Fatigue Strength of Induction Hardening steel (S45C) with a Key Groove in the Experiment of Rotated Bending
抄録
This study has investigated out the fatigue strength of induction hardening steel materials. Some kinds of specimen possessed key grooves and some did not. Paticularly, the materials with key grooves used in this experiment possessed the various depths of induction hardening. The fracture surfaces were investigated by means of an electron microscope. The conculusions obtained are as follows: (1) Fatigue limits (1×10＾7cycle) increased about 13.6% at the material A(deep induction hardening steel), about 21.6% at the material B(shallow induction hardening steel), and about 8.16% at the material C(steel with no induction hardening). Fatigue limits mentioned above were caluculated using fatigue limits of the materials of key grooves as standard of calculation. (2) The crack propagation patterns of fatigue was observed in the key groove. In particular, the meterial A was observed to have crack propagation to the direction of 45 degrees from the root of the key groove.
キー溝を有する高周波焼入れ鋼(S45C)の回転曲げ疲労強度
.png)
nagano_nct-19-02.pdf
(1.22MB)
