CN109959705A - Coated eddy current testing reference block and manufacturing method thereof - Google Patents
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- 238000012360 testing method Methods 0.000 title claims abstract description 97
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000741 silica gel Substances 0.000 claims abstract description 14
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000003754 machining Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 15
- 239000011259 mixed solution Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 9
- 239000012720 thermal barrier coating Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 238000007689 inspection Methods 0.000 abstract description 8
- 238000010892 electric spark Methods 0.000 abstract description 5
- 238000009659 non-destructive testing Methods 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000011049 filling Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000003064 anti-oxidating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
本发明公开了一种带涂层涡流检测对比试块及其制作方法，属于无损检测领域。该涡流检测试块包括：基体、涂层以及若干矩形槽；试块涂层喷涂在基体表面；若干矩形槽开设在基体表面。该试块的制作方法包括：制备试块基体；利用电火花在基体表面加工若干矩形槽；若干矩形槽内填充氧化铝粉和硅胶混合液，至矩形槽填充平为止，并干燥、焙烧；试块基体表面喷涂涂层。本发明能有效地模拟被检件真实裂纹的大小；涡流检测用的试块与被检件的材质、热处理状态及表面状态基本一致，其上有不同尺寸矩形槽，能有效用于设定检验灵敏度、评定裂纹的大小和位置。
The invention discloses a coated eddy current detection comparison test block and a manufacturing method thereof, belonging to the field of non-destructive testing. The eddy current detection test block comprises: a base body, a coating and a plurality of rectangular grooves; the coating of the test block is sprayed on the surface of the base body; and a plurality of rectangular grooves are opened on the surface of the base body. The preparation method of the test block includes: preparing a test block base; machining a plurality of rectangular grooves on the surface of the base by using electric sparks; filling the plurality of rectangular grooves with a mixture of alumina powder and silica gel until the rectangular grooves are filled flat, and drying and calcining; The surface of the block substrate is sprayed with a coating. The invention can effectively simulate the size of the real crack of the inspected part; the material, heat treatment state and surface state of the test block used for eddy current inspection are basically the same as the inspected part, and there are rectangular grooves of different sizes on it, which can be effectively used for setting inspection. Sensitivity, assessment of crack size and location.
Description
技术领域technical field
本发明属于涡流检测技术领域，具体涉及一种带涂层涡流检测对比试块及其制作方法。The invention belongs to the technical field of eddy current detection, and in particular relates to a coated eddy current detection comparison test block and a manufacturing method thereof.
背景技术Background technique
航空发动机和工业燃气轮机高温部件由具有优异高温力学性能和抗氧化腐蚀能力的高温合金制成，表面喷涂有热障涂层(Thermal Barrier Coatings，TBCs)或抗氧化涂层(Anti-Oxidation Coating，AOC)，以进一步提高部件使用温度、延长服役寿命。由于高温部件工作环境恶劣，服役过程中基体易萌生裂纹，危及燃气轮机的安全运行。因此，为保证航空发动机和工业燃气轮机的安全可靠工作，对高温部件基体裂纹进行无损检测与评估是非常必要的。Aero-engine and industrial gas turbine high-temperature components are made of high-temperature alloys with excellent high-temperature mechanical properties and oxidation corrosion resistance, and the surface is sprayed with thermal barrier coatings (Thermal Barrier Coatings, TBCs) or anti-oxidation coatings (Anti-Oxidation Coating, AOC) ) to further increase the operating temperature of components and prolong their service life. Due to the harsh working environment of high-temperature components, the substrate is prone to cracks during service, which endangers the safe operation of the gas turbine. Therefore, in order to ensure the safe and reliable operation of aero-engines and industrial gas turbines, it is very necessary to conduct non-destructive testing and evaluation of matrix cracks in high-temperature components.
