CN106680324A - Method for judging orientation of multilayer metal clad plate component layer - Google Patents
Method for judging orientation of multilayer metal clad plate component layer Download PDFInfo
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- CN106680324A CN106680324A CN201510762887.2A CN201510762887A CN106680324A CN 106680324 A CN106680324 A CN 106680324A CN 201510762887 A CN201510762887 A CN 201510762887A CN 106680324 A CN106680324 A CN 106680324A
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Abstract
The invention discloses a method for judging orientation of a multilayer metal clad plate component layer. The method comprises the following steps: step one, enabling a conductivity detection device to be clung to one side of a multilayer metal clad plate, detecting and recording a first detection value; and step two, enabling the conductivity detection device to be clung to the other side of the multilayer metal clad plate, detecting and recording a second detection value. When the conductivity of a first component layer is greater than that of a second component layer, the orientation of the multilayer metal clad plate component layer in the step with a great detection value is a first orientation, and the orientation of the multilayer metal clad plate component layer in the step with a small detection value is a second orientation. Through the method for judging orientation of the multilayer metal clad plate component layer, a portable digital display eddy current conductivity meter is used as detection equipment; the equipment is low in cost and convenient to carry; when detecting, a probe is just used for testing the conductivity of the upper surface and the conductivity of the lower surface of the clad plate respectively; the orientation of the component layer can be rapidly judged according to the difference between the tested conductivity values of the upper surface and the lower surface; the method is extremely suitable for application in production site.
Description
Technical field
The present invention relates to a kind of method of quick judgement multi-layer metal composite plate constituent element layer direction.
Background technology
The present invention is directed to a kind of four layers of composite plate of aluminium alloy, and the composition of the composite is as shown in Figure 1：From top to bottom, 1st, 4 two-layers (i.e. skin material) are a kind of AA4045 aluminium alloys (Al-Si alloys, it is substantially free of Mn, Zn element), 2nd layer is a kind of AA7072 aluminium alloys (Al-Zn alloys, Zn 0.8～1.3wt.% of content, Mn element ＜ 0.1wt.%), the 3rd layer is a kind of AA3003M aluminium alloys (Al-Mn alloys, Mn 1.0～2.0wt.% of content, Zn constituent content ＜ 0.05wt.%).The product was needed according to the direction of AA7072 (i.e. compared with AA3003M before the batching of final step (finished product is volume), AA7072 layers up or lower section) determining take-up direction (clockwise or counterclockwise), therefore, judge that the direction in AA7072 faces is particularly significant.
The method for judging at present mainly has two kinds：First method is sheet material tow sides to be detected respectively (shooting depth is about 0.15mm, may pass through AA4045 layers) using electric spark direct-reading spectrometer.To electric spark direct-reading spectrometer Analysis of test results, the higher side of measured value (>=0.4wt.%) of Zn contents, skin material lower section is AA7072 alloys, and the side of Zn content measurement values very low (≤0.02wt.%), skin material lower section is AA3003M alloys.The advantage of this kind of decision method is that testing result is accurate, but is suffered from the drawback that, on the one hand, spectrometer equipment is expensive, and testing cost is very high；On the other hand, need the sample for being adapted to spectrogrph detection from the upper clip of aluminum volume to be sent to sensing chamber's analysis at spectrometer equipment place, be not suitable in production scene direct detection.Second method is to utilize metallographic method, and to the interface of the composite plate pre-grinding, polishing, overlay film are carried out, and can clearly judge the direction in AA7072 faces in the alloy, and the method is very accurate, but process is loaded down with trivial details, inefficiency.
The content of the invention
It is an object of the invention to provide a kind of method for judging multi-layer metal composite plate constituent element layer direction, with the technical problem for solving current method high cost, being not suitable for site inspection or the loaded down with trivial details inefficiency of detection process.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of method for judging multi-layer metal composite plate constituent element layer direction, the multi-layer metal composite plate at least includes the first different constituent element layer of electric conductivity and the second constituent element layer, and the first constituent element layer and the second constituent element layer are combined into clad metal sheet；The method is comprised the following steps：
With conductivity detector as object of reference,, than the second constituent element layer closer to being the first direction of multi-layer metal composite plate constituent element layer during conductivity detector, the second constituent element layer is than the first constituent element layer closer to being the second direction of multi-layer metal composite plate constituent element layer during conductivity detector for first constituent element layer；
Step 1, with conductivity detector certain one side of multi-layer metal composite plate is adjacent to, and detects and record the first detected value；
Step 2, with conductivity detector the another side of multi-layer metal composite plate is adjacent to, and detects and record the second detected value；
When first constituent element layer electrical conductivity is more than the second constituent element layer：In the big step of detected value, multi-layer metal composite plate constituent element layer is oriented the first direction；In the little step of detected value, multi-layer metal composite plate constituent element layer is oriented the second direction；
When first constituent element layer electrical conductivity is less than the second constituent element layer：In the big step of detected value, multi-layer metal composite plate constituent element layer is oriented the second direction；In the little step of detected value, multi-layer metal composite plate constituent element layer is oriented the first direction.
