Căutare 1993 -2018 după Data publicării
Afișează articolele 141-160 of 552
-
Some Aspects About the Refractory Lining Wear in Furnaces
(Universitatea "Dunărea de Jos' din Galați, 2007)For melting cast iron, carbon steel, copper and copper alloys the quartzite is still one of the most used lining material and the most cost effective as well. The silica lining has to be replaced frequently due to the ... -
Influence of the Furnace Temperature in Continuous Flux quenching on the Characteristics of Low Carbin Steel Straps
(Universitatea "Dunărea de Jos" din Galați, 2007)In this paper there are presented mechanical characteristics (resiliency, elongation) and structural characteristics resulted from quenching thermal treatment made on an experimental installation, in continuous flux, on ... -
XRD Analysis in Front of a Corrosion Crack Tip
(Universitatea "Dunărea de Jos" din Galați, 2008)During exploitation of the heat exchangers some damages can appear in the contact region between the gaskets and the stainless steel walls. The studies upon the material were performed using SEM microscopy, X-ray ... -
Fatigue Degradation of Materials as a Tool for Damage Assessment
(Universitatea "Dunărea de Jos" din Galați, 2008)Damage assessment of components or systems is strongly related to the way components fail. Thus, an appropriate understanding of failure degradation of components is necessary. Furthermore, most of the failures are related ... -
The Conservability of Old Wood at the Contact with Metallic Structural Components from Artifacts
(Universitatea "Dunărea de Jos" din Galați, 2008)The paper presents the impact of metallic pieces being in contact with wood, as structural elements, used in obtaining artifacts. The paper studies, based on old samples, the reciprocal effect obtained at the wood-metal ... -
Decorative composite Layers
(Universitatea "Dunărea de Jos" din Galați, 2008)Part of the materials used in the chemical industry, metallurgical, machine construction, can be coated, as with time it occurs either a decrease of its properties, or even a process of advanced faulting, because of the ... -
On the Corrosion Resistance of Cu-Mo Composite Materials Obtained by PVD Method
(Universitatea "Dunărea de Jos" din Galați, 2008)The Cu – Mo composite materials have been obtained by electron flow vaporizing followed by vapor –phase condensing. Researches have shown that corrosion resistance in wet environment varies with the content of ... -
Mass Erosion and Material Transfer at the Deposition of Layers by Inverse Electroerosion
(Universitatea "Dunărea de Jos" din Galaţi, 2008)The deposition and alloying of the superficial layers by inverse electroerosion or by electric spark given by a vibrating electrode permits to obtain a large scale of properties at the surface of metallic materials from ... -
Hardening of the Grey Cast Iron Through the Vibrating Electrode Method Using a WC Electrode and in Combination with Ti Electrode
(Universitatea "Dunărea de Jos" din Galaţi, 2008)There have been tested samples of grey cast iron, the hardening being made through WC coating through the vibrating electrode method with a layer, two layers and through double layers combined with Ti and TiC. Besides ... -
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 ... -
Researches Concerning the Deformation Behaviour of a Low Carbon Steel
(Universitatea "Dunărea de Jos" din Galaţi, 2008)The paper shows the results of the researches meant to establish the equation of deformation behavior of low carbon steel. The behavior law is established by the experimental way, using the torsion test method. The ... -
An Analytical Procedure for the Prediction of the Stress-Strain State in Notches Under Multiaxial Fatigue
(Universitatea "Dunărea de Jos" din Galaţi, 2008)This work presents an analytical procedure for estimating elastic-plastic stresses and strains in notched shafts subjected to synchronous non-proportional torsional and tensile cyclic loading. The specification of the ... -
Thermal Analysis of Inoculated Grey Cast Irons
(Universitatea "Dunărea de Jos" din Galaţi, 2008)A research was done to investigate the effect of 0.05…0.25wt.% addition rate of Ca, Zr ,Al – FeSi alloy, in ladle and in-mould inoculation of grey cast irons. In the present paper, the conclusions drawn are based on ... -
Influence Pressure and Size Particle to Extraction by CO2
(Universitatea "Dunărea de Jos" din Galaţi, 2008)Supercritical fluid extraction (SFE) is an efficient extraction technique for the separation of various organic compounds from herbs, or more generally, from plant materials. These proporties of SFE make the products ... -
Structural Characteristics in Cobalt Based Alloys
(Universitatea "Dunărea de Jos" din Galaţi, 2008)In the present paper there are presented results of investigations on samples of partially removable denture made of cobalt base alloys (Co-Cr-Mo) regarding specific structural analysis: determination of structural phases ... -
Hydrodynamic Aspects on EAF's Smelt Metallic Mirror
(Universitatea "Dunărea de Jos" din Galaţi, 2008)Using the Physical and Mathematical knowledge, a new approach to EAF bath’s hydrodynamic aspects is proposed to be developed in this paper. Experimental results and a mathematical equation package have been concluded ... -
The Influence of Cold Rolling on the Mechanical Characteristics for Drawing Steels
(Universitatea "Dunărea de Jos" din Galaţi, 2008)The paper presents the changes of the mechanical and technological characteristics of steel for deep drawing, cold rolled and recrystallization heat treated. The research was conducted on samples taken from cold rolled ... -
Contribution in the Domain of the Contact Stresses Between Cylinders of Cold Rolling
(Universitatea "Dunărea de Jos" din Galaţi, 2008)Elasto-plastic contact stresses between working cylinder and support cylinder of cold rolling using FEM are presented in this paper. Pressure and tractions resulted from the rolling process were obtained by using a ... -
On the Constitutive Equation of a Low Carbon Steel
(Universitatea "Dunărea de Jos" din Galaţi, 2008)The paper shows the results of the researches concerning the equation of deformation behavior of low carbon steel. The behavior law is established starting from the experimental torsion moment. The composed constitutive ... -
Tribological Behaviour of Nitrocarburized Steels After Thermo-Magnetic Treatments
(Universitatea "Dunărea de Jos" din Galaţi, 2008)Two types of steels were subjected to a nitro-carburized thermo-chemical treatment after thermo-magnetic treatments. The structural aspects into the superficial layer of these steels are studied during the friction process ...
