A method for preparing diamond tools by vacuum pre-sintering and diamond tools
A diamond tool and pre-sintering technology, which is used in metal processing equipment, transportation and packaging, coating, etc. Cavity wear and other issues
Active Publication Date: 2021-11-09
XIAMEN GAOSHI IND CO LTD
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Problems solved by technology
[0002] In the manufacturing process of diamond tools, diamonds are wrapped in metal binders and sintered to make diamond tools. Under the current technical conditions, due to the high chemical stability of diamonds, it is not easy to form a bond with the binder. Chemical bonding leads to low holding force of the matrix metal to the diamond, and the diamond is easy to fall off. The current diamond utilization rate is only 40-50%.
The excellent metal bond uses expensive cobalt, although it can improve the holding force of diamond, but the expensive cobalt makes the manufacturer lose its market competitiveness
[0003] Traditional diamond tool matrix metal powder and diamond particles are mixed by directly granulating the matrix metal powder and diamond particles into a mixing tank for mixing and granulation. In this way, the diamond particles are not wrapped and directly mixed with the matrix metal powder for granulation. There is an uneven distribution of diamond particles in the matrix alloy blank after cold pressing, which will cause localized diamond particle agglomeration and localized diamond particle dispersion.
The uneven dispersion of diamond particles in the diamond tool matrix will have a great impact on the actual cutting efficiency and service life of the diamond tool, and the cutting effect of each diamond particle on the stone cannot be fully utilized, resulting in slower cutting speed. , the service life of the tool is shortened, and it is prone to tool deviation
In addition, although there is a preparation process for wrapping diamond particles in the prior art, because the wrapping strength of the matrix metal powder around the prepared diamond particles is not high, the diamond particles are easily exposed to the cavity of the cold-press and hot-press molds. contact, resulting in serious wear and tear on the mold cavity of the cold pressing mold and the hot pressing graphite mold, reducing the service life of the cold pressing and hot pressing molds
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[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0024] Such as figure 1 Shown, a kind of method adopting vacuum pre-sintering to prepare diamond tool, it comprises the following contents:
[0025] Step a, preparing 8kg of matrix metal powder, wherein the mass components of the matrix metal powder are: 5600g of Fe70Cu30 powder, 480g of CuSn15 powder, 800g of Cu powder, 720g of Ni powder, and 400g of WC powder.
[0026] Step b, preparing gel coat alloy powder, taking out 400g of metal matrix powder from the matrix metal powder prepared in step a as extraction matrix powder, then adding 40g of Mo powder and 40g of Cr powder to the extraction matrix powder, Then put the mixture into a mixing tank and stir and mix for 1 hour to obtain gel coat alloy powder.
[0027] Step c, prepare diamond wrapping material, get 255g diamond particle, it is made of ...
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The invention relates to the field of diamond cutting tools, in particular to a method for preparing diamond tools by vacuum pre-sintering and a diamond tool. The diamond encapsulation and granulation in the diamond tool includes from the inside to the outside: diamond particles, an alloy carbide transition layer and metal powder layer, the distribution of diamond particles is more uniform, it is wrapped more firmly and is not easy to be exposed or fallen off, avoiding the wear of the mold cavity, and the service life of the mold is longer; because the easily carbonized colloidal alloy powder is pre-distributed on the surface of the diamond particles, it is easy to bond with the diamond particles A carbonization reaction occurs on the surface to form an alloy carbonization transition layer, which improves the holding force of the metal powder layer on the diamond particles, and gives full play to the cutting effect of each diamond particle when cutting stone. The service life of diamond tools for cutting stone is increased by 10‑20%. The speed is increased by 15‑25%, and the distribution uniformity of diamond particles is greatly improved. When cutting large stones, the knife will not go sideways.
Description
technical field [0001] The invention relates to the field of diamond cutting tools, in particular to a method for preparing diamond tools by vacuum pre-sintering and the diamond tools. Background technique [0002] In the manufacturing process of diamond tools, diamonds are wrapped in metal binders and sintered to make diamond tools. Under the current technical conditions, due to the high chemical stability of diamonds, it is not easy to form a bond with the binder. The chemical combination leads to low holding force of the matrix metal to the diamond, and the diamond is easy to fall off. The current utilization rate of the diamond is only 40-50%. An excellent metal bond uses expensive cobalt. Although it can improve the holding power of diamonds, the expensive cobalt makes the manufacturer lose its market competitiveness. [0003] Traditional diamond tool matrix metal powder and diamond particles are mixed by directly granulating the matrix metal powder and diamond particl...
Claims
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IPC IPC(8): B22F1/02B22F3/02B22F3/10C22C26/00
CPCB22F3/02C22C26/00B22F3/1007B22F2998/10B22F2998/00B22F1/17B22F2201/20
Inventor 高忠麟
Owner XIAMEN GAOSHI IND CO LTD