Optical analysis is the use of ferrography to observe the morphology of the abrasive particles, size measurement and color identification, and to compare the typical abrasive grain spectrum for abrasive grain identification and feature analysis. The common types and characteristics of abrasive grains are mainly optical analysis. The morphology of the abrasive grains is observed by ferrography, size measurement and color identification, and the abrasive grain type identification and characteristic analysis are carried out according to the typical abrasive grain spectrum. The common types and characteristics of common abrasive grains are as follows:
(1) Normal sliding abrasive grains (also known as friction and wear particles) have a flaky shape with a smooth surface and a length of about 0.5~
15 μm, thickness between 0.15 and 1 μm, larger abrasive particles having a shape factor of about 10:1 and 0.5 μm abrasive grains of about 3:1. Such abrasive particles are generally formed by partial spalling of the shear mixed layer on the surface of the moving part. The size of the friction and wear particles generated during the running-in period is large, and during the normal wear, the friction and wear particles are generated by the Shanghai-Zaozhuang logistics company while being peeled off, and the size is small.
(2) Severe sliding wear particles When the parts wear and wear, the load and speed are too large, causing excessive shear stress on the wear surface of the parts, making the shear mixed layer unstable and causing local adhesion and severe surface. Plastic flow, resulting in severe sliding wear particles. The surface of the abrasive grain has obvious scratches and cracks, the contour is straight, and the size is large. The long axis dimension is above 15 μm, and the shape factor is about 10:1, which is an abnormal wear sign.
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The fourth port machinery and equipment lubrication and anti-corrosion management Shanghai to Rizhao logistics company page change (3) cutting wear particles when the friction of the equipment wear abrasive wear will produce cutting wear particles. Its shape is cutting, spiral and curved. A kind of cutting wear particles is formed by the sharp edges of the hard parts, and the protrusions or cracks are formed on the surface of the soft parts. Such abrasive grains are usually coarse, and the length from Shanghai to Taian Logistics Co., Ltd. is about 5 to 100 μm.
Width 2 ~ 5μm, another kind of cutting wear particles is formed by the hard abrasive particles in the lubrication system embedded in the surface, and then cut hard surface, such abrasive particles are smaller in size, length <10μm, width <1μm, thickness is only 0. 35 μm.
The presence of cutting wear particles is a sign of abnormal wear of the equipment friction pair. Http://news.chinawj.com.cn
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