CN113881913A - Process method for spraying high-hardness wear-resistant coating by composite supersonic flame - Google Patents
Process method for spraying high-hardness wear-resistant coating by composite supersonic flame Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 92
- 239000011248 coating agent Substances 0.000 title claims abstract description 86
- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000005507 spraying Methods 0.000 title claims abstract description 41
- 230000006698 induction Effects 0.000 claims abstract description 43
- 238000010285 flame spraying Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000005488 sandblasting Methods 0.000 claims abstract description 23
- 230000007547 defect Effects 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 40
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 28
- 229910045601 alloy Inorganic materials 0.000 claims description 27
- 239000000956 alloy Substances 0.000 claims description 27
- 239000000919 ceramic Substances 0.000 claims description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 239000010431 corundum Substances 0.000 claims description 5
- 230000002950 deficient Effects 0.000 claims description 5
- 239000001294 propane Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 2
- 239000000758 substrate Substances 0.000 claims 1
- 230000003746 surface roughness Effects 0.000 abstract description 18
- 238000002360 preparation method Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 229910000856 hastalloy Inorganic materials 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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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
- C23C4/129—Flame spraying
-
- 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
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- 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
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only 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
- 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
-
- 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
-
- 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
Abstract
The invention belongs to the field of composite supersonic flame spraying application, and relates to a process method for spraying a high-hardness wear-resistant coating by using composite supersonic flame, which mainly aims to prepare various high-hardness wear-resistant coatings by using supersonic flame spraying, reduce the surface roughness of the coating by using composite induction heating and effectively improve the density of the coating, thereby realizing the preparation of a compact and uniform high-hardness wear-resistant coating. Firstly, oil stains and defects on the surface of a part to be sprayed are removed, the interface of the coating is cleaned through sand blasting, the roughness of the interface is improved, then a multi-performance coating is prepared on the surface of the part by selecting supersonic flame spraying equipment according to the actual application requirement, and finally induction remelting is carried out on the coating by utilizing induction heating, so that the purposes of improving the uniformity and compactness of the coating, reducing the surface roughness and improving the wear resistance are achieved.
Description
Technical Field
The invention belongs to the field of composite supersonic flame spraying application, and relates to a process method for spraying a high-hardness wear-resistant coating by using composite supersonic flame.
Background
Supersonic flame spraying (HVOF for short) is a novel thermal spraying technology developed on the basis of common flame spraying in the early 80 th century. It uses hydrogen, acetylene, propylene, kerosene, etc. as fuel, uses oxygen as combustion adjuvant, and makes them burn in combustion chamber or special nozzle to produce supersonic combustion flame whose temperature is up to 2000-3000 deg.C and speed is above 2100m/s, at the same time the powder is fed into the flame, so that the molten or semi-molten particles can be deposited on the surface of base body at high speed to form coating layer.
HC-276(Hastelloy C-276) Hastelloy is a nickel-chromium-molybdenum alloy, and has the characteristics of high temperature resistance, corrosion resistance and the like. The alloy has excellent corrosion resistance to most corrosive media in both the oxidized and reduced states. Excellent resistance to pitting corrosion, crevice corrosion and stress corrosion cracking. The alloy is suitable for various chemical process industries containing oxidizing and reducing media. The higher content of molybdenum and chromium makes the alloy resistant to corrosion of chloride ions, and the tungsten element further improves the corrosion resistance of the alloy. HC-276 is one of the only materials that can resist the corrosion of humid chlorine, hypochlorite, and chlorine dioxide solutions, and the alloy has significant corrosion resistance to high-concentration chloride solutions.
Although the supersonic flame spraying has high bonding strength, the bonding mode is mainly mechanical bonding, and the compactness of the coating is influenced by the existence of pores inside the coating, so that the uniformity of the performance of the coating is poor, and the coating is easy to locally peel off or locally corrode, so that the modification effect of the coating fails. Therefore, the invention considers remelting the coating by induction heating, further improves the density of the coating, and reduces the surface roughness and the porosity of the coating, thereby improving the wear resistance of the coating.
