CN110293131B - High-temperature-resistant wear-resistant roller and production process thereof - Google Patents
High-temperature-resistant wear-resistant roller and production process thereof Download PDFInfo
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- CN110293131B CN110293131B CN201910580919.5A CN201910580919A CN110293131B CN 110293131 B CN110293131 B CN 110293131B CN 201910580919 A CN201910580919 A CN 201910580919A CN 110293131 B CN110293131 B CN 110293131B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/26—Hardness of the roll surface
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- Crystallography & Structural Chemistry (AREA)
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- Coating By Spraying Or Casting (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention provides a high-temperature-resistant and wear-resistant roller and a production process thereof, and relates to the technical field of steel continuous casting and hot rolling, the roller comprises a roller base body, a welding layer and a coating, wherein the welding layer is welded on the outer surface of the roller base body, the coating is sprayed on the peripheral side of the welding layer, the coating is made of WC-Co materials, and the hardness HB of welding materials forming the welding layer is larger than or equal to 280. The high-temperature-resistant and wear-resistant roller provided by the invention can meet the requirement of the expected service life in production, and reduces the cost of manpower and material resources.
Description
Technical Field
The invention relates to the technical field of steel continuous casting and hot rolling, in particular to a high-temperature-resistant and wear-resistant roller and a production process thereof.
Background
Because the rollers at the continuous casting and hot rolling parts bear high-temperature corrosion and transmission abrasion, the service life of the rollers can not meet the expected use requirement, and the cost of manpower and material resources is high due to frequent replacement of the rollers. On this basis, it is an urgent need to provide rollers with a long service life.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant and wear-resistant roller. The roller can meet the requirement of the expected service life in production, and the cost of manpower and material resources is reduced.
The invention also aims to provide a production process of the high-temperature-resistant and wear-resistant roller. The production process is simple and scientific in design, and can exert the wear-resisting and high-temperature-resisting properties of the high-temperature-resisting and wear-resisting roller.
The invention is realized by the following steps:
the roller comprises a roller base body, a welding layer and a coating, wherein the welding layer is welded on the outer surface of the roller base body, the coating is sprayed on the outer peripheral side of the welding layer, the coating is made of WC-Co materials, the WC-Co materials are powder, the particle size is 5-30 micrometers, the hardness HB of the welding materials forming the welding layer is larger than or equal to 280, and the hardness of the coating is larger than or equal to HV 1300.
In a preferred embodiment of the present invention, the roller base body is made of weldable carbon steel or weldable low-alloy structural steel, and the welding material of the welding layer is a surfacing welding material.
In a preferred embodiment of the present invention, the overlay welding material is a 0Cr17 overlay welding material, and the chemical composition of the 0Cr17 overlay welding material includes, by mass%, Cr: 16.5-19.0%, Mn: 0.8-1.5%, C: 0-0.08%, Si: 0.5-1.0%, P: 0-0.02% and S: 0-0.02%, and the effective thickness of the welding layer is 2-5 mm.
In the preferred embodiment of the invention, the material of the coating is WC-15Co, and the thickness of the coating is 0.05-0.5 mm.
A production process of a high-temperature-resistant and wear-resistant roller comprises the following steps of: and (3) firstly, carrying out bead welding on the outer circle surface of the roller substrate, forming a welding layer by using a welding material with the hardness HB being not less than 280, and spraying a WC-Co material on the outer periphery side of the welding layer, wherein the hardness of the coating is not less than HV 1300.
In an embodiment of the present invention, before the overlay welding, the rough roller base further includes: the outer circle of the roller base body is directly machined to the size before surfacing, and machining allowance is reserved at other parts of the roller base body.
In an embodiment of the invention, after the overlaying welding, the method further includes stress relief annealing, where the stress relief annealing specifically includes: and (3) performing stress annealing on the roller substrate after surfacing at the temperature of 470-500 ℃ for 3 hours, discharging the roller substrate from the furnace for air cooling after the furnace body is cooled to the temperature of 100-150 ℃, and then performing finish machining treatment, wherein the hardness HB of the welded layer after finish machining is not less than 280.
