A nano coating for cold rolling tension roller with wear resistance and roughness reduction

Abstract

The invention discloses a nano coating for a cold rolling tension roller with wear resistance and roughness reduction resistance, characterized in that: the tension roller surface is coated with a nano protective layer, the nano protective layer is a metal ceramic composite coating, the metal ceramic composite coating includes a nano bottom layer, a nano transition layer and a nano ceramic surface layer, and the nano bottom layer, the nano transition layer and the nano ceramic surface layer are sprayed in sequence from the inside to the outside. The cold rolling tension roller with a nano coating for wear resistance and roughness reduction resistance provided by the invention has a nano coating composite material with wear resistance and roughness reduction resistance, the composite material has good physical and chemical properties, can improve the bonding ability of the coating and the substrate, and at the same time improves the wear resistance and roughness reduction resistance of the tension roller surface, has mechanical load and high temperature resistance, and the service life is increased from the original 7 months to more than 2 years, which is much longer than the service life of the cold rolling tension roller in the prior art, effectively improves the unit operation rate and product quality, reduces the maintenance cost, and provides reliable guarantee for customers to reduce costs and increase efficiency.

Description

Technical Field

[0001] The invention relates to the field of tensioning roller equipment, in particular to a nano coating of a cold-rolled tensioning roller with wear resistance and roughness reduction resistance. Background Art

[0002] The current tension rollers are in contact with the strip during the production process, causing the roller surface to wear and the roughness to drop, which seriously affects the quality of the strip and causes slippage, causing the production unit to stop production and change rollers, which seriously affects the service life of the tension rollers. The current solution is to use micron materials to spray micron coatings to increase the service life of the rollers. The service life of the existing technology is 7 months. It cannot solve the problems of roller surface wear, cracking, roughness drop causing strip slippage, and the micron coating is easy to peel off. Summary of the invention

[0003] The object of the present invention is to provide a nano coating for a cold rolling tension roller with wear resistance and roughness reduction resistance, so as to solve one or more of the above-mentioned problems in the prior art.

[0004] According to the nano coating of a cold-rolled tensioning roller with wear resistance and roughness reduction of the present invention, the surface of the tensioning roller is coated with a nano protective layer, and the nano protective layer is a metal-ceramic composite coating. The metal-ceramic composite coating includes a nano bottom layer, a nano transition layer and a nano ceramic surface layer, and the nano bottom layer, nano transition layer and nano ceramic surface layer are sprayed in sequence from the inside to the outside.

[0005] The present invention provides a nano coating for a cold-rolled tensioning roller with resistance to wear and roughness reduction, which has a wear-resistant and crack-resistant nano-ceramic composite coating. The nano coating has good physical and chemical properties, can improve the bonding ability of the coating and the substrate, and at the same time improves the wear resistance and roughness reduction resistance of the tensioning roller surface, has both mechanical load and high temperature resistance, and the service life is increased from the original 7 months to more than 2 years, which is much longer than the service life of the cold-rolled tensioning roller in the prior art, effectively improves the unit operation rate and product quality, reduces maintenance costs, and provides reliable guarantee for customers to reduce costs and increase efficiency.

[0006] In some embodiments, the material grade of the nano bottom layer of the metal-ceramic composite coating is INF-8225-1, the material grade of the nano transition layer of the metal-ceramic composite coating is INF-8225-2, and the material grade of the nano ceramic surface layer of the metal-ceramic composite coating is INF-8225-3.

[0007] In some embodiments, the metal-ceramic composite coating has a thickness of 150-200 μm.

[0008] In some embodiments, the thickness of the nano-base layer is 30-50 μm, the thickness of the nano-transition layer is 40-60 μm, and the thickness of the nano-ceramic surface layer is 80-90 μm.

[0009] In some embodiments, a supersonic nano thermal spraying device is used to spray the nano protective layer on the roller body (1), and the spraying speed is 500 to 2000 m / s.

[0010] In some embodiments, the tensioning roller comprises a roller body (1) and an axial base (2) arranged at both ends of the roller body (1); the surface of the roller body (1) is coated with a nano protective layer; the roller body (1) comprises an outer roller body (11), a hollow roller body middle part (12) and hollow roller body end parts (13) located at both ends of the roller body middle part (12); the roller body middle part (12) and the roller body end parts (13) are both arranged inside the outer roller body (11); and the diameter of the roller body end parts (13) is greater than the diameter of the roller body middle part (12).

[0011] In some embodiments, the diameter of the middle part (12) of the roller body is 300-1200 mm, the diameter of the end part (13) of the roller body is 10 mm larger than the diameter of the middle part (12) of the roller body, and the outer end surface of the end part (13) of the roller body is provided with a connecting cylinder (14), and the connecting cylinder (14) is provided with a mounting base (15) around it, and the mounting base (15) is provided with a plurality of mounting screw holes. By increasing the width of the two ends of the roller body, it is possible to ensure that the pressure roller can remain stable during high-speed operation and eliminate vibration, so as to achieve the purpose of making the critical point outside the process speed, and the operating speed of the pressure roller can be increased to 12,000-18,000 rpm.

