CN118910535B - Surface coating of plunger or shaft workpiece and preparation method and application thereof - Google Patents
Surface coating of plunger or shaft workpiece and preparation method and application thereof Download PDFInfo
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- CN118910535B CN118910535B CN202411414321.6A CN202411414321A CN118910535B CN 118910535 B CN118910535 B CN 118910535B CN 202411414321 A CN202411414321 A CN 202411414321A CN 118910535 B CN118910535 B CN 118910535B
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- 238000000576 coating method Methods 0.000 title claims abstract description 189
- 239000011248 coating agent Substances 0.000 title claims abstract description 188
- 238000002360 preparation method Methods 0.000 title abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 74
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 239000002184 metal Substances 0.000 claims abstract description 49
- 239000000758 substrate Substances 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004321 preservation Methods 0.000 claims abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 63
- 229910045601 alloy Inorganic materials 0.000 claims description 62
- 239000000956 alloy Substances 0.000 claims description 62
- 230000007704 transition Effects 0.000 claims description 38
- 230000035515 penetration Effects 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 35
- 239000000843 powder Substances 0.000 claims description 29
- 229910052759 nickel Inorganic materials 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 20
- 238000007750 plasma spraying Methods 0.000 claims description 18
- 239000003094 microcapsule Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 229910021389 graphene Inorganic materials 0.000 claims description 7
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000011162 core material Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 21
- 238000005260 corrosion Methods 0.000 abstract description 21
- 230000001934 delay Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 description 41
- 239000002245 particle Substances 0.000 description 20
- 239000011651 chromium Substances 0.000 description 13
- 239000007921 spray Substances 0.000 description 11
- 238000000498 ball milling Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
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- 230000000052 comparative effect Effects 0.000 description 3
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- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 3
- 238000010285 flame spraying Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- XJNCHICLWKVTQA-UHFFFAOYSA-N [Mo].[W].[Cr].[Ni] Chemical group [Mo].[W].[Cr].[Ni] XJNCHICLWKVTQA-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001493 electron microscopy Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 101150093826 par1 gene Proteins 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 101100406879 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) par-2 gene Proteins 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- 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
- C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
-
- 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
- C23C4/12—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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
本申请涉及机械设备技术领域，具体涉及一种柱塞或轴类工件的表面涂层及其制备方法和应用。所述制备方法包括如下步骤：将金属喷涂料喷涂到基体表面，再进行重熔处理和保温冷却处理后，得到表面涂层。所述制备方法提高所述表面涂层与所述基体之间的结合强度，防止所述表面涂层脱落，同时降低所述表面涂层的孔隙率，提高所述表面涂层的硬度和耐磨性，有效延缓点蚀扩散。所述表面涂层的维氏硬度HV为940～1300，洛氏硬度HRC为68～74。
The present application relates to the technical field of mechanical equipment, and specifically to a surface coating for a plunger or shaft workpiece, and a preparation method and application thereof. The preparation method comprises the following steps: spraying a metal spray coating onto the surface of a substrate, and then performing a remelting treatment and a heat preservation cooling treatment to obtain a surface coating. The preparation method improves the bonding strength between the surface coating and the substrate, prevents the surface coating from falling off, and at the same time reduces the porosity of the surface coating, improves the hardness and wear resistance of the surface coating, and effectively delays the spread of pitting corrosion. The Vickers hardness HV of the surface coating is 940 to 1300, and the Rockwell hardness HRC is 68 to 74.
Description
Technical Field
The application relates to the technical field of mechanical equipment, in particular to a surface coating of a plunger or shaft workpiece, and a preparation method and application thereof.
Background
The plunger usually works in corrosive fluid media, and because the fluid contains solid particles, the surface of the plunger needs to be sprayed with wear-resistant and corrosion-resistant materials so as to improve the wear resistance, hardness, corrosion resistance and other performances of the plunger.
At present, the main spraying process of spraying the material on the surface of the plunger comprises (1) an oxyacetylene spraying and welding process, (2) a supersonic flame spraying process and (3) a plasma flame spraying process. However, the spraying processes have the defects of low hardness of the coating, insufficient binding force between the coating and the plunger matrix and the like. For example, the oxyacetylene spray welding process of (1) adopts nickel-based alloy as the coating, firstly, the oxyacetylene is used for spraying the powder onto the substrate, and then remelting process is carried out, the coating and the substrate material are metallurgically bonded, the bonding strength is high, but the coating porosity is high, the coating hardness HRC is only 58-62, the coating is easily scratched and worn by hard particles in a medium, the coating fails, the service condition of a plunger cannot be met, the service life of the plunger is short, the replacement frequency of the plunger and a sealing element matched with the plunger is high, the working efficiency of the pump is reduced, the production and use cost is increased, and the supersonic flame spraying process of (2) sprays the tungsten carbide alloy powder onto the surface of the substrate material at high temperature and high speed, the bonding strength of the coating and the substrate is 70MPa, and the coating is easy to have failure problems such as pitting corrosion and falling off in the service condition of the plunger at high temperature, high pressure and high corrosion.
Disclosure of Invention
In order to solve the problems, the application provides a surface coating of a plunger or shaft workpiece, and a preparation method and application thereof. The hardness HRC of the surface coating is as high as 68-74, and the surface coating has a self-repairing function, so that the service life of the plunger or shaft workpiece is prolonged. The surface coating prepared by the preparation method has high bonding strength with the plunger or shaft matrix, is not easy to fall off even being used for a long time, and has excellent wear resistance and corrosion resistance.
The application is realized by the following technical scheme:
The application aims to provide a preparation method of a surface coating of a plunger or shaft workpiece, which comprises the following steps:
Spraying the metal spray coating on the surface of a substrate, and then carrying out remelting treatment and heat preservation cooling treatment to obtain a surface coating;
wherein the spraying comprises at least one of plasma spraying and supersonic spraying;
the matrix is at least one of a plunger matrix and a shaft workpiece matrix;
the metal spray coating comprises a raw material of a high-entropy alloy, wherein the raw material of the high-entropy alloy comprises 16.5-26% of Ni, 18-25% of Co, 20-28% of Cr, 16.5-25% of W, 16.5-22.5% of Mo, 0.1-3% of Cu, 0.1-3% of Si and 0.1-3% of B by mass percent;
in the remelting treatment step, the remelting temperature is 1000-1150 ℃.
In some possible implementations, the plasma spray has a flame flow speed of 300m/s to 400m/s.
In some possible implementations, the flame flow velocity of the supersonic spray is 1500m/s to 2000m/s.
In some possible implementations, the powder impact speed of the plasma spray is 150m/s to 300m/s.
In some possible implementations, the supersonic sprayed powder impact speed is 500m/s to 1100m/s.
In some possible implementations, the plasma spraying distance is 100 mm-150 mm.
In some possible implementations, the spray distance of the supersonic spraying is 300 mm-360 mm.
In some possible implementations, the metal spray coating further comprises at least one of a nanonickel-based alloy, a metal microcapsule.
In some possible implementations, in the metal microcapsule, the wall material is graphene, and the core material is nickel-based alloy.
The second purpose of the application is to provide a surface coating prepared by the preparation method of the surface coating of the plunger or shaft workpiece;
The thickness of the surface coating is 300-800 mu m.
In some possible implementations, the surface coating includes an integrally formed penetration transition layer and wear layer, the penetration transition layer being located between the substrate surface and the wear layer.
In some possible implementations, the penetration transition layer has a thickness of 20 μm to 100 μm.
It is a further object of the present application to provide a plunger comprising a plunger body and a coating attached to a surface of the plunger body, the coating comprising the surface coating provided by the present application.
The application aims at providing a preparation method of a surface coating of a plunger or shaft workpiece, and application of the surface coating or the plunger in the field of mechanical equipment.
The surface coating of the plunger or shaft workpiece and the preparation method thereof provided by the application have at least the following beneficial technical effects:
(1) The preparation method of the surface coating of the plunger or shaft workpiece comprises the steps of spraying to enable the metal spray coating and a matrix to form mechanical combination, remelting, wherein the metal spray coating is remelted into alloy on the surface of the matrix in situ and is mutually diffused with atoms between interfaces of the matrix, the metal spray coating and the matrix are metallurgically combined to obtain the surface coating, the combination strength between the surface coating and the matrix is improved, the surface coating is prevented from falling off, meanwhile, the porosity of the surface coating is reduced, the hardness and the wear resistance of the surface coating are improved, and the pitting corrosion diffusion is effectively delayed. After heat preservation, the surface coating can be effectively prevented from cracking by cooling;
(2) The Vickers hardness HV of the surface coating provided by the application is 940-1300, and the Rockwell hardness HRC is 68-74;
(3) The plunger provided by the application has high wear resistance due to the inclusion of the surface coating with high hardness and wear resistance.
Drawings
In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present drawings, and that other drawings may be obtained according to the structures shown in these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural view of a plunger according to an embodiment of the present application.
FIG. 2 is an electron microscope image of a coating sprayed on a surface of a plunger or shaft-type workpiece according to example 1 of the present application.
FIG. 3 is an electron microscopic image of the surface coating obtained after remelting treatment in the method for preparing the surface coating of the plunger or shaft-like workpiece in example 1 of the present application.
The reference numerals illustrate a 1-plunger matrix, a 2-coating, paR a pre-remelting coating, paR a wear-resistant layer, and a Pa 1-penetration transition layer.
The achievement of the objects, functional features and advantages of the present drawings will be further described with reference to the accompanying drawings in conjunction with the embodiments.
Detailed Description
The present application will be described and illustrated with reference to the following examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present application without making any inventive effort, are intended to fall within the scope of the present application.
It is apparent that the following descriptions are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations without undue burden. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.
However, unnecessary detailed description may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of the actual same structure may be omitted. This is to avoid that the following description becomes unnecessarily lengthy, facilitating the understanding of those skilled in the art. Furthermore, the following description is provided for a thorough understanding of the present application by those skilled in the art, and is not intended to limit the subject matter recited in the claims.
If not specifically stated, all the embodiments and optional embodiments of the present application may be combined with each other to form a new technical solution, and all the technical features and optional technical features of the present application may be combined with each other to form a new technical solution.
