CN115213073A - Novel erosion retarding method for inner wall of small-size valve of nuclear power plant - Google Patents
Novel erosion retarding method for inner wall of small-size valve of nuclear power plant Download PDFInfo
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- CN115213073A CN115213073A CN202210665586.8A CN202210665586A CN115213073A CN 115213073 A CN115213073 A CN 115213073A CN 202210665586 A CN202210665586 A CN 202210665586A CN 115213073 A CN115213073 A CN 115213073A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000003628 erosive effect Effects 0.000 title claims abstract description 33
- 230000000979 retarding effect Effects 0.000 title description 4
- 238000005507 spraying Methods 0.000 claims abstract description 58
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 230000000116 mitigating effect Effects 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 39
- 230000008569 process Effects 0.000 claims description 26
- 238000004140 cleaning Methods 0.000 claims description 13
- 238000005488 sandblasting Methods 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 229910001361 White metal Inorganic materials 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000010969 white metal Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 8
- 239000007921 spray Substances 0.000 description 7
- 239000002585 base Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
- B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention belongs to the technical field of valve erosion corrosion mitigation, and particularly relates to a novel erosion mitigation method for an inner wall of a small-size valve of a nuclear power plant. Step 1: pre-treating; and 2, step: spraying treatment; and 3, step 3: after the coating is checked to be qualified, performing matching treatment; and 4, step 4: and (5) the blue oil test is qualified, namely the complete preparation of the erosion-resistant valve is completed. The invention has the beneficial effects that: compared with the currently applied spraying method for the inner wall of the valve, the method has the advantages that the aim of flexibly spraying the inner wall of the valve with smaller size can be fulfilled, the Ni60 coating with excellent erosion resistance can be obtained, the actual assembly requirement is met, and the engineering value of wide application is realized.
Description
Technical Field
The invention belongs to the technical field of valve erosion corrosion mitigation, and particularly relates to a novel erosion mitigation method for an inner wall of a small-size valve of a nuclear power plant.
Background
A large number of drain valve valves exist in a secondary loop of the nuclear power unit, are control equipment for medium conveying, are connected with a plurality of systems of the nuclear power unit, have the functions of regulation, cutoff, diversion, pressure stabilization and the like, and are indispensable components of the unit. The medium leakage caused by the erosion corrosion perforation of the valve body of the valve is one of the common problems of the failure of the valve, and the maintenance cost of the valve is more than 50 percent of the total maintenance cost every year. At present, the oxygen combustion-supporting supersonic flame spraying technology (HVOF) has the advantages of economy, high efficiency and the like, and is widely applied and paid attention to. Generally, HVOF technology is mostly applied for external spray protection of larger equipment. Corresponding inner hole spray guns are developed abroad aiming at the actual requirement that coatings also need to be sprayed inside a large number of small-size workpieces, such as inner hole spray guns of companies like Germany GTV, american uniquecoat and the like, but the inner hole spray guns are only suitable for spraying the interiors of regular components with short lengths, such as the inner wall of a pipeline, the spraying length is usually not more than 2m, the diameter is not less than 120mm, the inner hole spray guns cannot be applied to spraying the interiors of complex flow channel spaces, the inner hole spray guns also have the portability, the installation flexibility and the on-site application timeliness, and cannot be applied to the spraying protection of the inner wall of a small-size valve of a nuclear power plant. Corresponding inner-hole spray gun equipment is also developed on behalf of the West-An thermal engineering research institute in China, the minimum spraying inner diameter can reach 60mm, but the engineering application of the technology still lacks feasibility research, and related optimal spraying process parameters are unknown.
Disclosure of Invention
The invention aims to provide a novel method for slowing down erosion of the inner wall of a small-size valve in a nuclear power plant, which can realize spraying treatment on the inner wall of the small-size valve with a complex flow passage to obtain a Ni60 coating with excellent erosion resistance so as to slow down the erosion problem. The method has the advantages of strong flexibility, portability, timeliness of field application, capability of meeting field assembly requirements and the like.
