Laser Cleaning And Texturizing On High-speed
Steel Tools For Enhanced PVD Process
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
Related Book
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