Bonded abrasives

Details Bonded abrasives Bonded abrasives

B - Operations, Transporting

24

D

57/15

B24D 3/04 (2006.01) B24D 3/00 (2006.01) B24D 3/34 (2006.01) C09K 3/14 (2006.01)

Patent

CA 1331838

ABSTRACT OF THE DISCLOSURE Bonded abrasive grinding tools with more cost effective grinding performance than those known in the prior art for grinding certain types of hard metals may be made by combining in the tool both grits of conventional superabrasives and grits of aluminous abrasive characterized by a microstructure that predominantly comprises tightly packed, very fine crystals of alpha alumina or of an aluminum spinel such as magnesium aluminate. The predominant crystallites in the best type of aluminous abrasive have maximum dimensions of no more than about 0.3 micron and generally show little or no regular faceting at about 5,000 magnification and are approximately equiaxed, with no higher aspect ration than 2, usually less than 1.5.

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