CN117626162A - Surface supersonic flame spraying method for effectively prolonging service life of lithium battery pole piece roller - Google Patents
Surface supersonic flame spraying method for effectively prolonging service life of lithium battery pole piece roller Download PDFInfo
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- CN117626162A CN117626162A CN202311614180.8A CN202311614180A CN117626162A CN 117626162 A CN117626162 A CN 117626162A CN 202311614180 A CN202311614180 A CN 202311614180A CN 117626162 A CN117626162 A CN 117626162A
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- pole piece
- roller
- spraying
- coating
- piece roller
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- 238000000034 method Methods 0.000 title claims abstract description 29
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 24
- 238000010285 flame spraying Methods 0.000 title claims description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 52
- 238000000576 coating method Methods 0.000 claims abstract description 52
- 238000005507 spraying Methods 0.000 claims abstract description 46
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims description 27
- 238000005488 sandblasting Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 7
- 239000003350 kerosene Substances 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 7
- 230000003746 surface roughness Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 229910006501 ZrSiO Inorganic materials 0.000 claims description 5
- 150000004703 alkoxides Chemical class 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000013077 target material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims description 2
- 239000012159 carrier gas Substances 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 235000019441 ethanol Nutrition 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims description 2
- 239000012466 permeate Substances 0.000 claims description 2
- 239000008213 purified water Substances 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- 230000001680 brushing effect Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005240 physical vapour deposition Methods 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 239000011651 chromium Substances 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 238000005524 ceramic coating Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007888 film coating Substances 0.000 description 3
- 238000009501 film coating Methods 0.000 description 3
- 238000007761 roller coating Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Classifications
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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
-
- 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
- B21B27/021—Rolls for sheets or strips
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0635—Carbides
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/341—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one carbide layer
-
- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate 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
- C23C4/18—After-treatment
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Inorganic Chemistry (AREA)
- Geometry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to the technical field of metal surface treatment, in particular to a method for effectively improving the pole piece roller of a lithium batteryUltrasonic spray coating WC-10Co-4Cr or WC-20Cr on pole piece roller 3 C 2 The 7Ni coating, the spray material is sent into high-speed jet flow to be heated and accelerated to be sprayed on the surface of the pretreated substrate to form a coating, and the Physical Vapor Deposition (PVD) technology is further adopted to improve the wear resistance of the coating, because the supersonic flame speed is very high but the temperature is relatively low, the decomposition of WC in the spraying process can be effectively inhibited, the coating has high bonding strength, is compact and excellent in wear resistance, and the wear resistance greatly exceeds that of a plasma spray coating and also exceeds that of an electroplated hard chromium layer, so that the application is extremely wide.
Description
Technical Field
The invention relates to the technical field of metal surface treatment, in particular to a surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller.
Background
The rolling technology of the battery pole piece is firstly derived from rolling of steel and nonferrous metals, the technology is firstly applied to the production of the battery pole piece in the nineties of the last century, and the technology is firstly applied to the production of the battery pole piece in japan and the united states, so that the battery pole piece is manufactured from the process of flat plate pressing to the current continuous rolling, and the production efficiency and consistency of the pole piece are greatly improved. In production, the pole piece rolling equipment is a carrier for realizing the pole piece rolling technology, and the quality of the pole piece rolling equipment directly influences the compaction density, the capacity and the like of the pole piece of the lithium ion battery. In the operation principle, the roll forming of the lithium ion battery pole piece belongs to the metal calendaring manufacturing category, the pole piece roll press mainly comprises two high-hardness press rolls which rotate in opposite directions and synchronously, the motor drives the rolls to rotate, the pole piece after coating and drying is fed from a feeding tray, the pole piece is changed into a compact state from an original tent-loose state under the action of a gap and pressure between the two rolls, and the compactness is obviously improved to meet the technological requirements. The key indexes such as capacity, consistency and the like of the lithium ion battery are directly affected by the factors such as the rolling density of the pole piece, the water content of the pole piece, the internal stress of the pole piece and the like. The proper compaction density can increase the discharge capacity of the battery, reduce the internal resistance, reduce the polarization loss, prolong the cycle life of the battery and greatly improve the production efficiency and consistency of the pole pieces. Therefore, the pole piece rolling equipment is an important equipment in the production of lithium ion batteries, and the performance of the pole piece rolling equipment directly determines a series of indexes of the lithium ion batteries. In the pole piece rolling equipment, the roller is a tool for rolling the rolled piece, and is a key component for realizing pole piece rolling forming, so that the roller is a core component for pole piece production.
