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CN-122007422-A - CBN ultrathin scribing of metal ceramic bonding agent and preparation method thereof

CN122007422ACN 122007422 ACN122007422 ACN 122007422ACN-122007422-A

Abstract

The invention provides a cBN ultrathin scribing of a metal ceramic bonding agent and a preparation method thereof, wherein the cBN ultrathin scribing is prepared from a mixture and a binder, the volume ratio of the mixture to the binder is (3-4): (4~3), the mixture comprises, in terms of volume fraction, 10% -25% of cBN single crystal powder, 20% -40% of ceramic powder and the balance of metal powder, the sum of the volume fractions of the components is 100%, the metal powder comprises one or more of Cu, sn, ti, ni, fe and Co, and the ceramic powder comprises one or more of SiC, al 2 O 3 , tiN, tiC and TiB 2 . According to the invention, the cBN single crystal powder is used as a basic abrasive, and the metal phase and the ceramic phase are used as composite bonding agents, so that the metal phase ensures the strength and the wear resistance of the cBN ultrathin scribing, the ceramic phase enhances the self-sharpening property, the service life of the obtained cBN ultrathin scribing is prolonged, and the grinding performance is further enhanced.

Inventors

  • JIN XIN
  • WEI HONGCHAO
  • SONG HAITAO
  • NIE CHAO

Assignees

  • 中煤科工西安研究院(集团)有限公司

Dates

Publication Date
20260512
Application Date
20260122

Claims (8)

  1. 1. The cBN ultrathin scribing of the metal ceramic bonding agent is characterized by being prepared from a mixture and a binder, wherein the volume ratio of the mixture to the binder is (3-4): (4~3); The mixture comprises, by volume, 10% -25% of cBN single crystal powder, 20% -40% of ceramic powder and the balance of metal powder, wherein the sum of the volume fractions of the components is 100%; The metal powder comprises Cu, sn, ti, ni, fe and one or more than one of Co; The ceramic powder comprises one or more of SiC, al 2 O 3 , tiN, tiC and TiB 2 .
  2. 2. A cBN ultra-thin dicing of a cermet binder type according to claim 1, wherein the particle size of the cBN single crystal powder is 100 to 400 mesh, the particle size of the metal powder is 200 to 800 mesh, and the particle size of the ceramic powder is 400 to 1600 mesh.
  3. 3. The ultrathin cBN dicing of claim 1, wherein the binder is prepared from 10-30% by mass of polypropylene, 1-3% by mass of dioctyl phthalate, 3-5% by mass of stearic acid, 2-5% by mass of polyethylenimine, and the balance of styrene-butadiene-styrene block copolymer, wherein the sum of the mass fractions of the components is 100%.
  4. 4. A method of producing cBN ultra-thin dicing of a cermet binder form according to any one of claims 1 to 3, comprising in particular the steps of: step one, banburying: weighing cBN monocrystal powder, metal powder and ceramic powder, mixing with a binder to obtain a banburying raw material, regulating the banburying temperature of an internal mixer to 170-210 ℃, adding the banburying raw material when the temperature is raised to the banburying temperature, starting timing, and carrying out banburying for 40-120 min to obtain a banburying raw material; granulating and wire drawing: Granulating the banburying raw materials obtained in the step one in a granulator, sorting the prepared granules by a screen, and selecting fine granules with the granularity of 4 meshes for wiredrawing to obtain wiredrawing granules; printing a green body: Establishing a 3D model of the cBN ultra-thin scribing of the metal ceramic bonding agent in a computer, setting printing parameters for the 3D model, then introducing the printing parameters into a 3D printer, taking the silk-like printing material obtained in the step two as the printing material of the 3D printer, starting the 3D printer and printing to obtain a green body of the cBN ultra-thin scribing of the metal ceramic bonding agent; Step four, de-binding agent: placing the green body obtained in the step three into a degreasing die, removing the binder in the green body obtained in the step three by adopting a degreasing furnace in a stepped heating and heat preservation mode, and then cooling along with the furnace to obtain a green body after binder removal; step five, sintering: and (3) placing the green body obtained in the step (IV) after the binder removal into a sintering die, sintering by adopting a sintering furnace, cooling along with the furnace after the sintering is finished, and finally obtaining the cBN ultrathin scribing of the metal ceramic binding agent.
  5. 5. The method for producing cBN ultra-thin dicing of cermet joining agent type as defined in claim 4, wherein in the second step, the working temperature of the wire drawing machine is set to 170 ℃ to 210 ℃; in the second step, the diameter of the silk-like printing material is 1.7-2.0 mm.
  6. 6. The method for preparing the cBN ultra-thin dicing of the cermet bonding agent type according to claim 4, wherein in the third step, the printing parameters are specifically that the thickness of the printing layer is 0.05-0.4 mm, the temperature of the nozzle is 200-250 ℃, and the temperature of the platform is 80-110 ℃.
  7. 7. The method for preparing cBN ultra-thin dicing of cermet binder type as defined in claim 4, wherein in step four, the binder removal process is performed by adopting a step-wise heating and heat-preserving manner in a degreasing furnace with hydrogen gas; The step-type heating and heat preservation method comprises the specific steps of heating from room temperature to 170-230 ℃ for 20-60 min, heating from 170-230 ℃ to 260-320 ℃ for 90-150 min, heating from 260-320 ℃ to 340-380 ℃ for 50-120 min, heating from 340-380 ℃ to 400-440 ℃ for 30-60 min, heating from 400-440 ℃ for 15-60 min, heating from 400-440 ℃ to 500-550 ℃ for 70-120 min and heating from 500-550 ℃ for 1-2 h.
  8. 8. The method for producing cBN ultra-thin dicing of a cermet binder type according to claim 4, wherein in step five, the protective atmosphere in the sintering furnace at the time of sintering is hydrogen; in the fifth step, the sintering pressure during sintering is 20 MPa-60 MPa; And fifthly, the sintering temperature and the heat preservation time during sintering are that the temperature is raised to 480-530 ℃ from room temperature, the heating time is 1-10 min, the heat preservation is carried out for 1-5 min at 480-530 ℃, the temperature is raised to 680-820 ℃ from 480-530 ℃, the heating time is 1-10 min, and the heat preservation is carried out for 1-10 min at 680-820 ℃.

