CN111168588A - Brazing grinding wheel based on hard alloy-diamond film particles as abrasive and manufacturing method thereof - Google Patents
Brazing grinding wheel based on hard alloy-diamond film particles as abrasive and manufacturing method thereof Download PDFInfo
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- CN111168588A CN111168588A CN202010008098.0A CN202010008098A CN111168588A CN 111168588 A CN111168588 A CN 111168588A CN 202010008098 A CN202010008098 A CN 202010008098A CN 111168588 A CN111168588 A CN 111168588A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/009—Tools not otherwise provided for
Abstract
The invention provides a method for preparing a brazing grinding wheel based on hard alloy-diamond film particles as grinding materials, which comprises the following steps: 1) preparing a diamond film on the end face of the hard alloy matrix to obtain an abrasive material; wherein the ratio of the thickness of the diamond film to the thickness of the hard alloy substrate is 1: 10-30; 2) and mounting the grinding material on the mounting hole of the grinding wheel base body added with the brazing filler metal, and brazing. The grinding wheel prepared by the invention avoids the defect of low bonding strength between the diamond grinding material and the metal matrix caused by the fact that diamond particles do not form firm chemical bond bonding with the metal matrix in the traditional manufacturing technology, and simultaneously can ensure the mounting direction of the diamond particles with the best processing efficiency, and the processing efficiency and the service life of the grinding wheel are greatly superior to those of the traditional diamond grinding wheel.
Description
Technical Field
The invention belongs to the technical field of grinding wheel preparation, and particularly relates to a method for preparing a brazing grinding wheel based on hard alloy-diamond film particles as grinding materials.
Background
Currently, the main bonding methods of diamond grinding wheels include: the multilayer sintered grinding wheel, the electroplated grinding wheel and the brazed grinding wheel are three types:
(1) and sintering the diamond grinding wheel. The diamond grinding wheel is the earliest grinding wheel type, the diamond grinding wheel is mainly manufactured by a high-temperature sintering method, the bonding agent is mainly made of metals such as bronze, the diamond grinding wheel has the advantages of convenience in forming, complex parts machining and the like, and the diamond grinding wheel is widely used for grinding various materials. However, with the development of grinding technology, the defects are gradually revealed, and the following three aspects are mainly found:
a. because the sintering is to process the whole workpiece at high temperature, the matrix deformation exists to a greater extent, and the grinding precision of the grinding wheel is greatly reduced;
b. in principle, the sintered diamond grinding wheel only embeds diamond abrasive particles in a bonding agent, and the diamond abrasive particles are easy to fall off integrally along with the gradual increase of grinding force, and finally the grinding wheel is failed [1 ]. Therefore, the multilayer sintered diamond grinding wheel is easy to cause the integral falling phenomenon of the grinding wheel in the heavy-load grinding process, so that the application of the diamond grinding material can not be fully exerted in the grinding process.
c. The abrasive of the sintered diamond grinding wheel is diamond particles, the hardness and the wear resistance of the diamond particles are anisotropic, but the diamond particles are randomly distributed in the arrangement direction of the sintered diamond grinding wheel, so that the optimal processing efficiency of the diamond particles cannot be exerted.
(2) Electroplating the diamond grinding wheel. The electroplated diamond grinding wheel is manufactured by an electrochemical method, a formed metal grinding wheel base body is used, and diamond particles are embedded in plating metal in the electroplating process through the working procedures of pretreatment, sanding, electroplating and the like to form the diamond grinding wheel.
The integral high-temperature processing is avoided, so that the grinding wheel is not deformed, the forming precision is higher than that of a sintered grinding wheel, and the grinding wheel does not need to be trimmed. Therefore, the method is widely applied inside and outside China in the efficient grinding process, for example, alloy steel is processed by using an electroplated grinding wheel by GE company in America, and automobile parts are processed by using the electroplated grinding wheel by Litton industry manufacturing company in America [2 ].
However, as the electroplated diamond grinding wheel is widely used, the disadvantages thereof are gradually exposed. Research shows that the diamond abrasive, the plating alloy and the matrix on the electroplated grinding wheel do not form metallurgical bonding in the true sense, and a large amount of abrasive is embedded or embedded in the matrix by brazing filler metal. Therefore, the bonding strength is greatly weakened, the holding granularity of the abrasive particles is small, and the grinding wheel is easy to lose efficacy along with the falling of the abrasive particles in the heavy-load grinding process. Meanwhile, the diamond particles are randomly distributed in the distribution direction in the grinding wheel of the electroplated diamond, and the optimal processing efficiency of the diamond particles cannot be exerted.
Therefore, the traditional sintered and electroplated diamond grinding wheel has the advantages that only mechanical embedding and embedding are formed among the diamond grinding material, the brazing filler metal and the grinding wheel matrix, so that the bonding strength among the grinding material, the brazing filler metal and the matrix is low, the sintered diamond grinding wheel and the electroplated diamond grinding wheel are easy to cause the integral falling phenomenon of the grinding wheel in the heavy-load grinding process, and the application of the superhard grinding material cannot be fully exerted in the high-efficiency grinding process.
In order to improve the bonding strength of the electroplated grinding wheel, the embedding depth can be increased, but as the embedding depth is increased, the exposure height of the super-hard grinding material is reduced, so that the chip containing space in the grinding process is reduced. When the grinding dust is increased continuously, the grinding wheel is easy to block, the grinding performance is reduced, and even the defects of grinding burn and the like occur.
In order to improve the bonding strength among the diamond abrasive, the brazing filler metal alloy and the metal grinding wheel matrix, some domestic and foreign scholars make initial researches on the aspects of metallizing the surface of the abrasive grain [3] and adding some active elements in the brazing filler metal [4], but the great progress on improving the bonding strength is not made. Therefore, only a method for fundamentally changing the bonding strength among the abrasive, the brazing filler metal and the substrate is found, and the advantages of the superhard abrasive on the high-efficiency grinding technology can be fully exerted.
(3) High-temperature vacuum brazing diamond grinding wheel
In order to meet the technical requirements of grinding workpieces (high grinding efficiency, small workpiece surface roughness and the like), the combination mode of the superhard grinding material and the grinding wheel matrix is also continuously improved and developed. Until the middle and later 90s, experts and scholars at home and abroad begin to pay attention to high-temperature vacuum brazing for manufacturing diamond grinding wheels, and the abrasive particles are firmly held by a bonding agent layer through the actions of dissolution, diffusion, combination and the like on the interfaces of the abrasive particles, brazing filler metal and a steel matrix, so that the diamond particle abrasive and the metal grinding wheel matrix have higher brazing bonding strength [5-6 ].
However, diamond is difficult to wet by most solders, and has poor thermal stability and low linear expansion coefficient (1.2 × 10)-6～4.5×10-6) Easy to generate thermal stress during soldering process [7-8 ]]. Therefore, a large number of students are struggling to systematically try and research the brazing diamond technology in hopes of brazing diamondThe tool manufacturing aspect makes a stage breakthrough.
For example, in the Switzerland A K Chattopadhyay et al, NiCrFeSiB solder having an oxygen content of 0.5% is uniformly applied to the surface of a steel substrate, and then diamond abrasive grains are arranged on the surface of the alloy layer. Carrying out high-frequency induction brazing [9] at the heating temperature of 1080 ℃ and the heat preservation time of 30 seconds under the protection of an argon atmosphere environment by adopting a flame spraying method; the Nanjing aerospace university Yao Zhengjun et al adopts self-developed Ni-Cr alloy powder to perform diamond high-temperature brazing in an Ar gas protection radiation furnace [10 ]. Machu et al uses Cr powder + NiCr13P4 alloy as brazing filler metal to braze the diamond abrasive particles on the surface of steel matrix, the brazing temperature is 950 deg.C, and the vacuum degree is 0.2Pa 11.
F A Khalid et al adopts Cu-Sn-Ti alloy powder to braze diamond in vacuum, and analyzes the components and the morphology structure of interface bonding by means of a scanning electron microscope and the like, and the result shows that the bonding interface has obvious layering phenomenon, and the TiC structure close to the side of the abrasive particles is cubic and discontinuous [12 ]; guomeishi et al, Nanjing aerospace university, brazes non-coated diamonds by using (Cu90Sn10)85Ti15 alloy powder at the heating temperature of 900 ℃ and the heat preservation time of 8min, and performs microstructure analysis on the joint of the diamond and the brazing filler metal interface; t Yamazak, J T Lower and the like replace diamond tools prepared by a traditional electroplating method, and Ag-based brazing filler metal added with Ti, In, V and other elements is adopted to braze the diamond tools [13-14] In vacuum under certain process parameters; the inkstone and the like select copper-based brazing filler metal to braze diamonds in vacuum on the surface of a steel matrix, and the influence of different brazing temperatures on an interface structure and bonding strength is analyzed, and the results show that if the brazing effect is good, the heating temperature needs to be maintained between 880 ℃ and 930 ℃, and the heat preservation time is about 10min 15.
In the high-temperature vacuum brazing process, the thermal expansion coefficients of the brazing filler metal, the diamond and the catalyst metal inside the brazing filler metal are different, so that large residual stress exists at the abrasive particles and the bonding interface, the brazing filler metal can generate chemical erosion action on the surface of the diamond, the mechanical performance of the diamond is greatly reduced, and the abrasive particles are cracked. Thus, although research into the high temperature brazing of diamond has been in progress for decades, there is a continuing search for how to apply this technique to production practices.
In order to solve the problem of low bonding strength between the diamond abrasive and the metal matrix, the prior product mainly adopts the following technical approaches:
1. and improving the sintering process. The diamond surface metallization is achieved during sintering to improve bond strength with the matrix, i.e. strong carbide metal powders are added to the matrix material or pre-bonded to the diamond surface in the hope that they achieve chemical bonding to the diamond during sintering. However, in view of the process used for pre-metallizing the diamond surface, the ideal bonding force can be obtained only by heating the diamond surface for 1 hour at 600 ℃ under vacuum condition. According to the sintering conditions of the current common diamond-impregnated cutting tool, the diamond surface can not be metallized when the diamond is heated for about 5 minutes at the temperature of not more than 900 ℃ in non-vacuum or low vacuum. Since the atomic diffusion process is whether the active metal atoms (Ti, V, Cr, etc.) are concentrated on the diamond surface or the interface reaction reaches metallurgical bonding of the binder to the diamond, the process is extremely insufficient depending on the temperature used for hot pressing and the time taken for such a short time. Under solid phase sintering conditions (sometimes with small amounts of low strength low melting point metal or alloy liquid phase), the chemical or metallurgical bonding of the matrix to the diamond is very weak or does not form at all. Therefore, the improvement of the performance of the diamond grinding wheel by the technical route is very limited.
2. The brazing technology is used for manufacturing the diamond grinding wheel. The surface of diamond is plated with some transition elements (Ti, Cr, W, etc.) and reacts chemically to form carbide. Through the action of the carbide layer, the diamond, the bonding agent and the substrate can realize firm chemical metallurgical bonding through brazing, so that the real diamond surface metallization is realized, and the principle of diamond brazing is realized. As can be seen from the published patents and articles, the technique can make the maximum cutting edge value of diamond reach 2/3 of the grain diameter, and the tool life is improved by more than 3 times, and the value is less than 1/3 conventionally. Therefore, a strong bond between the matrix metal (brazing filler metal) and the matrix material-diamond and steel matrix is expected to be achieved using brazing techniques.
However, there are many difficulties to be solved urgently in diamond brazing: (1) the brazing material and the brazing process are selected to ensure the stability of the diamond so as to reduce or avoid the erosion of the brazing material to the diamond; (3) because the difference between the thermal expansion coefficients of the diamond and the metal matrix is large, the welding residual stress is also large, and the strength of the joint is reduced; (4) the melting point of the brazing filler metal is higher than the working temperature of the diamond tool, so that a metal (alloy) material with a lower melting point and a coefficient of expansion close to that of diamond is searched for as the brazing filler metal, and then certain active elements are considered to be added to improve the wettability and affinity of the diamond, so that the aims of bonding the diamond and meeting the mechanical property of a matrix are fulfilled. In addition, key technologies such as realization of diamond surface metallization, matching and selection of surface metal and brazing filler metal, selection of brazing flux and gas medium and the like need to be further matured and optimized. In addition, the efficiency and life of the diamond tool depend on the degree of firmness of the diamond abrasive grains embedded and also relate to the wear resistance of the matrix. The strength of the carcass, the distribution state of the diamonds in the carcass, the concentration of the diamonds and the like all affect the wear resistance of the carcass, so that how to make the carcass reach an ideal state is a problem which is worthy of attention in future work. Therefore, although the study of brazing technology began in the late 80's of the 20 th century, its application was limited to single layer tools due to the complexity of the work that remained in the experimental phase to date. The research of the domestic high-temperature brazing technology is started late, and compared with developed countries, the research breadth and depth are far from enough, so that the current progress is very slow, and large-scale production and application are not performed. In addition, this technical route also fails to solve the problem of the mounting direction of the diamond particles, and thus the optimum performance of the diamond particles cannot be sufficiently exhibited.
The documents cited in the introduction to the above background art are summarized below:
[1]Sung J C,Sung M.The brazing of diamond[J].International Journal ofRefractory Matals and Hard Materials,2009,27(2):382-393.
[2] from electroplating to brazing, the technology for manufacturing foreign single-layer superhard abrasive grinding wheels is newly developed [ J ] tool technology, 1998,32(8):4-8.
[3]Wang Y H,Zang J B,Wang M Z,et al.Properties and applications ofTi-coated diamond grits[J].Journal of Materials Processing Technology,2002,129(1-3):369-372.
[4] Songyeliqing, Xiaxihua, Ganchangyan, etc. research on the action mechanism of lanthanum, a rare earth element, in diamond tool matrix materials [ J ] rare metals, 1998,22(1):39-42.
[5] Dinglanying, Friedel, and Tephran, research on Ag-Cu-Ti/TiC composite solder brazing fine-grained diamond, report of artificial crystal, 2013,42(8):1510-1514.
[6] Xujiuhua, Juanjuan, Chenyan and the like, study of braze welding diamond set material drilling CFRP hole making, Nanjing university of aerospace, 2012,44(5):747-753.
[7] Development of diamond abrasive particles solder and soldering process thereof, agriculture and mechanics, 2005,36(7):140-143
[8] Xiaobing, Wuzhi bin, Xuhongjun, etc., research on silver-based brazing filler metal brazing single-layer diamond grinding wheels, diamond and abrasive tool engineering, 2001,121(1):4-7
[9]A.K.Chattopadhyay,L.Chollet and H.E.Hintermann.Induction brazingof diamond with Ni-Cr hardfacing alloy under argon atmosphere.Surface andCoating Technology,1990,45:293-298
[10] Yao Zhengjun, Xuhongjun, Xiaobing, etc., research on mechanism of Ni-Cr alloy brazing diamond grinding wheel, journal of agricultural machinery, 2001,32(4):96-98
[11] Development of single-layer high-temp. soldering diamond grinding wheel for dentistry, and grinding engineering of diamond and abrasive material (2002 (2): 34-35)
[12]F.A.Khalid,U.E.Klotz.On the interfacial nanostructure of brazeddiamond grits.Scripta
[13]T.Yamazaki,A.Suzumura.Relationship between X-ray diffraction andunidirectional solidification at interface between diamond and brazing fillermetal.Journal of Materials Science,2000,35:6144-6160
[14]J.T.Lower.Method of making monolayer abrasive tools.US,5492771,1996,2-20
[15] The interface structure and strength of copper-based solder welding diamond, namely inkstone, Zhengmingli, YaoDiming and the like, the welding academy 2012,33(7): 65-68.
Disclosure of Invention
In view of the disadvantages of the prior art, an object of the present invention is to provide a brazing grinding wheel having more excellent grinding workability and a method for manufacturing the same.
In order to achieve the above object, the present invention provides the following solutions:
a method for preparing a brazing grinding wheel based on hard alloy-diamond film particles as grinding materials is characterized by comprising the following steps:
1) preparing a diamond film on the end face of the hard alloy matrix to obtain an abrasive material; wherein the ratio of the thickness of the diamond film to the thickness of the hard alloy substrate is 1: 10-30;
2) mounting the grinding material on a mounting hole of the grinding wheel base body added with brazing filler metal, and brazing;
the abrasive is a cube with the side length of 2-5mm or a cylinder with the diameter and the height of 2-5 mm; the composite material is synthesized by WC particles and a Co binder through powder metallurgy;
the mounting holes are arranged on the side surface of the grinding wheel matrix in an array mode, and the depth of the holes is 1 mm.
Preferably, in the step 1), the grade of the hard alloy in the hard alloy matrix is YG6。
Preferably, in the step 2), the brazing filler metal is nickel-based alloy powder.
Preferably, in step 2), before the abrasive is installed, a binder is added to the installation hole in advance.
Preferably, the abrasive is a cube with a side length of 3mm or a cylinder with a diameter and a height of 3 mm.
Preferably, the brazing is carried out by a high-frequency welding machine, the brazing power is 7KW, the brazing time is 28s, the vacuum cooling is 1.5h, and the vacuum degree is 10 Pa.
Preferably, the material of the grinding wheel base body is 45-grade steel, the diameter is 100mm, the width is 6mm, and the central hole diameter is 20 mm.
Preferably, in the step 1), the diamond film is prepared by a chemical vapor deposition method in a hot-wire CVD apparatus.
Preferably, hydrogen and methane are used as raw material gases, and a diamond film is deposited on the hard alloy substrate after the hot wire is excited at the high temperature of 2000 ℃.
Preferably, the diamond particles used in depositing the diamond film have a particle size of 5 μm to 30 μm.
The method takes a formed hard alloy raw material as a substrate (a cylinder or a cuboid), adopts a chemical vapor deposition method to manufacture a hard alloy-diamond film particle abrasive material with high bonding strength on an end face, and adjusts the granularity and the thickness of a diamond film through a process and controls the appearance of a crystal face through the process. And then the diamond-hard alloy composite abrasive is arranged in a matrix mounting hole made of steel or alloy, and the diamond-hard alloy composite abrasive is firmly assembled on the metal matrix by brazing, so that the diamond film brazing grinding wheel of the hard alloy matrix is manufactured. Therefore, the whole falling of the grinding materials can not occur in the use of the diamond grinding wheel, the mounting direction of the diamond particles with the best processing efficiency can be ensured, and the processing efficiency and the service life of the diamond grinding wheel are greatly superior to those of the traditional diamond grinding wheel.
The invention has the beneficial effects that:
the grinding wheel prepared by the invention avoids the defect of low bonding strength between the diamond grinding material and the metal matrix caused by the fact that diamond particles do not form firm chemical bond bonding with the metal matrix in the traditional manufacturing technology, and simultaneously can ensure the mounting direction of the diamond particles with the best processing efficiency, and the processing efficiency and the service life of the grinding wheel are greatly superior to those of the traditional diamond grinding wheel.
Drawings
FIG. 1 is a schematic diagram of the outline dimensions of a grinding wheel base;
FIG. 2 is a schematic diagram of the outer circle shape and size of the grinding wheel matrix;
FIG. 3 is a schematic diagram of the arrangement of the grinding wheel matrix hole arrays;
FIG. 4 is a schematic view of a hot-wire CVD apparatus used in the present invention;
FIG. 5 is a schematic view of the shape of the carbide-diamond film particles;
FIG. 6 is a schematic representation of the shape of a carbide-diamond film grain;
FIG. 7 is a scanning electron micrograph of a diamond film;
fig. 8 and 9 are graphs showing grinding force Vs as a function of grinding force when different grinding wheels grind marble;
FIGS. 10 and 11 are graphs showing grinding force Vs as a function of grinding force Vs when different grinding wheels grind engineering plastics;
FIGS. 12 and 13 are graphs of grinding force Vs as a function of time for different wheels grinding aluminum alloys;
fig. 14 and 15 are graphs of grinding force Vs as a function of grinding force for different wheels grinding cemented carbide.
Detailed Description
The present invention is described in detail below by way of examples, and it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
Example 1
(1) Preparing a grinding wheel matrix:
the material is No. 45 steel, and the grinding wheel is processed into a shape with the diameter of 100mm, the width of 6mm and the central aperture of 20mm and used as a grinding wheel base body. As shown in fig. 1, an array of holes with a depth of 1.0mm is processed on the outer circular wall, and is used for installing the hard alloy-diamond film abrasive, as shown in fig. 2 and 3.
(2) Preparation of abrasives
The hard alloy is of the grade YG6 and is used for manufacturing a hard alloy abrasive matrix through powder metallurgy forming and small amount processing forming. And (3) preparing a diamond film on the surface of the end face of the hard alloy abrasive matrix by adopting a chemical vapor deposition method in a hot wire CVD device. The main structure of the hot wire CVD device is composed of a vacuum system, an air inlet system, a heating system, a sample loading and controlling system and the like, and is shown in figure 4. The whole reaction cavity, the pipeline and the like are pumped by a mechanical pump to reach a vacuum state, the gas inlet system is converged by 2 paths of stainless steel pipelines into one path and then enters the reaction cavity, and the flow is controlled by a gas flow controller; the heating system consists of an electrode, a hot wire and a power supply, wherein the power supply is a constant-power direct-current power supply, and the hot wire is heated to a set temperature through the electrode; the sample loading system is composed of a sample table, a lifting mechanism and a tool clamp. Hydrogen and methane are used as raw material gases, a diamond film is deposited on the hard alloy abrasive matrix after being excited by a hot wire with the high temperature of 2000 ℃, and the thickness, the grain size and the like of the diamond film are controlled by the process parameters such as the temperature of the hot wire, the temperature of the hard alloy abrasive matrix, the gas flow, the pressure, the deposition time and the like. The diamond film sample prepared on the end face of the hard alloy abrasive material base body is shown in figure 5, the appearance is shown in figure 6, and figure 7 is a micrograph of the diamond film.
(3) Mounting of
And respectively installing the prepared grinding materials in the installation holes of the grinding wheel matrix, wherein powder alloy brazing filler metal containing a binder is added into the installation holes in advance, and the brazing filler metal is nickel-based alloy powder. A high-frequency welder is adopted for brazing operation, the maximum power is 50KW, and the frequency is 30-80 KHz. The brazing process comprises the following steps: the brazing power is 7KW, the brazing time is 28s, the vacuum cooling is 1.5h, and the vacuum degree is 10 Pa.
The machining performance comparison experiment is carried out on marble, plastic, aluminum alloy and hard alloy on a universal grinding machine, and under the same machining condition, the normal force and the tangential force of the universal grinding machine are greatly smaller than those of a sintered diamond grinding wheel and an electroplated diamond grinding wheel. The service performance of the product is obviously superior to that of the traditional diamond grinding wheel.
The grinding is carried out on a universal tool grinder with variable frequency speed regulation. The grinding parameters were as set forth in table 1. The test adopts a fixed grinding mode and fixed grinding parameters, and the grinding force change characteristics of 4 different materials processed by the product of the patent, a sintered diamond grinding wheel and an electroplated diamond grinding wheel are compared to carry out the grinding performance comparison evaluation and the material adaptability evaluation of the hard alloy-diamond film brazing grinding wheel of the product of the patent.
Table 1 processing parameter settings
As can be seen from fig. 8 to 9, the three grinding wheels process 4 materials respectively, and the normal force and the tangential force are reduced along with the increase of the linear speed of the grinding wheel. When 4 materials are ground, the grinding force of the sintered diamond grinding wheel is obviously increased, the grinding force of the electroplated diamond grinding wheel is second, and the grinding force of the hard alloy-diamond film brazing grinding wheel is minimum. The patent is described as being optimized for abrasive machining performance of a variety of materials.
Claims (10)
1. A method for preparing a brazing grinding wheel based on hard alloy-diamond film particles as grinding materials is characterized by comprising the following steps:
1) preparing a diamond film on the end face of the hard alloy matrix to obtain an abrasive material; wherein the ratio of the thickness of the diamond film to the thickness of the hard alloy substrate is 1: 10-30;
2) mounting the grinding material on a mounting hole of the grinding wheel base body added with brazing filler metal, and brazing;
the abrasive is a cube with the side length of 2-5mm or a cylinder with the diameter and the height of 2-5 mm; the composite material is synthesized by WC particles and a Co binder through powder metallurgy;
the mounting holes are arranged on the side face of the grinding wheel base body in an array mode, and the hole depth is 1 mm.
2. The method according to claim 1, wherein in step 1), the cemented carbide grade in the cemented carbide matrix is YG6。
3. The production method according to claim 1, wherein in step 2), the brazing filler metal is nickel-based alloy powder; and/or, in the step 2), before the abrasive is installed, a bonding agent is added to the installation hole in advance.
4. The production method according to claim 3, wherein the abrasive is a cube having a side length of 3mm or a cylinder having a diameter and a height of 3 mm.
5. A method as set forth in claim 3, characterized in that the brazing is carried out by means of a high-frequency welder at a brazing power of 7KW for 28s, vacuum cooling for 1.5h and a vacuum of 10 Pa.
6. The method for preparing the grinding wheel base according to claim 1, wherein the material of the grinding wheel base is 45-gauge steel, the diameter of the grinding wheel base is 100mm, the width of the grinding wheel base is 6mm, and the central aperture of the grinding wheel base is 20 mm.
7. The production method according to claim 1, wherein the production of the diamond film in step 1) is carried out by a chemical vapor deposition method in a hot-wire CVD apparatus.
8. The preparation method according to claim 7, characterized in that hydrogen and methane are used as raw material gases, and a diamond film is deposited on the hard alloy substrate after being excited by a hot wire with a high temperature of 2000 ℃.
9. The production method according to claim 8, wherein the diamond particles used for the deposition of the diamond film have a particle size of 5 μm to 30 μm.
10. A brazed abrasive wheel produced by the production method according to any one of claims 1 to 9.
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| CN112638062A (en) * | 2021-03-10 | 2021-04-09 | 北京漠石科技有限公司 | Active brazing filler metal for ceramic circuit board |
| CN114274060A (en) * | 2021-11-23 | 2022-04-05 | 北京安泰钢研超硬材料制品有限责任公司 | Metal-based diamond tool bit for thinning high-end SiC chip, grinding wheel and manufacturing method of metal-based diamond tool bit |
| CN115401622A (en) * | 2022-07-13 | 2022-11-29 | 山东大学 | Preparation method of grinding ring for grinding wheel and grinding wheel |
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| CN112638062A (en) * | 2021-03-10 | 2021-04-09 | 北京漠石科技有限公司 | Active brazing filler metal for ceramic circuit board |
| CN114274060A (en) * | 2021-11-23 | 2022-04-05 | 北京安泰钢研超硬材料制品有限责任公司 | Metal-based diamond tool bit for thinning high-end SiC chip, grinding wheel and manufacturing method of metal-based diamond tool bit |
| CN114274060B (en) * | 2021-11-23 | 2023-12-01 | 北京安泰钢研超硬材料制品有限责任公司 | Metal-based diamond tool bit for thinning SiC chip, grinding wheel and manufacturing method of metal-based diamond tool bit |
| CN115401622A (en) * | 2022-07-13 | 2022-11-29 | 山东大学 | Preparation method of grinding ring for grinding wheel and grinding wheel |
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