Căutare după Autor "Cazacu, Nelu"

Afișează articolele 1-11 of 11

    • Behavior of 1% Cr Steels at Fluidized Bed Nitrocarburizing 

      Dobrovici, Sorin; Cazacu, Nelu; Bâclea, Adolf; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2005)
      Paper is based by nitrocarburizing experiments made on pilot installation. For experiments were used different samples of steel at different nitrocarburizing regimes. Influence factors were: temperature and ammonia ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Nanostructured Surface for 38MoCrA109 Steel by Nitriding in Nitrogen Atmosphere and Yag;Nd Pulse Laser Activation 

      Cazacu, Nelu; Pintilie, Cătălin; Dobrovici, Sorin; Bâclea, Adolf (Universitatea "Dunărea de Jos" din Galați, 2008)
      YAG:Nd pulse laser is usually used for cutting and welding. The paper is based by experiments using YAG:Nd pulse laser (KVANT 17-CIS made). Technological modules were assembled for laser beam deviation and for relative ...

    • 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 ...

    • Quality Engineering Procedures Applied to Determine the Weight of Influence of Factors on Microtrigeneration Systems (mCCHP) 

      Cazacu, Nelu; Badea, Nicolae; Dobrovici, Sorin (Universitatea "Dunărea de Jos" din Galați, 2009)
      Microtrigeneration systems are characterized by simultaneous generation of power, heat and cold for small applications (<50kW) and are designed for reducing GHG and other emission degreases. The cooling generation by ...

    • 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 ...

    • 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 ...