Căutare 1993 -2018 după Data publicării
Afișează articolele 1-20 of 552
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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 ... -
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 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 ... -
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 ... -
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. -
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 ... -
Aspects Regarding the Atmosphere Pollution Monitoring
(Universitatea "Dunarea de Jos" din Galați, 2005)This paper presents information regarding the variation of aerosols concentration in a central area in Galati city. For a period of time of 2 years and 5 months, there have been done correlations between aerosols ... -
Possibilities to Study the Mixing State and Energy Dissipation in Metallurgical Reactors Using a System Based on Coloured Liquids
(Universitatea "Dunărea de Jos" din Galați, 2005) -
Nanostructured SiC-Ni Composite Coatings Obtained by Electrodeposition-a Tribocorrosion Study
(Universitatea "Dunărea de Jos" din Galați, 2005)The tribocorrosion properties of SiC (20nm) - Ni nanostructured coatings have been studied in pin on disc tribocorrosimeter connected with an electrochemical cell. The objectives of our study in principal is to fully ... -
Laser Cladding of Ni-Cr-B-Fe_Al Alloy on a Steel Support
(Universitatea "Dunărea de Jos" din Galați, 2005)Multilayer coating by injection of powder with 8.9% Cr, 4.5% Fe, 5.1% B, 2.4% Al, 0.6% Cu; all reminded of Ni, as chemical composition, in melted bath by CO2 continuous wave laser connected to x-y-z coordinate table was ... -
Coatings Systems: Chromium Carbide, Nitride and Carbonitride
(Universitatea "Dunărea de Jos" din Galați, 2005)The process of the chemical deposition from vaporous implies the adsorption of the mobile atoms (monomers) on the substrate surface, their migration with embryos and stable nucleus formation, followed up by further growth ... -
Estimation of the Metallurgical Industry Impact on the Environment
(Universitatea "Dunărea de Jos" din Galați, 2005)Objectively, the ecosystem in its development and working implies the accumulations on of some nonconcordances. Summing these disfunctions without taking into consideration their attenuation, may lead to producing, achieving ... -
A Researches for the Determination of the ATC Si10Mg Alloy Fatigue Life, function of Different Applied Thermal Treatment Cycles
(Universitatea "Dunărea de Jos" din Galați, 2005)The experimental researches which were made, emphasized the opportunity of applying heat treatment cycles, in order to increase fatigue life of ATC Si 10 Mg alloy. The increase of minimum fatigue resistance is approximately ... -
A New Vision About the Dimensioning Calculus for the Frame of the Cold Mill Machine
(Universitatea "Dunărea de Jos" din Galați, 2005)Dimensioning calculus for a rolling mill machine frame, using resistance classical methods allows determines the introduction of errors .For to do a better precisely of calculus we propose to use “Finish Elements Method”. ... -
Analytical Model of Forge Cutting Process with Asymmetrical Tools
(Universitatea "Dunărea de Jos" din Galați, 2005)In this paper is developed the theory of forge cutting process feasible with asymmetrical tools. The asymmetrical cutting process is different of the symmetrical cutting process. This type of process is necessary to ... -
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 ...
