cBN SINTERED BODY FOR HIGH SURFACE INTEGRITY MACHINING, cBN SINTERED BODY CUTTING TOOL, AND CUTTING METHOD USING THE SAME

摘要

As compared with the conventional cBN sintered tools, the creation of a damaged layer formed on the processing surface of the cutting object suppression and by promoting the residual compressive stress, achieving an improvement in fatigue life, and also the tool life is also longer cBN content by percentage of the processing components It provides a high sintered body. More than 87% by volume has a cBN component of less than 99% by volume, and the outermost surface of the cBN sintered body (1) has a thermal conductivity greater than 100 W / m · K, 4a, 5a, at least one selected from 6a Group element and Al element and, C, a high-quality working surface properties cBN sintered body characterized in that the coating of heat-resistant film (2) has a thickness of 0.5 ㎛~12 ㎛ consisting of a compound of at least one element selected from N, O.