CN115876688A - Coating bonding strength detection method and sample brushing device - Google Patents
Coating bonding strength detection method and sample brushing device Download PDFInfo
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- CN115876688A CN115876688A CN202211665276.2A CN202211665276A CN115876688A CN 115876688 A CN115876688 A CN 115876688A CN 202211665276 A CN202211665276 A CN 202211665276A CN 115876688 A CN115876688 A CN 115876688A
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Abstract
The invention provides a method for detecting the bonding strength of a coating and a sample brushing device. The method for detecting the bonding strength of the coating comprises the following steps: driving the wheel type hairbrush to rotate around the axis of the brush shaft, and brushing the area of the sample with the coating by using the rotating wheel type hairbrush; and acquiring the abrasion condition of the sample, and determining the bonding strength of the coating according to the abrasion condition. The sample brushing and grinding device comprises a mounting seat, a wheel type hairbrush and a first driving mechanism, wherein the mounting seat is used for accommodating a sample; the wheel type hairbrush comprises a brush shaft, bristles and abrasive particles, the bristles are connected to the outer peripheral face of the brush shaft, the abrasive particles are connected to the outer surface of the bristles, and the first driving mechanism is used for driving the wheel type hairbrush to rotate around the axis of the brush shaft. The method for detecting the bonding strength of the coating can well simulate the failure condition of the coating in the actual cutting process of the cutter, and the bonding strength of the coating measured by the method can well reflect the actual bonding strength of the coating on the cutter.
Description
Technical Field
The invention relates to the technical field of coating detection, in particular to a coating bonding strength detection method and a sample brushing device.
Background
The diamond coating has higher hardness and wear resistance and lower friction coefficient, and the diamond coating cutter is commonly used for processing difficult-to-process materials such as graphite, high-silicon aluminum, titanium alloy, carbon fiber materials and the like. Diamond coated tools typically include a substrate and a diamond coating disposed on a surface of the substrate. The bond strength between the diamond coating and the substrate is related to the cutting effect of the tool and the tool life, and in general, the higher the bond strength, the better the cutting stability and life of the tool. In order to study the performance of diamond coated tools, the bond strength between the diamond coating and the substrate needs to be tested.
The existing methods for detecting the bonding strength between the coating and the substrate comprise methods such as a stretching method, a bubbling method, an indentation/scratch test, a friction and wear test, an erosion and wear test and the like. These methods require the preparation of a test specimen covered with a coating, then an attempt is made to cause some damage to the coating, and the strength of the bond between the coating and the substrate is evaluated based on the effect of the damage to the coating.
However, the existing detection method for the bonding strength of the coating cannot simulate the load condition of the coating of the cutter in the actual cutting process and cannot simulate the failure condition of the coating in the actual cutting process. This means that the bond strength of the coating measured during the test process does not better reflect the actual coating bond strength of the tool and does not better reflect the performance of the tool during the actual cutting process.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method for detecting the bonding strength of a coating, which can well simulate the failure condition of the coating in the actual cutting process of a cutter, and the bonding strength of the coating measured by the method can well reflect the actual bonding strength of the coating on the cutter.
The invention also provides a sample brushing and grinding device.
The method for detecting the bonding strength of the coating comprises the following steps:
driving a wheel type brush to rotate around the axis of a brush shaft, and brushing the area of the sample with the coating by using the rotating wheel type brush; the wheel type brush comprises a brush shaft, bristles and abrasive particles, the bristles are connected to the outer peripheral surface of the brush shaft and protrude in the radial direction of the brush shaft, and the abrasive particles are connected to the outer surfaces of the bristles;
and acquiring the abrasion condition of the sample, and determining the bonding strength of the coating according to the abrasion condition.
The method for detecting the bonding strength of the coating according to the embodiment of the first aspect of the invention has at least the following beneficial effects: when the wheel type brush brushes the sample, the wheel type brush moves relative to the sample in a similar mode to the mode of the workpiece moving relative to the cutter. Accordingly, the load condition of the coating of the sample during brushing by the wheel type brush is higher in similarity with the load condition of the coating of the cutter when contacting with the workpiece. Therefore, the method for detecting the bonding strength of the coating can well simulate the conditions of abrasion and failure of the coating on the cutter in the actual use process of the cutter, and the bonding strength of the coating of the sample measured by the method can well reflect the actual bonding strength of the coating on the cutter.
