CN110158011A - Rewind roll and preparation method thereof with the compound roughening coating of surface anticorrosive wear-resistant - Google Patents

Abstract

A rewinding roll with a surface anti-corrosion and wear-resistant composite roughening coating and a preparation method thereof. The invention relates to an anti-corrosion and wear-resistant composite roughening coating on the surface of a rewinding roller and a preparation method thereof. Then use plasma spraying technology to prepare a layer of wear-resistant roughening coating on the surface of the anti-corrosion adhesive layer, through the dense anti-corrosion adhesive layer to ensure the excellent corrosion resistance of the rewinding roller in the humid acid and alkali working environment, the wear-resistant roughening layer Realize the basic paper transport function of the rewinding roller. The method of preparing the composite coating by using different spraying methods in the present invention solves the problems of the roughened coating prepared by the plasma spraying technology, which is easy to corrode and easy to fall off in a humid acid-base environment due to its low density. It can effectively improve the service life of the rewinding roller, so that the rewinding roller has excellent corrosion resistance and wear resistance at the same time.

Description

Rewinding roll with surface anti-corrosion and wear-resistant composite roughening coating and preparation method thereof

technical field

The invention belongs to the field of manufacturing key components of key equipment for household paper, and in particular relates to an anti-corrosion and wear-resistant composite roughening coating on the surface of a rewinding roller and a preparation method thereof.

Background technique

The parts of the rewinder work under the production conditions of high temperature and high humidity all the year round. Some of the processed material pulp contains acid and alkali components, which are strongly corrosive to the machinery and equipment. The local corrosion and damage of the rewinding roller can directly affect the production efficiency and quality of household paper. In severe cases, the equipment may be scrapped before reaching the expected service life and must be updated in advance. These will greatly increase the cost of the paper industry and seriously affect the economic benefits of the enterprise.

Therefore, while considering the controllable roughness and wear resistance of the surface treatment coating, it is necessary to solve the relevant corrosion problems, strengthen the anti-corrosion performance of the surface of the rewinding roller and other parts, and prolong the service life of the equipment.

At present, the more advanced surface roughening technology of rewinding roll is to use plasma spraying technology to prepare a layer of roughened coating on the surface of the rewinding roll, but the roughened coating prepared by plasma spraying technology is not dense, and it is very easy to corrode. Under the environment, its shortcomings are becoming more and more obvious, the roughened coating is easy to fall off, and the service life is short. The method of sealing holes with a sealing agent is not very effective for corrosion in long-term use, and does not fundamentally solve the corrosion resistance problem of the rewinding roll.

To sum up, although the methods currently on the market initially meet the technical requirements of the roughness of the rewinding roller, there are serious corrosion problems in the humid, acid-alkali environment, which in turn causes the short service life of the rewinding machine, Problems such as unstable quality of tissue paper products and low production efficiency have increased the cost of related enterprises. It can be seen that it is very important to further improve the anti-corrosion ability of the rewinding roll and enhance its applicability to corrosion conditions.

SUMMARY OF THE INVENTION

In order to overcome the problem of low corrosion resistance on the surface of the existing rewinding roll, the purpose of the present invention is to provide a composite roughening coating for corrosion resistance and wear resistance on the surface of the rewinding roll and a preparation method thereof. The corrosion-resistant coating prepared by supersonic flame spraying technology has high bonding strength between the coating and the substrate, low porosity, excellent corrosion resistance and high temperature resistance of the coating, and also has the advantages of simple process, low production cost and controllability. Good advantage. The composite roughening coating has high corrosion resistance, can effectively improve the service life of the rewinding roll, and enables the rewinding roll to have superior corrosion resistance and wear resistance.

The technical scheme of the present invention is realized as follows:

The invention provides a preparation method of a rewinding roll with a surface anti-corrosion and wear-resistant composite roughening coating, comprising the following steps:

(1) Use metal cleaning agent to brush the surface of the rewinding roll blank to remove grease and stains on the surface of the rewinding roll; the surface of the rewinding roll after cleaning should be free of water, oil, dust, paint and other debris;

(2) Protect the non-sandblasted part of the rewinding roller with copper skin, and blast the surface to roughen it;

(3) Preparation of corrosion-resistant layer on the surface of the rewinding roll blank: prepare a layer of corrosion-resistant coating on the surface of the rewinding roll blank;

(4) Preparation of the wear-resistant roughening coating on the surface of the rewinding roll: a layer of wear-resistant roughening coating is prepared on the surface of the anti-corrosion coating of the rewinding roll;

(5) After the preparation of the wear-resistant roughening coating is completed, check the surface of the rewinding roller. The coating should be complete, the surface should be uniform and continuous, the color of the coating should be basically the same, and there should be no defects such as cracks and peelings.

