CN108239771B - Spraying process of metal protective coating of impeller and sealing ring - Google Patents
Spraying process of metal protective coating of impeller and sealing ring Download PDFInfo
- Publication number
- CN108239771B CN108239771B CN201711487725.8A CN201711487725A CN108239771B CN 108239771 B CN108239771 B CN 108239771B CN 201711487725 A CN201711487725 A CN 201711487725A CN 108239771 B CN108239771 B CN 108239771B
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- China
- Prior art keywords
- workpiece
- impeller
- sealing ring
- heating
- coating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2294—Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
Abstract
The invention provides a spraying process of a metal protective coating of an impeller and a sealing ring, which relates to the field of coating spraying and comprises the following steps: surface treatment: cleaning the inner wall surface of the workpiece treated by the cleaning agent; preheating a workpiece: putting the workpiece into a heat treatment furnace for preheating, so that the primer is cured and the workpiece is preheated; pre-dusting: spraying self-soluble metal alloy powder on the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring; and (3) heating: heating the workpiece by adopting an oxygen-acetylene flame or electric heating plate heating mode; spray melting: heating the self-soluble metal alloy powder coating to 1000-1300 ℃; and (3) cooling: cooling the workpiece, and ensuring that the cooling speed is less than 100 ℃/h; aiming at the protection of the impeller and the sealing ring, the invention selects anti-abrasion materials, and metal alloy powder (Ni60) is spray-welded on the inlet edge, the outlet edge, the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring of the impeller blade, so that the surface hardness of the easily-abraded part of the overflowing part is further improved, and the service life is prolonged.
Description
Technical Field
The invention relates to the field of coating spraying, in particular to a spraying process of a metal protective coating of an impeller and a sealing ring.
Background
The double suction pump is an important form of the centrifugal pump, and is widely applied to engineering due to the characteristics of high lift, large flow and the like. The impeller of the pump type actually comprises parts such as a pump shell, an impeller and the like, wherein different protective coatings are usually sprayed on the pump shell and the impeller due to different required functions, and because the impeller and the sealing ring are frequently contacted with various liquid substances, particularly in a river basin for conveying yellow river water, the abrasion rate of the impeller and the sealing ring is high in the occasion with relatively large content of silt, and therefore, the abrasion resistance of the impeller and the sealing ring needs to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a spraying process of a metal protective coating of an impeller and a sealing ring, so that abrasion resistance is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme: a spraying process of a metal protective coating of an impeller and a sealing ring comprises the following steps:
s1, surface treatment: cleaning the inner wall surface of the workpiece treated by the cleaning agent, removing surface pollutants, and coating a primer on the workpiece;
s2, preheating a workpiece: putting the workpiece into a heat treatment furnace for preheating, and placing the workpiece in a drying oven at the temperature of 275-300 ℃ for 25-45 min to solidify the primer and preheat the workpiece;
s3, pre-spraying powder: spraying self-soluble metal alloy powder on the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring;
s4, temperature rising: heating the workpiece in an oxygen-acetylene flame or electric heating plate heating mode, continuously measuring the temperature of the workpiece by a temperature detector in the heating process, and ensuring that the heating speed is less than 150 ℃/h;
s5, spray melting: heating the self-soluble metal alloy powder coating to 1000-1300 ℃ again to melt particles, floating slag on the surface of the coating, and dispersing generated boride and silicide in the coating;
s6, cooling: and cooling the workpiece, wherein the temperature of the workpiece is continuously measured by a thermometer in the cooling process, and the cooling speed is ensured to be less than 100 ℃/h.
Preferably, the cleaning agent in S1 is an ethanol or acetone solution.
Preferably, the same part inside the workpiece in S2 is loaded into the same heat treatment furnace for treatment, and the impeller and the sealing ring are loaded into different heat treatment furnaces for preheating.
Preferably, the autolyzed metal alloy powder in S3 comprises Ni 60.