According to some embodiments of the invention, the sample comprises a rake face and a relief face, both the rake face and the relief face being provided with a coating, the rake face and the relief face intersecting to form an edge; the brushing of the coated area of the sample by the rotating wheel type brush comprises the following steps: and enabling the wheel type brush to brush and grind the edge.
According to some embodiments of the invention, said obtaining a wear condition of the specimen comprises: and acquiring the size parameters of the worn area of the sample.
According to some embodiments of the invention, the obtaining dimensional parameters of the worn area of the specimen comprises: the length of the wear zone is taken and the width of the wear zone is taken.
According to some embodiments of the invention, the obtaining dimensional parameters of the worn area of the specimen comprises: and acquiring an image of the worn area and acquiring the size parameter by a visual detection device.
A sample brushing device according to an embodiment of a second aspect of the present invention includes: the mounting seat is used for accommodating a sample with a coating arranged on the surface; the wheel type brush comprises a brush shaft, bristles and abrasive particles, the bristles are connected to the outer peripheral surface of the brush shaft and protrude in the radial direction of the brush shaft, the abrasive particles are connected to the outer surfaces of the bristles, and one ends of the bristles, far away from the brush shaft, are used for being in contact with the surface of the test sample; the first driving mechanism is connected with the brush shaft and used for driving the wheel type hairbrush to rotate around the axis of the brush shaft.
The sample brushing device according to the embodiment of the second aspect of the invention has at least the following advantages: the device can assist in realizing the method for detecting the bonding strength of the coating, and improves the convenience of brushing and grinding the sample.
According to some embodiments of the present invention, the sample brushing device further comprises a second driving mechanism, and the first driving mechanism or the mounting base is connected with the second driving mechanism, and the second driving mechanism is used for driving the wheel type brush and the mounting base to move close to or away from each other along the radial direction of the brush shaft.
According to some embodiments of the invention, the mounting block is connected to the second drive mechanism, and the mounting block comprises two clamping blocks which can move towards or away from each other, and the two clamping blocks can jointly clamp a part of the sample.
According to some embodiments of the invention, the abrasive particles are made of diamond, silicon carbide or corundum.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic diagram of the coating bond strength detection method of the present invention;
FIG. 2 is a schematic view of a prior art machining method for machining a workpiece by a tool;
FIG. 3 is a schematic view of a sample brushing device according to an embodiment of the present invention;
FIG. 4 is a schematic view of bristles and abrasive particles in the wheel brush of FIG. 3;
FIG. 5 is a schematic view (from a top view) of the wheel brush of FIG. 3 brushing the edge of the sample;
FIG. 6 is a schematic illustration of a sample in one embodiment of the invention;
FIG. 7 is a schematic representation of one of the wear conditions of the test specimens of the present invention;
FIG. 8 is a schematic representation of another wear condition of a test specimen according to the present invention;
fig. 9 is a schematic view of the brushing depth of the wheel brush.
Reference numerals: 101-workpiece, 102-tool, 103-first drive mechanism, 104-wheel brush, 105-brush shaft, 106-brush, 107-sample, 108-mount, 109-abrasive, 110-brushing section, 111-mount, 112-flank, 113-rake, 114-edge, 115-wear zone.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The bonding strength of the coating directly measured by the detection method of the invention refers to the bonding strength between the coating and the sample substrate in the sample. The method for detecting the bonding strength of the coating can be used for detecting the bonding strength of the diamond coating, and can also be used for detecting the bonding strength of other types of coatings.
Referring to fig. 1, the invention provides a method for detecting the bonding strength of a coating, comprising the following steps:
s10: the wheel brush 104 is driven to rotate around the axis of the brush shaft 105, and the area of the sample 107 having a coating is brushed by the rotating wheel brush 104.
