高濃度浸炭焼入れ歯車の負荷能力に関する研究

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This paper presents a study on the load bearing capacity of super-carburized gears. Test gears and rollers of MAC14 and SCM415 steel were super-carburized or eutectoid-carburized under different carburizing conditions. The bending fatigue and contact fatigue tests were carried out for these test specimens. The effects of case depths on the bending fatigue strength of gears and contact fatigue strength of rollers were determined. The bending fatigue strength of super-carburized gear was found to be almost equal to that of eutectoid-carburized gears. The contact fatigue strength of super-carburized roller becomes larger with an increase of case depth and is larger than that of eutectoid-carburized rollers in the case of larger case depth. The surface failure modes for super-and eutectoid-carburized rollers were spalling. The load bearing capacity of super-and eutectoid-carburized gears was found to become larger by shotpeening.
2001-10-25