Aiming at the protection of the impeller and the sealing ring, the invention selects anti-abrasion materials, and metal alloy powder (Ni60) is spray-welded on the inlet edge and the outlet edge of the impeller blade, the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring, so that the surface hardness of the easily-abraded part of the overflowing part is further improved, and the service life is prolonged.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a spraying process of a metal protective coating of an impeller and a sealing ring comprises the following steps:
s1, surface treatment: cleaning the inner wall surface of the workpiece treated by the cleaning agent, removing surface pollutants, and coating a primer on the workpiece;
s2, preheating a workpiece: putting the workpiece into a heat treatment furnace for preheating, and placing the workpiece in an oven with the temperature of 275 ℃ for 25min to solidify the primer and preheat the workpiece;
s3, pre-spraying powder: spraying self-soluble metal alloy powder on the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring;
s4, temperature rising: heating the workpiece in an oxygen-acetylene flame heating mode, continuously measuring the temperature of the workpiece by a temperature detector in the heating process, and ensuring that the heating speed is less than 150 ℃/h;
s5, spray melting: heating the self-soluble metal alloy powder coating to 1000 ℃ again to melt particles, floating slag to the surface of the coating, and dispersing generated boride and silicide in the coating;
s6, cooling: and cooling the workpiece, wherein the temperature of the workpiece is continuously measured by a thermometer in the cooling process, and the cooling speed is ensured to be less than 100 ℃/h.
Preferably, the cleaning agent in S1 is an ethanol or acetone solution.
Preferably, the same part inside the workpiece in S2 is loaded into the same heat treatment furnace for treatment, and the impeller and the sealing ring are loaded into different heat treatment furnaces for preheating.
Preferably, the autolyzed metal alloy powder in S3 comprises Ni 60.
Example (b):
a spraying process of a metal protective coating of an impeller and a sealing ring comprises the following steps:
s1, surface treatment: cleaning the inner wall surface of the workpiece treated by the cleaning agent, removing surface pollutants, and coating a primer on the workpiece;
s2, preheating a workpiece: putting the workpiece into a heat treatment furnace for preheating, and putting the workpiece into a drying oven with the temperature of 300 ℃ for 45min to solidify the primer and preheat the workpiece;
s3, pre-spraying powder: spraying self-soluble metal alloy powder on the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring;
s4, temperature rising: heating the workpiece by adopting an electric heating plate heating mode, continuously measuring the temperature of the workpiece by using a temperature detector in the heating process, and ensuring that the heating speed is less than 150 ℃/h;
s5, spray melting: heating the self-soluble metal alloy powder coating to 1300 ℃ again to melt particles, slagging and floating to the surface of the coating, and dispersing generated boride and silicide in the coating;
s6, cooling: and cooling the workpiece, wherein the temperature of the workpiece is continuously measured by a thermometer in the cooling process, and the cooling speed is ensured to be less than 100 ℃/h.
Preferably, the cleaning agent in S1 is an ethanol or acetone solution.
Preferably, the same part inside the workpiece in S2 is loaded into the same heat treatment furnace for treatment, and the impeller and the sealing ring are loaded into different heat treatment furnaces for preheating.
Preferably, the autolyzed metal alloy powder in S3 comprises Ni 60.
Aiming at the protection of the impeller and the sealing ring, the invention selects anti-abrasion materials, and metal alloy powder (Ni60) is spray-welded on the inlet edge and the outlet edge of the impeller blade, the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring, so that the surface hardness of the easily-abraded part of the overflowing part is further improved, and the service life is prolonged.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A spraying process of a metal protective coating of an impeller and a sealing ring is characterized by comprising the following steps:
s1, surface treatment: cleaning the inner wall surface of the workpiece treated by the cleaning agent, removing surface pollutants, and coating a primer on the workpiece;
s2, preheating a workpiece: putting the workpiece into a heat treatment furnace for preheating, and placing the workpiece in a drying oven at the temperature of 275-300 ℃ for 25-45 min to solidify the primer and preheat the workpiece;
s3, pre-spraying powder: spraying self-soluble metal alloy powder on the outer surface of the impeller opening ring and the inner surface of the pump body sealing ring;
s4, temperature rising: heating the workpiece in an oxygen-acetylene flame or electric heating plate heating mode, continuously measuring the temperature of the workpiece by a temperature detector in the heating process, and ensuring that the heating speed is less than 150 ℃/h;
s5, spray melting: heating the self-soluble metal alloy powder coating to 1000-1300 ℃ again to melt particles, floating slag on the surface of the coating, and dispersing generated boride and silicide in the coating;
s6, cooling: cooling the workpiece, and continuously measuring the temperature of the workpiece by using a temperature detector in the cooling process to ensure that the cooling speed is less than 100 ℃/h;
and the same part in the workpiece in the step S2 is loaded into the same heat treatment furnace for treatment, and the impeller and the sealing ring are loaded into different heat treatment furnaces for preheating.
