http://arthra.ugal.ro/handle/20.500.14043/26060 2026-04-16T11:54:58Z http://arthra.ugal.ro/handle/20.500.14043/26078 Elastoplastic Model for the Steel Bars Under Thermal Treatments Alexandru, Petrică; Potecașu, Octavian; Potecașu, Florentina In order to understand material behavior, during the stresses action produced by thermal effects of volume, was started from Hooke relations, whereat was added the expressions that take into account these effects. Have been chose the expressions in cylindrical coordinates for the relations simplification reason, but and because cylindrical pieces are frequent in practical thermal treatments The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science ISSN 1453 – 083X NR 1 – 2005 2005-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/26077 Zinc Layer Removal at the Steel Appliances Scraps Balint, Lucica; Ciocan, Anișoara All appliances contain an important quantity of steel and iron. These can be further recycled at the end of product usefulness. A component of the appliances is the bodies. These are made from galvanized steel. A study for the zinc coated layer removal from the surface of the galvanized steel, prior to recycling the steel scrap by melting in the steelmaking process is presented. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science ISSN 1453 – 083X. NR 1 – 2005 2005-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/26076 Behavior of 1% Cr Steels at Fluidized Bed Nitrocarburizing Dobrovici, Sorin; Cazacu, Nelu; Bâclea, Adolf; Drugescu, Elena Paper is based by nitrocarburizing experiments made on pilot installation. For experiments were used different samples of steel at different nitrocarburizing regimes. Influence factors were: temperature and ammonia concentration. Treatment time had a constant value 2h30min. Influences of factors were investigated by: samples mass modifications, surface structure (micrograph), layer depth to all samples and hardness HV5 on the surface. The results confirm possibility to use fluidized med like nitrocarburizing media and good behavior of steel. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science ISSN 1453 – 083X NR 1 – 2005 2005-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/26075 Thermomechanical Processing of Microalloyed Steels Used for Naval and Oil Industries Doniga, Ana; Vasilescu, Elisabeta; Istrate, Miltiade; Măcuță, Silviu This paperwork shows the laboratory experiments made on X60 and X65 steels with several intercritical thermomechanical treatment application. Two variants were used: “down-up” thermomechanical treatment with heating and rolling in the intercritical range and “up-down” thermomechanical treatment with preliminary complete austenitizing and rolling in the intercritic interval. High values of the strength characteristics and a good plasticity were gotten. A comparison was made with gotten results of the classical thermal treatment application (normalizing). The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science ISSN 1453 – 083X. NR 1 – 2005 2005-01-01T00:00:00Z