CN118064893A - WC65 composite coating on surface of hot rolling descaling roller and preparation method thereof - Google Patents

Abstract

The invention provides a WC65 composite coating on the surface of a hot rolling descaling roller and a preparation method thereof. The coating comprises a Ni45 transition layer which is deposited on the surface of the hot rolling descaling roller substrate and a working layer which is sprayed on the surface of the Ni45 transition layer; the preparation method comprises the following steps: and overlaying Ni45 powder on the surface of the hot rolling descaling roller matrix to form a Ni45 transition layer, mixing WC65 powder and FeCoNiCrMn powder, and spraying on the surface of the Ni45 transition layer. The hot rolling descaling roller provided by the invention has the advantages of stable friction coefficient, good wear resistance and high hardness, and the surface of the coating has almost no peeling defect and no furrow defect, and the surface of the coating has few oxidized particles attached.

Description

WC65 composite coating on surface of hot rolling descaling roller and preparation method thereof

Technical Field

The invention belongs to the technical field of protection of hot-rolling descaling rollers, and particularly relates to a WC65 composite coating on the surface of a hot-rolling descaling roller and a preparation method thereof.

Background

In the rolling process of steel, a descaling roller is an important mechanical device, and is a key component of a descaling box. In the descaling process, the descaling roller is directly contacted with a slab which is rapidly driven at high temperature, and after a period of use, the descaling roller is often scrapped due to faults such as surface layer cracking, pits, cracks and the like caused by friction wear, thermal fatigue and high-pressure water erosion. Because the actual working environment of the descaling roller is quite harsh, the working temperature can reach 600 ℃ at most, and the descaling roller is directly exposed on the surface of high-temperature metal, and the high-temperature environment has higher requirements on the stability and heat resistance of the descaling roller. In addition to the high temperatures, the descaling rolls are also subjected to high pressure water impact and corrosion on the production line, and after a period of operation in such harsh environments, the descaling rolls may suffer from different degrees and forms of damage, typically manifested as surface pits, surface cracks and localized spalling. The descaling roller is subjected to strong friction and pressure for removing scales and dirt on the metal surface, which causes surface abrasion and fatigue damage, and affects performance and service life. In this regard, the use performance and service life of the descaling roller are ensured mainly by arranging a coating on the surface of the descaling roller.

In the prior art, a document CN110004372B discloses a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller, which comprises a matrix and a composite coating, wherein the matrix is carbon structural steel, and the raw material of the composite coating with the mass percentage of C：0.11-0.15％、Al：0.035-0.08％、Mn：0.32-0.63％、S：0.008-0.016％、P：0.012-0.027％、Si：0.06-0.15％、N：0.001-0.003％、Als：0.011-0.052％、Fe ：98.69-99.18％, elements in the carbon structural steel is alloy powder. According to the scheme, the porosity of the coating is reduced to be below 0.3%, so that the tissue compactness is improved, the crack tendency is reduced, and the service life of the metallurgical roller is prolonged. However, this solution does not give a solution to the phenomenon of furrowing that occurs during use of the descaling roller in a high temperature environment.

In addition, oxidized particles are easy to appear in the use process of the descaling roller under a high-temperature environment, and the problem to be solved is how to effectively remove the oxidized particles on the descaling roller.

Disclosure of Invention

At least to solve the problems mentioned in the background art, the invention provides a WC65 composite coating on the surface of a hot rolling descaling roller and a preparation method thereof.

The invention adopts the following technical scheme.

The WC65 composite coating on the surface of the hot-rolled descaling roller comprises a Ni45 transition layer deposited on the surface of a hot-rolled descaling roller substrate and a working layer sprayed on the surface of the Ni45 transition layer, wherein the mass ratio of WC65 powder to FeCoNiCrMn powder in the raw materials of the working layer is 6-8:2-4;

Wherein, according to the mass percentage,

The Ni45 transition layer comprises the following components: 0.2-0.6% of C, 2-3% of B, 3-4.5% of Si, 7-12% of Cr, 15% of Fe, 0.1% of Mn and the balance of nickel and unavoidable impurities;

The WC65 powder comprises the following components: 95-96% of W, 3.8-4.1% of C, 0.1% of Ti, 0.02% of Si, 0.5% of Fe, 0.05% of Vi and the balance of unavoidable impurities;

FeCoNiCrMn the powder comprises the following components: 20% of Fe, 20% of Co, 20% of Ni, 20% of Cr, 20% of Mn and the balance of unavoidable impurities.

