CN115055675B - Coating prepared from tungsten carbide reinforced phase composite powder - Google Patents
Coating prepared from tungsten carbide reinforced phase composite powder Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 71
- 239000011248 coating agent Substances 0.000 title claims abstract description 68
- 239000002131 composite material Substances 0.000 title claims abstract description 45
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 81
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 39
- 239000000919 ceramic Substances 0.000 claims abstract description 34
- 238000004372 laser cladding Methods 0.000 claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
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- 229910000601 superalloy Inorganic materials 0.000 claims abstract description 23
- 238000002360 preparation method Methods 0.000 claims abstract description 14
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- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 48
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- 239000010410 layer Substances 0.000 description 30
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- 229910000914 Mn alloy Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/12—Metallic powder containing non-metallic particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention provides a tungsten carbide reinforced phase composite powder, a coating and a preparation method thereof, wherein the tungsten carbide reinforced phase composite powder comprises tungsten carbide ceramic powder and nickel-based superalloy powder; wherein the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 30-40%. The tungsten carbide ceramic powder and the nickel-based alloy powder are mixed according to a specific proportion, and in the tungsten carbide reinforced phase alloy coating prepared by a laser cladding technology, tungsten carbide is not uniformly dispersed in the whole alloy coating structure, but is preferentially distributed at the bottom of the coating, so that a well-defined state of a tungsten carbide wear-resistant layer and a nickel-based alloy buffer layer is formed. With the improvement of the proportion of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder, the thicknesses of the tungsten carbide wear-resistant layer and the nickel-based alloy buffer layer are equal to each other, when the mass fraction of the tungsten carbide ceramic powder reaches 50%, the nickel-based alloy buffer layer is basically disappeared, and the tungsten carbide reinforced phase is basically uniformly dispersed and filled in the whole alloy coating.
Description
Technical Field
The invention relates to the technical field of material surface engineering, in particular to tungsten carbide reinforced phase composite powder, a coating and a preparation method thereof.
Background
In the field of steel rolling, semifinished steel billets from steelworks are rolled layer by layer into finished products by a rolling mill production line and used. The steel rolling production line equipment is provided with a batch of extremely large vulnerable parts, namely the steel passing guide roller. The billet with high temperature is processed into round bar products with various diameters through dozens of guide rollers with different sizes. The steel passing guide roller needs to work at a high temperature of 300 ℃ or higher, and the steel billet passes through the steel passing guide roller at an extremely high speed, and the steel passing guide roller is not only subjected to impact possibly from the steel billet, but also is worn due to contact. It is known that the steel guide roller used in the existing steel rolling production line is in a quenched state of steel, and has high hardness and certain wear resistance. However, it is realistic to replace one set of the steel guide roller every 4 hours, and the replacement time is not less than 15 minutes each time, and it is known that 1.5 tons of steel blanks are processed into finished products, and only a short 40 seconds or more is required. Therefore, the service life of the guide roller is prolonged, the replacement frequency of the guide roller is reduced, and the steel rolling yield can be effectively improved. As can be seen from the working condition of the steel guide roller, the performance requirement is wear resistance at high temperature and has better impact toughness.
The spraying technology is a coating preparation technology which is applied earlier, but compared with the laser cladding technology, the coating prepared by the technology is not completely metallurgically bonded with the substrate, so that the obtained coating has poor impact resistance, and once the coating is locally peeled off, chain reaction is easily formed, so that the coating is peeled off integrally. The welding technology can realize complete metallurgical bonding, but has a plurality of adverse factors such as large heat input, large stress, deformation generation, large processing removal amount and the like compared with the laser cladding technology. The laser cladding technology is a new surface modification technology which is developed in the 70 th century along with the development of high-power lasers, and can form a surface coating which has extremely low dilution rate and is metallurgically bonded with a substrate on the surface of a substrate, thereby obviously improving the performances of wear resistance, corrosion resistance, heat resistance, oxidation resistance and the like of the surface of the substrate.
The raw materials for laser cladding are usually wires, powders, etc., and the powders are mainly used. At present, a large amount of wear-resistant ceramic powder is developed at home and abroad, and the reinforced phase of tungsten carbide is mainly used. However, the most popular tungsten carbide wear resistant powders pursue a uniform distribution of the tungsten carbide reinforcing phase in the coating, which is prone to the following problems: the multi-layer cladding is easy to crack, and the cracking is thoroughly unbuffered until the substrate; the subsequent coating is difficult to lathe and has low grinding efficiency.
