Method and device for predicting shear strength of diamond brazed joint

Abstract

The invention provides a shear strength prediction method and device for a diamond brazed joint, and the method comprises the steps: obtaining at least two target types of diamond samples with the same size for a target type of diamond, measuring the first brazed surface area of the first diamond sample, and calculating the first brazed surface area of the second diamond sample; performing target shape texture surface treatment on the first diamond sample by adopting preset surface treatment process parameters to obtain the textured first diamond sample, calculating the area of a second brazing surface of the textured first diamond sample, and performing brazing on the second diamond sample based on a preset brazing process, and performing shear strength testing on the brazed joint to obtain the actual shear strength of the brazed joint without surface treatment, and predicting the predicted shear strength of the target type of diamond under different surface textures based on a preset shear strength prediction formula, the first brazed surface area, the second brazed surface area and the actual shear strength.

Description

Technical Field

[0001] The present application relates to the technical field of carbon material surface treatment and brazing, and in particular to a method and device for predicting the shear strength of a diamond brazed joint. Background Art

[0002] During the fabrication of optical windows, CVD diamonds must be bonded to a metal substrate to meet the demands of diverse and complex applications. Therefore, the precise bonding process between the diamond material and the substrate is crucial. Brazing, with its advantages of low heat input and minimal impact on the base material, is currently the most effective method for achieving high-strength, airtight, and reliable diamond connections for optical windows.

[0003] Currently, surface texture construction is often performed on diamond to improve the quality of diamond brazed joints.

[0004] However, the current construction of diamond surface textures relies on experiments and tests to determine the actual shear strength of diamonds, which is costly and labor-intensive. Furthermore, it can easily lead to diamond waste, further increasing production costs. Summary of the Invention

[0005] In view of this, the purpose of the present application is to provide a method and device for predicting the shear strength of a diamond brazed joint, by preparing at least two diamond samples of the same size as the target model, surface treating the first diamond sample to obtain the brazing surface area of ​​the first diamond sample before and after the texture, and brazing the second diamond sample to calculate the actual shear strength of the brazed joint without surface treatment. Based on this prediction, the predicted shear strength of the target model diamond under different surface textures can be directly determined by a small diamond sample to determine whether the surface texture of the target diamond meets the expected requirements, which is convenient for guiding the construction of the diamond surface texture in actual production, reducing the waste of expensive diamonds, especially in the welding of large-sized diamonds, saving production costs and reducing energy expenditure.

[0006] In a first aspect, an embodiment of the present application provides a method for predicting the shear strength of a diamond brazed joint, the method comprising: For a target diamond model, obtaining at least two diamond samples of the same size as the target model; wherein the diamond samples represent small diamonds; Measuring a first brazing surface area of ​​a first diamond sample, performing a surface treatment on the first diamond sample to obtain a target shape texture using preset surface treatment process parameters, obtaining the textured first diamond sample, and calculating a second brazing surface area of ​​the textured first diamond sample; Brazing the second diamond sample based on the preset brazing process, and performing a shear strength test on the brazed joint to obtain the actual shear strength of the brazed joint without surface treatment; Based on the preset shear strength prediction formula and the first brazing surface area and the second brazing surface area 、 The actual shear strength is used to predict the shear strength of the target model of diamond under different surface textures.

[0007] In one possible implementation, the method further includes: When the predicted shear strength meets the preset shear strength standard, actual surface treatment and brazing are performed on diamonds of different sizes of the target model based on the target shape and texture; When the predicted shear strength does not meet the preset shear strength standard, the surface treatment process parameters are adjusted based on the predicted shear strength to obtain a new target shape texture, and the second brazing surface area is recalculated based on the new target shape texture until the predicted shear strength meets the shear strength standard.

[0008] In a possible implementation, the calculating the second brazing surface area of ​​the textured first diamond sample includes: Obtaining a cross section of the first diamond sample obtained by surface treatment and shape data of the cross section, and fitting the shape data to obtain a corresponding fitting function; The brazing surface area of ​​the textured first diamond sample is calculated based on the fitting function.

[0009] In a possible implementation, the surface treatment process parameters include at least the maximum width of a single texture and the depth of a single texture; the shear strength prediction formula is:

[0010] in, Indicates the predicted shear strength of the target model of diamond under different surface textures; Indicates the actual shear strength of the brazed joint without surface treatment; represents the second brazing surface area of ​​the first diamond sample after texturing; represents the first brazing surface area of ​​the first diamond sample; Indicates the maximum width of a single texture; represents the total length of the texture, Derived from actual measurement; y= represents the fitting function, y represents the depth of a single texture, Indicates the width of a single texture. represents the derivative function of the fitting function.

