CN110004372B - High-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller and preparation method thereof - Google Patents
High-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller and preparation method thereof Download PDFInfo
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- CN110004372B CN110004372B CN201910430637.7A CN201910430637A CN110004372B CN 110004372 B CN110004372 B CN 110004372B CN 201910430637 A CN201910430637 A CN 201910430637A CN 110004372 B CN110004372 B CN 110004372B
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- 230000003647 oxidation Effects 0.000 title claims abstract description 24
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 102
- 239000011248 coating agent Substances 0.000 claims abstract description 101
- 239000000843 powder Substances 0.000 claims abstract description 46
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 45
- 239000000956 alloy Substances 0.000 claims abstract description 45
- 239000000758 substrate Substances 0.000 claims abstract description 40
- 239000002131 composite material Substances 0.000 claims abstract description 32
- 229910000746 Structural steel Inorganic materials 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims description 53
- 239000011159 matrix material Substances 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 238000005098 hot rolling Methods 0.000 claims description 14
- 238000000137 annealing Methods 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000009628 steelmaking Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 7
- 238000007788 roughening Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 150000001247 metal acetylides Chemical class 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims 3
- 239000003963 antioxidant agent Substances 0.000 claims 2
- 230000003078 antioxidant effect Effects 0.000 claims 2
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000007670 refining Methods 0.000 description 1
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- 238000005204 segregation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- 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
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C23C4/04—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
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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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
- C23C4/134—Plasma spraying
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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
- C23C4/18—After-treatment
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention provides a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller and a preparation method thereof, and relates to the technical field of metallurgical roller preparation, the metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are C0.11-0.15%, Al 0.035-0.08%, Mn 0.32-0.63%, S0.008-0.016%, P0.012-0.027%, Si 0.06-0.15%, N0.001-0.003%, Als 0.011-0.052%, and Fe 98.69-99.18%, and the composite coating is made of alloy powder.
Description
Technical Field
The invention relates to the technical field of metallurgical roller preparation, in particular to a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller and a preparation method thereof.
Background
At present, the metallurgy roller generally used in the metallurgy industry is a casting roller and a forging roller which are obtained by adopting alloy tool steel through steel making, casting and heat treatment, and steel making, ingot casting, forging and heat treatment. The biggest problem of the traditional metallurgical roller is that the surface is worn or the roller can be repaired by one-time repair welding after chipping off, and the bonding strength of repair welding metal and a matrix is greatly reduced, so that the life cycle is short. On the premise of continuous production, the life cycle of each roller (namely before repair) is only 3-6 days, and the life cycle after repair is not more than 10 days. However, the cost of the metallurgical rolls made of the integral alloy tool steel is relatively high, so that the cost per ton of steel produced by enterprises is greatly increased.
In the prior art, a carbon structural steel forged rod is used as a substrate, micron-sized WC, CrC and NiC powder are used as coating materials, and a thin coating III is formed on the surface of the substrate by adopting a spraying technology. The new metallurgical roller thus obtained, the damaged coating can be repaired by spraying again, thus ensuring the repeated use of the matrix. On the premise of continuous production, the life cycle of each roller is not less than 3 days, and the life cycle accumulated according to 5 times of spraying can reach 15 days. The increase of the thickness of the coating can improve one-time life cycle, but the thickened coating is easy to fall off under the comprehensive actions of large thermal expansion amount of the matrix, high-temperature impact load, high-temperature oxidation and the like.
The plasma laser spraying technology is characterized in that a laser heat source is added simultaneously in the plasma spraying process, and a plasma flame and a laser beam are compounded together in a paraxial compounding mode so that the plasma flame and the laser beam are always superposed when acting on the flame flow center of the surface to be deposited of a substrate. In the deposition process, two heat sources simultaneously heat the sprayed particles and the surface of the matrix to realize the preparation of the coating.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller and the preparation method thereof.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are 0.11-0.15% of C, 0.035-0.08% of Al, 0.32-0.63% of Mn, 0.008-0.016% of S, 0.012-0.027% of P, 0.06-0.15% of Si, 0.001-0.003% of N, 0.011-0.052% of Als and 98.69-99.18% of Fe, and the raw material of the composite coating is alloy powder.