[0012] In some embodiments, the outer roller body (11) is provided with a ring body (3) at intervals, and the diameter of the ring body (3) is larger than the diameter of the outer roller body (11). The two ends of the roller body are widened, which can solve the defect of the roller being unstable when running at high speed.

[0013] In some embodiments, the central axes of the outer roller body (11), the roller body middle part (12), the roller body end part (13) and the shaft base (2) are located on the same straight line. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a nano coating for a cold rolling tension roller with wear resistance and roughness reduction according to an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of a cold rolling tension roller with wear resistance and roughness reduction according to an embodiment of the present invention

[0016] Figure 3A schematic structural diagram of an outer roller body of a cold-rolled tension roller with wear resistance and roughness reduction resistance according to an embodiment of the present invention;

[0017] Figure 4 This is a schematic structural diagram of a shaft base of a cold-rolled tensioning roller with wear resistance and roughness reduction resistance according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown in the figure, a nano coating for a cold-rolled tensioning roller with wear resistance and roughness reduction, the surface of the tensioning roller is coated with a nano protective layer, the nano protective layer is a metal-ceramic composite coating, the metal-ceramic composite coating includes a nano bottom layer 100, a nano transition layer 200 and a nano ceramic surface layer 300, the nano bottom layer 100, the nano transition layer 200 and the nano ceramic surface layer 300 are sprayed in sequence from the inside to the outside

[0020] The nano protective layer is a metal-ceramic composite coating, which includes a nano bottom layer, a nano transition layer and a nano ceramic surface layer, which are sprayed in sequence from inside to outside.

[0021] The material grade of the nano-bottom layer 100 of the metal-ceramic composite coating is INF-8225-1, the material grade of the nano-transition layer 200 of the metal-ceramic composite coating is INF-8225-2, and the material grade of the nano-ceramic surface layer 300 of the metal-ceramic composite coating is INF-8225-3. The metal-ceramic composite coating of INF-8235-3 can make the wear resistance of the entire coating better.

[0022] The thickness of the nano protective layer is 150-200 μm, wherein the nano bottom layer is a nano NGr layer, the nano base layer is a nano NGrS2Mo layer, and the nano ceramic layer is a chromium oxide-based ceramic composite layer; the thickness of the nano bottom layer is 30-50 μm, the thickness of the nano transition layer is 40-60 μm, and the thickness of the nano ceramic surface layer is 80-90 μm. At this thickness of the nano protective layer, the entire tensioning roller has the effects of wear resistance, roughness reduction resistance, and crack resistance.

[0023] A supersonic nano thermal spraying device is used to spray a nano protective layer on the roller body (1), with a spraying speed of 1350-2000 m / s.

[0024] The microhardness of the prepared nano coating reaches HV900-1100, the roller surface roughness is Ra0.8, the bonding strength between the coating and the substrate is above 80Mpa, and the service life is more than 2 years.

[0025] The present invention provides a cold-rolled tensioning roller with a wear-resistant and roughness-reducing nano-coating, which has a wear-resistant, roughness-reducing and crack-resistant nano-coating composite material. The composite material has both good physical and chemical properties, and can improve the bonding ability between the coating and the substrate, while improving the wear resistance and roughness-reduction resistance of the tensioning roller surface, and has both mechanical load and high temperature resistance. The service life is increased from the original 7 months to more than 2 years, which is much longer than the service life of the cold-rolled tensioning roller in the prior art, effectively improving the unit operation rate and product quality, reducing maintenance costs, and providing reliable guarantee for customers to reduce costs and increase efficiency.

[0026] A method for preparing a wear-resistant and roughness-reducing nano-coating:

[0027] The steps include:

[0028] (1) Cleaning and degreasing: the roller body (1) is placed in a non-ionic surfactant solution with a mass concentration of 5% to 10% for cleaning, and then ventilated and dried;

[0029] (2) Sandblasting: Use first-grade brown corundum to roughen the roller surface;

[0030] (3) Preparation of nano-bottom layer: Using supersonic flame spraying equipment, the molten bottom layer nano-material is sprayed onto the roller surface of the burring roller at a rate of 500-2500 m / s, and the coating thickness is 30-50 μm;

[0031] (4) Preparation of nano transition layer: Using supersonic flame spraying equipment, the molten bottom nano material is sprayed onto the roller surface of the burring roller at a rate of 500-2500 m / s, and the coating thickness is 40-60 μm;

[0032] (5) Preparation of nano-surface layer: Using supersonic flame spraying equipment, the molten surface layer nano-material is sprayed onto the roller surface of the burring roller at a rate of 500-2500 m / s, and the coating thickness is 80-900 um.

