Device for preparing hard alloy coating fracture

Abstract

The utility model discloses a device for preparing a hard alloy coating fracture. The device comprises a hammering tool and a base, the upper end face of the base is provided with at least one concave part for fixing a sample, the cross section of the concave part is in a shape with a wide upper part and a narrow lower part, and the concave part is provided with an opening in at least one side face of the base. The utility model aims to provide the fracture device which is firm in fracture sample and simple and safe in operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of material detection, in particular to a device for preparing a fracture of a hard alloy coating. Background Art

[0002] Today, increasing demands for product quality and performance are driving researchers to delve deeper into materials research, including the internal structure and morphology of materials, and the causes and evolution of various defects. Fracture observation is a key method in modern materials microanalysis and testing. Its purpose is to observe the microstructure of a material's fracture surface using a scanning electron microscope, analyze the morphology, and determine the material's properties based on the results of this observation and analysis.

[0003] The coating acts as a chemical and thermal barrier, reducing diffusion and chemical reactions between the tool and the workpiece, thereby reducing grove wear. Coated carbide tools offer high surface hardness, excellent wear resistance, stable chemical properties, heat and oxidation resistance, low friction coefficient, and low thermal conductivity. In materials science, fracture testing of carbide coatings is crucial for analyzing coating performance.

[0004] Currently, in the process of testing cemented carbide coatings, traditional fracture devices have problems such as loose sample fixation, easy dirtiness, cumbersome operation process, unsafe and high cost, which affect the accuracy and reliability of the test results. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a fracture device with a firm fracture sample and a simple and safe operation process.

[0006] The present application provides a device for preparing a fracture surface of a cemented carbide coating, comprising:

[0007] A hammering tool and a base; the upper end surface of the base is provided with at least one recess for securing the sample, the cross-section of the recess being wide at the top and narrow at the bottom, and the recess being open at at least one side of the base. Preferably, there are multiple recesses, such as three, four, or five.

[0008] Specifically, the recessed portion is a groove.

[0009] Furthermore, a plurality of grooves are provided in parallel on the upper end surface of the base.

[0010] Furthermore, the grooves on two opposite sides between the plurality of grooves are raised to form convex portions, and the upper end surfaces of the convex portions have a certain width.

[0011] Specifically, the groove is opened at two opposite sides of the base, so that when the sample is fixed in the groove, it can be extended from any one of the two side openings, thereby improving utilization.

[0012] Furthermore, the bottom of the recess has an air-avoiding structure, which can prevent the cutting edge of the blade sample from contacting the base and causing dirt.

[0013] Specifically, the air-avoiding structure is an air-avoiding hole, and the cross section of the air-avoiding hole is narrow at the top and wide at the bottom.

[0014] Specifically, the cross-section of the recessed portion is an inverted triangle or an inverted trapezoid, and the air-avoidance structure is provided at the diagonal corners of the bottom of the inverted triangle or inverted trapezoid. Specifically, the air-avoidance structure is provided below one diagonal corner of the inverted triangle or two diagonal corners of the bottom of the inverted trapezoid. Preferably, the angle formed by the two side walls of the inverted triangle or inverted trapezoid is 15°-160°, more preferably 35°-135°.

[0015] Specifically, the diameter of the air-avoiding hole is 1-5 mm.

[0016] Furthermore, the lower end surface of the base is provided with an anti-slip structure.

[0017] Specifically, the anti-skid structure is a rough surface, or the anti-skid structure is a smooth surface and an anti-skid pad matched therewith.

[0018] Specifically, a passivation surface is provided at the intersection of each contact surface of the hammer tool.

[0019] The improvements of this application bring the following advantages: the fracture device fixes the sample firmly, is not easy to get dirty, and the operation process is simple and safe; the cemented carbide coating structure can be observed under a scanning electron microscope, and the thickness of a single layer of coating can be accurately measured; the sample preparation method is simple, energy-saving and environmentally friendly, and the time for sample preparation is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the base in the embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the hammering tool in the embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the side structure of the base in the embodiment of the present application;

[0023] In the figure, 1 is a base; 11 is a recess; 111 is an air-avoiding structure; 12 is an upper end surface of the base; 13 is a side surface of the base; 14 is a protrusion; 141 is an upper end surface of the protrusion; 15 is a lower end surface of the base; 2 is a hammering tool; 21 is a passivated surface; 3 is an anti-slip pad. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0025] See also Figure 1-3 , Example 1 of the present application is a device for preparing a fracture of a cemented carbide coating, comprising a base 1 and a hammering tool 2.