Preferably, the sand used for sandblasting in step (2) is brown corundum;

Preferably, the sandblasting parameters in step (2) are: sandblasting pressure: 0.20-1.00MPa, sandblasting angle>60°, sandblasting distance 200-500mm;

Preferably, the corrosion-resistant coating described in step (3) is sprayed using supersonic flame spraying technology;

Preferably, the parameters of the supersonic flame spraying are: spraying distance: 100-600mm, powder feeding rate: 0.5-5g/min; fuel flow rate is 15-30L/h, pressure is 11-13MPa; oxygen flow rate is 40- 60L/h, pressure is 14-16MPa; Argon flow rate is 5-9L/h, pressure is 0.7-0.9MPa;

Preferably, the material used for the corrosion-resistant coating in step (3) is selected from one or Various; the powder particle size of the material is 20-50 μm; the thickness of the corrosion-resistant coating is 5-150 μm, and the corrosion-resistant coating needs to be evenly covered;

Preferably, the wear-resistant roughening coating in step (4) is sprayed by atmospheric plasma spraying technology;

Preferably, the parameters of the atmospheric plasma spraying are: argon flow rate: 60L/min, hydrogen flow rate: 8L/min, current: 600A, spraying distance: 100mm;

Preferably, the material used for the wear-resistant roughening coating in step (4) is Ni60(X)WC, where X is the mass ratio of the WC component in the Ni60(X)WC material, and its value is 0<X <60, the particle size of Ni60(X)WC powder is 50-325 mesh; the Ni60 component mainly has the effect of roughening the surface of the coating, and the WC component can increase the wear resistance of the roughening layer; the thickness of the wear-resistant roughening coating is 10 -1000 microns, with a surface roughness of 5-30 μm;

The present invention further provides a rewinding roll with a surface anti-corrosion and wear-resistant composite roughening coating prepared according to the above method.

Compared with the prior art, the present invention has the following advantages:

(1) The corrosion-resistant and wear-resistant roughening coating of the present invention is suitable for rewinding rolls of any material and any size, and has good versatility;

(2) The present invention adopts the combination of supersonic flame spraying and plasma spraying to prepare a corrosion-resistant and wear-resistant composite roughening coating, which has higher bonding strength, lower porosity, high coating uniformity and compactness. Good, the quality of use is guaranteed to ensure that the coating will not peel, crack, or peel off during hot working conditions and high-speed paper transportation, and the anti-wear and anti-corrosion effects will be effective for a long time.

Description of drawings

Fig. 1 is the actual surface microscopic morphology of the rewinding roll prepared by the present invention;

Fig. 2 is the 3D scanning topography of the rewinding roll prepared by the present invention;

Fig. 3 is the metallographic structure diagram of the cross-section of the roughened layer of the experimental group and the control group of the present invention;

Fig. 4 is the coating surface morphology of the experimental group and the control group after 24 hours of salt spray test of the present invention

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

A preparation method of a rewinding roll with a surface anti-corrosion and wear-resistant composite roughening coating, comprising the following steps:

(1) Use metal cleaning agent to brush the surface of the carbon steel rewinding roll blank to remove the grease and stains on the surface of the rewinding roll;

(2) Protect the non-sandblasted part of the rewinding roller with copper skin, and blast its surface to roughen it. The sandblasting parameters are the blasting pressure: 0.50MPa, the blasting angle is 80°, the blasting sand is 24# brown corundum, and the blasting distance is 200mm;

(3) A layer of WC-10Co4Cr corrosion-resistant coating was prepared on the surface of the rewinding roll blank by supersonic flame spraying. The specific process parameters are as follows: the distance is 300mm, the powder feeding rate is 1.5g/min; the fuel flow rate is 25L/h, and the pressure is 12MPa; the oxygen flow rate is 50L/h, and the pressure is 15MPa; the argon gas flow rate is 7L/h, and the pressure is 0.8MPa; The thickness of the corrosion-resistant adhesive layer is 50μm;

(4) Prepare a layer of wear-resistant roughening coating on the surface of the anti-corrosion adhesive layer of the rewinding roller by atmospheric plasma spraying. The specific parameters are, argon flow: 60L/min, hydrogen flow: 8L/min, current: 600A, spraying Distance: 100mm; the powder used for the roughening layer is Ni60-35WC, the powder particle size is 60-100 mesh; the coating thickness is 100 microns, and the surface roughness is 18±5 μm;

(5) After the preparation of the wear-resistant roughening coating is completed, check the surface of the rewinding roller. The coating should be complete, the surface should be uniform and continuous, the color of the coating should be basically the same, and there should be no defects such as cracks and peelings.