[0033] The above steps,

[0034] like Figures 2 to 4 As shown in the figure, the tensioning roller includes a roller body 1 and an axis base 2 installed at both ends of the roller body 1, the roller body 1 includes an outer roller body 11, a hollow roller body middle part 12 and hollow roller body end parts 13 located at both ends of the roller body middle part 12, the roller body middle part 12 and the roller body end parts 13 are both arranged inside the outer roller body 11, and the diameter of the roller body end parts 13 is larger than the diameter of the roller body middle part 12.

[0035] In the above, by increasing the width at both ends of the roller body 1, it is possible to ensure that the roller can remain stable and eliminate vibration during high-speed operation, thereby achieving the purpose of making the critical point outside the process speed. The operating speed of the roller can be increased to 12,000 to 18,000 rpm.

[0036] The roller body has a diameter of 300-1200 mm, the diameter of the roller body end (13) is 10 mm larger than the diameter of the roller body middle (12), the roller body coating thickness is 150-200 μm, the outer end surface of the roller body end (13) is provided with a connecting cylinder (14), the connecting cylinder (14) is provided with a mounting base (15), and the mounting base (15) is provided with a plurality of mounting screw holes. In this embodiment, both ends of the roller body 1 are widened, and the diameter of the roller body end (13) is 10 mm larger than the diameter of the roller body middle (12), so that the defect of the roller being unstable when running at high speed can be solved.

[0037] Screw holes are also provided at positions corresponding to the mounting screw holes of the shaft base 2, and the shaft base 2 and the roller end 13 are fixedly connected by screws. The screws are installed and fixed along the axis direction, with good fixing effect, stable and convenient installation.

[0038] The outer roller body 11 is provided with a ring body 3 at intervals, and the diameter of the ring body 3 is slightly larger than the diameter of the outer roller body 11. The function of the ring body 3 is to make the silk thread easy to be formed on the pressure roller, so as to be easy to become a silk cake.

[0039] The central axis of the outer roller body 11, the roller body middle part 12, the roller body end 13 and the shaft base 2 are located on the same straight line. The purpose of this design is to ensure that the speed of the pressure roller is stable and steady under the same axis.

[0040] The nano coating of the cold-rolled tension roller with wear resistance and roughness reduction provided by the present invention can eliminate the critical point and vibration of the roller during high-speed rotation by adjusting the width of the inner cavity at both ends of the sleeve, thereby achieving the purpose of stable rotation.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several similar modifications and improvements without departing from the creative concept of the present invention, and these are also considered to be within the scope of invention protection.

Claims

1. A cold rolling tension roller with wear resistance and roughness resistance, characterized in that: The surface of the tensioning roller is coated with a nano protective layer, the nano protective layer is a metal ceramic composite coating, the metal ceramic composite coating comprises a nano bottom layer, a nano transition layer and a nano ceramic surface layer, the nano bottom layer, the nano transition layer and the nano ceramic surface layer are sprayed in sequence from the inside to the outside; the tensioning roller comprises a roller body (1) and an axis base (2) arranged at both ends of the roller body (1), the surface of the roller body (1) is coated with a nano protective layer, the roller body (1) comprises an outer roller body (11), a hollow roller body middle part (12) and hollow roller body ends (13) located at both ends of the roller body middle part (12), the roller body middle part (12) and the roller body ends (13) are both arranged inside the outer roller body (11), and the diameter of the roller body ends (13) is larger than that of the roller body middle part (12). 12), the thickness of the metal ceramic composite coating is 150-200 μm, the thickness of the nano bottom layer is 30-50 μm, the thickness of the nano transition layer is 40-60 μm, the thickness of the nano ceramic surface layer is 80-90 μm, the diameter of the middle part (12) of the roller body is 300-1200 mm, the diameter of the roller body end (13) is 10 mm larger than the diameter of the middle part (12) of the roller body, the outer end surface of the roller body end (13) is provided with a connecting cylinder (14), the connecting cylinder (14) is provided with a mounting base (15), the mounting base (15) is provided with a plurality of mounting screw holes, and the outer roller body (11) is provided with a ring body (3) at intervals, and the diameter of the ring body (3) is larger than the diameter of the outer roller body (11).

2. A cold rolling tension roller with wear resistance and roughness resistance according to claim 1, characterized in that: A supersonic nano thermal spraying device is used to spray a nano protective layer on the roller body (1), with a spraying speed of 500 to 2000 m / s.

3. A cold rolling tension roller with wear resistance and roughness resistance according to claim 2, characterized in that: The central axes of the outer roller body (11), the roller body middle part (12), the roller body end part (13) and the shaft base (2) are located on the same straight line.

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