1993 -2018: Recent submissions
Afișează articolele 61-80 of 552
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Electrochemical Deposition and Sem Surface Morphology of Co and UHMWPE/Co Composite Layers
(Universitatea "Dunărea de Jos" din Galați, 2009)The work aims at obtaining composite coatings in cobalt matrix with dispersed phase UHMWPE (ultra high molecular weight polyethylene) and at characterizing the surface morphology analyse by SEM, the thickness of the ... -
Cladding by Welding with Hard Alloys
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents the results of a research on the role of cladding by welding support of continuous casting plant. Emphasizing that plating leads to outer layer the study presents a complex of properties favorable for ... -
Experimental Researches Concerning the Influence of the Oxynitrocarburizing Thermochemical Treatment Over the Structure and Corrosion Resistance of C40 Steel
(Universitatea "Dunărea de Jos" din Galați, 2009)The aim of the paper is to present the results of the experimental researches regarding the corrosion behaviour of C40 steel, thermochemical treated by oxidant nitrocarburizing at 570°C. The thermochemical treatment was ... -
Studies Regarding Nickel Electrodeposition from Watts bath with Addition of Polyvinylpyrrolidone and Sodium Saccharine
(Universitatea "Dunarea de Jos" din Galați, 2009)This paper is based on some studies about the influence of polyvinylpyrrolidone (PVP) and sodium saccharine as far as concern their influence on the nickel electroplating processes from Watts bath. PVP is a wetting ... -
Utilisation of Electrochemical Methods for Characterization of Some Corrosion Inhibitors for Steel and Copper
(Universitatea "Dunărea de Jos" din Galați, 2009)The effect of chromate and molybdate on the corrosion inhibition of copper and steel has been investigated in two eutectics solution at room temperature. We used stationary electrochemical methods and optical microscopy ... -
Study Regarding Gravimetrical Corrosion of the Superficial Layers Obtained Through Electrical Discharge
(Universitatea "Dunărea de Jos" din Galați, 2009)The experimental research was made on superficial layers laid-down through electrical sparking on the steel carbon OLC 45 probes, the used electrode being made from a corrosion resistant material (Copper). The probes ... -
Analysis of Titanium Inteface and Tungsten Exterior layer Thickness Coated by Vibrator Electrode Method
(Universitatea "Dunărea de Jos" din Galați, 2009)The goal of this paper is to create metallic materials with superior functional performances. The layer obtained by electrode vibrator method must have a very good adherence on part surface and a high chemical and thermal ... -
Characterization of Thick Hard Layers with ni-Cr-B-Fe-Al Alloy Obtained by Laser Cladding
(Universitatea "Dunărea de Jos" din Galați, 2009)To increase the resistance to wear and corrosion of the surface layers made from steel with 0.45% C, multilayer deposition was tested by injection of powder with chemical composition of 8.9% Cr, 4.5% Fe, 5.1% B, 2, 4% ... -
EDX Analysis of Laser Cladding Layers with Ni-Cr-B-Fe-Al Alloy
(Universitatea "Dunărea de Jos" din Galați, 2009)Multilayer cladding by injection of powder with 8.9% Cr, 4.5% Fe, 5.1% B, 2.4% Al, 0.6% Cu, Ni rest as chemical composition, in melted bath by a continuous wave CO2laser connected to x-y-z coordinate table was tested in ... -
Researches Regarding Temperature Influence on Classic and Synthetic Quenching Medium
(Universitatea "Dunărea de Jos" din Galați, 2009)In this paper were analyzed experimental graphics for quenching cooling curves of oil at 20°C,40°C,60°C, 80°C and carboxymethyl cellulose (CMC) 1,5% solution in water at the same temperatures. Velocity cooling was studied ... -
Elements of Drawing Theory and Technology of the High Mechanical Strength Wires in Ultrasonic Field
(Universitatea "Dunărea de Jos" din Galați, 2009)In the paper are presented elements of drawing theory and technology of the high mechanical strength wires, when the auger die is located in the maximum of the waves oscillation and it is activated on drawing direction. ... -
Improving of Functional Parameters for Pressure Casting Machine with High Degree of Finishing
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents a mathematic model of static and dynamic characteristics for casting machine. This machine has a hydraulic action for the casting chamber (her closing and introducing of molten alloy). This action is ... -
The Assessing of Mechanical Characteristics of the Steel Sheets Designed for Drawing for a Five-Month-Period as an Effect of Natural Ageing
(Universitatea "Dunărea de Jos" din Galați, 2009)In the paper it is presented a study run on a five-month-period regarding the changes in the mechanical characteristics due to natural ageing for a drawing steel, cold rolled, unalloyed with 0.04% C. The ageing tendency ... -
Redesigning a Jaw Crusher Using Value Analysis Part I
(Universitatea "Dunărea de Jos" din Galați, 2009)Value Analysis (VA) is a method that provides an operating technique using a creative and organized approach. It is managed by a group, each of them selected according their expertise in specific subjects and coordinated ... -
Experimental Studies Regarding the Implementation Possibilies of a Quality Control System for Ceramic Products in Continuous Flux Production
(Universitatea "Dunărea de Jos" din Galați, 2009)In the current paper the authors studied the possibilities and limitations of a system intended to evaluate the quality of ceramic products directly on the production line. The system is based on a data mining specific ... -
Study of the Sintering Process of Iron Powders Coated with Nano-Hydrocarbon and the Resulting Microstructure at Temperatures up to 1200°C
(Universitatea "Dunărea de Jos" din Galați, 2009)The objective of the research is development and study of a new ecologically friendly and technologically advanced method for introduction of carbon during sintering of low alloyed iron powders ASC 100.29. The method is ... -
Researches on the Viscoplastic Behavior of a CrMo Alloyed Steel
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper shows the results of the researches concerning the deformation behavior of alloyed steel with chromium and molybdenum. The plastic deformation behavior is researched in the experimental way, using the torsion ... -
Heavy Metal Ions Cu (II), Co (II) and Cr (III) bufunctionally Improved with Hydroxamic and Amidoxime Groups Chelating Ion Exchangers
(Universitatea "Dunărea de Jos'' din Galați, 2009)Two new types of bifunctional chelating ion exchangers on the basis of ethylacrylate acrylonitrile: divinylbenzene copolymers with hydroxamic acid and amidoxime groups have been evaluated for Cu(II), Co(II) and Cr(III)ions ... -
Critical Analysis of "Maximum Stress Failure"
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper deals with critical considerations upon different points of view that were enounced by some authors referring to Maximum Stress Failure Criterion for composite materials. The considerations stem both from a ... -
Physical-Chemical Properties (Cu-Sn) -Mo Composite Materials
(Universitatea "Dunărea de Jos" din Galați, 2009)The article is devoted to the study of corrosive and thermal stability of materials composition on the basis of copper, obtained by the EB-PVD method. It is shown in this work that corrosion of (Cu-Sn)–Mo composites have ...
