Method and system for testing binding force of metal coating

Abstract

The invention discloses a metal coating binding force testing method and system, and relates to the technical field of surface protection, and the method comprises the following steps: carrying out ultrasonic cleaning on a to-be-tested sample piece for a preset time based on an ultrasonic cleaning machine, and observing whether a metal coating of the to-be-tested sample piece falls off or not after the ultrasonic cleaning is finished; the to-be-tested sample piece is a sample piece of which the surface of a matrix is plated with a metal coating; detecting the binding force between the metal coating and the surface of the substrate based on a scratch tester when the external stress direction of the to-be-detected sample piece is vertical to the metal coating and is inward; and applying pressure to the metal coating of the to-be-tested sample processed into the preset shape based on an electronic universal material testing machine to obtain a loading force-displacement curve, and determining the binding force between the metal coating and the surface of the substrate when the external stress direction is perpendicular to the outward direction of the metal coating based on the loading force-displacement curve. The technical problems that in the prior art, the testing process is complex, the period is long, and the testing precision is insufficient are solved.

Description

Technical Field

[0001] The invention relates to the technical field of surface protection, and in particular to a method and system for testing the bonding strength of a metal coating. Background Art

[0002] In recent years, with the continuous development of high-precision science and technology, the demand for material surface performance has continued to increase. Plating, as the simplest and most effective method, can not only improve the corrosion resistance and wear resistance of the material surface, but also meet various performance requirements of applications in other fields such as magnetism, catalysis, and electronics. The bonding strength of the coating determines the adhesion performance of the coating on the substrate and is one of the important indicators for evaluating the quality of the coating. Among the existing testing technologies, commonly used coating bonding strength test methods include scratch test, pull-off test, and bending test. However, these methods have certain limitations, such as complex testing process, long cycle, and insufficient test accuracy. Summary of the invention

[0003] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention provides a method and system for testing the bonding strength of metal coatings. The technical solution is as follows:

[0004] On the one hand, a method for testing the bonding strength of a metal coating is provided, the method comprising any one of the following steps or a combination of multiple steps: using an ultrasonic cleaning machine to perform ultrasonic cleaning on a test sample for a preset time, and observing whether the metal coating of the test sample falls off after the cleaning is completed; the test sample is a sample with the metal coating plated on the surface of a substrate; using a scratch meter to detect the bonding strength between the metal coating and the surface of the substrate when the direction of the external stress of the test sample is perpendicular to the metal coating and inward; using an electronic universal material testing machine to apply pressure to the metal coating of the test sample processed into a preset shape to obtain a loading force-displacement curve, and based on the loading force-displacement curve, determining the bonding strength between the metal coating and the surface of the substrate when the direction of the external stress is perpendicular to the metal coating and outward.

[0005] Furthermore, the preset time includes 300s-1200s.

[0006] Furthermore, the scratch meter detects the bonding force between the metal coating and the surface of the substrate when the direction of the external stress of the sample to be tested is perpendicular to the metal coating and inward, including: using the probe of the scratch meter to scratch along the surface of the metal coating, and recording the target load corresponding to the surface cracking moment of the metal coating; determining the target load as the bonding force between the metal coating and the surface of the substrate.

[0007] Furthermore, the probe comprises a diamond probe; and the loading rate of the probe on the surface of the metal coating comprises 5N / min-20N / min.

[0008] Furthermore, the loading rate at which the electronic universal material testing machine applies pressure to the metal coating includes 1 mm / min.

[0009] On the other hand, a metal coating bonding strength testing system is also provided, comprising: an ultrasonic detection module, a scratch tester detection module and a testing machine detection module; wherein the ultrasonic detection module is used to perform ultrasonic cleaning on a test sample for a preset time based on an ultrasonic cleaning machine, and observe whether the metal coating of the test sample has fallen off after the cleaning is completed; the test sample is a sample with the metal coating plated on the surface of a substrate; the scratch tester detection module is used to detect the bonding strength between the metal coating and the substrate surface when the direction of the external stress of the test sample is perpendicular to the metal coating and inward based on the scratch tester; the testing machine detection module is used to apply pressure to the metal coating of the test sample processed into a preset shape based on an electronic universal material testing machine to obtain a loading force-displacement curve, and determine the bonding strength between the metal coating and the substrate surface when the direction of the external stress is perpendicular to the metal coating and outward based on the loading force-displacement curve.

