Fascicula IX: Recent submissions
Afișează articolele 181-200 of 552
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The Decreasing of the Energetic Losses at a Coke Cooling Plant
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper presents an energetic and technologic analysis of the metallurgic coke dry cooling plant (CDCPO) operating, and also the optimization of this process in the case of an industrial plant, existing in the Steel ... -
Behavior of Some Stainless Nitrided Austenite Steel Types to Corrosion and Abrasion
(Universitatea "Dunărea de Jos" din Galați, 2006)By nitriding, stainless austenite steel types can become surface hardened. Hardness can be greater at more than 1000 HV005 when the composition layer made of complex nitrides is obtained and more reduced till 500 HV005 ... -
Behavior of 1%Cr Steels at Fluidized Bed Nitrocarburizing
(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 ... -
Kinetic of Martensite Transformation in a Cu-13wt. %Al-4 wt.%Ni Shape Memory Alloy
(Universitatea "Dunărea de Jos" din Galați, 2006)In this paper we present some results was obtained on the Cu-13wt. %Al-4 wt. %Ni shape memory alloy. This alloy was elaborated by a classic melting method starting at pure metals. A DSC analysis was made for quenched ... -
Studies Regarding the Cooling of the Rolled Pieces With Atomizing Water
(Universitatea "Dunărea de Jos" din Galați, 2006)The diversity of metallurgical materials and processes imposes a large scale of cooling speeds. The classical cooling mediums restrict the scale of the cooling speeds, reason for which nonconventional alternatives were ... -
Study of Tribocorrosion Processes by Electrochemical Techniques
(Universitatea "Dunărea de Jos" din Galați, 2007)Tribocorrosion is defined as the chemical-electrochemical-mechanical process leading to a degradation of materials in sliding, rolling or erosion contacts immersed in a corrosive environment. That degradation results ... -
Implications of Thermal and Thermo Chemical Treatments in Electrolytic Plasma on the Phasic Composition of Steels 40Cr10 and OLC 55
(Universitatea "Dunărea de Jos" din Galați, 2007)The X-ray diffraction researches allowed the identification of the phases present in the structure of steels 40Cr10 and OLC 55, treated thermally and thermal-chemically in electrolytic plasma and the calculation of ... -
Contribution of Heat and Thermochemical Treatments to the Improvement of the Perfomances of High-Speed Steel Tools
(Universitatea "Dunărea de Jos" din Galați, 2007)The In this paper the influence of non-conventional heat and thermo chemical treatments upon the structure of tool steels and implicitly, upon the performances that are derived from applying such treatments, is presented. ... -
Some Issues Concerning Gear Wheels Fabrication by Sintering
(Universitatea "Dunărea de Jos" din Galați, 2006)Powder metallurgy appeared in the XVIII century as result of industrial market demand for electric bulbs filaments made of wolfram. Nowadays powder metallurgy is applied in such fields as: automotive industry (cylindrical ... -
Tribolological Behaviour of Nitrocarburized Superficial Layer After Thermo-Magnetic Treatments Applied to Steels, During Friction Process
(Universitatea "Dunărea de Jos" din Galați, 2006)Two types of steels subjected to a nitrocarburized thermo-chemical treatment after thermomagnetic treatments. The contact problems are studied employing the concept of tribosystem and tribomodel. The structural aspects ... -
Art Pieces Casting from Brass, Destined to Artificial Local Lightening, Used in Orthodox Cult
(Universitatea "Dunărea de Jos" din Galați, 2006)In this paper are presented some realizations from SC RANCON SRL Iasi, which regards the casting of lighting local parts from brass, used in orthodox religion. Thus is highlighted the relationship between functionality, ... -
Study of the Inclusions from the Oriented Grains Silicon Steels and Their Influence on the Texture
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper presents experimental results concerning the inhibitor phases generation by microalloying elements utilization. It was made experiments on three silicon steel charges. It was observed that the inhibitor phases ... -
Research Concerning the Influence of Heat Treatment on Physical and Mechanical Properties of Aluminium Based Alloys
(Universitatea "Dunărea de Jos" din Galați, 2006)This work presents the experimental results concerning the behavior on heat treatment of on aluminum based alloy belonging to the class of aluminum alloys deformable and harden by heat treatment. The laboratory level ... -
Thermodynamic Assesment of the Ci-Ti System in Microalloyed Copper Base Alloys
(Universitatea "Dunărea de Jos" din Galați, 2006)The correlations made between thermodynamic and kinetic data of the heterogeneous systems provided insight into the alloys properties. Experimental researches presented in this paper refer to the thermodynamics of Cu-Ti ... -
Hardened Aluminum with Oxide Particles
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper presents the effect of size and dispersion degree of the particles of aluminum oxide, on structure, mechanical characteristics and phenomena that take place when heating at different temperatures for ... -
Research About the Vibration Parameters for a Cold Rolling Mill Machine
(Universitatea "Dunărea de Jos" din Galați, 2006)By using the equipments of vibration measurement we can fight against the damages (strip undulation and thickness variation on the length) who is show in while of mill work. The amplitude of vibration parameters determine ... -
On the Kinetics of Sol Gel Al:ZnO thin Films Crystallization on Silicon Substrate
(Universitatea "Dunărea de Jos" din Galați, 2006)Recently, there is a growing interest in applying ZnO thin films on silicon buffer substrates for p-n junction devices, optical wave guide, etc. A sol gel process is very attractive technique for obtaining oxide thin ... -
Experimental Equation of Deformation Behaviour of a Concrete Steel
(Universitatea "Dunărea de Jos" din Galați, 2006)The plastic deformation behavior is defined by the function of the deformation strength according to the strain, strain rate and temperature as the factor of the deformation process. The behavior law establishes by the ... -
Mathematical Modelling of Steel Continuous Casting Hydrodynamics (1)
(Universitatea "Dunărea de Jos" din Galați, 2006)The quality increase of steel continuous casting and a reliability indices of afferent installations imposes the automation systems adoption of machines of continuous casting of steel. In this paper enters original ... -
Some Aspects Regarding the Elaboration of Multiple precessional Gear Theory and Modern Manufacturing Technology
(Universitatea "Dunărea de Jos" din Galați, 2006)The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of precessional transmissions with multicouple gear. In this paper, the authors present the mathematic model ...