CN105423891A - Detection method for thickness of aluminium-silicon infiltration layer of blade surface - Google Patents
Detection method for thickness of aluminium-silicon infiltration layer of blade surface Download PDFInfo
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- CN105423891A CN105423891A CN201510824889.XA CN201510824889A CN105423891A CN 105423891 A CN105423891 A CN 105423891A CN 201510824889 A CN201510824889 A CN 201510824889A CN 105423891 A CN105423891 A CN 105423891A
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- infiltration layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
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Abstract
The invention relates to a detection method for the thickness of an aluminium-silicon infiltration layer of a blade surface. A pyroelectric detection device for carrying out infiltration layer thickness measurement consists of a cold end probe, a hot end probe, a temperature control device, an electric potential indicating device, an adjusting device and a power supply display device. When the cold end probe and the hot end probe are not in contact with a part, the thermoelectric force value is ''0''; if deviation exists, a zero-adjusting knob is used for carrying out adjustment; and the electric potential indicating device can measure the thermoelectric force value of the part and indicate the value, wherein value of the thermoelectric force value reflects thickness information of the deep layer. Three standard test pieces are manufactured and are used for determining whether the thickness of the infiltration layer of the blade surface is qualified or not. The detection method has the following advantages: nondestructive measurement of the thickness of the aluminium-silicon infiltration layer of the turbine blade surface can be realized; during detection, the performance and the appearance dimension of the blade are not damaged; the detection result is accurate; the efficiency is high; and the product quality and safety can be guaranteed well.
Description
Technical field
The present invention relates to aviation part field of non destructive testing, particularly a kind of detection method of blade surface aluminum silicon infiltration layer thickness.
Background technology
Engine turbine blade working is in high temperature, hyperbaric environment, the aluminum silicon infiltration layer on its surface is subject to high-temperature high-pressure air flow erosion will be thinning or come off, affect the usability of blade, the thickness of suitable lossless detection method to aluminum silicon infiltration layer should be adopted during engine overhaul to detect for this reason, the underproof part of Timeliness coverage, ensures engine operation safety.Do not detect the lossless detection method of aluminum silicon infiltration layer thickness at present.
Summary of the invention
The object of the invention is the Non-Destructive Testing problem in order to solve blade surface aluminum silicon infiltration layer thickness, spy provides a kind of detection method of blade surface aluminum silicon infiltration layer thickness.
The invention provides a kind of detection method of blade surface aluminum silicon infiltration layer thickness, it is characterized in that: the detection method of described blade surface aluminum silicon infiltration layer thickness, the thermoelectricity pick-up unit carrying out alloying layer thickness measurement is made up of cold junction probe, hot junction probe, attemperating unit, electromotive force indicating device, balancing controls and power supply display device; After energising, the resistance in the probe of hot junction produces heat, and the temperature keeping hot junction to pop one's head in by attemperating unit is at 340 DEG C; Cool and heat ends pop one's head in non-contact part time, thermoelectrical potential value should be " 0 ", if there is deviation, adopt zeroing knob adjust; By hot junction probe placement at the tested position of part, parts locally temperature raises, now thermoelectrical potential will be had to produce at the tested position of part, by cold junction probe placement another position at part, pop one's head in by part conducting with hot junction, then electromotive force indicating device can measure the thermoelectrical potential value on part, and is indicated; The size of thermoelectrical potential value reflects the thickness information of deep layer;
The material identical with seized part is adopted to make the aluminum silicon infiltration layer test piece of different-thickness, accurately measure the one-tenth-value thickness 1/10 of infiltration layer under the microscope, then adopt thermoelectricity pick-up unit to measure successively, draw the corresponding relation curve of thermoelectrical potential value and aluminum silicon infiltration layer thickness, set up coordinate curve; When measuring part aluminum silicon infiltration layer, the thickness of corresponding actual aluminum silicon infiltration layer directly can be found from coordinate curve by the thermoelectrical potential value measured;
Adopt the material identical with seized part to make three standard test pieces in addition, test piece 1 is naked without infiltration layer, and in test piece 2, preparation allows the aluminum silicon infiltration layer of minimum thickness, the maximum gauge aluminum silicon infiltration layer of permission prepared by test piece 3; These three test pieces are for determining the foundation that whether qualified blade surface alloying layer thickness is.