[0011] In a possible implementation, obtaining a cross section of the first diamond sample obtained by surface treatment and shape data of the cross section, and fitting the shape data to obtain a corresponding fitting function includes: Cutting the brazed joint after the surface treatment of the first diamond sample to obtain a textured cross-section of the first diamond sample, and grinding and polishing the cross-section to obtain a metallographic sample; Observe the metallographic sample using a preset scanning electron microscope, select a complete texture morphology and take a photo to obtain the required texture photo; The actual data of each point on the cross section is calculated based on the texture photograph, and the actual data is subjected to nonlinear fitting until convergence under a preset determination coefficient to obtain a corresponding fitting function.

[0012] In a possible implementation, the diamond is in the form of a thin sheet, and the infrared transmittance of the diamond is greater than a preset infrared transmittance threshold; The diamond has a diamond thickness, and in the fitting function y=f(x), y max Indicates the maximum depth of a single texture, y max Limited by the diamond thickness.

[0013] In a possible implementation, brazing the second diamond sample based on a preset brazing process includes: Grinding the surface of the preset metal substrate to remove the surface oxide film; Assembling the metal substrate, the target active brazing material and the second diamond sample to obtain a diamond brazing assembly; wherein the target active brazing material is an active brazing material determined by Ag, Cu and Ti; The diamond brazing assembly is brazed using a vacuum furnace according to a preset brazing process.

[0014] In a second aspect, an embodiment of the present application further provides a device for predicting the shear strength of a diamond brazed joint, the device comprising: A first acquisition module is configured to acquire at least two diamond samples of the same size as the target diamond model; wherein the diamond samples represent small diamonds; a second acquisition module, configured to measure the area of ​​a first brazing surface of a first diamond sample, perform surface treatment on the first diamond sample to obtain a target shape texture using preset surface treatment process parameters, obtain the textured first diamond sample, and calculate the area of ​​a second brazing surface of the textured first diamond sample; a third acquisition module, configured to braze the second diamond sample based on a preset brazing process, and perform a shear strength test on the brazed joint to obtain an actual shear strength of the brazed joint without surface treatment; A prediction module is used to predict the shear strength based on a preset shear strength prediction formula and the first brazing surface area and the second brazing surface area. 、 The actual shear strength is used to predict the shear strength of the target model of diamond under different surface textures.

[0015] In a possible implementation, the device further includes: a processing module, configured to perform actual surface treatment and brazing on diamonds of different sizes of the target model based on the target shape and texture when the predicted shear strength meets a preset shear strength standard; An adjustment module is used to adjust the surface treatment process parameters based on the predicted shear strength to obtain a new target shape texture when the predicted shear strength does not meet the preset shear strength standard, and recalculate the second brazing surface area based on the new target shape texture until the predicted shear strength meets the shear strength standard.

[0016] In a possible implementation manner, the second acquisition module is specifically configured to: Obtaining a cross section of the first diamond sample obtained by surface treatment and shape data of the cross section, and fitting the shape data to obtain a corresponding fitting function; The brazing surface area of ​​the textured first diamond sample is calculated based on the fitting function.

[0017] In a possible implementation, the surface treatment process parameters include at least the maximum width of a single texture and the depth of a single texture; the shear strength prediction formula is:

[0018] in, Indicates the predicted shear strength of the target model of diamond under different surface textures; Indicates the actual shear strength of the brazed joint without surface treatment; represents the second brazing surface area of ​​the first diamond sample after texturing; represents the first brazing surface area of ​​the first diamond sample; Indicates the maximum width of a single texture; represents the total length of the texture, Derived from actual measurement; y= represents the fitting function, y represents the depth of a single texture, Indicates the width of a single texture. represents the derivative function of the fitting function.

[0019] In a possible implementation manner, the second acquisition module is further specifically configured to: Cutting the brazed joint after the surface treatment of the first diamond sample to obtain a textured cross-section of the first diamond sample, and grinding and polishing the cross-section to obtain a metallographic sample; Observe the metallographic sample using a preset scanning electron microscope, select a complete texture morphology and take a photo to obtain the required texture photo; The actual data of each point on the cross section is calculated based on the texture photograph, and the actual data is subjected to nonlinear fitting until convergence under a preset determination coefficient to obtain a corresponding fitting function.

[0020] In a possible implementation, the diamond is in the form of a thin sheet, and the infrared transmittance of the diamond is greater than a preset infrared transmittance threshold; The diamond has a diamond thickness, and in the fitting function y=f(x), y max Indicates the maximum depth of a single texture, y max Limited by the diamond thickness.

