CN1134550A - Method for detecting coating quality of metal surface - Google Patents
Method for detecting coating quality of metal surface Download PDFInfo
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- CN1134550A CN1134550A CN 95110206 CN95110206A CN1134550A CN 1134550 A CN1134550 A CN 1134550A CN 95110206 CN95110206 CN 95110206 CN 95110206 A CN95110206 A CN 95110206A CN 1134550 A CN1134550 A CN 1134550A
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- 239000011248 coating agent Substances 0.000 title claims description 59
- 238000000576 coating method Methods 0.000 title claims description 59
- 239000002184 metal Substances 0.000 title claims description 24
- 229910052751 metal Inorganic materials 0.000 title claims description 24
- 238000000034 method Methods 0.000 title abstract description 36
- 238000001228 spectrum Methods 0.000 claims abstract description 26
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 239000011159 matrix material Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 3
- 230000002950 deficient Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000007542 hardness measurement Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005088 metallography Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- PPWHTZKZQNXVAE-UHFFFAOYSA-N Tetracaine hydrochloride Chemical compound Cl.CCCCNC1=CC=C(C(=O)OCCN(C)C)C=C1 PPWHTZKZQNXVAE-UHFFFAOYSA-N 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
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- 238000010892 electric spark Methods 0.000 description 1
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- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The said detecting method feature that standard pulse is applied to sample to be detected and the signal is received by acoustic emission transducer, amplified and analyzed through fast Fourier analysis to obtain freq spectrum, which is compared to known typical freq spectrum to evaluate the detected sample.
Description
The present invention relates to coating quality regulation technology, provide a kind of various metals to cross layer, the lossless detection method of nonmetallic coating and surface film quality especially metal.
The existing detection method of coating quality of metal surface:
1. weight method: the method for at present the most frequently used mensuration coating quality of metal surface is a weight method, promptly the object (sheet material/tubing and wire rod all can) that coating or surface film are arranged is claimed, use chemical method that coating (or surface film) is dissolved away then, clean, weigh again after the drying, the weight difference of front and back is exactly the weight of coating, and unit is a gram/rice
2If coating weight is positioned at critical field, then be specification product, otherwise, be substandard product, qualified standard is looked the kind of coating (or surface film), the type of parent metal, the shape of coated matrix factors such as (sheet material, tubing or wire rods) and deciding, this method is not only operated complicated, time-consuming, and error is bigger.
2. bend test method: to sheet material coating (or surface film), cut into inch strips, with sample curve 180 ° of angles around axle (its diameter is 4 times of thickness of slab), check with low power (4～10 times) whether the deformation part coating occurs and throw off or peeling phenomenon, if, the adhesion inequality of the quality of coating (surface film) and matrix thereof then.For tubing (3), because of going out sheet material, they process, and the coating quality inspection is similar to the sheet material coating.Wire rod (3) is changeed 2 circles around axle (diameter 5 times to wire rod), and velocity of rotation is no more than 15 rev/mins, can not create coating with nail, then is qualified coating, and said method all is destruction methods, and influence factor is big, very out of true.
3. microstructure method, according to the form of coated crystal, crystal development degree and compactness extent are evaluated the quality of coating, this method is suitable for the parent metal of what different shape, metal, nonmetallic coating all can, but must destroy sample, the inspection of uncomfortable what production scene.
4. hardness (or microhardness) method of testing is selected suitable hardness load, makes depth of cup be no more than coating thickness, otherwise, the part of the hardness of measuring is the hardness that penetrates coating of material, and do not reflect the hardness of coating, and the coating hardness value of measuring has just reflected coating quality, hardness number is big, the densification of proof coating, perfect crystalline, cracking are difficult for taking place, and coating quality is good, otherwise, hardness number is little, and reflection coated crystal quality is loose, hypoplasia, be prone to cracking, coating quality is just poor, and this method relatively is suitable for what sheet material, to the pipe that has, wire rod, operate very difficultly, error is bigger.
The method of evaluation coating (or surface film) and basal body binding force
(1) laser spallation method, this is a kind of very complicated method of testing, and only is suitable for the coating of what plate material, laser is injected absorb piece, change or wave of compression, inject the interface of coating of material then, if coating is easily split or peeled off, then coating combine with the interface of poor quality, otherwise, all right.
