Căutare 2014 fascicula9 nr4 după Titlu

Afișează articolele 7-16 of 16

    • Fabrication of Ultrafine Low Carbon Metallic Multilayer by Accumulative Roll Bonding 

      Gurău, Carmela; Gurău, Gheorghe; Gurău, Lidia; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The effect of grain refinements by Accumulative Roll Bonding (ARB) was investigated on low carbon steel. Optical microscopy (OM) and microhardness tests were used to check the phase changes and hardness before and after ...

    • Funcţional Model of Savonius Type Vertical Axis Wind Turbine With Periodic Coupling of Adjacent Vertical Blades 

      Cazacu, Nelu; Lucaci, Cătălin Bogdan (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The field of HAWT (Horizontal Axis Wind Turbines) regarding the use of wind energy (WE) as a renewable energy source (RES) is well researched and the results are covering both the power range and efficiency. Deficiencies ...

    • Improving Slab Quality Through Control of Cooling Parameters in Continuous Casting Plants 

      Bordei, Marian; Dragomir, Ştefan (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      Coupling the continuous casting installations with the rolling ones is a modern process that brings considerable economic benefits. During the continuous casting process of steel slabs, necessary technological conditions ...

    • Influence of Cooling Oil on the Surface Quality of the Roller Strip 

      Radu, Tamara; Constantinescu, Stela; Potecaşu, Florentina (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The excess of emulsion used in the lamination process leads to the formation of drops which in the annealing process forms spots of burned emulsion. It was also shown to cause formation areas with high carbon concentrations ...

    • Metal Heating Furnace with Flue Gas Condensation. A Thermoeconomic Analysis 

      Pană, Daniela; Drăgan, Marcel; Ion, V. Ion (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The heat treating furnaces are one of the largest energy consumers in the manufacturing sector and therefore many techniques to improve their energy efficiency have been developed. One of them focuses on the recovery of ...

    • Microstructural Characteristics of Sintered Powder Metallurgy Alloys 

      Marin, Mihaela; Potecaşu, Florentina; Potecaşu, Octavian (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The purpose of this paper is to study the influence of processing parameters on the microstructural characteristics of sintered powder metallurgy alloys. The specimens were produced from atomised iron powders with different ...

    • Policies for Economic Efficiency. Providing utilities in Public Administration 

      Simionescu, Aurel Gabriel; Dragomir, Mariana Carmelia (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The reality of the contemporary world has shown that there is an increasing interdependent power often turned into political pressure. Today, in Europe 25% of the imports of natural gas come from Russia. Therefore, ...

    • Study on Refractory Material Used Forthe Wear Laver of the Tundish 

      Tudor, Beatrice (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The continuous casting of steel is a modern and efficient process for the production of semi-finished products required for the other components of steel industry. In order to improve the quality of continuous cast slebs ...

    • Study on the Rheology of Corn Oil Subjected to Forced Oxidation 

      Şolea, Liviu Cătălin; Creţu, Romică (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      This paper reflects a study on the rheology of corn oil in unoxidized state, subjected to forced oxidation treatment. Using the Rheotest2 system, the variation of dynamic viscosity with temperature and shear rate, using ...

    • Superficial Hardening with Pulse Laser Applied to ASTM A537 HSLA Steel 

      Cazacu, Nelu; Vrabie, Bogdan Silviu (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The surface hardening with YAG:Nd pulse laser is used to obtain a set of surfaces with different properties and it is based on the formation of a very fine martensite. The paper has been elaborated based on laboratory ...