Fascicula IX: Recent submissions
Afișează articolele 221-240 of 552
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Influence of Steel Modification Allied with 4-7%Si on Macrostructure
(Universitatea "Dunărea de Jos" din Galați, 2006)The goal of this paper is to test the effect of odification process of liquid steel with 4-7% silicon content, in the course of pouring out from steel-smelting furnace into ladlet, on macrostructure. The research settled ... -
The Correlation Between Mechanical Characteristics and Technological Parameters in Heat Treatments Applied to Moulding Aluminium Like at Si5Cu1
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper contains an experimental study of colligating the technological parameters of the artificial aging operation namely time and soaking temperature with hardness and mechanical strength properties gained after the ... -
Mercury Determination from Incidentally Polluted Waters by Collecting Gravimetry in Organic Stage Method
(Universitatea "Dunărea de Jos" din Galați, 2006)Determination of mercury in incidentally polluted waters, presented in CALIST Program, was carried out using tiobis-β-naphthol as a reagent. The method proposed for mercury determination, named “collecting gravimetry in ... -
Improved Hardness and Tribocorrosion Properties of Nickel Coatings By Co-Depositing ZrO2 Micro-Sized Dispersed Phase During Electroplating Process
(Universitatea "Dunărea de Jos" din Galați, 2006)The tribocorrosion properties of ZrO2 – nickel microstrucured composite coatings have been studied in the following conditions: -Solution: 0.5M K2SO4 -Tribo corrosimeter: pin on disc connected with electrochemical ... -
Jassy Achievements Regarding the Casting of Art Pieces for Artificial Lighting in Orthodox Churches
(Universitatea "Dunărea de Jos" din Galați, 2006)In this paper are presented some art pieces, used in orthodox religion for artificial general lighting. These pieces, realized at SC RANCON SRL Jassy, present a special importance, because they join harmoniously the ... -
The Structural Optimizing of Metallurgical Installations and Mechanisms
(Universitatea "Dunărea de Jos" din Galați, 2006)The structural optimizing of used mechanisms in the machines construction and metallurgy through the further liberty degrees creation is essential projection problem, as it enters the closing mechanisms case with sliding ... -
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 ... -
The Use of Systems Analysis in Environmental Engineering
(Universitatea "Dunărea de Jos" din Galați, 2005)The depletion of energy resources has been of primary concern in the `70s and `80s. In recent years, the decline of the environment due primarily to our energy-related activities has become severe and raises serious ... -
Researches Regarding the Rolling of the Sinterized Metallic Powders Strips
(Universitatea "Dunarea de Jos" din Galați, 2005)This paper work is distinguishing the size modification of those two material layers gotten by the bimetallic strip rolling, joined by the sintering. The iron powders sediment was achieved on the steel strip backing. ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 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. -
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 ... -
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 ...