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Dissertations / Theses on the topic 'Metallurg'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2025

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1

Maier, Sara. "Slagg från ArcFume-processer : lakbarhet och återvinningsmöjlighete." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-248039.

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Metaller som bryts och utvinns primärt förekommer tillsammans med många andra metaller i malmer och mineral. Avfallsströmmar från metallindustrin har därför ett varierat innehåll av många olika metaller. Metallerna är ofta skadliga för miljön och kan skapa problem för metallproducenterna om halterna är så höga att avfallen inte ens kan deponeras. Det finns skräddarsydda metallurgiska processer för att upparbeta metallhaltigt avfall, i syfte att utvinna de värdefulla metallerna och producera en lakstabil slagg med lågt metallinnehåll. En lakstabil slagg kan ha miljömässiga fördelar som gör att

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2

Hoffman, Kelsey Llyn. "Neutron star metallurgy." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/38311.

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The crust of a neutron star plays an important role in the emission observed from it. The thermal emission generated in the core of the neutron star passes through the crust, thus it is important to know what is in the crust in order to understand how the emission is shaped and altered. The crust itself may be responsible for the observations of glitches from neutron stars and also as a source of gravitational waves. This thesis is two-fold. The first goal is to calculate the composition of the neutron star crust of a non-accreting neutron star. The second is to use the calculated crustal comp

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3

Correa, Zapisotski David, and Martin Wallhed. "Characterizing flowability of metal powders." Thesis, KTH, Materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254754.

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Powder metallurgy is a growing field with much potential. The core purpose and problem in this work is attempting to describe and understand what and how metal powder properties impact powder flowability. Several powder flow experiments have been performed on eight different metal powders with varying size and of material types to examine correlations and seeing what parameters are important for a well flowing metal powder. Experiments performed consists of hall flow, tap density, angle of repose and a more complex Rheometer analysis. The results found display plenty correlations between diffe

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4

Bennett, Anna. "Copper metallurgy in central Thailand." Thesis, University of London, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338123.

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5

Konchenko, Ekaterina. "Resource saving technology in metallurgy." Thesis, Видавництво СумДУ, 2007. http://essuir.sumdu.edu.ua/handle/123456789/12836.

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The consumption of coal and coke in the blast furnace is met on the one hand by the market or on the other hand by the own production. It depends on the conditions of the market and the availability of production facilities. World-wide the production of hot metal and crude steel via the blast furnace/converter route is regarded as the dominant process line also in future. Consequently, after their successes in the past, the ironmaking and steelmaking industry have joined their efforts with the cokemaking industry to exploit still more development potentials for hot metal production. When you a

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6

Смоленніков, Денис Олегович, Денис Олегович Смоленников, Denys Olehovych Smolennikov, et al. "Environmentally friendly metallurgy in Ukraine." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/31624.

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According to the report of international analytical organization World Steel Association (WSA), Ukraine took the 10th place in the world’s steel production in 2012. Traditional steel smelting technology such as usage of Marten’s furnaces with natural gas as fuel causes 3 million tons of waste products a year per one furnace. Pollutants include NOx, CO, SOx and heavy metals dust. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/31624

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7

Morgan, Martha E. "Reconstructing Early Islamic Maghribi Metallurgy." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194119.

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Interactions in culture, science, and technology in early Islamic North Africa are studied through an examination of Maghribi metallurgy. My dissertation, based on the Social/Cultural Construction of Technology (SCOT) model (Bijker 1997), explores the impact of the Islamic religion and culture on scientific and technological change in the spheres of gold and silver minting, copper working, and iron smelting towards reconstructing the role and impact of metals in Islamic society. The purpose of my reconstruction is to define and contextualize early Islamic Maghribi metallurgy for a region and t

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8

Bigdeli, Sedigheh. "Developing the third generation of Calphad databases: what can ab-initio contribute?" Doctoral thesis, KTH, Termodynamisk modellering, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215214.

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Developing the third generation of Calphad databases with more physical basis valid within a wider temperature range is the aim of the present work. Atomistic scale (ab-initio) methods, particularly techniques based on DFT theory, are used for modelling dierent phenomena, so as to gauge the capacity for use in Calphad modelling. Several systems are investigated in this work for studying dierent phenomena, such as magnetism and vibration of atoms. In the case of pure elements (unaries), thermodynamic properties of Mn, Al and C are optimized in the whole temperature range by the help of new mode

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9

Semberg, Pär. "Interactions between iron oxides and the additives olivine, quartzite and calcite in magnetite pellets." Doctoral thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16846.