Disclosure of Invention
In order to improve the service performance of HC-276 material and prolong the service life, the invention aims to provide a process method for spraying a high-hardness wear-resistant coating by using composite supersonic flame, which mainly aims at spraying a multi-performance composite coating of Ni60+ with various contents of WC particles on the surface of HC-276, and utilizes induction heating to carry out induction remelting on the coating, thereby improving the uniformity and compactness of the coating, reducing the surface roughness and simultaneously realizing that the coating and collective interface elements are mutually diffused to form continuous interface metallurgical bonding.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a process method for spraying a high-hardness wear-resistant coating by using composite supersonic flame comprises the following steps:
(1) oil stains and defective parts on the surface to be sprayed of the HC-276 alloy base material are removed;
(2) carrying out uniform sand blasting treatment on the surface to be sprayed of the HC-276 alloy base material by using sand blasting equipment;
(3) the method comprises the following steps of selecting supersonic flame spraying to perform spraying treatment on the surface of a part to obtain a spraying coating, wherein the used powder is composite powder of Ni60 nickel-based alloy powder and ceramic WC particles, and the weight ratio of the ceramic WC particles in the composite powder is 3-45%;
(4) induction heating is used for induction remelting of the sprayed coating.
The process method for spraying the high-hardness wear-resistant coating by the composite supersonic flame comprises the steps of (1) clamping a part to be sprayed on a lathe, cleaning oil stains on the surface of a region to be sprayed by absolute ethyl alcohol and acetone, and then polishing and removing the surface defect part of the part.
The process method for spraying the high-hardness wear-resistant coating by the composite supersonic flame comprises the step (2) of carrying out sand blasting treatment on the surface to be sprayed by using white corundum by using sand blasting equipment.
In the process method for spraying the high-hardness wear-resistant coating by the composite supersonic flame, in the step (3), the composite powder is uniformly mixed with Ni60 nickel-based alloy powder and ceramic WC particles in different proportions by using a ball mill, and the method specifically comprises the following steps: the particle size of Ni60 nickel-based alloy powder is 10-45 mu m, the particle size of ceramic WC particles is 20-100 nm, the rotating speed of the ball mill is 300-400 r/min, and the ball milling time is 1-2 h.
The process method for spraying the high-hardness wear-resistant coating by using the composite supersonic flame comprises the following steps of (3) and optimized parameters of the supersonic flame spraying: the flow rate of oxygen is 130-180L/min, the flow rate of propane is 40-60L/min, the flow rate of air is 240-320L/min, the powder feeding speed is 25-45 g/min, and the spraying linear speed is 700-1500 mm/s.
The process method for spraying the high-hardness wear-resistant coating by using the composite supersonic flame comprises the step (4) of remelting and spraying the coating by using induction heating, wherein the induction heating temperature is 650-1250 ℃.
The process method for spraying the high-hardness wear-resistant coating by the composite supersonic flame comprises the following steps of: 14.5 to 16.5 percent of Cr14.0 to 7.0 percent of Fe4.0, 15.0 to 17.0 percent of Mo15.0, 3.0 to 4.5 percent of W, less than or equal to 2.5 percent of Co, less than or equal to 1.0 percent of Mn and the balance of Ni.
The process method for spraying the high-hardness wear-resistant coating by the composite supersonic flame comprises the following chemical components in percentage by weight of Ni60 nickel-based alloy powder: 0.6-1.1% of C, less than or equal to 4.5% of Si, less than or equal to 3.0% of Mo, 14-17.5% of Cr, 2.0-4.5% of B, 3.0-5.0% of Fe0 and the balance of Ni; the purity of the ceramic WC particles is more than 99.5 wt%.
The design idea of the invention is as follows:
the invention mainly aims to prepare various high-hardness wear-resistant coatings by supersonic flame spraying, simultaneously reduce the surface roughness of the coatings by composite induction heating and effectively improve the density and wear resistance of the coatings, and the coatings and collective interface elements are mutually diffused to form continuous interface metallurgical bonding, thereby realizing the preparation of compact, uniform and high-hardness wear-resistant coatings. Firstly, oil stains and defects on the surface of a part to be sprayed are removed, the interface of the coating is cleaned through sand blasting, the roughness of the interface is improved, then a multi-performance coating is prepared on the surface of the part by selecting supersonic flame spraying equipment according to the actual application requirement, and finally induction remelting is carried out on the coating by utilizing induction heating, so that the purposes of improving the uniformity and compactness of the coating, reducing the surface roughness and improving the wear resistance are achieved.
