High Strength P/M Gears for Vehicle Transmissions
Final rept. 10 Aug 2006-1 Jul 2007
PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB
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Phase I of US Army TARDEC sponsored project entitled High Strength PM Gears for Vehicle Transmissions has been successfully completed at ARL Penn State. The primary objective of the project was to develop high strength PM steel gears with bending strength and surface durability performance equivalent to current wrought steel gears, and to demonstrate potential for significant cost savings. The project technical approach was to apply ausform gear finishing to PM steel gears in order to increase the bending strength, and more importantly the surface durability of PM gears, thereby making ausform finished PM gears the preferred components for US Army DoD ground vehicle transmissions. In the just completed Phase I of the project, ausform processing technology was developed and applied to hot forged PM gears produced by Keystone Powdered Metal Company, selected as the prime industrial partner for the program. Performance of ausform finished PM forged steel gears was demonstrated to be comparable to or better than wrought steel gears in comparative bending fatigue, surface durability and gear tooth impact tests. Cost of producing high strength PM steel gears produced by processing techniques developed in this program is about 43 lower than for wrought steel gears of equivalent quality.
- Surface Transportation and Equipment
- Machinery and Tools