CN108582504B - Energy-saving efficient diamond saw blade and preparation method thereof - Google Patents
Energy-saving efficient diamond saw blade and preparation method thereof Download PDFInfo
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- CN108582504B CN108582504B CN201810434588.XA CN201810434588A CN108582504B CN 108582504 B CN108582504 B CN 108582504B CN 201810434588 A CN201810434588 A CN 201810434588A CN 108582504 B CN108582504 B CN 108582504B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/12—Saw-blades or saw-discs specially adapted for working stone
- B28D1/121—Circular saw blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature
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Abstract
The invention relates to an energy-saving and efficient diamond saw blade, and belongs to the technical field of diamond sintering tools. The energy-saving high-efficiency diamond saw blade comprises a circular steel substrate and a composite multi-layer diamond tool bit welded on the circular steel substrate, wherein the composite multi-layer diamond tool bit comprises a plurality of diamond cutting layers, and each diamond cutting layer consists of a matrix and diamond particles impregnated in the matrix; the concentration of diamond particles in the diamond cutting layer in the middle is greater than that on both sides; the hardness of the carcass in the middle diamond-cut layer is less than the hardness of the carcass on both sides. The energy-saving efficient diamond saw blade is applied to processing of stones such as granite, marble and the like and cutting of concrete pavements, and has the characteristics of high cutting speed, high cutting sharpness and stable performance; and the energy consumption is reduced, and the used diamond does not contain rare Co elements and other components, so that the tool cost is reduced.
Description
Technical Field
The invention relates to the technical field of diamond sintering tools, in particular to an energy-saving and efficient diamond saw blade and a preparation method thereof.
Background
Since the company G.E. in the United states of 1953 starts to synthesize the artificial diamond, the types and specifications of the diamond tools used by human beings are greatly developed, and since the artificial diamond is successfully synthesized in 1963, the diamond tools in China have a development path from inexistence to small to large, from dispersion to collection and from products to industry. In the aspect of processing diamond tools made of hard and brittle non-metallic materials, China has become a world-wide producing country. Diamond saw blades, diamond bits and diamond grinding wheels are three major varieties of diamond tools, wherein the diamond saw blades are the leading products of the diamond tools, and account for more than 90% of the diamond tools by number, and the diamond saw blades are generally used for cutting brittle and hard non-metal materials and cutting metal materials, for example, the diamond saw blades are generally used for cutting granite, marble, concrete, asphalt and refractory materials and cutting metal materials such as silicon, aluminum alloy, magnesium alloy and the like. Diamond saw blades for cutting brittle and hard non-metallic materials in the prior art are generally formed of a circular steel substrate and a plurality of diamond segments welded on the outer circumference thereof, and the diamond segments are generally formed by mixing diamond particles and metal powder, and then cold-pressing or hot-pressing, and sintering. Compared with the 20 th century and the 80 th era, the service life and the cutting efficiency of the current diamond cutting head are respectively improved by about 1 time and 3 times. In order to improve the cutting efficiency, a sandwich and multi-vision structure tool bit is developed in the prior art, and compared with a common block tool bit, the tool bit increases the free surface of a brittle and hard non-metal material such as a stone material to be cut, so that the stone material is easier to break, the cutting sharpness is improved, the cutting efficiency is improved, the power consumption is reduced, and the cutting cost is reduced.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide an energy-saving and high-efficiency diamond saw blade and a preparation method thereof.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
the utility model provides an energy-conserving high-efficient diamond saw blade, includes circular steel substrate and the compound multilayer diamond segments of welding on circular steel substrate which characterized in that: the diamond cutting layer is formed by a matrix and diamond particles impregnated in the matrix; and the concentration of diamond particles in the diamond cutting layers positioned in the middle is greater than that of the diamond cutting layers positioned on both sides; the hardness of the matrix in the diamond cutting layer in the middle is lower than that of the matrix in the diamond cutting layers on both sides.
The diamond cutting layers are arranged in the middle, the concentration of the diamond particles in the middle diamond cutting layers is 2.5-3.5 wt% of the weight of the tire body, the concentration of the diamond particles in the diamond cutting layers on two sides is 2.0-3.0 wt% of the weight of the tire body, and the concentration of the diamond particles in the middle diamond cutting layers is 0.3-0.6 wt% higher than that of the diamond particles in the diamond cutting layers on two sides.
The HRB hardness of the tire body in the middle diamond cutting layer is 93-100, the HRB hardness of the tire body in the diamond cutting layers on the two sides is 100-108, and the HRB hardness of the tire body in the diamond cutting layers on the two sides is 5-8 higher than that of the tire body in the middle diamond cutting layer.
The number of the diamond cutting layers is 3 or 5, and the number of the metal layers is 2 or 4; the thickness of the diamond cutting layer is 1.5-3.0 mm; the thickness of the metal layer is 0.5-1.2 mm.
Wherein, the diamond cutting layer in the middle and the diamond cutting layers at two sides are formed by sintering diamond particles and matrix powder through hot pressing; preferably, the hot-pressing sintering temperature is 725-800 ℃, and the pressure is 250-300 kg/cm2And the heat preservation time is 150-250 seconds.
Wherein the matrix powder adopted by the diamond cutting layer positioned in the middle consists of 30-40 wt% of bronze powder, 1-5 wt% of tin powder, 0.10-0.15 wt% of graphite powder, 0.1-0.6 wt% of liquid paraffin and the balance of prealloying powder.
Wherein, the matrix powder adopted by the diamond cutting layers positioned at two sides consists of 10 to 15 weight percent of bronze powder, 1 to 5 weight percent of tin powder, 0.1 to 0.6 weight percent of liquid paraffin and the balance of prealloying powder.
Wherein the prealloyed powder is FeCuSnNi prealloyed powder, the prealloyed powder contains 35.5-36.5 wt% of Cu, 7.5-9.0 wt% of Sn, 11.5-12.2 wt% of Ni and the balance of Fe, and the Fisher size of the prealloyed powder is 6-8 μm.
The second aspect of the invention also relates to a preparation method of the energy-saving and high-efficiency diamond saw blade.
The preparation method of the energy-saving and high-efficiency diamond saw blade comprises the step of welding the circular steel substrate and the composite multilayer diamond tool bit, and the preparation of the composite multilayer diamond tool bit comprises the following steps:
(1) uniformly mixing the diamond particles and the matrix powder according to the proportion, and performing cold pressing to obtain a diamond blank layer positioned in the middle and diamond blank layers positioned on two sides;
(2) cold-pressing bronze powder to form a metal blank layer;
(3) forming a laminated structure by the diamond blank layer positioned in the middle, the diamond blank layers positioned on two sides and the metal blank layer in sequence;
(4) carrying out hot-pressing sintering on the laminated structure, wherein the temperature of the hot-pressing sintering is 725-800 ℃, and the pressure is 250-300 kg/cm2And keeping the temperature for 150-250 seconds.
Compared with the prior art, the energy-saving and high-efficiency diamond saw blade has the following beneficial effects:
the energy-saving efficient diamond saw blade is applied to processing of stones such as granite, marble and the like and cutting of concrete pavements, and has the characteristics of high cutting speed, high cutting sharpness and stable performance; and the energy consumption is reduced, and the used diamond does not contain rare Co elements and other components, so that the tool cost is reduced.
Drawings
Fig. 1 is a schematic cross-sectional view of an energy-saving and high-efficiency diamond saw blade using the present invention.
FIG. 2 is a schematic representation of a composite multi-layer diamond tip for use in a saw blade of the present invention.
Figure 3 is a graph showing the typical variation of cutting sharpness (constant nominal voltage) for a saw blade of the present invention.
FIG. 4 is a typical cutting-sharpness fluctuation pattern (constant rated voltage) of the saw blade of the comparative example.
Detailed Description
The composite multilayer diamond tip of the present invention will be further described with reference to specific examples to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concepts and aspects of the present invention.