[0021] In a possible implementation, the third acquisition module is specifically configured to: Grinding the surface of the preset metal substrate to remove the surface oxide film; Assembling the metal substrate, the target active brazing material and the second diamond sample to obtain a diamond brazing assembly; wherein the target active brazing material is an active brazing material determined by Ag, Cu and Ti; The diamond brazing assembly is brazed using a vacuum furnace according to a preset brazing process.

[0022] In a third aspect, an embodiment of the present application provides an electronic device comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the shear strength prediction method for diamond brazed joints as described in any one of the first aspects.

[0023] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for predicting the shear strength of a diamond brazed joint according to any one of the first aspects are executed.

[0024] The embodiment of the present application provides a method and device for predicting the shear strength of a diamond brazed joint. For a target model of diamond, at least two diamond samples of the same size of the target model are obtained, the first brazing surface area of ​​the first diamond sample is measured, the first diamond sample is surface treated with a target shape texture using preset surface treatment process parameters, the textured first diamond sample is obtained and the second brazing surface area of ​​the textured first diamond sample is calculated, the second diamond sample is brazed based on a preset brazing process, and the shear strength of the brazed joint is tested to obtain the actual shear strength of the brazed joint without surface treatment. Based on a preset shear strength prediction formula and the first brazing surface area and the second brazing surface area, the shear strength of the brazed joint is calculated. 、 Actual shear strength, predicting the predicted shear strength of the target model diamond under different surface textures. This application prepares at least two diamond samples of the same size of the target model, performs surface treatment on the first diamond sample to obtain the brazing surface area of ​​the first diamond sample before and after the texture, and calculates the actual shear strength of the brazed joint without surface treatment after brazing the second diamond sample. Based on this prediction, the predicted shear strength of the target model diamond under different surface textures can be directly determined by a small diamond sample to determine whether the surface texture of the target diamond meets the expected requirements. This facilitates the construction of diamond surface texture in actual production, reduces the waste of expensive diamonds, and especially saves production costs and reduces energy expenditure in the welding of large-sized diamonds.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a flow chart of a method for predicting the shear strength of a diamond brazed joint according to an embodiment of the present application; Figure 2 is a schematic diagram of the texture of the first diamond sample after surface treatment and a cross section of a single texture; Figure 3 is a schematic diagram of the fitting function; Figure 4 is a schematic diagram of a circular arc-shaped cross section of a grid-like surface texture; Figure 5It is a schematic diagram of the microscopic shape and specific data of the circular arc-shaped cross section of the grid-like surface texture; Figure 6 1 is a schematic structural diagram of a shear strength prediction device for a diamond brazed joint provided in accordance with an embodiment of the present application; Figure 7 This is a schematic structural diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0029] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0030] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0031] Considering that the fabrication process for optical windows generally requires joining CVD diamond to a metal substrate to meet the demands of extremely complex applications, the bonding process between the diamond material and the substrate is crucial. Brazing, with its advantages of low heat input and minimal impact on the parent material, is currently the most effective method for achieving high-strength, high-airtightness, and high-reliability diamond connections for optical windows.

[0032] Currently, surface texture creation is often performed on diamonds to guide the brazing process. However, this process relies on experiments and tests to determine the actual shear strength of diamonds, resulting in high production costs and considerable effort. Furthermore, this process can easily lead to diamond waste, further increasing production costs.

[0033] To address this problem, the present application provides a method and device for predicting the shear strength of a diamond brazed joint. The method comprises preparing at least two diamond samples of the same size as the target model, performing surface treatment on the first diamond sample to obtain the brazing surface area before and after the texture of the first diamond sample is formed, and then performing brazing on the second diamond sample to calculate the actual shear strength of the brazed joint without surface treatment. Based on this prediction, the predicted shear strength of the target model diamond under different surface textures can be directly determined by using a small diamond sample to determine whether the surface texture of the target diamond meets the expected requirements. This facilitates guiding the construction of the diamond surface texture in actual production, reduces the waste of expensive diamonds, and especially saves production costs and reduces energy expenditure in the welding of large-sized diamonds.

[0034] Figure 1 This is a flow chart of a method for predicting the shear strength of a diamond brazed joint according to an embodiment of the present application. Figure 1 As shown, the shear strength prediction method of the diamond brazed joint according to the embodiment of the present application may specifically include: S101. For a target diamond model, obtain at least two diamond samples of the target model and the same size.

[0035] S102, measuring the first brazing surface area of ​​the first diamond sample, performing surface treatment of the first diamond sample with a target shape texture using preset surface treatment process parameters, obtaining the textured first diamond sample, and calculating the second brazing surface area of ​​the textured first diamond sample.

[0036] S103. Brazing the second diamond sample based on a preset brazing process, and performing a shear strength test on the brazed joint to obtain an actual shear strength of the brazed joint without surface treatment.

