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Interaction between liquid metal and foundry mixture
Tomek, Ladislav ; Muselík, Pavel (referee) ; Rusín, Karel (advisor)
Subject of the diploma thesis was to resolve influence of grey cast iron on penetration into cement sand. Methodology of trial was designed and its attestation was implemented in experimental and running conditions. On boundary-line cement sand and pouring metal was certified generation of complex allied substances. Created mathematical model of mechanical penetration proved influence of temperature and chemical composition of grey cast iron on range of penetration.
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Cast Iron producing in foundry Slévárna a modelárna Nové Ransko and their charakteristics
Matulová, Anna ; Lána, Ivo (referee) ; Věchet, Stanislav (advisor)
This bachelor thesis deals with cast iron producing in foundry Slévárna a modelárna Nové Ransko and their characteristics in the form of literary research. In the first part graphite cast iron and its distribution is characterized. Furthermore, grey cast iron and ductile cast iron are described in detail in terms of mechanical properties, structure, chemical composition, production, heat treatment and use, and austempered ductile iron is specified. Then specific graphite cast iron, which foundry Slévárna a modelárna Nové Ransko used for production of castings, is listed and described. In conclusion, these materials are evaluated and their advantages and disadvantages are assessed.
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Making a replica of cannon barell
Helešic, Jan ; Ostratický, Marek (referee) ; Bořil, Petr (advisor)
The topic of the bachelor's thesis is the production of a cannon replica mainly on the basis of a suitably chosen technology. On the basis of a literary study, which consisted mainly of an examination of historical sources, gravitational casting was chosen. The mold was formed from the inorganic molding compound GEOPOL. The model of the barrel was created according to the historical model of the ship's cannon. The model was created by CNC machining and the material is artificial wood. Cast iron with flake graphite, which has suitable foundry properties, was chosen as the casting material. The conclusion of the thesis contains an evaluation of the selected technology.
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Effect of lead and antimony on the degradation of graphite shape in cast iron
Hlobil, Albert ; Kaňa, Václav (referee) ; Záděra, Antonín (advisor)
The bachelor thesis focuses on the effect of lead and antimony on the degradation of graphite in cast iron in relation to the lowered mechanical characteristics. This leads to the subsequent summary of the formation of degraded structures and unfavourable elements – the elements that are the cause of the formation. In the practical segment of the thesis, I will prove the effects of lead (or the combination of lead and antimony) on the degradation of graphite in cast iron with the focus lying at flake graphite. Furthermore, the thesis examines the mechanical characteristics and the attenuation of cast iron in relation to the formation of degraded graphite structures.
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Making a replica of cannon barell
Helešic, Jan ; Ostratický, Marek (referee) ; Bořil, Petr (advisor)
The topic of the bachelor's thesis is the production of a cannon replica mainly on the basis of a suitably chosen technology. On the basis of a literary study, which consisted mainly of an examination of historical sources, gravitational casting was chosen. The mold was formed from the inorganic molding compound GEOPOL. The model of the barrel was created according to the historical model of the ship's cannon. The model was created by CNC machining and the material is artificial wood. Cast iron with flake graphite, which has suitable foundry properties, was chosen as the casting material. The conclusion of the thesis contains an evaluation of the selected technology.
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Prediction of mechanical properties of lamelar iron castings by means of numerical simulation
Filipek, Szymon ; Hrouzek, Petr (referee) ; Roučka, Jaromír (advisor)
The aim of this thesis was to assess the degree of conformity between the mechanical properties evaluated by numerical simulation in software MAGMA5 and the measured values of hardness and ultimate tensile strength of lamellar graphite iron castings. The theoretical part of this thesis deals with the classification of cast iron, structural components of lamellar graphite iron, and the factors defining the resulting mechanical properties of the material. The practical part presents an attempt to find empirical dependencies between input parameters and results evaluated by simulation software. At the end, an analysis of the correlation between reality and simulation software is performed.
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Penetration of metal into green sand during pouring of iron castings
Ptáček, Tomáš ; Neudert, Alois (referee) ; Záděra, Antonín (advisor)
This diploma thesis deals with the creation of penetration of cast iron with graphite casting cast into bentonite molds. In the first part of the thesis is theoretically described the formation of penetration, its main causes, consequences and the elimination of this defect. The second part analyzes the causes of the defect with the Minitab statistical software and shows the possible connections of the input materials to the occurrence of the defect. Next, the experimental finding of the cause of the defect, which is focused on the measurement of the pressures in the form of the casting, is devoted to it.
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Surface melting and possible alloying of cast iron with lamellar graphite by electron beam
Abu Khait, Yosef ; Kouřil, Miloslav (referee) ; Pacal, Bohumil (advisor)
In this thesis, the structural and mechanical changes, which took place in flake graphite cast iron after electron beam surface melting and chrome-nickel surface alloying, were studied. Furthermore, the effect of set parameters on properties and depth of the melted and alloyed region is also analyzed. In the experimental part, the analyzed microstructures, micro-hardness and the distribution of elements after melting and alloying, were presented. Structural differences of material regions caused by melting were described based on microstructures. In the end of diploma thesis, the conclusions of using EB technology for surface melting and alloying were discussed.
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Quality control of the iron castings in the foundry
Krvač, Matěj ; Kaňa, Václav (referee) ; Záděra, Antonín (advisor)
This bachelor thesis deals with the properties of castings with ductile iron and gray iron. The theoretical part was focused on knowledge related to chemical composition, mechanical properties and monitoring of internal defects. In the experimental part, the structure is evaluated in non-etched and etched state. It compares with the chemical component and the mechanical properties with the literature. X-ray frames are monitored for internal defects. In conclusion, the results of the experiments are summarized and measures are proposed to improve the casting quality.
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