The battery pole piece is prepared by coating compound slurry on a base material such as aluminum foil or copper foil, and rolling the pole piece is prepared by compacting slurry particles on a pole plate, so that the compacting density of the battery pole piece is increased, the discharge capacity of the battery can be increased due to the proper compacting density, the internal resistance is reduced, and the cycle life of the battery is prolonged.
Because the roller contacts with the pole piece, impurities on the pole piece adhere to the surface of the roller to form abrasive particle abrasion, and the surface of the roller is worn out and loses efficacy after long-time rolling. Meanwhile, the pole piece roller has corrosion failure, and as the pole piece of the lithium battery contains acidic substances, the roller contacts with the pole piece and can generate corrosion.
At present, a chromium plating roller is mainly used, but the chromium plating roller is required to be reconditioned for manufacturing the pole piece with 60-90 m, and the service life is short.
In view of the above drawbacks, the present inventors have finally achieved the present invention through long-time studies and practices.
Disclosure of Invention
The invention aims to solve the problems of abrasion and corrosion failure generated on the surface of the existing lithium battery pole piece roller and short service life, and provides a surface supersonic flame spraying method for effectively prolonging the service life of the lithium battery pole piece roller.
In order to achieve the above purpose, the invention discloses a surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller, which comprises the following steps:
s1, grinding before spraying, wherein the roughness Ra of the roll surface is less than or equal to 0.8 mu m, the runout of the roll surface is less than or equal to 0.001mm, and the cylindricity of the roll surface is less than or equal to 0.001mm; the roller surface has no shrinkage cavity, air hole, sand hole, crack defect, vibration grain, lead mark, scratch and fly foot grinding defect;
s2, cleaning, namely cleaning the roller surface by using absolute ethyl alcohol to remove oil stains on the surface;
s3, performing sand blasting roughening, namely preheating the surface of the pole piece roller to 80-120 ℃ before sand blasting, performing sand blasting by using an automatic sand blasting machine, performing sand blasting by using 30-60# white corundum sand, wherein the sand blasting pressure is 0.3-0.4MPa, the sand blasting distance is 250-400mm, the linear speed of the surface of the pole piece roller is 200-400mm, the sand blasting step distance is 5-15mm/pitch, and the surface roughness after sand blasting is controlled to be Ra5.0-8.0;
s4, supersonic flame spraying: spraying a tungsten carbide coating on the surface of a roller of a lithium battery pole piece roller machine by adopting supersonic flame equipment, wherein the thickness of the coating is 250-280 mu m;
s5, hole sealing treatment;
s6, coating grinding
S7, PVD surface hardening treatment.
The specific process of the supersonic flame spraying in the step S4 is as follows: fixing the pretreated pole piece roller on a rotary table, starting the rotary table, checking the roller surface, cleaning floating sand on the roller surface by using a cutter, and re-working and re-blasting if dirty and sticky matters exist on the roller surface; spraying by adopting a supersonic flame gun 5220, wherein the gun uses oxygen as a combustion improver and aviation kerosene as fuel; checking whether media such as kerosene, power media, water-cooling units, dust collectors and the like and facilities are normal or not; preheating the surface of the pole piece roller to 80-120 ℃ before spraying, and selecting a spraying material of WC-10Co-4Cr or WC-20Cr 3 C 2 7Ni powder, wherein the rotation speed is determined according to the size of the roller diameter of the pole piece roller, the movement speed of a manipulator of the spraying equipment is controlled, and the pole piece roller rotates for 5mm by one circle of manipulator; and (3) spraying immediately, continuing idling and slow cooling of the workpiece after the spraying is finished, controlling the temperature of the pole piece roller to be less than or equal to 150 ℃, and spraying.