Description

CBN ultrathin scribing of metal ceramic bonding agent and preparation method thereof Technical Field The invention belongs to the technical field of powder metallurgy and additive manufacturing, relates to cBN ultra-thin scribing, and in particular relates to a metal ceramic bonding type cBN ultra-thin scribing and a preparation method. Background With the development of scientific technology, the cBN (cubic boron carbide) ultrathin scribing has very wide application prospect in the aspect of electronic circuit board and metal material processing, however, the cBN ultrathin scribing in the current market cannot meet the current increasingly high industry requirements, the rotating speed of the cBN ultrathin scribing is very high when the cBN ultrathin scribing works, and can often reach 30000rpm or higher, the cBN ultrathin scribing can be divided into ceramic type, resin type and metal type according to the types of bonding agents, wherein the ceramic type cBN ultrathin scribing has lower strength and is difficult to bear ultrahigh rotating speed, and is often disintegrated at the rotating speed of 15000rpm, while the metal type cBN ultrathin scribing has poor self-sharpening property, the resin type cBN ultrathin scribing has lower service life and is easy to soften at high temperature. In addition, the existing method for preparing the cBN ultra-thin scribing still has the major defects that a relatively thick grinding wheel is prepared firstly by a most common sintering method and then thinned to a corresponding thickness by a thinning process, the method has large raw material waste and low efficiency, the prepared grinding wheel is easy to have the problem of uneven cloth and affects the product quality, and the cBN ultra-thin scribing prepared by an electroplating method has weak holding force on the cBN single crystal powder grinding material and the electroplating liquid pollutes the environment. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a cBN ultra-thin dicing and a preparation method of a metal ceramic bonding agent type, which solve the technical problem that the dicing performance of the cBN ultra-thin dicing in the prior art needs to be further improved. In order to solve the technical problems, the invention is realized by adopting the following technical scheme. The metal ceramic bonding type cBN ultrathin scribing is prepared from a mixture and a binder, wherein the volume ratio of the mixture to the binder is (3-4) (4~3). The mixture comprises, by volume, 10% -25% of cBN single crystal powder, 20% -40% of ceramic powder and the balance of metal powder, wherein the sum of the volume fractions of the components is 100%. The metal powder comprises Cu, sn, ti, ni, fe and one or more than one of Co. The ceramic powder comprises one or more of SiC, al 2O3, tiN, tiC and TiB 2. The invention also has the following technical characteristics. Specifically, the granularity of the cBN single crystal powder is 100-400 meshes, the granularity of the metal powder is 200-800 meshes, and the granularity of the ceramic powder is 400-1600 meshes. The adhesive is prepared from the following components, by mass, 10-30% of polypropylene, 1-3% of dioctyl phthalate, 3-5% of stearic acid, 2-5% of polyethyleneimine and the balance of a styrene-butadiene-styrene block copolymer, wherein the sum of the components is 100%. The invention also provides a preparation method of the cBN ultrathin scribing of the metal ceramic bonding agent, which specifically comprises the following steps: step one, banburying: And (3) weighing cBN single crystal powder, metal powder and ceramic powder, mixing with a binder to obtain a banburying raw material, regulating the banburying temperature of an internal mixer to 170-210 ℃, adding the banburying raw material when the temperature is raised to the banburying temperature, starting timing, and carrying out banburying for 40-120 min to obtain the banburying raw material. Granulating and wire drawing: And (3) granulating the banburying raw materials obtained in the step (A) in a granulator, sorting the prepared granules by a screen, selecting fine granules with the granularity of 4 meshes for wiredrawing to obtain wiredrawing granules, and adding the wiredrawing granules into a wiredrawing machine for wiredrawing to obtain the wiredrawing printing material. Printing a green body: and (3) establishing a 3D model of the cBN ultra-thin scribing of the metal ceramic bonding agent in a computer, setting printing parameters for the 3D model, then introducing the 3D model into a 3D printer, taking the silk-like printing material obtained in the step (II) as the printing material of the 3D printer, starting the 3D printer and printing to obtain the green compact of the cBN ultra-thin scribing of the metal ceramic bonding agent. Step four, de-binding agent: And (3) placing the green body obtained in the step (III) into a degreasing die,