Influence of Shot Peening and Carbon Content for Low Cycle Fatigue Strength of Carburized Steel

Author:  Toshiya Tsuji, Yuji Kobayashi
Source:  ICSP-13
Doc ID:  2017054
Year of Publication:  2017
Abstract:  
Introduction: In recent year, strengthening of automotive gear is required by many automotive manufactures to reduce the weight of parts. 1) Bending fatigue strength and contact fatigue strength are required on automotive gear. Shot peening is used as strengthening method for automotive gear. 2)-3) Shot peened automotive gear is gotten higher fatigue strength at high cycle fatigue region. On the other hand, low cycle fatigue is required at differential gear by inducing load when car start. Dr. Shiga4)reported that medium–carbon martensite steel was gotten high low cycle fatigue strength by compressive residual stress. However, shot-peened medium-carbon martensite steel was not considered in the paper. In this study, we carried out the investigation of low cycle fatigue strength against shot peened medium–carbon martensite steel.