The shot peening process is frequently utilized in order toinduce compressive residual stresses onbelow a surface, which willremarkably improve the bending fatigue strength of a gear tooth. inthis study, two kinds of case-hardened steels, namely thecarburized and the carbo-nitrided steels were used. First, bendingfatigue strength using a notched plate simulating a gear tooth wasinvestigated. As expected, the bending fatigue strengths of twokinds of case-hardened steels are improved by the shot peeningprocess. If the shot peening process is employed in order toimprove the bending fatigue strength of a gear tooth, the surfacedurability of the shot peened surface may be reduced because ofdegradation of its surface roughness. On the contrary, it isexpected that the surface durability may be improved by compressiveresidual stresses induced by shot peening. To understand thesefactors, the surface durability of the shot peened or/an barrelledcase- hardened steel rollers was investigated using a two rollercontact fatigue testing machine.
- Edition:
- 98
- Published:
- 10/01/1998
- Number of Pages:
- 11
- File Size:
- 0 files
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