The invention has the following beneficial effects:
1. according to the invention, the Ni60 powder and the WC powder are uniformly mixed by the ball mill, and the powder components can be optimized and proportioned according to the actual application requirements, so that the multiple performances can be achieved, and the flexible, green and controllable coating manufacturing is realized.
2. The method uses the induction heating equipment to carry out induction remelting on the coating, not only realizes the mutual diffusion of the coating and collective interface elements to form continuous interface metallurgical bonding, but also effectively improves the uniformity and compactness of the coating, reduces the surface roughness of the coating and improves the integral wear resistance of the coating.
Drawings
FIGS. 1(a) - (b) are the supersonic spray coating and the composite induction heated spray coating of example 1. Wherein, fig. 1(a) is a supersonic spray coating, and fig. 1(b) is a composite induction heating spray coating.
FIG. 2 is the microhardness profiles of the 24mm length of either of the supersonic spray coating and the composite induction heating spray coating of example 1 (composite supersonic coating).
Detailed Description
In the specific implementation process, firstly, oil stains and defects on the surface of the part to be sprayed are removed, the interface of the coating is cleaned through sand blasting, the roughness of the interface is improved, secondly, supersonic flame spraying equipment is selected according to the actual application requirement to prepare a multi-performance coating on the surface of the part, and finally, induction heating is utilized to carry out induction remelting on the coating, so that the uniformity and the compactness of the coating are improved, and the surface roughness is reduced.
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
In the embodiment, the chemical components of the HC-276 alloy pipe fitting are as follows by weight percent: cr15.5, Fe5.0, Mo16, W3.5, Co1.2, Mn0.7 and the balance of Ni.
The preparation method of the composite supersonic flame spraying high-hardness wear-resistant coating comprises the following steps:
(1) oil stains and defective parts on the surface to be sprayed of the HC-276 alloy pipe fitting are removed;
(2) carrying out uniform sand blasting treatment on the surface to be sprayed by using sand blasting equipment;
(3) the surface of the part is sprayed by supersonic flame spraying, the used powder is Ni60+ WC composite powder, wherein the weight of the ceramic WC particles accounts for 20% of the composite powder;
the Ni60 nickel-based alloy powder comprises the following chemical components in percentage by weight: c0.8, Si3.2, Mo2.6, Cr15.7, B2.4, Fe4.1 and the balance of Ni; the purity of the ceramic WC particles was 99.6 wt%.
(4) Induction remelting is carried out on the sprayed coating by utilizing induction heating;
in the step (1), the part to be sprayed is clamped on a lathe, and after the surface oil stain of the area to be sprayed is cleaned by adopting absolute ethyl alcohol and acetone, the surface defect part of the part is polished and removed.
In the step (2), the surface to be sprayed is subjected to sand blasting treatment by using white corundum by sand blasting equipment.
In the step (3), uniformly mixing Ni60 and WC by using a ball mill, wherein the granularity of Ni60 powder is 10-45 μm, the granularity of WC particles is 20-100 nm, the rotating speed of the ball mill is 350r/min, and the ball milling time is 1.5 h; the optimized parameters of the supersonic flame spraying comprise oxygen flow rate of 150L/min, propane flow rate of 45L/min, air flow rate of 270L/min, powder feeding speed of 35g/min, spraying linear speed of 900mm/s, coating thickness of the supersonic spraying coating of 0.25-0.35 mm, surface roughness of less than Rz80 μm, and hardness of 830HV0.1。
In the step (4), induction heating is used for remelting the coating, the induction heating temperature is 1100 ℃, the remelting time is 5min, the thickness of the composite supersonic flame sprayed high-hardness wear-resistant coating is 0.25-0.35 mm, the surface roughness is lower than Rz30 mu m, and the hardness is 860HV0.1The uniformity and compactness of the coating are improved, the surface roughness is reduced, and the wear resistance is improved.
As shown in fig. 1(a) - (b), it can be seen from the supersonic spray coating and the composite induction heated spray coating of example 1 that the uniformity and compactness of the coating are improved and the surface roughness is reduced after the composite induction heating.
As shown in FIG. 2, from the microhardness distribution of the supersonic spray coating and the composite induction heated spray coating of example 1, which are any length sections of 24mm, it can be seen that the uniformity of the internal hardness of the coating after composite induction heating is better.
In the embodiment, 20% of WC ceramic particles are added according to the required use performance according to the set proportion, the spray coating is prepared by using supersonic flame spraying equipment, and then the induction heating is carried out to remelt the coating, so that the surface uniformity, the compactness and the roughness of the coating are effectively improved.
