Characteristics of Internal Surface Layer of Machine Parts Using Rebound Shots

Author:  Yasunori Harada
Source:  Conf Proc: ICSP-9 (pg 472-477)
Doc ID:  2005127
Year of Publication:  2005
ABSTRACT In the present study, shot peening process of the internal surface of machine parts in which rebound shots collide with the internal surface was investigated. In this process, the direction of collision of rebound shots perpendicular to the internal surface. In the experiment, an air type shot peening machine was employed. The workpieces were aluminum alloy, carbon steel and coiled spring steel. The jigs used for rebound shot peening were made of alloy tool steel and tungsten carbide. The jigs used for rebound shots have the surface with a slope to the internal surface of machine parts. The internal surface of workpieces can be sufficiently collided by the shots. The distributions of hardness, residual stress and surface roughness in the peened workpieces of the coiled spring steel were measured. It was found from the present study that the present process is suitable for the improving the internal surface of machine parts.

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