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Dissertations / Theses on the topic 'Quality casting'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Mahapatra, Rama Ballav. "Mould behaviour and product quality in continuous casting of slabs." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29214.

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An extensive study has been conducted to elucidate mould behaviour and to examine its influence on product quality during continuous casting of slabs. The study essentially comprised of industrial measurements, mathematical modelling and metallographic examination. The industrial measurements consisted of mould temperature measurements; an operating slab mould was instrumented with 114 thermocouples and the temperature of the mould at different locations was successfully measured for a wide range of casting conditions. A three-dimensional heat flow model of the mould was developed to quantitat

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2

Cao, Xinjin. "Heat treatment of liquid metal : precipitation and sedimentation processing of liquid Al-11.5Si-0.4Mg alloy." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369168.

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3

Bommaraju, Ramaprasad V. "Mold behavior, heat transfer and quality of billets cast with in-mold electromagnetic stirring." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28628.

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Mold behavior, mold-related quality and the columnar-to-equiaxed transition influenced by in-mold EMS were examined by performing trials at two steel companies, metallurgical examination of the billet samples and mathematical modelling. The thermal fields in the walls of billet molds (102 X 102mm and 127 X 178mm) and in the cooling water were monitored by a system of thermocouples as the EMS was switched on and off during the continuous casting of several heats. The effect of electro-magnetic stirring on mold heat extraction was found to be negligible. The mold temperatures and cooling water t

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4

Slagter, Alejandra. "Advanced Inspection of Surface Quality in Continuously Cast Products by Online Monitoring." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70634.

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5

Bouhouche, Salah. "Contribution to quality and process optimisation in continuous casting using mathematical modelling." Doctoral thesis, [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966041208.

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6

Bouhouche, Salah. "Contribution to quality and process optimisation in continuous casting using mathematical modelling." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola&quot, 2009. http://nbn-resolving.de/urn:nbn:de:swb:105-6900128.

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Mathematical modelling using advanced approach based on the neural networks has been applied to the control and the quality optimisation in the main processes of steelwork such as the ladle metallurgical treatment and continuous casting. Particular importance has been given to the improvement of breakout prediction system and the reduction in the rate of false alarm generated by the conventional breakout detection system. Prediction of the chemical composition and temperature of liquid steel in the ladle has been achieved by neural networks and linear model. This prediction can be considered a

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Battaglia, Eleonora. "Correlations between defect content, microstructure and casting quality in HPDC AlSi alloys." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3427147.

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Two are the key players of this doctoral thesis: secondary AlSi alloys and the High Pressure Die Casting (HPDC) process. As the levels of CO2 and other greenhouse gasses increase, the industry sector is called to reduce the emissions produced and to contain the energy consumptions. Therefore, secondary Al ingot production shows a 6% annual rate growth, mainly drawn by the transport sector. In particular, automotive industry and, in general, transportation one increasingly needs light components in order to reduce total weights and therefore limit harmful emissions and fuel consumption. To

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8

Fiorese, Elena. "Process parameters affecting quality of high-pressure die cast aluminium alloys." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3426773.

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High pressure die casting (HPDC) is a widely used process for manufacturing components with high production rate and complex geometries. However, high pressure die casting is still considered a “defect generating process”, since an amount of 5-10% of scrap is usually detected in castings. For this reason, the availability of new standards and tools for optimizing the process is one of the prominent needs of foundry field. Both these issues are tackled in this Thesis. First, a new classification of defects and reference dies for estimating the static mechanical properties of aluminium alloys

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9

Saleem, Saud. "On the surface quality of continuously cast steels and phosphor bronzes." Doctoral thesis, KTH, Metallernas gjutning, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187718.

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This thesis work concerns about the importance of the cast surfaces, surface phenomenon such as the formation of the oscillation marks and exudation and related defects including cracks and segregation that happened during the continuous casting. All of the investigated materials were collected during the plant trials while an in-depth analysis on these materials was performed at the laboratory scale with certain explanations supported by the schematic and theoretical models. The work consists on different material classes such as steels and phosphor bronzes with a focus on the surface defects

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10

Bakir, Berna. "Defect Cause Modeling With Decision Tree And Regression Analysis: A Case Study In Casting Industry." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608427/index.pdf.

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In this thesis, we study improvement of product quality in manufacturing industry by identifying and optimizing influential process variables that cause defects on the items produced. Real data provided by a manufacturing company from the metal casting industry were studied. Two well-known approaches, logistic regression and decision trees, were used to model the relationship between process variables and defect types. The approaches used were compared.