Preferably, the mass ratio of WC65 powder to FeCoNiCrMn powder in the raw material of the working layer is 7:3.

Preferably, the particle size of the raw material powder, WC65 powder and FeCoNiCrMn powder of the Ni45 transition layer is 45-150 μm.

As a preferable scheme, the thickness of the Ni45 transition layer is 4+/-0.5 mm, and the thickness of the working layer is 3+/-0.5 mm.

As a preferable scheme, the components of the Ni45 transition layer are as follows: 0.3+/-0.05% of C, 2.5+/-0.05% of B, 3.5+/-0.05% of Si, 8+/-0.1% of Cr, 9+/-1% of Fe, 0.1% of Mn and the balance of nickel and unavoidable impurities.

The preparation method of the WC65 composite coating on the surface of the hot rolling descaling roller comprises the following steps:

Step 1, preprocessing, namely cleaning the surface of a substrate of a No. 45 steel alloy hot rolling descaling roller, and then carrying out ultrasonic cleaning;

Step 2, preparing Ni45 powder;

step3, overlaying Ni45 powder on the surface of the hot rolling descaling roller matrix to form a Ni45 transition layer;

Step 4, after the step 3 is finished, placing the workpiece in air for cooling for three days;

step 5, preparing working layer powder, and mixing WC65 powder and FeCoNiCrMn powder according to a mass ratio of 7:3 to obtain mixed powder;

Step 6, spraying a working layer on the surface of the Ni45 transition layer of the obtained workpiece, and taking out the workpiece after finishing;

Step 7, carrying out post-treatment on the obtained workpiece, wherein the post-treatment process comprises the following steps: and (3) carrying out sliding friction treatment on the surface of the workpiece for 30 minutes under the working conditions of 400 ℃, 15N, 17Hz or 600 ℃, 15N, 13Hz to obtain the descaling roller.

Further, the step 3 specifically includes:

Firstly, programming an industrial robot to determine a working operation route, adjusting the distance between a plasma spray gun of an ion spraying system and a workpiece to be 10-15 mm, and setting the running speed of the plasma spray gun to be 220 mm/min;

then, putting Ni45 powder into a powder feeder, setting the powder feeding speed to be 16.5 g/min and setting the working current to be 140A;

Then, starting the industrial robot to spray the preheated workpiece, and cleaning residual powder in the powder feeder when the industrial robot finishes the first operation and returns to the initial position; then, adding NI45 powder again, placing the powder into the powder feeder, starting the industrial robot again, and cleaning the powder feeder again after the secondary operation is finished.

Further, step6 specifically includes:

Firstly, programming an industrial robot to determine a working operation route, adjusting the distance between a plasma spray gun of an ion spraying system and a workpiece to be 10-15 mm, and setting the running speed of the plasma spray gun to be 200 mm/min;

then, putting the mixed powder into a powder feeder, setting the powder feeding speed to be 15.5 g/min and setting the working current to be 140A;

Then, starting the industrial robot to spray the preheated workpiece, and cleaning residual powder in the powder feeder when the industrial robot finishes the first operation and returns to the initial position; then, adding mixed powder again, placing the mixed powder in a powder feeder, starting the industrial robot again, and cleaning the powder feeder again after the secondary operation is finished.

Preferably, the workpiece is preheated to 300 ℃ in the step 3, and the workpiece is preheated to 400 ℃ in the step 6.

The beneficial effects are that: the hot rolling descaling roller provided by the invention has the advantages of stable friction coefficient, good wear resistance and high hardness, and the surface of the coating has almost no peeling defect and no furrow defect, and the oxidized particles attached to the surface of the coating are few, so that the technical problem that the descaling roller is easy to generate oxidized particles in the use process under a high-temperature environment is solved ingeniously.

Drawings

FIG. 1 is a graph of the friction coefficient (200 ℃ C.) of a sample of a descaling roller in the example;

FIG. 2 is a graph of the friction coefficient (400 ℃) of a sample scale-removing roller in the example;

FIG. 3 is a graph of the friction coefficient (600 ℃ C.) of a sample of the descaling roller of the example;

Fig. 4 to 17 show microstructures of the surface of the sample of the descaling roller according to the embodiment, wherein the part (b) and the part (c) correspond to different magnification factors respectively in each figure, and the lower left corner mark in the figure is shown in detail.