Disclosure of Invention
The invention provides tungsten carbide reinforced phase composite powder, a coating and a preparation method thereof, which are used for solving the problems that in the prior art, the coating is easy to crack due to multilayer cladding, and the cracking is thoroughly unbuffered until reaching a substrate; the subsequent coating is difficult to lathe and the grinding efficiency is very low.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the first aspect of the present invention provides a tungsten carbide reinforced phase composite powder comprising a tungsten carbide ceramic powder and a nickel-based superalloy powder; wherein the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 30-40%.
Further, the nickel-based superalloy powder is selected according to different grades of metal materials according to the hardness working condition of the coating of the steel guide roller, wherein the grades are Ni45 or Ni55 or Ni60.
Further, ni45 powder with hardness of 45HRC is selected as the nickel-based superalloy powder, and C, ni, cr, fe, si, B, mn alloy elements are contained.
Further, the sphericity of the tungsten carbide ceramic powder is more than or equal to 90 percent, and the particle size distribution range is 100-270 meshes.
Further, the sphericity of the nickel-based superalloy powder is more than or equal to 90 percent, and the particle size distribution range is 140-325 meshes.
A preparation method of tungsten carbide reinforced phase composite powder, which comprises the steps of mixing tungsten carbide ceramic powder and nickel-based superalloy powder in proportion; the mixing time is set to be 4-5 hours; drying the mixed tungsten carbide reinforced phase composite powder; and (5) loading the dried tungsten carbide reinforced phase composite powder into a powder bottle and shaking uniformly.
Further, the drying temperature is set to be 100-110 ℃ and the time is set to be 1-1.2h.
The coating prepared from the tungsten carbide reinforced phase composite powder is deposited on the surface of the steel guide roller in a laser cladding mode to form the coating.
Further, the thickness of the tungsten carbide reinforced phase alloy coating is 2-3mm.
Further, the number of the tungsten carbide reinforced phase alloy coating layers is 2-3.
Further, in the laser cladding mode, the laser power is 1500-2000W, the diameter of a light spot is 2-3mm, the powder feeding speed is 12-16g/min, the cladding scanning speed is 15-20mm/s, and the lap joint rate is 45-55%.
Further, the coating preparation process also comprises a laser cladding pretreatment of the steel guide roller, wherein the pretreatment comprises degreasing treatment and decontamination treatment.
Further, the coating preparation process also comprises preheating treatment before laser cladding of the steel guide roller, and the preheating temperature is set to 350-500 ℃.
Further, the coating preparation process also comprises the steps of carrying out stress relief heat treatment after the steel guide roller is subjected to laser cladding, wherein the heat treatment temperature is set to 350-500 ℃, and the heat preservation time is set to 2-3h.
The technical scheme of the invention has the following advantages or beneficial effects:
the tungsten carbide ceramic powder and the nickel-based alloy powder are mixed according to a specific proportion, and in the tungsten carbide reinforced phase alloy coating prepared by a laser cladding technology, tungsten carbide is not uniformly dispersed in the whole alloy coating structure, but is preferentially distributed at the bottom of the coating, so that a well-defined state of a tungsten carbide wear-resistant layer and a nickel-based alloy buffer layer is formed. With the improvement of the proportion of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder, the thicknesses of the tungsten carbide wear-resistant layer and the nickel-based alloy buffer layer are equal to each other, when the mass fraction of the tungsten carbide ceramic powder reaches 50%, the nickel-based alloy buffer layer is basically disappeared, and the tungsten carbide reinforced phase is basically uniformly dispersed and filled in the whole alloy coating.