Example 2
In the embodiment, the chemical components of the HC-276 alloy pipe fitting are as follows by weight percent: cr15.5, Fe5.0, Mo16, W3.5, Co2.3, Mn0.4 and the balance of Ni.
The preparation method of the composite supersonic flame spraying high-hardness wear-resistant coating comprises the following steps:
(1) oil stains and defective parts on the surface to be sprayed of the HC-276 alloy pipe fitting are removed;
(2) carrying out uniform sand blasting treatment on the surface to be sprayed by using sand blasting equipment;
(3) the surface of the part is sprayed by supersonic flame spraying, the used powder is Ni60+ WC composite powder, wherein the weight of the ceramic WC particles accounts for 40% of the composite powder;
the Ni60 nickel-based alloy powder comprises the following chemical components in percentage by weight: c0.65, Si2.3, Mo1.3, Cr14.9, B3.6, Fe3.4 and the balance of Ni; the purity of the ceramic WC particles is 99.7 wt%.
(4) Induction remelting is carried out on the sprayed coating by utilizing induction heating;
in the step (1), the part to be sprayed is clamped on a lathe, and after the surface oil stain of the area to be sprayed is cleaned by adopting absolute ethyl alcohol and acetone, the surface defect part of the part is polished and removed.
In the step (2), the surface to be sprayed is subjected to sand blasting treatment by using white corundum by sand blasting equipment.
In the step (3), Ni60 and WC were uniformly mixed by using a ball millThe granularity of Ni60 powder is 10-45 mu m, the granularity of WC particles is 20-100 nm, the rotating speed of a ball mill is 350r/min, and the ball milling time is 1.5 h; the optimized parameters of the supersonic flame spraying comprise oxygen flow of 180L/min, propane flow of 55L/min, air flow of 280L/min and powder feeding speed of 30g/min, the spraying linear speed of 700mm/s and the thickness of the supersonic spraying coating of 0.25-0.35 mm, the surface roughness of less than Rz90 mu m and the hardness of 910HV0.1。
In the step (4), induction heating is used for remelting the coating, the induction heating temperature is 1200 ℃, the remelting time is 6min, the thickness of the composite supersonic flame sprayed high-hardness wear-resistant coating is 0.25-0.35 mm, the surface roughness is lower than Rz35 mu m, and the hardness is 950HV0.1The uniformity and compactness of the coating are improved, the surface roughness is reduced, and the wear resistance is improved.
In the embodiment, 40% of WC ceramic particles are added according to the required use performance according to the set proportion, the spray coating is prepared by using supersonic flame spraying equipment, and then the induction heating is carried out to remelt the coating, so that the surface uniformity, the compactness and the roughness of the coating are effectively improved.
Example 3
In the embodiment, the chemical components of the HC-276 alloy pipe fitting are as follows by weight percent: cr15.5, Fe5.0, Mo16, W3.5, Co0.6, Mn0.2 and the balance of Ni.
The preparation method of the composite supersonic flame spraying high-hardness wear-resistant coating comprises the following steps:
(1) oil stains and defective parts on the surface to be sprayed of the HC-276 alloy pipe fitting are removed;
(2) carrying out uniform sand blasting treatment on the surface to be sprayed by using sand blasting equipment;
(3) the surface of the part is sprayed by supersonic flame spraying, the used powder is Ni60+ WC composite powder, wherein the weight of the ceramic WC particles accounts for 5% of the composite powder;
the Ni60 nickel-based alloy powder comprises the following chemical components in percentage by weight: c1.03, Si4.1, Mo0.92, Cr16.4, B3.8, Fe4.6 and the balance of Ni; the purity of the ceramic WC particles is 99.8 wt%.
(4) Induction remelting is carried out on the sprayed coating by utilizing induction heating;
in the step (1), the part to be sprayed is clamped on a lathe, and after the surface oil stain of the area to be sprayed is cleaned by adopting absolute ethyl alcohol and acetone, the surface defect part of the part is polished and removed.
In the step (2), the surface to be sprayed is subjected to sand blasting treatment by using white corundum by sand blasting equipment.
