浸炭鋼の表面残留応力におよぼす水ジェットを用いたハードショットピーニングの効果

概要

論文の詳細を見る
It is well known that residual compressive stress is an important factor to fatigue strength of carburized parts for automotive industry etc. A systematic study of effect of hard shot peening conditions using high pressure water jet on the surface residual stress distributions in carburized and nitrized SCM-420 steel with surface retained austenite of 4, 12 and 24 pct has been conducted. As a result, high peak value, 1125 MPa and high integrated mean value of stress distribution of compressive residual stress from surface to 300μm depth were obtained by hard or high energy shot peening with water jet. These increment were caused by elasto-plastic peening effect of matrix and transformation of retained austenite, especially most effective to the specimen with 4 pct surface retained austenite. Effect of 2 step peening on compressive residual stress at most surface was not conspicuous in this study.
社団法人日本鉄鋼協会の論文
1994-02-01