S20: the wear of the sample 107 was obtained and the bond strength of the coating was determined from the wear.
"brushing" in the context of the present invention refers to the use of a brush to abrade an article (e.g., to abrade a sample 107 with a wheel brush 104). Referring to fig. 3, the wheel brush 104 in the above-described inspection method includes a brush shaft 105, bristles 106, and abrasive grains 109. The brush bristles 106 are attached to the outer circumferential surface of the brush shaft 105 and protrude in the radial direction of the brush shaft 105. Referring to fig. 4, abrasive particles 109 are attached to the outer surface of the bristles 106. The bristles 106 are provided in a plurality, and each bristle 106 is provided with a plurality of abrasive particles 109. Referring to fig. 3, in step S10, when the sample 107 is brushed, the end of the brush 106 away from the brush shaft 105 contacts the sample 107, and the abrasive grains 109 on the brush 106 also contact the sample 107. The hardness of the material of the abrasive particles 109 is greater than the hardness of the material of the bristles 106, and it is the abrasive particles 109 that are the primary cause of wear to the coating.
To facilitate an explanation of the effectiveness of the coating bond strength test method of the present invention, the following description is provided for the tool 102 and the test specimen 107 used in the test.
Fig. 2 shows the way in which the tool 102 machines the workpiece 101, fig. 2 being seen as a view looking along the axis of the workpiece 101. The workpiece 101 rotates around its axis, and during the rotation of the workpiece 101, the tool 102 cuts off a part of the material of the workpiece 101, thereby performing cutting work on the workpiece 101.
The test sample 107 includes a test sample substrate and a coating, at least a portion of the exterior of the test sample substrate being provided with the coating. Since the bond strength of the coating of the sample 107 was tested to investigate the performance of the tool 102, the coating of the sample 107 may be provided as the same coating as the coating of the tool 102, and the sample substrate of the sample 107 may be made of the same material as the substrate of the tool 102. For example, to investigate the performance of diamond coated tools, the coating of sample 107 was provided as a diamond coating, and the sample substrate was the same material as the substrate of the diamond coated tool. In addition, the bonding process of the coating and the sample substrate in the sample 107 may be set to be the same as the bonding process between the coating and the substrate in the tool 102.
Comparing fig. 2 and 3, the wheel brush 104 moves relative to the sample 107 in a manner similar to the movement of the workpiece 101 relative to the tool 102 when the wheel brush 104 brushes the sample 107. Accordingly, the load condition of the coating of the sample 107 during brushing by the wheel brush 104 is highly similar to the load condition of the coating of the tool 102 when in contact with the workpiece 101. Therefore, the method for detecting the bonding strength of the coating can well simulate the situations of abrasion and failure of the coating on the cutter 102 in the actual use process of the cutter 102, and the bonding strength of the coating of the sample 107 measured by the method can well reflect the actual bonding strength of the coating on the cutter 102.
In an embodiment, the coating of the test specimen 107 to be tested is provided as a diamond coating, and accordingly, the abrasive grains 109 may be made of diamond. The abrasive grains 109 made of diamond can effectively cause abrasion to the diamond coating, and the abrasion effect to the diamond coating is remarkable. Therefore, in the case where the abrasive grains 109 are made of diamond, the above-described detection method is suitable for detecting the bonding strength of the diamond coating. And the material of the bristles 106 may be nylon.
In other embodiments, if the coating in the test piece 107 is not a diamond coating but is another type of coating, the abrasive particles 109 in the wheel brush 104 may still be provided as diamond abrasive particles. Of course, the material of the abrasive grains 109 may be adjusted to another material that can effectively abrade the coating layer and has a significant abrasion effect, depending on the specific type of coating layer. For example, the abrasive particles 109 may be made of silicon carbide (SiC), or alternatively, the abrasive particles 109 may be made of corundum (Al) 2 O 3 ) And (4) preparing. The abrasive grains 109 made of silicon carbide or corundum have a hardness lower than that of the abrasive grains 109 made of diamond. When the coating of the tool 102 is provided as a coating having a hardness lower than that of the diamond coating, abrasive grains 109 having a hardness lower than that of diamond may be used. In addition, in order to obtain different wear effects, it is also conceivable to adjust the mesh number of the abrasive grains 109 or the diameter of the abrasive grains 109.
