CN114012089B - Preparation method and generation device of diamond coated ball - Google Patents
Preparation method and generation device of diamond coated ball Download PDFInfo
- Publication number
- CN114012089B CN114012089B CN202011123917.2A CN202011123917A CN114012089B CN 114012089 B CN114012089 B CN 114012089B CN 202011123917 A CN202011123917 A CN 202011123917A CN 114012089 B CN114012089 B CN 114012089B
- Authority
- CN
- China
- Prior art keywords
- diamond
- metal powder
- cavity
- coated ball
- ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- 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
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention relates to a preparation method and a generation device of a diamond coated ball. The method comprises the steps of sucking diamond by using a diamond adsorption probe with vacuum negative pressure, extending the diamond into the center of a cavity of a wrapping ball, closing the cavity of the wrapping ball, extruding metal powder mixed slurry from openings on two sides of the cavity of the wrapping ball until the whole cavity is filled by a metal powder slurry extrusion device, then withdrawing the adsorption probe, and separating the cavities to form the diamond wrapping ball. The generating device comprises a metal powder slurry extrusion device, a coated ball cavity, a vacuum negative pressure device, a diamond adsorption probe and diamond. The diamond package pellets prepared by the generating device have consistent particle size, form diamond-like arrangement, effectively avoid diamond agglomeration or segregation in the matrix formed by the diamond-metal powder layer, and improve the performance of the diamond-metal composite material.
Description
Technical Field
The invention belongs to the field of research of diamond-metal matrix composite materials, and particularly relates to a preparation method and a generation device of a diamond coated ball.
Background
The conventional diamond tool cutting, drilling and grinding product or diamond functional material product is prepared by mixing and sintering diamond and metal powder, wherein the diamond is randomly distributed in a metal powder matrix or the diamond is mixed in the metal matrix powder in an unordered way. Because the granularity and specific gravity of diamond and metal matrix powder are very different, diamond is difficult to be uniformly mixed in the metal matrix powder, and randomly distributed diamond is easy to agglomerate and segregate, so that the performance of a diamond product is greatly influenced, and the diamond tool for cutting, drilling and grinding has low drilling efficiency, short service life and instability; and the performances of the diamond functional material product such as photo-electric heating and the like are low. In order to prevent diamond segregation in the metal matrix powder, zinc stearate, liquid paraffin, absolute ethyl alcohol or the like is added during mixing, but the problem of uneven distribution of diamond in the metal matrix powder cannot be fundamentally solved.
In view of the above problems, korean new korean company, 2004 invented the ARIX technology, i.e., a method of preparing a diamond ordering tool by pressing holes in a metal powder cold compact by means of a device pointer and then dropping the same into the diamond, has achieved great success. The use of a fluidized bed to coat particles is described in publication nos. US4770907A, US5143523a and US5405573a, et al. A method for coating particles such as diamond using a turntable method is described in publication EP0012631 A1. The patent publication No. US20120082786A1 combines the above-mentioned two coating techniques of "fluidization" and "rotation disc" to achieve uniform coating of ultra-hard particles in a single device as described, with great improvements in coating efficiency and cost reduction, but the method requires continuous coating state inspection during the coating process.
The above-mentioned "fluidization method" and "rotating disk method" are both ball-rolling processes, and although the phenomenon of agglomeration, segregation, etc. of diamond can be avoided, the particle size of the obtained diamond-coated ball has a certain deviation, and complete and uniform arrangement cannot be realized. The ARIX technology of the new Korean company is that diamonds are orderly arranged in advance, and the problems of pressure or uneven density of a metal matrix during sintering cause slippage of the diamonds, so that deviation of design occurs, and the performance of diamond tools or products is reduced.
