K-1021 残留オーステナイトのマルテンサイト変態が圧縮残留応力ヘ及ぼす影響(S14-1 表面改質材の特性(1))(S14 表面改質材の特性)

概要

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It can be concluded that introduction of large and deep compressive residual stress is useful to increase the fatigue limit of mechanical parts, such as carburized gear subjected to R(stress ratio)≧0. One of the techniques to improve such residual stress distribution is to use shot peening method, and it is known that retained Austenite is transformed to Martensite by this method. However, it is not clear influence of retained Austenite upon compressive residual stress. Therefore, the authors conducted an experiment using vacuum carburized and carbonitrided test pieces and evaluated the influence by stress shot peening and stress subzero treatment, systematically.
一般社団法人日本機械学会の論文
2001-08-22