A method for preparing a vertical roll surface laser cladding anti-sticking steel coating

Abstract

The application discloses a preparation method of a vertical roll surface laser cladding anti-sticking steel coating, and comprises the following steps: accurately quantifying the surface morphology of the vertical roll anti-sticking steel coating and laser process parameters, that is, forming a heat dissipation channel size control equation based on a Gaussian heat source model and an elliptical double-Beta spray gun model, determining corresponding cladding process parameters according to size parameters of the related service performance requirements of the vertical roll surface coating, and thus realizing controllable preparation of the spiral line-shaped anti-sticking steel coating. Through effective control of the spiral line diameter of the coating, the size and shape of the protrusions and grooves, the high-temperature wear resistance of the coating is ensured, the friction between the steel pipe and the vertical roll is reduced, the occurrence of the anti-sticking phenomenon is prevented, and the service life of the vertical roll is prolonged.

Description

Technical Field

[0001] This invention relates to the field of laser cladding coating technology. More specifically, this invention relates to a method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller. Background Technology

[0002] After being rolled at high temperatures, seamless steel pipes require conveyor rollers for transport. Vertical rollers work in conjunction with the conveyor rollers to correct pipe deviation. Currently, vertical rollers are generally made of ordinary carbon steel, while the temperature of the steel pipes they contact can reach 700-1100℃. During high-speed transport, the vertical rollers are subjected to friction, collision, and compression from the high-temperature steel pipes, making them prone to steel adhesion. This can scratch subsequent transported steel pipes, affecting their surface quality and potentially forcing production line shutdowns, reducing production efficiency and increasing production costs. Applying a high-temperature wear-resistant coating to the surface of the vertical rollers is an effective method to solve the problem of steel adhesion and extend their service life. Simultaneously, the coating process allows for the remanufacturing of failed vertical rollers, further reducing production costs and contributing significantly to energy conservation and emission reduction.

[0003] Laser cladding technology adds cladding material by feeding powder or pre-preparing powder, and uses a high-energy-density laser beam to fuse the cladding material and a thin layer on the substrate surface together, forming a metallurgically bonded, dense, and fine-grained cladding layer that significantly improves the wear resistance, corrosion resistance, heat resistance, and oxidation resistance of the substrate surface. This technology causes minimal thermal damage to the substrate, has high coating-substrate bonding strength, and is a low-energy-consumption, highly automated, and green surface treatment technology. Laser cladding technology enables the rapid preparation of coatings on vertical roller surfaces.

[0004] The performance of the coating on the vertical roller surface is influenced not only by its composition and microstructure but also by its size and shape. During the cladding process, the laser beam moves at a constant linear speed along the axial direction on the vertical roller surface, while the roller rotates at a constant speed. This combined motion creates a spiral-like coating. To avoid exposing the substrate, adjacent spirals should overlap. The coating thickness and overlap width determine the diameter of the spiral and the width of the grooves and protrusions. If the coating is too thin and the spirals are dense, the heat dissipation channels are small, hindering heat flow. Even with high coating hardness, it cannot effectively prevent steel adhesion. If the spirals are too sparse, the stress concentration at the coating tip is too high, making the coating prone to wear and failure. Therefore, to ensure the high-temperature wear resistance of the coating on the vertical roller surface, the size and shape of the coating must be effectively controlled.

[0005] This invention addresses the technical problems existing in the prior art by proposing a design and preparation method for a spiral anti-sticking steel coating on the surface of a vertical roller based on laser cladding technology. By effectively controlling the size and shape of the coating spiral diameter, grooves, and protrusions, the friction between the steel pipe and the vertical roller is reduced while ensuring the high-temperature wear resistance of the coating, preventing the steel sticking phenomenon and extending the service life of the vertical roller. Summary of the Invention

[0006] One objective of this invention is to solve the technical problem of steel sticking to the surface of vertical rollers during service. This invention provides a method for preparing a laser-coated anti-sticking coating on the surface of vertical rollers. By effectively controlling the diameter of the coating spiral and the size and shape of the protrusions and grooves, the friction between the steel pipe and the vertical roller is reduced while ensuring the high-temperature wear resistance of the coating, preventing the steel sticking phenomenon and extending the service life of the vertical roller.