Further, the composite coating comprises a first coating, a second coating and a third coating from inside to outside in sequence, wherein the first coating is prepared by mixing one or more of iron self-fluxing alloy powder, aluminum self-fluxing alloy powder and nickel self-fluxing alloy powder, the second coating is prepared by mixing one or more of SiC, ZrC and Co superfine carbide special alloy powder, and the third coating is prepared by mixing one or more of micron-sized BN, CrN and TiC alloy powder.
Furthermore, the coating I is made of nickel self-fluxing alloy powder, the coating II is a mixture of special alloy powder of SiC and Co fine carbides, and the coating III is made of a mixture of BN and CrN alloy powder.
The preparation method of the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises the following steps:
1) preparing a matrix: taking the raw materials according to a certain proportion, preparing a steel billet through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billet to obtain a matrix;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, and irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
Further, in the step 1), the heating temperature before hot rolling is 1230-.
Further, in the step 2), during the plasma laser spraying, the laser power is 2100W-2300W, the spraying distance is 90-100mm, and the spraying speed is 270-.
(III) advantageous effects
The invention provides a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller and a preparation method thereof.
The three-layer composite coating replaces the traditional cast-state, forged-state, insert-welding and surface single-phase wear-resistant coating of the metallurgical roller, and meets the complex technical requirements of wear resistance, high temperature resistance, oxidation resistance, creep resistance and the like of the metallurgical roller. In the three layers of composite coatings, the first coating is fused with the base body of the metallurgical roller, so that the adhesion degree of the coating and the base body is increased; the third coating improves key physicochemical properties of the product, such as oxidation resistance, wear resistance and the like; the second coating isolates external high temperature, and ensures that the first coating and the third coating are relatively stable. By adopting a plasma laser spraying technology, the plasma spraying speed is high, the limitation on the spraying material and the base material is less, the powder material can be completely fused by laser spraying without the dual advantages of the limitation of the shape and the granularity of powder particles, and the surface activity of the base body can be activated by preheating the surface of the structural steel base body by laser; the low-power laser beam is used for irradiating the center point of the plasma jet flow, so that the complete melting of the jet particles can be promoted, the gas ultra-fine particle flow is used for promoting the refining of the melted particles, the compactness of the coating is improved, the joint sealing property of the coating and a matrix is improved, the irradiation of the low-power laser beam is easy to control, the problem that a high-melting-point material is difficult to melt in the ultrasonic plasma spraying process is effectively solved, the multilayer high-speed spraying can be completed in a very short time, the maximum spraying thickness can reach more than 3mm, and the preparation requirement of a; by utilizing laser secondary remelting, alloy powder can be secondarily hot-melted on the surface of the matrix at high temperature, so that micro-melting is generated between the multilayer coating and the surface of the base material and metallurgical bonding is generated, and a remelted layer with fine and uniform dendritic crystals and low segregation degree is obtained. Through atomic diffusion between the coating and the matrix, the porosity of the coating can be reduced to below 0.3 percent, the tissue compactness is improved, the crack tendency is reduced, and the service life of the metallurgical roller is prolonged.
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 embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.
Example 1:
a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are 0.11% of C, 0.08% of Al, 0.32% of Mn, 0.008% of S, 0.012% of P, 0.15% of Si, 0.003% of N, 0.052% of Als and 98.72% of Fe, the composite coating is made of alloy powder, the composite coating is sequentially made of a first coating, a second coating and a third coating from inside to outside, the first coating is made of nickel self-fluxing alloy powder, the second coating is made of a mixture of special alloy powder of SiC and Co fine carbides, and the third coating is made of a mixture of BN and CrN alloy powder.