[0037] S104, based on the preset shear strength prediction formula and the first brazing surface area and the second brazing surface area 、 Actual shear strength, predicting the shear strength of the target model of diamond under different surface textures.

[0038] In the above-mentioned method for predicting the shear strength of a diamond brazed joint, at least two diamond samples of the same size as the target model are prepared, the first diamond sample is surface treated to obtain the brazing surface area of ​​the first diamond sample before and after texturing, and the second diamond sample is brazed to calculate the actual shear strength of the brazed joint without surface treatment. Based on this prediction, the predicted shear strength of the target model diamond under different surface textures can be directly determined by a small diamond sample to determine whether the surface texture of the target diamond meets the expected requirements, which is convenient for guiding the construction of the diamond surface texture in actual production, reducing the waste of expensive diamonds, especially in the welding of large-sized diamonds, saving production costs and reducing energy expenditure.

[0039] The above exemplary steps of the embodiment of the present application are described below with reference to specific examples: S101, for a target model of diamond, obtaining at least two diamond samples of the target model and the same size.

[0040] In the embodiments of the present application, the target diamond type, i.e., the diamond used for brazing, is, for example, CVD diamond, in a thin flake form, with an infrared transmittance greater than a preset infrared transmittance threshold, e.g., 60%. Because such diamonds are relatively expensive, brazing all of them for shear strength testing and prediction is costly. Therefore, the present application prepares at least two diamond samples of the same size as the target diamond type, i.e., small diamond samples (e.g., 5 x 5 x 0.5 mm), for brazing to conduct shear strength testing and prediction of the target diamond type, thereby reducing costs.

[0041] S102, measuring the first brazing surface area of ​​the first diamond sample, performing surface treatment on the first diamond sample to obtain a target shape texture using preset surface treatment process parameters, obtaining the textured first diamond sample, and calculating the second brazing surface area S1 of the textured first diamond sample.

[0042] In the embodiment of the present application, the surface treatment process parameters are the parameters of the pre-set surface treatment process, and the surface treatment process parameters include at least the maximum width of a single texture and the depth of a single texture; a diamond sample is taken out as the first diamond sample, and the first brazing surface area of ​​the first diamond sample is measured (represented by S0), the target shape texture is the shape of the surface texture, for example, a grid shape, a regular arc shape, a ring shape, etc., and the first diamond sample is subjected to surface treatment of the target shape texture according to the surface treatment process parameters to obtain the first diamond sample after surface texture, and the second brazing surface area of ​​the textured first diamond sample (represented by S1) is calculated for subsequent processing. For example, Figure 2The two structures shown on the left and right are the texture of the first diamond sample after surface treatment and the cross-section of a single texture, respectively.

[0043] Optionally, the first diamond sample is surface treated with a target texture using a femtosecond laser of target power and preset surface treatment process parameters. The target power is a preferred femtosecond laser power determined in advance through experimentation and work experience, for example, 200 mJ. For example, a 200 mJ femtosecond laser is used to treat the surface of the first diamond sample to be brazed according to the surface treatment process parameters to obtain a grid-like surface texture.

[0044] Optionally, a surface to be brazed of the first diamond sample is determined; and a surface treatment of a target shape and texture is performed on the surface to be brazed of the first diamond sample using preset surface treatment process parameters.

[0045] As a possible implementation, when calculating the second brazing surface area S1 of the first diamond sample after texture, the cross section of the first diamond sample obtained by surface treatment and the shape data of the cross section are obtained, and the shape data are fitted to obtain a corresponding fitting function; the brazing surface area S1 of the first diamond sample after texture is calculated based on the fitting function. 1。

[0046] Optionally, after obtaining the cross-section of the first diamond sample obtained by surface treatment and the shape data of the cross-section, fitting the shape data to obtain a corresponding fitting function, cutting the brazed joint after surface treatment of the first diamond sample to obtain the cross-section after texture of the first diamond sample, and grinding and polishing the cross-section to obtain a metallographic sample; using a preset scanning electron microscope to observe the metallographic sample, selecting a complete texture morphology and photographing it to obtain the required texture photograph; calculating the actual data of each point on the cross-section based on the texture photograph, and performing nonlinear fitting on the actual data until convergence under a preset determination coefficient to obtain the corresponding fitting function.