[0010] Furthermore, the scratch meter detection module is also used to: use the scratch meter's probe to scratch along the surface of the metal coating, record the target load corresponding to the surface cracking moment of the metal coating; determine the target load as the bonding force between the metal coating and the substrate surface.

[0011] On the other hand, an electronic device is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method provided by the present invention when executing the computer program.

[0012] On the other hand, a computer-readable storage medium is provided, in which a program code is stored. The program code can be called by a processor to execute the method provided by the present invention.

[0013] The embodiment of the present invention provides a method and system for testing the bonding strength of a metal coating, which uses an ultrasonic cleaning machine to perform a preliminary test on the bonding strength of the metal coating of a test sample, and then uses a scratch tester and an electronic universal material testing machine to test the bonding strength between the metal coating and a substrate in different directions. The maximum loading force that the coating and the substrate can withstand when the stress direction is perpendicular to the coating outward and inward can be obtained, thereby achieving rapid and accurate testing of the bonding strength of the coating, and alleviating the technical problems of the prior art such as complex testing process, long cycle, and insufficient testing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a flow chart of a method for testing the bonding strength of a metal coating provided by an embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of using an electronic universal material testing machine to test a sample to be tested that is processed into a preset shape, provided by an embodiment of the present invention;

[0017] Figure 3 It is a schematic diagram of a metal coating bonding strength testing system provided in an embodiment of the present invention.

[0018] In the figure: 1. fixture, 2. substrate, 3. metal coating, 4. testing machine parts. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

[0020] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.

[0021] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0022] Embodiment 1

[0023] Figure 1 1 is a flow chart of a method for testing the bonding strength of a metal coating provided according to an embodiment of the present invention. Figure 1 As shown, the method specifically includes any one of the following steps or a combination of multiple steps:

[0024] Step S102, using an ultrasonic cleaning machine to perform ultrasonic cleaning on the sample to be tested for a preset time, and then observing whether the metal coating of the sample to be tested falls off after the cleaning is completed; the sample to be tested is a sample with a metal coating on the surface of the substrate.

[0025] Step S104, using a scratch tester to detect the bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inward.

[0026] Preferably, the preset time includes 300s-1200s.

[0027] Specifically, step S104 also includes the following steps:

[0028] Step S1041, using a probe of a scratch tester to scratch along the surface of the metal coating, and recording a target load corresponding to the moment of surface cracking of the metal coating;

[0029] Step S1042: determining the target load as the bonding force between the metal coating and the substrate surface.

[0030] Preferably, the probe comprises a diamond probe; and the loading rate of the probe on the surface of the metal coating comprises 5N / min-20N / min.

[0031] Step S106, applying pressure to the metal coating of the test sample processed into a preset shape by an electronic universal material testing machine to obtain a loading force-displacement curve, and determining the bonding force between the metal coating and the substrate surface when the external stress direction is perpendicular to the metal coating and outward based on the loading force-displacement curve.

[0032] Figure 2 FIG. 1 is a schematic diagram of using an electronic universal material testing machine to test a sample processed into a preset shape according to an embodiment of the present invention. Figure 2 As shown in the figure, the sample to be tested is first processed into Figure 2 The shape of the substrate 2 is shown, and is placed in the fixture 1 of the testing machine for fixing. Then the testing machine component 4 is controlled to slowly apply pressure to the upper surface of the metal coating 3 of the sample to be tested, and the loading force-displacement curve of the test process is recorded.

[0033] Preferably, the loading rate at which the electronic universal materials testing machine applies pressure to the metal coating comprises 1 mm / min.

[0034] The method provided in the embodiment of the present invention may include any of the above steps S102 to S106 according to different types of samples to be tested. For example, the detection method based on an ultrasonic cleaning machine in step S102 may be used to detect whether the metal coating of the sample to be tested falls off under the action of ultrasonic waves, or the detection method in step S104 or step S106 may be used to determine the bonding force between the metal coating of the sample to be tested and the substrate surface;

[0035] It may also include a combination of any two steps from step S102 to step S106 or all of the steps to test the sample to be tested in sequence.

