A method for preparing laser cladding composite materials for use in valves

Abstract

This invention relates to a method for preparing a laser cladding composite material for use in valves. The laser cladding composite material is a clad cored wire, and the composition of the clad cored wire is as follows (by weight percentage): Ni: 10-15%, Co: 5-10%, Cr: 10.0-13.0%, Mo: 1.0-2.5%, Ta: 0.1-0.5%, graphite: 2-3.5%, hard phase: 12-20%, with the remainder being Fe. The clad cored wire includes a wrapping tape and core powder, with the core powder wrapped by the wrapping tape. The composition of the clad cored wire is as follows (by weight percentage): The wrapping tape accounts for 30% of the clad cored wire, and the remaining part of the clad cored wire is core powder. The wrapping tape, by weight percentage, comprises Ni: 10-15%, Co: 6-8%, Mo: 2-4%, Cr: 15-20%, with the remainder being Fe. The remaining component of the clad cored wire is core powder. The cladding cored wire is prepared through steps including preparing the wrapping tape alloy liquid, preparing the wrapping tape, preparing the core powder, manufacturing the clad cored wire, bending the clad cored wire into coils, bundling, and packaging. This improves the wear resistance of the valve core sealing surface or is used for repairing worn valve core sealing surfaces.

Description

Technical Field

[0001] This invention belongs to the field of laser cladding applications, specifically relating to a method for preparing laser cladding composite materials for use in valves. Background Technology

[0002] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization and diversion, or overflow and pressure relief; they are widely used in industrial production, water supply systems, petrochemicals, power, metallurgy, and construction.

[0003] A valve mainly consists of a valve body and a valve core. The valve's operation is controlled by adjusting the relative position of the valve body and valve core. When the valve is closed, the sealing surfaces of the valve core and valve body are tightly fitted together. Adjusting the relative position of the valve body and valve core causes relative movement between their sealing surfaces, resulting in friction and wear, which alters the dimensions of these surfaces. When the wear accumulates to a certain level, the dimensional changes in the sealing surfaces when the valve is closed lead to a loose seal, causing leakage and reduced valve life. To improve valve life or facilitate repair after wear-induced valve failure, laser cladding technology can be used. Therefore, a laser cladding composite material needs to be developed to work in conjunction with this technology. Summary of the Invention

[0004] To improve the wear resistance of valve core sealing surfaces, or for repair after wear, a laser cladding composite material needs to be developed for use with laser cladding processes. This invention provides a method for preparing a laser cladding composite material for use in valves. To achieve the above objectives, the technical solution adopted by this invention is as follows: A method for preparing a laser cladding composite material for valve applications. The laser cladding composite material is a clad cored wire. The composition of the clad cored wire, by weight percentage, is: Ni: 10-15%, Co: 5-10%, Cr: 10.0-13.0%, Mo: 1.0-2.5%, Ta: 0.1-0.5%, graphite: 2-3.5%, hard phase: 12-20%, with the remainder being Fe. The clad cored wire includes a wrapping tape and core powder, with the core powder wrapped by the wrapping tape. By weight percentage, the wrapping tape accounts for 30% of the clad cored wire, and the remaining part is core powder. By weight percentage, the wrapping tape consists of Ni: 10-15%, Co: 6-8%, Mo: 2-4%, Cr: 15-20%, with the remainder being Fe. The preparation process is as follows: Step 1: Prepare the coating tape alloy liquid by adding the raw materials nickel, cobalt, iron, ferromolybdenum and ferrochrome into an induction furnace in a certain proportion to melt them and form the coating tape alloy liquid; Step 2: Preparation of the wrapping tape. The above-mentioned alloy liquid wrapping tape is continuously fed into the continuous casting machine to form a continuous casting billet. The continuous casting billet is hot-rolled into a blank plate with a thickness of 2~20mm, and the hot rolling temperature is controlled at 700~750℃. The blank plate is cold-rolled into a thin plate with a thickness of 0.1~1mm, and the thin plate is cut into wrapping tapes with a width of 15~50mm. Step 3: Prepare core powder. The raw materials, nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, tantalum powder, graphite powder, and hard phase powder, are mixed evenly in proportion to form core powder. Step 4: Fabricate the clad cored wire. While extruding the two sides of the wrapping strip in Step 2 into a strip tube, fill the strip tube with the core powder from Step 3 to form the clad cored wire. Step 5: Bend the cladding cored wire into a coil, bundle it, and package it for use in laser cladding.

