Method for making vitreous bonded abrasive article and article m

Details Method for making vitreous bonded abrasive article and article m Method for making vitreous bonded abrasive article and article m

1992-01-23

1993-01-12

Dixon, Jr., William R.

Abrasive tool making process, material, or composition

Miscellaneous

51298, 51308, 51309, B24D 300

Patent

active

051786443

ABSTRACT:
A method for making vitreous bonded grinding wheels having a porosity of from 20 to 55% by volume is provided that reduces or prevent shrinkage. The method includes a step of mixing unclad, non-abrasive, non-metallic, particulate, inorganic solid shrinkage control agent with the abrasive grain, vitreous matrix precursor and other ingredients for producing the wheel. Non-abrasive hexagonal boron nitride is a preferred shrinkage control agent and may be used in amounts ranging for 1 to 10% by volume based on the volume of the grinding wheel. Reduced shrinkage of wheels made by the method over comparable wheels made without the shrinkage control agent is obtained.

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