In a preferred embodiment of the present invention, the above-mentioned production process further includes cleaning and blasting after finishing, and the cleaning and blasting specifically includes: after finishing, the surface of the welding layer is cleaned and degreased, and sandblasted and roughened.
In a preferred embodiment of the present invention, the method for spraying the WC-Co material on the outer peripheral side of the welding layer is a supersonic flame spraying method, and the hardness of the coating is ≧ HV 1300.
In the embodiment with the better application, the production process further comprises the steps of coating a high-temperature hole sealing agent on the outer surface of the roller sprayed with the WC-Co material, and then keeping the temperature of the roller at 220-350 ℃ for 3-5 hours for heat preservation and solidification;
preferably, the roller is placed into a vacuum furnace with the temperature of 250 ℃ for heat preservation for 4 hours, and the roller is taken out after the furnace body is naturally cooled to the normal temperature.
Compared with the prior art, the invention has the beneficial effects that:
the roller section material provided by the invention adopts a three-layer structure, and each layer of structure has the characteristics. The outermost layer is directly contacted with an external high-temperature environment, a corrosion environment and rolling friction, a WC-Co material is adopted, the WC has special corrosion resistance, high hardness and compressive strength and high wear resistance, the Co material has good toughness and can be used as a WC adhesive, so that WC particles have firm strength, and the hardness of the coating is not less than HV 1300; the roller base material adopts weldable carbon steel or low-alloy structural steel, which can meet the strength of the roller base body and the weldability of the roller base body; the alloy with higher hardness, HB ≧ 280, of the intermediate surfacing welding can resist the pressure when the surface hard alloy WC-Co is pressed in, and meanwhile, the alloy also has certain toughness, so that the cracking and the block dropping of a wear-resistant layer are avoided. In addition, WC also has a heat insulation effect, so that the relative temperature of the inside of the roller is lower, and the cracking phenomenon of the base material is greatly reduced. The roller adopts a three-layer structure, so that the whole service life of the roller is greatly prolonged. By providing the production process of the high-temperature-resistant and wear-resistant roller, the overall high-temperature resistance and wear resistance of the roller are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a longitudinal sectional view of a roll according to embodiment 1 of the present invention.
Icon: 100-a roller; 110-roll base; 120-a solder layer; 130-coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when in use, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The roller comprises a roller base body, a welding layer and a coating, wherein the welding layer is welded on the outer surface of the roller base body, the coating is sprayed on the outer peripheral side of the welding layer, the coating is made of WC-Co materials, and the hardness HB of a welding material forming the welding layer is larger than or equal to 280.
The roller base body is made of weldable carbon steel or weldable low-alloy structural steel, and the welding material of the welding layer is a surfacing welding material. The material of the roller base body is any one of Q345, Q390, 35CrMo and 42CrMo, and in other embodiments, the material of the roller base body can also be other weldable carbon steel or weldable low-alloy structural steel.
Further, the surfacing welding material is a 0Cr17 surfacing material, and the chemical composition of the 0Cr17 surfacing material comprises Cr: 16.5-19.0%, Mn: 0.8-1.5%, C: 0-0.08%, Si: 0.5-1.0%, P: 0-0.02% and S: 0-0.02%, and the effective thickness of the surfacing layer is 2-5 mm. The material of the overlaying layer is ferrite base material, and the base material of the overlaying layer and the base material of the roller belong to ferrite, so that the overlaying layer can be easily welded with the roller. The hardness of the overlay is high, and the overlay can provide enough support resistance for the outermost coating.
Further, the material of the coating is NiCrBSi or WC-15Co, preferably WC-15Co, and the thickness of the coating is 0.05-0.12 mm. The tungsten carbide hard alloy material has special corrosion resistance, high hardness and compressive strength and extremely high wear resistance, but is a sintering material and has brittleness, and can be applied only by being combined with tough metal. The tough metal cobalt can be used as a good bonding agent of WC to prepare a friction and wear resistant coating. The WC spraying material with the cobalt content accounting for 15% is adopted, so that sufficient adhesion of Co and WC is facilitated, sufficient tensile strength of the coating is ensured, and the coating is not brittle. The hardness of the coating is larger than or equal to HV1300, and the coating has enough wear resistance, so that the thin coating sprayed on the surface of the roller can completely meet the wear resistance of the roller.