(2) the pin method of Tearing that falls, after pin falls, coating surface is scratched, measure the size of coating adhesion with the size of the work done of dropping hammer that scratches same degree, the merit of work is big, and then adhesion is strong, otherwise it is then poor, the instrument of some type also is furnished with acoustic emissionization, penetrates the two and combines and can more correctly measure Bond Strength of Coating because of acoustic emission appears in the scuffing process, and the method only is suitable for the what sheet coupon.
(3) friction testing method is used the 6mm diameter, and an end is the rod iron in smooth half garden, and area of friction in 15 seconds is 5cm
2Coated areas, what bubble or peeling did not appear in coating is exactly the strong coating of adhesion, otherwise, then poor.The method only is suitable for the dull and stereotyped sample of what.
(4) heating-quenching method of testing is heated to uniform temperature (temperature is decided on coating) to coating sample, is incubated in heating furnace; avoid oxidation with atmosphere protection coating and matrix; shrend then, the anchoring strength of coating difference cracking or peeling will appear, the method only is suitable for the what metallic coating.
Also have certain methods in addition, check metallic coating and high base strength with destruction methods such as sharp knife, saw, impacts.In a word, said method all is the damage test method, and most method complicated operation, and error is big again, and not saturating symphysis is produced on-the-spot.
The object of the present invention is to provide a kind of suitable production scene check, easy and simple to handle, the nondestructive testing method of good reproducibility.
The invention provides a kind of detection method of coating quality of metal surface, comprise the coat of metal of various metals, the mensuration of nonmetallic coating and surface film quality is characterized in that:
(1) determine the typical sample spectrum signature:
Coating to be detected is selected the typical sample of 2～6 kinds of different class, detect by following similarity condition and step;
At two particles of specimen surface at a distance of a specific range 2mm～10000mm, place full sized pules signal source and acoustic emission transducer respectively, wherein a particle exposes matrix, connects the prime amplifier spectrum analyzer behind the transducer;
The full sized pules signal source is injected the full sized pules ripple to testing sample, the acoustic emission transducer received signal, amplify and carry out quick Fourier analyze frequency spectrum;
The typical wave spectrum and the frequency spectrum that obtain are carried out signature analysis.Said method can be realized with measuring equipment shown in Figure 1.
1. full sized pules
Optimal full sized pules is to produce the very step ripple of broadband component, the antimonial lead core, glass capillary fractures all can produce this type of step ripple, the pulsating wave that the antimonial lead core of general in the world is 0.3mm diameter fractures and produces, second kind is the pulse that glass capillary produces that fractures, the third pulse that is electric spark produces all can be used as the full sized pules ripple, the sharp strive forward ripple that also has the magnetostriction generation in addition, or the pulsating wave that is produced by the sharp strive forward piezoelectric transducer of electricity also can be used as the full sized pules ripple, for wire rod, our usefulness be that the antimonial lead core pulsating wave that is produced that fractures is made the full sized pules ripple, easy and simple to handle, good reproducibility, and be point source, be suitable for the coating of what different shape, so this pulsating wave is the most frequently used.
2. transducer and used instrument, used acoustic emission transducer is a wide-band transducer, and all there is production in each transducer producer, and bandwidth generally surpasses 1MHg, and our used model is PAC WD-806.
What join with transducer is prime amplifier, and used prime amplifier is broadband (bandwidth is the bandwidth of low what transducer), low-noise preamplifier, and our used model is PAC1220A.
What join with prime amplifier is Acoustic radiating instrument, after connect wave spectrum analyzer, last print output data, used Acoustic radiating instrument is the LOCAN AT that PAC produces, and wave spectrum analyzer is TRA2.5M, and printer is the DX2300/2400 that Japanese FUJITSU produces, it more than is general generation device, the also available single channel Acoustic radiating instrument that has arrangements for analyzing frequency, if market demand, it is used for the coating quality evaluation to produce special-purpose instrument.
By embodiment in detail the present invention is described in detail below in conjunction with accompanying drawing.
