Ultra-thin cutting blade and preparation method thereof

Abstract

The present application relates to the field of cutting blade technology, and specifically discloses an ultra-thin cutting blade and a preparation method thereof. The ultra-thin cutting blade provided in the present application comprises the following components in parts by weight: 50-85 parts of metal binder, 20-40 parts of diamond and 10-20 parts of ceramic binder; the outer diameter of the ultra-thin cutting blade is 55-60mm and the thickness is 0.1-0.5mm; the present application also provides a preparation method for the above-mentioned ultra-thin cutting blade, comprising the following steps: preparing a ceramic binder; the step of preparing a ceramic binder comprises: electrospinning; wherein the injection speed of the electrospinning is 0.5-2mL and the equipment speed is 300-500r / min. The ultra-thin cutting blade provided in the present application has good hardness, high bending strength and long service life.

Description

Technical Field

[0001] The present application relates to the technical field of cutting blades, and in particular to an ultra-thin cutting blade and a preparation method thereof. Background Art

[0002] In recent years, ultra-thin diamond cutting blades have been widely used in the precision and fine processing of hard and brittle materials such as semiconductor materials, silicon wafers, glass, ceramics, and electronic packaging materials. However, with the continuous increase in chip density and the continuous decrease in thickness, the width of the cutting path reserved for wafer cutting is getting smaller and smaller, so thinner cutting blades are needed to meet the above requirements.

[0003] At present, the main components of ultra-thin cutting blades used in microelectronic packaging are diamond and metal binder, but the obtained ultra-thin cutting blades lack impact resistance and hardness, so the cutting performance is poor, which easily causes problems such as warping and curling of the cutting blades, which in turn makes it more difficult to cut round wafers. Therefore, there is an urgent need to provide a cutting blade with good cutting strength and long service life, which is suitable for the processing of electronic components, optical parts, various semiconductor packaging components, ceramics, single crystals and other materials. Summary of the invention

[0004] In order to improve the performance of an ultra-thin cutting blade and enhance the cutting strength of the ultra-thin cutting blade, the present application provides an ultra-thin cutting blade and a preparation method thereof.

[0005] In a first aspect, the present application provides an ultra-thin cutting blade, which adopts the following technical solution:

[0006] An ultra-thin cutting blade comprises the following components in parts by weight: 50-85 parts of a metal binder, 35-50 parts of diamonds and 10-20 parts of a ceramic binder.

[0007] The ultra-thin cutting blade provided by the present application has a reasonable combination of the components, and the obtained ultra-thin cutting blade has both certain toughness and certain rigidity, so it has good hardness, cutting strength and impact resistance, and the service life can reach more than 3600m. The metal binder has certain formability and compressibility, and has a good bonding ability to diamond. Although the metal binder can withstand greater grinding pressure, it is prone to toughness deformation; while the ceramic binder has small elastic deformation and strong hardness. Therefore, the present application uses diamond with metal binder and ceramic binder, which can make full use of the respective advantages of metal binder and ceramic binder to obtain an ultra-thin cutting blade with excellent cutting performance and impact resistance.

[0008] Preferably, the ultra-thin cutting blade comprises the following components in parts by weight: 60-80 parts of metal binder, 20-40 parts of diamond and 10-20 parts of ceramic binder.

[0009] In some embodiments, the weight parts of the metal binder may be 50-60 parts, 50-70 parts, 50-80 parts, 60-70 parts, 60-80 parts, 60-85 parts, 70-80 parts, 70-85 parts or 80-85 parts.

[0010] In a specific embodiment, the weight proportion of the metal binder may also be 50 parts, 60 parts, 70 parts, 80 parts or 85 parts.

[0011] In a specific embodiment, the weight portion of the diamond may be 30 parts.

[0012] In some embodiments, the weight portion of the vitrified binder may be 10-15 parts or 15-20 parts.

[0013] In a specific embodiment, the weight portion of the ceramic binder may also be 10 parts, 15 parts or 20 parts.