In the step (3), uniformly mixing Ni60 and WC by using a ball mill, wherein the granularity of Ni60 powder is 10-45 μm, the granularity of WC particles is 20-100 nm, the rotating speed of the ball mill is 350r/min, and the ball milling time is 1.5 h; the optimized parameters of the supersonic flame spraying are oxygen flow rate of 130L/min, propane flow rate of 40L/min, air flow rate of 240L/min, powder feeding speed of 30g/min, spraying linear speed of 1000mm/s, thickness of 0.25-0.35 mm, surface roughness of less than Rz60 μm, and hardness of 730HV0.1。
In the step (4), induction heating is used for remelting the coating, the induction heating temperature is 950 ℃, the remelting time is 3min, the thickness of the composite supersonic flame sprayed high-hardness wear-resistant coating is 0.30-0.35 mm, the surface roughness is lower than Rz30 mu m, and the hardness is 760HV0.1The uniformity and compactness of the coating are improved, the surface roughness is reduced, and the wear resistance is improved.
In the embodiment, 5% of WC ceramic particles are added according to the required use performance according to the set proportion, the spray coating is prepared by using supersonic flame spraying equipment, and then the induction heating is carried out to remelt the coating, so that the surface uniformity, the compactness and the roughness of the coating are effectively improved.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention is described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features of the present invention may be substituted. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A process method for spraying a high-hardness wear-resistant coating by using composite supersonic flame is characterized by comprising the following steps:
(1) oil stains and defective parts on the surface to be sprayed of the HC-276 alloy base material are removed;
(2) carrying out uniform sand blasting treatment on the surface to be sprayed of the HC-276 alloy base material by using sand blasting equipment;
(3) the method comprises the following steps of selecting supersonic flame spraying to perform spraying treatment on the surface of a part to obtain a spraying coating, wherein the used powder is composite powder of Ni60 nickel-based alloy powder and ceramic WC particles, and the weight ratio of the ceramic WC particles in the composite powder is 3-45%;
(4) induction heating is used for induction remelting of the sprayed coating.
2. The process method of composite supersonic flame spraying high-hardness wear-resistant coating according to claim 1, wherein in the step (1), the part to be sprayed is clamped on a lathe, and after oil stains on the surface of the area to be sprayed are cleaned by adopting absolute ethyl alcohol and acetone, the surface defect part of the part is polished and removed.
3. The process method of composite supersonic flame spraying high-hardness wear-resistant coating according to claim 1, wherein in the step (2), the surface to be sprayed is subjected to sand blasting treatment by using white corundum as a sand blasting device.
4. The process method of composite supersonic flame spraying high-hardness wear-resistant coating according to claim 1, wherein in the step (3), the composite powder is prepared by uniformly mixing Ni60 nickel-based alloy powder and ceramic WC particles in different proportions by using a ball mill, specifically: the particle size of Ni60 nickel-based alloy powder is 10-45 mu m, the particle size of ceramic WC particles is 20-100 nm, the rotating speed of the ball mill is 300-400 r/min, and the ball milling time is 1-2 h.
5. The process method for composite supersonic flame spraying high-hardness wear-resistant coating according to claim 1, wherein in the step (3), the optimized parameters of supersonic flame spraying are as follows: the flow rate of oxygen is 130-180L/min, the flow rate of propane is 40-60L/min, the flow rate of air is 240-320L/min, the powder feeding speed is 25-45 g/min, and the spraying linear speed is 700-1500 mm/s.
6. The process method for spraying the high-hardness wear-resistant coating through the composite supersonic flame, according to claim 1, wherein in the step (4), the sprayed coating is remelted through induction heating, and the temperature of the induction heating is 650-1250 ℃.
7. A process according to claim 1, wherein the HC-276 alloy substrate has a chemical composition in the following ranges, in weight percent: 14.5 to 16.5 percent of Cr14.0 to 7.0 percent of Fe4.0, 15.0 to 17.0 percent of Mo15.0, 3.0 to 4.5 percent of W, less than or equal to 2.5 percent of Co, less than or equal to 1.0 percent of Mn and the balance of Ni.
8. The process of claim 1, wherein the Ni60 Ni-based alloy powder has the following chemical composition ranges in weight percent: 0.6-1.1% of C, less than or equal to 4.5% of Si, less than or equal to 3.0% of Mo, 14-17.5% of Cr, 2.0-4.5% of B, 3.0-5.0% of Fe0 and the balance of Ni; the purity of the ceramic WC particles is more than 99.5 wt%.
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