The spraying process parameters are as follows: the oxygen flow is 1800-1950 SCFH, the kerosene flow is 5.5-6.5 GPH, the powder feeding speed is 50-70 g/min, the carrier gas flow is 22-24 SCFH, the spraying distance is 350-380 mm, the linear speed of the surface of the pole piece roller is 500-1000 mm/sec, the spraying step distance is 4.0-6.0 mm/pitch, the number of spraying passes is 16-20, the machine is stopped for checking after each 2-3 spraying passes are completed, and the next spraying is carried out after 5min of the intermittent operation.
In the step S5, zrSiO is used 4 Alcohol salt is used as hole sealing agent, PEG200, purified water, zirconium silicate and ethanol are prepared and mixed uniformly according to a certain proportion, and the hole sealing agent is sealed by using a brush coating methodThe pore agent is uniformly and thinly coated on the surface of the thermal spraying coating, and fully permeates into the pores of the coating, and the pole piece roller after hole sealing is naturally dried for 12-24 hours.
And step S6, grinding the spray coating by using a diamond grinding wheel, wherein the roughness Ra of the roll surface is less than or equal to 0.2 mu m, the runout of the roll surface is less than or equal to 0.001mm, the cylindricity of the roll surface is less than or equal to 0.001mm, the roll surface has no grinding defects such as vibration lines, lead marks, scratches, fly feet and the like, and the thickness of the roll surface coating is more than or equal to 150 mu m.
The specific process of PVD surface hardening treatment in step S7 is as follows: and (3) cleaning the surface of the coating subjected to grinding treatment to remove greasy dirt on the surface, adopting a WC target material with the purity of more than 99%, plating the film for 3-10 h, and plating a WC hard film with the thickness of 3-10 mu m on the roller surface.
The WC-10Co-4Cr or WC-20Cr 3 C 2 The particle size of the-7 Ni powder is 15-45 μm.
The WC-10Co-4Cr powder comprises the following components in percentage by weight: co 8.5-11.0, C:5.0 to 6.0, cr:3.0 to 5.0, fe:0 to 0.3, O:0 to 0.2, and the balance of W.
The WC-20Cr 3 C 2 The-7 Ni powder comprises the following components in percentage by weight: ni is 6.0-8.0, C:6.0 to 8.0, cr:16.0 to 19.0, fe:0 to 0.3, O:0 to 0.2, and the balance of W.
Compared with the prior art, the invention has the beneficial effects that: the pole piece roller of the invention is spray coated with WC-10Co-4Cr or WC-20Cr with supersonic speed 3 C 2 -7Ni coating to improve wear and corrosion resistance of the pole piece roller.
The supersonic flame spraying HVOF is a method in which combustion-supporting gas and kerosene are continuously combusted in a combustion chamber, high pressure is generated in the combustion chamber by flame of combustion and high-speed flame flow is generated through an expansion nozzle connected with an outlet of the combustion chamber, and spraying material is sent into the high-speed jet flow to be heated and accelerated to be sprayed on the surface of a pretreated substrate to form a coating. The supersonic flame speed is very high, but the temperature is relatively low, so that the decomposition of WC in the spraying process can be effectively inhibited, the coating has high bonding strength, is compact and excellent in wear resistance, and has the wear resistance greatly exceeding that of a plasma spraying layer and that of an electroplated hard chromium layer, so that the application is extremely wide;
when HVOF sprays WC-based coating, XRD of the coating after spraying shows that the main phase in the coating is still WC, the decomposition and oxidation of WC particles are less, meanwhile, the binding phase is beneficial to the combination of particles in the coating, and the defect of toughness of the coating is supplemented, so that the coating has high hardness and good toughness, and benefits are provided for the abrasion resistance of the coating; the pore sealing treatment after coating spraying further fills the pores in the coating, so that the porosity is greatly reduced (reduced to less than or equal to 0.5), and good guarantee is provided for preventing corrosive medium from entering the corrosive workpiece through the coating holes. The coating prepared by the method has high hardness and wear resistance, can be well suitable for the operation of a roller of a lithium battery pole piece roller machine under working conditions, provides good protection for the surface of the pole piece roller, prolongs the service life, and has the service life which is 2-3 times that of an electroplated layer.
