摘要:
A cutting tool comprising shank 28 and a cutting component 34 located in a recess in one end of the shank. The cutting component consists of an abrasive compact bonded to a cemented carbide support. Both the 5 rear surface 36 and the base surface 38 of the carbide support provide surfaces for brazing the component to the shank. The point 40 provides the cutting edge for the tool.
摘要:
A diamond abrasive body which comprises a coherent, skeletal diamond mass constituting at least 70 percent by volume of the body and a glass phase comprising up to 30 percent by volume of the body uniformly dispersed throughout the diamond mass. The glass phase has a melting point in the range 800 to 1400°C. The abrasive body has good thermal stability and strength making it suitable for use as an insert for tools such as dressing tools and surface set drill bits. The abrasive body is produced by infiltrating molten glass into a coherent skeletal diamond mass. The glass phase is preferably transformed to a ceramic form by heat treatment of the infiltrated diamond mass.
摘要:
An abrasive body (12) is provided which has high strength and an ability to withstand high temperatures making it suitable as a tool insert for dressing tools and surface set drill bits. The body comprises a mass of diamond particles present in an amount of 80 to 90 percent by volume of the body and a second phase present in an amount of 10 to 20 percent by volume of the body, the mass of diamond particles containing substantial diamond-to-diamond bonding to form a coherent skeletal mass and the second phase containing nickel and silicon, the nickel being in the form of nickel and/or nickel silicide and the silicon being in the form of silicon, silicon carbide and/or nickel silicide. The abrasive bodies are made under conditions of elevated temperature and pressure suitable for diamond compact manufacture.
摘要:
In a method of removing second phase from an abrasive compact, the invention provides the improvement of forming a slot or hole in the compact prior to or during the removal step. The compact is typically a diamond compact having a cobalt second phase which may be removed by leaching.
摘要:
A coating composition for applying to human nails which has a liquid base, generally including a resin, solvent and colloidal silica, having suspended therein fine abrasive particles such as diamond particles. The liquid base must be a Bingham plastic having a yield stress of not less than 0,2 Pa.
摘要:
A wire-drawing die blank comprising a diamond or cubic boron nitride abrasive compact, a mass of metal bonded carbide surrounding the compact and providing it with symmetrical support and a metal layer bonding the carbide mass to the abrasive compact, the metal of the bonding layer being tantalum or an alloy containing tantalum. The blank is converted into a wire-drawing die composite by providing the compact with a centrally located hole extending therethrough.
摘要:
A composite diamond compact is provided which has a diamond compact (12) bonded to a cemented carbide substrate (10). The composite diamond compact is characterised by the second phase for the diamond compact (12) and the binder for the cemented carbide substrate (10) both being a nickel/cobalt alloy.