A.l.m.t. Corporation

Sumitomo Electric Industries, Limited

Nobuhide Nakamura

Katsumi Okamura

Akito Ishii

Masato Michiuchi

Kentaro Chihara

Kei Hirai

Masahiro Ohata

A coated super-abrasive grain comprises: a body composed of cubic boron nitride; and a coating film coating at least a portion of a surface of the body, the body having a dislocation density of 9×10/mor less, the coating film including one or more types of compounds composed of at least one type of element selected from the group consisting of a group 4 element, a group 5 element and a group 6 element of the periodic table, aluminum and silicon, and at least one type of element selected from the group consisting of oxygen, nitrogen, carbon, and boron.

Coated super-abrasive grains, abrasive grains, and wheel

A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder. The diamond abrasive grains and the CBN abrasive grains have projecting tips acting on a workpiece, the projecting tips having a variation in height of 10 &#x3bc;m or less, the diamond abrasive grains having their projecting tips with irregularities of 0.1 &#x3bc;m or more in height.

Super-abrasive grinding wheel

A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder.

Growing community of inventors

Kato-shi, Japan

Nobuhide Nakamura