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In the present study, magnetite pellets with the additives olivine, calcite and quartzite were isothermally reduced in a tubular furnace to study the interaction between iron oxides and the additives. Exaggerated amounts of additives were used in order to enable analyses of phases that do not otherwise occur in sufficient amounts for X-ray diffraction and EDS-analyses. The reduction was set to yield either magnetite or wüstite in the temperature range 500-1300ºC. For olivine, reduction tests were also performed to allow metallization in the range 1000-1300ºC. The mineralogical phases which had

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10

Dwari, Ranjan. "Thermal non-coking coal preparation by triboelectric dry process." Licentiate thesis, Luleå, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16868.

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Coal is the single largest fossil fuel used world-wide and accounts for more than 60% of the total commercial energy consumed. Between 60 to 80% of this coal is used for electric power generation and most of which through a system of pulverised coal combustion. Major portion of the coal used for such power generation is not clean enough to maintain environmental standards. This problem is attributed to high sulphur content in coal used in most of the western countries or ash as is the case in countries like India. In India at present nearly 200 million tonnes per year of coal is used for power

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11

Strandkvist, Ida. "A Dissolution Study of Common Ferrous Slag Minerals." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60227.

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Slag is a vital part of metal production since it removes impurities from the metal. As slag is continuously produced, the options are either to dispose slag in landfill or acknowledge slag as a product. Slag can be used in many different applications, ranging from fertilizer to construction material; in some cases, the properties of slag make it a superior alternative to virgin stone materials. The properties and thereby the field of application is determined by the mineralogical composition of the slag. Slag is considered an environmentally friendly material as long as the leaching of certai

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12

Yanmin, Wang. "Wet magnetic concentration for weakly magnetic mineral fines and ultrafines." Doctoral thesis, Luleå, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26710.

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The first objective of the thesis was to reveal the characteristic magnetic behaviour of natural weakly magnetic minerals (such as hematite and chromite), and the size limits of the particles recoverable by the existing modem high intensity and high gradient magnetic separators. The second objective was to enhance the particle aggregation andlor the magnetic response for wet magnetic concentration of the ultrafines which escaped from the separators. It was observed that weakly magnetic natural minerals (hematite and chromite) exhibited variations in the magnetic behaviour with respect to magne

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13

Ikumapayi, Fatai Kolawole. "Flotation chemistry of complex sulphide ores : recycling of process water and flotation selectivity." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26634.

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Recycling of flotation effluents through the ore processing plant is one of the ways of reducing both plant-operating costs and industrial impact onto the local ecosystem. Such waters named acid mine drainage (AMD), if discharged from sulphide flotation are gypsum (CaSO4.H2O) saturated and have a high salinity (on the order of 1000 ppm). As minor species, they commonly contain reduced sulphur compounds (RSC) (sulfoxyanions with sulphur in the oxidation state below (VI) such as SO32-, S2O32-, S2O52-, and S4O62-), cations of ferrous and non-ferrous metals, frothing molecules, residual chemical r

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14

Engström, Fredrik. "Mineralogical influence of different cooling conditions on leaching behaviour of steelmaking slags." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26246.

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The Swedish steelmaking industry produces large amounts of by-products. In 2006, the total amount of slag produced reached approximately 1 375 000 metric tons, of which 30% was deposited. Due to its strength, durability and chemistry, steel slag is of interest in the field of construction due to it's similarities with ordinary ballast stone. However, some steel slags face an array of quality concerns that might hinder their use. These concerns generally involve the following physical and chemical properties: Volume expansion, Disintegration, Leaching of metals By controlling and modifying proc

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15

Lennartsson, Andreas. "Development of a process model for a Peirce-Smith converter." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25755.

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Copper was one of the first metals ever extracted and used by mankind. It is used for its unique properties, like corrosion resistance, good workability, high thermal conductivity and attractive appearance. New mines are opened to maintain a supply of primary feedstock to copper smelters. These new deposits are in many instances found to have a more complex mineralogy with several minor elements. Besides treating primary material, copper smelters also show an increasing interest in treating secondary material, such as copper containing scrap from waste electric and electronic equipment, which

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16

Hu, Xianfeng. "Fundamental Studies on Direct Chromium Alloying by Chromite Ore with Designed Alloying Precursor." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18117.