Detailed Description

The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples

A preparation method of a WC65 composite coating on the surface of a hot rolling descaling roller comprises the following steps:

Step 1, preprocessing, namely polishing a No. 45 steel superalloy roller substrate, cleaning cutting marks generated by surface linear cutting and surface oxide films, and then ultrasonically cleaning to remove surface greasy dirt;

Step 2, preparing Ni45 powder/powder, wherein the particle size of the Ni45 powder produced by the surface engineering Co., ltd. Of the great wall of the tribute is 45-150 mu m;

Step 3, overlaying Ni45 powder on the surface of the hot rolling descaling roller matrix to form a Ni45 transition layer, specifically:

The spraying equipment adopts a DML-V03CD plasma spraying system; starting a control main power supply, starting a power supply of an electric welding machine, starting a cooling circulating water and an air supply device, selecting a continuous welding mode, setting a powder supply amount of 40g, adjusting a welding current of 140A, and setting the rising time to be the time required by a base value to the welding current to be 0.3s, wherein the powder supply air flow rate of 4L/min, the ion air flow rate of 2L/min and the protection air flow rate of 10L/min; during overlaying, firstly preheating a roller matrix to 300 ℃, then programming an industrial robot to determine a working operation route, adjusting the distance between a plasma spray gun and a workpiece to be 12mm, and setting the running speed of the plasma spray gun to be 220 mm/min; then loading Ni45 powder/powder into a powder feeder; then, unscrewing a nut of the powder feeder, placing a funnel, adding Ni45 powder/powder, taking care that the adding amount of the powder cannot exceed the top of an air pipe in the powder barrel, and taking off the funnel after the powder is filled, placing the nut and tightening to prevent air leakage; then, setting the powder feeding speed to be 16.5 g/min; then, fine-adjusting working parameters and starting the industrial robot to start spraying, and cleaning residual powder in the powder feeder when the industrial robot finishes first running and returns to an initial position; then, adding NI45 powder again, placing the powder into a powder feeder, starting the industrial robot again, cleaning the powder feeder again after the secondary operation is finished, and taking out the workpiece;

step 4, after the step 3 is finished, the workpiece is placed in the air in the room temperature environment to be cooled for three days;

step 5, preparing working layer powder, and mixing WC65 powder and FeCoNiCrMn powder according to a mass ratio of 7:3 to obtain mixed powder;

Step 6, spraying a working layer on the surface of the Ni45 transition layer of the obtained workpiece, and taking out the workpiece after finishing;

specifically: preheating the air-cooled workpiece to 400 ℃, programming the industrial robot again to determine a working operation route, adjusting the distance between the plasma spray gun and the workpiece to be 12 mm, and setting the running speed of the plasma spray gun to be 200 mm/min; placing the mixed powder in a powder feeder, setting the powder feeding speed to be 15.5 g/min and setting the current to be 140A; then, starting the industrial robot to start spraying, and cleaning residual powder in the powder feeder when the industrial robot finishes the first running and returns to the initial position; then, adding mixed powder again, placing the mixed powder in a powder feeder, starting an industrial robot again, cleaning the powder feeder again after the secondary operation is finished, taking out a workpiece, wherein the thickness of a Ni45 transition layer of the obtained workpiece is 4mm, and the thickness of a working layer is 3 mm;

Step 7, carrying out post-treatment on the obtained workpiece, wherein the post-treatment process comprises the following steps: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 400 ℃ and 15N and 17Hz, wherein the sliding direction in the sliding friction process is along the axial sliding direction of the workpiece, so as to obtain the descaling roller.

Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: hardness was 701HV, friction coefficient (about 0.4) was shown in the corresponding curve (400C-15N-17 Hz) in FIG. 2, microstructure chart was shown in FIG. 11, showing no flaking defect, no furrowing defect, and very few oxide particles attached.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 600 ℃, 15N and 13Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: hardness was 699HV, friction coefficient (about 0.1) was shown in the corresponding curve (600C-15N-13 Hz) in FIG. 3, and microstructure chart was shown in FIG. 15, showing no flaking defects and few adherent oxidized particles.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 200 ℃, 10N and 15Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness is 640HV, the friction coefficient (about 0.1-0.3) is shown in the corresponding curve (200C-10N-15 Hz) in FIG. 1, the microstructure is shown in FIG. 4, and the attached oxidized particles are very much and are in a fluffy cluster shape and a honeycomb shape.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 200 ℃, 15N and 13Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness is 640HV, the friction coefficient (about 0.1-0.15) is shown in the corresponding curve (200C-15N-13 Hz) in FIG. 1, the microstructure is shown in FIG. 5, and the defect of furrows is shown, and the adhered oxidized particles are very large and are in a fluffy cluster shape.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 200 ℃, 15N and 15Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness is 635HV, the friction coefficient (about 0.08-0.15) is shown in the corresponding curve (200C-15N-15 Hz) in FIG. 1, the microstructure is shown in FIG. 6, showing that there are furrowing defects, multiple spalling defects, and oxidized particles are visible in the spalling defects.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 200 ℃, 15N and 17Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness was 642HV, the coefficient of friction (about 0.4 to 0.6) was shown in FIG. 1 for the corresponding curve (200C-15N-17 Hz), and the microstructure was shown in FIG. 7, showing a large number of agglomerated oxidized particles in the form of lumps.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 400 ℃, 10N and 15Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness was 700HV, the coefficient of friction (about 0.1 to 0.15) was shown in FIG. 2 as corresponding curves (400C-10N-15 Hz), and the microstructure chart was shown in FIG. 8, showing multiple furrow defects and flaking defects in the form of strips.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 400 ℃, 15N and 13Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: hardness is 698HV, friction coefficient (about 0.1-0.15) is shown in the corresponding curve (400C-15N-13 Hz) in FIG. 2, microstructure is shown in FIG. 9, and very many oxidized particles are shown.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 400 ℃, 15N and 15Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: hardness is 699HV, friction coefficient (about 0.1-0.15) is shown in the corresponding curve (400C-15N-15 Hz) in FIG. 2, microstructure is shown in FIG. 10, showing in-furrow defect, peeling defect and light white plaque (defect to be peeled off), and oxidized particles are visible in the peeling defect.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 600 ℃, 10N and 13Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness was 695HV, and the microstructure chart is shown in FIG. 12, showing that there were furrowing defects, flaking defects, and many oxidized particles.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 600 ℃, 10N and 15Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness is 696HV, the friction coefficient (about 0.05-0.15) is shown in the corresponding curve (600C-10N-15 Hz) in FIG. 3, the microstructure is shown in FIG. 13, and the defect of furrows is shown, so that oxidized particles are fewer.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 600 ℃,10N and 17Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: hardness is 694HV, friction coefficient (about 0.05-0.15) is shown in the corresponding curve (600C-10N-17 Hz) in FIG. 3, microstructure is shown in FIG. 14, showing furrowing defects and large scale oxidized particles.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 600 ℃, 15N and 15Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: the hardness is 696HV, the friction coefficient (about 0.05-0.2) is shown in the corresponding curve (600C-15N-15 Hz) in FIG. 3, the microstructure is shown in FIG. 16, the defect of furrowing and multiple peeling defects are shown, a plurality of oxidized particles are attached, and partial oxidized particles are found in the peeling defects.

Examples

A method for preparing WC65 composite coating on the surface of a hot rolling descaling roller, which is different from example 1 in the step 7 with reference to example 1, and the obtained workpiece is subjected to post-treatment, wherein the post-treatment process is as follows: and (3) carrying out sliding friction treatment on the whole surface of the workpiece for 30 minutes under the working conditions of 600 ℃, 15N and 17Hz to obtain the descaling roller. Performance test and microscopic detection were performed on the descaling roller sample prepared in this example, and the results showed that: hardness is 692HV, friction coefficient (about 0.05-0.15) is shown in corresponding curve (600C-15N-17 Hz) in figure 3, microstructure is shown in figure 16, which shows that the defect of plow groove and large-area peeling defect are included, a plurality of oxidized particles are attached, and partial oxidized particles are found in the peeling defect.

The hot rolling descaling roller provided by the embodiment 1-2 has the advantages of stable friction coefficient, good wear resistance and high hardness, and the coating surface has almost no peeling defect and no furrowing defect, and few oxidized particles are adhered to the coating surface, so that the technical problem that the descaling roller is easy to generate oxidized particles in the use process under the high-temperature environment is skillfully solved.