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Timelli, Giulio. "Correlation between processing and quality of aluminium alloy castings (Correlazione tra parametri di processo di fonderia e qualità dei prodotti)." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425051.

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The influence of processing and process parameters plays a key role for the Aluminium foundry and transport industries as it affects the quality and soundness of the cast products. Particularly, the choice of a process chain in Aluminium foundry, otherwise of process parameters, influences the reject rates, hence casting costs, the process yield and the production rate. The process chain in Aluminium foundry is a complex sequence of processes and the final casting quality depends on many parameters. Several aspects of this subject are still not fully understood. The motivation of the research

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12

Pelayo, Chagoya Graciela. "Development of a knowledge based system for the control of 319-Al melt quality and prediction of casting characteristics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62264.pdf.

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13

Pinheiro, Carlos A. M. "Mould thermal response, billet surface quality and mould-flux behaviour in the continuous casting of steel billets with powder lubrification." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq27226.pdf.

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14

Dewhirst, Brian A. "Optimization of the heat treatment of semi solid processed A356 aluminum alloy." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-111705-111503/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: microstructure; casting; Fluid Bed; Quality Index; Aluminum; A356; heat treatment; SSM; Semi Solid Metal Includes bibliographical references. (p.105-106)

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15

Bjurenstedt, Anton. "On the influence of imperfections on microstructure and properties of recycled Al-Si casting alloys." Doctoral thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Material och tillverkning – Gjutning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36963.

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There are great energy savings to be made by recycling aluminium; as little as 5% of the energy needed for primary aluminium production may be required. Striving to produce high quality aluminium castings requires knowledge of microstructural imperfections, which is extra important when casting recycled aluminium that generally contains higher levels of imperfections compared to primary aluminium. Imperfections include amongst others Si, Fe, and Mn as well as oxides. Si is needed for castability, but it may also initiate fracture. There are different types of Fe-rich intermetallics influencing

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Abdalrahman, Khalid Haroun Mohamed [Verfasser], and Eckehard [Akademischer Betreuer] Specht. "Influence of water quality and kind of metal in the secondary cooling zone of casting process / Khalid Haroun Mohamed Abdalrahman. Betreuer: Eckehard Specht." Magdeburg : Universitätsbibliothek, 2012. http://d-nb.info/1053914369/34.

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Abdalrahman, Khalid Haroun Mohamed Verfasser], and Eckehard [Akademischer Betreuer] [Specht. "Influence of water quality and kind of metal in the secondary cooling zone of casting process / Khalid Haroun Mohamed Abdalrahman. Betreuer: Eckehard Specht." Magdeburg : Universitätsbibliothek, 2012. http://nbn-resolving.de/urn:nbn:de:gbv:ma9:1-2685.

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18

Динник, Оксана Дмитрівна, Оксана Дмитриевна Дынник, Oksana Dmytrivna Dynnyk та А. Морщ. "Розробка методики оцінювання якості продукції ливарного виробництва". Thesis, Видавницто СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/20981.

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Динник, Оксана Дмитрівна, Оксана Дмитриевна Дынник, Oksana Dmytrivna Dynnyk та І. Максименко. "Конструктивні і технологічні чинники формування якості продукції ливарного виробництва". Thesis, Видавницто СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/20948.

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20

Polyakova, Irina. "Untersuchung der kognitiven Modellierung zur Gussstückqualitätsverbesserung." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-130996.

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Als Ergebnis der vorliegenden Arbeit wurde ein nützliches Hilfsmittel auf der Basis der kognitiven Herangehensweise zur Verbesserung der Effizienz der Managemententscheidungen für die Gussausschussverringerung und Qualitätsverbesserung in den Gießereien entwickelt. Das Werkzeug hilft dem Technologen, den Mechanismus des Gussfehlerentstehungsprozesses aufzudecken, die Logik der Gussfehlerentstehung zu verstehen und die präventiven Maßnahmen zu testen. Man kann das Werkzeug täglich im Betrieb benutzen, um die strategischen und operativen Entscheidungen rasch und ohne Durchführung der kostspielig

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21

Ren, Qizheng. "The Application of Gage R&R Analysis in s Six Sigma Case of Improving and Optimizing an Automotive Die Casting Product’s Measurement System." TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1536.

