IMPROVEMENT IN MICRO HARDNESS OF M.S. (C-40) BY UTILIZING VIBRATORY TECHNIQUE IN ORDINARY BALL BURNISHING PROCESS

Surface characteristic of material plays vital role in performance of a component such as load bearing capacity, fatigue strength, resistance to corrosion, friction, wear, etc. Some of parameters which influence the above performance characteristics are geometric features of the surface, its hardness, and degree of cold work and nature of residual stress induced. Burnishing forms an important member in the family of these post machining processes. The deforming action of the ball which governs the micro hardness is strongly governed by the trajectory movement of tool. The trajectory movement of tool can be adjusted in proper range by selecting proper combinations of speed, feed, vibration frequency and amplitude. Addition in vibratory technique, the investigation of electromagnetic vibrator using in ordinary ball burnishing process perform reliable and effective surface enhancement. The plastic deformation on the part surface can easily achieved by applying considerably lower pressure as compared to other conventional techniques. With the use of vibratory technique on lathe machine, further improvement is possible in micro hardness of work piece.