[0007] To address the aforementioned technical problems, this invention provides a method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller, comprising: accurately quantifying the surface morphology and laser process parameters of the anti-stick steel coating on the vertical roller, namely, forming a heat dissipation channel size control equation based on a Gaussian heat source model and an elliptical double beta spray gun model, and determining the corresponding cladding process parameters according to the size parameters of the relevant service performance requirements of the coating on the surface of the vertical roller, thereby achieving controllable preparation of a spiral anti-stick steel coating.

[0008] Preferably, before preparing the anti-stick steel coating, the coating powder is pretreated, and the particle size distribution after pretreatment is 30μm-90μm. The selected vertical roller material includes alloy steel with a diameter range of 30mm-200mm. The vertical roller is surface treated before laser cladding, and the surface roughness Ra of the vertical roller is not greater than 6μm.

[0009] Preferably, an elliptical double-beta spray gun model is used, where the bottom surface of the spraying area is a standard ellipse, and the coating thickness follows a beta distribution along both the major and minor axes of the ellipse; the maximum height of the heat dissipation channel... for: ; Among them, H is the thickness of the cladding layer; Overlap rate; distance r from the center of the light spot; based on the overlap rate requirement, the maximum height of the heat dissipation channel can be obtained. Size range: 100μm-500μm.

[0010] Preferably, the thickness of the anti-stick steel coating is determined by the laser cladding linear speed and the vertical roller rotation speed (i.e., the substrate rotation speed) when the powder feeding parameters are fixed. Using a Gaussian heat source model, assuming the laser power density follows a Gaussian distribution, the outer contour of the cladding layer cross-section is an ellipse with a single-pass melt width of 2r and a height of H, and the substrate melting area (i.e., the laser spot size) is given, the formula relating the thickness to the thickness / coating heat dissipation channel is: ; Among them, the effective utilization rate of powder K, Powder feeding efficiency, r is the distance from the center of the light spot, and H is the thickness of the cladding layer. Powder density, Matrix radius, Matrix rotation speed, Laser cladding linear velocity; the coating thickness H is determined by the relationship between the laser cladding linear velocity and the substrate rotation speed, with a size range of 500μm-2500μm.

[0011] Preferably, the width of the cladding layer is equal to the diameter of the laser spot. The laser energy at a distance *r* from the center of the spot must be sufficient to just melt the powder, thus achieving optimal cladding efficiency. This is the energy required per unit time for the powder stream to heat from ambient temperature to melting. and laser energy satisfy The relationship between the two can be established as follows: ; in, The shielding effect of powder on laser light. Laser absorption rate of powder Emission rate, Stefan-Boltzmann constant, Heat exchange coefficient, Powder specific heat Latent heat of fusion of powder, T is the melting temperature of powder. Ambient temperature, Powder particle size, The time it takes for the powder to travel from the nozzle to the substrate. Powder density; Meanwhile, the relationship between the laser energy density I(r) and the energy at a distance r from the center of the laser spot is as follows: ; Among them, P laser power, Laser spot radius, r is the distance from the center of the spot; Meanwhile, the powder's shielding rate against the laser The following factors affect the powder delivery rate: ; Where h is the distance from the powder feeder to the substrate. The average flight speed of the powder.

[0012] Preferably, the relationship between the laser power P and the distance r from the center of the laser spot during further processing determines the geometric characteristics of the anti-sticking steel coating on the vertical roller. The relationship between the laser power P and the distance r from the center of the laser spot can be obtained as follows: ; Based on the physical properties of the coating material, for a laser spot with a set diameter, the minimum laser power is calculated in order to ensure that the width of the cladding layer is not less than the diameter of the laser spot; the energy required for laser cladding is in the range of 1kW-5kW.

[0013] Preferably, based on thermo-coupling simulation calculations, when the height of the heat dissipation channel is 20-30% of the maximum coating thickness, the spiral linear coating exhibits the best wear resistance and anti-stick properties, achieved through overlap ratio... The scanning speed of the robotic arm can be calculated. The formula is as follows: ,in The diameter of the laser spot. The laser spot radius; Based on the requirements for the anti-stick steel coating on the vertical roller, the scanning speed of the robotic arm The range is 0.01m / s-0.2m / s.