Accompanying drawing 1 film quality determinator synoptic diagram;
The waveform (a) of the measured phosphating coat of accompanying drawing 2 matter and spectrum signature (b);
The waveform (a) of the phosphating coat of accompanying drawing 3 fair average qualities and spectrum signature (b);
The waveform (a) and the spectrum signature (b) of the phosphating coat that accompanying drawing 4 is off quality;
The waveform (a) of the acoustic emission wave of accompanying drawing 5 steel wire matrixes and spectrum signature (b);
The absorption electronic image of accompanying drawing 6 steel wire samples.
(a) draw ear-piercing cry is arranged when dialling
(b) draw ear-piercing cry is arranged when dialling
(c) arbitrarily 94.2.28 night shift
(d) random 94.3.5 mornig shift
(e) random 94.3.5 mornig shift
(f) random 94.3.5 mornig shift
(g) the arbitrarily 94.3.8 middle class in a kindergarten
(h) the arbitrarily 94.3.8 middle class in a kindergarten
(i) the arbitrarily 94.3.8 middle class in a kindergarten
(j) random 94.3.15 mornig shift
(k) random 94.3.15 mornig shift
(l) random 94.3.16 mornig shift
(m) random 94.3.16 mornig shift
(n) random 94.3.17 mornig shift
(o) random 94.3.17 mornig shift
(p) random 94.3.17 mornig shift
(q) random 94.3.18 mornig shift
(r) random 94.3.18 mornig shift
Embodiment 1:
The phosphatization of metal surface is handled and originally was used for the anticorrosion of iron and steel, developed into the lubricating layer and the carrier of calendering distortion afterwards, the bond strength of phosphating coat and steel matrix depends on the quality of phosphating coat, the method that tradition is estimated phosphorization film quality is to tear, destroy method such as peel off, error is bigger again, and to tubing, the evaluation of non-planar phosphorization film quality such as wire rod lacks simple and easy method accurately especially, often judge by rule of thumb, usually cause very big mistake, commercial production such as pipeline are caused very big loss, the present invention has created a kind of new method, can be convenient, simple and easy, the quality of nondestructive evaluation steel wire phosphating coat and other coating for metal surfaces is applicable to production R﹠D institutions such as factory exactly.
Principle: the pulse signal of normal intensity is injected into steel wire (surface for phosphating coat) sample (sample that contains other superficial layers all can), full sized pules can produce decay by phosphating coat (or other superficial layers) when entering matrix, its attenuation degree depend on phosphating coat quality and with the quality of matrix bond, and the quality of phosphating coat is relevant with its crystalline state, if phosphorization film quality is good, must get well (phosphating coat and matrix bond that run-of-the-mill is good are better) with matrix bond again, then this full sized pules decay is minimum, otherwise decay is just big, the big signal of decaying, its high fdrequency component is more, measure the decay size of phosphating coat according to test to acoustic emission signal, waveform and spectrum analysis data just can be evaluated the quality of phosphating coat, and and the bonding properties of matrix.
Detection method
The determinator of phosphorization film quality such as Fig. 1: sample (1) length is 125mm, one end polishes with emery wheel, the metal surface of exposing light, the long coupled end that is 20mm as transducer (2), the other end at distance transducer 100mm place, one standard signal source injects full sized pules on the phosphating coat surface, receive (being coupled with vaseline between transducer (2) and steel wire matrix (1)) through acoustic emission transducer (2), enter prime amplifier (3) again, wave filter (4), main amplifier (5) enters spectrum analyzer (6) then and carries out quick Fourier (F.E.T) analysis, and the spectrum analysis data after the analysis are through printer (7) printout.
Testing result:
Quality to various phosphating coats is measured, and according to spectrum signature, wave amplitude height and frequency content are come the quality of quantitative assessment phosphating coat, and the quality of it and matrix bond, can divide three kinds of characteristic features as follows:
1. the measured steel wire phosphating coat of matter acoustic emission wave, wave amplitude is higher, and the forward position is steeper, and the envelope area of acoustic emission wave is bigger, and shown in Fig. 2 (a), its predominant frequency peak position is in about 275KHz, and peak value is higher, and its value is for about 0dB or bigger.Also have amplitude in addition between the secondary peak that is positioned at 110KHz and 480KHz between the-5-10dB, the high fdrequency component that is higher than 500KHz is less, sees Fig. 2 (b).
