# US 9,873,184 B2 · Abrasive wheels and methods for making and using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,873,184 B2 - Document ID: US9873184B2 - Status: Granted - Kind: B2 - Application number: 14/418,301 - Filed: 2013-07-29 - Published: 2015-07-02 - Granted: 2018-01-23 - Earliest claimed: 2012-07-31 - Assignees: Saint-Gobain Abrasives, Inc.; Saint-Gobain Abrasifs - Applicants: Saint-Gobain Abrasives, Inc.; Saint-Gobain Abrasifs - Inventors: Dashi Nie; Shenglan Huang; Gaoxiang Gou - Web page: https://patentgrep.com/patent/US9873184B2 ## CPC - B24D 5/123: {having different cutting segments} - B24D 3/28: Resins {or natural or synthetic macromolecular compounds (B24D3/22 takes precedence)} - B24D 5/12: Cut-off wheels - B24D 18/0009: {using moulds or presses} - C09C 1/407: {Aluminium oxides or hydroxides} - C09K 3/1409: {Abrasive particles per se (preparation of diamond C01B32/25)} - C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram - C01P 2004/03: obtained by SEM - C01P 2004/54: Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension - C01P 2006/10: Solid density - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) - C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS ## Abstract A cutting wheel includes a body having a bond material. The bond material comprises at least about 31 vol % of a total volume of the body. Additionally, the body includes abrasive particles contained within the bond material. The abrasive particles include a first type of abrasive particle including black alumina with at least about 10 vol % of a total volume of the abrasive particles including black alumina. In some instances the cutting wheel can include a chop saw, while in other situations, the cutting wheel can include a cut-off wheel. ## Claims ### Claim 1 A cutting wheel comprising: a body including: a bond material comprising at least about 31 vol % of a total volume of the body; abrasive particles contained within the bond material, the abrasive particles including a first type of abrasive particle including black alumina, wherein at least about 25 vol % of a total volume of the abrasive particles includes black alumina, and wherein the abrasive particles include a second type of abrasive particle selected from the group consisting of brown fused alumina, white fused alumina and zirconia. ### Claim 2 A cutting wheel comprising: a body including: about 35 vol % to about 45 vol % bond material for a total volume of the body; and abrasive particles contained within the bond material, wherein the abrasive particles include black alumina and brown fused alumina with a content of the black alumina abrasive particles for the total volume of the body being greater than a content of the brown fused alumina abrasive particles for the total volume of the body. ### Claim 3 A cutting wheel comprising: a body including: about 35 vol % to about 45 vol % bond material for a total volume of the body, the bond material comprising about 28 vol % to about 36 vol % of a phenolic resin material for the total volume of the body and about 5 vol % to about 12 vol % of a pyrite material for the total volume of the body; about 40 vol % to about 50 vol % abrasive particles for the total volume of the body, the abrasive particles comprising about 28 vol % to about 36 vol % black alumina abrasive particles for the total volume of the body and about 9 vol % to about 18 vol % brown fused alumina abrasive particles for the total volume of the body; and about 8 vol % to about 19 vol % porosity for the total volume of the body. ### Claim 4 (depends on 1) The cutting wheel of claim 1, wherein at least about 30 vol % of the total volume of the abrasive particles includes black alumina. ### Claim 5 (depends on 1) The cutting wheel of claim 1, wherein an average particle size of the first type of abrasive particle is at least about 0.34 mm and not greater than about 1.16 mm. ### Claim 6 (depends on 1) The cutting wheel of claim 1, wherein the abrasive particles consist essentially of a mixture of black alumina and brown fused alumina. ### Claim 7 (depends on 1) The cutting wheel of claim 1, wherein at least about 38 wt % of a total weight of the abrasive particles includes the first type of abrasive particle, and no greater than about 81 wt % of a total weight of the abrasive particles includes the first type of abrasive particle. ### Claim 8 (depends on 1) The cutting wheel of claim 1, wherein the first type of abrasive particle has a density of no greater than about 3.9 g/cm3, and at least about 3.0 g/cm3. ### Claim 9 (depends on 1) The cutting wheel of claim 1, wherein the black alumina includes an alpha alumina phase within a range of about 68 vol % to about 92 vol % of a total volume of the black alumina. ### Claim 10 (depends on 1) The cutting wheel of claim 1, wherein the black alumina includes a (Fe, Al, Si)O4 phase within a range of about 12 vol % to about 16 vol % of a total volume of the black alumina. ### Claim 11 (depends on 1) The cutting wheel of claim 1, wherein the black alumina includes a FeTiO3 phase within a range of about 4 vol % to about 8 vol % of a total volume of the black alumina. ### Claim 12 (depends on 1) The cutting wheel of claim 1, wherein the black alumina comprises Al2O3 within a range of about 60 vol % to about 76 vol % of a total volume of the black alumina, Fe2O3 within a range of about 7 vol % to about 17 vol % of a total volume of the black alumina, SiO2 within a range of about 10 vol % to about 20 vol % of a total volume of the black alumina, and TiO2 within a range of about 2 vol % to about 4 vol % of a total volume of the black alumina. ### Claim 13 (depends on 1) The cutting wheel of claim 1, wherein the body comprises: 31-33 vol % bond material for a total volume of the body; 7-8.2 vol % of a pyrite material for a total volume of the body; 6-25 vol % porosity for a total volume of the body; 28-32 vol % brown fused alumina for a total volume of abrasive particles; and 68-72 vol % black alumina for a total volume of abrasive particles. ### Claim 14 (depends on 1) The cutting wheel of claim 1, wherein the body comprises: 33-36 vol % bond material for a total volume of the body; 8.3-9 vol % of a pyrite material for a total volume of the body; 6-25 vol % porosity for a total volume of the body; 28-32 vol % brown fused alumina for a total volume of abrasive particles; and 68-72 vol % black alumina for a total volume of abrasive particles. ### Claim 15 (depends on 1) The cutting wheel of claim 1, wherein the body comprises: 36-38 vol % bond material for a total volume of the body; 9-10 vol % of a pyrite material for a total volume of the body; 6-25 vol % porosity for a total volume of the body; 28-32 vol % brown fused alumina for a total volume of abrasive particles; and 68-72 vol % black alumina for a total volume of abrasive particles. ### Claim 16 (depends on 1) The cutting wheel of claim 1, wherein the body comprises 14-25 vol % porosity for a total volume of the body. ### Claim 17 (depends on 2) The cutting wheel of claim 2, wherein the body comprises 6-10 vol % of a pyrite material for a total volume of the body. ### Claim 18 (depends on 2) The cutting wheel of claim 2, wherein the body comprises 14-25 vol % porosity for a total volume of the body. ### Claim 19 (depends on 2) The cutting wheel of claim 2, wherein the body comprises 28-32 vol % brown fused alumina for a total volume of abrasive particles. ### Claim 20 (depends on 2) The cutting wheel of claim 2, wherein the body comprises 68-72 vol % black alumina for a total volume of abrasive particles.