POROUS ABRASIVE ARTICLES WITH AGGLOMERATED ABRASIVES AND METHOD FOR MAKING THE AGGLOMERATED ABRASIIVES

摘要

The invention relates to an abrasive tool made of agglomerated abrasive grains and to processes for preparing the said agglomerated abrasive grains. According to the invention, the tool comprises: a. about 5...75% by volume sintered agglomerated material which contains a plurality of abrasive grains held with a binding material, the binding material being characterized by a melting temperature between about 500 and 1400° C, and the sintered agglomerated material having a three-dimensional shape and an initial size distribution; b. a binder; and c. about 35-80 % by volume total porosity, the porosity including at least 30% by volume interconnected porosity; wherein at least 50 % by weight of the sintered agglomerated material within the bonded abrasive tool retains a plurality of abrasive grains maintaining a three-dimensional shape after the manufacture of the tool.