[0014] Preferably, the weight ratio of the metal binder to the ceramic binder is (4.5-6):1.

[0015] In some embodiments, the weight ratio of the metal binder to the ceramic binder can be (4.7-5.3):1, (4.7-5.7):1, (5.3-5.7):1, (5.3-6):1 or (5.7-6):1.

[0016] In a specific embodiment, the weight ratio of the metal binder to the ceramic binder may also be 4.7:1, 5.3:1, 5.7:1 or 6:1.

[0017] In the present application, when the amount of metal binder added is too high, the ultra-thin cutting blade obtained has low hardness, poor rigidity, and short service life; when the amount of ceramic binder added is too high, the ultra-thin cutting blade obtained has low toughness, high brittleness, and is prone to breakage, so its service life is short. Therefore, the present application further controls the weight ratio of metal binder to ceramic binder within the above range, so that the ultra-thin cutting blade can have excellent toughness and rigidity at the same time, so that warping, curling, fragmentation and other problems will not occur during subsequent use.

[0018] Preferably, the metal binder comprises the following components in parts by weight: 10-20 parts of Fe powder, 20-30 parts of CuSn10 pre-alloyed powder, 10-20 parts of Co powder, 5-15 parts of Ni powder, 15-30 parts of Cu powder and 10-20 parts of FeNi30 pre-alloyed powder.

[0019] The present application adopts the above-mentioned raw materials and controls the addition amount of each metal within the above-mentioned range, thereby obtaining a metal binder with good toughness and good bonding effect with diamond; the use of the metal binder in combination with the ceramic binder provided by the present application can give full play to the respective advantages of the two binders, thereby obtaining an ultra-thin cutting blade with good bending strength, high hardness, excellent toughness and long service life.

[0020] Preferably, the ceramic binder has a fiber network inside; the fiber diameter is 2-5 μm and the length is 20-40 μm.

[0021] The ceramic binder prepared in the present application has a fiber mesh structure inside, and the diameter and length of the fiber are within the above range. The ceramic binder within the above fiber diameter and length range can provide good rigid support for the ultra-thin cutting blade, so that the ultra-thin cutting blade maintains good mechanical properties during use, and will not cause curling, curling, deformation and other problems.

[0022] Preferably, the outer diameter of the ultra-thin cutting blade is 55-60 mm and the thickness is 0.1-0.5 mm.

[0023] In a specific embodiment, the ultra-thin cutting blade has an outer diameter of 58 mm and a thickness of 0.2 mm.

[0024] In a second aspect, the present application provides a method for preparing an ultra-thin cutting sheet, using the following technical solution:

[0025] A method for preparing an ultrathin cutting blade comprises the following steps: preparing a ceramic binder and calcining; the step of preparing the ceramic binder comprises: electrostatic spinning; wherein the injection speed of the electrostatic spinning is 0.5-2 mL, and the equipment rotation speed is 300-500 r / min.

[0026] In the present application, by adopting an electrospinning process and controlling the injection speed and the equipment speed in the electrospinning process within the above-mentioned range, a ceramic binder with an internal fiber diameter within the range of 2-5 μm and a length within the range of 20-40 μm can be obtained. The ceramic binder has a fiber mesh structure inside, and through the cross-overlapping of the fibers, it can provide good mechanical support for the ultra-thin cutting blade, ensuring that it does not curl, curl, or deform during use.

[0027] In a specific embodiment, the injection speed may also be 0.5 mL or 2 mL.

[0028] In a specific embodiment, the rotation speed of the equipment can also be 300r / min or 500r / min.

[0029] Preferably, the calcination temperature is 500-600° C. and the calcination time is 5-7 h.

[0030] Preferably, the step of preparing the vitrified binder further comprises ball milling.

[0031] Preferably, the method for preparing the ultra-thin cutting blade further comprises sintering; the specific steps of the sintering are: placing the green body obtained by pressing into a graphite mold, and sintering at a temperature of 650-950° C. for 1-2 hours.

