CN112257219B - Method for removing sulfide corrosion layer on surface of blade by utilizing arc plasma - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 39
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000005260 corrosion Methods 0.000 title claims abstract description 29
- 230000007797 corrosion Effects 0.000 title claims abstract description 29
- 238000001914 filtration Methods 0.000 claims description 15
- 238000001704 evaporation Methods 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000003746 surface roughness Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 2
- 238000005486 sulfidation Methods 0.000 claims 2
- 230000008676 import Effects 0.000 claims 1
- 210000002381 plasma Anatomy 0.000 abstract 2
- 230000008569 process Effects 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000003911 water pollution Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910016951 Fe0.5Ni0.5 Inorganic materials 0.000 description 1
- -1 SO 2 Chemical class 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000010329 laser etching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a method for removing sulfide corrosion layers on the surfaces of blades by utilizing arc-spot plasmas. The invention determines the optimal technological parameters of the arc spot plasma device by utilizing the thickness of the vulcanized layer on the surface of the blade, and has high economic benefit and strong operability.
Description
Technical Field
The invention belongs to the field of cleaning of corrosion layers on alloy surfaces, and particularly relates to a method for removing sulfide corrosion layers on blade surfaces by using arc plasma.
Background
When the helicopter engine compressor blade is in service, the helicopter engine compressor blade is in a high-temperature, high-pressure and high-speed airflow state for a long time. The flight height of the civil helicopter is about 2-4 km, the flight height of the military helicopter can reach about 6km, and the helicopter-18 type military helicopter in China breaks through the flight height of more than 9 km. Under the condition of high altitude, the air contains various sulfides such as SO 2、SO3、H2 S, sulfuric acid mist and the like, and the sulfide can corrode the surface of the blade under the comprehensive actions of wear fatigue and the like, SO that a sulfide corrosion layer is generated. The presence of the corrosion layer can affect the quality of the remanufactured product and therefore requires improvement and removal thereof.
Conventional removal methods such as sand blasting, chemical pickling, laser etching, etc., all of which can result in a range of environmental pollution: water pollution, noise pollution, etc. Moreover, because the impeller has a complex shape, the surface is not a flat surface after cavitation, abrasion and corrosion, and therefore, the cleaning effect of these methods is not ideal, such as sand blasting, and once sand inclusion occurs, inclusions are formed in the remanufactured layer, which seriously affects the quality of the remanufactured layer. When the arc spot plasma device removes the corrosion layer, the energy input into the cathode arc spot by the arc is far greater than the energy required by material evaporation in the arc spot range, and the vulcanized layer on the stainless steel surface is almost instantaneously removed due to evaporation and bursting. The whole arc plasma removing process is carried out in a closed space, so that noise is hardly generated; and water pollution is not caused, so that the method is a novel efficient and environment-friendly cleaning method.
The arc spot plasma removal process is generally applied to removing oxide layers or organic pollutants on the metal surface at home and abroad at present, and is applied to helicopter engine compressor blades serving in polysulfide environments. At present, the research at home and abroad is less, data support is lacking in execution, technological parameters can be obtained only through one experiment, the obtained parameters can not be reused, the operation is difficult, the workload is large, and the efficiency is low. Therefore, it is important to build a removal parameter model to directly relate the thickness of the cured layer to the optimal process parameters.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a method for removing sulfide corrosion layers on the surface of a blade by utilizing arc plasma. The method successfully removes the vulcanized corrosion layer on the surface of the sample by utilizing the arc plasma under the condition of not causing noise and environmental pollution. By collecting experimental data, a removal parameter determination model is established, different vulcanized corrosion layer thicknesses are substituted into the model to determine removal parameters, each removal parameter comprises one vulcanized layer thickness data and arc spot plasma current data, and cathode arc spots with different current parameters are selected accordingly, so that the purpose of removing the vulcanized corrosion layer is achieved, and the surface roughness of a sample subjected to a removal process meets the use requirement of the surface of a compressor blade.