[0014] The present invention has at least the following beneficial effects: 1. This invention can determine the corresponding cladding process parameters based on the dimensional parameters of the service performance requirements of the surface coating of the vertical roller for high temperature wear resistance and non-sticking, thereby realizing the controllable preparation of the spiral coating and maximizing the service life of the vertical roller.

[0015] 2. By effectively controlling the diameter of the coating spiral and the size and shape of the protrusions and grooves, this invention ensures the high-temperature wear resistance of the coating while reducing the friction between the steel pipe and the vertical roller, preventing the steel sticking phenomenon, and extending the service life of the vertical roller.

[0016] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0017] Figure 1 The overlap rate of this invention Schematic diagram of laser cladding coating; Figure 2 The overlap rate of this invention Schematic diagram of laser cladding coating; Figure 3 This is a diagram illustrating the calculation model for the heat dissipation channel height of the coating in this invention. Figure 4 These are macroscopic morphology images of the heat dissipation channel coatings at different heights according to the present invention; Figure 5 These are cross-sectional views of the heat dissipation channel coatings at different heights according to the present invention; Figure 6 This describes the macroscopic morphology of the spiral coating of the present invention; Figure 7 This is the microstructure of the coating of the present invention; Figure 8 This is the hardness distribution of the coating of the present invention. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this invention, the invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0019] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] This invention presents a design method for spiral-shaped coatings based on laser cladding technology. Based on a Gaussian heat source model and an elliptical double-beta spray gun model, a heat dissipation channel size control equation is established, and the correspondence between cladding process parameters and coating morphology is established, enabling controllable preparation of spiral-shaped coatings. Based on thermo-mechanical coupling analysis, the optimal spiral-shaped coating size is determined, maximizing the performance and service life of the vertical roller. Through analysis of the vertical roller's operating conditions and materials, the surface morphology and process parameters of the anti-stick steel coating on the vertical roller are precisely quantified, and a design standard for a high-efficiency anti-stick steel coating is obtained by changing the coating surface morphology.

[0021] Before coating preparation, the vertical roller needs to undergo surface pretreatment, including grinding, cleaning to remove oil, and then drying and maintaining cleanliness. Laser cladding results in a low dilution rate, a small coating transition zone, and a substrate surface morphology with a certain degree of genetic characteristics, which to some extent determines the surface quality of the cladding coating. The calculation of the anti-sticking steel parameters for the vertical roller is based on the selection of different anti-sticking steel coating materials. After pretreatment, the coating powder has a particle size distribution of 30μm-90μm. The selected vertical roller materials include, but are not limited to, alloy steel with a diameter range of 30mm-200mm. Before laser cladding, the vertical roller undergoes surface treatment, and the surface roughness Ra of the roller is no greater than 6μm.

[0022] Under the rotational motion of the substrate and the linear motion of the laser beam, the laser cladding coating is formed by the overlap of multiple cladding passes. In multi-pass cladding, the ratio of the overlap width L1 between adjacent cladding passes to the width L of a single cladding layer is the overlap rate. ,like Figure 1 and Figure 2 The diagram shows laser cladding coatings with different overlap rates. The coating thickness and overlap rate together control the size and shape of the resulting spiral, determining the size of the heat dissipation channel at the coating overlap. Therefore, in order to obtain a spiral with optimal size and shape, it is necessary to establish the correspondence between process parameters and coating morphology.

[0023] To ensure the size of the heat dissipation channel and the overlap rate If the thickness is much less than 50%, it can be assumed that the thickness of a single coating layer is not affected by the overlap of subsequent cladding layers. To simplify the establishment of the geometric characteristic parameters of the cladding layer, it is assumed that the laser beam energy and powder beam concentration distribution along the direction perpendicular to the substrate remain unchanged, and the powder distribution is uniform; it is assumed that the laser power density follows a Gaussian distribution, and the energy density distribution gradually decreases from the center to the edge; it is assumed that the outer contour of the cladding layer cross-section is elliptical, and the size of the substrate melting area is the size of the laser spot.

