P/M Materials for Gear Applications
PM materials for gear applications have been reviewed based on results of own investigations of gear tooth bending strength of simple spur gears and rolling contact fatigue resistance of rollers. It was concluded that surface densified casehardened P/M gears reached gear tooth bending strength of reference casehardened machined wrought steel gears. Surface densified case-hardened PM rollers reached RCF-resistance of casehardened wrought machined rollers. Surface densification plays the main role in reaching high performance of PM components. Chromium low alloyed PM materials show a promising potential for a high performance/cost ratio.