The invention relates to a method for removing sulfide corrosion layers on the surfaces of blades by utilizing arc plasma, which comprises the following steps:
step 1: determination of the thickness of the vulcanized layer
Measuring the thickness of a surface vulcanized layer from a helicopter engine compressor blade containing a vulcanized corrosion layer, wherein when the thickness of the vulcanized layer is measured, the section perpendicular to the vulcanized layer is taken as a detection surface, and the difference value between the position where the vulcanized layer starts to be generated on the surface of a substrate and the position where the vulcanized layer ends is taken as a measurement value d of the thickness of the vulcanized layer;
Step 2: creation of removal parameter determination model
2A, evaporating a vulcanized layer with h1 thickness in a single arc spot range of the sample by using an arc spot plasma device, wherein the optimal current parameter is I h1; adjusting different sulfide layer thicknesses (such as h2, h3 and … …) to obtain corresponding optimal current parameters (such as I h2、Ih3 and … …);
The optimal current parameter is that arc spot plasma removal technology is respectively carried out on samples with different sulfide layer thicknesses (5-59 mu m) by utilizing an arc spot plasma device, the surface sulfide layer is successfully removed, and the surface roughness of the treated samples is less than Ra=3.0, and the experiment meeting the use requirement of the surface of the compressor blade is regarded as an effective experiment. For example, I 10μm refers to a current parameter when a 10 μm-thick vulcanized layer is removed by an arc-spot plasma device, and the surface roughness of a treated sample is less than ra=3.0 and meets the use requirement of the surface of a compressor blade. When the thickness of the vulcanized layer is regulated in the process 2a, the regulating range of the thickness of the vulcanized layer is 5-59 mu m, at least 10-15 different thickness values are taken in the range, and the different thickness values are changed in a gradient way.
2B, taking a sulfide layer thickness and an optimal current parameter under the specific thickness as a set of removal parameters, and importing a plurality of sets of removal parameter data into origin Pro software, wherein the sulfide layer thickness is taken as an X axis, and the data are as follows: h1, h2, h3, h4, … …; the corresponding optimal current parameter is taken as a Y axis, and the data are as follows: i h1、Ih2、Ih3、Ih4, … …; selecting data, and clicking in sequence: the Plot-Line, obtain the Line graph; clicking in sequence: data-Remove Bad Data Points, eliminating abnormal Data; clicking in sequence: analysis-Signal Processing-Smoothing-Open dialog is opened: the Recalculate option in the dialog is set to: audo, the filtering method is set as follows: the Savitzky-Golay, points of Window option parameter is set to: clicking OK, and performing filtering treatment to obtain abnormal data elimination and curve data after filtering treatment;
2c, importing the data processed by the OriginPro software into a working catalog of Matlab software, wherein the abscissa X is the thickness of a vulcanized layer (h 1, h2, h3, h4 and … …), and the ordinate Y is the current parameter (I h1′、Ih2′、Ih3′、Ih4', … …) after filtering; in the command window, input:
>>load x.txt
>>load y.txt
>>cftool
Running a command, opening a curve fitting tool box, selecting a function type Custom Equation, and manually adding ExpDecay a function model, wherein the equation is as follows: f (x) =a+b×exp (- (x-c)/d). Fitting the removal data according to ExpDecay functions, determining the value of a, b, c, d in the equation, and substituting the value into a function model to obtain a removal parameter determination model, wherein the removal parameter determination model is a relation function between the current parameter I and the vulcanized layer thickness d.
Step 3: substituting the thickness of the vulcanized layer measured in the step 1 into the removal parameter determination model obtained in the step 2, and obtaining corresponding removal parameters.
In practical application, the thickness d of the sulfide layer on the surface of the sample is measured only from the blade of the compressor of the helicopter engine containing the sulfide corrosion layer; the measured thickness d of the vulcanized layer is substituted into the removal parameter determination model provided by the invention, so that the removal parameters can be obtained, and cathode arc spots with different current parameters are selected according to the removal parameters, thereby achieving the purpose of removing the vulcanized corrosion layer, and enabling the surface roughness of the sample subjected to the removal process to meet the use requirement of the surface of the compressor blade. Convenient operation, the practicality is strong, and efficiency is higher.
The beneficial effects of the invention are as follows:
Compared with the traditional surface cleaning process, the arc spot plasma removing method is used as a novel cleaning process, the whole removing process is carried out in a closed space, almost no noise is generated, water pollution is not brought, and the novel cleaning method is efficient and environment-friendly. At present, the arc spot plasma removal process at home and abroad is generally applied to remove oxide layers or organic pollutants on the surface of metal. The arc spot plasma removal process is applied to the helicopter engine compressor blade which is in service in the sulfide-containing environment. At present, the research is less at home and abroad, data support is lacking in execution, technological parameters can be obtained only through one experiment, the obtained parameters can not be reused, the operation is difficult, the workload is large, and the efficiency is low.
The method establishes a removal parameter determination model by collecting removal parameter data, substitutes different vulcanized corrosion layer thicknesses into the model to determine removal parameters, wherein each removal parameter comprises one vulcanized layer thickness data and arc spot plasma current data, and accordingly, cathode arc spots with different current parameters are selected to achieve the purpose of removing the vulcanized corrosion layer. The determination coefficient R-square value of the removal parameter determination model established by the invention is 0.992 (the determination coefficient is also called as the goodness of fit, the statistic ranges from 0 to 1, the closer to 1, the better the goodness of fit of the model is), the higher the goodness of fit is, and the reliability is strong. The method removes the parameter determination model, directly links the thickness of the vulcanized layer with the optimal technological parameters, has convenient operation and strong practicability, and can recycle the vulcanized corrosion layer with similar components after once model establishment.
Drawings
FIG. 1 shows the thickness of the vulcanized layer on the surface of the sample after various etching times: a) 12h, b) 48h, c) 120h.
FIG. 2 shows the morphology and element distribution of the vulcanized layer on the surface of the sample after 120h corrosion: a) the section morphology of the vulcanized layer, b) the distribution of S element, C) the distribution of C element, d) the distribution of Fe element, e) the respective cases of Cr element, f) the distribution of Ni element.
FIG. 3 shows EDS analysis of the sample surface after treatment with different current parameters: a) 10A, b) 20A, c) 30A.
Fig. 4 is a graph of a removal parameter determination model according to an embodiment of the present invention.
Detailed Description
The following embodiments will further illustrate the present invention to better explain the advantages and features of the present invention.
The invention aims to provide a method for removing a vulcanized corrosion layer on the surface of a compressor blade of a helicopter engine, which is clean, efficient and practical. In order to achieve the above object, the method for determining the removal parameters of the arc spot plasma device comprises the following steps:
1. measuring a surface sulfide layer thickness d from a helicopter engine compressor blade containing a sulfide corrosion layer; the method for measuring the thickness d of the vulcanized layer can be as follows: measuring the thickness of the cross section of the sulfide corrosion layer by using a scanning electron microscope or a metallographic microscope through a corrected scale by taking the cross section vertical to the sulfide layer as a detection surface;
2. Creation of removal parameter determination model
2A, placing a sample into a CY-300mL high-temperature high-pressure reaction kettle, removing air through 1h high-purity CH 4, continuously filling CH 4 to 0.3MPa into the reaction kettle, finally filling hydrogen sulfide to a total air pressure of 1.5MPa, setting the reaction temperature to 300 ℃, and keeping the temperature for 12-240 h, so as to obtain vulcanized corrosion layers with different thicknesses on the surface of the sample, wherein the appearance example is shown in figure 1;
2b, performing morphology observation and composition analysis on the vulcanized layer on the surface of the corroded sample, determining a layered structure of the vulcanized layer, performing EDS analysis on the corroded layer, wherein the composition distribution example of the vulcanized corroded layer is shown as a result in a graph as shown in FIG. 2, in the example, the S element in the whole corroded layer is a main element and accounts for about 55%, the Cr content in the inner layer of the vulcanized layer is more, and the Fe content is about 15%; the outer layer of the vulcanized layer has more Fe content, up to 40 percent and very little Cr content. This demonstrates that the outer layer is mainly a Fe, S compound, while the inner layer is mainly a Fe, S, cr compound. XRD analysis of the vulcanized layer shows that the main substance in the inner layer of the vulcanized film is Fe (1-x)S、Cr3S4、Cr2S3, and the main substance in the outer layer is Fe (1-x)S、(Fe0.5Ni0.5)0.96 S;
2c, calculating the lattice energy of the vulcanized product by using a Born Haber cycle, wherein the formula is as follows: (in the formula/>) For negative enthalpy of formation of the ion crystal, S is energy absorbed by sublimation of the element, I is a sum of ionization energy and electron affinity energy of the element), and FeS is taken as an example:
U＝-100kJ/mol+415kJ/mol+5kJ/mol+1560kJ/mol+200kJ/mol
U＝2080kJ/mol
The same principle can be obtained: the lattice energy of Cr 2S3 is about 3100kJ/mol, and the lattice energy of NiS is about 2300kJ/mol.
After the lattice energy is calculated, the formula is used: (wherein r represents arc spot radius, h represents removal depth, namely thickness of a vulcanized layer, omega represents sulfide density, U represents lattice energy calculated by the prior method, M represents molar mass of sulfide, and wt% represents mass percent of each component), and energy required for evaporating sulfides with different components can be calculated in a single arc spot range respectively. And adding the energy required by each component to obtain the energy required by evaporating the whole vulcanized layer within the range of a single arc spot. As the thickness of the cured layer increases from 5 μm to 59 μm, the energy required to evaporate the cured layer over a single arc patch increases from 1.123×10 -3 J to 1.279×10 -2 J. The energy E required by evaporation calculated in the step only provides theoretical reference for parameter design of the next experiment, and specific removal parameter data is based on the thickness of the vulcanized layer obtained by the experiment and current parameters.
2D, designing the next experimental parameters according to the energy required by removing the vulcanized layer: as a control, the energy required for evaporating the vulcanized layer with a thickness of 10 μm was 2.245 X10 -3 J, and the optimum current parameter was 10A. Calculating the energy required for evaporating the vulcanized layer with the thickness of h1 in the single arc spot range of the sample according to the formula of the step 2b to obtain E h1, wherein the optimal current parameter is I h1; adjusting different sulfide layer thicknesses (e.g., h2, h3, … …) to obtain corresponding energies (e.g., E h2、Eh3, … …) and optimal current parameters (e.g., I h2、Ih3, … …); the optimal current parameter is that arc spot plasma removal technology is respectively carried out on samples with different sulfide layer thicknesses (5-59 mu m) by utilizing an arc spot plasma device, the surface sulfide layer is successfully removed, and the surface roughness of the treated samples is less than Ra=3.0, and the experiment meeting the use requirement of the surface of the compressor blade is regarded as an effective experiment. For example, I 10μm refers to a current parameter when a 10 μm-thick vulcanized layer is removed by an arc-spot plasma device, and the surface roughness of a treated sample is less than ra=3.0 and meets the use requirement of the surface of a compressor blade. When the thickness of the vulcanized layer is regulated in the 2c process, the regulating range of the thickness of the vulcanized layer is 5-59 mu m, at least 10-15 different thickness values are taken in the range, and the different thickness values are changed in a gradient way.
2E, taking a sulfide layer thickness and an optimal current parameter under the specific thickness as a set of removal parameters, and importing a plurality of sets of removal parameter data into origin Pro software, wherein the sulfide layer thickness is taken as an X axis, and the data are as follows: h1, h2, h3, h4, … …; the corresponding optimal current parameter is taken as a Y axis, and the data are as follows: i h1、Ih2、Ih3、Ih4, … …; selecting data, and clicking in sequence: the Plot-Line, obtain the Line graph; clicking in sequence: data-Remove Bad Data Points, eliminating abnormal Data; clicking in sequence: analysis-Signal Processing-Smoothing-Open dialog is opened: the Recalculate option in the dialog is set to: audo, the filtering method is set as follows: the Savitzky-Golay, points of Window option parameter is set to: clicking OK, and performing filtering treatment to obtain abnormal data elimination and curve data after filtering treatment;
Specifically, in this embodiment, when the data of the removal parameter set is imported into the origin pro software, the data of the X-axis vulcanized layer thickness is: 0.5, 10, 15, 21, 28, 33, 40, 45, 52, 59; the data of the Y-axis current parameter are: 0. 7.5, 10, 14, 17, 20, 23, 25, 27, 28, 29. Selecting data, and clicking in sequence: the Plot-Line, obtain the Line graph; clicking in sequence: data-Remove Bad Data Points, eliminating abnormal Data; clicking in sequence: analysis-Signal Processing-Smoothing-Open dialog is opened: the Recalculate option in the dialog is set to: audo, the filtering method is set as follows: the Savitzky-Golay, points of Window option parameter is set to: and 5, clicking OK, and performing filtering processing to obtain the abnormal data elimination and the curve data after the filtering processing.