As shown in fig. 2, during the cutting process of the tool 102 on the workpiece 101, the main part of the tool 102 that is worn is the blade. The coating bond strength at the edge has a greater impact on the performance and life of the tool 102 than at locations of the tool 102 that do not come into contact with the workpiece 101. In order to make the coating bonding strength measured by the detection method better reflect the coating bonding strength at the cutting edge of the cutting tool 102, in an embodiment, the step S10 specifically includes: the wheel brush 104 is caused to brush the edge 114. Specifically, as shown in fig. 5, the sample 107 includes an edge 114, the edge 114 includes a rake surface 113 and a flank surface 112, the rake surface 113 and the flank surface 112 are both provided with a coating, and the rake surface 113 and the flank surface 112 intersect to form the edge 114.
Referring to fig. 5, when the wheel brush 104 brushes the edge 114, the brush 106 and the abrasive grains 109 on the brush 106 contact both the edge formed by the intersection of the rake surface 113 and the flank surface 112 and the end of the rake surface 113 and the end of the flank surface 112. As shown in fig. 5, further, in order to make the measured coating bonding strength better reflect the coating bonding strength at the blade edge of the cutter 102, the included angle between the flank surface 112 and the bristle moving direction is set to be the same as the cutter relief angle when the cutter 102 is actually used, and the included angle between the rake surface 113 and the bristles 106 is set to be the same as the cutter rake angle when the cutter 102 is actually used.
In some embodiments, the step S20 of the coating bonding strength detection method, acquiring the wear condition of the sample 107 may include: dimensional parameters of the worn region 115 of the specimen 107 are obtained. Therefore, the abrasion degree of the coating can be quantified, and the bonding strength of the coating can be conveniently evaluated.
The location of the wear region 115 can be referenced to fig. 6 or fig. 7. The wear region 115 refers to the area of the coupon 107 where the coating was originally disposed but was removed. The sample substrate will be directly exposed in the wear region 115. The dimensional parameters of the worn area 115 may be automatically obtained by some visual inspection device to achieve an automatic detection of the coating bond strength. The visual inspection device collects an image of the worn region 115, analyzes the image, identifies the worn region 115 by the difference in color between the worn region 115 and the non-mode region, and then automatically calculates the dimensional parameters of the worn region 115. Of course, obtaining the size parameter of the worn area 115 may be achieved by manually measuring the worn area 115.
In an embodiment, the dimensional parameter to capture the wear region 115 may be an area to capture the wear region 115. In another embodiment, if the shape of the wear region 115 is irregular, it is relatively simple to obtain the dimension parameters of the wear region 115, such as the length L of the wear region 115 and the width W of the wear region 115 (as shown in fig. 6).
After obtaining the dimensional parameters of the worn region 115, the bond strength of the coating can be determined based on the values of the dimensional parameters. For example, when the length of the wear region 115 is in a first interval and the width of the wear region 115 is in a second interval, the bond strength of the coating is a first strength; when the length of the wear region 115 is in the third interval and the width of the wear region 115 is in the fourth interval, the bond strength of the coating is the second strength. That is, the bond strength of the coating is different when the dimensional parameters of the wear region 115 are in different intervals. The actual meaning of "first strength" and "second strength" herein may be numerical values indicating the level of the bonding strength of the coating layer, or words such as "first level" and "second level" that can distinguish the bonding strength levels.
In addition, if the coating bonding strength of two samples 107 needs to be compared, the size parameters of the worn areas 115 of the two samples 107 can be directly compared. For example, if the length and width of the worn region 115 of one sample 107 were greater than the length and width of the worn region 115 of another sample 107, the bond strength of the coating of the previous sample 107 would be lower.
