To be transferred to dry filter paper after dish, cover to prevent dust falling. This approach paper without special treatment. Under an optical microscope with transmitted light, direct light and indirect light to filter retentate on comprehensive inspections of common magnification 100X, 200X, 250X and 500X. Retentate include impurities or particle number, size and type Wait. In order to obtain particles results of elemental analysis, scanning electron microscopy can be used for analysis.
Characteristics and types of wear particles
Friction or normal wear and tear ordinary wear metal particle diameter is generally less than 10Lm, with the number of different devices and there are differences, the general per mL of oil particles containing a few to thousands.
Sliding or dragging wear sliding wear is generally due to equipment overload or insufficient lubrication of the metal caused by direct contact with the metal particles produced general outline rough surface scratches or grooves, fatigue fatigue debris fragments is normally provided by the gear, shaft neck or shaft surface caused by stress, these particles are angular fragments, the top surface is smooth, the side and bottom of the crystal structure,
Cutting Cutting wear worn by sharp metal or impurities caused by contact with the metal surface, these particles like a lathe chips. Typical was meniscus, it has damaged the bead and squeeze the concave side.
Layered wear
Wear layered rotating member bearing fatigue caused by these particles are typically smooth and flaky, with a regular boundary, which is the most common type of particle, it is an early warning signal bearing damage, and is present visual information or vibration information before.
Spherical particles
Spherical particles are melted friction wear particles generated by the other, indicating that deposit wear high stress, which may also be generated by the welding process, if the outer surface of these particles bright, there may be generated during discharge, particularly white metal bearings common.
Oxide oxide is heated and other wear debris generated color from straw color to dark blue.