The invention relates to an energy-saving and high-efficiency diamond saw blade, as shown in figure 1, an energy-saving and high-efficiency diamond saw blade 10 comprises a circular steel base body 11, the circular steel base body 11 is processed into a disc shape with preset diameter and thickness by a steel plate and the like according to the preset design, a mounting hole 12 is processed at the center of the circular steel base body for mounting a transmission shaft driven by a motor, chip removing grooves 13 are also formed on the outer circumference of the circular steel base body 11 at equal intervals, a composite multi-layer diamond tool bit 20 is welded on the outer circumference of the circular steel base body 11, and the welding method can adopt a high-frequency welding process or a laser welding process, for.
As shown in fig. 2, the composite multilayer diamond tip 20 is a laminated sintered body in which a diamond thin layer 21 and a metal bonding layer 22 are provided at intervals. The diamond thin layers and the metal bonding layers are arranged at intervals in a direction perpendicular to the surface of the circular steel substrate shown in fig. 1 (i.e., in a direction parallel to the central axis of the circular steel substrate 11 shown in fig. 1). The thickness of the diamond thin layer (single layer) is 1.5-5.0 mm, and preferably 2.0-3.0 mm. The thickness of the metal bonding layer (single layer) is 0.5-1.2 mm. The composite multilayer diamond tool bit is theoretically analyzed, so that the contact area between the cutting surface of the tool bit and a cutting material is reduced, the etching depth of diamond to the cutting material is improved, and the sharpness is improved. The diamond thin layer is formed by hot-pressing and sintering diamond particles and metal brazing filler metal. And further, the brazing filler metal consists of 18-38 wt% of copper powder, 15-25 wt% of iron powder, 2-9 wt% of nickel powder, 1-6 wt% of tin powder, 2-9 wt% of high-carbon ferrochrome powder, 1-6 wt% of medium-carbon ferroboron, 0.1-0.9 wt% of liquid paraffin and the balance of pre-alloyed powder. The content of the diamond particles is 1.4-4.0 wt% of the brazing filler metal, preferably 1.5-3.1 wt%, and more preferably 1.5-2.9 wt%. The prealloying powder is obtained by a chemical coprecipitation method, and the prealloying powder contains 32-50 wt% of Cu, 2-9 wt% of Ni, 2-10 wt% of Re and the balance of Fe; the pre-alloyed powder has an average particle diameter of 6-9 μm. Although the metal brazing filler metal adopted by the invention does not contain Co which is expensive and scarce in domestic resources, the prealloy powder prepared by the chemical coprecipitation method is mixed with high-carbon ferrochrome powder, medium-carbon ferroboron and conventional Cu, Fe, Ni and Sn powder for use, so that the hot-pressing sintering temperature is obviously reduced, the structure of the matrix is compact, the matrix wear performance matched with high-speed cutting (high-speed cutting of concrete, marble and granite) can be simultaneously obtained on the basis of ensuring good holding force between the hot-pressing sintered matrix and diamond particles, the HRB value of the matrix wear performance can reach 95-108, the self-sharpening of the diamond particles under the high-speed cutting condition is ensured, the prepared energy-saving high-efficiency diamond saw blade has excellent cutting stability, and good service performance is ensured.
In the examples of the present invention and the comparative examples, the diamond particles used had a particle size of 50/60 (corresponding to a particle size of 300 to 250 μm). The adopted prealloying powder is FeCuSnNi prealloying powder, the prealloying powder contains 36.0 wt% of Cu, 8.1 wt% of Sn, 12.0 wt% of Ni and the balance of Fe, and the Fisher particle size of the prealloying powder is 6-8 mu m. Bronze powder having a composition of 10 wt% of Sn, 1.2 wt% of Ni, 0.9 wt% of Ti and the balance of Cu was used, the bronze powder was prepared from atomized powder, and heat-treated at 780 ℃ for 30min to obtain bronze powder having an average particle diameter of about 35 μm and a maximum particle diameter of 75 μm or less. Inventive and comparative examples composite multilayer diamond tips of 30mm height and 40mm width were prepared, each comprising 3 diamond segments of 3.0mm thickness with a bronze powder bonding layer of 1.0mm thickness disposed between adjacent diamond segments. The diameter of the adopted circular steel substrate is 340mm, and 24 composite multilayer diamond tool bits are welded on each energy-saving and efficient diamond saw blade.
The preparation method of the energy-saving and high-efficiency diamond saw blade comprises the following steps:
1. according to the requirements of the drawing, the steel plate is subjected to quenching heat treatment, tempering, laser cutting of shape, tempering, grinding of plane, grinding of inner hole, grinding of outer circle and deburring to manufacture a circular steel matrix.
2. Uniformly mixing the matrix powder and the diamond particles, cold-pressing the mixture to form a diamond blank layer positioned in the middle and diamond blank layers positioned on two sides, and cold-pressing the diamond blank layer positioned in the middleThe diamond blank layers and the metal blank layers on the two sides form a laminated structure according to the sequence, the laminated structure is subjected to hot pressing sintering, the grinding wheel abrasive belt is used for grinding to manufacture the composite multilayer diamond tool bit, the hot pressing sintering temperature is 725-800 ℃, and the pressure is 250-300 kg/cm2And keeping the temperature for 150-250 seconds.
3. Laser or high frequency welding
Putting the composite multilayer diamond tool bit and the circular steel substrate together on the corresponding substrate position according to the drawing requirements, adjusting the light spot of a laser welding machine to the proper position of the tool bit and the substrate, starting a laser welding machine for welding to ensure that the tool bit and the substrate are welded together at the moment of laser penetration, and then welding at the speed of 600N/mm2The strength standard performs weld strength testing on each diamond tip.
4. High frequency welding
Install tool bit and base member on dedicated high frequency welding frame, clear up the base member surface, put the silver soldering lug, adopt high frequency heating to weld the tool bit in the side about 650/750, weld and whether the backlash that measures the tool bit and arrange with the percentage table accords with the drawing requirement.
5. Polishing, spraying paint and inspecting
The welded energy-saving efficient diamond saw blade is firstly subjected to sand blasting on the inner side surface of the tool bit, then an L-shaped grinding wheel is used for grinding the working surface of the diamond tool bit, the diamond is exposed, the welded energy-saving efficient diamond saw blade is ground by a grinding machine to ensure that the surface of a substrate is bright, and then 600N/mm is used for grinding the substrate to be bright2The intensity standard is used for detecting the safe welding intensity of each diamond tool bit, unqualified reworking is carried out, surface painting and drying are carried out if the diamond tool bits are qualified, so that the surface is prevented from rusting, and finally silk printing and laser marking are carried out.
Example 1
3.0kg of bronze powder, 0.3kg of tin powder, 0.01kg of graphite powder and 6.64kg of prealloyed powder are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.35kg of diamond particles are added, the materials are continuously mixed for 3 hours, and then the powder is poured into a die to be cold-pressed and molded to obtain a diamond blank layer in the middle;
1.0kg of bronze powder, 0.3kg of tin powder and 8.65kg of prealloyed powder are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.30kg of diamond particles are added, the materials are continuously mixed for 3 hours, and then the powder is poured into a mold to be cold-pressed and molded to obtain diamond blank layers on two sides;
pouring bronze powder into a die for cold press molding to obtain a metal blank layer;
arranging the diamond blank layer and the metal binder blank layer at intervals to form a laminated structure (3 layers of diamond blank layers and 2 layers of metal binder blank layers), and then performing hot-pressing sintering at 760 ℃ under 270kg/cm2The holding time was 200 seconds.
Putting the prepared composite multilayer diamond tool bit and the substrate together at the position of the substrate corresponding to the requirement of a drawing, adjusting the light spot of a laser welding machine to the proper position of the tool bit and the substrate, starting a laser welding machine for welding to ensure that the tool bit and the substrate are welded together at the moment of laser penetration, and then welding at the speed of 600N/mm2The welding strength of each diamond tool bit is detected according to the strength standard, then the high-frequency welding is adopted for protecting teeth, the surface of the base body is polished by a polishing machine for the energy-saving and high-efficiency diamond saw blade after welding to be bright, then the working surface of the diamond tool bit is polished by a special grinding wheel, the diamond is exposed, then the surface is sprayed with paint and dried to prevent the surface from rusting, and finally 600N/mm is used for welding2And the strength standard detects the welding strength of each diamond tool bit, unqualified reworking is carried out, surface painting and drying are carried out if the diamond tool bit is qualified, so as to prevent the surface from rusting, and finally silk printing and laser marking are carried out.
Example 2
Putting 4.0kg of bronze powder, 0.4kg of tin powder, 0.01kg of graphite powder and 5.55kg of prealloyed powder into a mixing barrel, mixing for 30 minutes, adding 0.04kg of liquid paraffin and 0.30kg of diamond particles, continuously mixing for 3 hours, filling the powder into a mold, and performing cold press molding to obtain a diamond blank layer positioned in the middle;
1.5kg of bronze powder, 0.5kg of tin powder and 7.95kg of prealloyed powder are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.30kg of diamond particles are added, the materials are continuously mixed for 3 hours, and then the powder is poured into a mold to be cold-pressed and molded to obtain diamond blank layers on two sides;
pouring bronze powder into a die for cold press molding to obtain a metal blank layer;
arranging the diamond blank layer and the metal binder blank layer at intervals to form a laminated structure (3 diamond blank layers and 2 metal binder blank layers), and performing hot-pressing sintering at 750 ℃ and 280kg/cm2The holding time was 210 seconds. And after hot-pressing sintering, grinding the working surface of the diamond tool bit by using a grinding wheel abrasive belt to expose the diamond particles.
Putting the prepared composite multilayer diamond tool bit and the substrate together at the position of the substrate corresponding to the requirement of a drawing, adjusting the light spot of a laser welding machine to the proper position of the tool bit and the substrate, starting a laser welding machine for welding to ensure that the tool bit and the substrate are welded together at the moment of laser penetration, and then welding at the speed of 600N/mm2The welding strength of each diamond tool bit is detected according to the strength standard, then the high-frequency welding is adopted for protecting teeth, the surface of the base body is polished by a polishing machine for the energy-saving and high-efficiency diamond saw blade after welding to be bright, then the working surface of the diamond tool bit is polished by a special grinding wheel, the diamond is exposed, then the surface is sprayed with paint and dried to prevent the surface from rusting, and finally 600N/mm is used for welding2And the strength standard detects the welding strength of each diamond tool bit, unqualified reworking is carried out, surface painting and drying are carried out if the diamond tool bit is qualified, so as to prevent the surface from rusting, and finally silk printing and laser marking are carried out.
Comparative example 1
3.0kg of bronze powder, 0.3kg of tin powder, 0.01kg of graphite powder and 6.64kg of prealloyed powder are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.35kg of diamond particles are added, the materials are continuously mixed for 3 hours, and then the powder is poured into a die to be cold-pressed and molded to obtain a diamond blank layer; pouring bronze powder into a die for cold press molding to obtain a metal blank layer; arranging the diamond blank layer and the metal binder blank layer at intervals to form a laminated structure (3 layers of diamond blank layers and 2 layers of metal binder blank layers), and then performing hot-pressing sintering at 760 ℃ under 270kg/cm2The holding time was 200 seconds. Grinding wheel abrasive belt for grinding diamond tool bit after hot-pressing sinteringThe working surface exposes the diamond particles. Putting the prepared composite multilayer diamond tool bit and the substrate together at the position of the substrate corresponding to the requirement of a drawing, adjusting the light spot of a laser welding machine to the proper position of the tool bit and the substrate, starting a laser welding machine for welding to ensure that the tool bit and the substrate are welded together at the moment of laser penetration, and then welding at the speed of 600N/mm2The welding strength of each diamond tool bit is detected according to the strength standard, then the high-frequency welding is adopted for protecting teeth, the surface of the base body is polished by a polishing machine for the energy-saving and high-efficiency diamond saw blade after welding to be bright, then the working surface of the diamond tool bit is polished by a special grinding wheel, the diamond is exposed, then the surface is sprayed with paint and dried to prevent the surface from rusting, and finally 600N/mm is used for welding2And the strength standard detects the welding strength of each diamond tool bit, unqualified reworking is carried out, surface painting and drying are carried out if the diamond tool bit is qualified, so as to prevent the surface from rusting, and finally silk printing and laser marking are carried out.
Comparative example 2
1.0kg of bronze powder, 0.3kg of tin powder and 8.65kg of prealloyed powder are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.30kg of diamond particles are added, the materials are continuously mixed for 3 hours, and then the powder is poured into a mold to be cold-pressed and molded to obtain a diamond blank layer; pouring bronze powder into a die for cold press molding to obtain a metal blank layer; arranging the diamond blank layer and the metal binder blank layer at intervals to form a laminated structure (3 layers of diamond blank layers and 2 layers of metal binder blank layers), and then performing hot-pressing sintering at 760 ℃ under 270kg/cm2The holding time was 200 seconds. And after hot-pressing sintering, grinding the working surface of the diamond tool bit by using a grinding wheel abrasive belt to expose the diamond particles. Putting the prepared composite multilayer diamond tool bit and the substrate together at the position of the substrate corresponding to the requirement of a drawing, adjusting the light spot of a laser welding machine to the proper position of the tool bit and the substrate, starting a laser welding machine for welding to ensure that the tool bit and the substrate are welded together at the moment of laser penetration, and then welding at the speed of 600N/mm2The welding strength of each diamond tool bit is detected according to the strength standard, then the high-frequency welding tooth protection is adopted, and after welding, the surface of the base body is polished by a polishing machine for the energy-saving and high-efficiency diamond saw bladePolishing the working surface of the diamond tool bit with a special grinding wheel to expose the diamond, spraying paint on the surface, drying to prevent surface rusting, and polishing with a speed of 600N/mm2And the strength standard detects the welding strength of each diamond tool bit, unqualified reworking is carried out, surface painting and drying are carried out if the diamond tool bit is qualified, so as to prevent the surface from rusting, and finally silk printing and laser marking are carried out.
The cutting test was carried out using the diamond circular saw blades prepared in examples 1 to 2 and comparative examples 1 to 2. Then, the concrete (compressive strength of 360 kgf/cm) was treated at the same rate (0.8m/min) with a constant rated voltage2) Cutting experiments (cut depth of 50mm) were carried out, each diamond saw blade having a total cut length of 100 m. Fig. 3 and 4 show the fluctuation graphs of the cutting current with the cutting distance (reflecting seven fluctuations of sharpness) in the saw blades of example 1 and comparative example 1, respectively, and it can be seen that the saw blade manufactured by using the blade of comparative example 1 requires a smaller applied cutting current in the initial stage, but the cutting current fluctuates and increases with the increase of the cutting distance, reflecting the increase of the cutting resistance, and increases the energy consumption required for maintaining the corresponding cutting rate, and at the same time, the cutting stability is poor due to the large fluctuation of the cutting performance, while the saw blade manufactured by using the blade of example 1 has a smaller fluctuation of the cutting current with the increase of the distance, and the average cutting current is stabilized at about 14A, thus it can be seen that the blade manufactured by example 1 has a good sharpness and a stable cutting performance. Although not shown, example 1 also showed a similar rule as that of comparative example 2, that is, the cutting edge prepared in example 1 was superior in sharpness and more stable in cutting performance.
In addition, table 1 shows the wear properties calculated according to the above cutting experiment.
TABLE 1
It is to be understood that the present invention is not limited to the above-described embodiments, and various insubstantial modifications of the invention without modification or direct application of the invention to other applications are within the scope of the invention.
Claims (4)
1. The utility model provides an energy-conserving high-efficient diamond saw blade, includes circular steel substrate and the compound multilayer diamond segments of welding on circular steel substrate which characterized in that: the diamond cutting layer is formed by a matrix and diamond particles impregnated in the matrix; and the concentration of diamond particles in the diamond cutting layers positioned in the middle is greater than that of the diamond cutting layers positioned on both sides; the hardness of the matrix in the diamond cutting layer in the middle is less than that of the matrix in the diamond cutting layers on two sides; the diamond cutting layers in the middle have the diamond particle concentration of 2.5-3.5 wt% of the weight of the tire body, the diamond cutting layers on two sides have the diamond particle concentration of 2.0-3.0 wt% of the weight of the tire body, and the diamond particle concentration in the diamond cutting layers in the middle is 0.3-0.6 wt% higher than that in the diamond cutting layers on two sides; HRB hardness of the tire body in the middle diamond cutting layer is 93-100, HRB hardness of the tire body in the diamond cutting layers on two sides is 100-108, and HRB hardness of the tire body in the diamond cutting layers on two sides is 5-8 higher than that of the tire body in the middle diamond cutting layer; the number of the diamond cutting layers is 3 or 5, and the number of the bronze layers is 2 or 4; the thickness of the diamond cutting layer is 1.5-3.0 mm; the thickness of the bronze layer is 0.5-1.2 mm; the matrix powder adopted by the diamond cutting layer positioned in the middle consists of 30 to 40 weight percent of bronze powder, 1 to 5 weight percent of tin powder, 0.10 to 0.15 weight percent of graphite powder, 0.1 to 0.6 weight percent of liquid paraffin and the balance of pre-alloyed powder; the matrix powder adopted by the diamond cutting layers positioned at two sides consists of 10-15 wt% of bronze powder, 1-5 wt% of tin powder, 0.1-0.6 wt% of liquid paraffin and the balance of pre-alloyed powder; the diamond cutting layer positioned in the middle and the diamond cutting layers positioned on two sides are formed by sintering diamond particles and matrix powder through hot pressing.
2. The energy-saving and high-efficiency diamond saw blade as claimed in claim 1, wherein: the hot-pressing sintering temperature is 725-800 ℃, and the pressure is 250-300 kg/cm2And the heat preservation time is 150-250 seconds.
3. The energy-saving and high-efficiency diamond saw blade as claimed in claim 1, wherein: the prealloyed powder is FeCuSnNi prealloyed powder, the prealloyed powder contains 35.5-36.5 wt% of Cu, 7.5-9.0 wt% of Sn, 11.5-12.2 wt% of Ni and the balance of Fe, and the Fisher size of the prealloyed powder is 6-8 mu m.
4. The method for manufacturing an energy-saving and high-efficiency diamond saw blade according to claim 1, comprising the step of welding the circular steel substrate and the composite multi-layer diamond tool bit, wherein the manufacturing of the composite multi-layer diamond tool bit comprises the following steps:
(1) uniformly mixing the diamond particles and the matrix powder according to the proportion, and performing cold pressing to obtain a diamond blank layer positioned in the middle and diamond blank layers positioned on two sides;
(2) cold-pressing bronze powder to form a metal blank layer;
(3) forming a laminated structure by the diamond blank layer positioned in the middle, the diamond blank layers positioned on two sides and the metal blank layer in sequence;
(4) carrying out hot-pressing sintering on the laminated structure, wherein the temperature of the hot-pressing sintering is 725-800 ℃, and the pressure is 250-300 kg/cm2And keeping the temperature for 150-250 seconds.
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| CN201810434588.XA CN108582504B (en) | 2018-05-07 | 2018-05-07 | Energy-saving efficient diamond saw blade and preparation method thereof |
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| CN201810434588.XA CN108582504B (en) | 2018-05-07 | 2018-05-07 | Energy-saving efficient diamond saw blade and preparation method thereof |
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| CN108582504A CN108582504A (en) | 2018-09-28 |
| CN108582504B true CN108582504B (en) | 2020-05-05 |
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| CN110091442B (en) * | 2019-05-15 | 2021-07-23 | 德淮半导体有限公司 | Cutter for cutting wafer and cutting method |
| CN110744063A (en) * | 2019-09-05 | 2020-02-04 | 江苏锋泰工具有限公司 | Preparation method of composite ceramic cutting saw blade |
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