No.1014 2016自動車用軸受関連技術特集号 非金属介在物と母材の密着による軸受寿命の向上 |
| カテゴリー | 論文 |
|---|---|
| 筆者 | 研究開発本部 材料研究部 佐田 隆 生産技術本部 熱処理生技部 野中由喜 研究開発本部 材料研究部 三上 剛 木澤克彦 |
| 要旨 | Non-metallic inclusions in the material of rolling bearings are well-known to induce subsurface initiated spalling. Among these inclusions, oxides in particular are believed to harm bearing life due to the weak adhesion between the oxide and the matrix. In this study, life tests were carried out for the inner rings of deep groove ball bearings made from low cleanliness bearing steel to which hot isostatic pressing (HIP) had been applied. From the experimental results, we confi rmed that life improvement of radial bearings can be achieved by bonding the oxides with the matrix. Furthermore, void closing analyses were carried out using a model for ideal void shape. From the correlation between the void closing rates obtained by these analyses and the interface bonding rates measured for the inner rings, we found that void closing analysis is effective in predicting the state of the interface between the oxide and the matrix. |
| キーワード | rolling bearing, rolling contact fatigue, non-metallic inclusion, hot isostatic pressing, fi nite element analysis |
| 関連リンク | 木澤克彦, 後藤将夫：材料清浄度評価による転がり疲れ寿命の推定, Koyo Engineering Journal, No. 163（2003）36. |
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