| 摘要 |
High ratios of metal removed to abrasive tool wear are achieved when resin-bonded diamond or cubic boron nitride abrasive tools include in the bond from 10 to 60 percent by volume of silver, silver coated copper, or copper powder in the presence of from 5 to 30 percent by volume of a solid lubricant. Other fillers such as finely divided metal oxides or carbide such as silicon carbide may be present in an amount of from 0 to 40 percent by volume, depending upon the total content of metal and lubricant. The diamond wheels or tools of this invention are particularly suitable for the dry grinding of carbide tools. The cubic boron nitride wheels employ metal clad boron nitride abrasive particles and are particularly suitable for the dry grinding of hard steel tools, that is, high speed steels such as T15, M2, M3, and M4. Solid lubricants useful in this invention include organic polymers such as polytetrafluoroethylene, fluorinated ethylene polymers, chlorinated hydrocarbon, fluorinated ethylene propylene polyethylene styrene-butadiene, acrylonitrile-butadiene-styrene, polyurethane, polyforaldehyde, polycarbonate, and nylon and inorganic crystalline solids such as boron nitride, tungsten disulfide, graphite, metal coated graphite, molybdenum disulfide, niobium diselenide tungsten diselenide, and fluorinated graphite.
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