ABRASIVE ARTICLE (VERSIONS) Russian patent published in 2015 - IPC B24D3/18 B24D3/26 

FIELD: chemistry.

SUBSTANCE: invention relates to abrasive articles on a binder, suitable for high-speed grinding. An abrasive article comprises an abrasive body on a binder with abrasive particles which contain microcrystalline alumina (MCA) enclosed in a binding material. In the abrasive body on the binder, the pore volume is at least about 42 vol % of the total volume of the abrasive body on the binder. The abrasive body on the binder is capable of polishing a metal-containing workpiece at a rate of at least about 60 m/s with material removal rate of at least about 0.4 in³/min/in (258 mm³/min/mm). In another version, the binding material contains not more than 20 wt % boron oxide (B₂O₃), wherein the ratio of the percentage content by weight of silicon dioxide (SiO₂) to the percentage content by weight of aluminium oxide (Al₂O₃) is not more than about 3.2, where in the abrasive body on the binder the pore volume is at least about 42 vol. % of the total volume of the abrasive body on the binder, and the abrasive body on the binder is capable of polishing a metal-containing workpiece at a rate of at least about 60 m/s, with a cutting depth of at least about 0.003 in (0.076 mm).

EFFECT: improved operational properties of abrasive articles on a binder for high-speed polishing.

14 cl, 3 tbl, 11 dwg, 5 ex