Abrasive bodies
OwnerWilliam I. Wilsoninventor
Life of this patent
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Abstract
A laminated abrasive body which is in effect a thick compact comprising a plurality of diamond or cubic boron nitride compacts laminated together, joining of adjacent compacts taking place by means of a layer of a metal or metal alloy braze and the thickness of the laminate exceeding 5 mm and the longest dimension of the body transverse to the thickness exceeding 2 mm. The invention also covers methods of making such laminated bodies by forming alternate layers of braze and compact or compact-forming material and then forming the laminate under elevated temperature and pressure.
Claims21
A laminated abrasive body comprising a plurality of abrasive compacts joined together to form a laminate;
- each compact comprising a mass of diamond or cubic boron nitride abrasive particles or a mixture thereof, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate;
- the adjacent compacts being joined by means of a layer of a metal or metal alloy braze;
- the thickness of the laminate exceeding 5 mm and the longest dimension of the body transverse to the thickness exceeding 2 mm.
A method of producing a laminated abrasive body comprising a plurality of abrasive compacts joined together to form a laminate, each compact comprising a mass of diamond or cubic boron nitride abrasive particles or a mixture thereof, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate, said method including the steps of forming alternate layers of compact and a metal or metal alloy braze, in powder or foil form, and heat treating said layers to cause adjacent compacts to join together, the heat treatment taking place under elevated conditions of temperature and pressure at which the abrasive particles of the compacts are crystallographically stable.
A method of producing a laminated abrasive body comprising a plurality of abrasive compacts joined together to form a laminate, each compact comprising a mass of diamond or cubic boron nitride abrasive particles or a mixture thereof, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate, said method including the steps of forming alternate layers of diamond or cubic boron nitride compact-forming material and a metal or metal alloy braze of melting point exceeding 1450.degree. C., in powder or foil form, subjecting said layers to elevated conditions of temperature and pressure suitable to form a compact of the compact-forming material, reducing the temperature, releasing the pressure and recovering the abrasive body.
Dependencies are inferred from the claim text.