Căutare 1993 -2018 după Titlu

Afișează articolele 40-59 of 552

    • Behavior of Cold Rolling Emulsions in the Obtaining Process of Steel Strips 

      Radu, Tamara; Ciocan, Anișoara (Universitatea "Dunărea de Jos" din Galați, 2014)
      The research was focused on determining an optimum rolling emulsion to be used on a cold rolling mill from Galfinband Galati Romania. In this plant are obtained steel strips with the thickness of 0.7-0.8 mm. The main ...

    • Behavior of Ni/al2O3 Nanocomposite Thin Layers in Corroding Environment 

      Gheorghieș, c.; Gheorghieș, Livia; Atanasiu, V.O. (Universitatea "Dunărea de Jos" din Galați, 2009)
      This paper investigates the effects of adding alumina nanoparticles in the electrolyte bath on surface topomorphologies and structure of electrodeposited nickel. The influence on the corrosion process in NaCl solutions ...

    • Behavior of Refractories in Interaction with Metallurgical Slag 

      Potecașu, Florentina; Muntean, Marcela; Ivan, Mariana (Universitatea "Dunărea de Jos" din Galați, 2012)
      The aim of this paper is to present the studies concerning behavior of the refractory to metallurgical slag corrosion. The corrosion resistance at high temperatures using the static method on samples containing chamotte ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Behaviour at Nitriding in Fluidized Layer of Austenitic Stainless Steels at the Temperature 

      Dima, Ovidiu (Universitatea "Dunărea de Jos" din Galați, 2007)
      Nitriding at low temperatures, 450-500oC of austenic stainless steels lead to the obtaining of the tough layers over 1000 HV005 but having thicknesses of tenths of microns. Moreover, nitriding at 500ºC has determined the ...

    • Behaviour at Nitriding in Fluidized Layer of Austenitic Stainless Steels at the Temperature of 450°C 

      Dima, Ovidiu (Universitatea "Dunărea de Jos" din Galați, 2007)
      Stainless austenitic steels have a good corrosion resistance but reduced abrasion strength due to low strength below 200HV5. By nitriding one may ensure the obtaining of a superficial layer with increased strength that ...

    • Behaviour of Some Important Components in a cold Rolling Mill 

      Dragomir, Ştefan; Dragomir, Georgeta; Bordei, Marian (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      For a good behaviour of mill parts and accurate functioning it is necessary to have an integrated system for all mill tandem. It is important to know the speed controls and strip tension in correlation with torque, ...

    • Behaviour of the Mobile Phones Owners Relating to the Management of Theyr Devices 

      Ciocan, Anișoara (Universitatea "Dunărea de Jos" din Galați, 2015)
      Today mobile phones have become apparently indispensable. They are the most used electronic devices in the world. The useful life of a mobile handset is decreasing; life cycle is diminished as a result of the speed of ...

    • Calculation of the Deposited Layer Thickness Through Side Injection of Powder Using CO2 Laser 

      Boiciuc, Simona; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galați, 2017)
      The paper presents a simplified theoretical model for estimating the operating parameters of the laser deposition by injecting the powder into the metal bath. The study considered the influence of the powder particles ...

    • Calibration and Reference Blocks Used in Nondestructive Ultrasound Examination, According to New European Union Requirements 

      Stanciu, Cristian; Petrea, Ionel (Universitatea "Dunărea de Jos" din Galați, 2006)
      Pursuant international standards such of the European ones, the nondestructive examinations have to be worked out by the most possible accuracy and repeatability, that allow the difference making between the admitted ...

    • Cellular Automata Method Studyng Recrystallization Process 

      Anăstăsoaie, Vasile; Gheorghieș, Constantin (Universitatea "Dunărea de Jos" din Galați, 2013)
      A cellular automaton is a decentralized computing model providing a platform for performing complex computation with the help of only local information. The cellular automata method describes the evolution of a ...

    • Challenges in Corrosion Protection using Vegetable Extracts as Inhibitors-Electrochemical Studies 

      Benea, Lidia; Dănăilă, Eliza Mardare; Bounegru, Iulian (Universitatea "Dunărea de Jos" din Galați, 2014)
      Corrosion is an irreversible chemical or electrochemical reaction of a material with its surrounding environment or medium which results in consumption of the material or in dissolution into the material of a component ...

    • Characterisation of CVD Niobium Carbine Coatings on Hard Carbide Substrate 

      Constantinescu, Stela; Vlad, Maria; Radu, Tamara (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Hard coatings are often used for mechanical properties such as wear and friction resistance. The corrosion behaviour may also be an important criterion for industrial applications of these coatings. In this paper, the ...

    • Characterization of Archaeological Objects Coming from Moldovian Settlements in the XIV Century 

      Potecaşu, Mihaela; Bordei, Marian (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      This paper presents the characterization, from the materials science point of view, of an object found in an archaeological vestige of the 14th century. The object studied (an iron nail used in constructions) proves that ...

    • Characterization of Dental Metals and Alloys 

      Vasilescu, Elisabeta; Vasilescu, Vlad-Gabriel; Nicolau, Alexandru Mircea (Univesitatea "Dunărea de Jos" din Galați, 2013)
      Metals and alloys in dentistry have seen remarkable progress due to their biocompatibility and deepen research on the application of advanced technologies to improve surface properties by controlling interactions material ...

    • Characterization of Iron and Low Alloy Steel Powders Obtain by Water Atomization 

      Drugescu, Elena; Marin, Mihaela; Silva, Rui (Univerversitatea "Dunărea de Jos" din Galați, 2009)
      Three types of iron and low ally steel powders were investigated to determinate their physical properties and surface morphology by SEM analysis. The powders were obtained by water atomization. The first type of powder ...

    • Characterization of Sintered Hardmetals Coated with Tic 

      Constantinescu, Stela; Orac, Lucica (Universitatea "Dunărea de Jos" din Galaţi, 2013)
      This paper presents the realization of TiC thin films by CVD method. The thin layers of TiC thicknesses were 8 and 10μm, their thickness increasing with time, keeping the temperature. Diffractometer analysis certifies ...

    • Characterization of Thick Hard Layers with ni-Cr-B-Fe-Al Alloy Obtained by Laser Cladding 

      Drugescu, Elena; Boiciuc, Simona; Gheorghieș, Constantin (Universitatea "Dunărea de Jos" din Galați, 2009)
      To increase the resistance to wear and corrosion of the surface layers made from steel with 0.45% C, multilayer deposition was tested by injection of powder with chemical composition of 8.9% Cr, 4.5% Fe, 5.1% B, 2, 4% ...