Disclosure of Invention
The invention provides a preparation method of an advanced diamond-metal powder composite material, and particularly relates to a preparation method and a generation device of a diamond coated ball. The diamond coated ball prepared by the invention is characterized in that a metal powder layer is attached to the surface of bare diamond and used as a matrix material, and other metal powder is not added during final sintering, namely, the metal powder layer on the surface is the matrix binding material of the diamond tool, and the process can prevent the phenomena of diamond segregation, agglomeration and the like in the matrix, and the diamond is basically uniformly distributed in the matrix. The preparation method comprises the following steps:
under the action of the vacuum negative pressure device 4, the suction force in the negative pressure process is 5-8N, and the diamond 6 is sucked by the diamond suction probe 5 and stretches into the center of the wrapping ball cavity 3 to close the wrapping ball cavity. The metal powder mixed slurry is extruded into the whole cavity from the openings on two sides of the wrapping ball cavity 3 through the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2 until the whole cavity is filled, then the diamond adsorption probe 5 is withdrawn from the wrapping ball cavity 3, and at the moment, the diamond and the metal powder layer inside the wrapping ball cavity 3 form a diamond wrapping ball. The ball-wrapping cavity 3 is opened, and the diamond-wrapping ball is formed and falls into the container. And putting the diamond coated ball into a heat treatment furnace for dewaxing treatment, so that the organic binder is removed completely. The dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering without adding other metal powder.
The diamond particle size in the above step is 75 to 1180 μm, preferably, the diamond particle size is 150 μm, 600 μm and 1000 μm; the volume fraction of the diamond is 5-50%, and the diamond is determined according to the proportion of the diamond in the diamond and metal powder layer; wherein, when the grain diameter of the diamond is 150 mu m, the volume fraction of the diamond is 5 percent; when the grain diameter of the diamond is 600 mu m, the volume fraction of the diamond is 20%; when the diamond particle size is 1000 μm, the volume fraction of diamond is 40%.
The metal powder layer is formed by mixing a plurality of metal powders, and comprises Fe, co, cu and Sn, and further comprises Ni, mn or W. The mass ratio of the components and the mass ratio of the various metal powder is Fe to Co to Cu to Sn=40 to 20 to 35 to 5.
The dewaxing temperature in the dewaxing process is 300-550 ℃, the heat preservation time is 3-4h, preferably the dewaxing temperature is 450 ℃, and the heat preservation time is 4h. The dewaxed diamond coated ball is sintered in a graphite mold or steel die at 850-950 deg.c for 3-5min, preferably 890 deg.c for 3min.
Meanwhile, in order to prepare the metal powder layer into a viscous paste slurry with certain fluidity, the invention also uses an organic binder, wherein the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol, and the proportion of the polyformaldehyde, the polypropylene and the ethylene glycol is 10:70:30, and the organic binder is calculated according to the volume fraction. The metal powder layer and the organic binder are mixed and stirred to prepare a metal powder mixed slurry in a viscous paste form, and then put into the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2.
The diamond coated ball prepared based on the preparation method of the diamond coated ball consists of diamond and a metal powder layer coated on the surface of the diamond. Meanwhile, the invention also provides a generating device of the diamond coated ball, which comprises a first metal powder slurry extrusion device 1, a second metal powder slurry extrusion device 2, a coated ball cavity 3, a vacuum negative pressure device 4, a diamond adsorption probe 5 and diamonds 6, wherein the coated ball cavity 3 is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the small holes are respectively connected with the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2; the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe 5; the upper end of the diamond adsorption probe 5 is connected with the wrapping ball cavity 3, the probe can extend into the central position inside the cavity, and the lower end of the probe is connected with the vacuum negative pressure device 4, so that the diamond 6 is adsorbed on the diamond adsorption probe 5.
Compared with the prior art, the invention has the beneficial effects that:
1) The diamond coated balls prepared by the generating device have consistent diamond coated ball particle sizes, form diamond-like arrangement, and can realize even distribution of diamond in the metal powder layer.
2) The cavities of the coated balls with different diameters can be designed according to actual needs, so that the preparation of diamond coated balls with different particle sizes is realized.
