Vitrified bonded abrasive tools

Details Vitrified bonded abrasive tools Vitrified bonded abrasive tools

B - Operations, Transporting

24

D

B24D 3/02 (2006.01) B24D 3/04 (2006.01) B24D 3/06 (2006.01) B24D 3/14 (2006.01) B24D 18/00 (2006.01)

Patent

CA 2402279

The present invention provides a vitrified-bonded abrasive tool wherein the abrasive grit portion comprises a thermally sensitive abrasive grain, such as sintered sol gel microcrystalline alpha alumina abrasive grain or superabrasive grain, and wherein the vitrified bond may be matured by firing at a temperature of about 700 to 1,100 °C. The invention preferably is carried out with sintered sol gel microcrystalline alpha alumina abrasive grain and a phosphorous oxide-containing, alkaliborosilicate vitrified bond composition. In one embodiment, during firing at about 700 to 1,100 °C, the vitrified bond of the invention comprises at least two immiscible, amorphous phases.

La présente invention concerne un outil abrasif collé-vitrifié dans lequel la partie à grain abrasif comprend un grain thermosensible, tel qu'un grain abrasif d'alumine alpha microcristalline à gel sol fritté ou un grain superabrasif, et dans lequel la liaison vitrifiée peut être achevée par cuisson à une température d'environ 700 à 1100 DEG C. Pour l'invention, on utilise de préférence un grain abrasif d'alumine alpha microcristalline à gel sol fritté et une composition de liaison vitrifiée d'alcaliborosilicate renfermant un oxyde de phosphore. Selon un mode de réalisation, pendant la cuisson feu à une température d'environ 700 à 1100 DEG C, la liaison vitrifiée selon l'invention comprend au moins deux phases amorphes non miscibles.

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