[0032] In the preparation process of ultra-thin cutting blades, if the sintering temperature is too low and the sintering time is too short, the ultra-thin cutting blades formed will have poor internal bonding effect, unsatisfactory cutting effect, and low hardness; if the sintering temperature is too high and the sintering time is too long, the cutting performance of the ultra-thin cutting blades will deteriorate and cracks will easily appear. Therefore, the present application controls the sintering temperature and sintering time within the above range, so that the components of the ultra-thin cutting blades can be fully bonded and formed, and an ultra-thin cutting blade with good bending strength, high hardness, and good toughness can be obtained.

[0033] In some embodiments, the sintering temperature may be 650-700°C or 700-950°C.

[0034] In a specific embodiment, the sintering temperature may also be 650°C, 700°C or 950°C.

[0035] In some embodiments, the sintering time may be 1-1.5 h or 1.5-2 h.

[0036] In a specific embodiment, the sintering time may also be 1 h, 1.5 h or 2 h.

[0037] In summary, this application has the following beneficial effects:

[0038] 1. The present application provides an ultra-thin cutting blade made of metal binder, diamond and ceramic binder. The ultra-thin cutting blade has both certain toughness and certain rigidity, so it has good cutting strength and impact resistance, and its service life can reach more than 3600m.

[0039] 2. The present application further controls the weight ratio of the metal binder to the ceramic binder within the range of (4.5-6):1, so that the bending strength of the obtained ultra-thin cutting blade is greater than 1200Mpa, the hardness is greater than 75HRB, and the service life is greater than 3900m.

[0040] 3. In the preparation method of the ultra-thin cutting blade provided in the present application, the injection speed of the electrospinning is controlled within the range of 0.5-2mL, and the equipment speed is controlled within the range of 300-500r / min, so that a ceramic binder with an internal fiber diameter of 2-5μm and a length of 20-40μm can be obtained. The ceramic binder of this size has excellent mechanical properties and can provide mechanical support for the ultra-thin cutting blade to ensure that it does not curl, curl, or deform during use.

[0041] 4. In the present application, the sintering temperature in the preparation method of the ultra-thin cutting blade is controlled between 650-950°C and the sintering time is controlled between 1-2h, so that the components of the ultra-thin cutting blade can be fully bonded and formed, thereby obtaining an ultra-thin cutting blade with excellent bending strength and hardness. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the ultra-thin cutting sheet provided in this application.

[0043] Figure 2 This is a SEM image of the ceramic binder whiskers in Preparation Example 1 of the present application. DETAILED DESCRIPTION

[0044] The present application provides an ultra-thin cutting blade, which includes the following components in parts by weight: 50-85 parts of a metal binder, 20-40 parts of diamonds, and 10-20 parts of a ceramic binder; further, the ultra-thin cutting blade may also include the following components in parts by weight: 60-80 parts of a metal binder, 20-40 parts of diamonds, and 10-20 parts of a ceramic binder; further, the weight ratio of the metal binder to the ceramic binder is (4.5-6):1.

[0045] Among them, the diameter of the ceramic binder is 2-5μm and the length is 20-40μm; the outer diameter of the ultra-thin cutting blade is 55-60mm and the thickness is 0.1-0.5mm.

[0046] The method for preparing the ultra-thin cutting sheet comprises the following steps:

[0047] (1) Preparing a metal binder: Weighing and mixing the components of the metal binder uniformly, and putting the components into a three-dimensional mixer for mixing for 1 hour to obtain the metal binder; the metal binder comprises the following components in parts by weight: 10-20 parts of Fe powder, 20-30 parts of CuSn10 pre-alloyed powder, 10-20 parts of Co powder, 5-15 parts of Ni powder, 15-30 parts of Cu powder and 10-20 parts of FeNi30 pre-alloyed powder.