涡流检测技术作为五大常规无损检测技术之一，对被检工件表面或近表面裂纹缺陷很灵敏，是进行高温部件基体裂纹检测的有效方法。涡流检测试块是涡流检测系统的重要组成部分，是确定涡流检测灵敏度、衡量涡流有效性、判定缺陷性质和大小的重要工具。目前，国内外涡流检测用的试块均采用在表面用电火花或激光的加工方法刻槽、打孔，模拟自然缺陷。这种对比试块适用于被检工件表面缺陷的检查和对比，不适用带涂层高温部件基体涡流检测灵敏度、裂纹位置和尺寸的评判。Eddy current testing technology, as one of the five conventional nondestructive testing technologies, is very sensitive to the surface or near-surface crack defects of the workpiece to be inspected, and is an effective method to detect the matrix cracks of high temperature components. The eddy current test block is an important part of the eddy current testing system, and it is an important tool to determine the sensitivity of eddy current testing, measure the effectiveness of eddy current, and determine the nature and size of defects. At present, the test blocks used for eddy current testing at home and abroad are all grooved and punched on the surface by EDM or laser processing to simulate natural defects. This kind of comparison test block is suitable for the inspection and comparison of surface defects of the inspected workpiece, and is not suitable for the evaluation of the eddy current detection sensitivity, crack position and size of the coated high-temperature components.
发明内容SUMMARY OF THE INVENTION
本发明的目的是提供一种带涂层涡流检测对比试块及其制作方法，用于模拟被检工件中真实裂纹的大小，调节涡流检测仪检测灵敏度、保证检测结果准确性、判定和比较被检件中裂纹大小和位置。The purpose of the present invention is to provide a coated eddy current detection comparison test block and its production method, which are used to simulate the size of the real crack in the tested workpiece, adjust the detection sensitivity of the eddy current detector, ensure the accuracy of the detection results, determine and compare the The size and location of cracks in the test piece.
为达到上述目的，本发明采用如下技术方案来实现的：To achieve the above object, the present invention adopts the following technical solutions to realize:
一种带涂层涡流检测对比试块，包括自下而上依次设置的基体和涂层；其中，A coated eddy current detection comparison test block, comprising a base body and a coating layer arranged in sequence from bottom to top; wherein,
基体与被检工件基体材质、热处理状态一致；涂层为TBCs或AOC，TBCs由粘结层和陶瓷层双层结构组成；涂层的材质、喷涂工艺、表面状态与被检工件一致；涂层喷涂在基体表面；基体表面上开设有若干矩形槽。The substrate is consistent with the substrate material and heat treatment state of the workpiece to be inspected; the coating is TBCs or AOC, and TBCs is composed of a double-layer structure of an adhesive layer and a ceramic layer; the material, spraying process, and surface state of the coating are consistent with the workpiece to be inspected; the coating It is sprayed on the surface of the base body; a number of rectangular grooves are opened on the surface of the base body.
本发明进一步的改进在于，若干矩形槽内均填充有氧化铝粉和硅胶混合液，且氧化铝粉和硅胶混合液体积比为1：2～1：5。A further improvement of the present invention lies in that several rectangular grooves are filled with a mixed solution of alumina powder and silica gel, and the volume ratio of alumina powder and silica gel mixed solution is 1:2 to 1:5.
本发明进一步的改进在于，氧化铝粉的粒径小于等于20μm。A further improvement of the present invention is that the particle size of the alumina powder is less than or equal to 20 μm.
本发明进一步的改进在于，基体的厚度为10±0.5mm。A further improvement of the present invention is that the thickness of the base body is 10±0.5mm.
本发明进一步的改进在于，若干矩形槽分别为第一矩形槽至第七矩形槽的宽度为0.1±0.02mm，长度为20±0.1mm；第一矩形槽至第五矩形槽的深度分别为0.1±0.02mm、0.2±0.02mm、0.5±0.02mm、1±0.02mm、2±0.02mm，第六矩形槽和第七矩形槽的深度为0.5±0.02mm。A further improvement of the present invention is that the width of the plurality of rectangular grooves is 0.1±0.02mm and the length of the first rectangular groove to the seventh rectangular groove respectively is 0.1±0.02mm, and the length is 20±0.1mm; the depth of the first rectangular groove to the fifth rectangular groove is 0.1 ±0.02mm, 0.2±0.02mm, 0.5±0.02mm, 1±0.02mm, 2±0.02mm, and the depths of the sixth and seventh rectangular grooves are 0.5±0.02mm.
本发明进一步的改进在于，第一矩形槽至第四矩形槽距试块边缘25±0.5mm，相邻矩形槽间距为25±0.5mm；第四矩形槽和第五矩形槽之间间距为25±0.5mm，第五矩形槽距试块边缘25±0.5mm；第五矩形槽至第七矩形槽相邻之间间距为25±0.5mm，第六矩形槽与试块边缘相连接，第七矩形槽距试块边缘5±0.5mm。A further improvement of the present invention is that the distance from the first rectangular groove to the fourth rectangular groove is 25±0.5mm from the edge of the test block, the distance between adjacent rectangular grooves is 25±0.5mm; the distance between the fourth rectangular groove and the fifth rectangular groove is 25±0.5mm ±0.5mm, the fifth rectangular slot is 25±0.5mm from the edge of the test block; the distance between the fifth rectangular slot and the seventh rectangular slot is 25±0.5mm, the sixth rectangular slot is connected to the edge of the test block, and the seventh rectangular slot is connected to the edge of the test block. The rectangular slot is 5±0.5mm from the edge of the test block.
一种带涂层涡流检测对比试块的制作方法，该方法基于上述一种带涂层涡流检测对比试块，包括以下步骤：A method for making a coated eddy current detection comparison test block, the method is based on the above-mentioned coated eddy current detection comparison test block, comprising the following steps:
第一步：制备与被检工件基体材质、热处理状态一致的试块基体；The first step: prepare a test block base that is consistent with the base material and heat treatment state of the workpiece to be inspected;
第二步：利用电火花加工方法在基体表面加工若干矩形槽；The second step: machining a number of rectangular grooves on the surface of the substrate by means of EDM;
第三步：若干矩形槽内填充氧化铝粉和硅胶混合液，并干燥；Step 3: Fill several rectangular tanks with a mixture of alumina powder and silica gel and dry them;
第四步：重复第三步，直至矩形槽填充平；Step 4: Repeat step 3 until the rectangular slot is filled flat;
第五步：高温炉内800～900℃焙烧2h；The fifth step: roasting at 800-900℃ for 2h in a high-temperature furnace;
第六步：基体表面喷涂涂层，得到带涂层涡流检测对比试块。The sixth step: spray coating on the surface of the substrate to obtain a comparison test block for eddy current testing with coating.
本发明进一步的改进在于，第二步中，若干矩形槽采用电火花加工而成。A further improvement of the present invention is that, in the second step, several rectangular grooves are formed by EDM.
本发明进一步的改进在于，第三步中，矩形槽内每次填充的氧化铝粉和硅胶混合液厚度小于0.1mm。A further improvement of the present invention is that, in the third step, the thickness of the alumina powder and silica gel mixed solution filled in the rectangular groove is less than 0.1 mm each time.
本发明具有如下有益的技术效果：The present invention has following beneficial technical effect:
1、本发明能有效地模拟被检工件真实裂纹的大小；1. The present invention can effectively simulate the real crack size of the workpiece under inspection;
2、带涂层涡流检测对比试块基体与被检件的材质、热处理状态基本一致，涂层的材质、喷涂工艺、表面状态与被检工件基本一致；2. The material and heat treatment state of the test block and the test piece are basically the same for the coated eddy current test, and the material, spraying process and surface state of the coating are basically the same as those of the test piece;
3、试块涂层表面平整，对涡流检测结果影响小；3. The surface of the test block coating is smooth, which has little influence on the eddy current test results;
4、带涂层对比试块刻有不同尺寸的矩形槽，能有效用于设定检测灵敏度和评估裂纹的尺寸和位置；4. The coated reference block is engraved with rectangular grooves of different sizes, which can be effectively used to set the detection sensitivity and evaluate the size and location of cracks;
5、所用氧化铝粉和硅胶均为常见材料或试剂，本领域普通技术人员都能够较为方便地获得。5. The alumina powder and silica gel used are common materials or reagents, which can be easily obtained by those of ordinary skill in the art.
附图说明Description of drawings
图1为本发明一种带涂层涡流检测对比试块结构示意图。FIG. 1 is a schematic structural diagram of a coated eddy current detection comparison test block according to the present invention.
图中：1-基体，2-涂层，3～9-第一矩形槽至第七矩形槽。In the figure: 1-substrate, 2-coating, 3-9-the first rectangular groove to the seventh rectangular groove.
具体实施方式Detailed ways
以下结合附图对本发明做出进一步的说明。The present invention will be further described below with reference to the accompanying drawings.
实施例1Example 1
如图1所示，一种用于涡流检测的带涂层对比试块，其包括：基体1、涂层2以及第一矩形槽至第七矩形槽3～9；所述矩形槽设置在基体1表面。As shown in FIG. 1, a coated comparative test block for eddy current testing includes: a base body 1, a coating layer 2, and first to seventh rectangular grooves 3-9; the rectangular grooves are arranged on the base body 1 surface.
本实施例具体可以这样实现：This embodiment can be specifically implemented as follows:
1)依据被检工件的基体材质选取涡流检测对比试块的基体材料，要求涡流检测对比试块的基体材料牌号、热处理状态与被检工件的被检部位一致；1) Select the base material of the eddy current test comparison test block according to the base material of the tested workpiece, and require that the base material grade and heat treatment state of the eddy current test comparative test block are consistent with the tested part of the tested workpiece;
2)利用电火花在基体1表面加工第一矩形槽至第七矩形槽3～9；2) Machining the first rectangular grooves to the seventh rectangular grooves 3-9 on the surface of the base body 1 by using an electric spark;
3)第一矩形槽至第七矩形槽3～9内填充氧化铝粉和硅胶混合液，并干燥；3) The first rectangular grooves to the seventh rectangular grooves 3-9 are filled with the mixed solution of alumina powder and silica gel, and dried;
4)重复步骤3)，直至第一矩形槽至第七矩形槽3～9填充平；4) Repeat step 3) until the first rectangular slot to the seventh rectangular slot 3-9 are filled flat;
5)高温炉内830±10℃焙烧2h；5) Roasting at 830±10℃ for 2h in a high temperature furnace;
6)在基体1表面喷涂涂层2(TBCs)，粘结层厚度为0.15±0.05mm、陶瓷层厚度为0.35±0.05mm。6) Spray coating 2 (TBCs) on the surface of substrate 1, the thickness of the adhesive layer is 0.15±0.05mm, and the thickness of the ceramic layer is 0.35±0.05mm.
应用对比试块的涡流检测过程如下：The eddy current testing process using the reference block is as follows:
1)连接涡流探头，开启涡流仪；1) Connect the eddy current probe and turn on the eddy current meter;
2)在对比试块上调试仪器灵敏度；2) Debug the sensitivity of the instrument on the comparison test block;
3)对被检件进行检测；3) Detect the inspected parts;
4)借助对比试块对被检件中的裂纹进行评定；4) Evaluate the cracks in the test piece with the help of the comparative test block;
5)检测完毕再利用对比试块校对涡流仪，如无变化，可以验收被检件，如有变化，应重新对被检件进行检测；5) After the inspection, use the comparison test block to calibrate the eddy current meter. If there is no change, the inspected part can be accepted. If there is any change, the inspected part should be re-tested;
6)关闭涡流仪。6) Turn off the vortex meter.
实施例2Example 2
如图1所示，一种用于涡流检测的带涂层对比试块，其包括：基体1、涂层2以及第一矩形槽至第七矩形槽3～9；所述矩形槽设置在基体1表面。As shown in FIG. 1, a coated comparative test block for eddy current testing includes: a base body 1, a coating layer 2, and first to seventh rectangular grooves 3-9; the rectangular grooves are arranged on the base body 1 surface.
本实施例具体可以这样实现：This embodiment can be specifically implemented as follows:
1)依据被检工件的基体材质选取涡流检测对比试块的基体材料，要求涡流检测对比试块的基体材料牌号、热处理状态与被检工件的被检部位一致；1) Select the base material of the eddy current test comparison test block according to the base material of the tested workpiece, and require that the base material grade and heat treatment state of the eddy current test comparative test block are consistent with the tested part of the tested workpiece;
2)利用电火花在基体1表面加工第一矩形槽至第七矩形槽3～9；2) Machining the first rectangular grooves to the seventh rectangular grooves 3-9 on the surface of the base body 1 by using an electric spark;
3)第一矩形槽至第七矩形槽3～9内填充氧化铝粉和硅胶混合液，并干燥；3) The first rectangular grooves to the seventh rectangular grooves 3-9 are filled with the mixed solution of alumina powder and silica gel, and dried;
4)重复步骤3)，直至第一矩形槽至第七矩形槽3～9填充平；4) Repeat step 3) until the first rectangular slot to the seventh rectangular slot 3-9 are filled flat;
5)高温炉内870±10℃焙烧2h；5) Roasting at 870±10℃ for 2h in a high temperature furnace;
6)在基体1表面喷涂涂层2(TBCs)，粘结层厚度为0.2±0.05mm、陶瓷层厚度为0.5±0.05mm。6) Spray coating 2 (TBCs) on the surface of substrate 1, the thickness of the adhesive layer is 0.2±0.05mm, and the thickness of the ceramic layer is 0.5±0.05mm.
应用对比试块的涡流检测过程如下：The eddy current testing process using the reference block is as follows:
1)连接涡流探头，开启涡流仪；1) Connect the eddy current probe and turn on the eddy current meter;
2)在对比试块上调试仪器灵敏度；2) Debug the sensitivity of the instrument on the comparison test block;
3)对被检件进行检测；3) Detect the inspected parts;
4)借助对比试块对被检件中的裂纹进行评定；4) Evaluate the cracks in the test piece with the help of the comparative test block;
5)检测完毕再采用对比试块校对涡流仪，如无变化，可以验收被检件，如有变化，应重新对被检件进行检测；5) After the inspection is completed, the eddy current meter is calibrated with the comparison test block. If there is no change, the inspected part can be accepted. If there is any change, the inspected part should be re-tested;
6)关闭涡流仪。6) Turn off the vortex meter.
实施例3Example 3
如图1所示，一种用于涡流检测的带涂层对比试块，其包括：基体1、涂层2以及第一矩形槽至第七矩形槽3～9；所述矩形槽设置在基体1表面。As shown in FIG. 1, a coated comparative test block for eddy current testing includes: a base body 1, a coating layer 2, and first to seventh rectangular grooves 3-9; the rectangular grooves are arranged on the base body 1 surface.
本实施例具体可以这样实现：This embodiment can be specifically implemented as follows:
1)依据被检工件的基体材质选取涡流检测对比试块的基体材料，要求涡流检测对比试块的基体材料牌号、热处理状态与被检工件的被检部位一致；1) Select the base material of the eddy current test comparison test block according to the base material of the tested workpiece, and require that the base material grade and heat treatment state of the eddy current test comparative test block are consistent with the tested part of the tested workpiece;
2)利用电火花在基体1表面加工第一矩形槽至第七矩形槽3～9；2) Machining the first rectangular grooves to the seventh rectangular grooves 3-9 on the surface of the base body 1 by using an electric spark;
3)第一矩形槽至第七矩形槽3～9内填充氧化铝粉和硅胶混合液，并干燥；3) The first rectangular grooves to the seventh rectangular grooves 3-9 are filled with the mixed solution of alumina powder and silica gel, and dried;
4)重复步骤3)，直至第一矩形槽至第七矩形槽3～9填充平；4) Repeat step 3) until the first rectangular slot to the seventh rectangular slot 3-9 are filled flat;
5)高温炉内830±10℃焙烧2h；5) Roasting at 830±10℃ for 2h in a high temperature furnace;
6)在基体1表面喷涂涂层2(AOC)，AOC厚度为0.35±0.05mm。6) Spray coating 2 (AOC) on the surface of substrate 1, and the thickness of AOC is 0.35±0.05mm.
应用对比试块的涡流检测过程如下：The eddy current testing process using the reference block is as follows:
1)连接涡流探头，开启涡流仪；1) Connect the eddy current probe and turn on the eddy current meter;
2)在对比试块上调试仪器灵敏度；2) Debug the sensitivity of the instrument on the comparison test block;
3)对被检件进行检测；3) Detect the inspected parts;
4)借助对比试块对被检件中的裂纹进行评定；4) Evaluate the cracks in the test piece with the help of the comparative test block;
5)检测完毕再采用对比试块校对涡流仪，如无变化，可以验收被检件，如有变化，应重新对被检件进行检测；5) After the inspection is completed, the eddy current meter is calibrated with the comparison test block. If there is no change, the inspected part can be accepted. If there is any change, the inspected part should be re-tested;
6)关闭涡流仪。6) Turn off the vortex meter.
实施例4Example 4
如图1所示，一种用于涡流检测的带涂层对比试块，其包括：基体1、涂层2以及第一矩形槽至第七矩形槽3～9；所述矩形槽设置在基体1表面。As shown in FIG. 1, a coated comparative test block for eddy current testing includes: a base body 1, a coating layer 2, and first to seventh rectangular grooves 3-9; the rectangular grooves are arranged on the base body 1 surface.
本实施例具体可以这样实现：This embodiment can be specifically implemented as follows:
1)依据被检工件的基体材质选取涡流检测对比试块的基体材料，要求涡流检测对比试块的基体材料牌号、热处理状态与被检工件的被检部位一致；1) Select the base material of the eddy current test comparison test block according to the base material of the tested workpiece, and require that the base material grade and heat treatment state of the eddy current test comparative test block are consistent with the tested part of the tested workpiece;
2)利用电火花在基体1表面加工第一矩形槽至第七矩形槽3～9；2) Machining the first rectangular grooves to the seventh rectangular grooves 3-9 on the surface of the base body 1 by using an electric spark;
3)第一矩形槽至第七矩形槽3～9内填充氧化铝粉和硅胶混合液，并干燥；3) The first rectangular grooves to the seventh rectangular grooves 3-9 are filled with the mixed solution of alumina powder and silica gel, and dried;
4)重复步骤3)，直至第一矩形槽至第七矩形槽3～9填充平；4) Repeat step 3) until the first rectangular slot to the seventh rectangular slot 3-9 are filled flat;
5)高温炉内870±10℃焙烧2h；5) Roasting at 870±10℃ for 2h in a high temperature furnace;
6)在基体1表面喷涂涂层2(AOC)，AOC厚度为0.45±0.05mm。6) Spray coating 2 (AOC) on the surface of substrate 1, and the thickness of AOC is 0.45±0.05mm.
应用对比试块的涡流检测过程如下：The eddy current testing process using the reference block is as follows:
1)连接涡流探头，开启涡流仪；1) Connect the eddy current probe and turn on the eddy current meter;
2)在对比试块上调试仪器灵敏度；2) Debug the sensitivity of the instrument on the comparison test block;
3)对被检件进行检测；3) Detect the inspected parts;
4)借助对比试块对被检件中的裂纹进行评定；4) Evaluate the cracks in the test piece with the help of the comparative test block;
5)检测完毕再采用对比试块校对涡流仪，如无变化，可以验收被检件，如有变化，应重新对被检件进行检测；5) After the inspection is completed, the eddy current meter is calibrated with the comparison test block. If there is no change, the inspected part can be accepted. If there is any change, the inspected part should be re-tested;
6)关闭涡流仪。6) Turn off the vortex meter.
上述实施例只为说明本发明的技术构思和特点，其目的在于让熟悉此项技术的人能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围内。The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with the art to understand the content of the present invention and implement accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
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