高温切削における加工変質層に関する研究(第 3 報)

概要

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In this report, as well as 2nd one, the author used the Local Electric Resistance Heating Method. The surface of metallic materials treated either by hot-machining or by cold-machining has a layer different from that of the inside. We call this layer the Damaged Surface Layer. This report shows adout the Damaged Surface Layer of hot-machining carbon steel S45C, comparing with that of cold-machined one; this carbon steel S45C is treated by annealing, quenching, and tempering. The result of these experiments are as follows : (1) When annealed carbon steel S45C is hot-machined, the cutting surface shows little hardness. (2) When quench-tempered carbon steel S45C is hot-machined, work hardening by machining dosen't show very much. (3) Fatigue life increases with an increase of heating current.
山口大学の論文