[0048] (2) Preparation of ceramic binder:

[0049] (2-1) preparing solution A: weighing tetraethyl orthosilicate and adding it to anhydrous ethanol, stirring and mixing evenly, then adding nitric acid solution, acetylacetone and polyvinyl alcohol to the above solution, stirring until it becomes clear to obtain solution A;

[0050] (2-2) preparing solution B: dissolving aluminum nitrate nonahydrate, boric acid, and sodium nitrate in a mixed solution of deionized water and anhydrous ethanol, and stirring to obtain solution B;

[0051] (2-3) Preparation of sol-gel C: Solution B was added dropwise to solution A under stirring and mixed evenly; then polyacrylonitrile solution was added to the mixed solution and stirring was continued for 3 h to obtain sol-gel C;

[0052] (2-4) Electrospinning: The sol-gel C is loaded into a drum, and ceramic binder whiskers are prepared under the conditions of an injection speed of 0.5-2 mL / h, an electric field power supply of 20-40 kV, and a drum speed of 300-500 r / min;

[0053] (2-5) ball milling: drying the ceramic binder whiskers, then ball milling for 3-4 hours, and sieving to obtain ceramic binder powder;

[0054] (2-6) Calcination: Calcine the ceramic binder powder at 500-600° C. for 5-6 h to obtain the ceramic binder.

[0055] (3) Mixing: The metal binder obtained in step (1), the ceramic binder obtained in step (2), diamond and liquid paraffin are placed in a three-dimensional mixer and mixed for 1-2 hours to obtain a premix.

[0056] (4) Pressing: Pressing the premix obtained in step (3) to obtain a green compact, so that the thickness of the green compact is 1.1-1.3 times the final thickness; wherein the pressing is performed by using a hydraulic press in the direction of the cutter head height, and the molding pressure is 100-500 kgf / cm 2 .

[0057] (5) Sintering: The compact obtained in step (4) is sintered by a vacuum hot pressing sintering machine to obtain a cutting sheet preform; wherein the sintering temperature is 650-950° C., the pressure is 150-200 MPa, and the time is 1-2 h.

[0058] (6) Grinding: The above-mentioned cutting blade preform is sequentially trimmed on an external cylindrical grinder, a single-end surface thinning device, and an electric spark wire cutting device to obtain an ultra-thin cutting blade; the ultra-thin cutting blade has an outer diameter of 55-60 mm, an inner diameter of 36-42 mm, and a thickness of 0.1-0.5 mm.

[0059] In the embodiments of the present application, the particle size of diamond is 10-50 μm, model is W10, purchased from Henan Liliang Diamond Co., Ltd.; the particle size of each component in the metal binder is 3-30 μm, and the metal binder is homemade; the degree of polymerization of polyvinyl alcohol is 25,000-35,000; the remaining raw materials, reagents, solvents, etc. can be obtained commercially.

[0060] The present application is further described in detail below in combination with preparation examples, embodiments, illustrations of the drawings and performance testing experiments.

[0061] Preparation Example

[0062] Preparation Example 1

[0063] Preparation Example 1 provides a ceramic binder.

[0064] The preparation method of the above-mentioned ceramic binder is as follows:

[0065] (1) Preparation of solution A: 12 g of tetraethyl orthosilicate (TEOS) was weighed and added to 20 mL of anhydrous ethanol solution, and the mixture was stirred for 3 h to be uniformly mixed. Then, a nitric acid solution was added to adjust the pH of the solution to 4. Then, 3 mL of acetylacetone and 3 mL of self-made polyvinyl alcohol were added to the solution, and the mixture was stirred until the solution was clear, thereby obtaining solution A.

[0066] (2) Preparation of solution B: Dissolve 26 g of aluminum nitrate nonahydrate, 50 g of boric acid, and 12 g of sodium nitrate in 400 mL of a mixed solution (deionized water and anhydrous ethanol in a volume ratio of 1:1), and stir the mixed solution at 300 r / min for 1 h using a magnetic stirrer to obtain solution B;

[0067] (3) Preparation of sol-gel C: Solution B was slowly added dropwise to solution A at a stirring speed of 300 r / min and mixed evenly; then 10 mL of 10% polyacrylonitrile solution was added to the mixed solution, and the mixed solution was stirred at 70° C. and 300 r / min for 3 h to obtain sol-gel C;