2F, importing the data processed by the origin Pro software into a working catalog of Matlab software, wherein the abscissa X is the thickness of a vulcanized layer (h 1, h2, h3, h4 and … …), and the ordinate Y is the current parameter (I h1′、Ih2′、Ih3′、Ih4', … …) after filtering; in the command window, input:
>>load x.txt
>>load y.txt
>>cftool
Running a command, opening a curve fitting tool box, selecting a function type Custom Equation, and manually adding ExpDecay a function model, wherein the equation is as follows: f (x) =a+b×exp (- (x-c)/d). Fitting the removal data according to ExpDecay functions, determining the value of a, b, c, d in the equation, and substituting the value into a function model to obtain a removal parameter determination model, wherein the removal parameter determination model is a relation function between the current parameter I and the vulcanized layer thickness d.
Specifically, in this embodiment, the data processed by the OriginPro software is imported into the working catalog of Matlab software, and the abscissa X is the thickness of the vulcanized layer: 0.5, 10, 15, 21, 28, 33, 40, 45, 52, 59; the ordinate Y is the filtered current parameter: 0.5286, 6.1857, 10.7714, 13.7, 17.6857, 20.0857, 22.8286, 25.1714, 26.8285, 28.1143, 28.9714. In the command window, input:
>>load x.txt
>>load y.txt
>>cftool
Running a command, opening a curve fitting tool box, selecting a function type Custom Equation, and manually adding ExpDecay a function model, wherein the equation is as follows: f (x) =a+b×exp (- (x-c)/d). Fitting the removal data according to ExpDecay's 1 function, determines a, b, c, d values as: a=34.85; b= -45.41; c= -10.36 d= 33.07. Substituting coefficients into the model can remove the parameter determination model, and the expression is as follows: i=34.85 to 45.41e (-(d+10.36)/33.07) (where I represents a current parameter and d represents a sulfide layer thickness);
The value of the decision coefficient R-square of the fitting is 0.992, and the fitting degree is excellent. (the determination coefficient is also called as the goodness of fit, the statistic ranges from 0 to 1, the closer to 1, the better the goodness of fit of the model), the model curve is determined by removing the parameters, and is shown in figure 4.
3. Substituting the thickness of the vulcanized layer measured in the step 1 into the removal parameter determination model obtained in the step 2, and obtaining corresponding removal parameters. In practical application, the thickness d of the sulfide layer on the surface of the sample is measured only from the blade of the compressor of the helicopter engine containing the sulfide corrosion layer; the measured thickness d of the vulcanized layer is substituted into the removal parameter determination model provided by the invention, so that the removal parameters can be obtained, and cathode arc spots with different current parameters are selected according to the removal parameters, thereby achieving the purpose of removing the vulcanized corrosion layer, and enabling the surface roughness of the sample subjected to the removal process to meet the use requirement of the surface of the compressor blade. Convenient operation, the practicality is strong, and efficiency is higher.
Claims (3)
1. A method for removing sulfide corrosion layers on the surface of a blade by utilizing arc plasma is characterized by comprising the following steps:
step 1: determination of the thickness of the vulcanized layer
Measuring the thickness d of the surface sulfidation layer from the helicopter engine compressor blade containing the sulfidation corrosion layer;
Step 2: creation of removal parameter determination model
2A, evaporating a vulcanized layer with h1 thickness in a single arc spot range of the sample by using an arc spot plasma device, wherein the optimal current parameter is I h1; different sulfide layer thicknesses are adjusted to obtain corresponding optimal current parameters;
2b, taking the thickness of a vulcanized layer and the optimal current parameter under the thickness as a group of removal parameters, importing a plurality of groups of removal parameter data into origin Pro software, taking the thickness of the vulcanized layer as an X axis, taking the corresponding optimal current parameter as a Y axis, and carrying out data processing through the origin Pro software;
2c, importing the data processed by the origin Pro software into a working catalog of Matlab software, wherein the abscissa X is the thickness of a vulcanized layer, and the ordinate Y is the current parameter after filtering; in the command window, input:
＞＞loadx.txt
＞＞loady.txt
＞＞cftool
Running a command, opening a curve fitting tool box, selecting a function type CustomEquation, and manually adding ExpDecay a function model, wherein the equation is as follows: f (x) =a+b×exp (- (x-c)/d); fitting the removal data according to ExpDecay1 functions, determining the value of a, b, c, d in the equation, and substituting the value into the function model to obtain a removal parameter determination model;
Step 3: substituting the thickness of the vulcanized layer measured in the step 1 into the removal parameter determination model obtained in the step 2 to obtain corresponding removal parameters;
in the step 1, when the thickness of the vulcanized layer is measured, a section perpendicular to the vulcanized layer is taken as a detection surface, and the difference value between the position where the vulcanized layer starts to be generated on the surface of the substrate and the position where the vulcanized layer ends is taken as a measured value d of the thickness of the vulcanized layer;
In step 2a, the optimal current parameter refers to an experiment that arc spot plasma is performed on samples with different sulfide layer thicknesses by using an arc spot plasma device to remove the surface sulfide layer successfully, and the surface roughness of the treated samples is less than ra=3.0 and meets the use requirement of the surface of the compressor blade.
2. The method according to claim 1, characterized in that:
in the step 2a, when the thickness of the vulcanized layer is adjusted, the adjusting range of the thickness of the vulcanized layer is 5-59 mu m, 10-15 different thickness values are taken in the range, and the different thickness values are changed in a gradient manner.
3. The method according to claim 1, characterized in that:
In the step 2b, the data processing is to import a plurality of groups of removal parameter data into the origin Pro software, and the thickness of the vulcanized layer is taken as an X axis, and the corresponding optimal current parameter is taken as a Y axis; selecting data, and clicking in sequence: the Plot-Line, obtain the Line graph; clicking in sequence: data-Remove Bad Data Points, eliminating abnormal Data; clicking in sequence: analysis-Signal
Processing-smoothening-Open dialog, open a smooth options dialog. The Recalculate option in the dialog is set to: audo, the filtering method is set as follows: the Savitzky-Golay, points ofWindow option parameter sets to: and 5, clicking OK, and performing filtering processing to obtain the abnormal data elimination and the curve data after the filtering processing.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008034324A (en) * | 2006-08-01 | 2008-02-14 | Canon Inc | Ion beam processing method and ion beam processing device |
| CN105973916A (en) * | 2016-04-26 | 2016-09-28 | 中国兵器工业集团第五三研究所 | Making method of penetration curve for composite material X-ray digital imaging detection |
| CN106855895A (en) * | 2016-07-25 | 2017-06-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of complex-curved removal function computational methods based on ion beam technology |
| CN109623560A (en) * | 2018-12-14 | 2019-04-16 | 中国兵器科学研究院宁波分院 | The method of determination ion beam polishing process parameter for six axis movement polishing system |
-
2020
- 2020-08-20 CN CN202010841593.XA patent/CN112257219B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008034324A (en) * | 2006-08-01 | 2008-02-14 | Canon Inc | Ion beam processing method and ion beam processing device |
| CN105973916A (en) * | 2016-04-26 | 2016-09-28 | 中国兵器工业集团第五三研究所 | Making method of penetration curve for composite material X-ray digital imaging detection |
| CN106855895A (en) * | 2016-07-25 | 2017-06-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of complex-curved removal function computational methods based on ion beam technology |
| CN109623560A (en) * | 2018-12-14 | 2019-04-16 | 中国兵器科学研究院宁波分院 | The method of determination ion beam polishing process parameter for six axis movement polishing system |
Non-Patent Citations (3)
| Title |
|---|
| FV(520)B不锈钢硫化腐蚀与去除研究;郎经纬;硕士学位论文;20170212;全文 * |
| 叶片表面硫化腐蚀层弧斑低温等离子体去除;郎经纬;杜晓东;陈丰君;詹马骥;王夫成;周丹;刘光复;;中国表面工程;20160620(03);全文 * |
| 离心压缩机叶片变性层对再制造的影响及去除研究;陈丰君;硕士学位论文;20160504;全文 * |
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