Bonded abrasive article

B - Operations – Transporting – 24 – D

Patent

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Details

B24D 3/14 (2006.01) B24D 3/04 (2006.01) B24D 3/06 (2006.01)

Patent

CA 2745874

A bonded abrasive article in-cludes, on a total weight basis: 30 to 37 per-cent of ceramic-coated blue fused aluminum oxide particles; 30 to 37 percent of non-seeded sol-gel alumina-based abrasive particles, wherein the non-seeded sol-gel alumina-based abrasive particles are composed of crystallites of alpha alumina, magnesium alumina spinel, and rare earth hexagonal aluminate; a phenolic binder that comprises a reaction product of 8 to 12 percent by weight of curable novolac phenolic resin and 2.1 to 5.1 percent by weight of curable resole phenolic resin; 3 to 6 percent by weight of metal fibers having a length of 5 millimeters or less; 8 to 11 percent by weight of cryolite; and 0.1 to 0.3 percent by weight of electrically conductive particles. Methods of making and using the bonded abrasive article are also disclosed.

L'article abrasif lié ci-décrit comprend, rapporté au poids total : 30 à 37 % de particules d'oxyde d'aluminium fondues à bleu enrobées de céramique ; 30 à 37 % de particules abrasives à base d'alumine obtenues par un procédé sol-gel sans ensemencement, qui se composent de cristallites d'alumine alpha, de spinelle magnésium-alumine et d'aluminate hexagonal de terre rare ; et un liant phénolique qui comprend un produit de réaction de 8 à 12 % en poids d'une résine phénolique durcissable de type novolaque et 2,1 à 5,1 % en poids d'une résine phénolique durcissable de type résol, 3 à 6 % en poids de fibres métalliques d'une longueur de 5 mm ou moins, 8 à 11 % en poids de cryolite, et 0,1 à 0,3 % en poids de particules électriquement conductrices. L'invention concerne également des procédés de fabrication et d'utilisation de l'article abrasif lié.

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