[0024] In the laser cladding process for anti-stick steel on vertical rolls, the cooling rate of the molten pool is much higher than that of traditional cladding, resulting in an extremely low coating dilution rate. During the rapid heating and cooling process, if unevenness on the substrate surface cannot be melted away under effective energy, it will affect the surface quality of the cladding coating.

[0025] In the laser cladding process, without considering the impact of substrate melting and dilution on coating quality, the effectively utilized powder mass can be regarded as the coating mass. Assuming the cladding coating morphology is a semi-ellipse with a single-pass melt width of 2r and a height of H, under the premise that the laser power fully melts the powder, the cladding layer mass balance equation is: ; Among them, the effective utilization rate of powder K, Powder feeding efficiency, t (laser action time), r (distance from the center of the laser spot), and H (cladding layer thickness) are all related to the laser's action time. Powder density, Laser cladding line speed.

[0026] Note: For the preparation of the cladding coating on the surface of the vertical roller, the cladding linear velocity... laser beam scanning speed The laser beam scanning speed is tens or even hundreds of times faster than the substrate rotation speed, so the influence of the laser beam scanning speed on the cladding layer morphology can be ignored. The relationship between the laser cladding linear velocity and the substrate rotation speed is as follows: ; in, Matrix radius, Matrix rotation speed; It can be seen that the thickness of the cladding layer is: The coating thickness (H) is determined by the relationship between linear velocity and substrate rotation speed, with a size range of 500μm-2500μm.

[0027] The boundary of the cladding layer is located at the furthest point from the center of the laser beam that can melt the powder. To achieve maximum cladding efficiency, the width of the cladding layer should be equal to the diameter of the laser spot. The laser power density exhibits a Gaussian distribution, with high energy density at the center. As the distance from the center of the spot increases, the energy density gradually decreases. The relationship between the laser energy density I(r) and the energy at a distance r from the center of the spot is as follows: ; Among them, P laser power, The laser spot radius is r, which is the distance from the center of the laser spot.

[0028] To achieve optimal cladding efficiency, the width of the cladding layer should be equal to the laser spot diameter, and the laser energy at a distance *r* from the center of the spot must be sufficient to just melt the powder. That is, the energy required per unit time for the powder stream to heat from ambient temperature to melting point. and laser energy satisfy The relationship between the two can be established as follows: ; in, The shielding effect of powder on laser light. Laser absorption rate of powder Emission rate, Stefan-Boltzmann constant, Heat exchange coefficient, Powder specific heat Latent heat of fusion of powder, T is the melting temperature of powder. Ambient temperature.

[0029] Among them, the powder's shielding rate against the laser The specific effects are as follows, influenced by factors such as powder delivery rate: ; Where h is the distance from the powder feeder to the substrate. The average flight speed of the powder.

[0030] The specific parameters of the iron-based powder used for the steel bonding coating are shown in Table 1 below: Among them, powder density, powder particle size, powder specific heat, latent heat of fusion, laser absorptivity, Stefan-Boltzmann constant, heat exchange coefficient, and emissivity are the commonly used physical property parameters of iron-based metal powders for vertical roller repair in the industry.

[0031] The ambient temperature, working distance, powder delivery rate, flight time, and flight speed are average values ​​obtained from multiple experimental measurements.

[0032] The working distance and flight speed are the optimal parameters obtained through multiple laser cladding experiments on the surface of vertical rollers. The optimal parameters were obtained by using the response surface methodology for multi-parameter optimization.

[0033] Table 1. Specific parameters of the iron-based powder used for steel bonding coating, formulas (1) to (5). For a laser spot with a diameter of 2 mm, in order for the cladding layer width to be equal to the laser spot diameter, the laser energy should satisfy equation (5), and the relationship between the laser power P and the distance r from the center of the spot can be obtained as follows: ; Substituting the parameters from Table 1 above, we get: ; For a laser spot with a diameter of 2mm, we can obtain: That is, to ensure that the width of the cladding layer is not less than the diameter of the laser spot, the laser power should be no less than 1133W. The energy range required for laser cladding is 1kW-5kW. In further processing, the relationship between the laser power P and the distance r from the center of the spot determines the geometric characteristics of the anti-stick steel coating on the vertical roller.