[0005] The beneficial effects of the laser cladding composite material preparation method of this invention applied to valves: The graphite in the cladding layer formed by laser cladding composite material undergoes several transformations during the cladding process. A portion of the graphite powder with a certain particle size melts and diffuses on its surface, forming MC3-type carbides with elements such as Fe, Mo, and Cr. These carbides create hard phase points within the cladding layer, increasing its hardness and wear resistance. A portion of the graphite powder remains as granular graphite within the cladding layer, further enhancing wear resistance during valve core use. The hard phase, dispersed and embedded within the cladding layer, improves both hardness and wear resistance. Ni, Co, and Fe are the main components of the cladding layer, forming its matrix. A well-designed ratio of Ni, Co, and Fe facilitates the diffusion of elements from the cladding layer into the valve core matrix, forming a metallurgical bond. This metallurgical bond strengthens the bond between the cladding layer and the substrate, while also better embedding the graphite, hard phase, and hard phase points within the cladding matrix. This reduces graphite and hard phase shedding during use and extends service life.

[0006] The clad cored wire is configured as a wrapping tape and a core powder, with the core powder wrapped by the wrapping tape. The wrapping tape is composed of Ni, Co, Mo, Cr and Fe, and the crystal structure of this alloy is mainly face-centered cubic. The wrapping tape has a certain degree of plasticity, which facilitates the subsequent wrapping of the core powder and the diffusion of elements such as Ni, Co and Fe, which is beneficial to the formation of the transition layer. The wrapping tape wraps Ta, graphite and hard phase, avoiding contact with the laser spot. Melting is achieved through heat conduction, avoiding excessive temperature and preventing burn-off or over-melting of the hard phase and graphite.

[0007] The raw materials are melted in an induction furnace to prepare the cladding alloy liquid. A continuous casting billet is then formed, followed by hot rolling, cold rolling, and cutting to create a cladding strip of a specific thickness (0.1~1mm) and width (15~50mm). The core powder is uniformly mixed and extruded into the cladding strip. The high uniformity of the core powder composition, achieved through extrusion, prevents incomplete filling of the strip tube, which would cause core powder movement and reduce its uniformity. This improves the compositional uniformity of the cladding layer, further enhancing its performance.

[0008] Furthermore, based on the weight percentage of the core powder itself, the composition of the core powder is Ni: 10~15%, Co: 5~10%, Mo: 0.7~1.5%, Cr: 8~10%, Ta: 0.15~0.6%, graphite: 3~5%, hard phase: 18~25%, and the remainder is Fe.

[0009] Beneficial effects: By rationally designing the composition of the wrapping tape and core powder, the wrapping tape has sufficient plasticity and flexibility to meet the wrapping requirements, which is conducive to the stable embedding of hard phase and graphite in the cladding layer.

[0010] Furthermore, the hard phase is a mixture of TiC-Co and WC-Ni, wherein the ratio of TiC-Co to WC-Ni is 2:3.

[0011] Beneficial effects: The use of a 2:3 mixture of TiC-Co and WC-Ni as the hard phase is beneficial to improving the uniformity, hardness, and wear resistance of the hard phase in the cladding layer; the use of cobalt-coated titanium carbide and nickel-coated tungsten carbide, with nickel and cobalt acting as transition materials, improves the bonding strength between tungsten carbide and titanium carbide and the cladding layer matrix, preventing premature detachment during use and extending the valve core's lifespan.

[0012] Further, the TiC-Co is TiC-Co particles with Co attached to the surface of TiC, the particle size of the TiC-Co particles is 3000~5000 mesh, and the Co content of the TiC-Co particles is 40~50% by weight; the WC-Ni is WC-Ni particles with Ni attached to the surface of WC, the particle size of the WC-Ni particles is 3000~5000 mesh, and the Ni content of the WC-Ni particles is 40~50% by weight.

