements.

3. The preparation method according to claim 1, characterized in that: The Ni 60 Cr 40 The particle size distribution of the alloy is 45–105 μm.

4. The preparation method according to claim 1, characterized in that: The iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 The particle size distribution of C2 is 50–175 μm.

5. The preparation method according to claim 1, characterized in that, Specifically, it includes: Laser cladding technology is used to clad the laser cladding material onto the surface of a substrate preheated to 350–450°C using a coaxial powder-feeding laser, thereby obtaining a wear-resistant coating of iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy. The laser power used in the laser cladding technology is 400–500W, the cladding scanning speed is 8–15 mm / s, the overlap rate is 25%–30%, the laser focal length is 17–18 mm, the powder feeding speed is 5–6 g / min, and both the powder feeding gas and the cladding protective gas are argon with a gas flow rate of 8–10 L / min.

6. The preparation method according to claim 1, characterized in that, Specifically, it includes: Ni 60 Cr 40 Alloys and iron-based amorphous Fe 55 Cr 24 Mo 16 B 2.6 C2 is placed in a ball mill and mixed for 1-2 hours, then dried at 60-80°C for 2-3 hours to obtain the laser cladding material.

7. The preparation method according to claim 1, characterized in that, Also includes: Before performing the cladding process, the substrate is first sandblasted, cleaned, and dried. Preferably, the cleaning process includes cleaning the surface of the substrate obtained by sandblasting with alcohol.

8. The preparation method according to claim 1, characterized in that: The matrix includes any one of high-strength steel, low-carbon high-strength steel, and stainless steel.

9. The iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating prepared by the preparation method according to any one of claims 1-8, characterized in that: The grain size in the NiCrFeMoBC multi-principal alloy wear-resistant coating is 10–55 μm.

10. The use of the iron-based amorphous reinforced NiCrFeMoBC multi-principal-element alloy wear-resistant coating of claim 9 in the field of wear-resistant protection of moving parts of marine high-strength steel.

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