The technical scheme of the invention is as follows: a novel method for slowing down erosion of the inner wall of a small-size valve of a nuclear power plant comprises the following steps:
step 1: pretreatment
Step 2: spray coating treatment
And step 3: after the coating is checked to be qualified, performing matching treatment;
and 4, step 4: and (5) the blue oil test is qualified, namely the complete preparation of the erosion-resistant valve is completed.
The step 1 comprises the following steps:
step 11: drying Ni60 raw powder, and inspecting and cleaning the inner surface of a valve to be sprayed;
step 12: sand blasting and polishing the inner surface of the valve;
step 13: the method comprises the steps of firstly detecting four indexes of particle size distribution, fluidity, bulk ratio and powder micro-morphology to be qualified through a laboratory, then transporting the Ni60 raw powder to a site for preparing site operation, shaking the Ni60 raw powder in a special powder container for ten minutes before site use until the powders with different densities are uniformly mixed, then putting the powder into an oven, preserving the temperature at 120 ℃ for 1.5-2.0 hours, filtering the powder by using a 200-mesh fine sieve before loading the powder into a powder feeder to remove impurities, and adding the powder into the powder feeder.
In the step 11, according to the scales on different surfaces, kerosene and alkali liquor are selected for cleaning, and finally acetone is used for cleaning until no visible oil scale exists on the surface.
The step 12 of sand blasting and polishing refers to cleaning and roughening the surface of the valve body by using clean and dry compressed air and a pressure type sand blasting device until the surface of the valve body presents a grey-white metal appearance and a uniform roughened surface.
The step 2 comprises the following steps:
step 21: the optimal process is a Ni60 coating spraying process, and the process parameters are carried out according to the table 1;
TABLE 1
Step 22: application of spray coating
Spraying the inner wall of the valve to be sprayed by adopting the process parameters in the step 21, arranging hanging piece samples at different parts of a valve body flow passage, monitoring the spraying thickness, carrying out on-site preliminary thickness measurement after the spraying is finished, wherein the spraying thickness is not less than 0.5mm, and supplementing the spraying in time if the coating thickness does not reach the designed thickness range; thickening and spraying the parts with serious abrasion;
step 23: quality inspection
After the spraying is finished, the appearance quality of the sprayed valve body coating is checked, the surface of the coating is compact and uniform, the defects of bulging, peeling, block falling and the like do not exist, and the appearance quality check is qualified.
The step 3 comprises the following steps:
step 31: the matching processing mainly carries out machining processing on the matching surface of the valve body to ensure that the valve body meets the technical requirements of assembly;
step 32: the fitting test is mainly used for testing the assembly condition through a blue oil test.
The invention has the beneficial effects that: compared with the currently applied spraying method for the inner wall of the valve, the method has the advantages that the aim of flexibly spraying the inner wall of the valve with smaller size can be fulfilled, the Ni60 coating with excellent erosion resistance can be obtained, the actual assembly requirement is met, and the engineering value of wide application is realized.
Drawings
FIG. 1 is a flow chart of a method for determining an optimal spray coating process;
FIG. 2 is a comparison of wear rates of wear particles of the optimal process coating and valve parent material;
fig. 3 is a flow chart of a novel erosion retarding method for an inner wall of a small-sized valve in a nuclear power plant according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
In order to effectively solve the problem of erosion of the inner wall of the small-sized valve of the nuclear power plant, and provide a novel erosion retarding method for the inner wall of the small-sized valve of the nuclear power plant on the premise of ensuring the quality feasibility and the economical efficiency, so that spraying in a more complicated flow channel space is realized, and an anti-erosion coating with excellent erosion resistance is obtained on the premise of meeting the actual assembly requirement.
Obtaining optimum process parameters by
Valve body base material test
The valve body material is subjected to physicochemical analysis tests (chemical component analysis, mechanical property analysis, organizational structure analysis and the like) and erosion/wear resistance tests, the erosion wear and failure mechanism of the valve body material is mastered, and the valve body material is used as a reference to be contrasted and analyzed with the coating prepared by different spraying process parameters.
