Chemical modification for wear resistance material in automobile industry

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Name :Hemamalini Rawindran Group: ACB (A2) 1.0 Wear In materials science, the terminology wear simply means, the disintegration of material from a solid surface by the movement of another solid. Wear may result whenever there is sliding. A potential wear situation occurs when there is relative motion between two solids under load. Motion can be unidirectional or reciprocating either sliding or rolling. There may be a combination of rolling and sliding of wear which may occur due to oscillary movement at small amplitudes. The investigation of the techniques of wear is some piece of the control of tribology. Depending on the nature of the movement or of the media involved in an interaction under load, the following types of wear have been classified; 1. Adhesive wear 2. Abrasive wear 3. Corrosive wear 4. Surface fatigue There are few types of wear mechanisms that can be found in automobile components. The components that are involved includes the accumulator, rolling bearings, piston rings, brake pads, gears and etc whereby different type of wears can be identified from each components. 2.0 Wear materials in automobiles 2.0.1 Ball and roller bearings The ball and roller bearings is made up of several components such as two rings, rolling bodies, a cage (steel or bronze) to separate and guide the rolling balls, lubrication(oil or grease), protection (steel baffle) that is always lubricated. There are three types of roller bearings such as cylindrical, taper and spherical bearings. Rolling, compared to sliding requires less effort and rolling bearings give the some order of low friction as encountered under fluid film lubrication in journal bearings. In a typical assembly, the shaft is fixed to the inner race which rotates whi... ... middle of paper ... ...st a more reactive counterface , as in steel bearing, the slight decomposition of the IL is caused at times due to the reaction with iron. However, IL can be still used as a lubricant in bearing because it is a highly performing lubricant that still plays part in improvement of corrosion level. 3.0 Conclusion: Mechanical wear of bearings could be of varieties right from structures like abrasion and fretting to extreme structures, like smearing and skidding relying on the working conditions. Analysis of bearing damage observed under the scanning electron microscope aids in recognizing the mechanism and kind of wear. This further supports in building the cause of wear. The complete modification eventually is suitable in restorative measures of bearing. Subsequently the operational proficiency is ensured and life of different types of bearings could be enhanced.

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