Study of Thermal Conductivity Variation Depending of the Heat Treatment for Tool Steels - PERJU, Manuela Cristina; NEJNERU, Carmen; ACHIŢEI, Dragoş Cristian; LĂRGEANU, Anca Elena; STEFĂNICĂ, Roxana Gabriela (The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2011)