3) The preparation process of the diamond coated ball has high efficiency and can realize large-scale production.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a device for generating the diamond coated ball, a 1-first metal powder slurry extrusion device, a 2-second metal powder slurry extrusion device, a 3-coated ball cavity, a 4-vacuum negative pressure device, a 5-diamond adsorption probe and 6-diamond.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
In the embodiment of the invention, the diamond coated ball is prepared by selecting the metal powder layer and diamond with the particle size of 150 mu m. The metal powder layer is formed by mixing a plurality of metal powders, including Fe, co, cu and Sn.
In the embodiment, the components and mass ratio of the various metal powder are Fe, co, cu, sn=40:20:35:5, and the diamond is calculated according to the volume fraction of 5%, so that the diameter of the cavity of the coated ball is 407 mu m.
Referring to fig. 1, the device for generating the diamond coated ball comprises a first metal powder slurry extrusion device 1, a second metal powder slurry extrusion device 2, a coated ball cavity 3, a vacuum negative pressure device 4, a diamond adsorption probe 5 and diamond 6, wherein the coated ball cavity 3 is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the small holes are respectively connected with the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2; the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe 5; the upper end of the diamond adsorption probe 5 is connected with the wrapping ball cavity 3, the probe can extend into the central position inside the cavity, and the lower end of the probe is connected with the vacuum negative pressure device 4, so that the diamond 6 is adsorbed on the diamond adsorption probe 5.
In order to prepare the metal powder into a viscous paste slurry with certain fluidity, an organic binder is used in the embodiment of the invention, wherein the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol, and the proportion of the polyformaldehyde, the polypropylene and the ethylene glycol is 10:70:30 (volume fraction). The metal powder and the organic binder are mixed and stirred to prepare a viscous paste slurry, and then put into the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2.
Under the action of the vacuum negative pressure device 4, the suction force in the negative pressure process is 6N, and the diamond 6 is sucked by the diamond suction probe 5 and stretches into the center of the wrapping ball cavity 3 to close the wrapping ball cavity. The metal powder mixed slurry is extruded into the whole cavity from the openings at two sides of the wrapping ball cavity 3 through the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2 until the whole cavity is filled, then the diamond adsorption probe 5 is withdrawn from the wrapping ball cavity 3, and at the moment, the diamond and the metal powder mixed slurry inside the wrapping ball cavity 3 form a diamond wrapping ball. And then the cavity 3 of the wrapping ball is opened, and the diamond wrapping ball is formed and falls into the container. And putting the diamond coated ball into a heat treatment furnace for dewaxing treatment, wherein the dewaxing temperature is 450 ℃, and the heat preservation time is 4 hours. The dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering, the sintering temperature is 890 ℃, the sintering time is 3min, and other metal powder is not required to be added.
Example 2
In the embodiment of the invention, the diamond coated ball is prepared by selecting the diamond with the granularity of 600 mu m from the metal powder layer. The metal powder layer is formed by mixing a plurality of metal powders, including Fe, co, cu and Sn.
In the embodiment, the components and mass ratio of the various metal powder are Fe, co, cu, sn=40:20:35:5, and the diameter of the cavity of the coated ball can be designed to be 1020 mu m according to the volume fraction of 20%.
Referring to fig. 1, the device for generating the diamond coated ball comprises a first metal powder slurry extrusion device 1, a second metal powder slurry extrusion device 2, a coated ball cavity 3, a vacuum negative pressure device 4, a diamond adsorption probe 5 and diamond 6, wherein the coated ball cavity 3 is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the small holes are respectively connected with the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2; the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe 5; the upper end of the diamond adsorption probe 5 is connected with the wrapping ball cavity 3, the probe can extend into the central position inside the cavity, and the lower end of the probe is connected with the vacuum negative pressure device 4, so that the diamond 6 is adsorbed on the diamond adsorption probe 5.