[0034] To further describe the coating thickness distribution, an elliptical double-beta spray gun model is adopted. This model is a coating thickness distribution function for a spray gun with an elliptical base, and is widely used in coating model building. This model assumes that the base of the sprayed area is a standard ellipse, and the coating thickness follows a beta distribution along both the major and minor axes of the ellipse. Figure 3 As shown, perpendicular to the direction of laser beam movement, the coating thickness on any interface satisfies: .

[0035] The coating thickness at the overlap is: ; The maximum height of the heat dissipation channel for: ; Substituting equation (3) into equation (11) yields the maximum height of the heat dissipation channel. Size range: 100μm-500μm.

[0036] Based on thermo-coupling simulation calculations, the spiral linear coating can have the best wear resistance and anti-stick properties when the height of the heat dissipation channel is 20-30% of the maximum coating thickness.

[0037] By overlap rate The scanning speed of the robotic arm can be calculated. The formula is as follows: ,in The diameter of the laser spot. The laser spot radius. Considering the requirements for the anti-stick steel coating on the vertical roller, the robotic arm scanning speed... The range is 0.01m / s-0.2m / s.

[0038] The surface roughness of the coating and the height of the heat dissipation channel formed by the overlap are adjusted by controlling the laser cladding process parameters. These process parameters include laser power, powder feeding rate, scanning speed, and overlap rate. The laser power ranges from 1kW to 5kW, the powder feeding rate ranges from 0.1g / s to 2.0g / s, the scanning speed ranges from 0.01m / s to 0.2m / s, and the overlap rate ranges from 10% to 80%. Specific implementation examples: The substrate was selected from 45# steel rods with a diameter of 50mm, and the powder material was selected from FeCr alloy powder, the composition of which is shown in Table 2. A YLS-4000-KC laser with a spot diameter of 2mm was used. According to formula (5), the process parameters for preparing a cladding coating with a thickness of approximately 1.5mm and a heat dissipation channel height of 1.2mm are shown in Table 3. The coating thickness and the width of the heat dissipation channel were calculated using the above formulas, and the laser power, powder feeding rate, and scanning speed were selected from commonly used empirical parameters in the industry.

[0040] Table 2 Chemical composition of FeCr alloy powder Table 3. Height of heat dissipation channels under different process parameters The macroscopic morphology and cross-sectional views of the cladding coating with heat dissipation channel heights Δh of 1.085 mm, 1.124 mm, and 0.201 mm are shown in the following figures. Figure 4 and Figure 5 As shown, under the three sets of dimensional parameters, the coating thickness and heat dissipation channel height calculated according to the formula are basically consistent with the actual values, and the trend of change is correct. Figure 5 In the middle, the heights of the three heat dissipation channels are Δh=1419μm; Δh=1523μm; and Δh=1353μm, respectively.

[0041] Based on the second set of process parameters, optimization was performed with a laser power of 2kW and a powder feed rate of 2.5×10⁻⁶. -3 A spiral coating was prepared on the surface of the vertical roller at a rate of kg / s, such as Figure 6 As shown, the experimental results obtained from the second set of parameters are close to the expected data. The laser power and powder feed rate were further adjusted using equations (7) and (8), with the specific values ​​being the optimized parameters obtained using the response surface methodology. The coating microstructure is shown in [the diagram]. Figure 7 As shown. The coating hardness distribution is shown in the figure. Figure 8 As shown. Coating structure and coating hardness are key areas of focus in the vertical roll surface repair and cladding industry. Figure 7 and Figure 8 This demonstrates that the coating obtained by the optimized parameters not only meets the requirements for external dimensions, but also meets industry requirements for internal structure and hardness.