[0013] Beneficial effects: By rationally designing the content of cobalt in TiC-Co particles and nickel in WC-Ni particles, the bonding strength between tungsten carbide and titanium carbide and the cladding layer matrix can be improved. The particle size of TiC-Co particles and WC-Ni particles should be selected between 3000 and 5000 mesh. If the particle size is too fine, the hard particles will easily melt completely during the cladding process and will not play the role of the hard phase. If the particle size is too coarse, the hard particles will have poor dispersion in the cladding layer, low bonding strength with the cladding layer matrix, and will be easy to fall off.

[0014] Furthermore, in step 3, the particle size of the raw materials nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, and tantalum powder is controlled at 300-500 mesh, and the particle size of the graphite powder is controlled at 100-200 mesh.

[0015] Beneficial effects: During the cladding process, the raw materials, including nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, and tantalum powder, melt rapidly; the surface portion of graphite powder of a certain particle size melts and diffuses, forming MC3-type carbides with elements such as Fe, Mo, and Cr, forming hard phase points within the cladding layer, increasing the hardness and wear resistance of the cladding layer; a portion of the graphite powder of a certain particle size still exists in the cladding layer in the form of granular graphite; during the use of the valve core, graphite improves wear resistance.

[0016] Furthermore, when the wrapping tape is vortexed and extruded into a tube on both sides, the wrapping tape overlaps on both sides; and the clad cored wire is shaped, and the shaped clad cored wire has a rectangular cross-section.

[0017] Beneficial effects: The overlapping edges on both sides of the wrapping tape prevent the clad cored wire from bending into coils, being bundled, or cracking during packaging; the rectangular cross-section of the clad cored wire after plasticization, combined with the rectangular laser spot, improves the uniformity of the energy density received by the cladding wire, ensures uniform melting, and avoids localized overheating.

[0018] Furthermore, in step 2, the melting temperature of the alloy liquid wrapped with the coating is controlled at 1440~1510℃.

[0019] Beneficial effects: The melting temperature of the alloy liquid is controlled at 1440~1510℃, which keeps the alloy in a liquid state while preventing severe oxidation due to excessive temperature. Attached Figure Description

[0020] Figure 1 This is a scanning electron micrograph of the cladding layer of the laser cladding composite material prepared by the method of preparing laser cladding composite material for use in valves according to the present invention; Figure 2 The metallographic diagrams show the cladding layer, transition zone, and matrix of the laser cladding composite material prepared by the method of the present invention for use in valves. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1 of the preparation method of the laser cladding composite material for valves of the present invention: The laser cladding composite material is a clad cored wire. The composition of the clad cored wire is as follows, by weight percentage: Ni: 10~15%, Co: 5~10%, Cr: 10.0~13.0%, Mo: 1.0~2.5%, Ta: 0.1~0.5%, graphite: 2~3.5%, hard phase: 12~20%, and the remainder is Fe. The clad cored wire includes a wrapping tape and core powder. The core powder is wrapped by the wrapping tape. By weight percentage, the wrapping tape accounts for 30% of the clad cored wire, and the remaining part of the clad wire is core powder, accounting for 70% of the clad cored wire. By weight percentage of the wrapping tape itself, the composition of the wrapping tape is Ni: 10~15%, Co: 6~8%, Mo: 2~4%, Cr: 15~20%, and the remainder is Fe. In this embodiment, the composition of the core powder, by weight percentage, is as follows: Ni: 10-15%, Co: 5-10%, Mo: 0.7-1.5%, Cr: 8-10%, Ta: 0.15-0.6%, graphite: 3-5%, hard phase: 18-25%, and the remainder is Fe.