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Chromium is an important alloying element for stainless steels and other Cr-bearing steels. During the steelmaking process chromium is added to the steels mainly in the form of ferrochrome, which is largely produced by the energy-intensive smelting reduction process of chromite ore in the submerged arc furnace. To reduce the overall energy consumption during the ferrochrome production process and the chromium alloying process, direct chromiumalloying by chromite ore has been proposed. The application of this process will integrate the processes for ferrochrome production and chromium alloying,

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17

Mwanga, Abdul. "Test Methods for Characterising Ore Comminution Behavior in Geometallurgy." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18689.

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Comminution test methods used within mineral processing have mainly been developed for selecting the most appropriate comminution technology for a given ore, designing a grinding circuit as well as sizing the equipment needed. Existing test methods usually require comparatively large sample amounts and are time-consuming to conduct. This makes comprehensive testing of ore comminution behavior – as required in the geometallurgical context – quite expensive. Currently the main interest in the conduct of comminution test lies in the determination of particle size reduction and related energy cons

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18

Karlkvist, Tommy. "Design and Development of Mineral Structure Specific Collectors in Flotation." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18421.

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The success of mineral flotation processes depends on the hydrophobization of the surface for the desired mineral particles whilst keeping, or making, all other minerals hydrophilic. This is achieved by adding several reagents to the flotation pulp to adsorb selectively at the mineral/water interface. The reagents (surface active agents) which selectively adsorbs on minerals to be floated are called collectors. It is realized that many of these commonly used reagents are highly toxic and often potential threats to the environment. Use of many of theseconventional chemicals will therefore be re

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19

Myrsell, Karl. "Djupkylningens inverkan på struktur och egenskaper för stålsorterna SS716 och Flap-X." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68691.

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Konkurrensen inom stålbranschen blir allt hårdare och för att stanna i toppsegmentet krävs innovation och ständiga förbättringar. Då höglegerade stål såsom rostfria stål kyls till rumstemperatur passeras inte temperaturen för fullständig martensitbildning. Genom att använda flytande kväve kan temperaturen sänkas så lågt som till -196°C. Således kan andelen martensit i provet ökas samtidigt som andelen austenit minskar. I detta examensarbete undersöks hur djupkylning med flytande kväve påverkar stålsorterna Flap-X och SS716 gentemot kylning till rumstemperatur. Målet med arbetet är att genom et

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20

Westerholm, Mikael. "Rheology of the mortar phase of concrete with crushed aggregate." Licentiate thesis, Luleå : Luleå University of Technology, 2006. http://epubl.ltu.se/1402-1757/2006/06/LTU-LIC-0606-SE.pdf.

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21

Sandberg, Erik. "Energy and scrap optimisation of electric arc furnaces by statistical analysis of process data." Licentiate thesis, Luleå, 2005. http://epubl.luth.se/1402-1757/2005/21.

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22

Hilding, Tobias. "Evolution of coke properties while descending through a blast furnace." Licentiate thesis, Luleå, 2005. http://epubl.luth.se/1402-1757/2005/19.

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23

Gahan, Chandra Sekhar. "Comparative study on different industrial oxidic by-products as neutralising agent in bioleaching." Licentiate thesis, Luleå : Luleå University of Technology, 2008. http://epubl.ltu.se/1402-1757/2008/19/.

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24

Spector, Robert. "Puckelglödning : En alternativ mjukglödgningsprocess." Thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71952.

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Mjukglödgning av kullagerstål är en förutsättning för att kunna vidareförädla stålet. Processen är idag väldigt tidskrävande vilket gjort den till en flaskhals i produktionen. Detta examensarbete har gått ut på att titta närmare på en snabbare mjukglödgningscykel, kallad puckelglödgning, som idag används i Hofors och ställa det i förhållande till nuvarande cykel som används i Rullhärdugn 1. Genom labbugnstest, dilatometertester samt en skarp körning har data tagits fram för hårdhet och struktur vilket sedan analyserats och jämförts med motsvarande data från dagens process. Målet har varit at

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25

Karmakar, Mattias. "Additive Manufacturing Stainless Steel for Space Application." Thesis, Luleå tekniska universitet, Materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72901.

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26

Lishchuk, Viktor. "Geometallurgical programs – critical evaluation of applied methods and techniques." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26607.