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With the rapid development of automation technology in automotive manufacturing processes, massive and efficient production is a current trend. Therefore, measurement systems with accurate and automated measuring instruments are sought by automotive companies and suppliers. However, the problematic measuring instruments with unreliable accuracy and stability lead to erroneous measurements and wrong quality decisions that cause manufacturers huge profit losses. An effective method called “measurement system analysis” can be applied to define and eliminate erroneous measurements to ensure adequa

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Rozman, Jiří. "Nástroje jakosti pro hodnocení tlakově litých odlitků z Al slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230926.

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The goal of this diploma thesis is to on a practical example, with use of the quality system, describe the current state of input casting inspection in Tribotec Ltd. and output casting inspection of casting suppliers in this company and to suggest a new way of output casting inspection on Tribotec Ltd. with higher quality of spoilage rate survey of supplying casting already at the input inspection stage.

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23

Jaradeh, Majed. "The Effect of Processing Parameters and Alloy Composition on the Microstructure Formation and Quality of DC Cast Aluminium Alloys." Doctoral thesis, KTH, Materialvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4205.

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The objective of this research is to increase the understanding of the solidification behaviour of some industrially important wrought aluminium alloys. The investigation methods range from direct investigations of as-cast ingots to laboratory-scale techniques in which ingot casting is simulated. The methods span from directional solidification at different cooling rates to more fundamental and controlled techniques such as DTA and DSC. The microstructure characteristics of the castings have been investigated by optical and Scanning Electron microscopy. Hardness tests were used to evaluate the

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24

Abdullah, Eva. "Untersuchungen zwischen Belastungen und Belastbarkeiten beim Herstellen tongebundener Formen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-151086.

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Im Rahmen der vorliegenden Arbeit wurde versucht, Gesetzmäßigkeiten zwischen Kenngrößen aus dem Formstofflabor und einer praxisnahen kleintechnischen Formanlage abzuleiten. Der Zweck besteht darin, einen Fehler bei der Formherstellung (insbesondere Ballenabrisse) zu vermeiden. Dazu wurden zahlreiche Untersuchungen sowohl im Formstofflabor als auch an der Versuchsanlage vorgenommen. Dies gleicht in ihrer Funktionsweise betrieblichen Formanlagen mit unterschiedlichen Verdichtungsmöglichkeiten. Bei den Untersuchungen wurden Formstoffzusammensetzungen variiert, konstruktive Änderungen an der Formm

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Mercklé, Jean. "Stratégies de détection de rupture de modèle appliquées à la recherche et à la localisation des défauts sur des produits sidérurgiques." Nancy 1, 1988. http://www.theses.fr/1988NAN10047.

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Élaboration de deux stratégies de "détection-localisation" de défauts dans les signaux issus du contrôle par courants de Foulcault des produits sidérurgiques. Validation de ces stratégies dans le contrôle qualité de trois procédés : élaboration de brames de coulée continue, élaboration de blooms de coulée continue et de tubes

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Khaled, Iman. "A study of some of the foundry processing factors influencing the quality of titanium alloy investment castings." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5989/.

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Titanium aluminide alloys are prone to extensive shrinkage porosity, particularly interdendritic layer porosity. This research aims to develop a better understanding of shrinkage porosity in Ti-46Al-8Nb alloy and how to minimize it. Practical measurements in conjunction with computer simulations were carried out in order to study the effects of cooling rate and temperature gradient on shrinkage porosity in Ti-46Al-8Nb investment castings, through investigating the influence of casting geometry, specifically mould taper on cylindrical bars, and preheating mould temperature on the macrostructure

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Дячок, Дарія Романівна. "Оптимізація технологічного процесу відтворення художніх виробів у металі". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/43657.

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Дипломна робота: 86 с., 20 рис., 30 табл., 16 посилань. Мета роботи – оптимізація технологічних процесів відтворення у металі копій двох художніх виробів за наявними неметалевими оригіналами. Методика дослідження – виготовлення силіконових та гіпсових прес-форм із різними варіантами ливникової системи; виготовлення гіпсо кремнеземистих ливарних форм, їх прожарювання та заливання при різних температурах; контроль параметрів якості виливків (шорсткість поверхонь та наявність ливарних дефектів). Результати та їх новизна – теоретично і практично установлено придатність силіконових п

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Krejčí, Martin. "Nedestruktivní zkoušení odlitků ozubených kol." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228720.