In order to prepare the metal powder into a viscous paste slurry with certain fluidity, an organic binder is used in the embodiment of the invention, wherein the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol, and the proportion of the polyformaldehyde, the polypropylene and the ethylene glycol is 10:70:30 (volume fraction). The metal powder and the organic binder are mixed and stirred to prepare a viscous paste slurry, and then put into the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2.
Under the action of the vacuum negative pressure device 4, the suction force in the negative pressure process is 6N, and the diamond 6 is sucked by the diamond suction probe 5 and stretches into the center of the wrapping ball cavity 3 to close the wrapping ball cavity. The metal powder mixed slurry is extruded into the whole cavity from the openings at two sides of the wrapping ball cavity 3 through the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2 until the whole cavity is filled, then the diamond adsorption probe 5 is withdrawn from the wrapping ball cavity 3, and at the moment, the diamond and the metal powder mixed slurry inside the wrapping ball cavity 3 form a diamond wrapping ball. And then the cavity 3 of the wrapping ball is opened, and the diamond wrapping ball is formed and falls into the container. And putting the diamond coated ball into a heat treatment furnace for dewaxing treatment, wherein the dewaxing temperature is 450 ℃, and the heat preservation time is 4 hours. The dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering, the sintering temperature is 890 ℃, the sintering time is 3min, and other metal powder is not required to be added.
Example 3
In the embodiment of the invention, the diamond coated ball is prepared by selecting the metal powder layer and diamond with the granularity of 1000 mu m. The metal powder layer is formed by mixing a plurality of metal powders, including Fe, co, cu and Sn.
In the embodiment, the components and mass ratio of the various metal powder are Fe, co, cu, sn=40:20:35:5, and the diameter of the cavity of the coated ball can be designed to be 1250 mu m according to the volume fraction of 40%.
Referring to fig. 1, the device for generating the diamond coated ball comprises a first metal powder slurry extrusion device 1, a second metal powder slurry extrusion device 2, a coated ball cavity 3, a vacuum negative pressure device 4, a diamond adsorption probe 5 and diamond 6, wherein the coated ball cavity 3 is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the small holes are respectively connected with the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2; the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe 5; the upper end of the diamond adsorption probe 5 is connected with the wrapping ball cavity 3, the probe can extend into the central position inside the cavity, and the lower end of the probe is connected with the vacuum negative pressure device 4, so that the diamond 6 is adsorbed on the diamond adsorption probe 5.
In order to prepare the metal powder into a viscous paste slurry with certain fluidity, an organic binder is used in the embodiment of the invention, wherein the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol, and the proportion of the polyformaldehyde, the polypropylene and the ethylene glycol is 10:70:30 (volume fraction). The metal powder and the organic binder are mixed and stirred to prepare a viscous paste slurry, and then put into the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2.
Under the action of the vacuum negative pressure device 4, the suction force in the negative pressure process is 6N, and the diamond 6 is sucked by the diamond suction probe 5 and stretches into the center of the wrapping ball cavity 3 to close the wrapping ball cavity. The metal powder mixed slurry is extruded into the whole cavity from the openings at two sides of the wrapping ball cavity 3 through the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2 until the whole cavity is filled, then the diamond adsorption probe 5 is withdrawn from the wrapping ball cavity 3, and at the moment, the diamond and the metal powder mixed slurry inside the wrapping ball cavity 3 form a diamond wrapping ball. And then the cavity 3 of the wrapping ball is opened, and the diamond wrapping ball is formed and falls into the container. And putting the diamond coated ball into a heat treatment furnace for dewaxing treatment, wherein the dewaxing temperature is 450 ℃, and the heat preservation time is 4 hours. The dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering, the sintering temperature is 890 ℃, the sintering time is 3min, and other metal powder is not required to be added.
Example 4
In the embodiment of the invention, the diamond coated ball is prepared by selecting the metal powder layer and diamond with the particle size of 75 mu m. The metal powder layer is formed by mixing a plurality of metal powders, including Fe, co, cu and Sn.
