Table of Contents Author Guidelines Submit a Manuscript
Advances in Materials Science and Engineering
Volume 2011, Article ID 563410, 8 pages
http://dx.doi.org/10.1155/2011/563410
Research Article

Metallurgical Aspects of Laser Surface Processing of PM Cr-V Ledeburitic Steel

Faculty of Mechanical Engineering, Czech Technical University in Prague, Karlovo Nám. 13, 121 35 Prague 2, Czech Republic

Received 13 July 2010; Revised 23 November 2010; Accepted 6 December 2010

Academic Editor: J. Dutta Majumdar

Copyright © 2011 Peter Jurči et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Vanadis 6 ledeburitic-type steel was laser surface remelted. Microstructural changes and hardness in laser affected material were investigated using light microscopy, SEM, and EDS-microanalysis. It was found that the laser surface melting and subsequent rapid solidifying led to softening of the material, due to presence of retained austenite. The melting of the material begins with the transformation of M7C3-carbide into a liquid and finishes via the dissolution of primary solid solution grains. The solidification proceeded in a reverse manner while the eutectics became often so-called degenerous form.