Abrasive tool making process – material – or composition – With inorganic material
Reexamination Certificate
2006-10-17
2006-10-17
Marcheschi, Michael (Department: 1755)
Abrasive tool making process, material, or composition
With inorganic material
C051S308000, C051S309000, C051S293000, C501S103000, C501S105000, C264S005000
Reexamination Certificate
active
07122064
ABSTRACT:
An Al2O3and ZrO2based abrasive grain containing titanium compounds in a reduced form, especially in the form of oxides and/or suboxides and/or carbides and/or oxycarbides and/or oxycarbonitrides and/or suicides, corresponding to a proportion of 0.510 wt. %, expressed as TiO2, containing 20–50 wt. % ZrO2, wherein more than 75 wt. % of the ZrO2is present in a tetragonal crystal form, having an overall carbon content of 0.03–0.5 wt. %, a proportion of impurities caused by raw materials of less than 3.0 wt. %, wherein the rare earth content calculated in the form of oxides is less than 0.1 wt. %, having an Si-compound content of 0.05–1.0 wt. %, expressed as SiO2, and an Al2O3content of 50–80 wt. %, obtained by melting a mixture required for a corresponding abrasive grain composition, said mixture corresponding to Al2O3, ZrO2, TiO2and TiO2, and/or raw materials containing the latter in the presence of a surplus of a reducing agent and quenched in such a way that the melt is fully solidified in less than 10 seconds. The invention also relates to a method for the production thereof and the use thereof in abrasives.
REFERENCES:
patent: 3891408 (1975-06-01), Rowse et al.
patent: 5143522 (1992-09-01), Gibson et al.
patent: 5525135 (1996-06-01), Moltgen et al.
Bucar Wolfgang
Dazza Alessandro
Moeltgen Paul
Zeiringer Hans
Connolly Bove Lodg & Hutz, LLP
Marcheschi Michael
Treibacher Schleifmittel GmbH
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