The preparation method of the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises the following steps:
1) preparing a matrix: taking the raw materials according to a certain proportion, preparing a steel billet through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billet to obtain a matrix, wherein the heating temperature before hot rolling is 1250 ℃, the finish rolling temperature is 860 ℃, the cold rolling reduction rate is 65%, and the annealing temperature is 760 ℃;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, wherein the laser power is 2200W, the spraying distance is 90mm, the spraying speed is 270mm/s, and meanwhile, irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
Example 2:
a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are C0.11%, Al0.035%, Mn 0.39%, S0.01%, P0.019%, Si 0.06%, N0.001%, Als0.011% and Fe 99.18%, the composite coating is made of alloy powder, the composite coating is sequentially made of a first coating, a second coating and a third coating from inside to outside, the first coating is made of nickel self-fluxing alloy powder, the second coating is made of a mixture of SiC, ZrC and Co fine carbide special alloy powder, and the third coating is made of a mixture of micron-sized BN, CrN and TiC alloy powder.
The preparation method of the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises the following steps:
1) preparing a matrix: preparing steel billets by taking the raw materials according to a proportion through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billets to obtain a matrix, wherein the heating temperature before hot rolling is 1230 ℃, the finish rolling temperature is 850 ℃, the cold rolling reduction rate is 58% and the annealing temperature is 750 ℃;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, wherein the laser power is 2100W, the spraying distance is 95mm, the spraying speed is 290mm/s, and meanwhile, irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
Example 3:
a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are C0.15%, Al 0.08%, Mn 0.63%, S0.016%, P0.027%, Si 0.15%, N0.002%, Als 0.023% and Fe 98.69%, the composite coating is made of alloy powder, the composite coating is sequentially made of a first coating, a second coating and a third coating from inside to outside, the first coating is made of a mixture of iron self-fluxing alloy powder, aluminum self-fluxing alloy powder and nickel self-fluxing alloy powder, the second coating is made of a mixture of ZrC and Co superfine carbide special alloy powder, and the third coating is made of a mixture of micron-sized BN and CrN alloy powder.
The preparation method of the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises the following steps:
1) preparing a matrix: preparing steel billets by taking the raw materials according to a proportion through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billets to obtain a matrix, wherein the heating temperature before hot rolling is 1260 ℃, the finish rolling temperature is 870 ℃, the cold rolling reduction rate is 50%, and the annealing temperature is 780 ℃;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, wherein the laser power is 2200W, the spraying distance is 100mm, the spraying speed is 280mm/s, and meanwhile, irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
Example 4:
a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are C0.12%, Al 0.054%, Mn 0.43%, S0.012%, P0.012%, Si 0.06%, N0.003%, Als 0.036% and Fe 99.03%, the composite coating is made of alloy powder, the composite coating is sequentially made of a first coating, a second coating and a third coating from inside to outside, the first coating is made of iron self-fluxing alloy powder, the second coating is made of a mixture of special alloy powder containing ZrC and Co fine carbides, and the third coating is made of a mixture of micron-sized BN and CrN alloy powder.
The preparation method of the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises the following steps:
1) preparing a matrix: preparing steel billets by taking the raw materials according to a proportion through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billets to obtain a matrix, wherein the heating temperature before hot rolling is 1290 ℃, the finish rolling temperature is 890 ℃, the cold rolling reduction rate is 69%, and the annealing temperature is 770 ℃;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, wherein the laser power is 2300W, the spraying distance is 100mm, the spraying speed is 270mm/s, and meanwhile, irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
Example 5:
a high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are C0.14%, Al 0.071%, Mn 0.47%, S0.009%, P0.019%, Si 0.09%, N0.001%, Als 0.043% and Fe 98.72%, the composite coating is made of alloy powder, the composite coating is sequentially provided with a first coating, a second coating and a third coating from inside to outside, the first coating is made of a mixture of aluminum self-fluxing alloy powder and nickel self-fluxing alloy powder, the second coating is made of a mixture of SiC and ZrC alloy powder, and the third coating is made of a mixture of micron-sized BN, CrN and TiC alloy powder.
The preparation method of the high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller comprises the following steps:
1) preparing a matrix: preparing steel billets by taking the raw materials according to a proportion through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billets to obtain a matrix, wherein the heating temperature before hot rolling is 1240 ℃, the finish rolling temperature is 880 ℃, the cold rolling reduction rate is 70%, and the annealing temperature is 750 ℃;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, wherein the laser power is 2300W, the spraying distance is 90mm, the spraying speed is 290mm/s, and meanwhile, irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
Comparative example: the metallurgical roll is prepared by conventional techniques.
