The effect of manufacturing method and running-in load on the surface integrity of efficiency tested ground, honed and superfinished gears
Journal article, 2019

This study compares gear surface characteristics generated by grinding, honing and superfinishing of case-hardened steel, including the evolution during efficiency testing with two different prior running-in loads (0.9 GPa and 1.7 GPa). The most influential factor was surface roughness. Micro-pitting was associated with surface asperities and hence only seen in ground and honed gears, while being absent for super-finished gears. The micro-pitting was enhanced by running-in load, but only for rough surfaces. Deformation-induced localized microstructure impact was associated with cracks. Residual stresses reached similar levels after efficiency testing. Phosphorous content in the gear surface was connected to surface roughness and running-in load.


Efficiency testing

Finishing processes

Surface integrity


Dinesh Mallipeddi

Chalmers, Industrial and Materials Science

Mats Norell

Chalmers, Industrial and Materials Science, Materials and manufacture

M. Sosa

Royal Institute of Technology (KTH)

Lars Nyborg

Chalmers, Industrial and Materials Science

Tribology International

0301-679X (ISSN)

Vol. 131 277-287

Subject Categories


Manufacturing, Surface and Joining Technology

Other Materials Engineering

Areas of Advance

Materials Science



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