The actual surface micromorphology and 3D scanning morphology of the prepared rewinding roll are shown in Figure 1 and Figure 2, respectively.

Example 2

A preparation method of a rewinding roll with a surface anti-corrosion and wear-resistant composite roughening coating, comprising the following steps:

(1) Use metal cleaning agent to brush the surface of the carbon steel rewinding roll blank to remove the grease and stains on the surface of the rewinding roll;

(2) Protect the non-sandblasted part of the rewinding roller with copper skin, and blast its surface to roughen it. The sandblasting parameters are the blasting pressure: 0.50MPa, the blasting angle is 80°, the blasting sand is 24# brown corundum, and the blasting distance is 200mm;

(3) A layer of WC-10Co4Cr corrosion-resistant coating was prepared on the surface of the rewinding roll blank by supersonic flame spraying. The specific process parameters are as follows: the distance is 100mm, the powder feeding rate is 0.5g/min; the fuel flow rate is 15L/h, and the pressure is 12MPa; the oxygen flow rate is 40L/h, and the pressure is 15MPa; the argon gas flow rate is 5L/h, and the pressure is 0.8MPa; The thickness of the corrosion-resistant adhesive layer is 50μm;

(4) Prepare a layer of wear-resistant roughening coating on the surface of the anti-corrosion adhesive layer of the rewinding roller by atmospheric plasma spraying. The specific parameters are, argon flow: 60L/min, hydrogen flow: 8L/min, current: 600A, spraying Distance: 100mm; the powder used for the roughening layer is Ni60-10WC, the powder particle size is 150-200 mesh; the coating thickness is 300 microns, and the surface roughness is 15±3 μm;

(5) After the preparation of the wear-resistant roughening coating is completed, check the surface of the rewinding roller. The coating should be complete, the surface should be uniform and continuous, the color of the coating should be basically the same, and there should be no defects such as cracks and peelings.

Example 3

A preparation method of a rewinding roll with a surface anti-corrosion and wear-resistant composite roughening coating, comprising the following steps:

(1) Use metal cleaning agent to brush the surface of the carbon steel rewinding roll blank to remove the grease and stains on the surface of the rewinding roll;

(2) Protect the non-sandblasted part of the rewinding roller with copper skin, and blast its surface to roughen it. The sandblasting parameters are the blasting pressure: 0.50MPa, the blasting angle is 80°, the blasting sand is 24# brown corundum, and the blasting distance is 200mm;

(3) A layer of WC-10Co4Cr corrosion-resistant coating was prepared on the surface of the rewinding roll blank by supersonic flame spraying. The specific process parameters are as follows: distance is 500mm, powder feeding rate is 3g/min; fuel flow rate is 30L/h, pressure is 12MPa; oxygen flow rate is 60L/h, pressure is 15MPa; argon gas flow rate is 9L/h, pressure is 0.8 MPa; the thickness of the corrosion-resistant adhesive layer is 50 μm;

(4) Prepare a layer of wear-resistant roughening coating on the surface of the anti-corrosion adhesive layer of the rewinding roller by atmospheric plasma spraying. The specific parameters are, argon flow: 60L/min, hydrogen flow: 8L/min, current: 600A, spraying Distance: 100mm; the powder used for the roughening layer is Ni60-50WC, the powder particle size is 240-280 mesh; the coating thickness is 400 microns, and the surface roughness is 22±3 μm;

(5) After the preparation of the wear-resistant roughening coating is completed, check the surface of the rewinding roller. The coating should be complete, the surface should be uniform and continuous, the color of the coating should be basically the same, and there should be no defects such as cracks and peelings.

Verification example

The anti-corrosion and wear-resistant WC-10Co4Cr+Ni60-35WC composite roughening coating of Example 1 of the present invention was selected as the experimental group, and the single Ni60-35WC roughening coating by the plasma spraying method in the prior art was selected as the control group. The overall performance of the group is tested.