[0047] Specifically, for example, the textured brazed joint after surface treatment is cut to obtain a cross section; the cut cross section is ground and polished to obtain a metallographic sample; the metallographic sample is observed using a scanning electron microscope, and a complete texture morphology is selected and photographed; the microscopic texture photo is processed to find the two endpoints of the texture and connect them (the left endpoint is the origin and the line segment is the X-axis to establish a coordinate system); several points are taken at equal distances on the line segment, and the X-axis coordinate (Xn) of each point is obtained, and then the height (Yn) of each point to the texture is measured; according to the scale of the picture, the actual data (X'n, Y'n) of each point (Xn, Yn) on the cross section is calculated; the obtained (X'n, Y'n) data is put into origin and the data is nonlinearly fitted until convergence and the determination coefficient R2 ≥ 0.95 to obtain the fitted function f(x), for example, Figure 3 shown.

[0048] For example, continuing to take the above-mentioned 5*5*0.5mm CVD diamond, i.e., the first diamond sample, as an example, after the surface to be brazed of the first diamond sample is treated by femtosecond laser according to the preset surface treatment process parameters, a grid-like surface texture is obtained. The cross section of the grid-like surface texture is a circular arc shape, such as Figure 4 As shown, the microscopic shape and specific data of the cross section are as follows Figure 5 As shown, these data are fitted, and the fitting result satisfies the fitting function y=1.19x-0.06x2-0.4, that is, y=f(x), where the units of x and y are μm. The brazing surface area S of the first diamond sample after texture can be calculated using this fitting function. 1。 S103, brazing the second diamond sample based on a preset brazing process, and performing a shear strength test on the brazed joint to obtain an actual shear strength σ0 of the brazed joint without surface treatment.

[0049] In the embodiment of the present application, the brazing process includes at least the brazing temperature and the holding time, for example, holding at 850°C for 10 minutes. The second diamond sample, i.e., the remaining diamond samples except the first diamond sample, the actual shear strength represents the actual shear strength of the brazed joint of the second diamond sample without surface texturing. The second diamond sample is brazed according to the brazing process, and the shear strength test of the brazed joint of the second diamond sample without surface treatment is performed to obtain the actual shear strength (represented by σ0) for subsequent processing.

[0050] Optionally, when brazing the second diamond sample according to a preset brazing process, the surface of the preset metal substrate is polished to remove the surface oxide film; the metal substrate, the target active brazing material, and the second diamond sample are assembled to form a diamond brazing assembly; and the diamond brazing assembly is brazed in a vacuum furnace according to the preset brazing process. The target active brazing material is an active brazing material selected from Ag, Cu, and Ti.

[0051] For example, the surface of a copper substrate is polished to remove the surface oxide film. Without adding hard particles to the texture, a diamond-AgCuTi active brazing filler metal and a Cu substrate are assembled sequentially. The workpieces are brazed in a vacuum furnace at 850°C for 10 minutes. After brazing, the workpieces are cooled and cleaned before the shear strength of the brazed joints is tested.

[0052] It should be noted that the microtexture increases the bonding interface between diamond and solder, increases the probability and area of ​​TiC reaction layer generation, weakens the impact of uncontrollable reaction of active solder, and improves the mechanical properties of the joint; microtextures of different depths optimize the original pure diamond reaction interface into a diamond-solder composite interface structure, the overall thermal expansion coefficient of the composite structure is improved, and a thermal expansion coefficient gradient is formed in the direction perpendicular to the brazing surface, which effectively relieves the interface residual stress and improves the mechanical strength of the joint.

[0053] S104, based on the preset shear strength prediction formula and the first brazing surface area and the second brazing surface area 、 Actual shear strength, predicting the shear strength of the target model of diamond under different surface textures.

[0054] In the embodiment of the present application, according to the preset shear strength prediction formula and the first brazing surface area S0 obtained in step S102, the second brazing surface area S1, and the actual shear strength obtained in step S103 , predict the predicted shear strength (expressed by σ1) of the target model of diamond under different surface textures.

[0055] It should be noted that the shear strength prediction formula is:

[0056] in, Indicates the predicted shear strength of the target model of diamond under different surface textures; Indicates the actual shear strength of the brazed joint without surface treatment; represents the second brazing surface area of ​​the first diamond sample after texturing; represents the first brazing surface area of ​​the first diamond sample; Indicates the maximum width of a single texture; represents the total length of the texture, Derived from actual measurement; y= represents the fitting function, y represents the depth of a single texture, Indicates the width of a single texture. represents the derivative of the fitting function. For example, Figure 3 It should be noted that the total texture length L is obtained by measuring the number and length of textures on the diamond surface. For example, if the diamond surface is a mesh structure, its total length is the product of the length of a texture and the number of textures.

[0057] It should also be added that diamond has diamond thickness. In the fitting function y=f(x), y max Indicates the maximum depth of a single texture, y max Limited by the thickness of the diamond. For example, h represents the thickness of the diamond, y max Less than or equal to 0.1h.