[0068] (4) Electrospinning: The sol-gel C was loaded into a drum, and ceramic binder whiskers were prepared under the conditions of an injection speed of 0.5 mL / h, an electric field power supply of 30 kV, and a drum speed of 300 r / min;

[0069] (5) ball milling: drying the ceramic binder whiskers, and then ball milling them at 300 r / min for 4 h using an omnidirectional planetary ball mill, and sieving them using a 100-mesh sieve to obtain ceramic binder powder;

[0070] (6) Calcination: The ceramic binder powder is placed in a muffle furnace and calcined at 550° C. for 6 h to obtain a ceramic binder.

[0071] The ceramic binder whiskers obtained by electrospinning in step (4) were subjected to SEM scanning electron microscopy, and the results were as follows: Figure 2 As shown; the diameter of the ceramic bond whisker is 2-5μm and the length is 20-30μm.

[0072] Preparation Example 2

[0073] Preparation Example 2 provides a ceramic binder.

[0074] The preparation method of the above-mentioned ceramic binder is as follows:

[0075] (1) Preparation of solution A: 14.4 g of tetraethyl orthosilicate (TEOS) was weighed and added to 25 mL of anhydrous ethanol solution, and the mixture was stirred for 3 h to be uniformly mixed. Then, a nitric acid solution was added to adjust the pH of the solution to 4. Then, 3 mL of acetylacetone and 3 mL of self-made polyvinyl alcohol were added to the solution, and the mixture was stirred until the solution was clear, thereby obtaining solution A.

[0076] (2) Preparation of solution B: 34.6 g of aluminum nitrate nonahydrate, 25 g of boric acid, and 8 g of sodium nitrate were dissolved in 500 mL of a mixed solution (deionized water and anhydrous ethanol in a volume ratio of 1:1), and the mixed solution was stirred at 300 r / min for 1 h using a magnetic stirrer to obtain solution B;

[0077] (3) Preparation of sol-gel C: Solution B was slowly added dropwise to solution A at a stirring speed of 300 r / min and mixed evenly; then 10 mL of 10% polyacrylonitrile solution was added to the mixed solution, and the mixed solution was stirred at 70° C. and 300 r / min for 3 h to obtain sol-gel C;

[0078] (4) Electrospinning: The sol-gel C was loaded into a drum, and ceramic binder whiskers were prepared under the conditions of an injection speed of 2 mL / h, an electric field power supply of 30 kV, and a drum speed of 500 r / min;

[0079] (5) ball milling: drying the ceramic binder whiskers, and then ball milling them at 300 r / min for 4 h using an omnidirectional planetary ball mill, and sieving them using a 100-mesh sieve to obtain ceramic binder powder;

[0080] (6) Calcination: The ceramic binder powder is placed in a muffle furnace and calcined at 550° C. for 6 h to obtain a ceramic binder.

[0081] The ceramic binder whiskers obtained by electrospinning in step (4) were subjected to SEM scanning electron microscopy, and the results were as follows: Figure 2 As shown; the diameter of the ceramic bond whisker is 1-4μm and the length is 25-40μm.

[0082] Comparative Preparation Example 1

[0083] Comparative Preparation Example 1 provides a ceramic binder.

[0084] The difference between the above-mentioned ceramic binder and Comparative Example 1 lies in: step (4) in the preparation method of the ceramic binder.

[0085] In the preparation method of the ceramic binder provided in Comparative Preparation Example 1, step (4) electrospinning is: the above-mentioned sol-gel C is loaded into a drum, and ceramic binder whiskers are prepared under the conditions of an injection speed of 0.5 mL / h, an electric field power supply of 30 kV, and a drum speed of 200 r / min; the diameter of the ceramic binder whiskers is 5-8 μm and the length is 10-20 μm.

[0086] Comparative Preparation Example 2

[0087] Comparative Preparation Example 2 provides a ceramic binder.

