Listar 2005 fascicula9 nr2 por fecha de publicación
Mostrando ítems 1-20 de 22
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Establishing of Rolling-Friction Coeffocient, for Hertzian Contacts Between Steel Balls and Different Kinds of Thermochemical Treated Steel Surfaces
(Universitatea "Dunărea de Jos"din Galați, 2005)It is known that for the ball displacement guide paths, the necessary startmoving force of the mobile half-couple is higher than the displacement-motion keeps force.Within the frame of this work, it has been designed and ... -
Kinetic of Nitroso R-Salt Sorption on Amberlite IRA 402 Resin
(Universitatea "Dunărea de Jos" din Galați, 2005)The sorption of nitroso R salt from aqueous solution by ion exchange resins, such as AMBERLITE IRA 402 (Cl- form) , is described. The experimental data have been analyzed by using the sorption kinetics for a first-order ... -
Influence of Atmospheric Conditions on the Mechanical Properties of Pet Rubber Composites
(Universitatea "Dunărea de Jos" din Galați, 2005)The aim of paper is to study the influence of environmental open air conditions on the PET-rubber composites. Two set of samples (Type I, Type II) were obtained with the same composition, but the composites of Type I are ... -
Chemical and Structural Changes for Bimetallic Materials Obtained by the Welding Process
(Universitatea "Dunărea de Jos" din Galați, 2005)This paper presents the transformations which take place during the obtaining process of bimetallic materials. As a plating process was used the welding. The added material was a bronze with aluminum complex alloyed with ... -
Laser Surface Hardening of 51Crv4 Steel
(Universitatea "Dunărea de Jos" din Galați, 2005)The work presents the surface changes in microstructure and properties by quenching the 51CrV4 steel from liquid and solid phase, using a CO2 continue laser wave with 900W power. In order to determine the hardening ... -
Reasearches Regarding Structural Changes Due to Nickel Microlalloying of Hot Galvanizing Baths
(Universitatea "Dunărea de Jos" din Galați, 2005)This work offers a synthesis of researches performed in laboratory and regards the nickel microalloying of hot galvanizing baths. Experiments followed the structural changes of both hot galvanizing bath and deposed layer ... -
The Actionnary System of the Continnous Discharge Furnace from L.T.G.-1. Mittal Steel
(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, ... -
Modelling of the Flow and Deformation Fields at teh Profiles Rolling by Field Lines Method
(Universitatea "Dunărea de Jos" din Galați, 2005)This paper presents a method for modeling of the rolling process based at the deformable continuous medium mechanics, the theory of field lines. The rolling of the profiles and plates may be evaluated as the plane strain ... -
Mathematical Model of the Strip Rolling Made of the Sinterized Metallic Powders
(Universitatea "Dunărea de Jos" din Galați, 2005)The minimum-power method has been used to investigate the final ratio soft-layer thickness to tough-layer thickness in bimetals with porous layer rolling. The velocity fields has been determined and the total deformation ... -
Laser Cladding of High-Speed Steel on a Steel Support
(Universitatea "Dunărea de Jos" din Galați, 2005)Multilayer cladding by injection of high-speed steel powder with 0.82%C, 4.7%Mo, 6.4%W, 4.1%Cr, 2.02%V, 0.3%Mn, as chemical composition, in melted bath by CO2 continuous wave laser connected to x-y-z coordinate table was ... -
Aspects Regarding the Widia Plates Behaviour Covered with TiN During the Cutting Process
(Universitatea "Dunărea de Jos" din Galați, 2005)The microscopic property that depends on the interfacial structure and on the tension to which the interface is submitted is called adherence. The strong connection in the interfacial area, low tension gradients, the ... -
The Value of the Structural Remanence and Thermic Tensions in the Forged Pieces
(Universitatea "Dunărea de Jos" din Galați, 2005)The plastic deformation, the heating and the cooling of the pieces submitted to plastic deformations acumulate remanent tensions inside the pieces. Knowing the environmental where they are produced and avoiding its ... -
Behavior of Rp3-High Spped on Short Time Nitriding in Fluidized Bed
(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 ... -
Physico-Mechanical Characteristics of Hard Alloys Made Out of Many Carbides
(Universitatea "Dunărea de Jos" din Galați, 2005)The Hard alloys of type WC-TiC-Co can be used to process materials with long chips, such as steels [1]. Titanium carbide or TiC-WC solid solutions, added as alloying constituents in the compositions of WC-Co pseudo-alloys ... -
Corrosion Resistance of the Composition Materials System (Cu-Al)-Mo, Obtained by the EB-PVD Method
(Universitatea "Dunărea de Jos" din Galați, 2005)For development of new composition materials for the electric contacts, which would differ by high electric conductivity, mechanical properties, corrosive and erosion resistance in conditions of high temperature’s ... -
Experimental Reaearch of Sintered Porous Materials of Bronze Powders
(Universitatea "Dunărea de Jos" din Galați, 2005)Porous sample were fabricated by sintering of bronze ( Cu Sn10) with different particle size range. The paper investigates the influence of the particle size distribution, temperature and sintering time on the structural ... -
The Computation of the Calended Rolls Deflection Using the Stone-Gaevski Formulae
(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. -
Researches Regarding Improvement of the Fatigue Limit by Heat Treatments of the Al-Alloys for Aeronautics Industry
(Universitatea "Dunărea de Jos" din Galați, 2005)The laboratory experiments were made on the two aluminium alloyed qualities used for aeronautical industry. The structure and mechanical characteristics were analyzed and the gotten results were compared using those two ... -
Researches Concerning the Correlation of the Semiplanetary Rolling Process Factors
(Universitatea "Dunărea de Jos" din Galați, 2005)An available solution of the elimination of the superficial cracks network at the continuous cast slabs is the semiplanetary rolling. The application of a semiplanetary rolling mill at the exit of slab from the curve zone ... -
Researches Regardingbthe Thermomechanical Treatments Influence on the Structure and Characteristics of the Aluminium Alloys for Aeronautics
(Universitatea "Dunărea de Jos" din Galați, 2005)The laboratory experiments were made on the two aluminium alloyed qualities used for aeronautical industry. More working conditions of the intermediary (PTMI) and finally (PTMF) thermomechanical treatments were used on ...
