Abstract
This paper presents a study on the vibration and noise characteristics of austempered ductile iron (ADI) gears. Running tests for ADI, SCM 415 case-hardened, and SCM 435 normalized gears were carried out under different running conditions by means of a power-absorbing-type gear testing machine, and the circumferential, radial and axial vibration accelerations of the gears, the gear noise, and the root stress were measured. The vibration and noise of the ADI gear were found to be much lower than those of the SCM435 normalized gear due to the larger damping ratio of the ADI. Furthermore, the effects of the finishing method of a gear tooth and the isothermal transformation temperature on the vibration and noise characteristics of ADI gears were determined to a considerable extent.
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