Author(s)

M. S. F. Lima, N. D. Vieira Jr. & S. P. Morato

Abstract

This work discusses the use of high-power Nd:YAG lasers to clean and texturize M2 tool steel surfaces. It is shown that surface ablation of the oxide layer was possible when the laser fluency was above 0.4 ~lcm'. Above this threshold, the surface presented craters due to the spread of the liquid metal. The region near to the surface was partly transformed from martensite to metastable austenite. The prior carbides were dissolved in the liquid metal and the martensite was decomposed during heating as can be seen in X-ray diffraction analyses. Physical vapor deposited layers of TIN were then applied to the modified surface. The present results had shown an increased surface adhesion of these

Keywords