The invention also provides a sample brushing device which can assist in realizing the coating bonding strength detection method and improve the convenience of brushing the sample 107.
Referring to fig. 3 and 4, the sample brushing apparatus includes a mount 108, a wheel brush 104, and a first drive mechanism 103. The mounting seat 108 is used for accommodating a part of the sample 107, and the part of the sample 107 needing to be brushed is exposed out of the mounting seat 108. The wheel brush 104 includes a brush shaft 105, bristles 106, and abrasive grains 109, the bristles 106 are attached to an outer peripheral surface of the brush shaft 105 and project in a radial direction of the brush shaft 105, the abrasive grains 109 are attached to an outer surface of the bristles 106, and an end of the bristles 106 remote from the brush shaft 105 is used for contacting a test sample 107. The first driving mechanism 103 is connected with the brush shaft 105, and the first driving mechanism 103 is used for driving the wheel type brush 104 to rotate around the axis of the brush shaft 105. The first driving mechanism 103 may include a motor, which may be connected to the brush shaft 105 through a coupling, or may be connected to the brush shaft 105 through a transmission member such as a gear train or a transmission belt. The motor drives the wheel brush 104 to rotate, thereby driving the wheel brush 104 to brush the sample 107.
As shown in fig. 8, in one embodiment, the coupon 107 may include a mounting segment 111 and a brushing segment 110, the mounting segment 111 being located at one of the ends of the coupon 107. The brushing section 110 is the portion of the sample 107 brushed by the wheel brush 104, the brushing section 110 is exposed from the mounting block 108, and the brushing section 110 is provided with a coating. The mounting section 111 is used for connecting with the mounting seat 108, the mounting section 111 is generally not contacted with the wheel brush 104, and whether the mounting section 111 is provided with a coating or not can be realized.
In some embodiments, the mount 108 may include a clamp that includes two clamp blocks (not shown) that are movable relative to each other to move toward and away from each other. When it is desired to mount the sample 107 to the mount 108, two clamping blocks may be made to clamp the sample 107 (e.g., clamp the mounting section 111 of the sample 107); when it is desired to remove the sample 107, the two clamping blocks may be moved away from each other, thereby releasing the sample 107. In other embodiments, the mounting block 108 may also be provided with a mounting slot or hole into which a portion of the test piece 107 (e.g., the mounting segment 111) is inserted, thereby securing the test piece 107 relative to the mounting block 108.
In one embodiment, the sample brushing apparatus further comprises a second driving mechanism (not shown) connected to the first driving mechanism 103 or the mounting seat 108, and configured to drive the wheel brush 104 and the mounting seat 108 toward and away from each other in a radial direction of the brush shaft 105, thereby driving the wheel brush 104 and the sample 107 toward and away from each other. The second driving mechanism may be configured as a linear module, and for example, as shown in fig. 3, the second driving mechanism may drive the mounting seat 108 to move in the left-right direction.
When the sample 107 is not mounted to the mount 108, the mount 108 is spaced further from the wheel brush 104, which facilitates the user in mounting the sample 107 to the mount 108. After the sample 107 is mounted in the mounting block 108, the second drive mechanism drives the wheel brush 104 and the sample 107 toward each other until the wheel brush 104 contacts the sample 107. After the brushing is complete, the second drive mechanism may drive the wheel brush 104 and the test sample 107 away from each other to allow the user to remove the test sample 107 from the mounting block 108. That is, the second drive mechanism facilitates the mounting and dismounting of the sample 107.
In addition, the arrangement of the second driving mechanism is also beneficial to adjusting the brushing depth of the wheel brush 104, so as to adjust the brushing force and the brushing effect on the test sample 107. The brushing depth can be understood with the aid of fig. 9. Let the length of the brush 106 be denoted as D 1 When the wheel brush 104 brushes the sample 107, the distance between the brush shaft 105 and the portion of the sample 107 that contacts the brush 106 is D 2 And the brushing depth is recorded as D 3 Then brushing depth D 3 Satisfies the following conditions: d 3 ＝D 1 -D 2 . In addition, D is 1 、D 2 、D 3 Are all the size (D) in the radial direction of the brush shaft 105 1 、D 2 、D 3 Not shown in the figure). The brushing depth is related to the brushing effect, and the brushing depth differs, the interaction force between the brush bristles 106 and the sample 107 differs, and the brushing effect of the wheel brush 104 on the sample 107 also differs. The wheel brush 104 has a good brushing effect on the sample 107, which means that the wheel brush 104 can cause significant wear to the sample 107 in a short time. In the case where the second driving mechanism is provided, by controlling the operation of the second driving mechanism, the distance between the sample 107 and the wheel brush 104 can be controlled, thereby controlling the brushing depth and adjusting the brushing effect.
In the description of the present invention, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (9)
1. The method for detecting the bonding strength of the coating is characterized by comprising the following steps:
driving a wheel type brush to rotate around the axis of a brush shaft, and brushing and grinding the area of the sample with the coating by using the rotating wheel type brush; the wheel type hairbrush comprises a brush shaft, bristles and abrasive particles, wherein the bristles are connected to the outer peripheral surface of the brush shaft and protrude in the radial direction of the brush shaft, and the abrasive particles are connected to the outer surfaces of the bristles;
and acquiring the abrasion condition of the sample, and determining the bonding strength of the coating according to the abrasion condition.
2. The method for detecting the bonding strength of the coating according to claim 1, wherein the sample comprises a rake face and a flank face, the rake face and the flank face are both provided with the coating, and the rake face and the flank face intersect to form an edge;
the brushing of the area of the sample with the coating by the rotating wheel type brush comprises the following steps: and enabling the wheel type brush to brush and grind the edge.
3. The method for detecting the bonding strength of the coating according to claim 1 or 2, wherein the acquiring the wear condition of the sample comprises: and acquiring the size parameters of the worn area of the sample.
4. The method for detecting the bonding strength of the coating according to claim 3, wherein the obtaining of the size parameters of the worn area of the sample comprises: the length of the wear area is obtained and the width of the wear area is obtained.
5. The method for detecting the bonding strength of the coating according to claim 3, wherein the obtaining of the size parameters of the worn area of the sample comprises: and acquiring an image of the worn area and acquiring the size parameter by a visual detection device.
6. Sample brushing device, its characterized in that includes:
the mounting seat is used for accommodating a sample with a coating arranged on the surface;
the wheel type brush comprises a brush shaft, bristles and abrasive particles, the bristles are connected to the outer peripheral surface of the brush shaft and protrude in the radial direction of the brush shaft, the abrasive particles are connected to the outer surfaces of the bristles, and one ends of the bristles, far away from the brush shaft, are used for being in contact with the surface of the test sample;
the first driving mechanism is connected with the brush shaft and used for driving the wheel type hairbrush to rotate around the axis of the brush shaft.
7. The sample scrubbing apparatus according to claim 6, further comprising a second drive mechanism, said first drive mechanism or said mounting block being connected to said second drive mechanism, said second drive mechanism being adapted to drive said wheel brush and said mounting block toward or away from each other in a radial direction of said brush axis.
8. The sample brushing device according to claim 7, wherein said mounting block is coupled to said second drive mechanism, said mounting block comprising two clamping blocks that can be moved toward or away from each other, said clamping blocks being capable of clamping together a portion of said sample.
9. The sample brushing device according to claim 6, wherein the abrasive particles are made of diamond, silicon carbide, or corundum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211665276.2A CN115876688A (en) | 2022-12-23 | 2022-12-23 | Coating bonding strength detection method and sample brushing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211665276.2A CN115876688A (en) | 2022-12-23 | 2022-12-23 | Coating bonding strength detection method and sample brushing device |
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| CN115876688A true CN115876688A (en) | 2023-03-31 |
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| CN202211665276.2A Pending CN115876688A (en) | 2022-12-23 | 2022-12-23 | Coating bonding strength detection method and sample brushing device |
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| CN (1) | CN115876688A (en) |
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- 2022-12-23 CN CN202211665276.2A patent/CN115876688A/en active Pending
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