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Dissertations / Theses on the topic 'Turning with sintered carbide'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Ugwoha, Ezedimbu. "Performance of uncoated carbide tools in face turning of titanium base, Ti-6246 alloy and when drilling sintered nickel-base, RR1000 alloy." Thesis, London South Bank University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618691.

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2

Prno, Peter. "Obrábění kobaltové slitiny UmCo50." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444280.

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The diploma thesis deals with the topic of machinability of materials. The theoretical part describes the aspects according to which machinability can be evaluated. The material side of the thesis is focused on various types of difficult-to-machine materials. The cobalt alloy UmCo50 belongs to the group of difficult-to-machine materials and it is the subject of the experimental part. UmCo50 is an alloy for high temperature use. The primary aim of the thesis was to monitor the wear of the selected cutting tool when turning this alloy. Other aspects of the selected machining process were also mo

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3

Jiang, H. "Tensile creep of sintered silicon carbide." Thesis, Swansea University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637429.

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Pressureless sintered silicon carbide is currently being evaluated for advanced aeroengine applications because it provides the best combination of strength retention and oxidation resistance at high temperatures. In the present work, tensile creep and creep fracture behaviour of sintered SiC has been investigated. Creep tests have been performed under constant stress and temperature ranges from 125 to 400 MPa and 1673 to 1873 K respectively. The sintered SiC exhibits primary dominated creep curves and little or no tertiary stage in all cases studied. It is established that the SiC displays a

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4

Williams, T. "Development Of pressureless sintered silicon carbide-boron carbide composites for armour applications." Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/810348/.

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Ceramic armour must offer protection against armour piercing threats at low weight and affordable cost. As a possible means of improving armour, a range of SiC-B4C composites have been produced and characterised. The degree of contact between the two phases has been quantified and shown to have a strong effect on the densification and microstructure in these materials. This understanding has enabled independent variation of microstructural parameters which are normally interrelated. These were; porosity, SiC:B4C mass ratio, B4C distribution in a SiC matrix and SiC grain size distribution. To a

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5

Vargas-Gonzalez, Lionel Ruben. "Microstructural optimization of solid-state sintered silicon carbide." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/34691.

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In this work, the development of theoretically-dense, clean grain boundary, high hardness solid-state sintered silicon carbide (SiC) armor was pursued. Boron carbide and graphite (added as phenolic resin to ensure the carbon is finely dispersed throughout the microstructure) were used as sintering aids. SiC batches between 0.25-4.00 wt.% carbon were mixed and spray dried. Cylindrical pellets were pressed at 13.7 MPa, cold-isostatically pressed (CIP) at 344 MPa, sintered under varying sintering soaking temperatures and heating rates, and varying post hot-isostatic pressing (HIP) parameters.

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6

Maensiri, Santi. "Thermal shock resistance of sintered alumina/silicon carbide nanocomposites." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365329.

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7

Sallom, Zuhair Kamil. "Evolution of particle characteristics in sintered hard metal." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236236.

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8

Okeke, Christopher Igwedinma. "Threading and turning of aerospace materials with coated carbide inserts." Thesis, London South Bank University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297919.

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The first part of this study involve an evaluation of the performance of TiN and AlZ03 single layer coated cemented carbide tools when threading inclusion modified, 708M40T (En 19T) 817M40T (En 24T) and Jethete steels at high cutting conditions by monitoring tool wear, failure modes, post threading workpiece properties, micro and macro-surface alterations and subsurface microhardness variation of threaded surfaces. Test results show that flank wear was the dominant failure mode, increasing rapidly when machining at the top speed of 225 m min,l due to the high temperature generated which accele

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9

Lide, Hunter. "Processing-Structure-Property Relationships of Reactive Spark Plasma Sintered Boron Carbide-Titanium Diboride." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538698/.

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Sintering parameter effects on the microstructure of boron carbide and boron carbide/titanium diboride composites are investigated. The resulting microstructure and composition are characterized by scanning electron microscopy (SEM), x-ray microscopy (XRM) and x-ray diffraction (XRD). Starting powder size distribution effects on microstructure are present and effect the mechanical properties. Reactive spark plasma sintering introduces boron nitride (BN) intergranular films (IGF's) and their effects on fracture toughness, hardness and flexural strength are shown. Mechanical testing of Vickers h

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10

Lide, Hunter. "Processing-Structure-Property Relationships of Reactive Spark Plasma Sintered Boron Carbide-Titanium Diboride Composites." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538698/.