[0036] For example, by combining step S102 and step S104, an ultrasonic cleaning machine is first used to perform ultrasonic peeling detection on the sample to be tested, and then a scratch tester is used to detect the bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inward.

[0037] For example, by combining step S102 and step S106, an ultrasonic cleaning machine is first used to perform ultrasonic peeling detection on the sample to be tested, and then an electronic universal material testing machine is used to detect the loading force-displacement curve of the sample to be tested, so as to further determine the bonding force between the metal coating and the substrate surface when the direction of the external stress is perpendicular to the metal coating and outward.

[0038] For example, by combining step S104 and step S106, a scratch tester is first used to detect the bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inward, and then an electronic universal material testing machine is used to detect the loading force-displacement curve of the sample to be tested to further determine the bonding force between the metal coating and the substrate surface when the external stress direction is perpendicular to the metal coating and outward.

[0039] For example, all the tests in step S102 to step S106 are performed on the test sample in sequence. First, an ultrasonic cleaning machine is used to perform ultrasonic shedding test on the test sample. Then, a scratch tester is used to detect the bonding force between the metal coating and the substrate surface when the external stress direction of the test sample is perpendicular to the metal coating and inward. Finally, an electronic universal material testing machine is used to detect the loading force-displacement curve of the test sample to further determine the bonding force between the metal coating and the substrate surface when the external stress direction is perpendicular to the metal coating and outward.

[0040] From the above description, it can be seen that an embodiment of the present invention provides a method for testing the bonding strength of a metal coating, which uses an ultrasonic cleaning machine to perform a preliminary test on the bonding strength of the metal coating of the test sample, and then uses a scratch tester and an electronic universal material testing machine to test the bonding strength between the metal coating and the substrate in different directions. The maximum loading force that the coating and the substrate can withstand when the stress direction is perpendicular to the coating outward and inward can be obtained, thereby achieving rapid and accurate testing of the bonding strength of the coating.

[0041] Embodiment 2

[0042] Take the titanium coating sample, place it in an ultrasonic cleaning machine, and perform ultrasonic cleaning for 600s. After the ultrasonic cleaning is completed, take it out to observe whether the surface coating is qualified. Then, use the scratch meter probe to scratch along the coating surface, with a loading rate of 10N / min, and record the corresponding load at the moment of interface cracking to obtain the bonding force between the film layer and the substrate when the external stress direction is perpendicular to the coating inward; after the test, the sample is processed into the shape to be tested, placed in an electronic universal material testing machine, and pressure is applied to the coating. According to the loading force-displacement curve of the testing machine, the bonding force between the film layer and the substrate when the external stress direction is perpendicular to the coating outward can be obtained.

[0043] Embodiment 3

[0044] Take the copper-plated sample, place it in an ultrasonic cleaning machine, and perform ultrasonic cleaning for 900 seconds. After the ultrasonic cleaning is completed, take it out to observe whether the surface coating is qualified. Then, use the scratch meter probe to scratch along the coating surface, with a loading rate of 20N / min, and record the corresponding load at the moment of interface cracking to obtain the bonding force between the film layer and the substrate when the external stress direction is perpendicular to the coating inward; after the test, the sample is processed into the shape to be tested, placed in an electronic universal material testing machine, and pressure is applied to the coating. According to the loading force-displacement curve of the testing machine, the bonding force between the film layer and the substrate when the external stress direction is perpendicular to the coating outward can be obtained.

[0045] Embodiment 4

[0046] Take the nickel-plated sample, place it in an ultrasonic cleaning machine, and perform ultrasonic cleaning for 1200s. After the ultrasonic cleaning is completed, take it out to observe whether the surface coating is qualified. Then, use the scratch meter probe to scratch along the coating surface, with a loading rate of 5N / min, and record the corresponding load at the moment of interface cracking to obtain the bonding force between the film layer and the substrate when the external stress direction is perpendicular to the coating inward; after the test, the sample is processed into the shape to be tested, placed in an electronic universal material testing machine, and pressure is applied to the coating. According to the loading force-displacement curve of the testing machine, the bonding force between the film layer and the substrate when the external stress direction is perpendicular to the coating outward can be obtained.

