“Tiger stripes” on a high speed pinion made of carburized SAE9310 steel were investigated. The stripes were on lines of actionon the load side of the teeth coinciding with different angularpositions of the gear mesh. Scanning Electron Microscopy (SEM) ofthe affected areas showed fused metal particles, with a diameter of1-3 microns, and gas pockets. The morphology of the damage wastypical of electric discharge damage shown in ANSI/AGMA 1010-E95.This indicates that the stripes were in fact electric dischargedamage. Microhardness surveys on a metallurgical transverse sectionof a tooth showed a hardness loss due to the discharge, with loadside surface hardness even lower than 58 HRC. The cause of the”tiger stripes” and potential damage to the gear tooth wereanalyzed.
- Edition:
- 13
- Published:
- 09/01/2013
- Number of Pages:
- 7
- File Size:
- 1 file , 270 KB
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