疲労強度に及ぼす浸炭条件の影響

概要

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Rotating bending fatigue tests were conducted on SCM 420 steel specimens with three types of carburizing, i.e., eutectic carburizing, supercarburizing and plasma supercarburizing to examine the effect of carburizing conditions on the fatigue strength. The X-ray diffraction method was used to measure the residual stress. The stress intensity factor was calculated using the boundary element method on the basis of the residual stress. The fatigue strength decreased with increases in the amount of internal oxide. The fatigue strength of the polished specimen was almost constant irrespective of carburizing conditions. The crack propagation behavior obtained in rotating bending tests agreed with that obtained in axial loading tests when the effect of the residual stress was taken into account.
一般社団法人日本機械学会の論文
1993-08-25