The nickel-based alloy buffer layer can fully absorb impact force received by the coating, effectively inhibit and reduce initiation and propagation of coating cracks, and simultaneously reduce cracking tendency of the secondary cladding coating, so that multilayer cladding can be realized, and the nickel-based alloy buffer layer has almost no tungsten carbide reinforced phase distribution, so that turning is facilitated. The tungsten carbide wear-resistant layer can obviously increase the wear resistance of the surface of the steel guide roller, so that the service life of the steel guide roller is prolonged. The tungsten carbide wear-resistant layer and the nickel-based alloy buffer layer have good matching property, so that the wear resistance and impact resistance of the surface of the steel-passing guide roller are integrated, a plurality of problems that a coating is easy to crack, multiple layers of coatings are difficult to melt and follow-up turning is difficult are solved, and good economic benefits are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a macroscopic morphology and a crack flaw detection chart of a coating prepared by laser cladding a tungsten carbide reinforced phase composite powder provided in example 1 of the present application through a steel guide roller;
FIG. 2 is a schematic diagram showing the structure of a cross-section of a coating layer prepared by laser cladding a steel guide roller with the tungsten carbide reinforced phase composite powder provided in example 1 of the present application;
fig. 3 is a schematic cross-sectional view of a coating prepared by laser cladding a steel guide roller with the tungsten carbide reinforced phase composite powder provided in example 1 of the present application.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily obscure the present invention.
The inventor finds that through long-term experiments: the tungsten carbide reinforced metal matrix composite powder is mainly characterized in that tungsten carbide reinforced phases are uniformly dispersed in an alloy coating, and the dispersion is beneficial to the whole coating performance, can play a certain role in dispersion strengthening, but is disadvantageous to multilayer cladding and turning. The tungsten carbide which is uniformly dispersed enhances the wear resistance of the coating, so that the turning of the coating is extremely difficult, the grinding efficiency is extremely low, and when the multilayer laser cladding is carried out on the tungsten carbide reinforced phase alloy coating which is uniformly dispersed, local stress concentration is easily caused to initiate cracks and the cracks are quickly expanded.
In view of this, the present application creatively proposes a tungsten carbide reinforced phase composite powder applied to an over-steel guide roller, the components of which include tungsten carbide ceramic powder and nickel-based superalloy powder. The mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 30-40%, the nickel-based superalloy powder has the brands of Ni45, ni55, ni60 and the like according to the specific hardness working conditions of the steel guide roller, but the main chemical components of the nickel-based superalloy powder all have C, cr, si, fe, B, mn, and the balance is Ni and trace impurity elements. By way of reference, the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforcing phase composite powder is 30%, 35%, 40%, but may also be any value between 30% and 40%. The tungsten carbide ceramic powder and the nickel-based superalloy powder are both gas-atomized spherical powder, the sphericity is more than or equal to 90%, wherein the particle size of the tungsten carbide ceramic powder is 100-270 meshes, and the particle size of the nickel-based superalloy powder is 140-325 meshes. It should be noted that powder parameters such as particle size range, sphericity and the like have a great influence on the quality of the cladding layer. Too large or too small particle size can affect the powder conveying stability, resulting in poor coating forming quality; poor sphericity can cause local stress concentration of the coating, and cracks are easier to initiate.
Correspondingly, the application also provides a preparation method of the tungsten carbide reinforced phase composite powder, which comprises the following steps: mixing tungsten carbide ceramic powder and nickel-base superalloy powder in proportion.
The powder preparation step takes 1000g of tungsten carbide reinforced phase composite powder containing 30% of tungsten carbide ceramic powder by mass fraction as an example. Firstly, respectively weighing 300g of tungsten carbide ceramic powder and 700g of nickel-based superalloy powder by using an electronic scale, mixing the two powders, placing the two powders in a mechanical mixing device container, setting parameters of the mechanical mixing device to mechanically mix, and optionally setting the total mixing time to be 5h and the forward and reverse transfer stacking period to be 2min; secondly, placing the tungsten carbide reinforced phase composite powder mechanically mixed in the previous step into a baking oven for baking treatment, wherein the baking temperature is set to be 100 ℃ and the baking time is set to be 1h; and thirdly, placing the tungsten carbide reinforced phase composite powder dried in the last step into a powder bottle, taking the powder bottle by hand to draw a character 8 in the air to shake the powder for later use (or shake the powder in other modes), and optionally setting the manual shaking time to be 10 minutes.