[0047] Embodiment 5

[0048] Figure 3 Schematic diagram of a metal coating bonding strength testing system provided according to an embodiment of the present invention. Figure 3 As shown, the system includes: an ultrasonic detection module 10, a scratch meter detection module 20 and a testing machine detection module 30.

[0049] Specifically, the ultrasonic detection module 10 is used to perform ultrasonic cleaning on the sample to be tested for a preset time using an ultrasonic cleaning machine, and observe whether the metal coating of the sample to be tested falls off after the cleaning is completed; the sample to be tested is a sample with a metal coating on the surface of the substrate;

[0050] The scratch tester detection module 20 is used to detect the bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inward.

[0051] The testing machine detection module 30 is used to apply pressure to the metal coating of the test sample processed into a preset shape based on an electronic universal material testing machine to obtain a loading force-displacement curve, and determine the bonding force between the metal coating and the substrate surface when the external stress direction is perpendicular to the metal coating and outward based on the loading force-displacement curve.

[0052] Specifically, the scratch tester detection module 20 is also used for:

[0053] Use the probe of the scratch tester to scratch along the surface of the metal coating, and record the target load corresponding to the moment when the surface of the metal coating cracks;

[0054] The target load is determined as the bonding force between the metal coating and the substrate surface.

[0055] The present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method provided in the embodiment of the present invention when executing the computer program.

[0056] The present invention further provides a computer-readable storage medium, in which program codes are stored. The program codes can be called by a processor to execute the method provided in the embodiment of the present invention.

[0057] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0058] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described equipment, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0059] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for testing the bonding strength of a metal coating, characterized in that: The method comprises any one of the following steps or a combination of several steps: Using an ultrasonic cleaning machine to perform ultrasonic cleaning on the sample to be tested for a preset time, and after the cleaning is completed, observing whether the metal coating of the sample to be tested falls off; the sample to be tested is a sample with the metal coating coated on the surface of the substrate; The bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inward is detected by a scratch tester; Based on an electronic universal material testing machine, pressure is applied to the metal coating of the sample to be tested which is processed into a preset shape to obtain a loading force-displacement curve, and based on the loading force-displacement curve, the bonding force between the metal coating and the surface of the substrate when the direction of the external stress is perpendicular to the metal coating and outward is determined.

2. The method according to claim 1, characterized in that The preset time includes 300s-1200s.

3. The method according to claim 1, characterized in that The bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inwardly detected by the scratch tester includes: Using the probe of the scratch tester to scratch along the surface of the metal coating, and recording the target load corresponding to the moment when the surface of the metal coating cracks; The target load is determined as the bonding force between the metal coating and the substrate surface.

4. The method according to claim 3, characterized in that The probe comprises a diamond probe; and the loading rate of the probe on the surface of the metal coating comprises 5N / min-20N / min.

5. The method according to claim 1, characterized in that The loading rate at which the electronic universal material testing machine applies pressure to the metal coating includes 1 mm / min.

6. A metal coating bonding strength testing system, characterized in that: include: Ultrasonic testing module, scratch tester testing module and testing machine testing module; among them, The ultrasonic detection module is used to perform ultrasonic cleaning on the sample to be tested for a preset time using an ultrasonic cleaning machine, and observe whether the metal coating of the sample to be tested falls off after the cleaning is completed; the sample to be tested is a sample with the metal coating plated on the surface of the substrate; The scratch tester detection module is used to detect the bonding force between the metal coating and the substrate surface when the external stress direction of the sample to be tested is perpendicular to the metal coating and inwards based on the scratch tester; The testing machine detection module is used to apply pressure to the metal coating of the sample to be tested that is processed into a preset shape based on an electronic universal material testing machine to obtain a loading force-displacement curve, and determine the bonding force between the metal coating and the surface of the substrate when the direction of the external stress is perpendicular to the metal coating and outward based on the loading force-displacement curve.

7. The system according to claim 6, characterized in that The scratch tester detection module is also used for: Using the probe of the scratch tester to scratch along the surface of the metal coating, and recording the target load corresponding to the moment when the surface of the metal coating cracks; The target load is determined as the bonding force between the metal coating and the substrate surface.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 5 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, which can be called by a processor to execute the method according to any one of claims 1 to 5.

Images