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This diploma thesis resolves aplication of particular non-destructive testing methods while producing castings of steel wheels and quality control of this process. There are described fundamentals of flaw detection, determination of flaw-generation cause and suggestions for optimalization of casting process and increasing of its quality.

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Lim, Tiong-wei, and 林長偉. "Quality evaluation of AZ91D recycling magnesium alloy in die-casting process." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86721732930185342635.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>95<br>In general die casting factory, large volume of recycling AZ91D magnesium alloy materials were used. Although the recycled manufacturing supplier’s materials meet the standard norm, due to the difference of recycled material used the quality of the die casting parts was influenced widely and the understanding of the causes are limitedly. The main purpose of this research is to understand the influences of recycling AZ91D magnesium alloy to the mechanical property and corrosion resistance of the die casting parts. By choosing three existing reputed brand AZ91D m

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LEE, SANG-HUNG, and 李尚紘. "Combining Taguchi and DMAIC approaches to improve aluminum die-casting quality." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/87452695735679575096.

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碩士<br>國立勤益科技大學<br>工業工程與管理系<br>101<br>The research will combine Taguchi and DMAIC approach, applies to Aluminum Casting so as to establish best parameters module, process improvement and reduce defects. First of all, Casting is the key target as set in order to increase profit and capability for competition as the company is looking for; secondly, we will apply Taguchi Method and combine 5 steps DMAIC of 6Sigma to improve casting process for product of Power Tools Industry than old fashion Try and Error so as to generate cost reduction, improve quality of product and capability for competition

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Shen, Po-Chien, and 沈伯鍵. "An Investigation on Process Quality Improvement for Melt-Casting of Explosive." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/f4pt39.

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碩士<br>義守大學<br>機械與自動化工程學系<br>107<br>At present, the production of large-calibre ammunition in military Arsenals is mainly based on the method of melt casting and pressing the explosives. The melt-casting shells must eliminate bubbles and porosity by probing process, and then it is solidified by the cooling process. The purpose of this study is to explore the best filling methods and equipments, and to improve the safety of production processes and equipment, so we can produce smoothly ammunition and reduce ammunition defects and critical factors in the production process. The Old equipment adop

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Wu, Chin-Chang, and 吳錦昌. "A Study of Centrifugal Casting Process Quality Improvement through Six Sigma Approach." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/37277196572016780928.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>100<br>Casting is the basic of traditional industries, the products widely applies in defense, medicine, steel, cement, petrochemical, electric power, shipbuilding, electronic, machinery, construction and so on. With the globalization of the competitive market, the casting already has been in the open international environment, with the newly-emerging nation develops fast, like the China and Southeast Asia where by the extremely low labor cost superiority caused the greatest impact on the domestic casting industry. The current important topic is how to promo

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Kao, Kai-Wei, and 高楷為. "Applying Quality Engineering Methods to Reduce Sand Inclusions in Investment Casting Industry." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4q54p6.

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Yang, He-Kai, and 楊賀凱. "Supporting Quality of Service and Mobility Management of Media Casting over Wireless Networks." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/22416354018316039251.

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碩士<br>國立臺灣大學<br>資訊管理學研究所<br>94<br>With the widely deployed wireless networks, people have another choice to access the Internet. Therefore, many applications originally provided on wired networks will be used over wireless environment, and multimedia services may be the most popular one in the near future. Delivering multimedia content via multicast in our system saves unnecessary bandwidth wastage and uses limited wireless resource more efficiently. Besides, we compress video content through the adaptive mechanism─scalable video coding according to the video quality users need. However, nodes

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Chiao, Tsai-Meng, and 蔡孟樵. "The Effect of Dispersion and Defoaming-use Surfactant on the Various Properties of Coating and Casting Surface Quality for the Evaporative Pattern Casting Process." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/62245164386069421779.

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碩士<br>逢甲大學<br>機械工程學所<br>99<br>Evaporative Pattern Casting process is a special method of casting. In this process, the coating properties (permeability, adhensive property, crack resistance, erosion resistance, foaming property, and settlement property), have a significant affect on casting surface quality. The objective of this research is to investigate the effect on the coating properties and casting surface quality of adding dispersion-use and deforming-use surfactant to the coating. Firstly, to adopt the coating without surfactant addition (Type1) to investigate the various properties (p

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Farahani, Alavi Forouzandeh. "In-line Extrusion Monitoring and Product Quality." Thesis, 2010. http://hdl.handle.net/1807/29967.