[0058] Furthermore, when the predicted shear strength σ1 meets the preset shear strength standard, actual surface treatment and brazing are performed on diamonds of different sizes of the target model based on the target shape texture; when the predicted shear strength σ1 does not meet the preset shear strength standard, the surface treatment process parameters are adjusted based on the predicted shear strength to obtain a new target shape texture, and the second brazing surface area S1 is recalculated based on the new target shape texture until the predicted shear strength σ1 meets the shear strength standard.

[0059] Specifically, when the predicted shear strength σ1 meets the expected strength, it indicates that the target shape surface texture setting adopted is reasonable, and the target shape texture can be used for the surface treatment and subsequent brazing of the actual diamond workpiece, so that the shear strength of the actual diamond workpiece meets the expected strength; when the predicted shear strength σ1 does not meet the expected requirements, it indicates that the target shape surface texture setting adopted is unreasonable, and it is necessary to adjust the preset surface treatment process parameters (such as texture width, depth, etc.) to obtain other specific shape surface textures, and recalculate the area of ​​the first diamond sample to be brazed after texture, that is, the second brazing surface area S1, until the predicted shear strength σ1 meets the expected strength. It means that the other specific shape surface textures obtained by adjusting the surface treatment process parameters can be used for the brazing of the actual diamond workpiece, so that the shear strength of the actual diamond workpiece meets the expected strength.

[0060] The shear strength prediction method of a diamond brazed joint provided in an embodiment of the present application is as follows: for a target model of diamond, at least two diamond samples of the same size of the target model are obtained, the first brazing surface area of ​​the first diamond sample is measured, the first diamond sample is subjected to surface treatment with a target shape texture using preset surface treatment process parameters, the textured first diamond sample is obtained and the second brazing surface area of ​​the textured first diamond sample is calculated, the second diamond sample is brazed based on a preset brazing process, and a shear strength test is performed on the brazed joint to obtain the actual shear strength of the brazed joint without surface treatment, and the actual shear strength of the brazed joint without surface treatment is obtained based on a preset shear strength prediction formula and the first brazing surface area and the second brazing surface area. 、 Actual shear strength, predicting the predicted shear strength of the target model diamond under different surface textures. The shear strength prediction method of the diamond brazed joint of the present application is prepared by preparing at least two diamond samples of the same size of the target model, surface treating the first diamond sample to obtain the brazing surface area before and after the texture of the first diamond sample, and calculating the actual shear strength of the brazed joint without surface treatment after brazing the second diamond sample. Based on this prediction of the predicted shear strength of the target model diamond under different surface textures, it is possible to directly determine whether the surface texture of the target diamond meets the expected requirements through a small diamond sample, which is convenient for guiding the construction of the diamond surface texture in actual production, reducing the waste of expensive diamonds, especially in the welding of large-sized diamonds, saving production costs and reducing energy expenditure.

[0061] Figure 6 Schematic diagram of the structure of the shear strength prediction device of the diamond brazed joint provided in the embodiment of the present application; Figure 6 As shown, the shear strength prediction device 600 of the diamond brazed joint according to the embodiment of the present application may specifically include: The first acquisition module 601 is used to acquire at least two diamond samples of the target model and the same size for the target diamond; wherein the diamond samples represent small diamonds.

[0062] The second acquisition module 602 is used to measure the first brazing surface area of ​​the first diamond sample, perform surface treatment of the first diamond sample with a target shape texture using preset surface treatment process parameters, obtain the textured first diamond sample, and calculate the second brazing surface area of ​​the textured first diamond sample.

[0063] The third acquisition module 603 is configured to braze the second diamond sample based on a preset brazing process, and perform a shear strength test on the brazed joint to obtain an actual shear strength of the brazed joint without surface treatment.

[0064] Prediction module 604 is used to predict the shear strength based on the preset shear strength prediction formula and the first brazing surface area and the second brazing surface area. 、 Actual shear strength, predicting the shear strength of the target model of diamond under different surface textures.

[0065] In one possible embodiment, the device for predicting the shear strength of a diamond brazed joint further includes: a processing module, configured to perform actual surface treatment and brazing on target diamonds of different sizes based on target shape and texture when the predicted shear strength meets a preset shear strength standard; An adjustment module is used to adjust the surface treatment process parameters based on the predicted shear strength to obtain a new target shape texture when the predicted shear strength does not meet the preset shear strength standard, and recalculate the second brazing surface area based on the new target shape texture until the predicted shear strength meets the shear strength standard.

[0066] In a possible implementation, the second acquisition module is specifically configured to: Obtaining a cross section of a first diamond sample obtained by surface treatment and shape data of the cross section, and fitting the shape data to obtain a corresponding fitting function; The brazing surface area of ​​the textured first diamond sample was calculated based on the fitting function.

