A Diamond Surface Activation Process Based on Brazing
A technology of surface activation and diamond tools, which is applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve problems that have not yet been patented in research, and achieve the effects of expanding the application range, improving bonding performance, and increasing activity
Inactive Publication Date: 2016-06-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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[0044] Please refer to Figure 1 to Figure 3As shown, the principle of the diamond surface activation process based on the brazing method of the present invention is to add a protective material that has no substantial chemical reaction with the diamond in the activated metal that reacts with the diamond, and by controlling the composition, particle size, density and protection of the activated metal added The particle size and density of the material are used to precisely control the activation state of the diamond surface. In order to achieve precise control effect, the shape of the surface activated metal powder is characterized as spherical or nearly spherical, such as figure 1 shown. The surface of the diamond is wrapped in a single layer, which means that the bonding of activated metal particles on the surface of the diamond is a single layer. The added protection material is a metal material which does not react chemically with the diamond, and its melting temperature...
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Abstract
The invention discloses a brazing method-based diamond surface activation technology, which comprises the following steps: determining a diamond activation index according to the requirement on preparation of a diamond tool; calculating out the number of single-layer activation metal particles required to be arranged on the surface of an average single diamond; according to the requirement on preparation of the diamond tool, calculating the activation metal preparation mass of the average single diamond; determining the average particle size of the activation metal particles; calculating the mass of a single diamond protective material; cleaning the surface of the diamonds; pouring the prepared activation metal, the protective material and the diamonds into a container, adding binder, and wrapping the surface of the diamonds through the granulating process; placing the prepared particles in accordance with the requirements on a quartz plate or on a ceramic plate, and putting into a vacuum brazing furnace for vacuum brazing. Through the design and calculation, the surface activation effect of the diamonds is accurately determined and controlled, the preparation technology is simple, the quality is stable, controlling is easy, the process can be standardized, and the brazing method-based diamond surface activation technology is suitable for industrialized mass production.
Description
Technical field: [0001] The invention relates to a diamond surface activation process based on brazing, which is widely used in the fields of preparing brazing diamond tools, electroplating diamonds, and sintering diamond tools. Background technique: [0002] Diamond is the hardest known material and consists of pure carbon. Diamond has stable chemical properties, acid and alkali resistance, does not react with concentrated hydrofluoric acid, hydrochloric acid, nitric acid at high temperature, only in the melt of sodium carbonate, sodium nitrate, potassium nitrate, or with potassium dichromate and sulfuric acid When boiling the mixture together, the surface will be slightly oxidized; it will corrode in the high temperature gas of oxygen, carbon monoxide, carbon dioxide, hydrogen, chlorine and methane. Because diamond is hard and stable, it has many important industrial uses, such as fine abrasive materials, high-hard cutting tools, various drill bits, and wire drawing dies....
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IPC IPC(8): B23K1/00
CPCB23K1/008B23K1/206
Inventor 肖冰王波张子煜段端志邵明嘉季冬明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS