抄録
The aluminum sludge is transferred into α – alumina crystal structure by heat treatment. In this paper, from view point of effective utilization of aluminum sludge, we conducted rolling wear test for composite sintered by spark plasma sintering using aluminum alloy powder and α – alumina sludge in order to investigate effects of surface condition and combination of roller unit on rolling wear. The experimental results were validated by analysis of shear stress distribution under Hertz contact pressure by Finite Element Method (FEM). As result of rolling wear test using same material combination, rolling wear life of large surface pitch improved. From computing shear stress distribution by FEM, maximum shear stress value of large surface pitch showed low value in comparison to the small surface pitch. Next, in the case of rolling wear test using different materials combination of aluminum alloy only and composite including α – alumina sludge 2 %, rolling wear life of composite was shorter than the aluminum alloy only. As a result of shear stress distribution by FEM, occurrence of crack around the α – alumina sludge at near surface was predicted. It was found that the stress distribution related with crack occurrence was different in terms of combination of rolling materials.
