Progress in the Development and Utilization of Ferrography
FOXBORO/TRANS-SONICS INC BURLINGTON MA
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Particles resulting from the wearing of machine surfaces are recovered with a Ferrograph analyzer. The particles have unique characteristics depending on the material of the wearing surfaces and the wear mode. The principal methods of identifying the materials of individual particles are discussed. Chemical reactions from the gaseous phase appear to offer the possibility of identifying materials on the basis of color without losing the particle morphology. Six regimes of sliding steel wear have been identified. It appears that much research on friction and wear is concerned with regimes that do not obtain in normally running machines. Lubricants may be considered as shifting the load, temperature and speed at which a transition from one regime to another occurs. The combined effects of the physical and chemical properties of the oil may be rated by observing the regime boundaries. The existence of a shear mixed layer is discussed.
- Test Facilities, Equipment and Methods