Disk-shaped grindstone
AssigneeNoritake Co., Limited
InventorsTsuyoshi Fujii, Takeshi Nonogawa, Kenji Itoh
Life of this patent
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Abstract
A disk-shaped grindstone including a base disk and an abrasive layer which is bonded to the base disk. The base disk is provided by a rapidly-solidified aluminum alloy whose major component is Si, wherein the rapidly-solidified aluminum alloy includes 15 wt %-40 wt % of the Si, 0.5 wt %-6 wt % of Cu, 0.2 wt %-3 wt % of Mg, and the balance consisting principally of aluminum. The ratio of a tensile strength of the base disk to a specific gravity of the base disk (tensile strength/specific gravity) is not smaller than 90. The ratio of a fatigue strength of the base disk to the specific gravity of the base disk (fatigue strength/specific gravity) is not smaller than 30.
Claims14
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.
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, 3 wt %-10 wt % of at least one of Fe, Mn and Ni, 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.
Dependencies are inferred from the claim text.