Abstract
This paper describes a study on the surface durability of surface-rolled sintered metal gears. Sintered metal gears were made using hobs with different tooth profiles, and then surface-rolled under various amount of rolling using two types of rolling machines. Heat treatment was performed after surface-rolling. The effect of surface-rolling on the surface property was examined by measuring hardness and porosity near surfaces of rolled gears. Running tests for test gears were carried out. The effects of the amount of rolling on the surface durability of sintered metal gears were determined, and these results were compared with the results for as sintered gears and wrought steel gears.
