GSD-8 LOAD-CARRYING CAPACITY OF AUSTEMPERED DUCTILE IRON (ADI) GEARS : SURFACE DURABILITY OF FINE PARTICLE SHOT-PEENED ADI GEAR(GEAR STRENGTH AND DURABILITY)

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In this paper, the load-carrying capacity, in particular, the surface durability of gear pairs with a combination of Austempered Ductile Iron (ADI) gear and hardened steel one is investigated using a power-circulating type gear testing machine. It is practical that a hardened steel such as case-carburized one is used for pinions to increase its bending strength and surface durability, and ADI is used for large gears to use its advantages such as near-net-shape casting. In this case, a shot-peening must be conducted on the tooth of ADI gears to increase its bending strength. But the surface durability of conventional shot-peened ADI gears decreases because the surface roughness increases by the conventional shot-peening with shots diameter of 0.3mm. The authors applied two types of fine particle shot-peening with shots diameter of about 40〜45μm in order not to make the gear tooth surface rough. As the result of experiments, the surface durability of fine particle shot-peened ADI gear is improved compared with conventional shot-peened one because the tooth surface roughness does not increase. In addition, the surface integrity, i. e. surface roughness, hardness and residual stress, is investigated in relation to the surface durability.
一般社団法人日本機械学会の論文
2001-11-15