| 摘要 |
PURPOSE:To provide possibility of sustaining severe service condition by fusion metallizing an exposed surface of metal bond, which fills voids between abrasive grains of extra-hard substance, with a thin surface film having a higher strength than the metal bond. CONSTITUTION:First, abrasive grains of extra-hard substance such as diamond, CBN, etc., are arranged on a base metal, and metal bond is fusion metallized by electrolytic deposition method to fix the abrasive grains on the base metal. The exposed surface of metal bond is roughened by sand-blasting, dressing, etc., to produce minute unevenness (flaws). Then the exposed surface of the metal bond is fusion metallized with such a reinforcing material as metal (Ti, W, Mo, Ni alloy), carbides (WC, TiC, Cr3C2, SiC), oxdes (Al2O3, TiO2, Cr2O3), and nitrides, followed by fixation, to form covering of thin film.
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