切削工具材の表面工学的解析と欠損防止に関する研究 Ｉ 切削工具の凝着欠損に及ぼす工具表面仕上法の影響

Abstract

The objective of this study is to clarify the mechanism of metal adhesion on the cutting tool and to prevent its brittle fracture due to metal adhesion. The WC-Co cemented carbides, of which surfaces were processed by diamond wheel grinding, aluminum oxide wheel grinding, electrolytic grinding, sandblasting and coating of TiC and TiN, were subjected to cutting tests, in order to assess the tool life in view of brittle fracture due to metal adhesion, and to surface characterization to correlate it with the cutting performance. The important findings are that the surface treatments of carbide tool greatly affect metal adhesion and hence brittle fracture due to metal adhesion, and especially, carbide tools ground with an aluminum oxide wheel exhibit excellent adhesion resistance to yield longer tool life in the sense aforementioned and superior quality of machined surface.