焼結硬ぜい材料の加工損傷に関する研究(第2報) : 超硬合金工具材料の曲げ強さに及ぼす加工損傷の影響

概要

論文の詳細を見る
This investigation examines the surface crack and the residual stress caused by machining of cemented carbides used for cutting tool. These were evaluated from the bending strength, the microcrack length and the fracture toughness on the basis of fracture mechanics by using the transverse rupture test. Within tested materials, the surface crack length was 6 to 20 μm. This value was smaller than thickness of deformed layer acting compresive residual stress. It is found that the surface crack length decreases with decrease in grain size of grinding wheel, and with decrease in depth of cut in grinding operation. Therefore the bending strength increases with decreasing grain size and depth of cut.
公益社団法人精密工学会の論文
1992-01-05