Căutare Fascicula IX după Subiect "steel"
Afișează articolele 1-20 of 23
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Behavior of 1% Cr Steels at Fluidized Bed Nitrocarburizing
(Universitatea "Dunărea de Jos" din Galați, 2005)Paper is based by nitrocarburizing experiments made on pilot installation. For experiments were used different samples of steel at different nitrocarburizing regimes. Influence factors were: temperature and ammonia ... -
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 ... -
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 ... -
Choosing and Using Rationally the Thermic Processed Steels
(Universitatea "Dunărea de Jos" din Galați, 2012)On a global scale one can notice a constant preoccupation for a rational choosing and using of the materials on the whole and, especially of the steels with the main objective the increase of the machines’, equipment’ ... -
Effects Exerted by Slag Carried over from Converter in the Ladle on the Aluminum Assimilation
(Universitatea "Dunărea de Jos" din Galați, 2014)In the present paper are shown aspects of the influence exerted by the some less controlled parameters of BOF steelmaking, mainly of slag characteristics at tapping. Following the necessities to control the steel ... -
Establishing the Rolling-Friction Coefficient for Different Contacts Between Balls and Termochemicallly Treated Steel Rolling Paths
(Universitatea "Dunărea de Jos" din Galați, 2014)Within the frame of this work, the influence of four very well-known and often used thermochemical treatments (carburizing, carbonitriding, nitriding and nitrocarburizing) of steel rolling paths applied on rolling-friction ... -
Evolution of some Structural Fine Parameter in the Superficial Layer During Low Cycle Fatigue Process
(Universitatea "Dunărea de Jos" din Galaţi, 2008)Using laminate samples, investigations have been realized at variable solicitation of pure bending on a patented machine. The machine has two working places and it can be adjusted for different deformations, frequencies ... -
Influence of Secondary Refining Treatments on the Quality of High-Grade Steel Used in Oil and Gas Industry
(Universitatea "Dunărea de Jos" din Galați, 2015)Steel is the most important alloy used in oil and gas industry from production and processing to the distribution of refined products. In this research is analyzed the production technology of steel intended for long ... -
Influence of the Unconventional Treatment Applied to a Steel on the Corrosion Evolution
(Universitatea "Dunărea de Jos" din Galați, 2016)The study of an alloyed steel with Cr Mo with an important content of aluminum (0.9…1.2%), unconventionally treated in magnetic field, is attractive because of the durability which increases along with the improvement ... -
Introduction to Metallic Biomaterials
(Universitatea "Dunărea de Jos" din Galați, 2017)The paper presents a bibliographic study about the metallic biomaterials, synthesizing the aspects related to properties, applicability, obtaining methods. Biomaterials can be used as medical devices, implants and ... -
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 ... -
Modelling by Finite Element Analysis Method of Stress State Establishing for an Alloy Steel
(Universitatea "Dunărea de Jos" din Galați, 2008)The paper presents some results about the tension state in samples subject to pure bending fatigue process. Numerical simulation based on finite element method was used. The tension field induced by a vertical deformation ... -
Modern approaches in Design Optimization of Parts and the Development Trend of Surface Treatments
(Universitatea 'Dunărea de Jos"din Galați, 2012)This paper summarizes the surface engineering technologies having a substantial contribution to increasing operational performance of the parts as well as current trends in the implementation of surface processing ... -
Nanostructured Surface for 38MoCrA109 Steel by Nitriding in Nitrogen Atmosphere and Yag;Nd Pulse Laser Activation
(Universitatea "Dunărea de Jos" din Galați, 2008)YAG:Nd pulse laser is usually used for cutting and welding. The paper is based by experiments using YAG:Nd pulse laser (KVANT 17-CIS made). Technological modules were assembled for laser beam deviation and for relative ... -
On the Corrosion Behavior of Organic Nanocomposite Coatings
(Universitatea "Dunarea de Jos" din Galați, 2009)Recently, researches on composite coatings of organic nature with the addition of metallic oxide nanopowders have shown an increasing corrosion resistance of metallic materials. Carbon steel shows an improved behavior ... -
Particular Aspects Concerning Instability at Interface LCAK Steel SLAG (CaO-Al2O3) Due to Transfer of Sulphur, Evaluated Using the Model Reichenbach-Linde Adapteda
(Universitatea "Dunărea de Jos" din Galați, 2013)Based on the model of Reichembach and Linde, adapted to the interface in the system LCAK steel-(CaO-Al2O3) slag at temperature 1873.15K, it is shown that transfer of sulphur from steel to slag could promote interfacial ... -
Statistical Correlations Between Chemical Composition and Mechanical Properties of A516 Grade 65 Steel
(Universitatea "Dunărea de Jos" din Galați, 2016)In order to respond to required demands associated to certain operation conditions, the steels used in petroleum, petrochemical and chemical processing industries must have significant improved mechanical properties. ... -
Steel Flow Control of Continuous Casted Slabs Using Submerged Entry Nozzle Exchange System for Tundish
(Universitatea "Dunărea de Jos" din Galați, 2007)In the steel making process, the continuous casting of molten steel is a very important step which involves hi-tech facilities. The flow control is a very important issue that influences the quality of the final products. ... -
Studies Regarding the properties Modification of AISI 310S Steel
(Universitatea "Dunărea de Jos" din Galați, 2017)The paper presents an analysis of classical heat treatments, which can be applied to AISI310S steel samples. The influence of these heat treatments was highlighted by micro-hardness measurements – Vickers method, and ... -
Surface hardening for Low Carbon Steel (A3k) by Yag: Nd Pulse Laser Thermal Activation
(Universitatea "Dunărea de Jos" din Galați, 2008)The paper is based on experiments for surface hardening on A3k (low carbon steel) samples using YAG:Nd pulse laser. A small x-y moving system conducted by PC was made for sample scanning, relative to fixed focused laser ...