By plating the WC film on the surface of the WC metal ceramic coating, the binding force between the coating and the coating layer is increased due to the fact that the WC film is homogeneous with WC in the WC metal ceramic coating, the porosity of the WC film is close to 0, the hardness of the WC film is far higher than that of the WC metal ceramic coating, and therefore the WC film not only further plays a role in sealing the WC metal ceramic coating, but also can increase the surface hardness and wear resistance of the WC metal ceramic coating, and therefore the purpose of further prolonging the service life of the coating is achieved. The reason why the coating film is not directly coated on the roller surface is that: the film coating layer is thinner, the difference between the hardness of the film coating layer and the roller body is too large, the binding force of the film coating layer and the roller body is limited, the film tends to be rapidly invalid due to micro deformation and cracking of the roller body, film falling and other reasons in the actual service process, and the strengthening effect is not obvious; adding WC-10Co-4Cr or WC-20Cr into the coating 3 C 2 After the 7Ni intermediate layer, the effect of hardness transition is achieved, and meanwhile, the binding force between the film and the coating (and the matrix) is increased, so that the effect of the coating layer can be exerted to the greatest extent. Increase WC-10Co-4Cr or WC-20Cr 3 C 2 Another purpose of the 7Ni intermediate coating is WC-10Co-4Cr or WC-20Cr 3 C 2 The 7Ni coating has high hardness and wear resistance, and can provide good wear resistance and corrosion resistance for the roller body after the WC coating layer is worn, thereby avoiding the excessive influence on the product quality.
Detailed Description
The foregoing and additional features and advantages of the invention are described in more detail below in conjunction with the following description.
Example 1
The diameter of a pole piece roller of the lithium battery pole piece roller machine is 800mm, the length of a roller surface is 950mm, the roller is prepared by forging 9Cr3Mo, the quenching hardness of the roller body is not less than HRC67, and after the roller body is subjected to grinding and sand blasting, WC-10Co-4Cr is sprayed by supersonic flame spraying equipment (HVOF). The spraying parameters are shown in Table 1, the coating detection results are shown in Table 2, and ZrSiO is used after spraying 4 Hole sealing treatment of alkoxide and natural solidification; the diamond grinding wheel is used for grinding the coating, the thickness of the final pole piece roller coating is 0.175mm, the surface roughness reaches Ra0.15 mu m, and the roller surface runout is less than or equal to 0.001mm. After the machine is used for 4 months, the machine is taken off the line for polishing, so that the service time of one-time machine-on is greatly prolonged, and the intermediate downtime is reduced.
Example 2
The diameter of a pole piece roller of a lithium battery pole piece roller machine is 750mm, the length of a roller surface is 850mm, the roller is prepared by forging 9Cr3Mo, the quenching hardness of a roller body is HRC 67-68, after being subjected to grinding and sand blasting, WC-20Cr is sprayed by adopting supersonic flame spraying equipment (HVOF) 3 C 2 -7Ni. The spraying parameters are shown in Table 1, the coating detection results are shown in Table 2, and ZrSiO is used after spraying 4 Hole sealing treatment of alkoxide and natural solidification; the diamond grinding wheel is used for grinding the coating, the thickness of the final pole piece roller coating is 0.168mm, the surface roughness reaches Ra0.12 mu m, and the roller surface runout is less than or equal to 0.001mm. After the machine is used for 4 months, the machine is taken off the line for polishing, so that the service time of one-time machine-on is greatly prolonged, and the intermediate downtime is reduced.
