Wear Reduction of Wheel Specimens by Duplex Shot Peening in Dry Rolling/Sliding Contact Tests

Abstract

The effect of duplex shot peening treatments with Al 2 O 3 particles and MoS 2 solid lubricants on wear reduction of wheel specimens was investigated in extensive dry rolling/ sliding contact tests. The duplex shot peening treatments provided excellent wear reduction under severe loading and sliding conditions because the uniform and minute surface roughness given by the primary shot peening treatment with Al 2 O 3 particles could keep the duplex treated MoS 2 layers with low friction coefficients on the wheel specimen surfaces. Furthermore, the crystal orientation of the duplex treated MoS 2 layer was well aligned and contributed to excellent wear reduction.

Development of Earth Device for Freight Car's Plain Bearing

“…The clearance has a tapered section and a vertical section, and 0.35 g of carbon particles are inserted into the dent and the clearance. A carbon coating [6] with a thickness of 1 to 2 µm covers both tapered section surfaces to prevent oxidation of the enclosure section surfaces.…”