Claims (9)

1. The WC65 composite coating on the surface of the hot-rolled descaling roller is characterized by comprising a Ni45 transition layer deposited on the surface of a hot-rolled descaling roller substrate and a working layer sprayed on the surface of the Ni45 transition layer, wherein the mass ratio of WC65 powder to FeCoNiCrMn powder in raw materials of the working layer is 6-8:2-4;

Wherein, according to the mass percentage,

The Ni45 transition layer comprises the following components: 0.2-0.6% of C, 2-3% of B, 3-4.5% of Si, 7-12% of Cr, 15% of Fe, 0.1% of Mn and the balance of nickel and unavoidable impurities;

The WC65 powder comprises the following components: 95-96% of W, 3.8-4.1% of C, 0.1% of Ti, 0.02% of Si, 0.5% of Fe, 0.05% of Vi and the balance of unavoidable impurities;

FeCoNiCrMn the powder comprises the following components: 20% of Fe, 20% of Co, 20% of Ni, 20% of Cr, 20% of Mn and the balance of unavoidable impurities.

2. The hot rolled descaling roll surface WC65 composite coating according to claim 1, wherein: the mass ratio of WC65 powder to FeCoNiCrMn powder in the raw material of the working layer is 7:3.

3. The hot rolled descaling roll surface WC65 composite coating according to claim 2, wherein: the particle sizes of the raw material powder, WC65 powder and FeCoNiCrMn powder of the Ni45 transition layer are 45-150 mu m.

4. A hot rolled descaling roll surface WC65 composite coating according to claim 3 characterized in that: the thickness of the Ni45 transition layer is 4+/-0.5 mm, and the thickness of the working layer is 3+/-0.5 mm.

5. The hot rolled descaling roll surface WC65 composite coating according to any one of claims 1-4 wherein the Ni45 transition layer comprises the following composition: 0.3+/-0.05% of C, 2.5+/-0.05% of B, 3.5+/-0.05% of Si, 8+/-0.1% of Cr, 9+/-1% of Fe, 0.1% of Mn and the balance of nickel and unavoidable impurities.

6. A method of producing a WC65 composite coating on a surface of a hot-rolled descaling roll according to any one of claims 1 to 5 comprising the steps of:

Step 1, preprocessing, namely cleaning the surface of a substrate of a No. 45 steel alloy hot rolling descaling roller, and then carrying out ultrasonic cleaning;

Step 2, preparing Ni45 powder;

step3, overlaying Ni45 powder on the surface of the hot rolling descaling roller matrix to form a Ni45 transition layer;

Step 4, after the step 3 is finished, placing the workpiece in air for cooling for three days;

step 5, preparing working layer powder, and mixing WC65 powder and FeCoNiCrMn powder according to a mass ratio of 7:3 to obtain mixed powder;

Step 6, spraying a working layer on the surface of the Ni45 transition layer of the obtained workpiece, and taking out the workpiece after finishing;

Step 7, carrying out post-treatment on the obtained workpiece, wherein the post-treatment process comprises the following steps: and (3) carrying out sliding friction treatment on the surface of the workpiece for 30 minutes under the working conditions of 400 ℃, 15N, 17Hz or 600 ℃, 15N, 13Hz to obtain the descaling roller.

7. The method according to claim 6, wherein step 3 comprises:

Firstly, programming an industrial robot to determine a working operation route, adjusting the distance between a plasma spray gun of an ion spraying system and a workpiece to be 10-15 mm, and setting the running speed of the plasma spray gun to be 220 mm/min;

then, putting Ni45 powder into a powder feeder, setting the powder feeding speed to be 16.5 g/min and setting the working current to be 140A;

Then, starting the industrial robot to spray the preheated workpiece, and cleaning residual powder in the powder feeder when the industrial robot finishes the first operation and returns to the initial position; then, adding NI45 powder again, placing the powder into the powder feeder, starting the industrial robot again, and cleaning the powder feeder again after the secondary operation is finished.

8. The method according to claim 7, wherein step 6 specifically comprises:

Firstly, programming an industrial robot to determine a working operation route, adjusting the distance between a plasma spray gun of an ion spraying system and a workpiece to be 10-15 mm, and setting the running speed of the plasma spray gun to be 200 mm/min;

then, putting the mixed powder into a powder feeder, setting the powder feeding speed to be 15.5 g/min and setting the working current to be 140A;

Then, starting the industrial robot to spray the preheated workpiece, and cleaning residual powder in the powder feeder when the industrial robot finishes the first operation and returns to the initial position; then, adding mixed powder again, placing the mixed powder in a powder feeder, starting the industrial robot again, and cleaning the powder feeder again after the secondary operation is finished.

9. The method of manufacturing according to claim 8, wherein: the workpiece is preheated to 300 ℃ in the step 3, and the workpiece is preheated to 400 ℃ in the step 6.