2. the wave amplitude of the acoustic emission wave of fair average quality phosphating coat is medium, the forward position slows down, and its envelope area also is medium, sees Fig. 3 (a), its predominant frequency peak is to shifting left in about 220KHz, peak height is-dominant frequency component of 5dB size, lay respectively at 110KHz, 220KHz, 280KHz, also have a peak height to be-the secondary frequencies peak of the 490KHz of 15dB in addition, high fdrequency component is more than Fig. 2's (b), shown in Fig. 3 (b).
3. ropy phosphating coat wave spectrum feature, steel wire with phosphating coat of this quality is difficult to draw to be dialled, the wave amplitude of the acoustic emission wave of this phosphating coat is minimum, the forward position is slow, its envelope area is also minimum, see Fig. 4 (a), its dominant frequency component further moves to left, near 110khZ, and its peak value pact-10dB or littler, also have in addition peak value be about-15dB be positioned at 150KHz, three secondary peaks of 185KHz and 240KHz, have near the 370KHz peak value be-27.5dB and 475KHz near, peak height is-the lower secondary peak of 30dB, high fdrequency component greater than 500KHz increases greatly, sees shown in Fig. 4 (b).
4. the acoustic emission wave spectrum signature of steel wire matrix, this ripple does not pass through phosphating coat, only in the long steel wire of 100mm, pass through, almost not decay, so the wave amplitude of acoustic emission wave is the highest, its envelope area is also maximum, see shown in Fig. 5 (a), be place, predominant frequency peak near the 280KHz, peak height is about 5dB, is having three highly to be the secondary frequencies peak about-10dB near 110KHz, 170KHz, the 460KHz, the small frequency peak that one-20dB is arranged at 500KHz, the high fdrequency component that is higher than 500KHz is less, with among Fig. 2 (b) quite, see Fig. 5 (b).
Sample survey the results are shown in Table 1 to the steel wire phosphating coat according to above standard.
Comparative example:
The microstructure of steel wire phosphating coat
The steel wire sample is identical with embodiment, and the steel wire sample does not all have complete river shape crystallization style, presents broken river shape tissue, broken varying degree, the degree of crushing that has seriously to so that do not have river shape crystallization style, it draws group performance extremely bad, is sorry and draws the preface of exchanging work.
The absorption electronic image of steel wire sample such as accompanying drawing 6.
Table 1 phosphorization film quality detects table
| Specimen coding: | Phosphorization film quality |
| Draw the arbitrarily arbitrarily arbitrarily 94.3.8 middle class in a kindergarten-2 of the 94.3.8 middle class in a kindergarten-1 of 94.3.5 mornig shift of the random 94.3.5 mornig shift of the random 94.2.28 night shift of ear-piercing cry is arranged when dialling | Bad indivedual area slightly good near medium good+minority position quality slightly poor good-some position quality slightly poor good-some position be medium or defective good minority position relatively poor in the position of difference more |
| 94.3.15 mornig shift-A 94.3.15 mornig shift-B 94.3.15 mornig shift-C | Good and medium mixing, the minority position relatively poor good, medium be main, defective also mix defective and medium mixed in together |
| 94.3.16 mornig shift-A 94.3.16 mornig shift-B 94.3.16 mornig shift-C | Defective with medium mix good, in, bad mixing-, medium, bad mixed in together |
| 94.3.17 mornig shift-A 94.3.17 mornig shift-B 94.3.17 mornig shift-C | Medium, indivedual positions are poor slightly medium, and some position is poor slightly mixes with medium well, and indivedual positions are defective |
| 94.3.18 mornig shift-A 94.3.18 mornig shift-B 94.3.18 mornig shift-C | Mix with medium well, indivedual positions are poor slightly mixes with medium well, poor slightly medium and defective the mixing in indivedual positions, some position is good slightly |
| (93.8.2 No. 1) 93.8.5 (No. 3) | Good, indivedual medium defective, some positions are good |
| 93.11.9 93.11.13 94.11.17 94.11.18 94.11.20 | Good, poor slightly medium and defective mixing of some position, some position more carefully+defective some position more carefully+ |
Comparative example:
Steel wire phosphating coat microsclerometry method:
The metallography microscope hardness method is measured phosphorization film quality, not only method is simple, and measurement result and numeric distribution thereof, can more reasonably react factors such as the various states of steel wire phosphating coat, thickness, institutional framework, defective, interface combination, be a kind of efficient ways so measure phosphorization film quality with the metallography microscope hardness method.