The high-pressure plunger pump has high failure rate (one or two months), short average failure-free operation time (less than 2000 hours) and short service life (about 500 hours). One of the main causes of failure of high pressure plunger pumps is that the plunger is subject to wear and corrosion on the plunger surface due to long-term operation and immersion in corrosive fluid media, thereby causing the plunger pump to fail. The effective way to improve the wear resistance and corrosion resistance of the surface of the plunger is to provide a coating on the surface, but the existing coating such as spraying tungsten carbide alloy coating has poor binding force with the matrix and poor wear resistance, and can not obviously prolong the service life of the plunger.
In order to improve the bonding strength, wear resistance and corrosion resistance of a coating of a plunger and a matrix and further remarkably prolong the service life of the plunger, the embodiment of the application provides a surface coating of a plunger or a shaft workpiece, and a preparation method and application thereof. The preparation method of the surface coating of the plunger or shaft workpiece obviously improves the bonding strength between the surface coating and the substrate, prevents the surface coating from falling off, reduces the porosity of the surface coating, improves the hardness and the wear resistance of the surface coating, and effectively delays pitting diffusion. The Vickers hardness HV of the surface coating is 940-1300, and the Rockwell hardness HRC is 68-74.
The following is a detailed description of a surface coating for a plunger or shaft-type workpiece, and methods of making and using the same in accordance with embodiments of the present application.
The first aspect of the embodiment of the application provides a preparation method of a surface coating of a plunger or shaft workpiece, which comprises the following steps:
S1, spraying a metal spray coating on the surface of a substrate, and then carrying out remelting treatment and heat preservation cooling treatment to obtain a surface coating;
Wherein the spraying comprises at least one of plasma spraying and supersonic spraying;
The matrix is at least one of a plunger matrix and a shaft workpiece matrix;
The metal spray coating comprises a raw material of a high-entropy alloy, wherein the raw material of the high-entropy alloy comprises 16.5-26% of Ni, 18-25% of Co, 20-28% of Cr, 16.5-25% of W, 16.5-22.5% of Mo, 0.1-3% of Cu, 0.1-3% of Si and 0.1-3% of B by mass percent;
In the remelting treatment step, the remelting temperature is 1000-1150 ℃.
The preparation method of the surface coating of the plunger or shaft workpiece comprises the steps of spraying to enable the metal spray coating to form mechanical combination with a matrix, remelting the metal spray coating to form an alloy on the surface of the matrix in situ, and diffusing atoms between interfaces of the metal spray coating and the matrix, wherein the metal spray coating and the matrix are metallurgically combined to obtain the surface coating, so that the combination strength between the surface coating and the matrix is improved, the surface coating is prevented from falling off, the porosity of the surface coating is reduced, the hardness and the wear resistance of the surface coating are improved, and the pitting corrosion diffusion is effectively delayed. In addition, the surface coating formed after remelting the raw materials of the high-entropy alloy has the advantages of high corrosion resistance, high-temperature strength, high hardness, high thermal stability, high-temperature mechanical property, high design freedom and the like. And after heat preservation, the surface coating can be effectively prevented from cracking by cooling.
In an embodiment, the high-entropy alloy comprises 16.5% -26% of Ni, 18% -25% of Co, 20% -28% of Cr, 16.5% -25% of W, 16.5% -22.5% of Mo, 0.1% -3% of Cu, 0.1% -3% of Si and 0.1% -3% of B, and the high-entropy alloy can be 18% of Ni, 19% of Co, 21% of Cr, 20% of W, 20% of Mo, 1.5% of Cu, 0.2% of Si and 0.3% of B,19% of Ni, 20% of Co, 20% of Cr, 20% of W, 19% of Mo, 1% of Cu, 0.5% of Si and 0.5% of B.
In an embodiment, in the remelting treatment step, the remelting temperature is 1000 ℃ to 1150 ℃, and may be a typical but non-limiting remelting temperature or a range between any two remelting temperatures, such as 1000 ℃, 1100 ℃, 1150 ℃. At the remelting temperature, a penetration transition layer can be formed between the surface coating and the matrix, and the bonding strength between the surface coating and the matrix is improved.
In some embodiments, in the step S1, the powder particle size of the raw material of the high-entropy alloy is 15 μm to 45 μm, and in an exemplary embodiment, the powder particle size may be a typical but non-limiting powder particle size or a range between any two powder particle sizes, such as 15 μm, 25 μm, 30 μm, 40 μm, 45 μm, etc. In this powder particle size range, the raw materials of the high-entropy alloy can rapidly absorb heat to form a molten or semi-molten state, and spray-coat the surface of the substrate to form a uniform preformed coating.
In some embodiments, in step S1 above, the metal spray coating further comprises at least one of a nanonickel base alloy, a metal microcapsule. In this case, the surface coating made of the metal spray coating has a self-repairing function, and the surface coating of the plunger or shaft workpiece can generate damages such as cracks after long-term working, and the nano nickel-based alloy and the metal microcapsule in the surface coating repair the damages by changing the self structure or releasing the repairing material.
In some embodiments, the nano-nickel base alloy has an average particle size of 10nm to 100nm, and in an exemplary embodiment, the average particle size may be, but is not limited to, a typical average particle size of 10nm, 30nm, 60nm, 100nm, or a range between any two average particle sizes. In this case, the nanonickel base alloy repairs damages such as cracks of the surface coating of the plunger or shaft-type workpiece by changing its own structure.
In some embodiments, the nano nickel-based alloy comprises, by mass, 18.5% -20% of W, 1% -5% of Cr, and the balance of Ni and unavoidable impurities. In this case, the melting point of the nano nickel-based alloy is that the self structure is changed to repair damages such as cracks of the surface coating of the plunger or shaft-based workpiece by the characteristics of the self volume effect and the surface effect. Illustratively, the mass fraction of W in the nanonickel-based alloy may be in the range of 18.5%, 19%, 19.5%, 20%, etc. typical but non-limiting mass fraction or between any two mass fractions, and the mass fraction of Cr may be in the range of 1%, 2%, 3%, 4%, 5%, etc. typical but non-limiting mass fraction or between any two mass fractions.
In other embodiments, the nano nickel-based alloy is nickel-chromium-tungsten-molybdenum alloy (Inconel 230), and the components (mass fraction) are 75% -76% of Ni, 12% -19% of Cr, 10% -13% of W, 1% -3% of Mo, and the balance of metal or nonmetal elements with mass fraction lower than 1%. In this case, the nickel-chromium-tungsten-molybdenum alloy has excellent high-temperature properties, corrosion resistance and mechanical properties.
In some specific embodiments, in the metal microcapsule, the wall material is graphene, the core material is nickel-based alloy, and the nickel-based alloy is provided in the embodiment of the application. In this case, after the graphene as a wall material is worn out, the metal microcapsules may release a repair material (nickel-based alloy) to repair the damage.
In some embodiments, the average particle size of the metal microcapsules is 200 μm to 300 μm, and in the exemplary case, may be a typical but non-limiting average particle size of 200 μm, 250 μm, 300 μm, or the like, or a range between any two average particle sizes.
In some embodiments, the thickness of the wall material in the metal microcapsules is 10 μm to 100 μm, and in exemplary embodiments, may be a typical but non-limiting thickness of 10 μm, 30 μm, 60 μm, 100 μm, etc., or a range between any two thicknesses. In this case, the metal microcapsules can always keep their structure undamaged when the preparation of the surface coating of the plunger or shaft-like workpiece is performed.
In some embodiments, preparing the metal microcapsule comprises the steps of:
And step 1, obtaining the powder proportion of the nickel-based alloy raw material (Ni, cr, W, mo).
And 2, ball milling the nickel-based alloy raw material in an inert atmosphere to obtain the nickel-based alloy.
And 3, coating the nickel-based alloy with graphene by adopting a chemical vapor deposition method to obtain the metal microcapsule.
In some specific embodiments, in the step 2, the grinding balls adopted by the ball milling are stainless steel balls, the sizes of the stainless steel balls are selected from big balls, middle balls and small balls, the number ratio of the big balls, the middle balls and the small balls is 1:20:100, the diameter D Big size of the big balls is 10mm < D Big size is less than or equal to 20mm, the diameter D In (a) of the middle balls is 5mm less than or equal to D In (a) is less than or equal to 10mm, and the diameter D Small size of the small balls is 0.5mm less than or equal to D Small size <5mm. In some embodiments, in the step 2, the rotational speed of the ball mill is 90r/min to 150r/min, and in an exemplary embodiment, the rotational speed may be typically but not limited to 90r/min, 100r/min, 120r/min, 150r/min, or any range between two rotational speeds. In some embodiments, in the step 2, the rotation direction is switched every 20min during the ball milling process, and the ball milling is stopped for 5min for 3-5 min each time to prevent the overheating of the ball mill and the agglomeration of the powder, and the ball milling time is 3-12 h. In some embodiments, in the step 2, the ball-milling ball-material ratio (ball-material mass ratio) is (1-20): 1. In some specific embodiments, in the step 2, absolute ethyl alcohol is added during ball milling to improve the ball milling effect, and the amount of absolute ethyl alcohol is determined according to the specific ball milling condition, and belongs to the conventional technology, and is not limited herein. Under the condition, the nickel-based alloy obtained by ball milling is uniform in alloying and fine in particle size, and the particle size of the prepared nickel-based alloy is 100-290 mu m.
In some embodiments, in the above step 3, the carbon source and the temperature may be adjusted according to the actual preparation process, without limitation. In an exemplary embodiment, the carbon source may be methane, ethylene, ethane, etc., and the pyrolysis temperature of the carbon source may be 900 ℃ to 1000 ℃.
In other embodiments, preparing the metal microcapsules comprises the steps of:
x1. mechanically crushing the nickel-base alloy, and screening nickel-base alloy powder with the particle size of 100-290 mu m.
X2. coating the nickel-based alloy with graphene by adopting a chemical vapor deposition method to obtain the metal microcapsule.
In some embodiments, in the above step X2, the carbon source and the temperature may be adjusted according to the actual preparation process, without limitation. In an exemplary embodiment, the carbon source may be methane, ethylene, ethane, etc., and the pyrolysis temperature of the carbon source may be 900 ℃ to 1000 ℃.
In some embodiments, the matrix is a plunger matrix or a shaft-like matrix.