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Sintering parameter effects on the microstructure of boron carbide and boron carbide/titanium diboride composites are investigated. The resulting microstructure and composition are characterized by scanning electron microscopy (SEM), x-ray microscopy (XRM) and x-ray diffraction (XRD). Starting powder size distribution effects on microstructure are present and effect the mechanical properties. Reactive spark plasma sintering introduces boron nitride (BN) intergranular films (IGF's) and their effects on fracture toughness, hardness and flexural strength are shown. Mechanical testing of Vickers h

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11

Rubink, William S. "Processing-Structure-Property Relationships of Spark Plasma Sintered Boron Carbide and Titanium Diboride Ceramic Composites." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157631/.

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The aim of this study was to understand the processing – structure – property relationships in spark plasma sintered (SPS) boron carbide (B4C) and B4C-titanium diboride (TiB2) ceramic composites. SPS allowed for consolidation of both B4C and B4C-TiB2 composites without sintering additives, residual phases, e.g., graphite, and excessive grain growth due to long sintering times. A selection of composite compositions in 20% TiB2 feedstock powder increments from 0% to 100%, was sintered at 1900°C for 25 minutes hold time. A homogeneous B4C-TiB2 composite microstructure was determined with excel

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12

Toller, Lisa. "Alternative binder hardmetals for steel turning." Licentiate thesis, Uppsala universitet, Tillämpad materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-332451.

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The goal of this work is to understand how the wear and deformation mechanisms of hardmetalinserts change when the cobalt binder phase is replaced with a dierent metal or analloy. The focus is on inserts for steel turning. The work presented in this licentiate thesisconsists of the rst steps.Cobalt is the most common binder phase in hardmetal tools based on tungsten carbide asthe hard phase. Metallic cobalt powder, present during the manufacturing, has been associatedwith lung diseases and an increased risk for lung cancer if inhaled. Therefore it is importantto investigate alternative binders

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13

Pabit, Edgardo L. "Grain boundary and triple junction chemistry of silicon carbide sintered with minimum additives for armor applications." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0012140.

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14

Jin, Le [Verfasser]. "Ultra-low friction of sintered silicon carbide in aqueous tribological environment of mechanical seals / Le Jin." Aachen : Shaker, 2018. http://d-nb.info/1186590602/34.

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15

Nauyoks, Stephen Edwin. "Microstructure of nano and micron size diamond-SIC composites sintered under high pressure high temperature conditions." [Fort Worth, Tex.] : Texas Christian University, 2009. http://etd.tcu.edu/etdfiles/available/etd-10152009-102152/unrestricted/Nauyoks.pdf.

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16

Berglund, Lina. "The Effect of Cooling Rate on Sintered Cemented Carbides." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288541.

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Magnetic measurements are useful tools for quality control of cemented carbides. Previous work at Sandvik Mining and Rock Technology has shown that the coercivity increases with increased cooling rate during sintering for a specific grade. This study aims to investigate why the coercivity changes with the cooling rate and if this is true for other cemented carbide grades as well. Three different cemented carbide grades were sintered with different cooling rates and evaluated with coercivity, Cobalt-magnetic saturation and hardness measurements, and with microscopy and Electron Backscatter Dif

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17

Joshi, Kunal J. "OPTIMIZATION OF CUTTING CONDITIONS FOR SUSTAINABLE MACHINING OF SINTERED POWDER METAL STEELS USING PCBN AND CARBIDE TOOLS." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/379.

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Powder metals are becoming a popular choice in the automotive and other manufacturing industries because of their ability to meet wide ranging product functional requirements without compromising the performance of the product. They offer various advantages, including weight reduction, near net-shape processing capability, and their ability to be sintered to achieve desired properties in the end-product. However, in order to satisfy the product design requirements during manufacturing, they need to be machined to the required tolerances. Machining of powder metals is quite different to machini

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18

Lawson, Thomas Ryan. "Micro-Raman spectroscopy and dry turning evaluations of nanostructured diamond films deposited on tungsten-carbide lathe inserts." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/lawson.pdf.