The method for judging multi-layer metal composite plate constituent element layer direction as above of the invention, further, the multi-layer metal composite plate is multilamellar aluminium alloy compound plate, and it includes the first constituent element layer, the second constituent element layer, third element layer and the 4th constituent element layer；The first constituent element layer and the second constituent element layer are clipped between third element layer and the 4th constituent element layer；
The first constituent element layer is Al-Zn alloys；
The second constituent element layer is Al-Mn alloys；
The third element layer and the 4th constituent element layer are thickness identical same metal or alloy.
Preferably, the first constituent element layer is AA7072 aluminium alloys.
Preferably, the second constituent element layer is AA3003M aluminium alloys.
Preferably, the third element layer and the 4th constituent element layer are thickness identical AA4045 aluminium alloy.
The method for judging multi-layer metal composite plate constituent element layer direction as above of the invention, further, the conductivity detector is digital display eddy conductivity detector.
The invention has the beneficial effects as follows：
Compared with prior art, the present invention is using Portable digital display eddy current conduc as testing equipment, and equipment cost is low, and easy to carry.During detection, only need to using probe, the electrical conductivity of difference test compound plate upper and lower surface, the difference of the conductivity value according to measured by upper and lower surface just can quickly judge the direction of AA7072 alloys, without the need for sampling from aluminum volume, the method is very suitable for being used in production scene.Additionally, compared with metallographic method, detection process is simple, detection time is saved.
Description of the drawings
By the detailed description made in conjunction with the following drawings, above-mentioned and/or other aspects of the present invention and advantage will be apparent from and be easier to understand, and these accompanying drawings are simply schematic, are not intended to limit the present invention, wherein：
Fig. 1 is the multi-layer metal composite plate schematic diagram of the first embodiment of the invention；
Fig. 2 is the multi-layer metal composite plate of the first embodiment of the invention first towards schematic diagram；
Fig. 3 is the multi-layer metal composite plate of the first embodiment of the invention second towards schematic diagram；
Fig. 4 is the multi-layer metal composite plate schematic diagram of second embodiment of the invention；
Fig. 5 is the multi-layer metal composite plate of second embodiment of the invention first towards schematic diagram；
Fig. 6 is the multi-layer metal composite plate of second embodiment of the invention second towards schematic diagram.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, the first constituent element layer, the 2, second constituent element layer, 3, third element layer, the 4, the 4th constituent element layer, 5, conductivity detector.
Specific embodiment
Hereinafter, the embodiment of the method for judging multi-layer metal composite plate constituent element layer direction of the present invention is described with reference to the accompanying drawings.
The embodiment that here is recorded is the specific specific embodiment of the present invention, is explanatory and exemplary for illustrating the design of the present invention, should not be construed as the restriction to embodiment of the present invention and the scope of the invention.Except the enforcement exception that here is recorded, those skilled in the art can also be based on the application claims and description disclosure of that using obvious other technical schemes, and these technical schemes include the technical scheme for making any obvious substitutions and modifications using the embodiment recorded to here.
As shown in figure 1, being a kind of double-level-metal composite plate, it includes the first constituent element layer 1 and the second constituent element layer 2, it is assumed that the electrical conductivity of the first constituent element layer is more than the second constituent element layer；Such as the first constituent element layer is AA7072 aluminium alloys, and the second constituent element layer is AA3003M aluminium alloys.
With conductivity detector 5 as object of reference,, than the second constituent element layer closer to being the first direction of multi-layer metal composite plate constituent element layer during conductivity detector, the second constituent element layer is than the first constituent element layer closer to being the second direction of multi-layer metal composite plate constituent element layer during conductivity detector for first constituent element layer；
Step 1, as shown in Fig. 2 being adjacent to certain one side of multi-layer metal composite plate with conductivity detector, detects and records the first detected value；
Step 2, as shown in figure 3, being adjacent to the another side of multi-layer metal composite plate with conductivity detector, detects and records the second detected value；
The testing result of analysis above-mentioned steps：In the big step of detected value, multi-layer metal composite plate constituent element layer is oriented the first direction；In the little step of detected value, multi-layer metal composite plate constituent element layer is oriented the second direction；
The detection method of the present invention has advantages below：
The present invention is using Portable digital display eddy current conduc as testing equipment, and equipment cost is low, and easy to carry.During detection, only need to using probe, the electrical conductivity of difference test compound plate upper and lower surface, the difference of the conductivity value according to measured by upper and lower surface just can quickly judge the direction of AA7072 alloys, without the need for sampling from aluminum volume, the method is very suitable for being used in production scene.Additionally, compared with metallographic method, detection process is simple, detection time is saved.
