RU96114978A - DIAMOND COATED TOOL AND METHOD FOR ITS MANUFACTURE - Google Patents

Claims (6)

1. A method of manufacturing a tool with a diamond coating having a cermet base, consisting essentially of solid granules and a metal binder, which carry out the firing of the cermet base for time, at temperature and in the atmosphere necessary to ensure the growth of granules on the surface of the base, characterized in that firing provides a surface roughness Ra, the specified inclined surface of the base more than 25 microinches, while reducing the concentration of the metal binder on the decree the surface, then the diamond coating is applied by vapor deposition onto the surface of the substrate, the diamond coating having an average adhesion to the surface of the substrate of more than 45 kg, which is determined by the Rockwell A peeling method.  2. A cutting tool with a diamond coating for machining materials with thin layer cutting, containing a cemented carbide base having tungsten carbide granules bonded together using a metal binder, the base having a working and inclined surface, and a cutting edge formed at the junction of the working and inclined surface, characterized in that the cemented carbide base has a surface with relatively large granules of tungsten carbide to ensure its irregular surface with a roughness Ra of more than 25 microinches, which is coated with a diamond coating having a strong adhesion to the surface, while relatively large tungsten carbide granules include granules having a size of at least 10 μm, and the diamond coating is adhesively bonded to the inclined and working surfaces .  3. A method of manufacturing an abrasive part of a diamond-coated tool having a ceramic-metal base bearing solid granules and a metal binder, in which the ceramic-metal base is fired, the firing atmosphere, its temperature and duration being selected from the condition for the growth of granules on the surface of the ceramic-metal base, different the fact that on the mentioned surface during the firing process provide a surface roughness (Ra) of more than 0.635 μm with a simultaneous decrease in the concentration of m metal binder on the specified surface, then carry out the adhesive deposition of the diamond coating by vapor deposition on the surface of the substrate with the adhesion force of the diamond coating with the surface of the substrate more than 45 kg, which is determined by the Rockwell method A.  4. The abrasive part of the tool with a diamond coating containing a cemented carbide base having tungsten carbide granules bonded together using a metal binder, characterized in that the base has an irregular surface on which relatively large tungsten carbide granules are coated with a roughness (Ra) more than 0.635 μm, a diamond coating is applied to the granules having a strong adhesion to the surface, while relatively large tungsten carbide granules include granules having a size p is at least 10 μm, and the diamond coating is adhesively bonded to said surface.  5. A method of manufacturing a diamond-coated tool having a cemented carbide base consisting of tungsten carbide granules and a metal binder selected from the group consisting of cobalt and cobalt alloys, in which the base is fired, while the firing atmosphere, its temperature and duration choose from the conditions for the growth of granules of tungsten carbide, characterized in that the basis of cemented carbide is taken with the working surface and adjacent to it and forming a cutting edge with it cu the inclined surface, and during the firing process, the roughness of the inclined surface (Ra) is more than 0.635 μm with a simultaneous decrease in the concentration of the metal binder on the specified surface, then the diamond coating is applied by vapor deposition onto the surface of the substrate with the adhesion of the diamond coating to the surface of the substrate more 45 kg, which is determined by the method of Rockwell A.  6. Cutting tool with a diamond coating for machining materials with thin layer cutting, containing a cemented carbide base having tungsten carbide granules bonded together using a metal binder selected from the group consisting of cobalt and cobalt alloys, characterized in that the base has a cutting edge formed at the junction of the working and inclined surfaces of the base and, to provide an irregular surface of the base, relatively large granules of tungsten carbide are placed on it with a roughness (Ra) of more than 0.635 μm, a diamond coating is applied to the granules having a strong adhesion to the surface, while relatively large tungsten carbide granules include granules having a size of at least 10 μm, and the diamond coating is adhesively bonded to an inclined and working surfaces.