Adopt the embodiment of thermo-electric method detection blade surface aluminum silicon infiltration layer thickness as follows:
1. prepare before inspection: tested blade is removed the foreign material such as carbon distribution, oxide skin, dust, lubricating oil and moisture; Ensure that thermoelectricity pick-up unit, infiltration layer standard test piece are consistent with ambient temperature with the temperature of tested blade; The standard test piece of adjusting instrument will be deposited separately, ensures not make aluminising silicon layer damage and ensure blade cleaning; In instrument use procedure, the thermode of contact should be inserted in its socket, does not directly contact desktop, and the temperature of thermode can reach 340 DEG C, avoids scalding; Power-on, connect instrument, by instrument preheating 10 minutes, during preheating, the hot junction of thermoelectrometry apparatus should be inserted in its socket;
2. adjustment at zero point: before detection, adjustment instrument zero knob, making electromotive force be device display data is zero;
3. instrument calibration: thermoelectricity detects control sample and should be three standard test pieces, test piece one is without infiltration layer, and test piece two is with the minimum thickness infiltration layer allowed, and test piece three is with the maximum gauge infiltration layer allowed; Thermoelectrometry apparatus hot junction and cold junction are placed on respectively the detected district of three test pieces, observe and record the thermoelectrical potential value of thermoelectrometry apparatus dial plate, setting up linear relationship, as the judgment basis that whether qualified aluminum silicon infiltration layer thickness is;
4. check: at tested blade blade surface inspection, spacing is 5mm, during inspection, hot junction probe ensures vertical with tested surface as far as possible, when thermoelectrical potential reading is more than or equal to the reading of test piece two, illustrates that the infiltration layer of blade surface is crossed thin or without infiltration layer, defective; When thermoelectricity reading is less than the reading of test piece two and is greater than the reading of test piece three, illustrate that infiltration layer is in qualified district, qualified; When thermoelectricity reading is less than the reading of test piece three, illustrate that alloying layer thickness exceeds standard, part is defective;
Points for attention: continuous working checked the correctness of debugging every 15 ~ 20 minutes, if drift appears in data, the blade detected after this time debugging to debugging last time should reexamine;
5. record: after test ending, is recorded in assay in special minute book;
6. aftertreatment is checked: close instrument and power supply, keep instrument and control sample well.
Advantage of the present invention:
The detection method of blade surface aluminum silicon infiltration layer thickness of the present invention, the nondestructive measurement to turbine blade surface aluminum silicon infiltration layer thickness can be realized, the not performance of damaged blade and apparent size during detection, testing result is accurate, efficiency is high, has vital role to guarantee product quality and safety.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is thermoelectricity Cleaning Principle;
Fig. 2 is thermoelectricity pick-up unit;
In figure, 1-zeroing knob, the instruction of 2-power supply, 3-cold junction probe, 4-thermoelectrical potential value, 5-probe interface, 6-hot junction probe, 7-blade.
Embodiment
Embodiment 1
The invention provides a kind of detection method of blade surface aluminum silicon infiltration layer thickness, it is characterized in that: the detection method of described blade surface aluminum silicon infiltration layer thickness, the thermoelectricity pick-up unit carrying out alloying layer thickness measurement is made up of cold junction probe, hot junction probe, attemperating unit, electromotive force indicating device, balancing controls and power supply display device; After energising, the resistance in the probe of hot junction produces heat, and the temperature keeping hot junction to pop one's head in by attemperating unit is at 340 DEG C; Cool and heat ends pop one's head in non-contact part time, thermoelectrical potential value should be " 0 ", if there is deviation, adopt zeroing knob adjust; By hot junction probe placement at the tested position of part, parts locally temperature raises, now thermoelectrical potential will be had to produce at the tested position of part, by cold junction probe placement another position at part, pop one's head in by part conducting with hot junction, then electromotive force indicating device can measure the thermoelectrical potential value on part, and is indicated; The size of thermoelectrical potential value reflects the thickness information of deep layer;
The material identical with seized part is adopted to make the aluminum silicon infiltration layer test piece of different-thickness, accurately measure the one-tenth-value thickness 1/10 of infiltration layer under the microscope, then adopt thermoelectricity pick-up unit to measure successively, draw the corresponding relation curve of thermoelectrical potential value and aluminum silicon infiltration layer thickness, set up coordinate curve; When measuring part aluminum silicon infiltration layer, the thickness of corresponding actual aluminum silicon infiltration layer directly can be found from coordinate curve by the thermoelectrical potential value measured;
Adopt the material identical with seized part to make three standard test pieces in addition, test piece 1 is naked without infiltration layer, and in test piece 2, preparation allows the aluminum silicon infiltration layer of minimum thickness, the maximum gauge aluminum silicon infiltration layer of permission prepared by test piece 3; These three test pieces are for determining the foundation that whether qualified blade surface alloying layer thickness is.
