浸炭歯車材の残留応力分布と疲労強度 : 第1報,粒界酸化とショットピーニングの効果

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The main purpose of this paper is to clarify the effect of residual stress on thee bending strength of carburized gear steel which has an intergranular oxidation layer in the top surface and also to study the effect of residual stress by shot peening on the bending strength. The residual stresses were measured by an X-ray diffraction method. Bending fatigue tests of gear model specimens were carried out under the condition of constant stress range. Correlations among relation stress, hardness, and the bending strength were found that there were good correlations between residual stresses near the surface layer and the bending strength, and the latter was related to the hardness of the surface and the core in both cases of carburized and shot-peened gear steels. It was also found that it was important to remove the rough surface of the intergranular oxidation layer of carburized material and harden the surface layer by means of shot peening from the point of view of the fatigue strength.歯車の表面改質に関する研究の一環．
一般社団法人日本機械学会の論文
1989-12-25