In addition, the application also provides a tungsten carbide reinforced phase alloy coating and a preparation process thereof. In an alternative embodiment, the tungsten carbide reinforced phase alloy coating has a thickness of 2-3mm and the number of laser cladding alloy coatings is 2-3. The specific operation steps are as follows: firstly, cleaning and pre-treating the surface of a steel guide roller, including degreasing, rust removal and the like; secondly, preheating the steel guide roller subjected to the cleaning pretreatment in the previous step, and using 20KW medium-frequency induction heating equipment, wherein the preheating temperature is optionally set to be 350-500 ℃; and thirdly, carrying out laser cladding on the tungsten carbide reinforced phase composite powder on the steel-passing guide roller which is subjected to the preheating treatment in the last step, wherein the technological parameters are mainly that the laser power is 1500-2000W, the spot diameter is about 2-3mm, the powder feeding speed is 12-16g/min, the cladding scanning speed is 15-20mm/s, and the lap joint rate is 45-55%. And fourthly, placing the steel guide roller obtained by laser cladding in the previous step in a heat treatment furnace for stress relief annealing treatment, wherein the stress relief annealing temperature is set to 350-500 ℃ and the heat preservation time is set to 2-3h.
Example 1
The embodiment provides tungsten carbide reinforced phase composite powder applied to a steel guide roller and a tungsten carbide reinforced phase alloy coating prepared from the tungsten carbide reinforced phase composite powder.
The raw materials of the tungsten carbide reinforced phase composite powder comprise tungsten carbide ceramic powder and nickel-based superalloy powder, wherein the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 30%, the nickel-based superalloy powder is Ni45 powder with the hardness of about 45HRC, and the chemical components of the nickel-based superalloy powder mainly comprise C0.45%, cr12%, si4%, fe10%, B2.4%, mn0.1%, and the balance of Ni and trace impurity elements. The sphericity of the tungsten carbide ceramic powder and the nickel-based superalloy powder is more than or equal to 90 percent, the particle size of the tungsten carbide ceramic powder is 100-270 meshes, and the particle size of the nickel-based superalloy powder is 140-325 meshes.
The tungsten carbide reinforced phase composite powder is prepared by the following steps: the tungsten carbide ceramic powder and the nickel-based superalloy powder are weighed according to the mass ratio, then are put into mechanical equipment for stirring and mixing for 5 hours, are taken out and are put into a drying box for drying at 100 ℃ for 1 hour, and are taken out and put into a powder bottle for 8-character manual shaking for 10 minutes for standby.
The tungsten carbide reinforced phase composite powder is subjected to reinforcement and remanufacturing on the surface of a steel guide roller by adopting a laser cladding technology in the prior art, and the specific steps are as follows: pretreating the surface of the steel guide roller, and removing oil and dirt by using alcohol; planning a laser cladding path according to the geometric shape of the steel guide roller; preheating a steel guide roller by adopting medium-frequency induction heating equipment, wherein the preheating temperature is 400 ℃; the method adopts fiber laser cladding equipment to prepare the coating of the steel guide roller, and comprises the following technological parameters: laser power 1500W, laser scanning speed 15mm/s, light spot diameter 2mm, powder feeding speed 14g/min, overlap ratio 50%, cladding 2 layers; after cladding, stress relief annealing is carried out for 2 hours at 400 ℃, and cooling is carried out along with the furnace.
And carrying out crack penetration flaw detection and metallographic testing on the steel guide roller cooled along with the furnace, and measuring the thicknesses of the tungsten carbide wear-resistant layer and the nickel-based alloy buffer layer through a microscope scale, wherein the result is as follows: the macro morphology and crack detection of the coating of the guide roller of the steel obtained in the embodiment are shown in figure 1; the metallographic structure of the section of the coating is shown in figure 2. As can be seen from fig. 1 and 2: the coating obtained by the embodiment has good molding quality, no crack is generated, and the coating and the base material are metallurgically bonded; the total thickness of the coating monolayer is 1mm, the tungsten carbide wear-resistant layer and the nickel-based alloy buffer layer are clear, the thicknesses of the tungsten carbide wear-resistant layer and the nickel-based alloy buffer layer are respectively 0.6mm and 0.4mm, and the thickness ratio is 3:2. a schematic cross-sectional view of a coating prepared by laser cladding a steel guide roller with the tungsten carbide reinforced phase composite powder provided in the embodiment is shown in fig. 3. In fact, the thickness of the nickel-based alloy buffer layer between the two tungsten carbide wear layers is reduced due to the penetration condition of the second layer during cladding, so that the two tungsten carbide wear layers have almost no obvious boundary; the nickel-based alloy buffer layer produced by cladding the second layer has almost no tungsten carbide distribution, and is beneficial to turning.
