Research On Surface Topography Characteristics Of Laser Micro-Hole Drilling

The surface of laser micro processing has great differences compared with the traditional machining surface. To research surface topography is of great significance for laser processing surface property. Combined with the laser mechanism, the surface characteristics of micro blind-hole drilled with different pulse energy and number were studied in the materials of spring steel 65Mn, stainless steel SUS301 and ceramic Al2O3. The results indicate that large pulse energy makes the hole much irregular and multi-pulse may cause the surface much rough. A large amount of molten material gathers around the hole for 65Mn and SUS301 while not for Al2O3 because of different processing mechanism. Therefore, process parameters and conditions should be explored for better surface topography of laser drilling.