In the embodiment, the components and mass ratio of the various metal powder are Fe, co, cu, sn=40:20:35:5, and the diamond is calculated according to the volume fraction of 5%, so that the diameter of the cavity of the coated ball is 225 mu m.
Referring to fig. 1, the device for generating the diamond coated ball comprises a first metal powder slurry extrusion device 1, a second metal powder slurry extrusion device 2, a coated ball cavity 3, a vacuum negative pressure device 4, a diamond adsorption probe 5 and diamond 6, wherein the coated ball cavity 3 is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the small holes are respectively connected with the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2; the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe 5; the upper end of the diamond adsorption probe 5 is connected with the wrapping ball cavity 3, the probe can extend into the central position inside the cavity, and the lower end of the probe is connected with the vacuum negative pressure device 4, so that the diamond 6 is adsorbed on the diamond adsorption probe 5.
In order to prepare the metal powder into a viscous paste slurry with certain fluidity, an organic binder is used in the embodiment of the invention, wherein the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol, and the proportion of the polyformaldehyde, the polypropylene and the ethylene glycol is 10:70:30. The metal powder and the organic binder are mixed and stirred to prepare a viscous paste slurry, and then put into the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2.
Under the action of the vacuum negative pressure device 4, the suction force in the negative pressure process is 6N, and the diamond 6 is sucked by the diamond suction probe 5 and stretches into the center of the wrapping ball cavity 3 to close the wrapping ball cavity. The metal powder mixed slurry is extruded into the whole cavity from the openings at two sides of the wrapping ball cavity 3 through the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2 until the whole cavity is filled, then the diamond adsorption probe 5 is withdrawn from the wrapping ball cavity 3, and at the moment, the diamond and the metal powder mixed slurry inside the wrapping ball cavity 3 form a diamond wrapping ball. And then the cavity 3 of the wrapping ball is opened, and the diamond wrapping ball is formed and falls into the container. And putting the diamond coated ball into a heat treatment furnace for dewaxing treatment, wherein the dewaxing temperature is 450 ℃, and the heat preservation time is 4 hours. The dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering, the sintering temperature is 890 ℃, the sintering time is 3min, and other metal powder is not required to be added.
Example 5
In the embodiment of the invention, the diamond coated ball is prepared by selecting the metal powder layer and diamond with the grain diameter of 1180 mu m. The metal powder layer is formed by mixing a plurality of metal powders, including Fe, co, cu and Sn.
In the embodiment, the components and mass ratio of the various metal powder are Fe, co, cu, sn=40:20:35:5, and the diamond is calculated according to the volume fraction of 48%, so that the diameter of the cavity of the coated ball is 1310 mu m.
Referring to fig. 1, the device for generating the diamond coated ball comprises a first metal powder slurry extrusion device 1, a second metal powder slurry extrusion device 2, a coated ball cavity 3, a vacuum negative pressure device 4, a diamond adsorption probe 5 and diamond 6, wherein the coated ball cavity 3 is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the small holes are respectively connected with the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2; the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe 5; the upper end of the diamond adsorption probe 5 is connected with the wrapping ball cavity 3, the probe can extend into the central position inside the cavity, and the lower end of the probe is connected with the vacuum negative pressure device 4, so that the diamond 6 is adsorbed on the diamond adsorption probe 5.
In order to prepare the metal powder into a viscous paste slurry with certain fluidity, an organic binder is used in the embodiment of the invention, wherein the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol, and the proportion of the polyformaldehyde, the polypropylene and the ethylene glycol is 10:70:30 (volume fraction). The metal powder and the organic binder are mixed and stirred to prepare a viscous paste slurry, and then put into the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2.