Comparative example 2:
this embodiment differs from embodiment 1 in that: the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 35%.
Comparative example 3:
this embodiment differs from embodiment 1 in that: the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 40%.
The coatings obtained in comparative examples 2 and 3 were tested by the same test method as in example 1, and the results are shown in table 1:
table 1 test results
WC duty cycle: the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder.
As can be seen from table 1, the nickel-base alloy buffer layer thickness gradually decreases as the tungsten carbide ceramic powder ratio increases. To ensure the subsequent turning, the thickness of the nickel-base alloy buffer layer is controlled, which is mainly determined by two aspects: tungsten carbide ceramic powder ratio and monolayer thickness values. Alternatively, if the turning amount is 0.3mm, the coating can reach the smooth surface, and the thickness of the nickel-based alloy buffer layer is at least 0.3mm for facilitating turning, then the tungsten carbide can be selected to be 35% in proportion to the single layer thickness of 1mm, and the tungsten carbide can be selected to be 40% in proportion to the single layer thickness of 1.5mm.
In conclusion, the tungsten carbide reinforced phase composite powder can effectively solve the problems that multilayer cladding of a steel guide roller is extremely easy to crack, coating turning is difficult, efficiency is low and the like. The tungsten carbide reinforced phase alloy coating prepared by the method is metallurgically combined with the substrate of the steel guide roller, has no cracks, is easy to machine, has good wear resistance and high-temperature mechanical property, and has important popularization significance for improving the surface property of the steel guide roller and increasing the yield of the steel.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (4)
1. A coating made from a tungsten carbide reinforced phase composite powder, wherein the tungsten carbide reinforced phase composite powder comprises a tungsten carbide ceramic powder and a nickel-based superalloy powder; wherein, the mass fraction of the tungsten carbide ceramic powder in the tungsten carbide reinforced phase composite powder is 35-40%; the sphericity of the tungsten carbide ceramic powder is more than or equal to 90 percent, and the particle size distribution range is 100-270 meshes; the sphericity of the nickel-based superalloy powder is more than or equal to 90 percent, and the particle size distribution range is 140-325 meshes; the nickel-based superalloy powder is Ni45 powder with the hardness of 45HRC, and the chemical components of the nickel-based superalloy powder are C0.45%, cr12%, si4%, fe10%, B2.4%, mn0.1%, and the balance of Ni and trace impurity elements; in the tungsten carbide reinforced phase alloy coating prepared by the tungsten carbide reinforced phase composite powder through a laser cladding technology, tungsten carbide is unevenly dispersed and distributed in the whole alloy coating tissue; the tungsten carbide reinforced phase composite powder is deposited on the surface of the steel guide roller in a laser cladding mode to form a coating, the thickness of the tungsten carbide reinforced phase alloy coating is 2-3mm, and the number of layers of the tungsten carbide reinforced phase alloy coating is 2-3; in the laser cladding mode, the laser power is 1500-2000W, the diameter of a light spot is 2-3mm, the powder feeding speed is 12-16g/min, the cladding scanning speed is 15-20mm/s, and the lap joint rate is 45-55%.
2. The coating made of the tungsten carbide reinforced phase composite powder according to claim 1, wherein the coating preparation process further comprises a laser cladding pretreatment of the steel guide roller, and the pretreatment comprises degreasing treatment and decontamination treatment.
3. The coating prepared from the tungsten carbide reinforced phase composite powder according to claim 1, wherein the coating preparation process further comprises preheating treatment before laser cladding of the steel guide roller, and the preheating temperature is set to 350-500 ℃.
4. The coating prepared from the tungsten carbide reinforced phase composite powder according to claim 1, wherein the coating preparation process further comprises a step of carrying out stress relief heat treatment after the steel guide roller is subjected to laser cladding, wherein the heat treatment temperature is set to be 350-500 ℃, and the heat preservation time is set to be 2-3h.
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| CN211005617U (en) * | 2019-06-21 | 2020-07-14 | 山东雷石智能制造股份有限公司 | Hybrid system based on laser cladding and turning are integrative |
| CN110424010B (en) * | 2019-09-02 | 2021-07-06 | 海南核电有限公司 | Laser cladding coating for improving water corrosion resistance of brazing stellite alloy and preparation method thereof |
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