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Geometallurgy is a team-based multidisciplinary approach aimed at integrating geological, mineralogical and metallurgical information and yielding a spatial quantitative predictive model for production management. Production management includes forecast, control and optimization of the product quality (concentrates and tailings) and metallurgical performance (e.g. recoveries and throughput); and minimization of the environmental impact. Favourable characteristics of an ore body calling for geometallurgical model are high variability, low mineral grades, complex mineralogy and several alternati

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27

Rosala, Fabrice. "Improvement and Development of Powder Spreadability Testing." Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301259.

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With rising interest in metal additive manufacturing and, specifically, in powder bed fusion processes, it is essential to understand relevant process parameters and the behavior of powders used in such processes. At the time of writing, the flow behavior of powders is in the spotlight whereas little research into the spreadability of a powder is being conducted. While the two characteristics are related, powders that are being spread are subject to different force loads which are not present during the simple flow of a powder. This work develops a testing system capable of qualitatively and q

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28

Dalai, Biswajit. "Material characterization of AA7075-T651 deformed at different temperatures and strain rates." Licentiate thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-84325.

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In this licentiate thesis, the mechanical response and the microstructure evolution in aluminum alloy (AA) 7075 in its T651 heat treated state have been studied through mechanical tests at varied conditions of strain rate and temperature. First, compression tests were performed on AA7075-T651 samples at room temperature (RT), 100, 200, 300, 400 and 500 °C (melting temperature of AA7075 is ~635 °C) with two comparatively low strain rates of 0.01 and 1 s-1 using a Gleeble thermo-mechanical simulator. The effects of softening mechanisms, such as adiabatic heating, dynamic recovery (DRV) and dynam

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29

Saeed, Mohazzam. "Exploring effects of hydrodynamic flotation variables on their respective metallurgical responses through laboratory scaling up." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-87078.

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To meet the increasing demand for raw materials, higher throughput of mineral separation through froth flotation is becoming important. This higher throughput can be achieved by increasing the size of flotation equipment termed scaling up. Flotation performance is greatly affected by the size of flotation machines and remains an important research area to correlate flotation behavior between small and larger flotation machines. The Outotec GTK LabCell®, a mechanical flotation machine, has been used as a benchmark for many industrial pre-feasibility studies around the world for the past decade.

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30

Awe, Samuel Ayowole. "Hydrometallurgical upgrading of a tetrahedrite-rich copper concentrate." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25657.

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Removal of impurity elements in copper metallurgy is one of the major problems encountered today since pure copper ore reserves are becoming exhausted and the resources of unexploited ores often contain relatively high amounts of antimony, arsenic, mercury and bismuth, which need to be eliminated. The present work aims at pre-treating a tetrahedrite rich complex copper sulphide concentrate by selective dissolution of the impurities, therefore, upgrading it for pyrometallurgical processing. Characterisation of the complex concentrate was performed and the result shows that antimony and part of

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31

Larby, Line, and Annie Lundberg. "Primary Study of the Phase Relationship in the MgO-"V2O3" System at 1873 K and pO2=10-11 atm." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231901.

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Vanadium can be found in some iron ores as an impurity. Since vanadium is a valuable alloy element there lies an interest in development of a stable and economic way for extraction of it. For this, knowledge about the thermodynamics behind the V-O system combined with other elements, like Mg, is indispensable. A transitional metal like vanadium exists in multiple valences which makes it difficult to study. When vanadium oxide is mixed with other metal oxides the vanadium tends to concentrate in spinels. To investigate the types of phases formed in the Mg-O-V system at 1873 K and an oxygen part

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Kilpinen, Markus. "Tillsats av bränd dolomit som slaggbildare för ett minskat infodringsslitage." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70539.

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Svensson, Josefin. "The effect of carbonaceous iron on slag foaming." Thesis, KTH, Materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233008.

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The practise of slag foaming has become increasingly important within the scrap-based steelmaking, conducted in the electric arc furnace, due to its many advantages. In addition to increasing the efficiency in the furnace, the foaming protects the furnace equipment from wear and reduces noise pollution. The purpose of this project was to investigate the slag foaming generated through chemical reactions that occur at the addition of carbonaceous iron to the slag, as well as to evaluate the experimental method used. A slag composition of 25 wt% FeO, 40 wt% CaO and 35 wt% SiO2 was chosen. The exp

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Lotfian, Samira. "Alternative reducing agents in metallurgical processes : Experimental study of thermal characterization of shredder residue material." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26641.