The cross-sectional metallographic structures of the roughened layers of the two groups are shown in Figure 3, in which the results of the experimental group are shown in Figure 3a, and the results of the control group are shown in Figure 3b;

The surface morphologies of the coatings after 24 hours of salt spray test in the two groups are shown in Figure 4, in which the results of the experimental group are shown in Figure 4a, and the results of the control group are shown in Figure 4b;

The comprehensive performance of the two groups is shown in Table 1:

Table 1

It can be seen from the above results that the surface anti-corrosion and wear-resistant roughening coating provided by the embodiment of the present invention is prepared by combining supersonic flame spraying and plasma spraying to prepare the anti-corrosion and wear-resistant composite roughening coating, compared with the single use method. The roughened coating on the surface of the rewinding roller prepared by supersonic flame spraying or plasma spraying has higher bonding strength, lower porosity, high coating uniformity, and the coating does not peel or crack in a humid and corrosive environment , No peeling, anti-wear and anti-corrosion effect is longer and more effective, the paper breaking rate is low, and the product quality has been further improved.

The above-mentioned section of the detailed description has made a specific introduction to the analysis method involved in the present invention. It should be noted that the above description is only for helping those skilled in the art to better understand the method and idea of the present invention, rather than limiting the related content. Without departing from the principles of the present invention, those skilled in the art can also make appropriate adjustments or modifications to the present invention, and the above adjustments and modifications should also belong to the protection scope of the present invention.

Claims (10)

1. a kind of preparation method of the rewind roll with the compound roughening coating of surface anticorrosive wear-resistant, includes the following steps:

(1) rewind roll blank surface is scrubbed using metal cleaner, removes the grease and spot of rewinding roller surface；Answering after cleaning Answer anhydrous, oily, dust, paint and other sundries in winding up roller surface；

(2) the non-sandblasting position of rewind roll is protected with copper sheet, and sandblasting roughening is carried out to its surface；

(3) prepared by rewind roll blank surface anticorrosion layer: preparing one layer of corrosion-resistant finishes in rewind roll blank surface；

(4) it the preparation of rewind roll surface abrasion resistance roughening coating: adopts and prepares one layer of wear-resisting roughening on rewind roll corrosion-resistant finishes surface Coating；

(5) after wear-resisting roughening coating preparation, rewinding roller surface is checked, coating should be complete, and surface uniformly continuous applies Layer color answer it is almost the same, flawless, peel off the defects of.

2. preparation method according to claim 1, which is characterized in that sand grains used in sandblasting described in step (2) is that palm fibre is rigid It is beautiful.

3. preparation method according to claim 2, which is characterized in that the parameter of sandblasting described in step (2) are as follows: sandblasting pressure Power: 0.20~1.00MPa, 60 ° of sandblasting angle >, 200~500mm of sandblasting distance.

4. preparation method according to claim 1, which is characterized in that corrosion-resistant finishes described in step (3) uses Supersonic Fast flame spray technique is sprayed.

5. the preparation method according to claim 4, which is characterized in that the parameter of the supersonic flame spraying are as follows: spraying Distance: 100-600mm, powder feeding rate: 0.5-5g/min；Fuel flow rate is 15-30L/h, pressure 11-13MPa；Oxygen gas flow rate For 40-60L/h, pressure 14-16MPa；Argon gas flow velocity is 5-9L/h, pressure 0.7-0.9MPa.

6. preparation method according to claim 5, which is characterized in that corrosion-resistant finishes described in step (3) is used Material in including but not limited to WC, WC-Co, WC-10Co4Cr, high-entropy alloy, NiTi, NiCr, Cr3C2-NiCr one Kind is a variety of；The powder size of the material is 20-50 μm；With a thickness of 5~150 μm, corrosion-resistant finishes needs equal corrosion-resistant finishes Even all standing.

7. preparation method according to claim 1, which is characterized in that wear-resisting roughening coating is using big described in step (4) Gas plasma spraying technology is sprayed.

8. preparation method according to claim 7, which is characterized in that the parameter of the air plasma spraying are as follows: argon gas Flow: 60L/min, hydrogen flowing quantity: 8L/min, electric current: 600A, spray distance: 100mm.

9. preparation method according to claim 8, which is characterized in that wear-resisting roughening coating described in step (4) is used Material be Ni60 (X) WC, wherein X be quality accounting of the WC ingredient in Ni60 (X) WC material, 0 < X < 60, Ni60 of value (X) WC powder granularity is 50-325 mesh；Wherein Ni60 ingredient mainly plays the effect of roughening coating table, and WC ingredient can increase roughening The wear-resisting property of layer；Wear-resisting roughening coating layer thickness is 10-1000 microns, and surface roughness is 5-30 μm.

10. what any one of -9 preparation methods were prepared according to claim 1 there is anticorrosive wear-resistant compound roughening in surface to apply The rewind roll of layer.