SiCホイスカ強化セラミック工具の切削特性

概要

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Cutting performance of SiC-whisker (SiC_w) reinforced ceramic tools on the machining of gray cast iron was investigated. In continuous dry cutting, the toughened Al_2O_3 + SiC_w tool exhibited a stable and prolonged tool life compared to the Al_2O_3 + TiC tool. The life of the Al_2O_3 + SiC_w tool was about twice as long as the Al2O3 + TiC tool at the optimum cutting condition. Since groove wear was inhibited by the whiskers incorporation, the surface rough-ness of the workpiece after cutting was improved, resulting in the possibility of using the tool for finishing operation. Nevertheless, SiC_w reinforced ceramic tool can not be applicable for cutting of the cast iron containing a large amount of ferrite phase. In the interrupted cutting, a significant improvement of the tool life due to whisker reinforcement was observed in the alumina based tools compared to silicon nitride based tools. However, the SiC-whisker incorporation was effective for inhibiting the groove wear for both alumina and silicon nitride based tools.
公益社団法人精密工学会の論文
1990-01-05