Patent ID: 6319109
Filing Date: 2001-11-20
Classification: B24D

Abstract:
A disk-shaped grindstone comprising a base disk and an abrasive layer which is bonded to said base disk, said disk-shaped grindstone being characterized in that:said base disk is provided by a rapidly-solidified aluminum alloy whose major component is Si, wherein said rapidly-solidified aluminum alloy includes 15 wt %-40 wt % of said Si, 0.5 wt %-6 wt % of Cu, 0.2 wt %-3 wt % of Mg, and the balance consisting principally of aluminum; and in that:the ratio of a tensile strength of said base disk to a specific gravity of said base disk (tensile strength [MPa]/specific gravity) is not smaller than 90, and the ratio of a fatigue strength of said base disk to said specific gravity of said base disk (fatigue strength [MPa]/specific gravity) is not smaller than 30.