アルミナ系材料の超硬度化改質(第2報) : TiO_2添加アルミナセラミック切削工具

概要

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The hardness of alumina ceramic cutting tool can be increased about 1.5-1.6 times by putting titanium oxide. The alumina ceramic cutting tool based on purified alumina oxide material is embedded in the titanium oxide powder, and then is thermally treated in an electric furnace to diffuse the oxide additive from the surface to inside by the solid solution. After adding titanium oxide, the Vickers hardness of the surface layer of the ceramic cutting tool is increased from the original 1800HV0.5 to 2900HV0.5. The result is that after titanium oxide additive treatment, alumina ceramic cutting tool has distinctly the restrictive effect on flank wear and crater wear in cutting process. But when the temperature of the thermal treatment is too high, the wear of the cutting tool occurs very rapid, because the alumina grains of the alumina ceramic cutting tool become bigger.
公益社団法人精密工学会の論文
1998-02-05