Study on the Effect of Laser Processing Parameters on Microtexture Morphology

Abstract

The microtexture with different morphological characteristics is obtained by changing the processing parameters of laser marking machine. The microtexture morphology characteristics are observed, and the width and depth of microtexture is measured. At the same time, the theoretical model of laser processing is established to solve the change rule of the processing morphology. The average friction coefficient variation of specimens obtained by different processing parameters is tested by universal friction and wear tester. The results show that the width of microtexture increases with the increase of laser processing power and decreases with the increase of laser scanning frequency, which is consistent with the theoretical results of laser processing. The depth of microtexture increases with the increase of laser processing power and scanning frequency. When the scanning times are 3, the width and depth of microtexture reach the maximum. With the decrease of scanning speed, the width and depth of microtexture increase gradually. Friction experiments show that when the processing power is 60–70 %, the lubrication can achieve the optimal value.