http://arthra.ugal.ro/handle/20.500.14043/25819 Thu, 16 Apr 2026 12:41:37 GMT 2026-04-16T12:41:37Z http://arthra.ugal.ro/handle/20.500.14043/25829 Analysis of Factors with Considerable Action on Recycling Weee Focused on Metals Recovery Ciocan, Anișoara From an economic point of view, the driving force of rapid technological development of WEEE recycling solutions is the recovery of valuable metals, until not long ago just on copper and gold. Nowadays many other metals have become the target of WEEE recycling. From this point of view, the importance of WEEE recycling results from the analysis of factors with considerable action on this process. This paper highlights the necessity of WEEE recycling by analyzing the following key issues regarding the recovery of valuable metals. The study was mainly focused on the following aspects: electronic waste is a significant source of base and precious metals, and also of scarce metals; many of the metals which are essential in the manufacture of EEE; the availability of metals necessary in the production of EEE constantly decreases; supply shortages for many elements obtained from natural resources; worldwide ore reserves are limited and unequally distributed; in the world, the production of essential metals in the construction of a mobile phone is dominated by a few companies; the extraction of many metals in a ore deposit is co-dependent on other factors. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 1 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25829 2017-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25828 The Quality of Metal Products Made on CNC Machines Pușcaș (Popescu), Nela Contemporary market must provide products that adapt to customer needs, which requires large investments and long-term employment. Producers have to take care of the buyers’ different way of thinking. The quality of products and services is an important economic indicator. The paper presents studies and research in the field of bending of metal parts (thickness between 1 and 3 mm) on CNC machines. This paper tries to provide answers to the many problems arising in the companies due to the quality of the economic goods. In the technological flow of the achievement of a metal product, bending is very important, the quality and conformity of the product depending on this operation. The paper proposes laborious research and studies on determining the drawings of metal parts with the thickness between 1 and 3 mm, considering that other variables such: the temperature variation during the processes of punching and bending, tool usage, the tolerance between the surfaces of the bending tools, the vibrations of the machines, their usage and the roughness of the sheet metals may influence the quality and precision of the products. The calculation of the drawing (the geometry in plane of the piece) becomes important because it must include the deformation caused by the bending operation. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 1 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25828 2017-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25827 Investigation of Mechanical Properties and Corrosion Behaviour for 1010 Carbon Steel Pipes Used for Steam Boilers Harb Abou, Alaa; Ciuca, Ion; Rahali, Bilel; Gheța, Roxana-Alexandra Depending on the conditions of their use, most equipment gets deteriorated in time. In this paper the corrosion rate (CR) was verified by using the experiment of weight loss (WL) of specimens from steam boiler pipes (SBP) made of 1010 carbon steel with a thickness of 4 mm. CR was calculated by specimens’ weight loss in the corrosive environment at 25 °C in 5% NaCl - 10% H2O2 solution which reproduces the environment in the plant during specific times. The mechanical properties which were verified include hardness test and tensile test. The results that have been obtained through tensile curves and hardness properties on specimens 1 and 2 were compared to a non-service specimen (3) made of 1010 carbon steel. It is concluded that there was an increase in the properties of tensile and a decrease of hardness for both specimens by comparing them with a non-service specimen. Due to overheating, a deposition of layers of lime (CaO) on the pipes was caused. It is noticed that the decrease of the mechanical properties leads to increased corrosion. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 1 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25827 2017-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25826 Object Oriented Architecture for Product Information System Engineering Rahali, Bilel; Abou Harb, Alaa The product information system is an organizational device for regulating the creation, circulation, use and evolution of the information assets of the product definitions. It refers to all the information that defines how the product is designed, manufactured and used. Product information systems have become a critical element for the enterprises to support their process of product offer definition. The company SOTACIB itself assembles these production elements (from the basic composition phase to the final phase). Our application provides a computerized management system for the technical data of the product manufacturing. Its objective is to support the development activities of the cement product by preparing atomized powders such as grinding, controlling the parameters of the slip, by sieving and final atomization. An UML modeling of the system is developed in the context of a driven approach centered on a proposed architecture. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 1 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25826 2017-01-01T00:00:00Z