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19

Radzevičiūtė, Joana. "Tekinimo plokštelių dėvėjimosi ir jį įtakojančių veiksnių tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100618_133958-94110.

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Tekinimas yra vienas iš svarbiausių metalo apdirbimo būdų detalių gamyboje. Tekinimo įrankis turi ypač didelę reikšmę šiame procese, jis pjaunamąsias savybes praranda dėl pjaunančiųjų briaunų ištrupėjimo, pjaunančiojo pleišto plastinės deformacijos ir ypač dėl peilio darbinio paviršių dilimo. Norint parinkti optimalius pjovimo rėžimus ir įrankius, reikia nustatyti pagrindinius veiksnius, turinčius įtakos tam procesui. Tad gamybinėje įmonėje atlikti aliumininių detalių apdirbimo, smulkiagrūdžio karbido tekinimo plokštelėmis stebėjimai, norint išsiaiškinti pagrindinius veiksnius turinčius įtakos

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20

Tamil, Alagan Nageswaran. "Textured insert for improved heat extraction in combination with high-pressure cooling in turning of superalloys." Licentiate thesis, Högskolan Väst, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-11738.

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Heat generated in a machining process is a common and critical obstacle faced in today's machining industries. The heat generated in the cutting zone has a direct negative influence on the tool life which, in turn contributes to increase the manufacturing costs. Especially, in machining of Heat Resistant Super Alloys, HRSA this is a very limiting factor. HRSA are capable of retaining their mechanical strength and hardness at elevated temperatures. This property is advantageous in the application in e.g. aero-engines but also a disadvantage, since it also lowers the machinability significantly.

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21

Lacerda, Felipe Soares. "Contribuição à usinagem de peças de metal duro sinterizado." Universidade de Taubaté, 2015. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=767.

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A necessidade de se usinar materiais de alta dureza e garantir bom acabamento superficial é um desafio para as atuais indústrias metal/mecânica. Além disso, coloca-se também a necessidade de fazê-lo de forma técnica e economicamente viável. Diante desse desafio o torneamento duro surge como uma opção. Com o uso dos parâmetros (velocidade de corte, avanço e profundidade de corte) e ferramentas adequadas o torneamento duro possibilita uma adequada rugosidade superficial e pode substituir a necessidade de retificação, simplificando e reduzindo custos no processo de fabricação. Para que seja possí

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22

Zhao, Yanan [Verfasser], Heinz [Akademischer Betreuer] Konietzky, Heinz [Gutachter] Konietzky, Jürgen [Gutachter] Knorr, and Guicheng [Gutachter] He. "Geomechanical aspects of Sintered Silicon Carbide (SSiC) waste canisters for disposal of high level radioactive waste / Yanan Zhao ; Gutachter: Heinz Konietzky, Jürgen Knorr, Guicheng He ; Betreuer: Heinz Konietzky." Freiberg : Technische Universität Bergakademie Freiberg, 2021. http://d-nb.info/1229692002/34.

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23

Bamford, Erik. "Tool wear in turning of titanium alloy Ti–6Al–4V : Challenges and potential solutions for crater wear, diffusion and chip formation." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306373.

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Titanium alloys are major materials used in the airplane industry, and prospects show that airplane production will double in the next 20 years. Consequently, the demand for cutting tools for machining of titanium alloys will increase. The primary problem when machining titanium alloys is their low thermal conductivity. Crater wear is the main factor limiting tool life, and is generally caused by thermal diffusion due to high temperatures in the tool-chip interface. This master’s thesis was performed in collaboration with Sandvik Coromant, with the prospect to increase knowledge of how diffusi

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24

Rosário, John Ferney Alvarez. "Avaliação da integridade da superfície no torneamento de um ferro fundido nodular com carboneto." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3132/tde-05092006-131535/.

