Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 141-143 (July 2008), p. 255-260
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
This paper presents an analysis of the effect of CO2 laser processing parameters on thesurface modification and heat treatment of steels. The CO2 laser and sample movement processparameters are presented. The controlled operation of these in conjunction with each other isrequired to obtain better surface hardness and structure. H13 tool steel samples were rotated at highspeeds to keep exposure times below 0.3s. Laser processed samples were analysed using EDXspectroscopy, optical microscopy, Vickers and Martens micro-hardness testing, and X-raydiffraction (XRD). Results show how the hardness profile through the surface is related to the lasertreatment and resultant microstructures. Increased surface hardness was noted due to a completemicrostructural transformation to an amorphous state in the glazed samples. The usefulness of suchcoatings on tool steels, in conjunction with other thermal barriers, for the forming of semi-solidsteel alloys is presented
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.255.pdf
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