[0042] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention, and other modifications can be easily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller, characterized in that, include: The surface morphology and laser process parameters of the anti-stick steel coating on the vertical roller are precisely quantified. Specifically, the heat dissipation channel size control equation is formed based on the Gaussian heat source model and the elliptical double beta spray gun model. The corresponding cladding process parameters are determined according to the size parameters of the relevant service performance requirements of the coating on the vertical roller surface. An elliptical double-beta spray gun model is adopted, meaning the bottom surface of the spraying area is a standard ellipse, and the coating thickness follows a beta distribution along both the major and minor axes of the ellipse; the maximum height of the heat dissipation channel is [not specified]. for: ； Among them, H is the thickness of the cladding layer; Overlap rate; distance r from the center of the light spot; based on the overlap rate requirement, the maximum height of the heat dissipation channel can be obtained. Size range: 100μm-500μm; The thickness of the anti-stick steel coating is determined by the laser cladding linear speed and the vertical roller rotation speed (i.e., the substrate rotation speed) when the powder feeding parameters are fixed. Using a Gaussian heat source model, assuming the laser power density follows a Gaussian distribution, the outer contour of the cladding layer cross-section is an ellipse with a single-pass melt width of 2r and a height of H, and the substrate melting area (i.e., the laser spot size) is considered, the formula relating the thickness to the thickness / coating heat dissipation channel is: ； Among them, the effective utilization rate of powder K, Powder feeding efficiency, r is the distance from the center of the light spot, and H is the thickness of the cladding layer. Powder density, Matrix radius, Matrix rotation speed, Laser cladding linear velocity; the coating thickness H is determined by the relationship between the laser cladding linear velocity and the substrate rotation speed, with a size range of 500μm-2500μm.

2. The method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller as described in claim 1, characterized in that, Before the preparation of the anti-stick steel coating, the coating powder is pretreated and the particle size distribution after pretreatment is 30μm-90μm. The selected vertical roller material includes alloy steel with a diameter range of 30mm-200mm. The vertical roller is surface treated before laser cladding, and the surface roughness Ra of the vertical roller is not greater than 6μm.

3. The method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller as described in claim 1, characterized in that, The width of the cladding layer is equal to the diameter of the laser spot. The laser energy at a distance *r* from the center of the spot must be sufficient to just melt the powder, thus achieving optimal cladding efficiency. This is the energy required per unit time for the powder stream to heat from ambient temperature to melting. and laser energy satisfy The relationship between the two can be established as follows: ; in, The shielding effect of powder on laser light. Laser absorption rate of powder Emission rate, Stefan-Boltzmann constant, Heat exchange coefficient, Powder specific heat Latent heat of fusion of powder, T is the melting temperature of powder. Ambient temperature, Powder particle size, The time it takes for the powder to travel from the nozzle to the substrate. Powder density; Meanwhile, the relationship between the laser energy density I(r) and the energy at a distance r from the center of the laser spot is as follows: ； Among them, P laser power, Laser spot radius, r is the distance from the center of the spot; Meanwhile, the powder's shielding rate against the laser The following factors affect the powder delivery rate: ； Where h is the distance from the powder feeder to the substrate. The average flight speed of the powder.

4. The method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller as described in claim 3, characterized in that, In further processing, the relationship between laser power P and distance r from the center of the laser spot determines the geometric characteristics of the anti-sticking steel coating on the vertical roller. The relationship between laser power P and distance r from the center of the laser spot can be obtained as follows: ； Based on the physical properties of the coating material, for a laser spot with a set diameter, the minimum laser power is calculated in order to ensure that the width of the cladding layer is not less than the diameter of the laser spot; the energy required for laser cladding is in the range of 1kW-5kW.

5. The method for preparing a laser-clad anti-stick steel coating on the surface of a vertical roller as described in claim 1, characterized in that, Based on thermo-coupling simulation calculations, the spiral linear coating exhibits optimal wear resistance and anti-sticking properties when the heat dissipation channel height is 20-30% of the maximum coating thickness, through the overlap rate. The scanning speed of the robotic arm can be calculated. The formula is as follows: ,in The diameter of the laser spot. The laser spot radius; Based on the requirements for the anti-stick steel coating on the vertical roller, the scanning speed of the robotic arm The range is 0.01m / s-0.2m / s.

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