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Neste trabalho, estudou-se a integridade superficial durante o torneamento de um ferro fundido nodular com carbonetos, considerando a heterogeneidade microestrutural (fração volumétrica, tamanho e morfologia de grafita e dos carbonetos) e os efeitos dos parâmetros de corte (avanço, velocidade de corte e profundidade de corte), baseados num planejamento fatorial fracionário 24-1. Este texto apresenta, numa primeira parte, uma revisão baseada em referências bibliográficas clássicas da engenharia de superfícies, na tentativa de definir os conceitos que compõem a integridade da superfície. Posteri

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25

Zdařil, David. "Technologie výroby vybraného sortimentu nástrojů s aplikací vysoce produktivního výrobního zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417150.

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The aim of this work is to analyze the issue of providing cutting tools for internal use in the company STERCH-INTERNATIONAL s.r.o. It is mainly the production and regrinding of end mills and drills for specific machining applications, whose benefit lies in increased efficiency and flexibility of production, which also brings a significant cost reduction.

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26

Öhman, Sebastian. "Wear on Alumina Coated Tools and the Influence of Inclusions when Turning Low-Alloy Steels : Master Thesis - Chemical Engineering." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302956.

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In this master thesis, performed at Sandvik Coromant Västberga (Stockholm), a comprehensive study has been made to investigate the wear on textured alumina (Inveio™) coated cutting tools when turning low-alloy steels. Specifically, wear studies have been made on tools’ rake faces when turning two separate batches of SS2541, after an initial turning time of 4 min. A particular focus has been given to elucidate what particular role the inclusions might have for the wear of the alumina coating onthe tools. Evaluation of tool wear has been made by employing several different analytical techniques,

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27

Pavézka, Vladimír. "Analýza dokončovacích způsobů obrábění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229963.

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This eleborate study is aimed at analysis of complete methods machining. There are characterized particular methods and their effect on the surface´s quality of machined area in this study. Concluding part of the study includes practical demonstration of machining by using cemented carbide-tipped tool and polycrystalline diamond and evaluation of this demonstration.

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28

Koen, Devan. "Investigation of novel cooling methods to enhance aerospace component manufacturing practices." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/18058.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: The aerospace industry actively pursues innovation, especially in materials and their use in new applications, to improve their aircraft as well as their competitive position. Ti-6Al-4V has been available now for more than 50 years. Yet, in the new generation of aircraft using structural composites, a dramatic increase in the proportion of Ti-6Al-4V will be seen along with emerging application in automotive and chemical industries. This material possesses superior material properties compared to conventional materials su

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29

Gonçalves, André da Motta. "Usinabilidade do carbeto de tungstênio no torneamento com ferramenta de diamante." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18146/tde-17042010-090833/.

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Este trabalho apresenta o estudo da usinabilidade do carbeto de tungstênio utilizando ferramenta de ponta única de diamante em máquina-ferramenta de ultraprecisão, em função de suas características de dureza e potencial uso para a fabricação de micromoldes. O carbeto de tungstênio foi submetido a testes de usinagem para a determinação dos parâmetros e condições de corte para a obtenção do regime dúctil. Com base nos resultados experimentais, concluiu-se que, para os avanços da ordem de 1 micrômetro/revolução, a profundidade de corte (AP) não influencia significativamente no resultado de rugosi

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30

Sudo, Tadeu Tomio. "Uma contribuição ao estudo do torneamento com alta velocidade." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-15032016-134826/.

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O material, metálico ferro fundido cinzento, é muito utilizado industrialmente, principalmente na área automobilística. Usinagem com alta velocidade tem sido uma tendência atual para aumentar a produtividade, com a possibilidade de se ober ótima qualidade superficial, possivelmente eliminando processos subseqüentes. Aliado à questão de qualidade ambiental, as operações de usinagem têm-se voltado para usinagem a seco ou com mínima quantidade de lubrificante (MQL - minimal quantity of lubricant). Este trabalho estuda o torneamento com alta velocdidade de ferro fundido cinzento GG25 através de us

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31

Meliani, Hasnaa. "Fonctionnalisation d'outils de décolletage de précision par micro-structuration de surface." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD022.