[0088] The difference between the above-mentioned ceramic binder and Comparative Example 1 lies in: step (4) in the preparation method of the ceramic binder.

[0089] In the preparation method of the ceramic binder provided in Comparative Preparation Example 2, step (4) electrospinning is: the above-mentioned sol-gel C is loaded into a drum, and ceramic binder whiskers are prepared under the conditions of an injection speed of 3 mL / h, an electric field power supply of 30 kV, and a drum speed of 500 r / min; the diameter of the ceramic binder whiskers is 0.5-3 μm, and the length is 30-45 μm.

[0090] Example

[0091] Example 1

[0092] Embodiment 1 provides an ultra-thin cutting blade.

[0093] The preparation of the ultra-thin cutting sheet comprises the following steps:

[0094] (1) Preparation of metal binder: Weigh 20 g of Fe powder, 30 g of CuSn10 pre-alloyed powder, 20 g of Co powder, 5 g of Ni powder, 15 g of Cu powder, and 10 g of FeNi30 pre-alloyed powder, mix them evenly, and put them into a three-dimensional mixer for mixing for 1 hour to obtain a metal binder.

[0095] (2) Preparation of ceramic binder: Prepare the ceramic binder provided in Preparation Example 1.

[0096] (3) Mixing: 70 g of the metal binder obtained in step (1), 15 g of the ceramic binder obtained in step (2), 30 g of diamond and 2 mL of liquid paraffin are placed in a three-dimensional mixer and mixed for 1-2 hours to obtain a premix.

[0097] (4) Pressing: The premix obtained in step (3) is pressed by a four-column hydraulic press and a steel mold is charged to obtain a green compact, so that the green compact has a thickness of 0.22 mm; wherein the pressing is performed by a hydraulic press in the direction of the cutter head height, and the molding pressure is 300 kgf / cm 2 .

[0098] (5) Sintering: The compact obtained in step (4) is sintered by a vacuum hot pressing sintering machine to obtain a cutting sheet preform; wherein the sintering temperature is 700° C., the pressure is 180 MPa, and the time is 1.5 h.

[0099] (6) Grinding: The above-mentioned cutting blade preform is sequentially trimmed on an external cylindrical grinder, a single-end surface thinning device, and an electric spark wire cutting device to obtain an ultra-thin cutting blade; the ultra-thin cutting blade has an outer diameter of 58 mm, an inner diameter of 40 mm, and a thickness of 0.2 mm.

[0100] Embodiment 2-8

[0101] Embodiment 2-8 provides an ultra-thin cutting blade.

[0102] The difference between the above embodiment and embodiment 1 is that the addition amount of each component in the ultra-thin cutting sheet is specifically shown in Table 1.

[0103] Table 1 Components and addition amounts of ultra-thin cutting sheets provided in Examples 1-8

[0104]

[0105] Example 9

[0106] Embodiment 9 provides an ultra-thin cutting blade.

[0107] The difference between the above embodiment and embodiment 1 is that step (5) of the method for preparing the ultra-thin cutting blade is sintering.

[0108] In the above-mentioned method for preparing the ultra-thin cutting blade, step (5) is: using a vacuum hot pressing sintering machine to sinter the pressed green sheet obtained in step (4) to obtain a cutting blade preform; wherein the sintering temperature is 650°C, the pressure is 180MPa, and the time is 2h.

[0109] Example 10

[0110] Embodiment 10 provides an ultra-thin cutting blade.

[0111] The difference between the above embodiment and embodiment 1 is that step (5) of the method for preparing the ultra-thin cutting blade is sintering.

[0112] In the above-mentioned method for preparing the ultra-thin cutting blade, step (5) is: using a vacuum hot pressing sintering machine to sinter the pressed green sheet obtained in step (4) to obtain a cutting blade preform; wherein the sintering temperature is 950°C, the pressure is 180MPa, and the time is 1h.

[0113] Embodiment 11

[0114] Embodiment 11 provides an ultra-thin cutting blade.

