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- Title
TOOTH-ROOT LOADBEARING CAPACITY OF SURFACE-DENSIFIED Fe-0.85 wt.% Mo POWDER METALLURGICAL GEARS.
- Authors
Hajeck, Marko; Frech, Tim; Beiss, Paul; Broeckmann, Christoph; Klocke, F.; Löpenhaus, Christoph
- Abstract
The tooth-root load-bearing capacity of four different surface-densified powder metallurgical (PM) gears was successfully predicted based on the fatigue data of laboratory specimens. The influencing variables considered in the calculation were density, geometry, carbon content, and residual stresses. For separation of the variables of carbon content and residual stresses, two experimental series were investigated: one consisted of through hardening test specimens with various carbon contents, and a second involved case hardening. The casehardened samples had a carbon-content gradient in addition to a density gradient and surface residual stresses. Two different densification methods were applied: rolling and shot peening. The calculations were confirmed using pulsator testing results of the gears. Based on an applicable calculation, further insights are provided as to optimization of the density gradient and how to take residual stresses into account in such calculations.
- Publication
International Journal of Powder Metallurgy, 2018, Vol 54, Issue 1, p33
- ISSN
0888-7462
- Publication type
Academic Journal