| 摘要 |
PROBLEM TO BE SOLVED: To provide a super-finishing grinding wheel of relatively low cost and excellent grinding performance. SOLUTION: In a super-finishing grinding wheel in which alumina-based abrasive grains are bound by vitrified binding agent, the alumina-based abrasive grains include fine crystal sintered alumina-based abrasive grains, and the vitrified binding agent contains P2O5 by 3-15 wt.%, preferably. The fine crystal sintered alumina-based abrasive grains are manufactured by a chemical process started from unclear species of aluminum oxide of sub-micro grain to become abrasive trains through drying, crushing and sintering processed, so thousands of millions of high purity particulartes exist in a single piece of abrasive grains. While ordinary abrasive grains are easy to be abraded by polishing, the fine crystal sintered alumina-based abrasive grains continuously has excellent cutting effect because new sub-micron grains continuously comes out. This is because the fine crystal sintered abrasive grains themselves form a relief angle when crushed.
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