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L’usure des outils de coupe représente un problème majeur qui compromet la productivité et la capacité à réaliser des pièces de haute qualité. L’objectif de ces travaux de thèse est d’améliorer la durée de vie des outils coupants en carbure de tungstène, revêtus ou non, et destinés à l’usinage de l’acier inoxydable et de l’aluminium. La méthode de fonctionnalisation adoptée est la structuration de surface par laser femtoseconde.Dans un premier temps, une étude expérimentale qui traite de l’interaction entre le laser et le carbure de tungstène a été réalisée. Pour la première fois, tous les par

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32

Piwonski, Michael. "Keramische Membranen auf Basis LPS-SiC: Schlickerentwicklung und Beschichtungsverfahren." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1138049474013-12420.

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Die Filtration unter aggressiven Einsatzbedingungen, z.B. Einsatz in korrosiven Medien, Abgasfiltration, stellt besondere Anforderungen an das Filtermaterial. Sogenanntes &quot;Liquid Phase Sintered Silicon Carbide&quot; (LPS-SiC) erfüllt die Anforderungen sehr gut. Deshalb bestand das Ziel der Arbeit besteht darin, erstmals aus LPS-SiC asymmetrische keramische Membranen (grobporöses Substrat mit dünner, feinporiger Membran) herzustellen. Als Additivsystem fanden Yttriumoxid und Aluminiumoxid Verwendung. Es wurde Siliciumcarbid der Körnung F1200 auf Substrat der Körnung F500 abgeschied

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Marques, Armando. "Torneamento de Inconel 718 com aplicação de lubrificantes sólidos." Universidade Federal de Uberlândia, 2015. https://repositorio.ufu.br/handle/123456789/14776.

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Fundação de Amparo a Pesquisa do Estado de Minas Gerais<br>The nickel-based superalloys have a high mechanical strength which remains at elevated temperature, high creep and fatigue resistances and excellent oxidation resistance. This makes these alloys highly recommended for use in high temperature working environments such as mechanical components for the aerospace industry. However, these characteristics are major problems when machining them, as it promotes high heat generation in the flow zone, resulting in the development of high wear rates on the cutting tools. In order to reduce the pr

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34

Andrews, Anthony. "Electrochemical corrosion measurement of solid state sintered silicon carbide (SSiC) and liquid phase sintered silicon carbide (LPSSiC) ceramic materials." Thesis, 2006. http://hdl.handle.net/10539/1721.

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Student Number : 0405740V - MSc (Eng) dissertation - School of Chemical and Metallurgical Engineering - Faculty of Engineering and the Built Environment<br>Silicon carbide ceramics have many attractive properties, one of which is their high degree of corrosion resistance. Even though corrosion is slow, it does occur. Standard procedures for corrosion testing such as the immersion method is limited due to the low corrosion rates of most of these materials: it does not elucidate the mechanism of corrosion, but only gives the rate and degree of dissolution. Electrochemical techniques offer the

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35

Can, Antionette. "Densification, microstructure and properties of liquidphase sintered silicon carbide materials." Thesis, 2006. http://hdl.handle.net/10539/172.

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PhD - Science<br>The relationships between densification and microstructure, and between microstructure and mechanical and electrical properties of liquid phase sintered silicon carbide were studied in detail using hot pressing, gas pressure sintering and ultra–high pressure sintering techniques. Silicon carbide was sintered with 10 mass-% addition of the Y2O3-Al2O3 system, with various molar ratios. Hot pressing was carried out at 1925oC under 30 MPa, in argon, for half an hour. Materials were gas pressure sintered at 1925oC, under a final gas pressure of 80 bars (8MPa), in argon, for a

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Lin, Chih-Hsien, and 林志賢. "Effects of additives on characteristic properties of sintered boron carbide." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/36p3z6.

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37

Rahman, Arif. "Bulk and nano-scale characterization of polymer derived silicon carbide and comparison with sintered silicon carbide." 2009. http://digital.library.okstate.edu/etd/Rahman_okstate_0664M_10502.pdf.

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38

Liu, Che-Yuan, and 劉哲原. "Study on the Mechanical Properties and Ballistic Performance of Liquid Phase Sintered Silicon Carbide." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/03936140588285853546.