[0115] The preparation of the ultra-thin cutting sheet comprises the following steps:

[0116] (1) Preparation of metal binder: Weigh 10 g of Fe powder, 20 g of CuSn10 pre-alloyed powder, 15 g of Co powder, 15 g of Ni powder, 20 g of Cu powder, and 20 g of FeNi30 pre-alloyed powder, mix them evenly, and put them into a three-dimensional mixer for mixing for 1 hour to obtain a metal binder.

[0117] (2) Preparation of ceramic binder: Prepare the ceramic binder provided in Preparation Example 2.

[0118] (3) Mixing: 70 g of the metal binder obtained in step (1), 15 g of the ceramic binder obtained in step (2), 30 g of diamond and 2 mL of liquid paraffin are placed in a three-dimensional mixer and mixed for 1-2 hours to obtain a premix.

[0119] (4) Pressing: The premix obtained in step (3) is pressed by a four-column hydraulic press and a steel mold is charged to obtain a green compact, so that the green compact has a thickness of 0.17 mm; wherein the pressing is performed by a hydraulic press in the direction of the cutter head height, and the molding pressure is 300 kgf / cm 2 .

[0120] (5) Sintering: The compact obtained in step (4) is sintered by a vacuum hot pressing sintering machine, and then cooled naturally to obtain a cutting piece preform; wherein the sintering temperature is 700° C., the pressure is 180 MPa, and the time is 1.5 h.

[0121] (6) Grinding: The above-mentioned cutting blade preform is sequentially trimmed on an external cylindrical grinder, a single-end thinning device, and an electric spark wire cutting device to obtain an ultra-thin cutting blade; the ultra-thin cutting blade has an outer diameter of 58 mm, an inner diameter of 40 mm, and a thickness of 0.15 mm.

[0122] Comparative Example

[0123] Comparative Example 1

[0124] Comparative Example 1 provides an ultra-thin cutting blade.

[0125] The difference between the comparative example and Example 1 is that the addition amount of each component in the ultra-thin cutting sheet is specifically shown in Table 1.

[0126] Table 1 Components and addition amounts of ultra-thin cutting sheets provided in Example 1 and Comparative Examples 1-4

[0127]

[0128] Comparative Example 5

[0129] Comparative Example 5 provides an ultra-thin cutting blade.

[0130] The difference between the above comparative example and Example 1 is that the comparative example 5 uses the ceramic binder provided in Comparative Preparation Example 1.

[0131] Comparative Example 6

[0132] Comparative Example 6 provides an ultra-thin cutting blade.

[0133] The difference between the above comparative example and Example 1 is that the ceramic binder provided in Comparative Preparation Example 2 is used in Comparative Example 6.

[0134] Performance testing

[0135] The bending strength, surface characteristics and service life of the ultra-thin cutting blades obtained in Examples 1-11 and Comparative Examples 1-6 were tested. The test results are shown in Table 2.

[0136] (1) The flexural strength test method refers to GB / T232-2010.

[0137] (2) Service life test method: The ultra-thin cutting blade is installed on the cutting machine, and the cutting performance test is carried out using single crystal silicon. The rotation speed of the ultra-thin cutting blade is 1000 rpm / min, and the feed speed of the single crystal silicon is 1.5 mm / min.

[0138] (3) Rockwell hardness test method refers to GB / T230.1-2009.

[0139] Table 2 Performance test results of ultra-thin cutting blades obtained in Examples 1-11 and Comparative Examples 1-6

[0140]

[0141] According to the test results of Examples 1-11 in Table 2, the ultra-thin cutting blade provided by the present application has a bending strength of >1100 MPa, a hardness of >70 HRB, and a service life of >3600 m, indicating that the ultra-thin cutting blade has excellent cutting strength, impact resistance and service life.