2. The spraying process of the metal protective coating of the impeller and the sealing ring as claimed in claim 1, wherein the cleaning agent in S1 is ethanol or acetone solution.
3. The spraying process of the metal protective coating of the impeller and the sealing ring as claimed in claim 1, wherein the powder of the self-soluble metal alloy in S3 includes Ni 60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711487725.8A CN108239771B (en) | 2017-12-29 | 2017-12-29 | Spraying process of metal protective coating of impeller and sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711487725.8A CN108239771B (en) | 2017-12-29 | 2017-12-29 | Spraying process of metal protective coating of impeller and sealing ring |
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| Publication Number | Publication Date |
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| CN108239771A CN108239771A (en) | 2018-07-03 |
| CN108239771B true CN108239771B (en) | 2020-12-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016632A (en) * | 2019-03-25 | 2019-07-16 | 安徽开发矿业有限公司 | A kind of diaphragm pump flow passage part Wear-resistant Treatment technique |
| CN115213073A (en) * | 2022-06-13 | 2022-10-21 | 中核核电运行管理有限公司 | Novel erosion retarding method for inner wall of small-size valve of nuclear power plant |
| CN115261768A (en) * | 2022-08-25 | 2022-11-01 | 甘肃伯骊江3D打印科技有限公司 | Supersonic spraying process for pump body |
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| CN102506002A (en) * | 2012-01-01 | 2012-06-20 | 白山发电厂 | Cavitation-resistant water turbine blade and thermal spraying method |
| CN104389780A (en) * | 2014-09-24 | 2015-03-04 | 西南铝业（集团）有限责任公司 | High-pressure pump, plunger and surface enhancing processing technique for plunger |
| CN106367707A (en) * | 2016-09-23 | 2017-02-01 | 常州大学 | Laser remelting method for ultrasonic spraying of WC-12Co coating |
| CN107034466A (en) * | 2015-10-09 | 2017-08-11 | 埃瓦尔德德尔肯有限公司 | corrosion control coating |
| CN107413608A (en) * | 2017-09-18 | 2017-12-01 | 龙口博源新科金属涂层有限公司 | A kind of method, production line and its product in metal tube surface coating composite coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101393323B1 (en) * | 2012-05-10 | 2014-05-09 | 한국수력원자력 주식회사 | Method for oxide dispersion strengthened metal material by using laser |
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Patent Citations (5)
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|---|---|---|---|---|
| CN102506002A (en) * | 2012-01-01 | 2012-06-20 | 白山发电厂 | Cavitation-resistant water turbine blade and thermal spraying method |
| CN104389780A (en) * | 2014-09-24 | 2015-03-04 | 西南铝业（集团）有限责任公司 | High-pressure pump, plunger and surface enhancing processing technique for plunger |
| CN107034466A (en) * | 2015-10-09 | 2017-08-11 | 埃瓦尔德德尔肯有限公司 | corrosion control coating |
| CN106367707A (en) * | 2016-09-23 | 2017-02-01 | 常州大学 | Laser remelting method for ultrasonic spraying of WC-12Co coating |
| CN107413608A (en) * | 2017-09-18 | 2017-12-01 | 龙口博源新科金属涂层有限公司 | A kind of method, production line and its product in metal tube surface coating composite coating |
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| CN108239771A (en) | 2018-07-03 |
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