[0026] The base 1 is roughly in the shape of a block with a certain thickness, and its upper end surface 12 is provided with at least one recess 11 for fixing the sample. The cross-section of the recess 11 is roughly wide at the top and narrow at the bottom, that is, the opening at the upper end is larger and wider than the bottom surface at the lower end, so as to better accommodate and fix the sample; and the recess 11 is open at at least one side surface 13 of the base 1, so that the sample can extend relative to the side surface 13 so that the hammer tool 2 can strike it to form a fracture.

[0027] The hammering tool 2 is generally in the shape of a strip, a stick or other shapes that can be used to hammer the sample and has a certain thickness, and is used to apply a pushing force to the sample fixed in the recess 11 to form a fracture on the sample surface.

[0028] like Figure 1 As shown, a plurality of groove-shaped recesses 11 can be provided in parallel on the upper end surface 12 of the base 1. These grooves can have various cross-sectional shapes and various angles to accommodate more different samples and improve the scope of use and utilization rate.

[0029] like Figure 3 As shown, the grooves on opposite sides between the multiple grooves are raised to form a convex portion 14, and the upper end surface 141 of the convex portion 14 has a certain width, which can improve the structural strength of the grooves on both sides, so that it can better clamp and fix the sample.

[0030] like Figure 3 As shown, the air-avoiding structure 111 can be an air-avoiding hole, and the cross-section of the air-avoiding hole is narrow at the top and wide at the bottom. The narrow at the top and wide at the bottom shape here refers to the connection between the air-avoiding hole and the recess 11 being narrow, while the lower part of the air-avoiding hole is relatively wide, so that when the blade sample is clamped and fixed at the connection between the air-avoiding hole and the recess 11, the side wall of the lower part of the air-avoiding hole where the blade is located does not contact the blade, thereby preventing the cutting edge of the blade sample from contacting the base 1 and causing dirt.

[0031] like Figure 2 As shown, the hammering tool 2 can be in the shape of a long strip or stick with a certain thickness, for example Figure 2The intersection of the side surfaces of the long rectangular strip shown is passivated, for example, chamfered to form a passivated surface 21, which is beneficial to the preparation of the sample fracture without crushing the sample.

[0032] A device for preparing a fracture surface of a cemented carbide coating and a method for using the same are as follows:

[0033] Example 2

[0034] 1) This embodiment uses a PVD-coated carbide blade as a sample. A device for preparing a carbide coating fracture includes a base 1 and a hammering tool 2; the base 1 is provided with an isosceles triangle-shaped groove 11 with a depth of 12 mm and an angle of 35°, and a 2 mm diameter avoidance hole 111 is opened at the 35° sharp angle of the groove 11 to prevent the blade edge from contacting the base 1 and causing dirt; an anti-slip pad 3 can be provided at the lower end of the base 1 to increase the friction between the base 1 and the tabletop; the hammering tool 2 is used to apply a pushing force to the carbide sample fixed in the recess 11 of the base 1 to form a fracture on the surface of the carbide sample. The base 1 and the hammering tool 2 are made of the same carbide material.