Example 3
The diameter of a pole piece roller of the lithium battery pole piece roller machine is 850mm, the length of a roller surface is 850mm, the roller is prepared by forging 9Cr3Mo, the quenching hardness of the roller body is HRC 66-68, after grinding and sand blasting are carried out regularly, WC-10Co-4Cr is sprayed by supersonic flame spraying equipment (HVOF). The spraying parameters are shown in Table 1, the coating detection results are shown in Table 2, and ZrSiO is used after spraying 4 Hole sealing treatment of alkoxide and natural solidification; the diamond grinding wheel is used for grinding the coating, the thickness of the final pole piece roller coating is 0.168mm, the surface roughness reaches Ra0.12 mu m, and the roller surface runout is less than or equal to 0.001mm. 5 machines are used for the upper machineAfter the month, the machine is subjected to offline grinding, so that the service time of one-time machine loading is greatly prolonged, and the intermediate downtime is reduced.
Example 4
The diameter of a pole piece roller of the lithium battery pole piece roller machine is 850mm, the length of a roller surface is 850mm, the roller is prepared by forging 9Cr3Mo, the quenching hardness of the roller body is HRC 66-68, after grinding and sand blasting are carried out regularly, WC-10Co-4Cr is sprayed by supersonic flame spraying equipment (HVOF). The spraying parameters are shown in Table 1, the coating detection results are shown in Table 2, and ZrSiO is used after spraying 4 Hole sealing treatment of alkoxide and natural solidification; grinding the coating by using a diamond grinding wheel, wherein the thickness of the coating of the final pole piece roller is 0.168mm, the surface roughness reaches Ra0.12 mu m, the runout of the roller surface is less than or equal to 0.001mm, after degreasing and cleaning, loading the mirror bright roller into a PVD vacuum coating machine, coating a film by adopting a WC target material with the purity of 99.99% for 5 hours, and discharging after cooling along with a furnace. After the machine is used for 8 months, the machine is taken off, polished and re-coated, and the service time of the machine is further greatly prolonged.
Table 1 example process parameters
Table 2 test results
The foregoing description of the preferred embodiment of the invention is merely illustrative of the invention and is not intended to be limiting. It will be appreciated by persons skilled in the art that many variations, modifications, and even equivalents may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The surface supersonic flame spraying method for effectively prolonging the service life of the lithium battery pole piece roller is characterized by comprising the following steps of:
s1, grinding before spraying, wherein the roughness Ra of the roll surface is less than or equal to 0.8 mu m, the runout of the roll surface is less than or equal to 0.001mm, and the cylindricity of the roll surface is less than or equal to 0.001mm; the roller surface has no shrinkage cavity, air hole, sand hole, crack defect, vibration grain, lead mark, scratch and fly foot grinding defect;
s2, cleaning, namely cleaning the roller surface by using absolute ethyl alcohol to remove oil stains on the surface;
s3, performing sand blasting roughening, namely preheating the surface of the pole piece roller to 80-120 ℃ before sand blasting, performing sand blasting by using an automatic sand blasting machine, performing sand blasting by using 30-60# white corundum sand, wherein the sand blasting pressure is 0.3-0.4MPa, the sand blasting distance is 250-400mm, the linear speed of the surface of the pole piece roller is 200-400mm, the sand blasting step distance is 5-15mm/pitch, and the surface roughness after sand blasting is controlled to be Ra5.0-8.0;
s4, supersonic flame spraying: spraying a tungsten carbide coating on the surface of a roller of a lithium battery pole piece roller machine by adopting supersonic flame equipment, wherein the thickness of the coating is 250-280 mu m;
s5, hole sealing treatment;
s6, grinding the coating;
s7, PVD surface hardening treatment.