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Defects in polyethylene film are often caused by contaminant particles in the polymer melt. In this research, particle properties obtainable from in-line melt monitoring, combined with processing information, are used to predict film defect properties. “Model” particles (solid and hollow glass microspheres, aluminum powder, ceramic microspheres, glass fibers, wood particles, and cross-linked polyethylene) were injected into low-density polyethylene extruder feed. Defects resulted when the polyethylene containing particles was extruded through a film die and stretched by a take-up roller as

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Chien, Chuan-kuo, and 錢傳國. "Building of a Quality System for the Casting Industry:the case of A Mechanical Company." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/65458148022136186362.

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碩士<br>國立高雄大學<br>高階法律暨管理碩士在職專班(EMLBA)<br>100<br>Casting industry is called 3K industry in Taiwan because its work circumstance with the potential danger : kitsui、kitanai and kiken (in Japaness) etc. What is the direct way to improve the work circumstance and uncertain quality is that building up a set of good system for improvement and standard flow. Making use of standard flow prevents and improves the potential danger of work circumstance to standardize the process and increase the product quality. Taiwan manufacturing level obtains a good evaluation from the international, specially mechanic

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Weijia, Shi, and 施韋嘉. "A Study of Machining Dimension Stability and Casting Defects with Quality Control and Analysis." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/65194510524823018245.

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碩士<br>中州科技大學<br>機械與自動化工程系<br>103<br>Abstract In recent years, fraction defective rate of machining company casting products can be broadly divided into three types, (1) castings (2) tool wear (3) poor processing, resulting in defective products. Tangible losses such as heavy industry, painting, renewal or even scrapped and intangible losses that must spend a higher cost with the company. Also delayed delivery will decrease the credibility of the company. In order to enhance and improve the company's casting and machining production quality and efficiency. Studied and analyzed the reasons of d

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Lungu, Chozi Vincent. "Sustainable production of quality bronze alloy bearings in under-resourced small scale casting facilities." Thesis, 2020. https://hdl.handle.net/10539/31286.

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A thesis submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in fulfilment of the requirements for the degree of Doctor of Philosophy, 2020<br>There are good reasons to keep the local economy of the Copper belt in Zambia growing. Mining consumables and spares that can be manufactured locally such as bronze sleeve bearings is one way of doing so and can benefit local people a great deal. Bronze sleeve bearings of a fit for purpose quality can to a large extent be cast in a small under-resourced foundry (SURF) sus

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Kumar, Sunil. "An expert system to diagnose quality problems in the continuous casting of steel billets." Thesis, 1991. http://hdl.handle.net/2429/1671.

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Quality problems, such as cracks, rhomboidity and breakouts are often observed in continuously cast steel billets. Although information is available in the literature on the causes of, and solutions to, these problems, the transfer of this knowledge to operating personnel is not always an easy task. To address this issue, an expert system has been developed. The important features of knowledge engineering an expert system to diagnose quality problems in the continuous casting of steel billets are described in this thesis. The process used to extract knowledge from the Experts, the experiments

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Huang, Jong-Yu, and 黃炯瑜. "The Effects of Casting Condition on the Dimensional Accuracy and Surface Quality of EPC Process." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/20318581515401146877.

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碩士<br>逢甲大學<br>機械工程研究所<br>85<br>ABSTRACT The shape design, making condition , and casting condition etc., of the pattern used in the EPC process, will affect the quality and dimensional accuracy of the casting after poured. So that how to control and how to make the pattern to have the various good characteristics, and how to control the casting condition, in order that the castings have good quality and dimension accuracy after poured, is a very important thing. This study is to probe into

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Bouhouche, Salah [Verfasser]. "Contribution to quality and process optimisation in continuous casting using mathematical modelling / vorgelegt von Salah Bouhouche." 2002. http://d-nb.info/966041208/34.

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Meenken, Thomas. "Analysis of the cooling capacity of water as a function of its quality during DC casting." Thèse, 2003. http://constellation.uqac.ca/750/1/17771752.pdf.

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As in many thermal processing technologies, there is a delicate balance between productivity and quality during ingot cooling process. Higher cooling velocities increase productivity but also create higher temperature gradients inside the ingot. Such a fast cooling does not leave sufficient time to establish the equilibrium within the solid, thus in the most affected surface layer the composition and crystalline structure are different from those in the bulk metal. The heat flux plays a particular role for the production of alloys where different melting points and complex structure formation

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Cho, Wang-tzu, and 卓琬姿. "Improving the Process Quality of Investment Casting Industry via Six Sigma－A Case Study of B Company." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/666m6z.