In some embodiments, the substrate surface is pre-treated prior to preparing the surface coating on the substrate surface, the pre-treatment including substrate surface cleaning and grit blasting. In this case, the cleaning of the substrate can remove impurities such as organic matters on the surface of the substrate, and the sand blasting can roughen the surface of the substrate to assist in improving the bonding strength between the surface of the substrate and the surface coating. It should be noted that both surface cleaning and blasting are conventional in the art, and the materials and conditions of the treatment are not particularly limited in the examples of the present application. By way of example, the substrate surface may be cleaned by alcohol or ultrasonic cleaning, and blasted by a blaster to roughen the substrate surface and facilitate adhesion of the metal spray coating to the substrate.
In some embodiments, in the step S1, the substrate is preheated before spraying, where the preheating temperature is 80 ℃ to 90 ℃, and in an exemplary case, the preheating temperature may be 80 ℃, 85 ℃,90 ℃, or the like, which is typical but not limited, or a range between any two preheating temperatures. In this case, preheating the substrate may improve the mechanical bonding force of the metal spray coating to the substrate surface.
In some embodiments, in the step S1, the plasma spraying flame flow speed is 300m/S to 400m/S, and in an exemplary embodiment, the plasma spraying flame flow speed may be 300m/S, 350m/S, 400m/S, or the like, which is typical but not limited, or a range between any two flame flow speeds. In some embodiments, in the step S1, the flame flow speed of the supersonic spraying is 1500m/S to 2000m/S, and in an example, the flame flow speed may be 1500m/S, 1800m/S, 2000m/S, or the like, which is typical but not limited, or a range between any two flame flow speeds. Under the flame flow velocity, the metal spray coating is heated in flame to form a molten or semi-molten state, and is sprayed on the surface of a substrate to form a denser coating, so that the quality of the surface coating is improved.
In some embodiments, in the step S1, the powder striking speed of the plasma spraying is 150m/S to 300m/S, and in an example, the powder striking speed may be 150m/S, 200m/S, 300m/S, or the like, which is typical but not limited, or a range between any two powder striking speeds. In some embodiments, in the step S1, the powder striking speed of the supersonic spraying is 500m/S to 1100m/S, and in an example, the powder striking speed may be, but is not limited to, a typical powder striking speed of 500m/S, 800m/S, 1100m/S, or a range between any two powder striking speeds. At the powder impact speed, the energy of the metal spray paint is uniform in size and distribution when impacting the surface of the matrix, so that the bonding strength, compactness and wear resistance of the surface coating are improved.
In some embodiments, in the step S1, the plasma spraying distance is 100mm to 150mm, and in an exemplary embodiment, the plasma spraying distance may be a typical but non-limiting spraying distance or a range between any two spraying distances, such as 100mm, 130mm, 150mm, etc. In some embodiments, in the step S1, the spraying distance of the supersonic spraying is 300mm to 360mm, and in an exemplary example, the spraying distance may be 300mm, 330mm, 360mm, or the like, which is typical but not limited, or a range between any two spraying distances. At this spray distance, the degree of mechanical bonding of the coating to the substrate is high, thereby improving the quality of the surface coating.
In some embodiments, in the step S1, the coating is subjected to a secondary melting treatment by means of high-frequency melting or flame melting. In this case, the remelting treatment can realize metallurgical bonding between the substrate and the coating, and the surface hardness HRC of the coating reaches 68-74.
In some embodiments, in step S1 described above, the insulating and cooling treatment is performed using perlite. Under the condition, the perlite is subjected to heat preservation and cooling treatment, so that fine crystals of the alloy can be promoted, the wear resistance and corrosion resistance of the surface coating can be improved, and cracks of the surface coating can be effectively prevented.
In some embodiments, in the step S1, the melting point of the surface coating is 1050 ℃ to 1280 ℃, and in an exemplary embodiment, the melting point may be 1050 ℃, 1100 ℃, 1200 ℃, 1280 ℃, or the like, which is typical but not limited to the melting point or the range between any two melting points. In this case, the surface coating can still work normally in a high temperature environment, and has high wear resistance.
The second aspect of the embodiment of the application provides a surface coating prepared by the preparation method of the surface coating of the plunger or shaft workpiece;
The thickness of the surface coating is 300-800 μm.
The Vickers hardness HV of the surface coating provided by the application is 940-1300, the Rockwell hardness HRC is 68-74, and the melting point is 1050-1280 ℃.
In an exemplary embodiment, the thickness of the surface coating is 300 μm to 800 μm, and may be a typical but non-limiting thickness or a range between any two thicknesses, such as 300 μm, 400 μm, 636.4 μm, 800 μm, etc.
In some embodiments, referring to fig. 3, the surface coating includes an integrally formed penetration transition layer Pa1 and wear layer PaR2, the penetration transition layer Pa1 being located between the substrate and wear layer PaR. In this case, the penetration transition layer is a transition layer generated by metallurgical bonding between the surface coating and the substrate, so that the bonding strength between the substrate and the surface coating is improved, and the surface coating is prevented from falling off.
In some embodiments, the thickness of the penetration transition layer is 20 μm to 100 μm, and in exemplary embodiments, may be a typical but non-limiting thickness or a range between any two thicknesses of 20 μm, 48 μm, 80 μm, 100 μm, etc. In some embodiments, the wear layer may have a thickness of 200 μm to 780 μm, and in an exemplary embodiment, may have a typical but non-limiting thickness of 200 μm, 588 μm, 780 μm, etc., or a range between any two thicknesses. In this case, the metallurgical bond strength between the surface coating and the substrate is high and does not affect the properties of the substrate and the surface coating itself.