[0142] According to the test results of Examples 1-8 and Comparative Examples 1-4, the present application controls the weight of each component in the ultra-thin cutting blade within the following range: 50-85 parts of metal binder, 20-40 parts of diamond and 10-20 parts of ceramic binder, and an ultra-thin cutting blade with good bending strength, long service life and high hardness can be obtained; and further controlling the weight of each component within the following range: 60-80 parts of metal binder, 20-40 parts of diamond and 10-20 parts of ceramic binder, an ultra-thin cutting blade with better comprehensive performance of bending strength>1200Mpa, hardness>75HRB and service life>3700m can be obtained.

[0143] In Example 1, Example 4-5, and Example 7, the weight ratio of the metal binder to the ceramic binder is further controlled within the range of (4.5-6):1, and the obtained ultra-thin cutting blade has a longer service life.

[0144] According to the test results of Examples 1 and 9-10, the present application controls the sintering temperature between 650-950°C and the sintering time between 1-2h, and can obtain ultra-thin cutting blades with bending strength > 1100Mpa and service life > 3800m.

[0145] According to the test results of Example 1 and Comparative Examples 5-6, the comprehensive performance of bending strength and hardness of the ultra-thin cutting blade obtained in Example 1 of the present application is significantly better than the comprehensive performance of bending strength and hardness of the ultra-thin cutting blade obtained in Comparative Examples 5-6. Therefore, it is explained that the present application controls the injection speed of electrospinning within the range of 0.5-2mL and the equipment speed within the range of 300-500r / min, and can prepare a ceramic binder with excellent performance, and then can obtain an ultra-thin cutting blade with excellent comprehensive performance of bending strength and hardness.

[0146] In summary, the present application provides an ultra-thin cutting blade. By controlling the amount of each component within the above range, an ultra-thin cutting blade with a bending strength of >1100Mpa, a hardness of >70HRB, and a service life of >3600m can be obtained; the weight ratio of the metal binder to the ceramic binder is further controlled within the range of (4.5-6):1, and an ultra-thin cutting blade with a longer service life is obtained. The ultra-thin cutting blade provided by the present application has a long service life and excellent mechanical properties. It will not curl, curl, or deform during long-term use, and has a good application prospect.

[0147] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. An ultra-thin cutting blade, characterized in that: The ultra-thin cutting blade comprises the following components in parts by weight: 60-80 parts of a metal binder, 20-40 parts of diamonds and 10-20 parts of a ceramic binder; The weight ratio of the metal binder to the ceramic binder is (4.5-6):1; The metal binder comprises the following components in parts by weight: 10-20 parts of Fe powder, 20-30 parts of CuSn10 pre-alloyed powder, 10-20 parts of Co powder, 5-15 parts of Ni powder, 15-30 parts of Cu powder and 10-20 parts of FeNi30 pre-alloyed powder; The diamond particle size is 10-50 μm; The ceramic binder has a fiber mesh inside; the fiber has a diameter of 2-5 μm and a length of 20-40 μm; The outer diameter of the ultra-thin cutting blade is 55-60 mm, and the thickness is 0.1-0.5 mm.

2. The method for preparing an ultra-thin cutting sheet according to claim 1, characterized in that: The following steps are involved: Preparation of ceramic binder and calcination; The step of preparing the ceramic binder comprises: electrostatic spinning; wherein the injection speed of the electrostatic spinning is 0.5-2 mL, and the equipment rotation speed is 300-500 r / min.

3. The method for preparing an ultra-thin cutting sheet according to claim 2, characterized in that: The calcination temperature is 500-600° C. and the calcination time is 5-7 hours.

4. The method for preparing an ultra-thin cutting sheet according to claim 2, characterized in that: The step of preparing the ceramic binder also includes ball milling.

5. The method for preparing an ultra-thin cutting sheet according to claim 2, characterized in that: The preparation method of the ultra-thin cutting blade also includes sintering; the specific steps of the sintering are: placing the green body obtained by pressing in a graphite mold, and sintering at a temperature of 650-950° C. for 1-2 hours.

6. The method for preparing an ultra-thin cutting sheet according to claim 5, characterized in that: The method for preparing the ultra-thin cutting blade further comprises the following steps: preparing a metal binder, mixing materials, pressing and grinding.

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