Now showing items 1-18 of 18

    • Aspects Regarding the Atmosphere Pollution Monitoring 

      Balint, Lucica; Rîpă, Minodora; Nită, Petre; Radu, Tamara; Lebădă, Simona (Universitatea "Dunarea de Jos" din Galați, 2005)
      This paper presents information regarding the variation of aerosols concentration in a central area in Galati city. For a period of time of 2 years and 5 months, there have been done correlations between aerosols ...
    • The Properties of Hardened Lead 

      Potecașu, Florentina; Potecașu, Octavian; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2005)
      Lead hardened through oxide scattering is investigated as raw materials for the fabrication of the support gratings of lead accumulators in order to increase their life service. For the preparation of lead powder hardened ...
    • 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 ...
    • 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 ...
    • Estimation of the Metallurgical Industry Impact on the Environment 

      Ciurea, Aurel; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2005)
      Objectively, the ecosystem in its development and working implies the accumulations on of some nonconcordances. Summing these disfunctions without taking into consideration their attenuation, may lead to producing, achieving ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • Nanostructured SiC-Ni Composite Coatings Obtained by Electrodeposition-a Tribocorrosion Study 

      Benea, Lidia; Iordache, Viorel; Wenger, François; Ponthiaux, Pierre (Universitatea "Dunărea de Jos" din Galați, 2005)
      The tribocorrosion properties of SiC (20nm) - Ni nanostructured coatings have been studied in pin on disc tribocorrosimeter connected with an electrochemical cell. The objectives of our study in principal is to fully ...
    • A Researches for the Determination of the ATC Si10Mg Alloy Fatigue Life, function of Different Applied Thermal Treatment Cycles 

      Dima, Adrian; Minea, Alina Adriana; Dima, Iulia-Margareta (Universitatea "Dunărea de Jos" din Galați, 2005)
      The experimental researches which were made, emphasized the opportunity of applying heat treatment cycles, in order to increase fatigue life of ATC Si 10 Mg alloy. The increase of minimum fatigue resistance is approximately ...
    • 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 ...
    • 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”. ...
    • 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)
    • 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 ...