[0067] In a possible embodiment, the surface treatment process parameters include at least the maximum width of a single texture and the depth of a single texture; the shear strength prediction formula is:

[0068] in, Indicates the predicted shear strength of the target model of diamond under different surface textures; Indicates the actual shear strength of the brazed joint without surface treatment; represents the second brazing surface area of ​​the first diamond sample after texturing; represents the first brazing surface area of ​​the first diamond sample; Indicates the maximum width of a single texture; represents the total length of the texture, Derived from actual measurement; y= represents the fitting function, y represents the depth of a single texture, Indicates the width of a single texture. represents the derivative of the fitted function.

[0069] In a possible implementation, the second acquisition module is further specifically configured to: Cutting the brazed joint after the surface treatment of the first diamond sample to obtain a textured cross section of the first diamond sample, and grinding and polishing the cross section to obtain a metallographic sample; Use a preset scanning electron microscope to observe the metallographic sample, select a complete texture morphology and take a photo to obtain the required texture photo; The actual data of each point on the cross section is calculated based on the texture photograph, and the actual data is nonlinearly fitted to convergence under the preset determination coefficient to obtain the corresponding fitting function.

[0070] In a possible embodiment, the diamond is in the form of a thin sheet, and the infrared transmittance of the diamond is greater than a preset infrared transmittance threshold; Diamond has diamond thickness. In the fitting function y=f(x), y max Indicates the maximum depth of a single texture, y max Limited by diamond thickness.

[0071] In a possible implementation, the third acquisition module is specifically configured to: Grinding the surface of the preset metal substrate to remove the surface oxide film; Assembling a metal substrate, a target active brazing material, and a second diamond sample to obtain a diamond brazing assembly; wherein the target active brazing material is an active brazing material determined by Ag, Cu, and Ti; The diamond brazing components are brazed using a vacuum furnace according to a preset brazing process.

[0072] The shear strength prediction device for a diamond brazed joint provided in an embodiment of the present application obtains at least two diamond samples of the same size of the target model for a target diamond, measures the first brazing surface area of ​​the first diamond sample, performs surface treatment of the target shape texture on the first diamond sample using preset surface treatment process parameters, obtains the textured first diamond sample and calculates the second brazing surface area of ​​the textured first diamond sample, brazes the second diamond sample based on a preset brazing process, and performs a shear strength test on the brazed joint to obtain the actual shear strength of the brazed joint without surface treatment, and calculates the actual shear strength of the brazed joint based on a preset shear strength prediction formula and the first brazing surface area and the second brazing surface area. 、Actual shear strength, predicting the predicted shear strength of the target model diamond under different surface textures. The shear strength prediction device of the diamond brazed joint of the present application prepares at least two diamond samples of the same size of the target model, performs surface treatment on the prepared first diamond sample to obtain the brazing surface area before and after the texture of the first diamond sample, and calculates the actual shear strength of the brazed joint without surface treatment after brazing the second diamond sample. Based on this prediction, the predicted shear strength of the target model diamond under different surface textures can be directly determined by a small diamond sample to determine whether the surface texture of the target diamond meets the expected requirements, which is convenient for guiding the construction of the diamond surface texture in actual production, reducing the waste of expensive diamonds, especially in the welding of large-sized diamonds, saving production costs and reducing energy expenditure.

[0073] like Figure 7 As shown, an electronic device 700 provided in an embodiment of the present application includes: a processor 701, a memory 702 and a bus, wherein the memory 702 stores machine-readable instructions executable by the processor 701. When the electronic device is running, the processor 701 communicates with the memory 702 through the bus, and the processor 701 executes the machine-readable instructions to perform the steps of the shear strength prediction method of the diamond brazed joint as described above.

[0074] Specifically, the memory 702 and processor 701 can be general-purpose memories and processors, which are not specifically limited here. When the processor 701 runs the computer program stored in the memory 702, the shear strength prediction method of the diamond brazed joint can be executed.

[0075] Corresponding to the above-mentioned method for predicting the shear strength of diamond brazed joints, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the steps of the above-mentioned method for predicting the shear strength of diamond brazed joints are executed.

[0076] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, 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 communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0077] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0078] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0079] If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of this application, or the portion that contributes to the prior art, or the portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the deployment method described in each embodiment of this application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, ROM, RAM, a magnetic disk, or an optical disk.