Coating design and preparation
The original coating material adopted by the invention is a Ni60 powdery sample, and the spraying base material is a valve body base material; the researched process parameters are parameters such as spraying distance, powder feeding amount and the like; the Ni60 coating is prepared by adopting miniaturized HVOF spraying equipment of Sian thermal research institute and adopting different spraying process parameters.
And 3, step 3: and (3) analyzing the microstructure and the performance of each Ni60 coating prepared in the second step, and comparing and analyzing each performance of the base material in the first step. The microstructure is characterized by adopting a Scanning Electron Microscope (SEM), an X-ray diffraction technology (XRD) and the like; the analysis of the coating performance is mainly carried out from the mechanical properties (hardness, bonding strength and the like) and the erosion/wear resistance (wear resistance particle wear test and erosion resistance test) of the coating.
And screening the coating with excellent comprehensive performance and a preparation process thereof according to the comprehensive analysis result. If the preparation process is not ideal, the process parameters are readjusted, and the coating preparation and performance analysis are carried out again until the optimal spraying process is obtained.
And obtaining the optimal spraying process parameters according to the analysis result.
The optimal spraying process parameters obtained by the present invention are shown in table 1, and the comparison results between the coating prepared by the optimal process and the substrate are shown in fig. 2.
TABLE 1 optimal Process parameters for coating preparation
As shown in fig. 3, a novel method for reducing erosion of an inner wall of a small-sized valve in a nuclear power plant includes the following steps:
step 1: pretreatment
The pretreatment of the spraying raw powder material and the inner wall of the valve to be sprayed specifically comprises the following steps:
step 11: drying Ni60 raw powder, and inspecting and cleaning the inner surface of a valve to be sprayed;
step 12: sand blasting and polishing the inner surface of the valve;
step 13: the method comprises the steps of firstly detecting four indexes of particle size distribution, fluidity, bulk ratio and powder micro morphology (contrast with a standard sample under a microscope) by a laboratory, then transporting the qualified powder to a site for preparing on-site operation, shaking the Ni60 raw powder in a special powder container for ten minutes before the powder is used on site until the powder with different densities is uniformly mixed, then putting the powder into an oven, keeping the temperature at 120 ℃ for 1.5-2.0 hours, filtering the powder by using a 200-mesh fine sieve before the powder is loaded into a powder feeder to remove impurities, adding the powder into the powder feeder, strictly cleaning the surface of a valve body, selecting kerosene and alkali liquor for cleaning according to the scale on different surfaces, finally cleaning the valve body by using acetone until no oil dirt is visible on the surface, and performing cleaning and roughening treatment on the surface of the valve body by using clean and dry compressed air through a pressure type device until the surface of the valve body is gray metal appearance and uniform roughened surface. In the embodiment of the invention, high-quality carborundum is selected for polishing, the granularity is 16 meshes, compressed air is filtered to meet the requirement of no water and no oil, the surface of a component is carefully cleaned and roughened, and the aim of improving the spraying bonding strength is fulfilled. The spraying area of the part is roughened and activated by a pressure type sand blasting method, so that the surface roughness of the matrix reaches Rz 40-80 um, attachments such as oxide, grease, dirt and the like on the surface of the part are thoroughly removed, and the part is uniformly roughened and exposes metallic luster. Within 30 minutes after the completion of the blasting, the spraying operation must be performed, or the secondary blasting treatment must be performed.
Step 2: spray coating treatment
Treat the spraying valve body inner wall and carry out spraying Ni60 coating, specifically include:
step 21: the optimal process is a Ni60 coating spraying process, and the process parameters are carried out according to the table 1;
TABLE 1 optimal Process parameters for coating preparation
Step 22: application of spray coating
And (3) spraying the inner wall of the valve to be sprayed by adopting the process parameters in the step (21), arranging hanging piece samples at different parts of the valve body flow passage, monitoring the spraying thickness, and performing on-site preliminary thickness measurement after the spraying is finished, wherein the spraying thickness is not less than 0.5mm. If the thickness of the coating does not reach the designed thickness range, supplementary spraying is carried out in time; and performing thickening spraying on the parts with serious abrasion.
