Investigation of the surface integrity of mechano-chemically finished powder metallurgy gears
Paper in proceeding, 2022

Automotive gears are facing stringent requirements regarding weight and functional surfaces, especially in view of the electric powertrain. To achieve these demands, powder metallurgy gears need to be finished using grinding, and in certain cases, mechano-chemical treatments. With regards to the latter, five different triboconditioning strategies based on vibratory tub finishing and/or centrifugal barrel finishing were considered and their effects on the surface integrity and friction behavior were investigated. Triboconditioning improved the surface roughness after grinding and resulted in higher compressive residual stresses. Additionally, microscopic observations of the surface topography were carried out. The lowest friction coefficients were observed for triboconditioning with a doped material (tribofilm) on the finished surface.

Powder metallurgy

Surface modification

Tribology

Friction

Gear

Triboconditioning

Grinding

Abrasive

Finishing

Surface integrity

Author

Dinesh Mallipeddi

Chalmers, Industrial and Materials Science, Materials and manufacture

Elias Forssbeck Nyrot

Applied Nano Surfaces Sweden AB

Martin Hansén

Applied Nano Surfaces Sweden AB

Tommy Brandt

China-Euro Vehicle Technology (CEVT) AB

Viktor Petterson

China-Euro Vehicle Technology (CEVT) AB

Mattias Rehn

Höganäs

Peter Krajnik

Chalmers, Industrial and Materials Science, Materials and manufacture

Procedia CIRP

22128271 (eISSN)

Vol. 115 142-147

10th CIRP Global Web Conference on Material Aspects of Manufacturing Processes
Gothenburg, Sweden,

A new solution for performance and light weight of Electric Vehicle transmission gears

Swedish Energy Agency (52720-1), 2021-10-01 -- 2023-09-30.

Subject Categories

Tribology

Manufacturing, Surface and Joining Technology

Other Materials Engineering

DOI

10.1016/j.procir.2022.10.064

More information

Latest update

1/10/2023