S115022 すべり軸受材料の潤滑摩耗形態図の構築([S11502]トライボロジーの基礎と応用(2))

Abstract

It is one of the main subjects in tribology to systematize the wear theory. It is necessary to know the various wear mode caused under the given condition by clarifying the various wear mechanisms. Various wear mode diagrams have been proposed. However, the wear mode diagram under the lubricated condition is not enough. In the present work, the construction of the lubricated wear mode diagram is tried to predict and to diagnose the wear properties of sliding bearing material used in the lubricated condition. The sliding wear tests of WJ2 were carried out using a block-on-ring apparatus with wide range of experimental conditions. A counter material was SF540 carbon steel. In order to classify wear modes, we investigated the relations among friction coefficient, worn surface, wear debris, specific wear amount of WJ2 and the minimum oil film thickness which were calculated from the EHL theory. The worn surface and the wear debris were observed using an optical microscope and a scanning electron microscope (SEM). As a result, the wear mode of WJ2 was newly classified into three types of large-scale adhesive wear, small-scale adhesive wear and fatigue wear using the experimental results. The availability of the wear mode diagram constructed in this way can be proved by a lot of experimental results tested over wide range of experimental conditions.