Vitrified abrasive bodies
AssigneeNorton Company
InventorRounan Li
Life of this patent
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Abstract
Improved hot-pressed vitrified bodies are described, which comprise an abrasive material, a vitreous bond; and at least one extender agent. The extender agent may be formed of hollow ceramic bodies such as glass or mullite spheres, alone or in combination with a non-reactive material such as graphite. An improved method for preparing vitrified abrasive wheels is also described.
Claims20
A hot-pressed, vitrified abrasive body having total porosity in the range of about 1% to about 50%, based on volume, said body comprising:
- (a) an abrasive material;
- (b) a vitreous bond;
- and
- (c) an extender agent selected from the group consisting of:
- (I) hollow ceramic bodies ((c)(I));
- and
- (II) a combination of (c)(I) with at least one nonreactive material having a low coefficient of friction, which is not hollow.
A hot-pressed, vitrified abrasive body having total porosity in the range of about 1% to about 50%, based on volume percent, said body comprising:
- (a) a superabrasive material;
- (b) a vitreous bond;
- and
- (c) an extender agent combination comprising:
- (i) hollow ceramic bodies of mullite or glass;
- and
- (ii) a non-hollow material selected from the group consisting of graphite, hexagonal boron nitride, molybdenum disulfide, and mixtures thereof.
A method of preparing a vitrified abrasive body, comprising the steps of:
- (a) combining an abrasive material, a vitreous bond, and an extender agent selected from the group consisting of:
- (I) hollow ceramic bodies;
- and
- (II) a combination of I with at least one nonreactive material having a low coefficient of friction, which is not hollow, to form a mixture;
- and then
- (b) thermally treating the mixture by a hot pressing technique.
Dependencies are inferred from the claim text.