Fascicula IX: Recent submissions

Afișează articolele 241-260 of 552

    • The Actionnary System of the Continnous Discharge Furnace from L.T.G.-1. Mittal Steel 

      Dragomir, Ștefan; Tudor, Beatrice; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2005)
      In this study the authors made a systematically research about the actionnary system at the continuous discharge heating furnace. It take in account the possibility to use a new material, with most good wear resistance, ...

    • Modelling of the Flow and Deformation Fields at teh Profiles Rolling by Field Lines Method 

      Cănănău, Nicolae; Petrea, Ionel; Corobete, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2005)
      This paper presents a method for modeling of the rolling process based at the deformable continuous medium mechanics, the theory of field lines. The rolling of the profiles and plates may be evaluated as the plane strain ...

    • Mathematical Model of the Strip Rolling Made of the Sinterized Metallic Powders 

      Petrea, Ionel; Istrate, Sorin Miltiade (Universitatea "Dunărea de Jos" din Galați, 2005)
      The minimum-power method has been used to investigate the final ratio soft-layer thickness to tough-layer thickness in bimetals with porous layer rolling. The velocity fields has been determined and the total deformation ...

    • Reasearches Regarding Structural Changes Due to Nickel Microlalloying of Hot Galvanizing Baths 

      Boiciuc, Radu; Preda, Adriana; Boiciuc, Simona (Universitatea "Dunărea de Jos" din Galați, 2005)
      This work offers a synthesis of researches performed in laboratory and regards the nickel microalloying of hot galvanizing baths. Experiments followed the structural changes of both hot galvanizing bath and deposed layer ...

    • Chemical and Structural Changes for Bimetallic Materials Obtained by the Welding Process 

      Ciocan, Anişoara (Universitatea "Dunărea de Jos" din Galați, 2005)
      This paper presents the transformations which take place during the obtaining process of bimetallic materials. As a plating process was used the welding. The added material was a bronze with aluminum complex alloyed with ...

    • Influence of Atmospheric Conditions on the Mechanical Properties of Pet Rubber Composites 

      Vlăduță, Cristina; Duță, Anca (Universitatea "Dunărea de Jos" din Galați, 2005)
      The aim of paper is to study the influence of environmental open air conditions on the PET-rubber composites. Two set of samples (Type I, Type II) were obtained with the same composition, but the composites of Type I are ...

    • Laser Surface Hardening of 51Crv4 Steel 

      Levcovici, Sanda Maria; Levcovici, Dan Teodor (Universitatea "Dunărea de Jos" din Galați, 2005)
      The work presents the surface changes in microstructure and properties by quenching the 51CrV4 steel from liquid and solid phase, using a CO2 continue laser wave with 900W power. In order to determine the hardening ...

    • Elastoplastic Model for the Steel Bars Under Thermal Treatments 

      Alexandru, Petrică; Potecașu, Octavian; Potecașu, Florentina (Universitatea "Dunarea de Jos" din Galați, 2005)
      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 ...

    • Zinc Layer Removal at the Steel Appliances Scraps 

      Balint, Lucica; Ciocan, Anișoara (Universitatea "Dunărea de Jos" din Galați, 2005)
      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 ...

    • Behavior of 1% Cr Steels at Fluidized Bed Nitrocarburizing 

      Dobrovici, Sorin; Cazacu, Nelu; Bâclea, Adolf; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2005)
      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 ...

    • Experimental Studies on Structure Profile of Cast Alumininum Alloys 

      Minea, Alina-Adriana; Dima, Adriana (Universitatea "Dunărea de Jos" din Galați, 2005)
      This paper presents experimental studies regarding the behavior after heat treatment of two cast aluminum alloy. So, we selected a typical charge for studying the structure profile. The studies that we have done can ...

    • Mechanical and Tribological Properties of TiCxOy Thin Films 

      Munteanu, Daniel; Borcea, Bogdan; Munteanu, Alexandru; Cozma, Rodica; Vaz, Filipe (Universitatea "Dunărea de Jos" din Galați, 2005)
      The main purpose of this work consists on the preparation of single layered titanium oxycarbide, TiCxOy, thin films, deposited by d.c. reactive magnetron sputtering. The depositions were carried out from a TiC solid ...

    • Aspects Regarding the Biocorrosion of the Paper Manufactured Machines 

      Stanciu, Constantin; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2005)
      This paper presents the main microorganisms causing biocorrosion, the concentration, their effects and a series of measures for their reduction. The conclusion is that the sulpho-reducing bacterius are responsible for ...

    • Laser Cladding of Ni-Cr-B-Fe_Al Alloy on a Steel Support 

      Levcovici, Sanda Maria; Levcovici, Dan Teodor; Gheorghieș, Constantin; Boiciuc, Simona (Universitatea "Dunărea de Jos" din Galați, 2005)
      Multilayer coating by injection of powder with 8.9% Cr, 4.5% Fe, 5.1% B, 2.4% Al, 0.6% Cu; all reminded of Ni, as chemical composition, in melted bath by CO2 continuous wave laser connected to x-y-z coordinate table was ...

    • Possibilities to Study the Mixing State and Energy Dissipation in Metallurgical Reactors Using a System Based on Coloured Liquids 

      Niță, Petre Stelian; Vasiliu, Adrian; Bașliu, Vasile (Universitatea "Dunărea de Jos" din Galați, 2005)

    • Thermomechanical Processing of Microalloyed Steels Used for Naval and Oil Industries 

      Doniga, Ana; Vasilescu, Elisabeta; Istrate, Miltiade; Măcuță, Silviu (Universitatea "Dunărea de Jos" din Galați, 2005)
      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 ...

    • The Influence of the Thermomagnetic Treatments on the Hardness Number of Steels and the Superficial Layers Nitrided Durability 

      Papadatu, Carmen Penelopi (Univeritatea "Dunărea de Jos" din Galați, 2005)
      Two types of steels subjected to a nitriding thermo-chemical treatment after thermomagnetic treatments. The structural aspects into superficial layer of these steels are studied during friction process by using of an ...

    • Coatings Systems: Chromium Carbide, Nitride and Carbonitride 

      Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2005)
      The process of the chemical deposition from vaporous implies the adsorption of the mobile atoms (monomers) on the substrate surface, their migration with embryos and stable nucleus formation, followed up by further growth ...

    • Analytical Model of Forge Cutting Process with Asymmetrical Tools 

      Cănănău, Nicolae; Hanganu, Doru (Universitatea "Dunărea de Jos" din Galați, 2005)
      In this paper is developed the theory of forge cutting process feasible with asymmetrical tools. The asymmetrical cutting process is different of the symmetrical cutting process. This type of process is necessary to ...

    • A New Vision About the Dimensioning Calculus for the Frame of the Cold Mill Machine 

      Dragomir, Ștefan; Dragomir, Georgeta (Universitatea "Dunărea de Jos" din Galați, 2005)
      Dimensioning calculus for a rolling mill machine frame, using resistance classical methods allows determines the introduction of errors .For to do a better precisely of calculus we propose to use “Finish Elements Method”. ...