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博士<br>國立臺灣大學<br>材料科學與工程學研究所<br>103<br>Ceramics exhibit excellent ballistic performance. However, many large cracks are formed after being hit by bullet for their brittle nature. The multi-impact protection ability of ceramics is thus limited. In the present study, a liquid-phase sintered silicon carbide (LSC) was prepared for the applications as ceramic armor. Its microstructure-ballistic performance relationships are established. The controlling factors for ballistic performance under single-hit and multi-hit are investigated. The design principles for ceramic armor are then proposed. More im

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39

Liou, Pin-You, and 劉品佑. "Effect of additives of TiB2-riched mixture on characteristic properties of sintered boron carbide." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/f4hpb7.

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碩士<br>國立臺灣海洋大學<br>材料工程研究所<br>108<br>The research aims of fabricate the body of boron carbide(B4C) ceramic marterial by using pressureless sintering method preformed separately with mix sintered aids (TiB2, TiB2-ZrB2, TiO2, ZrO2) of various Zr/Ti ratio (0, 0.17, 0.36, 0.56 and 0.78) under distinct sintering temperatures (2200ºC, 2250ºC). The sintered ceramic bodies were subsequently carried out the measurement of density and Vickers hardness, the x-ray diffractometer (XRD) examination as well as scanning electron microscope (SEM). After XRD analysis, the results showed that the secondary phase(

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Sarma, Sushanta. "Parametric optimization of turning operation on stainless steel using a carbide tool." Thesis, 2011. http://ethesis.nitrkl.ac.in/2418/1/Thesis_submitted_by_107ME016.pdf.

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The term microturning is used to refer to operation processes occurring at dimensions of 1 to 999 micrometres. Stainless steel is a widely used material in day to day applications. In this case, a carbide tool has been used to machine stainless steel. The machining parameters are cutting speed, feed and depth of cut. The main aim is to understand the optimum settings of these parameters to reduce the machining forces, namely the feed force, the thrust force and the cutting force. To better understand these effects, experiments were carried out on a lathe and the machining forces measured with

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Rout, Sarbeswar. "Parametric Optimization of Turning Operation on Stainless Steel Using a Carbide Tool." Thesis, 2013. http://ethesis.nitrkl.ac.in/5428/1/109ME0410.pdf.

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Microturning is the turning process which involves machining of work pieces at a dimension of 1 to 999 micrometers. As stainless steel is one of the most important and widely used materials in these days; so it is being chosen as the work piece material. The machining parameters are chosen to be cutting speed, feed and depth of cut. The main aim of the experiment is to minimize cutting forces (feed force, the thrust force and cutting force). The aim of the experiment is to minimize the forces, to reduce the chip thickness, to reduce the surface roughness and to reduce the tool wear. The experi

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shing, Zheng shih, and 鄭世欣. "Sintering temperature and carbide content on the sintered microstructures and properties of Ni60-WC-Cr3C2." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/67474230231085767383.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>104<br>In this study, sintered Ni60-WC-Cr3C2 composites with different carbide concentrations were processed at different temperatures. There are three parts in this study. In the first part, the specimens were analyzed by scanning electron microscope (SEM) to examine the densification behavior, and XRD and EDXA to examine the constituting phases. In the second part, Optimization of the hardness was achieved by plotting the broken-line graph of carbide concentration, temperature and hardness. In the last part, the optimized composite in the second part were tested by

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Kisku, Ram Chandra. "Modelling of temperature profile in turning with uncoated and coated cemented carbide insert." Thesis, 2011. http://ethesis.nitrkl.ac.in/2501/1/ram_btech_thesis.pdf.

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Determination of themaximum temperature during machining process and its distribution along the rake surface is of much importance as it influences the tool life as well as the quality of machined part. The power consumed in metal cutting during turning operation was largely converted into heat.Continuous or steady state machining operations like orthogonal cutting are studied by modelling the heat transfer between the tool and chip at the tool rake surface contact zone. The shear energy is created in the primary zone, where the main plastic deformation takes place, second at the chip tool i

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Zhao, Yanan. "Geomechanical aspects of Sintered Silicon Carbide (SSiC) waste canisters for disposal of high level radioactive waste." 2020. https://tubaf.qucosa.de/id/qucosa%3A74150.

