Nizar Ramadan

This paper study the production of small Needles by using Polymer materials. Ferro materials are commonly used, due to good mechanical properties, stainless steel is preferred for medical use, because it has high corrosion resistance and also a commonly used for medical application, but it is expensive and hard to clean for multiple use. The object...

The main objective of this paper is experimental study of pack carburizing of carbon steels (AISI 1020) by using two parameters (holding time and carburizing temperature). This study was conducted by using electrical furnace. This process is carried out at temperatures of 950°C for durations time 90 minutes. From the experiment, the surface hardnes...

During laser beam welding focused high-capacity laser beam moved over the seam of the parts to be welded. The high intensity of the laser beam causes both parts to highly melt. In the melting bath a so-called keyhole formed, which enables the deep penetration of the laser beam. The melting bath solidifies quickly after the laser beam has passed, wh...

Fine pearlitic eutectic steel have a number of desirable mechanical properties and have thus been studied as candidate microstructure for R350HT head hardened rail according to EN-13674 standard. This work examines the role of transformation temperature of R350HT rail grade and their effect on rail hardiness. The fine pearlite structure has been ob...

The main objective of this study is to provide a theoretical framework that defines the various concepts related to the quality of banking services in terms of indicators and models, in addition to addressing the measurement of customer satisfaction to know the extent of customers' awareness of the services provided by Libyan banking institutions i...

In industry develop mechanized and automated welding processes, the welding field taken a high place with raising demand for high production rates, quality, and high precision. Some problem faces resistance spot welding of carbon steel such as selecting suitable and optimum parameters of input process that control conditions, which help to gain req...

Research Paper Open Access w w w. a j e r. o r g w w w. a j e r. o r g ABSTRACT :This study aims to optimizing and investigation in TIG welding parametric influence on tensile strength of dissimilar metals SS-304 and low carbon steel. the literature survey and experimental work has been done. The welding process has been designed using Minitab soft...

This survey presents a literature review on the welding of head hardened rails with a special focus on final structure of rail due to the contact conditions between the cooling process and the pearlitic structure. The experimental studies have been conduct under rails to observed austenitic transformation time and temperature, squeeze and hold time...