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Coal used in metallurgical processes can participate in reduction reactions to produce metals and alloys from oxides. Base metals production leads to generation of slag, which contains valuable metals that can be recovered and recycled. There are several options to treat the slag, depending on the metal content in the slag. One is slag fuming, which is a well-established process that is traditionally used to vaporize zinc from zinc containing slags, mainly lead blast furnace slag, but is applied in a few plants for copper smelting slags. In this process reduction is achieved using pulverized c

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Ma, Ping. "Experimental studies on treatment and recycling of pickling sludge generated in stainless steel production." Licentiate thesis, Luleå tekniska universitet, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18242.

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Pickling sludge generated in the stainless steel industries contains large amounts of calcium fluoride and water and relatively small amounts of metals. Therefore, such sludge is difficult to be directly recycled back to the EAF process and would be harmful to the environment if deposited as landfill for a long term. The main objective of the present thesis work is to find out proper ways to treat the pickling sludge and to recover useful metals from it. For this, characterisations, solid-state reduction and smelting reduction tests on the pickling sludge were carried out in the laboratory. Li

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Ökvist, Lena Sundqvist. "Optimisation of the slag formation in a blast furnace charged with 100% pellets." Licentiate thesis, Luleå tekniska universitet, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18685.

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This work is based on experiences from industrial blast furnaces. Process irregularities when testing self-fluxed pellets Process disturbances when charging increased proportions of coarse pellets Laboratory tests to evaluate the effect of basic fluxes on the slag formation in the bosh and in the raceway have been carried out. Pilot scale tests have been performed to verify the effect of coarse pellets. The effect of reduction degree and the reduction behaviour on the slag formation and blast furnace performance have been evaluated It was found that decreased degree of reduction of pellets or

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Ryk, Lennart. "Kolvariationer och leveransuppföljning." Licentiate thesis, Luleå tekniska universitet, 1985. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16823.

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Nedar, Lotta. "Experimental and thermodynamic study of dust formation in BOF steel making." Licentiate thesis, Luleå tekniska universitet, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26469.

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Carsbring, Amanda. "Heat Treatment and Secondary Phase Formation in FeCrNi Medium Entropy Alloys." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291251.

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The topics of high entropy alloys (HEA) and medium entropy alloys (MEA) have been heavily researched in recent years. A HEA usually consists of five or more base elements, and a MEA would have three or four base elements. These types of alloys are multi-principal element alloys (MPEA) that have been thought to have interesting properties due to their high configurational entropy, which was thought to be the reason for stabilized simple solid solution phase in the HEA. The high entropy effect contributing to stable single phase in these alloys has been discussed and has not been found to be a p

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Welander, Henrik. "Preliminary experimental study on the affect of water of the hydrogen reduced hematite pellet." Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-293914.

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Global warming is one of the most important challenges that we are facing today. Since carbon dioxide (CO2) is by far our most common green house gas pollutant, most large corporations need to reconsider how their production is performed to keep the global warming below 2 ◦C. Today the steel production in Sweden accounts for 10% of its total annual emission of CO2. HYBRIT (Hydrogen Breakthrough Ironmaking Technology) is a joint venture between LKAB, SSAB and Vattenfall which aims to develop a new iron making route by reducing iron ore pellets with hydrogen gas, producing water as off

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Jonzon, Andreas. "Characterization of High-silicon alloy ductile iron in very thick sections." Thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79194.

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Valmet AB has ha foundry located I Karlstad, Sweden. The foundry has specialized in large components in ductile and gray iron. This report is a part of an evaluation of a new alloy that Valmet has produced. The alloy is called S550 where 550 is the expected tensile strength in a cast on sample. S550 is a ferritic ductile alloy with 4,15-4,25% silicone. In this experiment the alloy is casted in very large sections to better match the intended final product. The purpose of the report is to promote a better understanding of how silicon works in large castings. Ultimate tensile strength, yield str

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Nordenskiöld, Simon, and Reiland Elias Nybacka. "The disclosure of Otto Meyer's secret : An evaluation of composition and casting properties of the Fritzi alloy." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277876.

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The increased copper price during the first world war forced the Swedish master founder OttoMeyer to invent a new alloy in order to continue casting artworks at a reasonable cost. The recipe of the alloy was a secret that Meyer kept to himself even unto death. The name of the alloy became Fritzi, but the number of objects cast in this alloy was never published.However, among the art pieces is G. Lindberg’s statuette “Vågen”. In this project, the composition of Fritzi was determined using SEM and EDS analysis on a sample from “Vågen”, and some thermodynamic, physical, and casting properties wer

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Augustson, Julia, and Madeleine Bogg. "Impact Damage Assessment : In collaboration with Saab aerostructures." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277881.

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This project that has been executed in collaboration with Saab aerostructures deals with how three materials, aluminum, titanium and corrosion resistant steel react when they are affected by different energy levels. These energy levels serve the purpose of representing damages that can happen in storage and handling to components used in production. A literature study was made to gather information regarding the treated materials as well as some methods that can be used to test a materials property. The goal of the project is to create a tool for Saab to use in their production in order to fir

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Rosén, Rebecca. "A literature study on measurement methods for calculating the FeO activity in slag." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277890.

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During the time we live in, climate change is more important than ever. HYBRIT, formed bySSAB, LKAB, and Vattenfall, is an initiative set out to make the steel production fossil free, by developing a novel process that produce direct reduced iron (DRI) using hydrogen as reagent. Electric arc furnaces (EAF) will then be employed to melt the DRI. For SSAB, it is important to obtain a satisfied dephosphorisation in the EAFs for the production of high strength steel. The composition of the DRI, has a big impact on the dephosphorisation and it is important that the slag has an optimal basicity and

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Brisenmark, Emil, and Valencik Jane Jönsson. "Evaluation of the Effect of Non-Metallic Inclusions on the Corrosion Resistance of Stainless Steels and Nickel-based Alloys." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277900.

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Non-metallic inclusions (NMI) are small impurities that can always be found in steel and other materials. NMIs are of great importance because they may negatively impact various properties of the steel, depending on their composition, morphology and numbers. In the oil and gas industry, one of the most concerning property that can be affected by the NMIs is corrosion resistance. In this report, certain aspects of NMIs were investigated, such as size or composition and effect which they have on the corrosion resistance. To accomplish this, two different steel alloy samples from pipelines were a

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Morata, Royes Joan. "Wear resistance of heat-treated Advanced High Strength Steels and casting." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80526.

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The necessity to improve the durability of the machinery used in the milling industry has lead to several types of research. One study is focused on the plates that are located in the stationary and moving jaws of crushers to diminish particles sizes of Gneiss and Diabase rocks. Thus, one type of approach to increase its durability is by reducing the material loss of the plates. Amongst all the parameters to reduce the wear ratio that includes inputs from geometry to load, just the hardness input of the material can be in constant development. Consequently, there are two well-known types of he

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Philipson, Harald. "The effect of thickness and compaction on the recovery of aluminium in recycling of foils in salt flux." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280048.

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In Norway, more than 40.000 tonnes of aluminum (Al) in food packaging goes to incineration annually. Recycling this waste would save more than 1.5 TWh of energy and several hundred thousand tonnes of CO2 emissions. However, recycling thin aluminum foil in small packaging is more difficult than recycling of larger and cleaner scrap. In this thesis, properties of compacted coating-free Al foil with five different thicknesses (15, 30, 100, 200, 300 𝜇𝜇m) were investigated and related to percentage Al recovery during remelting in salt flux. This thesis consists of five main parts. Two initial studi

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Kamalasekaran, Arun. "Numerical and experimental investigations of gas jet used in atomisation of metal powders." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281858.

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The environmental impact caused by the traditional production techniques has led to increased research in the field of alternative production techniques such as additive manufacturing. However, the environmental sustainability of the manufacturing techniques that produce and supply powders to the additive manufacturing process can be improved significantly. This project deals with improving the fraction of powder produced by gas atomisation that is suitable for any specific manufacturing process, by optimising the convergent-divergent nozzle used in the process. In order to identify the influe

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Selldén, Adam. "Evaluation of Heat Treatments for the Nickel-Based Superalloy Haynes® 282® Manufactured by Selective Laser Melting : A Study Based on Microstructural Examinations and Mechanical Testing." Thesis, Linköpings universitet, Konstruktionsmaterial, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170844.

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Nickel-based superalloys have a wide range of applications, mainly in gas turbines for power generation and aircraft propulsion. They are superior to competing alloys in maintaining excellent mechanical properties for extended durations at extreme temperatures and loads, all while resisting corrosion and oxidation. Haynes 282 is a new age-hardenable nickel-based superalloy that is reported to have a remarkable combination of creep strength, thermal stability, weldability and formability that gives it potential for new applications. Additive manufacturing (AM) is often referred to as 3D printin

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Johansson, Carl, Amanda Engström, Emil Lundgren, et al. "Heat transfer in pressed steel powder - Part 1: Temperaturemeasurements in capsules." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388887.

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