A third aspect of the present embodiment provides a plunger, as shown in fig. 1, comprising a plunger body 1 and a coating 2 attached to a surface of the plunger body, the coating comprising a surface coating provided by the present embodiment.
In the plunger piston provided by the embodiment of the application, in the environment of long-term abrasion and corrosion, the surface coating is required to be arranged, so that the plunger piston has very high abrasion resistance and corrosion resistance, and the service life of the plunger piston is prolonged. The plunger provided by the embodiment of the application has the advantages that the plunger has high wear resistance due to the inclusion of the surface coating with high hardness and wear resistance.
In some embodiments, the diameter of the plunger is 38 mm-120 mm, and in an exemplary embodiment, may be a typical but non-limiting diameter or a range between any two diameters, such as 38mm, 50mm, 80mm, 120mm, etc. It should be noted that the length of the plunger varies according to the practical application field, but the length of the plunger may be 300mm or 449.7mm, that is, the size of the plunger may be 300mm or 300mm, 120.65mm or 449.7mm, for example.
The fourth aspect of the embodiment of the application provides a shaft workpiece, which comprises a shaft workpiece substrate and a coating attached to the surface of the shaft workpiece substrate, wherein the coating comprises the surface coating provided by the embodiment of the application.
The shaft workpiece provided by the embodiment of the application needs to be provided with the surface coating in a long-term abrasion and corrosion environment, so that the shaft workpiece has very high abrasion resistance and corrosion resistance, and the service life of the shaft workpiece is prolonged. The shaft workpiece provided by the embodiment of the application has high hardness and wear resistance due to the inclusion of the surface coating provided by the embodiment of the application, so that the shaft workpiece has high wear resistance.
In some embodiments, the shaft-like workpiece has a diameter of 60mm to 115mm, and in an exemplary embodiment, may have a typical but non-limiting diameter or a range between any two diameters of 60mm, 90mm, 114.3mm, 115mm, etc. It should be noted that the lengths of the shaft workpieces are different according to the actual application fields, but the lengths of the shaft workpieces may be 400mm to 500mm, that is, the sizes of the shaft workpieces may be phi 114.3mm by 500mm, phi 60mm by 480 mm, and the like, as examples.
The fifth aspect of the embodiment of the application provides a preparation method of a surface coating of a plunger or a shaft workpiece, and application of the surface coating or the plunger in the field of mechanical equipment.
Further description will be provided below in connection with specific examples.
Example 1
The embodiment 1 provides a preparation method of a plunger surface coating, which takes a raw material of a high-entropy alloy as a metal spray coating, wherein the mass fraction of each material in the raw material of the high-entropy alloy is 18% Ni, 19% Co, 21% Cr, 20% W, 20% Mo, 1.5% Cu, 0.2% Si and 0.3% B, and the preparation method comprises the following steps:
(1) Selecting a plunger matrix with the size of phi 37.4mm, cleaning the surface of the plunger matrix by adopting alcohol or ultrasonic cleaning, and then adopting a sand blasting machine to sand the surface of the plunger matrix to roughen the surface of the matrix, wherein the sand blasting pressure is set at 0.6MPa, and the sand blasting time is 4min.
(2) The spraying comprises the steps of baking the raw materials of the high-entropy alloy for 90min at the temperature of 120 ℃, uniformly spraying the metal spray paint on the plunger matrix by adopting supersonic spraying after preheating the plunger matrix to 80 ℃, wherein the supersonic spraying is carried out under the conditions that the gun distance is set to 320mm (spraying distance), the oxygen is set to 1850SCHF, the kerosene is set to 5.8GPH, the Mach number is 7, the 4 inch gun barrel is used for spraying, the flame flow speed is 1700m/s, and the powder impact speed is 700m/s.
(3) And remelting, namely remelting the plunger matrix with the coating at 1100 ℃ by adopting a high-frequency remelting or flame remelting mode after spraying.
(4) And (5) after remelting, carrying out heat preservation and cooling to normal temperature in the perlite to obtain the surface coating of the plunger.
And grinding and polishing the surface coating subsequently to reach the required precision, and obtaining the plunger.
The embodiment also provides a surface coating of the plunger, which is prepared by the preparation method of the surface coating of the plunger, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 48 mu m, and the thickness of the wear-resistant layer is 588 mu m.
Example 2
Example 2 provides a method for preparing a plunger surface coating, the steps being substantially the same as those of example 1, except that:
the flame flow speed in the step (2) is 1500m/s, and the powder impact speed is 500m/s.
Example 3
Example 3 proposes a method for preparing a surface coating for plungers, the steps being substantially the same as in example 1, except that:
The flame flow speed in the step (2) is 2000m/s, and the powder impact speed is 900m/s.
Example 4
Example 4 proposes a method for preparing a surface coating for plungers, the steps being substantially the same as in example 1, except that:
the remelting temperature in the step (3) is 1000 ℃.
Example 5
Example 5 proposes a method for preparing a surface coating for plungers, the steps being substantially the same as in example 1, except that:
the remelting temperature in the step (3) is 1150 ℃.