Under the action of the vacuum negative pressure device 4, the suction force in the negative pressure process is 6N, and the diamond 6 is sucked by the diamond suction probe 5 and stretches into the center of the wrapping ball cavity 3 to be closed. The metal powder mixed slurry is extruded into the whole cavity from the openings at two sides of the wrapping ball cavity 3 through the first metal powder slurry extrusion device 1 and the second metal powder slurry extrusion device 2 until the whole cavity is filled, then the diamond adsorption probe 5 is withdrawn from the wrapping ball cavity 3, and at the moment, the diamond and the metal powder mixed slurry inside the wrapping ball cavity 3 form a diamond wrapping ball. And then the cavity 3 of the wrapping ball is opened, and the diamond wrapping ball is formed and falls into the container. And putting the diamond coated ball into a heat treatment furnace for dewaxing treatment, wherein the dewaxing temperature is 450 ℃, and the heat preservation time is 4 hours. The dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering, the sintering temperature is 890 ℃, the sintering time is 3min, and other metal powder is not required to be added.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (15)
1. A preparation method of a diamond coated ball is characterized in that,
under the action of a vacuum negative pressure device (4), the diamond adsorption probe (5) absorbs the diamond (6) and stretches the diamond into the center of the wrapping ball cavity (3), and the wrapping ball cavity (3) is closed;
extruding the metal powder mixed slurry into the whole cavity from the openings at the two sides of the wrapping ball cavity (3) through the first metal powder slurry extruding device (1) and the second metal powder slurry extruding device (2);
and withdrawing the diamond adsorption probe (5), opening the cavity, and forming a diamond wrapping ball by wrapping the diamond and the metal powder layer in the ball cavity (3) and falling into the container.
2. The method for preparing the diamond-coated ball according to claim 1, wherein,
the metal powder mixed slurry is a thick paste slurry prepared by mixing and stirring a metal powder layer and an organic binder.
3. The method for preparing the diamond-coated ball according to claim 2, wherein,
the organic binder is a mixed jelly formed by stirring polyformaldehyde, polypropylene and ethylene glycol;
the ratio of the polyoxymethylene to the polypropylene to the ethylene glycol is 10:70:30.
4. The method for preparing the diamond-coated ball according to claim 2, wherein,
the metal powder layer is formed by mixing a plurality of metal powders;
the plurality of metal powders includes Fe, co, cu, and Sn.
5. The method for preparing the diamond-coated ball according to claim 4, wherein,
the components and mass ratio of the metal powder are Fe to Co to Cu to Sn=40 to 20 to 35 to 5.
6. The method for preparing the diamond-coated ball according to claim 1, wherein,
the grain diameter of the diamond is 75-1180 mu m;
the volume fraction of the diamond in the diamond coated ball is 5-50%.
7. The method for preparing the diamond-coated ball according to claim 6, wherein,
the diamond particle sizes were 150 μm, 600 μm and 1000. Mu.m.
8. The method for preparing the diamond-coated ball according to claim 7, wherein,
wherein when the grain diameter of the diamond is 150 mu m, the volume fraction of the diamond is 5%; when the grain diameter of the diamond is 600 mu m, the volume fraction of the diamond is 20%; when the diamond particle size is 1000 μm, the volume fraction of diamond is 40%.
9. The method for preparing the diamond-coated ball according to claim 1, wherein,
the diamond coated ball is placed into a heat treatment furnace for dewaxing treatment, the dewaxing temperature is 300-550 ℃, and the heat preservation time is 3-4h.
10. The method for preparing the diamond-coated ball according to claim 9, wherein,
the dewaxing temperature is 450 ℃, and the heat preservation time is 4 hours.
11. The method for preparing the diamond-coated ball according to claim 9, wherein,
the dewaxed diamond coated ball is directly put into a graphite mould or a steel mould for sintering without adding other metal powder.
12. The method for preparing the diamond-coated ball according to claim 11, wherein,
the sintering temperature of the dewaxed diamond coated ball in a graphite mould or steel mould is 850-950 ℃ and the sintering time is 3-5min.
13. The method for preparing the diamond-coated ball according to claim 12, wherein,
the sintering temperature is 890 ℃, and the sintering time is 3min.
14. A diamond coated ball generating device for realizing the method for preparing the diamond coated ball according to any one of claims 1 to 13; it is characterized in that the method comprises the steps of,
the generating device comprises a first metal powder slurry extrusion device (1), a second metal powder slurry extrusion device (2), a coated ball cavity (3), a vacuum negative pressure device (4), a diamond adsorption probe (5) and diamond (6);
the wrapping ball cavity (3) is a hollow hemisphere and is divided into two hemispheres from the middle, one side of each hemisphere is provided with a small hole, and the two hemispheres are respectively connected with the first metal powder slurry extrusion device (1) and the second metal powder slurry extrusion device (2); the openings of the combining positions of the two hemispheres are connected with a diamond adsorption probe (5); the upper end of the diamond adsorption probe (5) is connected with the wrapping ball cavity (3), the probe can extend into the central position in the cavity, and the lower end of the probe is connected with the vacuum negative pressure device (4) so that the diamond (6) is adsorbed on the diamond adsorption probe (5).
15. A diamond coated ball prepared by the method of preparing a diamond coated ball according to any one of claims 1-13, wherein,
the diamond coated ball consists of diamond and a metal powder layer coated on the surface of the diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011123917.2A CN114012089B (en) | 2020-10-20 | 2020-10-20 | Preparation method and generation device of diamond coated ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011123917.2A CN114012089B (en) | 2020-10-20 | 2020-10-20 | Preparation method and generation device of diamond coated ball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114012089A CN114012089A (en) | 2022-02-08 |
| CN114012089B true CN114012089B (en) | 2023-10-10 |
Family
ID=80053845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011123917.2A Active CN114012089B (en) | 2020-10-20 | 2020-10-20 | Preparation method and generation device of diamond coated ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114012089B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3650714A (en) * | 1969-03-04 | 1972-03-21 | Permattach Diamond Tool Corp | A method of coating diamond particles with metal |
| JPH08289811A (en) * | 1995-04-21 | 1996-11-05 | Pilot Corp:The | Hollow ornamental body and its production |
| US6238280B1 (en) * | 1998-09-28 | 2001-05-29 | Hilti Aktiengesellschaft | Abrasive cutter containing diamond particles and a method for producing the cutter |
| EP1894983A1 (en) * | 2006-09-01 | 2008-03-05 | Cedric Sheridan | Granules for use in abrading or cutting tools production |
| CN102009175A (en) * | 2010-10-08 | 2011-04-13 | 李亚东 | Manufacturing method of multilayer shell-core composite structural part |
| CN103361580A (en) * | 2012-03-23 | 2013-10-23 | 美铝公司 | Composite products and related methods |
| CN103600314A (en) * | 2013-11-26 | 2014-02-26 | 北京安泰钢研超硬材料制品有限责任公司 | Device and method for coating powder on surfaces of superhard particles |
| CN105451916A (en) * | 2014-05-13 | 2016-03-30 | 犹他大学研究基金会 | Production of substantially spherical metal powers |
| CN105798290A (en) * | 2016-04-15 | 2016-07-27 | 无锡钻探工具厂有限公司 | Method for evenly distributing diamond in matrix through diamond pelletizing |
| CN110523971A (en) * | 2019-09-12 | 2019-12-03 | 厦门高时实业有限公司 | A kind of method and diamond tool preparing diamond tool using vacuum pre-sintering |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008025838A1 (en) * | 2006-09-01 | 2008-03-06 | Cedric Sheridan | Intermediate product for use in the production of abrading or cutting tools |
