「インターヒート」処理による球状黒鉛鋳鉄の複合組織化と疲労強度特性の診断

概要

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The effect of "Inter-Heat"treatment, that is composed with different two types of "bainitic heat treatment"and"micropulse induction heating", on the fatigue reliability of spherical graphite iron was studied. The main results obtained were as follows, (1) A martensite structure of higher hardness on the surface layer and A bainite structure of higher toughness in the interior of SGI specimens were produced by "Inter-Heat"treatment. (2) The fatigue strength of "Inter-Heat"treated SGI was intermediate between the fatigue strength of martensitic SGI and bainitic SGI. (3) Fatigue cracks initiated at the micro-porosity in the internal bainite structure. The fatigue crack propagation was controlled by means of the residual stress induced by"micropulse induction heating".
一般社団法人日本機械学会の論文
1997-06-25