| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the lubricity while suppressing remarkable change in dimension of a rolling bearing, and to improve the wear resistance and seizure resistance. SOLUTION: A nitrosulfurized layer is formed on at lest either surface of a bearing component. The nitroscelfurized layer is obtained through the gas nitrosulfurizing treatment, and because the sulfur composition excellent in lubrication is contained in the layer, the friction resistance is reduced, and the coagulation phenomenon can be prevented while suppressing the temperature rise by the friction heat even in a condition where the lubricating oil is difficult to feed. In addition, the gas nitrosulfurizing treatment can be achieved at a lower temperature and in a shorter time compared with the conventional tufftride treatment and the thermosetting treatment, and the thermal strain of a base metal is difficult to generate.</p> |