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碩士<br>國立雲林科技大學<br>工業工程與管理系<br>103<br>Chinese's manufacturing sector, the most important competition in the market, subject to the same competition, in order to break through price competition, improve product quality and highest priority, therefore, the importance of the quality of attention. Business managers can no longer be past the old norms to judge the quality problem, you should have to face up to the current quality problems, introducing appropriate improvement methods. With the advancement of technology faces major companies, the relative quality of the process followed to enhance, re

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Wu, Tsung-Yen, and 吳宗諺. "The Effects of Casting Parameter of the In-mold Process on the Quality of Ductile Cast Iron." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/41600212990785076011.

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碩士<br>逢甲大學<br>機械工程學所<br>94<br>The objective of this research is to focus on the manufacturing of furan resin mold ductile cast iron by using the In-mold Process. Casting parameters (addition amount and grain size of nodulant, pouring temperature, the use of cloth filter etc.,) on the mechanical properties (tensile strength , elongation , hardness , impact value etc.,) and metallographic microstructures (nodularity, count of nodule , matrix etc.,) of the ductile cast iron were investigated in this research. The results of this study indicate that ： (1) when the addition amount of nodulant is 1

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Lee, Gumn-Ben, and 李冠伻. "The Influence of Furan's Molding Parameters to the Properties of Mold and the Quality of the Casting." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/70601773757709248212.

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碩士<br>國立臺灣師範大學<br>工業教育研究所<br>88<br>Abstract The continuous discovery of new materials and methods has brought about a lot of change in the foundry industry. For instance, the emerging of the Furan No Bake process has gradually not only become the principal method for large-sized castings, but also been accepted extensively in the foundry industry with its characteristics of convenience and cleanliness. In the purposes of finding out the best combination of new sand and reclamation sand, and then reaching the demand of the most economical making process and the best qual

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Li, Cheng-Lung, and 李正隆. "The Quality Change Of Molten Aluminum Alloy After Flowing Through The Ceramic Foam Filter In Gravity Casting." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/35553263310024679491.

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碩士<br>國立聯合大學<br>材料科學工程學系碩士班<br>101<br>Ceramic foam filter is normally applied in the design of runner system in aluminum gravity casting. The purpose of using this filter is to reduce the velocity of liquid aluminum under the so-called critical gating velocity (e.g., 0.5 m/s for aluminum alloys). After liquid aluminum flows through the foam filter, its static pressure energy is recovered from kinetic energy. The foam filter then can be used for stabilizing the aluminum flow during the filling of mold cavity. The so-called bi-film defect, deriving from the surface turbulence and the entrapment

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Camisani-Calzolari, Ferdinando Roux. "Quality prediction and control of continuously cast slabs." Thesis, 2003. http://hdl.handle.net/2263/24938.

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Please read the abstract (Summary) in the section, 00front of this document<br>Thesis (PhD (Electronic Engineering))--University of Pretoria, 2008.<br>Electrical, Electronic and Computer Engineering<br>PhD<br>unrestricted

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Pinheiro, Carlos A. M. "Mould thermal response, billet surface quality and mould-flux behaviour in the continuous casting of steel billets with powder lubrication." Thesis, 1997. http://hdl.handle.net/2429/8560.

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The main objectives of this study were to examine mould thermal response and billet surface quality during continuous casting of steel billets with powder lubrication, and to compare with oil lubrication. Measurements were carried out on an operating billet caster to determine mould-wall temperature profiles for different mould-flux types, mould coolingwater velocity, oscillation frequency and steel grade. The trial involved data acquisition on mould displacement, casting speed, metal level and mould powder temperature field. In addition, mould powder consumption and liquid flux pool dep

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Chen, Ya-Ru, and 陳雅如. "The research on the relevance of quality management activity and organization performance--An empirical study on the precision die-casting firm." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/62570195164371566904.

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碩士<br>淡江大學<br>國際貿易學系國際企業學碩士班<br>93<br>To face with the current trend of globalization, enterprises try to improve their competitiveness, quality procedures, management structure by obtaining ISO9000 series certification. The die-casting manufacturers need to improve productivity quality to treat the severe surroundings. In order to understanding the relevance between the quality management activity and organization performance, the surveyed was adopted as methodology for this study to probe the specific die-casting manufacturer who has implemented ISO 900 series for many years. There were t

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