[0022] In the specific implementation process, the composition of the clad cored wire, by weight percentage, is: Ni: 12%, Co: 6.7%, Cr: 11.5%, Mo: 1.75%, Ta: 0.28%, graphite: 2.8%, hard phase: 17.5%, and the remainder is iron; of which, the wrapping tape accounts for 30% and the core powder accounts for 70%. By weight percentage of the wrapping tape itself, the composition of the wrapping tape is: Ni: 12%, Co: 6%, Mo: 3.5%, Cr: 18.5%, and the remainder is Fe. By weight percentage of the core powder itself, the composition of the core powder is: Ni: 12%, Co: 7%, Mo: 1.0%, Cr: 8.5%, Ta: 0.4%, graphite: 4%, hard phase: 25%, and the remainder is Fe.

[0023] In this embodiment, the hard phase is a mixture of TiC-Co and WC-Ni, with a ratio of 2:3 between TiC-Co and WC-Ni. The use of a 2:3 mixture of TiC-Co and WC-Ni as the hard phase is beneficial for improving the uniformity, hardness, and wear resistance of the hard phase in the cladding layer. Cobalt-coated titanium carbide and nickel-coated tungsten carbide are used, with nickel and cobalt acting as transition materials to improve the bonding strength between tungsten carbide and titanium carbide and the cladding layer matrix, preventing premature detachment during use and extending the valve core's lifespan.

[0024] Among them, TiC-Co refers to TiC-Co particles with Co attached to the surface of TiC, and the particle size of TiC-Co particles is 3000~5000 mesh. The Co content of TiC-Co particles is 40~50% by weight. WC-Ni refers to WC-Ni particles with Ni attached to the surface of WC, and the particle size of WC-Ni particles is 3000~5000 mesh. The Ni content of WC-Ni particles is 40~50% by weight. The particle size of TiC-Co particles and WC-Ni particles is selected to be 3000~5000 mesh. If it is too fine, the hard particles will easily melt completely during the cladding process and will not play the role of the hard phase. If it is too coarse, the hard particles will have poor dispersibility in the cladding layer, low bonding strength with the cladding layer matrix, and will be easy to fall off. In other embodiments, without considering the bonding strength between tungsten carbide and titanium carbide and the cladding layer matrix, the hard phase is TiC, WC, or a mixture of both, with a ratio of 2:3, instead of a mixture of TiC-Co and WC-Ni. Alternatively, the hard phase is a mixture of TiC-Co and WC-Ni, but the ratio of TiC-Co to WC-Ni is 1:2 instead of 2:3.

[0025] In terms of the weight percentage of the core powder itself, the 25% hard phase includes a mixture of 10% TiC-Co particles and 15% WC-Ni particles, with the TiC-Co particles and WC-Ni particles having a particle size of 4000 mesh; the TiC content of the 10% TiC-Co particles is 6%; and the WC content of the 15% WC-Ni particles is 9%.

[0026] The specific preparation method of laser cladding composite materials used in valves is as follows: The composition of the prepared clad cored wire is as follows (by weight percentage): Ni: 12%, Co: 6.7%, Cr: 11.5%, Mo: 1.75%, Ta: 0.28%, graphite: 2.8%, hard phase: 17.5%, and the remainder is iron; of which, the cladding tape accounts for 30% and the core powder accounts for 70%.

[0027] Step 1: Prepare the cladding tape alloy liquid. The cladding tape accounts for 30% of the cored wire. The raw materials nickel, cobalt, iron, ferromolybdenum, and ferrochrome are added to an induction furnace in a specific ratio and melted to form the cladding tape alloy liquid. In this embodiment, the specific elemental ratios of the raw materials by weight percentage of the cladding tape are: Ni: 12%, Co: 6%, Mo: 3.5%, Cr: 18.5%, with the remainder being Fe. That is, during the batching process, the calculated weight ratio (by weight) between the raw materials nickel:cobalt:iron:ferromolybdenum (50 ferromolybdenum):ferrochrome (50 ferrochrome) is 12:6:38:7:37. The cladding tape alloy liquid is prepared by adding and melting the raw materials according to this ratio.

[0028] In this embodiment, the melting temperature of the molten alloy for the wrapping tape is controlled between 1440 and 1510°C, specifically 1500°C, to keep the alloy in a liquid state while preventing severe oxidation due to excessive temperature. In other embodiments, provided that the raw materials for the wrapping tape alloy are completely melted, the melting temperature is 1480°C or 1510°C instead of 1500°C.

