International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 05 | May 2022
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
Analyzing the Effect of Alloying Addition in Steel samples Qazi Mohammad Khalid Mehraj1, Abhishek Thakur2 1M.Tech
Scholar, Universal Institute of Engineering & Technology, Lalru Professor, Universal Institute of Engineering & Technology, Lalru ---------------------------------------------------------------------***------------------------------------------------------------------------Abstract: The alloying addition to steel is important to improve its properties according to the applications. There are 2Assistant
number of applications for which the superior surface properties are required. The surface properties may include the hardness, wear resistance, friction, corrosion resistance etc. In the present study, the work focuses on the hardness and corrosion resistance. Hardness is considered as resistance to indentation which can be increased by number of methods, out of which one is to refine the grain boundaries that restrict the dislocation movement and increase the hardness. The corrosion resistance is considered as the resistance to chemical action taking place at the surface of any sample. The corrosion resistance can be increased by passivating the samples easily and effectively by stable passive film. The Ti addition was considered beneficial in the present study to enhance the hardness, corrosion resistance and reducing the chances of crack formation in steel by avoiding the formation of harmful intermetallics of other alloying elements. The hardness value was determined for all the samples. The corrosion resistance was analyzed in H2SO4 solution for observing the suitability of material in harsh environments. The hardness and corrosion resistance increased with the addition and increase of the Ti content.
Keyword: Hardness, Corrosion, Passivation, Tafel 1. Introduction Steel is an alloy that consists of iron and carbon and may have up to 2.1 percent carbon by weight. Steel may also include a few additional alloying elements, such as manganese, chromium, nickel, and so on. These elements are added to enhance the qualities of steel so that it may be used for the ultimate use that was envisioned. Steel has several qualities in addition to its tensile strength, including ductility, resistance to corrosion and wear, red hardness, hardness, weldability, fatigue resistance, and red hardness. Steel is one of the most extensively used alloys in the world due to its inexpensive cost and several desirable qualities, such as those described above. Steel is the most widely used industrial material due to the combination of its qualities and the fact that it is relatively inexpensive. Steel's uses are diverse. Its dependability is enhanced by the fact that, in comparison to other metals, it is found in relatively large quantities. Steel is used in the building industry, vehicle manufacturing, shipbuilding, infrastructure development, the military, as well as the production of tools, household appliances, machinery, and machine tools. Steel may have its characteristics improved via the application of methods called heat treatments. Since the 1870s, the production of steel ingots has been ongoing. Pouring-sectioning experiments were carried out at astronomically inflated costs in order to explore the solidification sequences, which were necessary in order to comprehend the solidification behavior of such ingots at the time [1–4]. For the purpose of evaluating the ingots' structural integrity, composition, and soundness, several dozen ingots ranging in weight from a few hundred kilos to several hundred tons were carefully poured and sectioned. There are still a few solidification related phenomena that are not completely known, despite the fact that the majority of the essential information about the manufacturing of steel ingots has been thoroughly established. As a result, it should not come as a surprise that expensive pouring-sectioning experiments are periodically carried out even in the modern day. [5–9] The experiments carried out now are different from those carried out in the past because contemporary techniques of analysis are used in order to get additional information about the tests' structural and compositional components. The development of new alloying ingots for specific applications is one of the reasons why those experiments need to be repeated; however, an even more important reason is to evaluate the efficacy of numerical models, which are thought to one day be able to take the place of those taxing experiments. In this respect, modeling studies and numerical simulations of ingot castings have emerged as the most cost-effective way; yet, there is still a lack of trust in the findings produced by these methods. In the 1960s, numerical simulation was initially put to use for the purpose of modeling the behavior of hot metals for the very first time. [10]
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