The metallurgical rolls prepared in examples 1 to 5 of the present invention and the metallurgical rolls prepared by the conventional technique were subjected to performance tests, and the results are shown in Table 1.
Table 1:
in summary, the embodiment of the invention has the following beneficial effects: the hardness of the base material, the hardness of the roller surface, the high-temperature wear resistance/oxidation resistance, the processing precision, the roughness, the steel passing amount and the service life of the metallurgical roller prepared in the embodiments 1 to 5 of the invention are far better than those of the metallurgical roller prepared by the traditional technology, and the invention has obvious progress.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. The high-temperature-resistant, oxidation-resistant and wear-resistant metallurgical roller is characterized by comprising a substrate and a composite coating, wherein the substrate is carbon structural steel, the mass percentages of elements in the carbon structural steel are C0.11-0.15%, Al 0.035-0.08%, Mn 0.32-0.63%, S0.008-0.016%, P0.012-0.027%, Si 0.06-0.15%, N0.001-0.003%, Als0.011-0.052%, and Fe 98.69-99.18%, the composite coating is prepared from alloy powder, the composite coating is prepared from coating one, coating two and coating three from inside to outside in sequence, the coating one raw material is one or a mixture of a plurality of iron self-fluxing alloy powder, aluminum self-fluxing alloy powder and nickel self-fluxing alloy powder, the coating two raw material is one or a mixture of a plurality of superfine carbide special alloy powder of ZrC, SiC and Co, the coating three raw materials are one or a mixture of a plurality of micron BN, CrN and TiC alloy powders, and the preparation method of the metallurgical roller comprises the following steps:
1) preparing a matrix: taking the raw materials according to a certain proportion, preparing a steel billet through steelmaking and casting, and sequentially carrying out hot rolling, cold rolling and annealing treatment on the steel billet to obtain a matrix;
2) spraying: roughening the surface of the substrate obtained in the step 1), spraying the composite coating raw material on the surface of the substrate prepared in the step 1) by adopting a plasma laser spraying technology, and irradiating the central point of a plasma jet by adopting a low-power laser beam;
3) laser secondary remelting: and 2) after the spraying is finished, increasing the emission power of a laser, carrying out laser secondary remelting on the substrate and the coating by using a high-energy density laser beam, and carrying out mechanical finish machining to obtain the metallurgical roller.
2. The refractory, antioxidant and wear-resistant metallurgical roll of claim 1, wherein the first coating layer is made of a nickel self-fluxing alloy powder, the second coating layer is made of a mixture of special alloy powders of SiC and Co fine carbides, and the third coating layer is made of a mixture of BN and CrN alloy powders.
3. The high temperature, oxidation and wear resistant metallurgical roll as claimed in claim 1, wherein in step 1), the heating temperature before hot rolling is 1230-1290 ℃, the finish rolling temperature is 850-890 ℃, the cold rolling reduction rate is 50-70%, and the annealing temperature is 750-780 ℃.
4. The refractory, antioxidant and antiwear metallurgical roll according to claim 1, wherein in step 2), the laser power is 2100W-2300W, the spraying distance is 90-100mm, and the spraying speed is 270-290mm/s during plasma laser spraying.
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| CN114226473B (en) * | 2021-11-30 | 2023-11-21 | 马鞍山市恒泰重工机械有限公司 | Novel wear-resistant superhard metallurgical variable frequency roller structure and manufacturing process of variable frequency roller |
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Denomination of invention: Metallurgical roll with high temperature resistance, oxidation resistance and wear resistance and its preparation method Effective date of registration: 20221226 Granted publication date: 20200522 Pledgee: Dangtu County sub branch of China Post Savings Bank Co.,Ltd. Pledgor: MAANSHAN HENGTAI HEAVY INDUSTRY MACHINERY CO.,LTD. Registration number: Y2022980028908 |
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