[0029] Step 2: Preparation of the wrapping tape. The above-mentioned molten alloy is continuously fed into a continuous casting machine to form a continuously cast billet. The billet is hot-rolled into a blank plate with a thickness of 2-20 mm, and the hot rolling temperature is controlled at 700-750℃. The blank plate is then cold-rolled into a thin plate with a thickness of 0.1-1 mm, and the thin plate is cut into wrapping tapes with a width of 15-50 mm. In this embodiment, the hot rolling temperature is controlled at 725℃, and the width of the cut wrapping tape is 30 mm; the thickness of the wrapping tape is 0.5 mm. In other examples, the required width and thickness of the wrapping tape are adjusted according to the ratio between the wrapping tape and the core powder.

[0030] Step 3: Prepare the core powder. The raw materials—nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, tantalum powder, graphite powder, and hard phase powder—are mixed evenly in a specific ratio to form the core powder. In this embodiment, the core powder composition by weight percentage is: Ni: 12%, Co: 7%, Mo: 1.0%, Cr: 8.5%, Ta: 0.4%, graphite: 4%, hard phase: 25%, with the remainder being Fe. Specifically, during the batching process, the calculated weight ratio of the raw materials—nickel powder:cobalt powder:iron powder:ferromolybdenum powder (50g):ferrochrome powder (50g):tantalum powder:graphite powder:hard phase powder—is 12:7:32.6:2:17:0.4:4:25. The mixture is added to a mixer according to this ratio and mixed evenly to form the core powder.

[0031] The particle size of the raw materials—nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, and tantalum powder—is controlled between 300 and 500 mesh, specifically 400 mesh. The particle size of the graphite powder is controlled between 100 and 200 mesh, specifically 100 mesh. During the cladding process, the raw materials—nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, and tantalum powder—melt rapidly. A portion of the graphite powder of a certain particle size melts and diffuses, forming MC3-type carbides with elements such as Fe, Mo, and Cr. These carbides form hard phase points within the cladding layer, increasing its hardness and wear resistance. A portion of the graphite powder of a certain particle size also exists in the cladding layer as granular graphite. During valve core use, graphite improves wear resistance. In other embodiments, the particle size of the raw materials nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, and tantalum powder is 300 mesh or 500 mesh instead of 400 mesh, and the particle size of the graphite powder is 150 mesh or 200 mesh instead of 100 mesh.

[0032] Step 4: Fabricate the clad cored wire. While extruding the two sides of the wrapping tape from Step 2 into a tube, fill the tube with the core powder from Step 3 to form the clad cored wire. Adjust the overlap width of the wrapping tape to ensure the ratio of wrapping tape to core powder in the clad cored wire is 3:7, thus meeting the composition requirements. Shape the clad cored wire to a rectangular cross-section. This rectangular cross-section, combined with the rectangular laser spot, improves the uniformity of the energy density received by the clad wire, ensuring uniform melting and preventing localized overheating.

[0033] Step 5: Bend the cladding cored wire into a coil, bundle it, and package it for laser cladding.