2. The surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller according to claim 1, wherein the specific process of supersonic flame spraying in the step S4 is as follows: fixing the pretreated pole piece roller on a rotary table, starting the rotary table, checking the roller surface, cleaning floating sand on the roller surface by using a cutter, and re-working and re-blasting if dirty and sticky matters exist on the roller surface; spraying by adopting a supersonic flame gun 5220, wherein the gun uses oxygen as a combustion improver and aviation kerosene as fuel; checking whether media such as kerosene, power media, water-cooling units, dust collectors and the like and facilities are normal or not; preheating the surface of the pole piece roller to 80-120 ℃ before spraying, and selecting a spraying material of WC-10Co-4Cr or WC-20Cr 3 C 2 7Ni powder, wherein the rotation speed is determined according to the size of the roller diameter of the pole piece roller, the movement speed of a manipulator of the spraying equipment is controlled, and the pole piece roller rotates for 5mm by one circle of manipulator; immediately spraying, continuously idling and slowly cooling the workpiece after the spraying is finished, and controlling the temperature of the pole piece roller to be less than or equal to 1Spraying at 50 ℃.
3. The surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller according to claim 2, wherein the spraying process parameters are as follows: the oxygen flow is 1800-1950 SCFH, the kerosene flow is 5.5-6.5 GPH, the powder feeding speed is 50-70 g/min, the carrier gas flow is 22-24 SCFH, the spraying distance is 350-380 mm, the linear speed of the surface of the pole piece roller is 500-1000 mm/sec, the spraying step distance is 4.0-6.0 mm/pitch, the number of spraying passes is 16-20, the machine is stopped for checking after each 2-3 spraying passes are completed, and the next spraying is carried out after 5min of the intermittent operation.
4. The method for surface supersonic flame spraying effective in improving service life of lithium battery pole piece roller as recited in claim 1, wherein ZrSiO is used in said step S5 4 The alkoxide is used as a hole sealing agent, PEG200, purified water, zirconium silicate and ethanol are prepared and mixed uniformly according to a certain proportion, the hole sealing agent is coated on the surface of the thermal spraying coating uniformly and thinly by using a brushing method, the hole sealing agent fully permeates into the pores of the coating, and the pole piece roller after hole sealing is naturally dried for 12-24 hours.
5. The surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller according to claim 1, wherein in the step S6, a diamond grinding wheel is used for grinding a spray coating, the roller surface roughness Ra is less than or equal to 0.2 mu m, the roller surface runout is less than or equal to 0.001mm, the roller surface cylindricity is less than or equal to 0.001mm, and the roller surface has no grinding defects such as vibration lines, lead marks, scratches, fly feet and the like, and the roller surface coating thickness is more than or equal to 150 mu m.
6. The surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller according to claim 2, wherein the specific process of the PVD surface hardening treatment in the step S7 is as follows: and (3) cleaning the surface of the coating subjected to grinding treatment to remove greasy dirt on the surface, adopting a WC target material with the purity of more than 99%, plating the film for 3-10 h, and plating a WC hard film with the thickness of 3-10 mu m on the roller surface.
7. The surface supersonic flame spraying method for effectively prolonging service life of pole piece roller of lithium battery as claimed in claim 2, wherein the WC-10Co-4Cr or WC-20Cr is characterized in that 3 C 2 The particle size of the-7 Ni powder is 15-45 μm.
8. The surface supersonic flame spraying method for effectively prolonging the service life of a lithium battery pole piece roller according to claim 2, wherein the WC-10Co-4Cr powder comprises the following components in percentage by weight: co 8.5-11.0, C:5.0 to 6.0, cr:3.0 to 5.0, fe:0 to 0.3, O:0 to 0.2, and the balance of W.
9. The surface supersonic flame spraying method for effectively prolonging service life of pole piece roller of lithium battery as claimed in claim 2, wherein the WC-20Cr is as follows 3 C 2 The-7 Ni powder comprises the following components in percentage by weight: ni is 6.0-8.0, C:6.0 to 8.0, cr:16.0 to 19.0, fe:0 to 0.3, O:0 to 0.2, and the balance of W.
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