[0035] 2) First, use tweezers to hold the PVD-coated carbide insert and place it in the corresponding groove 11 of the base 1, with one end thereof extending relative to the side 13 of the base 1;

[0036] 3) Use tweezers to fix the PVD coated carbide insert in the groove 11;

[0037] 4) Use hammer tool 2 to hit the relatively protruding part of the fixed sample;

[0038] 5) Place the sample with the fractured surface in a glass container filled with anhydrous ethanol, with the height of the anhydrous ethanol liquid slightly higher than the height of the sample;

[0039] 6) Place the glassware in an ultrasonic cleaner and clean it at 60 Hz for 20 minutes;

[0040] 7) Use clean tweezers to blow dry the anhydrous ethanol on the surface of the ultrasonically cleaned sample with a hair dryer;

[0041] 8) The sample to be tested was glued to the T-shaped sample holder with conductive double-sided tape and placed in an ion sputtering vacuum apparatus. -5 Take out after spraying gold for 25 seconds;

[0042] 9) The sample was then placed in the electron microscope sample chamber. After reaching the vacuum requirement, the fracture site was selected for observation under 10KV current excitation. The columnar crystal structure of the PVD coating and the fracture morphology of the multi-layer coating were observed.

[0043] Example 3

[0044] This embodiment uses a CVD-coated carbide insert as a sample. A device for preparing fracture surfaces on a carbide coating includes a base 1 and a hammering tool 2. The base 1 is provided with an isosceles trapezoidal groove 11 with a depth of 5 mm and an angle of 135°. The bottom of the groove 11 is provided with a clearance structure 111. The lower end of the base 1 can be provided with an anti-slip pad 3. The hammering tool 2 is used to apply a pushing force to the carbide sample fixed in the groove 11 of the base 1 to form a fracture surface on the carbide sample. The base 1 and hammering tool 2 are made of the same carbide material.

[0045] 2) First, use tweezers to hold the CVD-coated carbide insert and place it on the corresponding position of the base 1, with one end thereof extending relative to the side surface 13 of the base 1;

[0046] 3) Use tweezers to fix the CVD coated carbide insert on the base 1;

[0047] 4) Use hammer tool 2 to hit the relatively protruding part of the fixed sample;

[0048] 5) Place the sample with the fractured surface in a glass container filled with anhydrous ethanol, with the height of the anhydrous ethanol liquid slightly higher than the height of the sample;

[0049] 6) Place the glassware in an ultrasonic cleaner and clean it at 60 Hz for 20 minutes;

[0050] 7) Use clean tweezers to blow dry the anhydrous ethanol on the surface of the ultrasonically cleaned sample with a hair dryer;

[0051] 8) The sample to be tested was glued to the T-shaped sample holder with conductive double-sided tape and placed in an ion sputtering vacuum apparatus. -5 Remove after Pa spraying gold for 45S;

[0052] 9) The sample was then placed in the electron microscope sample chamber. After reaching the vacuum requirement, the fracture site was selected for observation under 10KV current excitation. The columnar crystal structure of the CVD coating and the fracture morphology of the multilayer coating were observed.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention 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 the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A device for preparing a fracture of a cemented carbide coating, characterized in that: include: A hammering tool and a base; the upper end surface of the base is provided with at least one recess for fixing the sample, the cross section of the recess is wide at the top and narrow at the bottom, and the recess is open at at least one side of the base.

2. The device according to claim 1, characterized in that The concave portion is a groove.

3. The device according to claim 2, characterized in that The upper end surface of the base is provided with a plurality of grooves in parallel.

4. The device according to claim 3, characterized in that The grooves on two opposite sides between the plurality of grooves are raised to form convex portions, and the upper end surfaces of the convex portions have a certain width.

5. The device according to claim 2, characterized in that The groove opens at two opposite sides of the base.

6. The device according to any one of claims 1 to 5, characterized in that The bottom of the recess has a space-avoiding structure.

7. The device according to claim 6, characterized in that The air-avoiding structure is an air-avoiding hole, and the cross section of the air-avoiding hole is narrow at the top and wide at the bottom.

8. The device according to claim 6, characterized in that The cross section of the recessed portion is in the shape of an inverted triangle or an inverted trapezoid, and the air-avoiding structure is arranged at the diagonal position of the bottom of the inverted triangle or the inverted trapezoid.

9. The device according to any one of claims 1 to 5, characterized in that The lower end surface of the base is provided with an anti-skid structure, which is a rough surface, or a smooth surface and an anti-skid pad matched therewith.

10. The device according to any one of claims 1 to 5, characterized in that The intersections of the contact surfaces of the hammer tool are provided with passivation surfaces.

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