刃物の切れ味の研究（第5報）剃刀における組織と切れ味の関係について

抄録

The relationship between the structure and the sharpness of razor blades was studied. 1.21% carbon steel tapes were quenched from varying temperature and tempered at 175°. Razor blades were made of these samples and they were tested by string-and paper-cutting tests. It was found that the samples which were quenched from the temperature under Acm showed equal durability in the paper-cutting test. The samples which were quenched from the temperature higher than Acm, showed that the higher the quenching temperature, the less was the durability of the blade. The writer tested also the 13Cr stainless steel razor blades. These blades lost their sharpness rapidly in the initial 3 times’ paper-cutting tests but thereafter showed good durability as compared with the carbon steel blades.