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High-level radioactive waste (HLW) poses threat to the biosphere. Geological disposal is accepted as a safe way for HLW disposal. Waste canisters made of Sintered Silicon Carbide (SSiC) are proposed and geomechanical safety aspects relating to such SSiC canisters are investigated. First part of the thesis reviews the state-of-the-art and demands for HLW disposal. The reason for considering Silicon Carbide (SiC) as canister material is explained. Especially in terms of corrosion and lifetime, ceramics and especially SiC is superior to metals or concrete. The only concern is its brittle behavio

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Sahu, Supriya. "Performance evaluation of uncoated and multi layer TiN coated carbide tool in hard turning." Thesis, 2012. http://ethesis.nitrkl.ac.in/4055/1/Thesis_Word.pdf.

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Hard coatings are well known to improve the performance of cutting tools in machining applications, such as high-speed machining and machining of MMC etc. Unfortunately, the development of cutting tool for high-speed machining of hard and difficult-to-cut material has remain a problem for quality and economy of production. The present work studies the performance of multi layer coated tool in machining of hardened steel ( AISI 4340 steel ) under high speed turning and compared with that of uncoated tool. Also the soft aluminium and soft and abrasive (Al+5% Si) were turned using CNC lathe. T

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Huang, Yi-Lun, and 黃宜倫. "A study on chip breaker design of tungsten carbide inside-hole rough turning tools of the cutting force of turning medium carbon steel." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/82539262420687626248.

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碩士<br>國立宜蘭大學<br>機械與機電工程學系碩士班<br>101<br>The inner hole cutting forces by using lathe tool for medium carbon steels are well studied. The inner hole cutting forces with different trip's rake angles associated with different chip breaker widths are examined by dynamometer by using different feed rates and different cutting depths. The results show that the inner hole cutting forces for the lathe tool with rake angle are less than the lathe tool without rake angle. The cutting forces for the chip breaker within 1～3mm of the 25° rake angle lathe cutter are the smallest. Even the feed rate lower

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Liu, Tzuan-Horng, and 劉醇鴻. "The tribological characteristics and turning performance of chromium carbide films deposited by unbalanced magnetron sputtering." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/95029496588609317955.

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碩士<br>國立成功大學<br>機械工程學系<br>89<br>The tribological characteristics and cutting performance of indexable inserts with chromium carbide films deposited by unbalanced magnetron sputtering were discussed in this thesis. At first, for complete understanding of properties and structures of chromium carbide films, the experiments of micro-hardness tester, scratch tester, SRV tester and SEM…etc were employed. Indexable inserts with chromium carbide films were applied to turning S45C medium carbon steel、copper and 6061 aluminum alloy. The influence of the thickness and the chromium content in chromium ca

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Yan-Fu, Lin, and 林焰福. "A Study on Chip Breaker Design of Tungsten Carbide Tools for Turning Medium Carbon Steel." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/52334210606834730022.

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碩士<br>國立宜蘭大學<br>機械與機電工程學系碩士班<br>100<br>The study mainly develops the sharp corner turning tool with a ladder-type chip breaker; the dynamometer to measure the three-dimensional cutting forces of the actual turning , to set the width and the side slope angle of chip-breaker, the tool is used to discuss the relationship between depth and feed in cutting, thus , improving the geometry and angle of chip-breaker, to reduce the cutting force and processing requirements to achieve better so that the cutting tool has the function of chip-breaker and reduces the cutting forces to improve the processing

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Lin, Y. C., and 林炎成. "THE RESEARCH OF INFLUENCES OF ELECTRO-DISCHARGE ENERGY TO E.D. M. CHARACTERISTICS AND BENDING STRENGTH OF SINTERED CARBIDE." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/45859038429652683986.

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碩士<br>國立中央大學<br>機械工程研究所<br>83<br>Because the low thermal conductivity of sintered carbide, it is easy to crack at the surface during E.D.M.. It influences the life and presision of tool and mold severely. In experiments, we change the parameters of E.D.M. to examine the crack state and bending strength of materials due to electro-discharge Experiments show that the material removal rate is better at higher electro-discharge energy density during machining P and K kind sintered carbide, but

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Rokebrand, Patrick. "Spark plasma sintered nanostructured ceramics for bio ceramic applications: Titanium carbide and titanium nitride in an alumina matrix." Thesis, 2013. http://hdl.handle.net/10539/12527.

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