BASE DISK TYPE GRINDING WHEEL

摘要

A base disk type grinding wheel for high speed grinding, wherein a base disk is made of a rapidly solidified aluminum alloy containing 15 to 40 wt % of Si, 0.5 to 6 wt.% of Cu, 0.2 to 3 wt.% of Mg, the remainder of the alloy being aluminum, wherein a plurality of grinding segment chips stuck to the peripheral surface of the base disk integrate a peripheral grinding wheel layer having superabrasives bound thereto and an inside peripheral abrasive grain layer having abrasive grains, which has a lower hardness than that of superabrasives, bound thereto with the same binding agent as that used in the peripheral grinding wheel layer and wherein the superabrasives are subjected to a heat treatment. In the grinding wheel, high stability of the strength of its base disk is exhibited due to the use of the above-mentioned material, and the segments can be stuck with ease and also a satisfactory decrease of the toughness of superabrasives can be achieved without detriment to its grinding characteristics.