[0080] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for predicting the shear strength of a diamond brazed joint, characterized in that: The method comprises: For a target diamond model, obtaining at least two diamond samples of the same size as the target model; wherein the diamond samples represent small diamonds; Measuring a first brazing surface area of ​​a first diamond sample, performing a surface treatment on the first diamond sample to obtain a target shape texture using preset surface treatment process parameters, obtaining the textured first diamond sample, and calculating a second brazing surface area of ​​the textured first diamond sample; Brazing the second diamond sample based on the preset brazing process, and performing a shear strength test on the brazed joint to obtain the actual shear strength of the brazed joint without surface treatment; Based on the preset shear strength prediction formula and the first brazing surface area and the second brazing surface area 、 The actual shear strength is used to predict the shear strength of the target model of diamond under different surface textures.

2. The method according to claim 1, characterized in that The method further comprises: When the predicted shear strength meets the preset shear strength standard, actual surface treatment and brazing are performed on diamonds of different sizes of the target model based on the target shape and texture; When the predicted shear strength does not meet the preset shear strength standard, the surface treatment process parameters are adjusted based on the predicted shear strength to obtain a new target shape texture, and the second brazing surface area is recalculated based on the new target shape texture until the predicted shear strength meets the shear strength standard.

3. The method according to claim 2, characterized in that The calculating the second brazing surface area of ​​the textured first diamond sample comprises: Obtaining a cross section of the first diamond sample obtained by surface treatment and shape data of the cross section, and fitting the shape data to obtain a corresponding fitting function; The brazing surface area of ​​the textured first diamond sample is calculated based on the fitting function.

4. The method according to claim 3, characterized in that The surface treatment process parameters include at least the maximum width of a single texture and the depth of a single texture; the shear strength prediction formula is: in, Indicates the predicted shear strength of the target model of diamond under different surface textures; Indicates the actual shear strength of the brazed joint without surface treatment; represents the second brazing surface area of ​​the first diamond sample after texturing; represents the first brazing surface area of ​​the first diamond sample; Indicates the maximum width of a single texture; represents the total length of the texture, Derived from actual measurement; y= represents the fitting function, y represents the depth of a single texture, Indicates the width of a single texture. represents the derivative function of the fitting function.

5. The method according to claim 4, characterized in that The step of obtaining a cross section of the first diamond sample obtained by surface treatment and shape data of the cross section, and fitting the shape data to obtain a corresponding fitting function includes: Cutting the brazed joint after the surface treatment of the first diamond sample to obtain a textured cross-section of the first diamond sample, and grinding and polishing the cross-section to obtain a metallographic sample; Observe the metallographic sample using a preset scanning electron microscope, select a complete texture morphology and take a photo to obtain the required texture photo; The actual data of each point on the cross section is calculated based on the texture photograph, and the actual data is subjected to nonlinear fitting until convergence under a preset determination coefficient to obtain a corresponding fitting function.

6. The method according to claim 5, characterized in that The diamond is in a thin flake shape, and the infrared transmittance of the diamond is greater than a preset infrared transmittance threshold; The diamond has a diamond thickness, and in the fitting function y=f(x), y max Indicates the maximum depth of a single texture, y max Limited by the diamond thickness.

7. The method according to claim 6, characterized in that The brazing of the second diamond sample based on a preset brazing process includes: Grinding the surface of the preset metal substrate to remove the surface oxide film; Assembling the metal substrate, the target active brazing material and the second diamond sample to obtain a diamond brazing assembly; wherein the target active brazing material is an active brazing material determined by Ag, Cu and Ti; The diamond brazing assembly is brazed using a vacuum furnace according to a preset brazing process.

8. A device for predicting the shear strength of a diamond brazed joint, characterized in that: The device comprises: A first acquisition module is configured to acquire at least two diamond samples of the same size as the target diamond model; wherein the diamond samples represent small diamonds; a second acquisition module, configured to measure the area of ​​a first brazing surface of a first diamond sample, perform surface treatment on the first diamond sample to obtain a target shape texture using preset surface treatment process parameters, obtain the textured first diamond sample, and calculate the area of ​​a second brazing surface of the textured first diamond sample; a third acquisition module, configured to braze the second diamond sample based on a preset brazing process, and perform a shear strength test on the brazed joint to obtain an actual shear strength of the brazed joint without surface treatment; A prediction module is used to predict the shear strength based on a preset shear strength prediction formula and the first brazing surface area and the second brazing surface area. 、 The actual shear strength is used to predict the shear strength of the target model of diamond under different surface textures.

9. An electronic device, characterized in that: include: A processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the shear strength prediction method for a diamond brazed joint according to any one of claims 1 to 7 are performed.

10. A computer-readable storage medium, characterized in that The computer readable storage medium stores a computer program, which, when executed by a processor, executes the steps of the method for predicting the shear strength of a diamond brazed joint according to any one of claims 1 to 7.

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