[0034] The laser cladding composite material prepared using this invention is used to improve or repair valve cores in laser cladding processes. The surface portion of the graphite particles in the cladding layer melts and diffuses, forming MC3-type carbides with elements such as Fe, Mo, and Cr. These carbides form hard phase points within the cladding layer, increasing its hardness and wear resistance. A portion of the graphite powder, of a certain particle size, exists in the cladding layer as granular graphite. During valve core use, the graphite improves wear resistance. The hard phase is dispersed and embedded within the cladding layer, such as... Figure 1 As shown, the hard phase is represented by regularly shaped white dots in the figure; it improves the wear resistance of the cladding layer while increasing its hardness. Ni, Co, and Fe are the main components of the cladding layer, forming the cladding layer matrix. A well-designed ratio of Ni, Co, and Fe facilitates the diffusion of elements from the cladding layer into the valve core matrix, forming a transition layer, as shown in Figure 2. The upper part of the transition layer is the cladding layer, and the lower part is the substrate. There is no clear boundary between the cladding layer and the substrate, forming a transition layer that achieves metallurgical bonding. This metallurgical bonding improves the strength between the cladding layer and the substrate, while also better embedding graphite, the hard phase, and the hard phase-forming points within the cladding layer matrix; reducing the shedding of graphite and the hard phase during use; and increasing service life.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing laser cladding composite materials for use in valves, characterized in that, The laser cladding composite material is a clad cored wire. The composition of the clad cored wire, by weight percentage, is: Ni: 10~15%, Co: 5~10%, Cr: 10.0~13.0%, Mo: 1.0~2.5%, Ta: 0.1~0.5%, graphite: 2~3.5%, hard phase: 12~20%, with the remainder being Fe. The clad cored wire includes a wrapping tape and core powder, with the core powder wrapped by the wrapping tape. By weight percentage, the wrapping tape accounts for 30% of the clad cored wire, and the remaining part is core powder. By weight percentage, the wrapping tape consists of Ni: 10~15%, Co: 6~8%, Mo: 2~4%, Cr: 15~20%, with the remainder being Fe. The preparation process is as follows: Step 1: Prepare the coating tape alloy liquid by adding the raw materials nickel, cobalt, iron, ferromolybdenum and ferrochrome into an induction furnace in a certain proportion to melt them and form the coating tape alloy liquid; Step 2: Preparation of the wrapping tape. The above-mentioned alloy liquid wrapping tape is continuously fed into the continuous casting machine to form a continuous casting billet. The continuous casting billet is hot-rolled into a blank plate with a thickness of 2~20mm, and the hot rolling temperature is controlled at 700~750℃. The blank plate is cold-rolled into a thin plate with a thickness of 0.1~1mm, and the thin plate is cut into wrapping tapes with a width of 15~50mm. Step 3: Prepare core powder. The raw materials, nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, tantalum powder, graphite powder, and hard phase powder, are mixed evenly in proportion to form core powder. Step 4: Fabricate the clad cored wire. While extruding the two sides of the wrapping strip in Step 2 into a strip tube, fill the strip tube with the core powder from Step 3 to form the clad cored wire. Step 5: Bend the cladding cored wire into a coil, bundle it, and package it for use in laser cladding.

2. The method for preparing laser cladding composite material for use in valves according to claim 1, characterized in that, Based on the weight percentage of the core powder itself, the composition of the core powder is Ni: 10~15%, Co: 5~10%, Mo: 0.7~1.5%, Cr: 8~10%, Ta: 0.15~0.6%, graphite: 3~5%, hard phase: 18~25%, and the remainder is Fe.

3. The method for preparing laser cladding composite material for use in valves according to claim 1, characterized in that, The hard phase is a mixture of TiC-Co and WC-Ni, wherein the ratio of TiC-Co to WC-Ni is 2:

3.

4. The method for preparing laser cladding composite material for use in valves according to claim 3, characterized in that, The TiC-Co is TiC-Co particles with Co attached to the surface of TiC, the particle size of the TiC-Co particles is 3000~5000 mesh, and the Co content of the TiC-Co particles is 40~50% by weight; the WC-Ni is WC-Ni particles with Ni attached to the surface of WC, the particle size of the WC-Ni particles is 3000~5000 mesh, and the Ni content of the WC-Ni particles is 40~50% by weight.

5. The method for preparing laser cladding composite material for use in valves according to claim 3, characterized in that, The particle size of the raw materials nickel powder, cobalt powder, iron powder, ferromolybdenum powder, ferrochrome powder, and tantalum powder in step 3 is controlled at 300-500 mesh, and the particle size of the graphite powder is controlled at 100-200 mesh.

6. The method for preparing laser cladding composite material for use in valves according to claim 5, characterized in that, When the wrapping tape is vortexed and extruded into a tube on both sides, the wrapping tape overlaps on both sides; and the clad cored wire is shaped, and the shaped clad cored wire has a rectangular cross-section.

7. The method for preparing laser cladding composite material for use in valves according to claim 5, characterized in that, In step 2, the melting temperature of the alloy liquid is controlled at 1440~1510℃.

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