3126 高周波および浸炭焼入れ歯車の硬化層と曲げ疲労強度(S34-2 伝動装置の基礎と応用(2) 歯車の強度,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

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This paper presents a study on hardened layer and bending fatigue strength of induction-hardened and case-carburized gears. The measurement of hardened layer and the bending fatigue test were carried out for induction hardened gears made of as-rolled and thermally refined S35C and S45C steels, and case-carburized SNC815 steel gears, and then profiles of hardened layer, surface hardness and S-N curves were obtained. Effects of the pre-treatment, and hardening condition on profile and micro-structure of hardened layer of induction-hardened and case-carburized gears were examined. The relationships between surface hardness, hardened depth and bending fatigue strength were determined. On the basis of results obtained, maps to determine an induction-hardening condition suitable for the bending fatigue strength of induction-hardened gears were proposed, and the bending fatigue strengths of induction-hardening gears were compared with those of case-carburized gears.
社団法人日本機械学会の論文
2008-08-02