In view of steel wire diameter thin (about Φ 5.7mm), phosphating coat very thin (about 10 μ m), be effective control survey error, adopt under the 50g load and measure microhardness value, wear rete in order to avoid press, only calculate microhardness value with the axial catercorner length of rhombus, and diagonal line perpendicular to axial direction is a curve, its length is difficult for measuring standard and does not just consider, each sample is cut into about 20-25mm length, regrinds into the semicircular sample in cross section, and the stand under load bottom surface becomes plane stably, each sample measurement is averaged more than 7, following table is the phosphating coat microhardness value, is found out by data in the table, and is higher with the phosphating coat hardness number that base material combine well, and combining relatively poorly with base material, its hardness number is also lower.
Carry out micro-hardness measurement in metal research institute of Chinese Academy of Sciences metallographic chamber, the sclerometer model of usefulness is a MICROMET metallographic sclerometer.
The microhardness value of table 2 steel wire phosphating coat
| Specimen coding | Microhardness value (50 gram/mm 2) | Mean value | The macroscopic view situation |
| Draw group cry ear-piercing | ?152，232，232，134，232，232，232 | ?206 | Phosphating coat burnt hair look |
| Random 8/3 middle class in a kindergarten | ?260，257，260，246，232，251 | ?251 | Phosphating coat is general |
| Random 8/2 night shift | ?236，274，257，241，249 | ?251 | Phosphating coat is general |
| Random 5/3 mornig shift | ?236，303，257，274，265，299，274，286，257 | ?272 | Phosphating coat is better |
| Random 5/3-mornig shift | ?262，312，332，454，280，232，386，289，265 | ?313 | Phosphating coat is good smooth |
| 18/3 mornig shift-A | ?313，423，262，268，276，341，319，441，422 | ?351 | Phosphating coat is good, and is smooth |
| 18/3 mornig shift-B | ?232，277，313，232，232，185，236，286，391，232，286 | ?235 | Phosphating coat is general |
| 18/3 mornig shift-C | ?353，341，293，321，262，280，257，251，293，321，289 | ?296 | Phosphating coat is better |
| 17/3 mornig shift-A | ?329，299，386，313，306，299，293，303，293 | ?313 | Phosphating coat is good, and is smooth |
| 17/3 mornig shift-B | ?393，21，353，232，321，362，341，321 | ?310 | Phosphating coat is good, and is smooth |
| 17/3 mornig shift-C | ?212，228，161，155，212，201，199，232，148，151，183 | ?198 | The phosphating coat inequality, grey |
| 16/3 mornig shift-A | ?329，332，262，280，232，232，296，303，286，212，246 | ?273 | Phosphating coat is better |
| 16/3 mornig shift-B | ?232，232，232，232，232，232，310，265，274，262，260 | ?251 | Phosphating coat is general |
| 16/3 mornig shift-C | ?280，271，172，168，245，265，167 | ?226 | Phosphating coat burnt hair look |
| 15/3 mornig shift-A | ?232，232，283，303，232，341，280，286，321，246，232，271 | ?271 | Phosphating coat is better |
| 15 mornig shifts-B | ?341，336，306，284，274，232，362，289，274，303，313，345，232 | ?299 | Phosphating coat is good, and is smooth |
| 15/3 mornig shift-C | ?257，103，232，232，232，232，232，232 | ?219 | Phosphating coat burnt hair look |
The surface topography microexamination by relatively can inventing testing result of the present invention and phosphating coat and the measurement result of microhardness are coincide better, the on-the-spot group result that draws also proves, every underproof phosphating coat, its steel wire draw dial very difficult, that have even ear-piercing birdie occurs, the medium steel wire of becoming reconciled of phosphorization film quality all can be by drawing the skill of exchanging work, check has also been found simultaneously, the steel wire of same phosphating process, the quality of phosphating coat is not to be on all four yet, some position is good, and some position is medium, and even this fact has just been found in the surface topography microexamination before some position defective (seeing examination table), current micro-hardness measurement has also confirmed this point, therefore, existing phosphating process is still waiting to improve, so that guarantee the homogeneity of phosphorization film quality.