Adopt the embodiment of thermo-electric method detection blade surface aluminum silicon infiltration layer thickness as follows:
1. prepare before inspection: tested blade is removed the foreign material such as carbon distribution, oxide skin, dust, lubricating oil and moisture; Ensure that thermoelectricity pick-up unit, infiltration layer standard test piece are consistent with ambient temperature with the temperature of tested blade; The standard test piece of adjusting instrument will be deposited separately, ensures not make aluminising silicon layer damage and ensure blade cleaning; In instrument use procedure, the thermode of contact should be inserted in its socket, does not directly contact desktop, and the temperature of thermode can reach 340 DEG C, avoids scalding; Power-on, connect instrument, by instrument preheating 10 minutes, during preheating, the hot junction of thermoelectrometry apparatus should be inserted in its socket;
2. adjustment at zero point: before detection, adjustment instrument zero knob, making electromotive force be device display data is zero;
3. instrument calibration: thermoelectricity detects control sample and should be three standard test pieces, test piece one is without infiltration layer, and test piece two is with the minimum thickness infiltration layer allowed, and test piece three is with the maximum gauge infiltration layer allowed; Thermoelectrometry apparatus hot junction and cold junction are placed on respectively the detected district of three test pieces, observe and record the thermoelectrical potential value of thermoelectrometry apparatus dial plate, setting up linear relationship, as the judgment basis that whether qualified aluminum silicon infiltration layer thickness is;
4. check: at tested blade blade surface inspection, spacing is 5mm, during inspection, hot junction probe ensures vertical with tested surface as far as possible, when thermoelectrical potential reading is more than or equal to the reading of test piece two, illustrates that the infiltration layer of blade surface is crossed thin or without infiltration layer, defective; When thermoelectricity reading is less than the reading of test piece two and is greater than the reading of test piece three, illustrate that infiltration layer is in qualified district, qualified; When thermoelectricity reading is less than the reading of test piece three, illustrate that alloying layer thickness exceeds standard, part is defective;
Points for attention: continuous working checked the correctness of debugging every 15 ~ 20 minutes, if drift appears in data, the blade detected after this time debugging to debugging last time should reexamine;
5. record: after test ending, is recorded in assay in special minute book;
6. aftertreatment is checked: close instrument and power supply, keep instrument and control sample well.
Claims (2)
1. the detection method of a blade surface aluminum silicon infiltration layer thickness, it is characterized in that: the detection method of described blade surface aluminum silicon infiltration layer thickness, the thermoelectricity pick-up unit carrying out alloying layer thickness measurement is made up of cold junction probe, hot junction probe, attemperating unit, electromotive force indicating device, balancing controls and power supply display device; After energising, the resistance in the probe of hot junction produces heat, and the temperature keeping hot junction to pop one's head in by attemperating unit is at 340 DEG C; Cool and heat ends pop one's head in non-contact part time, thermoelectrical potential value should be " 0 ", if there is deviation, adopt zeroing knob adjust; By hot junction probe placement at the tested position of part, parts locally temperature raises, now thermoelectrical potential will be had to produce at the tested position of part, by cold junction probe placement another position at part, pop one's head in by part conducting with hot junction, then electromotive force indicating device can measure the thermoelectrical potential value on part, and is indicated; The size of thermoelectrical potential value reflects the thickness information of deep layer;
The material identical with seized part is adopted to make the aluminum silicon infiltration layer test piece of different-thickness, accurately measure the one-tenth-value thickness 1/10 of infiltration layer under the microscope, then adopt thermoelectricity pick-up unit to measure successively, draw the corresponding relation curve of thermoelectrical potential value and aluminum silicon infiltration layer thickness, set up coordinate curve; When measuring part aluminum silicon infiltration layer, the thickness of corresponding actual aluminum silicon infiltration layer directly can be found from coordinate curve by the thermoelectrical potential value measured;
Adopt the material identical with seized part to make three standard test pieces in addition, test piece 1 is naked without infiltration layer, and in test piece 2, preparation allows the aluminum silicon infiltration layer of minimum thickness, the maximum gauge aluminum silicon infiltration layer of permission prepared by test piece 3; These three test pieces are for determining the foundation that whether qualified blade surface alloying layer thickness is.