| US9567506B2 (en) * | 2007-07-23 | 2017-02-14 | Element Six Limited | Method for manufacturing encapsulated superhard material |
-
2020
- 2020-10-20 CN CN202011123917.2A patent/CN114012089B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3650714A (en) * | 1969-03-04 | 1972-03-21 | Permattach Diamond Tool Corp | A method of coating diamond particles with metal |
| JPH08289811A (en) * | 1995-04-21 | 1996-11-05 | Pilot Corp:The | Hollow ornamental body and its production |
| US6238280B1 (en) * | 1998-09-28 | 2001-05-29 | Hilti Aktiengesellschaft | Abrasive cutter containing diamond particles and a method for producing the cutter |
| EP1894983A1 (en) * | 2006-09-01 | 2008-03-05 | Cedric Sheridan | Granules for use in abrading or cutting tools production |
| CN102009175A (en) * | 2010-10-08 | 2011-04-13 | 李亚东 | Manufacturing method of multilayer shell-core composite structural part |
| CN103361580A (en) * | 2012-03-23 | 2013-10-23 | 美铝公司 | Composite products and related methods |
| CN103600314A (en) * | 2013-11-26 | 2014-02-26 | 北京安泰钢研超硬材料制品有限责任公司 | Device and method for coating powder on surfaces of superhard particles |
| CN105451916A (en) * | 2014-05-13 | 2016-03-30 | 犹他大学研究基金会 | Production of substantially spherical metal powers |
| CN105798290A (en) * | 2016-04-15 | 2016-07-27 | 无锡钻探工具厂有限公司 | Method for evenly distributing diamond in matrix through diamond pelletizing |
| CN110523971A (en) * | 2019-09-12 | 2019-12-03 | 厦门高时实业有限公司 | A kind of method and diamond tool preparing diamond tool using vacuum pre-sintering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114012089A (en) | 2022-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7585366B2 (en) | High pressure superabrasive particle synthesis | |
| US3316073A (en) | Process for making metal bonded diamond tools employing spherical pellets of metallic powder-coated diamond grits | |
| US7404857B2 (en) | Superabrasive particle synthesis with controlled placement of crystalline seeds | |
| CN101517102B (en) | Dual stage process for the rapid formation of pellets | |
| CN1066744A (en) | Hot-pressed magnets in open-air presses | |
| JPH0579735B2 (en) | ||
| KR102330132B1 (en) | Methods of making polycrystalline diamond bodies having annular zones with different characteristics | |
| US6814928B2 (en) | Method of making sintered articles | |
| CN114012089B (en) | Preparation method and generation device of diamond coated ball | |
| EP1894983A1 (en) | Granules for use in abrading or cutting tools production | |
| JP5170390B2 (en) | Iron-based mixed powder for powder metallurgy | |
| CN115351290A (en) | Method for preparing metal ceramic parts with complex shapes based on spherical feeding printing | |
| CN100436065C (en) | Method for treatment of binding agent for super hard abrasive tools | |
| US9321150B2 (en) | Aggregate abrasives for abrading or cutting tools production | |
| JP5952279B2 (en) | Low specific heat composite material for thermal cycler | |
| CN101910354A (en) | Method for manufacturing encapsulated superhard material | |
| CN105127416B (en) | A kind of FGM powder stratiform distribution device and method | |
| WO2008025836A1 (en) | Granules for use in abrading or cutting tools production | |
| CN208772458U (en) | A kind of fine-granularity diamond is uniformly distributed saw blade tip | |
| CN109834605A (en) | The sintering grinding wheel and its processing method of silica sol gelcasting | |
| JP3924959B2 (en) | Method for forming amorphous alloy powder | |
| KR101255615B1 (en) | Method for Manufacturing a Segment for Diamond Tool and a Diamond Tool Having the Segment | |
| CN205057047U (en) | Mixed feedway of metallurgical powder | |
| CN114851096B (en) | Glass fiber metal composite bonding agent superhard abrasive grinding wheel and preparation method thereof | |
| CN203712531U (en) | Device for coating surfaces of ultrahard particles with powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |