Căutare Fascicula IX după Titlu

Afișează articolele 453-472 of 552

    • Superior Valorisation of the Aluminium Scraps for Obtaining Complex Aluminium Master Alloys Used in Advanced Refining of the Steels 

      Ciocan, Anișoara (Universitatea "Dunărea de Jos" din Galați, 2009)
      The research about aluminium scraps valorisation to obtain master alloys with reactive elements (Al, Mn, Si) used for special steels refining is presented in this paper. By this way the recycling of aluminium scraps leads ...

    • Surface Hardening by Nitration for Some Stainless Austenite Steel Types 

      Dima, Ovidiu; Cazacu, Nelu (Universitatea "Dunărea de Jos" din Galați, 2006)
      Stainless austenite steel types have a good resistance to corrosion in different natural, industrial environments but their hardness and mechanical resistance are low enough. In order to assure an increased resistance ...

    • Surface hardening for Low Carbon Steel (A3k) by Yag: Nd Pulse Laser Thermal Activation 

      Cazacu, Nelu; Sava, Liliana; Dobrovici, Sorin; Baclea, Adolf (Universitatea "Dunărea de Jos" din Galați, 2008)
      The paper is based on experiments for surface hardening on A3k (low carbon steel) samples using YAG:Nd pulse laser. A small x-y moving system conducted by PC was made for sample scanning, relative to fixed focused laser ...

    • 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 ...

    • Surface Hardening Over 38MoCrA109 Steel by Yag:Nd Pulse Laser 

      Dobrovici, Sorin; Cazacu, Nelu; Sava, Liliana; Baclea, Adolf (Universitatea "Dunărea de Jos" din Galați, 2008)
      Laser offers unique capabilities for high energy concentrations at small surfaces. Factors that have influences over interactions between laser beam and steel surfaces have very high control. Pulse laser YAG:Nd is usually ...

    • Surface Hardenining for 38MoCrA109 Steel Using Fluidized Bed Nitriding 

      Baclea, Adolf; Dobrovici, Sorin; Cazacu, Nelu (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      The paper is based an nitriding experiments made in a fluidized bed laboratory furnace. Fluidization was obtained in a steel refractory retort by solid granular (burned fire clay) and fluid (mixture of ammonia and ...

    • Surface Tension of Liquid Copper in Dilute Oxygen Concentrations 

      Vlad, Maria; Vasilescu, Elisabeta (Universitatea "Dunărea de Jos" din Galați, 2006)
      The studies of this paper regarding the influence of low oxygen contents on the liquid copper surface tension had as base „sessile drop” method and the determination of the oxygen content using calculation ratio where ...

    • Surfasce Roughness and Topography of Ni/Micro-Sic Layers: Influence of Current Density on Electrodeposition Process 

      Ciubotariu, Alina; Benea, Lidia; Sand, Wolfgang (Universitatea "Dunărea de Jos" din Galați, 2015)
      The surface properties are directly responsible for the performance of engineering materials because most of failures such as friction, wear, corrosion and fatigue often take place on the material surface. Electrodeposition ...

    • Synthesis and Characterisation of Ag/SnO2/Clay Nanocomposites with Potential Application as Photocatalysts 

      Hristodor, Claudia-Mihaela; Tănase, Diana; Vrînceanu, Narcisa; Copcia, Violeta-Elena; Pui, Aurel; Popovici, Eveline (Universitatea "Dunărea de Jos" din Galați, 2012)
      This work reported a novel synthesis and characterization of Ag/SnO2/clay nanocomposites. The obtained materials were characterized using techniques such as X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy, ...

    • A test for Rapid Tribological Characterization of Bearing Steels 

      Gheorghieș, Constantin; Buciumeanu, Mihaela; Scarpete, Dan; Gheorghieș, Livia; Bold, Dorian (Universitatea "Dunărea de Jos" din Galați, 2012)
      In this paper is a study the influence of the material and heat treatment on the changes of the fine structure parameters of the superficial layer of triboelements during the first cycles of rolling contact process. The ...

    • The Action of the Ultrasonic Vibration Over the Diffusion Process in Gases and Liquids 

      Ciurea, Aurel; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2007)
      Among the new method of studying the properties of the substance and the influence over the most various physical and chemical processes, used in different industrial domains, the main place is occupied by the usage of ...

    • 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, ...

    • The Analysis of a Workplace from an Ergonomically Criterion. Case Study: Preliminary Charge 

      Vasiliu, Adrian; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2013)
      This paper presents a practical method of analyzing a wokplace from an ergonomically criterion based on an "ergonomic analysis questionnaire", and, also, the conclusions and proposed measures in order to improve the ...

    • The Analysis of the Breaking Susceptibility of Some Feritic Stainless Steel 

      Bordei, Marian; Ciurea, Aurel (Universitatea "Dunărea de Jos" din Galați, 2007)
      The growth of the world stainless steel conumption was the result of some new domains development, of some demands and special conditions undercooling not only the adaptability of this alloy but also the remarcable range ...

    • The Assessing of Mechanical Characteristics of the Steel Sheets Designed for Drawing for a Five-Month-Period as an Effect of Natural Ageing 

      Potecașu, octavian; Potecașu, Florentina; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2009)
      In the paper it is presented a study run on a five-month-period regarding the changes in the mechanical characteristics due to natural ageing for a drawing steel, cold rolled, unalloyed with 0.04% C. The ageing tendency ...

    • The authentification of Old Bronze Coins and the Structure of the Archaeological Patina 

      Sandu, Ion; Diaconescu, Florin; Sandu, Ioan Gabriel; Alexandru, Adrian; Sandu, Andrei Victor (Universitatea "Dunărea de Jos" din Galați, 2006)
      This paper presents comparative results concerning the chemical composition and mineralogical distribution of the main compounds from the structure of the archaeological patina of ancient bronze coins, which were determined ...

    • The behaviour of Acid Slag in the Tundish 

      Ittu, Sînziana; Mogoș, Paul Petruș (Universitatea "Dunărea de Galați, 2013)
      In the tundish, purification of steel is given by the use of an oxide powder on the steel surface. This powder perform several important functions, such as thermal insulation, protection against liquid steel surface ...

    • The Chemical and Metallurgical Analysis of Cooper-Based Shape Memory Alloys 

      Achiței, Dragoș Cristian; Minciună, Mirabela Georgiana; Vizureanu, Petrică (Universitatea "Dunărea de Jos" din Galați, 2015)
      The paper presents some aspects on the thermo-mechanical fatigue of shape memory alloy, a documentary synthesis of their industrial applications and chemical aspects concerning the use of these alloys in biomedical applications

    • 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.

    • The Consequence of Heavy Metals Impact on Primary Teeth 

      Zmarandache, Diana Daniela Daciana; Stanciu, Ioana-Andreea; Luca, Rodica; Farcaşiu, Cătălina (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Since the metals deposited in the teeth during formation and mineralization processes are to a large extent retained, human teeth receive a considerable attention as indicators of heavy metal exposure. The objective of ...