Step 23: quality inspection
After the spraying is finished, the appearance quality of the sprayed valve body coating is checked, the surface of the coating is compact and uniform, the defects of bulging, peeling, block falling and the like do not exist, and the appearance quality check is qualified.
And step 3: after the coating is checked to be qualified, the matching treatment is carried out
Step 31: the matching treatment mainly carries out machining treatment on the matching surface of the valve body, and the valve body is ensured to meet the assembly technical requirements;
step 32: the compatibility test is mainly used for testing the assembly condition through a blue oil test.
And 4, step 4: and (5) the blue oil test is qualified, namely the complete preparation of the erosion-resistant valve is completed.
Claims (7)
1. A novel method for slowing down erosion of the inner wall of a small-size valve of a nuclear power plant is characterized by comprising the following steps:
step 1: pre-treating;
and 2, step: spraying treatment;
and step 3: after the coating is checked to be qualified, performing matching treatment;
and 4, step 4: and (5) the blue oil test is qualified, namely the complete preparation of the erosion-resistant valve is completed.
2. The novel method for reducing the erosion of the inner wall of the small-sized valve in the nuclear power plant as claimed in claim 1, wherein the step 1 comprises the following steps:
step 11: drying Ni60 raw powder, and inspecting and cleaning the inner surface of a valve to be sprayed;
step 12: sand blasting and polishing the inner surface of the valve;
step 13: the method comprises the steps of firstly detecting four indexes of particle size distribution, fluidity, bulk ratio and powder micro-morphology to be qualified through a laboratory, then transporting the Ni60 raw powder to a site for preparing site operation, shaking the Ni60 raw powder in a special powder container for ten minutes before site use until the powders with different densities are uniformly mixed, then putting the powder into an oven, preserving the temperature at 120 ℃ for 1.5-2.0 hours, filtering the powder by using a 200-mesh fine sieve before loading the powder into a powder feeder to remove impurities, and adding the powder into the powder feeder.
3. The novel method for reducing the erosion of the inner wall of the small-sized valve of the nuclear power plant as claimed in claim 2, wherein: in the step 11, according to the scales on different surfaces, kerosene and alkali liquor are selected for cleaning, and finally acetone is used for cleaning until no visible oil scale exists on the surface.
4. The novel method for reducing the erosion of the inner wall of the small-sized valve of the nuclear power plant as claimed in claim 2, wherein: the step 12 of sand blasting and polishing refers to cleaning and roughening the surface of the valve body by using clean and dry compressed air and a pressure type sand blasting device until the surface of the valve body presents a grey-white metal appearance and a uniform roughened surface.
5. The novel method for reducing the erosion of the inner wall of the small-sized valve in the nuclear power plant as claimed in claim 1, wherein the step 2 comprises the following steps:
step 21: the optimal process is a Ni60 coating spraying process, and the process parameters are carried out according to the table 1;
TABLE 1
Step 22: application of spray coating
Spraying the inner wall of the valve to be sprayed by adopting the process parameters in the step 21, arranging hanging piece samples at different parts of a valve body flow passage, monitoring the spraying thickness, carrying out on-site preliminary thickness measurement after the spraying is finished, wherein the spraying thickness is not less than 0.5mm, and supplementing the spraying in time if the coating thickness does not reach the designed thickness range; carrying out thickening spraying on the part with serious abrasion;
step 23: quality inspection
After the spraying is finished, the appearance quality of the sprayed valve body coating is checked, the surface of the coating is compact and uniform, the defects of bulging, peeling, block falling and the like do not exist, and the appearance quality check is qualified.
6. The novel erosion mitigation method for the inner wall of the small-sized valve of the nuclear power plant as claimed in claim 1, wherein said step 3 comprises the following steps:
step 31: the matching treatment mainly carries out machining treatment on the matching surface of the valve body, and the valve body is ensured to meet the technical requirements of assembly.
7. The novel method for reducing the erosion of the inner wall of the small-sized valve in the nuclear power plant as claimed in claim 6, wherein the step 3 comprises the following steps:
step 32: the fitting test is mainly used for testing the assembly condition through a blue oil test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210665586.8A CN115213073A (en) | 2022-06-13 | 2022-06-13 | Novel erosion retarding method for inner wall of small-size valve of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210665586.8A CN115213073A (en) | 2022-06-13 | 2022-06-13 | Novel erosion retarding method for inner wall of small-size valve of nuclear power plant |
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| Publication Number | Publication Date |
|---|---|
| CN115213073A true CN115213073A (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210665586.8A Pending CN115213073A (en) | 2022-06-13 | 2022-06-13 | Novel erosion retarding method for inner wall of small-size valve of nuclear power plant |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357755A (en) * | 1986-05-30 | 1988-03-12 | Kobe Steel Ltd | Ni-base alloy powder for thermal spraying and its production |
| US5499672A (en) * | 1994-06-01 | 1996-03-19 | Chuetsu Metal Works Co., Ltd. | Mold for continuous casting which comprises a flame sprayed coating layer of a tungsten carbide-based wear-resistant material |
| CN201344296Y (en) * | 2008-12-24 | 2009-11-11 | 温州耐密特阀门有限公司 | Metal hard seal valve |
| CN101787510A (en) * | 2010-01-13 | 2010-07-28 | 西安热工研究院有限公司 | Preparation technology of turbine though-flow part coating against solid particle erosion |
| CN102732877A (en) * | 2012-06-21 | 2012-10-17 | 西安热工研究院有限公司 | Preparation method of inner-wall wear resistant coating of small-bore pipeline and bend |
| CN108239771A (en) * | 2017-12-29 | 2018-07-03 | 三联泵业股份有限公司 | A kind of spraying process of the metal protection coating of impeller and sealing ring |
| 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 |
| CN113388833A (en) * | 2021-05-31 | 2021-09-14 | 四川大学 | Preparation method of erosion and wear resistant fluid valve part |
| CN113652624A (en) * | 2021-08-10 | 2021-11-16 | 水利部杭州机械设计研究所 | Tungsten carbide/silicon carbide-based composite material and coating suitable for oxygen-propane supersonic flame short-distance spraying and preparation method thereof |
| CN113969388A (en) * | 2021-09-18 | 2022-01-25 | 中国航发南方工业有限公司 | Preparation method of wear-resistant coating on inner surface of part with large depth-diameter ratio |
-
2022
- 2022-06-13 CN CN202210665586.8A patent/CN115213073A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357755A (en) * | 1986-05-30 | 1988-03-12 | Kobe Steel Ltd | Ni-base alloy powder for thermal spraying and its production |
| US5499672A (en) * | 1994-06-01 | 1996-03-19 | Chuetsu Metal Works Co., Ltd. | Mold for continuous casting which comprises a flame sprayed coating layer of a tungsten carbide-based wear-resistant material |
| CN201344296Y (en) * | 2008-12-24 | 2009-11-11 | 温州耐密特阀门有限公司 | Metal hard seal valve |
| CN101787510A (en) * | 2010-01-13 | 2010-07-28 | 西安热工研究院有限公司 | Preparation technology of turbine though-flow part coating against solid particle erosion |
| CN102732877A (en) * | 2012-06-21 | 2012-10-17 | 西安热工研究院有限公司 | Preparation method of inner-wall wear resistant coating of small-bore pipeline and bend |
| CN108239771A (en) * | 2017-12-29 | 2018-07-03 | 三联泵业股份有限公司 | A kind of spraying process of the metal protection coating of impeller and sealing ring |
| 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 |
| CN113388833A (en) * | 2021-05-31 | 2021-09-14 | 四川大学 | Preparation method of erosion and wear resistant fluid valve part |
| CN113652624A (en) * | 2021-08-10 | 2021-11-16 | 水利部杭州机械设计研究所 | Tungsten carbide/silicon carbide-based composite material and coating suitable for oxygen-propane supersonic flame short-distance spraying and preparation method thereof |
| CN113969388A (en) * | 2021-09-18 | 2022-01-25 | 中国航发南方工业有限公司 | Preparation method of wear-resistant coating on inner surface of part with large depth-diameter ratio |
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Application publication date: 20221021 |