Fig. 4 illustrates a kind of four layers of composite plate of aluminium alloy, its gross thickness is 0.6mm, and it includes the first constituent element layer 1 (clad ratio 6%), the second constituent element layer 2 (thickness accounting 30%), third element layer 3 (thickness accounting 58%) and the 4th constituent element layer 4 (clad ratio 6%)；The first constituent element layer 1 and the second constituent element layer 2 are clipped between the constituent element layer 4 of third element layer 3 and the 4th；The first constituent element layer is Al-Zn alloys, and the first constituent element layer shown in Fig. 4 is AA7072 aluminium alloys.The second constituent element layer is Al-Mn alloys；The second constituent element layer shown in Fig. 4 is AA3003M aluminium alloys.The third element layer and the 4th constituent element layer are thickness identical same metal or alloy.Third and fourth constituent element layer shown in Fig. 4 is AA4045 aluminium alloys.
When the close conductive surface of the coil for being loaded with determination frequency and amplitude AC electricity, alternating current is produced and hands over side magnetic field in electric conductor surface and near surface sensing generation vortex in coil.The magnetic field of vortex of inducting reacts on coil, and this counteractive size is relevant with the electrical conductivity on electric conductor surface and near surface.The electrical conductivity of nonmagnetic conductive body can directly be measured by the instrument demarcated with electrical conductivity (such as digital display eddy current conduc).
The solid solution of alloying element in alloy can appreciable impact electrical conductivity.And for aluminium alloy, the Mn elements of identical solid solubility can significantly reduce the electrical conductivity of alloy compared with Zn elements.AA7072 aluminium alloys are Al-Zn alloys, and AA3003M is Al-Mn alloys.When with the probe of digital display eddy current conduc (equipment should meet the requirement of GB/T12966-2008) four layers of aluminium alloy compound plate are carried out with electrical conductivity test, it may appear that two kinds of situations shown in Fig. 5 (AA7072 is above AA3003M), Fig. 6 (AA7072 is below AA3003M).In Fig. 6 the position of AA3003M alloys than in Fig. 5 the alloy be located closer to pop one's head in (reducing the thickness of AA7072 alloys), by Kelvin effect, (Kelvin effect refers to when having alternating current or alternating magnetic field in conductor, the CURRENT DISTRIBUTION of conductor is uneven, and current convergence is in a kind of phenomenon of conductive surface part) impact, the measured value of the situation electrical conductivity shown in Fig. 6 is significantly lower than situation shown in Fig. 5, generally low 3～4MS/m (device measuring scope is 0.46～64MS/m, certainty of measurement ± 1%).Can determine whether that the high side skin material lower section of the direction of AA7072, i.e. conductivity value is AA7072 aluminium alloys by comparing the test value of four layers of composite plate tow sides electrical conductivity, the low side skin material lower section of conductivity value is AA3003M aluminium alloys.
Testing procedure：
S1, (Xiamen Tian Yan Instrument Ltd. produces, model Sigma2008A to open digital display eddy current conduc；The market price is 1.5 ten thousand to 20,000.), it is directly entered test pattern (being calibrated without the need for preheating and using calibration mark block, because this method is the comparison of electrical conductivity show value, the electrical conductivity without accurately testing out the composite).
S2, choose aluminum and wind off a smooth position, by the one side (can not leave gap between probe and composite plate) of the probe contacts composite plate of digital display eddy current conduc, start test, when test is completed (test process is within 2 seconds), equipment has prompt tone and shows conductivity value automatically, writes down the test value (for the sake of assurance, the present embodiment repeated measure is averaged for 10 times).The another side that probe moves on to composite plate is tested again, test completes to write down test value (for the sake of assurance, the present embodiment repeated measure is averaged for 10 times).
S3, the result tested more twice is AA7072 alloys below the high dough cover material of conductivity value.Subsequently composite plate is carried out by batching for next step according to the requirement of client.Data result is shown in Table 1.
Four layers of composite plate of above-mentioned aluminium alloy are detected using the direct-reading spectrometer (market price is between 600,000 to 800,000) of model ARL3460 of match Mo Feishier companies production；Testing result is as shown in table 2.
The conductivity data of table 1
The Zn constituent content data of table 2
Each technical characteristic of above-mentioned disclosure be not limited to it is disclosed with further feature combination, those skilled in the art can also according to the purpose of invention carry out other between each technical characteristic combine, to realize that the purpose of the present invention is defined.
Claims (10)
1. it is a kind of judge multi-layer metal composite plate constituent element layer direction method, the multi-layer metal composite plate
At least include different the first constituent element layer of electric conductivity and the second constituent element layer, the first constituent element layer and second group
First layer is combined into clad metal sheet；Characterized in that, comprising the following steps：
With conductivity detector as object of reference, the first constituent element layer is examined than the second constituent element layer closer to electrical conductivity
It is the first direction of multi-layer metal composite plate constituent element layer during survey device, the second constituent element layer is than the first constituent element layer more
It is the second direction of multi-layer metal composite plate constituent element layer during close conductivity detector；
Step 1, with conductivity detector certain one side of multi-layer metal composite plate is adjacent to, and is detected and is remembered
Record the first detected value；
Step 2, with conductivity detector the another side of multi-layer metal composite plate is adjacent to, and is detected and is remembered
Record the second detected value；
When first constituent element layer electrical conductivity is more than the second constituent element layer：In the big step of detected value, multiple layer metal is multiple
Plywood constituent element layer is oriented the first direction；In the little step of detected value, multi-layer metal composite plate constituent element layer court
To for the second direction；
When first constituent element layer electrical conductivity is less than the second constituent element layer：In the big step of detected value, multiple layer metal is multiple
Plywood constituent element layer is oriented the second direction；In the little step of detected value, multi-layer metal composite plate constituent element layer court
To for the first direction.
2. it is according to claim 1 judge multi-layer metal composite plate constituent element layer direction method, its
Be characterised by, the multi-layer metal composite plate be multilamellar aluminium alloy compound plate, it include the first constituent element layer,
Second constituent element layer, third element layer and the 4th constituent element layer；The first constituent element layer and the second constituent element layer are clipped in
Between third element layer and the 4th constituent element layer；
The first constituent element layer is Al-Zn alloys；
The second constituent element layer is Al-Mn alloys；
The third element layer and the 4th constituent element layer are thickness identical same metal or alloy.
3. it is according to claim 1 and 2 judge multi-layer metal composite plate constituent element layer direction method,
Characterized in that, the first constituent element layer is AA7072 aluminium alloys.
4. it is according to claim 1 and 2 judge multi-layer metal composite plate constituent element layer direction method,
Characterized in that, the second constituent element layer is AA3003M aluminium alloys.
5. it is according to claim 3 judge multi-layer metal composite plate constituent element layer direction method, its
It is characterised by, the second constituent element layer is AA3003M aluminium alloys.
6. it is according to claim 1 and 2 judge multi-layer metal composite plate constituent element layer direction method,
Characterized in that, the third element layer and the 4th constituent element layer are thickness identical AA4045 aluminium alloy.
7. it is according to claim 3 judge multi-layer metal composite plate constituent element layer direction method, its
It is characterised by, the third element layer and the 4th constituent element layer are thickness identical AA4045 aluminium alloy.
8. it is according to claim 4 judge multi-layer metal composite plate constituent element layer direction method, its
It is characterised by, the third element layer and the 4th constituent element layer are thickness identical AA4045 aluminium alloy.
9. it is according to claim 5 judge multi-layer metal composite plate constituent element layer direction method, its
It is characterised by, the third element layer and the 4th constituent element layer are thickness identical AA4045 aluminium alloy.
10. the judgement multilayer metal compound according to claim 1,2,5,7,8 and 9 any one
The method of plate constituent element layer direction, it is characterised in that the conductivity detector is digital display eddy conductivity
Detector.
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| CN103660429A (en) * | 2013-11-29 | 2014-03-26 | 中国船舶重工集团公司第七二五研究所 | Multi-layer metal composite plate and manufacturing method thereof |
| CN104708867A (en) * | 2008-02-12 | 2015-06-17 | 株式会社神户制钢所 | Multi-layered sheet of aluminum alloys |
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| CN104708867A (en) * | 2008-02-12 | 2015-06-17 | 株式会社神户制钢所 | Multi-layered sheet of aluminum alloys |
| CN103018323A (en) * | 2012-12-07 | 2013-04-03 | 爱德森（厦门）电子有限公司 | Aluminum alloy multilayer composite plate bolt hole crack defect in-service electromagnetic detection device |
| CN103660429A (en) * | 2013-11-29 | 2014-03-26 | 中国船舶重工集团公司第七二五研究所 | Multi-layer metal composite plate and manufacturing method thereof |
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