A production process of a high-temperature-resistant and wear-resistant roller comprises the following steps of: firstly, roughly processing a roller base body, then surfacing welding materials on the outer circle surface of the roller base body to form a welding layer, carrying out stress relief annealing, carrying out cleaning and sand blasting after finishing, and finally spraying WC-Co materials on the outer periphery side of the welding layer.
Further, the roughing roller base body specifically includes: the outer circle of the roller base body is directly machined to the size before surfacing, and machining allowance is reserved at other parts of the roller base body.
Further, the stress relief annealing specifically includes: and (3) performing stress annealing on the roller substrate after surfacing at the temperature of 470-500 ℃ for 3 hours, discharging the roller substrate from the furnace for air cooling after the furnace body is cooled to the temperature of 100-150 ℃, and then performing finish machining treatment, wherein the hardness HB of the welded layer after finish machining is not less than 280. The purpose of annealing is to remove stress generated during welding, and the hardness HB ≧ 280 is beneficial for improving the capability of resisting the pressing-in of the coating.
Further, the cleaning is performed after the finish machining, and the blasting specifically includes: after finishing, the surface of the welding layer is cleaned and degreased, and sandblasted and roughened. The surface cleaning and deoiling can prevent the sprayed material and the welding layer from being cut and cracked by oil dirt, which causes poor contact and influences the contact strength of the contact surface; the sand blasting and galling are beneficial to increasing the contact area and the mutual meshing force of the coating and the welding layer, and are beneficial to increasing the interface bonding force between the coating and the welding layer.
Furthermore, the method for spraying the WC-Co material on the outer periphery of the welding layer adopts a supersonic flame spraying method. Supersonic flame spraying, so that the binder Co of the spraying powder is in a semi-molten state, and the deformation of the spraying particles is firmly combined with the surface of the welding layer under the spraying of high-speed jet flow, and the hardness of the coating is not less than HV 1300.
In addition, the tungsten carbide/cobalt material is easy to decompose when being heated, the tungsten carbide coating structure and performance are very sensitive to the preparation process, and the supersonic flame spraying method can effectively accelerate the particle movement under the condition of not excessively heating tungsten carbide/cobalt metal ions. The high-speed movement of the powder particles greatly reduces the retention time at high temperature, so that the content of oxides in the coating is lower, the chemical components and the composition of the phases have higher stability, the combination dressing degree of the particles is improved, the porosity of the coating is reduced, and the residual stress in the coating is also improved.
Further, the production process also comprises the steps of coating a high-temperature hole sealing agent on the outer surface of the roller sprayed with the WC-Co material, and then keeping the temperature of the roller at 220-350 ℃ for 3-5 hours for heat preservation and solidification;
preferably, the roller is placed into a vacuum furnace with the temperature of 250 ℃ for heat preservation for 4 hours, and the roller is taken out after the furnace body is naturally cooled to the normal temperature. The high-temperature hole sealing agent can effectively fill a large number of coating holes, effectively avoid corrosion invasion, is beneficial to reducing friction and enhancing the corrosion resistance and the friction resistance of the coating, is heated and cured in a vacuum furnace, and is beneficial to the hole sealing agent to penetrate into the holes and seal the holes.
Examples
Referring to FIG. 1, the structure of a roll 100 includes three layers, from the inside out, a roll base 110, a weld layer 120, and a coating 130. Wherein the roller base body 110 is made of Q390, the welding layer 120 is a 430-grade welding wire of Shanghai Setilli, and the welding wire comprises the chemical components of 16.5-19.0 Cr, 0.8-1.5 Mn, less than or equal to 0.08C, 0.5-1.0 Si, less than or equal to 0.02P and less than or equal to 0.02S; the material of the coating is WC-15Co, and the hardness of the coating is not less than HV 1300.
The production method of the high-temperature-resistant and wear-resistant roller specifically comprises the following steps: firstly, roughly machining the roller base body 110 of the roller 100, so that the outer circle of the roller base body 110 is directly machined to the size before overlaying, and machining allowance is reserved at other places. Overlaying 430 welding materials on the outer circle surface of the roller base body 110, placing the roller 100 into an annealing furnace after welding, preserving heat for 3 hours at 480 ℃, then cooling to 150 ℃ along with the furnace, discharging from the furnace, air cooling, wherein the surface hardness of the overlaying materials is HB 294; cooling, performing finish machining, cleaning, removing oil, blasting sand and napping; then, the outer surface of the roller 100 is sprayed with WC-15Co material in supersonic speed, then the high-temperature hole sealing agent is coated, the roller is placed in a vacuum furnace with the vacuum degree of less than 30Pa, the roller is heated and solidified at 250 ℃ for 4 hours, then the roller is cooled to normal temperature along with the furnace, and the surface hardness of the coating is measured to be HV 1394.
Compared with the original roller of south-yang-Han-metallurgy special steel company Limited, the wear-resistant roller prepared by the embodiment has the advantages that the steel passing amount of the wear-resistant roller reaches 2500 furnaces, and the steel passing amount of the original roller is only 500 furnaces.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The roller is characterized by comprising a roller base body, a welding layer and a coating, wherein the welding layer is welded on the outer surface of the roller base body, the coating is sprayed on the outer peripheral side of the welding layer, the coating is made of WC-15Co, the thickness of the coating is 0.05-0.5mm, the WC-15Co is powder with the particle size of 5-30 micrometers, the hardness HB of the welding material forming the welding layer is not less than 280, and the hardness of the coating is HV 1394;
the roller base body is made of any one of Q390, 35CrMo and 42 CrMo; the welding material of the welding layer is a surfacing welding material;
the surfacing welding material is a 0Cr17 surfacing material, and the chemical components of the 0Cr17 surfacing material comprise Cr: 16.5-19.0%, Mn: 0.8-1.5%, C: 0-0.08%, Si: 0.5-1.0%, P: 0-0.02% and S: 0-0.02%, and the effective thickness of the welding layer is 2-5 mm.
2. A process for producing a high-temperature resistant, wear-resistant roller according to claim 1, characterized in that it comprises the following steps carried out in sequence: firstly, forming a welding layer by overlaying welding materials with the hardness HB being equal to or larger than 280 on the outer circle surface of the roller matrix, and then spraying a WC-15Co material on the outer periphery side of the welding layer, wherein the hardness of the coating is HV 1394;
still include the annealing of destressing after carrying out the build-up welding, the annealing of destressing specifically includes: performing stress annealing on the roller substrate after surfacing at the temperature of 470-500 ℃ for 3 hours, cooling the roller substrate to the temperature of 100-150 ℃ in a furnace body, discharging the roller substrate out of the furnace, performing air cooling, and performing finish machining treatment, wherein the hardness HB of a welding layer after finish machining is not less than 280;
the production process also comprises cleaning and sand blasting after finishing, wherein the cleaning and sand blasting specifically comprise the following steps: after finish machining, cleaning and deoiling the surface of the welding layer, and performing sand blasting and galling;
the production process also comprises the steps of coating a high-temperature hole sealing agent on the outer surface of the roller sprayed with the WC-15Co material, putting the roller into a vacuum furnace at 250 ℃ for heat preservation for 4 hours, and discharging the roller when the furnace body is naturally cooled to normal temperature.
3. The production process according to claim 2, further comprising a roughing roller base before the overlay welding, the roughing roller base specifically comprising: and directly processing the excircle of the roller base body to the size before surfacing, and reserving machining allowance at other parts of the roller base body.
4. The production process according to claim 2, wherein the method of spraying the WC-15Co material on the outer peripheral side of the weld layer employs a supersonic flame spraying method.
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| CN201910580919.5A CN110293131B (en) | 2019-06-27 | 2019-06-27 | High-temperature-resistant wear-resistant roller and production process thereof |
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| CN201910580919.5A CN110293131B (en) | 2019-06-27 | 2019-06-27 | High-temperature-resistant wear-resistant roller and production process thereof |
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| CN110293131B true CN110293131B (en) | 2021-02-09 |
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| CN111545745A (en) * | 2020-05-19 | 2020-08-18 | 马鞍山市恒泰重工机械有限公司 | Centrifugal composite roller surface high-temperature-resistant coating and production process thereof |
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