The present invention also is applicable to the grade estimation of other infiltration layers, and the evaluation of adhesive linkage quality, and can estimate the quality of the big material of attenuation coefficients such as rubber, plastics.
Claims (6)
1. the detection method of a coating quality of metal surface comprises the coat of metal of various metals, and the mensuration of nonmetallic coating and surface film quality is characterized in that:
(1) determine the typical sample spectrum signature:
Coating to be detected is selected the typical sample of 2～6 kinds of different class, detect by following similarity condition and step;
At two particles of specimen surface at a distance of a specific range 2mm～10000mm, place full sized pules signal source and acoustic emission transducer respectively, wherein a particle exposes matrix, connects prime amplifier and spectrum analyzer behind the transducer;
The full sized pules signal source is injected the full sized pules ripple to testing sample, the acoustic emission transducer received signal, amplify and carry out quick Fourier analyze frequency spectrum;
The typical wave spectrum and the frequency spectrum that obtain are carried out signature analysis;
(2) detect
Testing conditions and step are same as described above, the wave spectrum that obtains and frequency spectrum and the typical wave spectrum and the frequency spectrum that have obtained are compared, to determine the quality of institute's test specimens coating quality.
2. by the detection method of the described coating quality of metal surface of claim 1, it is characterized in that: described full sized pules preferably can produce the very step ripple of broadband component.
3. by the detection method of claim 1,2 described coating quality of metal surface, it is characterized in that: testing sample can be sheet material, wire rod or tubing.
4. by the detection method of the described coating quality of metal surface of claim 3, it is characterized in that: when sample was the steel wire of phosphating coat, the distance between full sized pules signal source and acoustic emission transducer was preferably 50～100mm.
5. by the detection method of the described coating quality of metal surface of claim 4, it is characterized in that: preferably an end of transducer exposes matrix.
6. by the detection method of the described coating quality of metal surface of claim 5, it is characterized in that: the pulsating wave that full sized pules fractures and produced for general in the world 0.3mm diameter antimonial lead core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110206 CN1061141C (en) | 1995-04-27 | 1995-04-27 | Method for detecting coating quality of metal surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110206 CN1061141C (en) | 1995-04-27 | 1995-04-27 | Method for detecting coating quality of metal surface |
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| Publication Number | Publication Date |
|---|---|
| CN1134550A true CN1134550A (en) | 1996-10-30 |
| CN1061141C CN1061141C (en) | 2001-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95110206 Expired - Fee Related CN1061141C (en) | 1995-04-27 | 1995-04-27 | Method for detecting coating quality of metal surface |
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| CN (1) | CN1061141C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153723A (en) * | 2016-07-28 | 2016-11-23 | 耐世特凌云驱动***（芜湖）有限公司 | The ultrasonic detection device of axostylus axostyle |
| CN110146510A (en) * | 2019-05-14 | 2019-08-20 | 苏州市新特纺织有限公司 | A kind of coating quality on-line monitoring method based on image recognition technology |
-
1995
- 1995-04-27 CN CN 95110206 patent/CN1061141C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153723A (en) * | 2016-07-28 | 2016-11-23 | 耐世特凌云驱动***（芜湖）有限公司 | The ultrasonic detection device of axostylus axostyle |
| CN110146510A (en) * | 2019-05-14 | 2019-08-20 | 苏州市新特纺织有限公司 | A kind of coating quality on-line monitoring method based on image recognition technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1061141C (en) | 2001-01-24 |
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