Now showing items 1-20 of 26

    • Possibilities to Evaluate the Value of the Marangoni Effect and of the Marangoni number in Refining Steel-Slag/Inclusion Systems 

      Niță, Stelian (Universitatea "Dunărea de Jos" din Galați, 2006)
      Starting from the impressive progress in studying the instabilities induced by capillary effects in systems of two immiscible fluids in chemistry, an analysis of factors in solutal Marangoni effect and Marangoni number ...
    • Oxidizing Influence Over Surface Structures and Properties for A3k Steel Nitrocarburized in Fluidized Bed 

      Cazacu, Nelu; Dobrovici, Sorin; Bâclea, Adolf; Tănăsescu, Victor; Preda, Nelu (Universitatea 'Dunărea de Jos" din Galați, 2006)
      Surface duplex thermochemical treatment (oxinitrocarburizing) has principal scope to obtaining superficial mechanical higher properties with increasing corrosion capacity. The paper is based by oxinitrocarburizing ...
    • Air Quality Monitoring in Galați. Case Study 

      Balint, Lucica; Rîpă, Minodora; Balint, Simion Ioan; Niță, Petre Stelian; Năstase, Gina (Universitatea "Dunărea de Jos" din Galați, 2006)
      This paper presents information referring to the variation of aerosols concentration in a central area in Galati. For a period of time of november2005 to november 2006, there have been made correlations between aerosols ...
    • Hardened Aluminum with Oxide Particles 

      Potecașu, Florentina; Potecașu, Octavian; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper presents the effect of size and dispersion degree of the particles of aluminum oxide, on structure, mechanical characteristics and phenomena that take place when heating at different temperatures for ...
    • Behavior of Welded Joints from Some Stainless Austenite Steel Eypes During Nitriding Process 

      Dima, Ovidiu (Universitatea "Dunărea de Jos" din Galați, 2006)
      Researches made on welded and nitrided samples from stainless austenite steel types show that nitriding thermo chemical treatment can be applied also for welded joints. As a result of the treatment, a diffusion layer ...
    • Some Issues Concerning Gear Wheels Fabrication by Sintering 

      Olevschi, Alexandru (Universitatea "Dunărea de Jos" din Galați, 2006)
      Powder metallurgy appeared in the XVIII century as result of industrial market demand for electric bulbs filaments made of wolfram. Nowadays powder metallurgy is applied in such fields as: automotive industry (cylindrical ...
    • Surface Hardening of 40Cr10 steel After Short Time Nitriding in Fluidized Bed 

      Bâclea, Adolf; Dobrovici, Sorin; Drugescu, Elena; Cazacu, Nelu; Preda, Nelu (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper is based by nitriding in fluidized bed experiments over laboratory plant. Fluidization applications are characterized by high values of mass and heat transfer coefficients. For experiments were used 40Cr10 ...
    • Mathematical Modelling of Steel Continuous Casting Hydrodynamics (1) 

      Munteanu, Viorel; Sava, Simona (Universitatea "Dunărea de Jos" din Galați, 2006)
      The quality increase of steel continuous casting and a reliability indices of afferent installations imposes the automation systems adoption of machines of continuous casting of steel. In this paper enters original ...
    • The Influence of Polarization Tension of the Grading Over thin Layer Properties of TiN Deposed Through PDV Method 

      Gaiță, Mihai; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2006)
      The deposits of tough thin layers on pieces and tools through PDV method knew a permanent and constant spreading owing to the great applicability of the resulting coatings which make that the thin layer deposit from the ...
    • Behavior of 1%Cr Steels at Fluidized Bed Nitrocarburizing 

      Dobrovici, Sorin; Cazacu, Nelu; Bâclea, Adolf; Drugescu, Elena; Preda, Nelu (Universitatea "Dunărea de Jos" din Galați, 2006)
      Paper is based by nitrocarburizing experiments made on laboratory plant. For experiments were used different samples of steel at different nitrocarburizing regimes. Influence factors were: temperature and ammonia ...
    • Experimental Equation of Deformation Behaviour of a Concrete Steel 

      Cănănău, Nicolae; Gurău, Gheorghe; Alexandru, Petrică; Corobete, Gheorghe (Universitatea "Dunărea de Jos" din Galați, 2006)
      The plastic deformation behavior is defined by the function of the deformation strength according to the strain, strain rate and temperature as the factor of the deformation process. The behavior law establishes by the ...
    • Art Pieces Casting from Brass, Destined to Artificial Local Lightening, Used in Orthodox Cult 

      Carcea, Ioan; Diaconescu, Florin; Diaconescu, Cristian (Universitatea "Dunărea de Jos" din Galați, 2006)
      In this paper are presented some realizations from SC RANCON SRL Iasi, which regards the casting of lighting local parts from brass, used in orthodox religion. Thus is highlighted the relationship between functionality, ...
    • Kinetic of Martensite Transformation in a Cu-13wt. %Al-4 wt.%Ni Shape Memory Alloy 

      Gurău, Gheorghe; Gurău, Carmela; Andronache, N. (Universitatea "Dunărea de Jos" din Galați, 2006)
      In this paper we present some results was obtained on the Cu-13wt. %Al-4 wt. %Ni shape memory alloy. This alloy was elaborated by a classic melting method starting at pure metals. A DSC analysis was made for quenched ...
    • Behavior of Some Stainless Nitrided Austenite Steel Types to Corrosion and Abrasion 

      Dima, Ovidiu; Mitoșeriu, Olga (Universitatea "Dunărea de Jos" din Galați, 2006)
      By nitriding, stainless austenite steel types can become surface hardened. Hardness can be greater at more than 1000 HV005 when the composition layer made of complex nitrides is obtained and more reduced till 500 HV005 ...
    • Some Aspects Regarding the Elaboration of Multiple precessional Gear Theory and Modern Manufacturing Technology 

      Bostan, Ion; Dulgheru, Valeriu (Universitatea "Dunărea de Jos" din Galați, 2006)
      The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of precessional transmissions with multicouple gear. In this paper, the authors present the mathematic model ...
    • Protective and Decorative Vacuum's Coatings on Wares of Artistic Castings 

      Grechanyuk, V.; Grechanyuk, I.; Grechanyuk, N. (Universitatea "Dunărea de Jos" din Galați, 2006)
      The problem of environmental protection is extraordinarily important, and its actuality will increase with every year. In this aspect, processes of depositing of coatings in vacuum have got serious advantages before ...
    • The Decreasing of the Energetic Losses at a Coke Cooling Plant 

      Vasiliu, Adrian; Năstase, Gina; Beglet, Natalia; Mirea, Vasile (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper presents an energetic and technologic analysis of the metallurgic coke dry cooling plant (CDCPO) operating, and also the optimization of this process in the case of an industrial plant, existing in the Steel ...
    • Research About the Vibration Parameters for a Cold Rolling Mill Machine 

      Dragomir, Ștefan; Dragomir, Georgeta; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2006)
      By using the equipments of vibration measurement we can fight against the damages (strip undulation and thickness variation on the length) who is show in while of mill work. The amplitude of vibration parameters determine ...
    • Thermodynamic Assesment of the Ci-Ti System in Microalloyed Copper Base Alloys 

      Vlad, Maria (Universitatea "Dunărea de Jos" din Galați, 2006)
      The correlations made between thermodynamic and kinetic data of the heterogeneous systems provided insight into the alloys properties. Experimental researches presented in this paper refer to the thermodynamics of Cu-Ti ...
    • Some Issues Concerning Gear Wheels Fabrication by Sintering 

      Olevschi, Alexandru (Universitatea "Dunărea de Jos" din Galați, 2006)
      Powder metallurgy appeared in the XVIII century as result of industrial market demand for electric bulbs filaments made of wolfram. Nowadays powder metallurgy is applied in such fields as: automotive industry (cylindrical ...