Example 6
Example 6 presents a method for preparing a plunger surface coating, the steps being substantially the same as example 1, except that the mass fraction of each material in the raw material of the high-entropy alloy is 19% Ni, 20% Co, 20% Cr, 20% W, 19% Mo, 1% Cu, 0.5% Si and 0.5% B.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 50 mu m, and the thickness of the wear-resistant layer is 580 mu m.
Example 7
Example 7 presents a method for preparing a plunger surface coating, the steps being the same as example 1, except that the mass fraction of each material in the raw material of the high-entropy alloy is 18% Ni, 18% Co, 20% Cr, 17% W, 18% Mo, 3% Cu, 3% Si and 3% B.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 80 mu m, and the thickness of the wear-resistant layer is 600 mu m.
Example 8
Example 8 presents a method for preparing a plunger surface coating, the steps being the same as example 1, except that the mass fraction of each material in the raw material of the high-entropy alloy is 16.5% Ni, 23% Co, 25% Cr, 16.5% W, 16.5% Mo, 2% Cu, 0.4% Si and 0.1% B.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 25 mu m, and the thickness of the wear-resistant layer is 710 mu m.
Example 9
Example 9 provides a method for preparing a plunger surface coating, which has the same steps as example 1, except that the metal spray coating is the raw material of the high-entropy alloy of example 1 and the nano nickel-based alloy;
the nano nickel-base alloy comprises the following components by mass percent of W18.5%, cr 5%, and the balance of Ni and unavoidable impurities, wherein the average grain diameter of the nano nickel-base alloy is 60nm.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 73 mu m, and the thickness of the wear-resistant layer is 693 mu m.
Example 10
Example 10 provides a method for preparing a plunger surface coating, which is substantially the same as example 9, except that the nano nickel base alloy has an average particle size of 10nm.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 30 mu m, and the thickness of the wear-resistant layer is 571 mu m.
Example 11
Example 11 presents a method for preparing a plunger surface coating in substantially the same manner as in example 9, except that the nanonickel-based alloy has an average particle size of 50nm.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 78 mu m, and the thickness of the wear-resistant layer is 601 mu m.
Example 12
Example 12 provides a method for preparing a plunger surface coating, which is substantially the same as example 9, except that the nano nickel base alloy has an average particle size of 100nm.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 57 mu m, and the thickness of the wear-resistant layer is 621 mu m.
Example 13
Example 13 provides a method for preparing a plunger surface coating, which has the same steps as example 1, except that the metal spray coating is the raw material and metal microcapsule of the high-entropy alloy of example 1;
The metal microcapsule comprises a wall material of graphene, a core material of nickel-based alloy, and the nickel-based alloy comprises, by mass, 18.5% of W, 5% of Cr, and the balance of Ni and unavoidable impurities, wherein the average grain diameter of the nano nickel-based alloy is 60nm.
The embodiment also provides a plunger surface coating, which is prepared by the preparation method of the plunger surface coating, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 91 mu m, and the thickness of the wear-resistant layer is 753 mu m.
Example 14
Example 14 presents a method of preparing a plunger surface coating, the steps being substantially the same as in example 1, except that:
And (2) adopting plasma spraying, namely baking the raw material of the high-entropy alloy for 90min at the temperature of 120 ℃, and uniformly spraying the metal spray coating on the plunger matrix by adopting plasma spraying after preheating the plunger matrix to 100 ℃, wherein the plasma spraying condition is that the gun distance is set to 120mm (spraying distance), the current is set to 750A, the argon is set to 50L/min, the hydrogen is set to 1L/min, the flame flow speed is 400m/s and the powder impact speed is 240m/s.
The embodiment also provides a surface coating of the plunger, which is prepared by the preparation method of the surface coating of the plunger, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 40 mu m, and the thickness of the wear-resistant layer is 604 mu m.
Example 15
Example 15 provides a method for preparing a plunger surface coating, the steps being substantially the same as in example 1, except that:
And (2) adopting plasma spraying, namely baking the raw material of the high-entropy alloy for 90min at the temperature of 120 ℃, and uniformly spraying the metal spray coating on the plunger matrix by adopting plasma spraying after preheating the plunger matrix to 100 ℃, wherein the plasma spraying condition is that the gun distance is set to 140mm (spraying distance), the current is set to 720A, the argon is set to 45L/min, the hydrogen is set to 1L/min, the flame flow speed is 350m/s and the powder impact speed is 170m/s.
The embodiment also provides a surface coating of the plunger, which is prepared by the preparation method of the surface coating of the plunger, and comprises a penetration transition layer and a wear-resistant layer which are integrally formed, wherein the thickness of the penetration transition layer is 44 mu m, and the thickness of the wear-resistant layer is 590 mu m.
Comparative example 1
The comparative example 1 proposes a preparation method of a plunger surface coating, which takes tungsten carbide alloy as a metal spray coating, wherein the tungsten carbide alloy comprises the raw materials of 2 percent of graphite powder, 15 percent of chromium powder, 6 percent of nickel powder, 1.2 percent of manganese powder, 2.5 percent of molybdenum powder, 1.8 percent of boron powder, 1 percent of silicon powder, 4 percent of rare earth oxide powder, 8 percent of nickel-coated graphite powder and the balance of tungsten carbide powder; the method comprises the following steps:
And finally, obtaining a layer of plunger substrate with the thickness of 0.3 mm-2.5 mm and the hardness of 45-65 HRC on the surface of the plunger substrate.
In order to verify the advancement of the surface coating of the plunger or shaft workpiece and the preparation method thereof, provided by the embodiment of the application, a reciprocating module of a UMT high-temperature frictional wear testing machine is adopted to carry out sliding frictional wear test on the coating, the size of a frictional wear sample is 20 multiplied by 10 multiplied by 5mm, and a high-hardness silicon nitride ceramic ball with the diameter of phi 6.35mm is selected as a grinding pair. Before testing, the surface of the coating is repeatedly ground and polished by a 1.2 mu m diamond polishing machine until the surface gloss of the coating is reached, and the surface roughness of the polished coating is controlled within the range of 0.2-0.5 mu m (Ra), and the coating needs to be ultrasonically cleaned in acetone before and after abrasion. The frictional wear test parameters are shown below, the frictional environment is air/dry friction, the sliding load is 60N, the sliding time is 30min, the reciprocating frequency is 8.3Hz, the reciprocating stroke is 5mm, and the total sliding distance is 75m. The coatings prepared in examples and comparative examples were subjected to corrosion resistance tests according to GB/T10125-201, and the measured hardness was compared, and the test results are shown in Table 1 below. Taking example 1 as an example, the microstructure of the coating obtained by electron microscopy scanning of the coating obtained by spraying (before remelting) is shown in fig. 2, and the microstructure of the coating obtained by electron microscopy scanning of the surface coating obtained by remelting is shown in fig. 3.
TABLE 1
From Table 1 above and the accompanying figures 2-3 of the specification, at least the following conclusions can be drawn:
(1) As shown in Table 1, the wear rate of the surface coating of the plunger in the embodiment of the application is below 2%, the hardness HRC is above 68, and the corrosion rate is lower than 3.5%, i.e. the surface coating of the plunger in the embodiment of the application has excellent wear resistance, hardness and corrosion rate, and the service life of the plunger can be remarkably prolonged;
(2) As can be seen from the accompanying drawings 2 and 3 in the specification, in the preparation method of the surface coating of the plunger according to the embodiment of the application, the thickness of the coating PaR1 before remelting is 636.4 mu m, the surface coating comprises a wear-resistant layer PaR and a penetration transition layer Pa1 after remelting, the thicknesses of the wear-resistant layer PaR and the penetration transition layer Pa1 are respectively PaR mu m and 48.01 mu m, and obviously, the sum of PaR and Pa1 is larger than PaR1, which indicates that during remelting, the metal spray paint is metallurgically bonded with a matrix, and part of the metal spray paint is metallurgically bonded with the matrix of the plunger to form the penetration transition layer, so that the coating cannot fall off from the matrix, and the service life of the plunger is further prolonged.
The present application is not limited to the above embodiment. The above embodiments are merely examples, and embodiments having substantially the same configuration and the same effects as those of the technical idea within the scope of the present application are included in the technical scope of the present application. Further, various modifications that can be made to the embodiments and other modes of combining some of the constituent elements in the embodiments, which are conceivable to those skilled in the art, are also included in the scope of the present application within the scope not departing from the gist of the present application.
Claims (7)
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| CN111455306A (en) * | 2020-05-07 | 2020-07-28 | 超达阀门集团股份有限公司 | Manufacturing process of nickel-based tungsten carbide wear-resistant coating of metal hard sealing ball valve |
| CN113122841A (en) * | 2021-04-25 | 2021-07-16 | 中国海洋大学 | Corrosion-resistant and wear-resistant coating with gradient composite structure and preparation method thereof |
| CN117758191A (en) * | 2023-12-20 | 2024-03-26 | 泰尔重工股份有限公司 | Preparation method of thermal spraying coating on surface of extrusion core rod |
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| DE102014015474A1 (en) * | 2014-10-18 | 2016-04-21 | Daimler Ag | Coated brake disc and manufacturing process |
| CN114645237A (en) * | 2020-12-21 | 2022-06-21 | 武汉苏泊尔炊具有限公司 | Cooking utensil and preparation method thereof |
| CN115232502A (en) * | 2021-04-23 | 2022-10-25 | 中国石油化工股份有限公司 | Self-repairing microcapsule and preparation method and application thereof |
| EP4494784A1 (en) * | 2022-03-17 | 2025-01-22 | Proterial, Ltd. | Composite material, method for producing composite material, and mold |
| CN117004900A (en) * | 2023-08-25 | 2023-11-07 | 河北工业大学 | Preparation method of AlCoCrFeNi-SiC high-entropy alloy composite coating |
| CN117604428A (en) * | 2023-10-05 | 2024-02-27 | 南阳理工学院 | A corrosion-resistant high-entropy alloy cladding additive manufacturing sinking roller and its production method |
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| CN111455306A (en) * | 2020-05-07 | 2020-07-28 | 超达阀门集团股份有限公司 | Manufacturing process of nickel-based tungsten carbide wear-resistant coating of metal hard sealing ball valve |
| CN113122841A (en) * | 2021-04-25 | 2021-07-16 | 中国海洋大学 | Corrosion-resistant and wear-resistant coating with gradient composite structure and preparation method thereof |
| CN117758191A (en) * | 2023-12-20 | 2024-03-26 | 泰尔重工股份有限公司 | Preparation method of thermal spraying coating on surface of extrusion core rod |
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