Now showing items 1-20 of 552

    • 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 ...
    • Behavior of Rp3-High Spped on Short Time Nitriding in Fluidized Bed 

      Bâclea, Adolf; Cazacu, Nelu; Dobrovici, Sorin; Drugescu, Elena; Potecașu, Octavian (Universitatea "Dunărea de Jos" din Galați, 2005)
      For steel nitriding, treatment time is a important factor. Gas and plasma nitriding are usual method to increase surface properties by nitriding. A close retort is used. Total time for treatment are higher because are ...
    • 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 ...
    • Experimental Reaearch of Sintered Porous Materials of Bronze Powders 

      Vida-Simiti, I.; Jumate, N.; Bolog, T.; Batin, G. (Universitatea "Dunărea de Jos" din Galați, 2005)
      Porous sample were fabricated by sintering of bronze ( Cu Sn10) with different particle size range. The paper investigates the influence of the particle size distribution, temperature and sintering time on the structural ...
    • 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 ...
    • 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 ...
    • The Computation of the Calended Rolls Deflection Using the Stone-Gaevski Formulae 

      Florescu, Daniela; Florescu, Iulian (Universitatea "Dunărea de Jos" din Galați, 2005)
      This paper presents new models for the change of the internal configuration of the paper calender rolls with extension to those for plastics and rubber, and the deflection calculation procedure using Stone-Gaevski formulae.
    • Establishing of Rolling-Friction Coeffocient, for Hertzian Contacts Between Steel Balls and Different Kinds of Thermochemical Treated Steel Surfaces 

      Munteanu, Daniel (Universitatea "Dunărea de Jos"din Galați, 2005)
      It is known that for the ball displacement guide paths, the necessary startmoving force of the mobile half-couple is higher than the displacement-motion keeps force.Within the frame of this work, it has been designed 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 ...
    • Researches Concerning the Correlation of the Semiplanetary Rolling Process Factors 

      Cănănău, Nicolae; Alexandru, Petrică; Gurău, Gheorghe; Preda, Adriana (Universitatea "Dunărea de Jos" din Galați, 2005)
      An available solution of the elimination of the superficial cracks network at the continuous cast slabs is the semiplanetary rolling. The application of a semiplanetary rolling mill at the exit of slab from the curve zone ...
    • Aspects Regarding the Widia Plates Behaviour Covered with TiN During the Cutting Process 

      Gaita, Mihai; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2005)
      The microscopic property that depends on the interfacial structure and on the tension to which the interface is submitted is called adherence. The strong connection in the interfacial area, low tension gradients, the ...
    • 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 ...
    • 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, ...
    • 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 ...
    • Researches Regardingbthe Thermomechanical Treatments Influence on the Structure and Characteristics of the Aluminium Alloys for Aeronautics 

      Vasilescu, Elisabeta; Doniga, Ana (Universitatea "Dunărea de Jos" din Galați, 2005)
      The laboratory experiments were made on the two aluminium alloyed qualities used for aeronautical industry. More working conditions of the intermediary (PTMI) and finally (PTMF) thermomechanical treatments were used on ...