2. according to the detection method of blade surface aluminum silicon infiltration layer thickness according to claim 1, it is characterized in that: adopt the embodiment of thermo-electric method detection blade surface aluminum silicon infiltration layer thickness as follows:
1. prepare before inspection: tested blade is removed the foreign material such as carbon distribution, oxide skin, dust, lubricating oil and moisture; Ensure that thermoelectricity pick-up unit, infiltration layer standard test piece are consistent with ambient temperature with the temperature of tested blade; The standard test piece of adjusting instrument will be deposited separately, ensures not make aluminising silicon layer damage and ensure blade cleaning; In instrument use procedure, the thermode of contact should be inserted in its socket, does not directly contact desktop, and the temperature of thermode can reach 340 DEG C, avoids scalding; Power-on, connect instrument, by instrument preheating 10 minutes, during preheating, the hot junction of thermoelectrometry apparatus should be inserted in its socket;
2. adjustment at zero point: before detection, adjustment instrument zero knob, making electromotive force be device display data is zero;
3. instrument calibration: thermoelectricity detects control sample and should be three standard test pieces, test piece one is without infiltration layer, and test piece two is with the minimum thickness infiltration layer allowed, and test piece three is with the maximum gauge infiltration layer allowed; Thermoelectrometry apparatus hot junction and cold junction are placed on respectively the detected district of three test pieces, observe and record the thermoelectrical potential value of thermoelectrometry apparatus dial plate, setting up linear relationship, as the judgment basis that whether qualified aluminum silicon infiltration layer thickness is;
4. check: at tested blade blade surface inspection, spacing is 5mm, during inspection, hot junction probe ensures vertical with tested surface as far as possible, when thermoelectrical potential reading is more than or equal to the reading of test piece two, illustrates that the infiltration layer of blade surface is crossed thin or without infiltration layer, defective; When thermoelectricity reading is less than the reading of test piece two and is greater than the reading of test piece three, illustrate that infiltration layer is in qualified district, qualified; When thermoelectricity reading is less than the reading of test piece three, illustrate that alloying layer thickness exceeds standard, part is defective;
Points for attention: continuous working checked the correctness of debugging every 15 ~ 20 minutes, if drift appears in data, the blade detected after this time debugging to debugging last time should reexamine;
5. record: after test ending, is recorded in assay in special minute book;
6. aftertreatment is checked: close instrument and power supply, keep instrument and control sample well.
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| CN201510824889.XA CN105423891B (en) | 2015-11-24 | 2015-11-24 | A kind of detection method of blade surface aluminum silicon infiltration layer thickness |
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| CN201510824889.XA CN105423891B (en) | 2015-11-24 | 2015-11-24 | A kind of detection method of blade surface aluminum silicon infiltration layer thickness |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596638A (en) * | 2016-11-18 | 2017-04-26 | 西安琦丰光电科技有限公司 | Nondestructive testing apparatus and method for infiltrated layer on surface of dissimilar metal |
| CN108106585A (en) * | 2017-12-21 | 2018-06-01 | 爱德森（厦门）电子有限公司 | A kind of detection device and method of metallic substrate surface coating |
| CN111238358A (en) * | 2020-02-25 | 2020-06-05 | 山东大学 | Resistance value test-based cutter coating thickness measuring electrode, device and method |
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| CN103363930A (en) * | 2013-07-02 | 2013-10-23 | 首钢总公司 | Method for measuring thickness of galvanized layer on steel plate |
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Patent Citations (5)
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|---|---|---|---|---|
| CN101451817A (en) * | 2008-12-29 | 2009-06-10 | 国营红阳机械厂 | Non-metal coating thickness detecting method on metal base |
| US20120119622A1 (en) * | 2010-07-21 | 2012-05-17 | General Electric Company | Device for measuring material thickness |
| CN102243116A (en) * | 2011-04-15 | 2011-11-16 | 南京航空航天大学 | Method and device for quickly detecting thermoelectric properties of polycrystalline diamond (PCD) blade |
| CN102494644A (en) * | 2011-11-14 | 2012-06-13 | 湖南省湘电锅炉压力容器检验中心有限公司 | Method for simply detecting thickness of silver coating of high-voltage isolating switch contact |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596638A (en) * | 2016-11-18 | 2017-04-26 | 西安琦丰光电科技有限公司 | Nondestructive testing apparatus and method for infiltrated layer on surface of dissimilar metal |
| CN106596638B (en) * | 2016-11-18 | 2018-12-11 | 西安琦丰光电科技有限公司 | A kind of dissimilar metal surface infiltration layer non-destructive testing device and detection method |
| CN108106585A (en) * | 2017-12-21 | 2018-06-01 | 爱德森（厦门）电子有限公司 | A kind of detection device and method of metallic substrate surface coating |
| CN111238358A (en) * | 2020-02-25 | 2020-06-05 | 山东大学 | Resistance value test-based cutter coating thickness measuring electrode, device and method |
| CN111238358B (en) * | 2020-02-25 | 2021-06-04 | 山东大学 | Resistance value test-based cutter coating thickness measuring electrode, device and method |
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| CN105423891B (en) | 2019-02-05 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |