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Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 80
Zmeko, Jan
Dosahování vysokých pevnostních hodnot u nově navržené koncepce pružinové oceli

The bachelor thesis deals with the comparison of effect of cooper on steel spring 40SiCr for the purpose of finding optimal heat treatment for improvements in mechanical properties. In the introduction, descriptions are given of heat treatment steels and precipitation process. In the&#x...

Nováček, Petr
Možnosti využití CHTZ pro zvýšení životnosti řetězu jízdního kola

Bachelor thesis deals with different possibilities how to protect the surface of the main chain material against adverse influences of working environment. The aim of this work is to suggest and prove the right method of heat treatment which ensures increasing of bicycle chain ...

Rubešová, Kateřina
Zpracování středně uhlíkové nízkolegované oceli v semi-solid stavu

This bachelor thesis deals with the possibilities of processing medi-um-carbon low-alloy steel using a semi-solid processing. The aim of this work was to apply this kind of processing for the steel 30MnVS6, with a relatively narrow forming interval. During the first experimets, several&...

Mach, Josef
Korelace výsledků zkoušek únavy získaných na klasických a miniaturních vzorcích

The bachelor thesis contains an introduction to problems connected with fatigue damage of the material. It describes the character of fatigue damage and determinating of fatigue characteristics. The aim is to determine the correlation between the results of the fatigue tests performed o...

Virágová, Pavla
Hodnocení lokálních mechanických vlastností a mikrostrukturních změn zirkoniových slitin po vysokoteplotní oxidaci

The objective of this bachelor work is nanoindetation analysis Zr-based alloy. That alloy is being used as a fuel cladding tubes in nuclear power plants. Specimens Zircaloy-4W were exposed for various time in different temperatures at the laboratories of ÚJP Prague. Nanoindentation...

Janda, Tomáš
Vliv tepelného zpracování na mikrostrukturu a korozní vlastnosti ložiskových kuliček

This bachelor thesis deals with the influence of heat treatment of bearing balls made of AISI 440C stainless steel on its microstructure and corrosion characteristics. The theoretical part describes the bearing and corrosion resistant steels, which focuses on martensitic stainless steels and...

Melzer, Marek
Aplikace a porovnání kontaktního a bezkontaktního měření deformace

This thesis deals with the problem of measuring the deformation of the test specimen. Deformation of the specimen was measured by a combination of contact and contactless measurement methods. Using the measured data the results of deflection were evaulated for both methods. Then th...

Papež, Petr
Elektrochemické vlastnosti kompozitních tvrdochromových povrchových úprav

The work deals with the relationship between the corrosion properties and composition of the composite chromium surface layers. The review part describes theory of chromium plating and corrosion. In the experimental part the measurement of the corrosion properties of different types of ...

Hadari, Jakub
Faktory ovlivňující korozní odolnost lopatek parních turbín

The Bachelor's work deals with observation of origins of corrosion on steels determined for production of steam turbine vanes. The first part includes theory of clasification corrosion, its origins and the effecting mechanism. In the second part there is explained method of cyclic&#...

Vítek, Jan
Vypracování doporučení pro vývoj chemického složení u vysoce legované Mn oceli (hadfield)

Bachelor thesis is focused on elaboration of recommendations for development of chemical composition and complex analysis of submitted samples of Mn steel with focus on resistance to abrasive wear as a characteristic of this kind of steel.

Brázda, Michal
Svařování vysokopevné oceli laserem a elektronovým paprskem

The aim of this bachelor thesis is to compare welding methods with laser and with electron beam. It deals with basic description of these technolo-gies and their further use. The empirical part deals with metallography and mechanical tests conducted on selected samples. Next, it&#x...

Kotous, Jakub
Studium procesů zrychlené sferoidizace karbidů v oceli a jeho vliv na výsledné vlastnosti po zušlechtění

The main objective is to compare microstructures and properties of steel after two types of spheroidising treatment. In the introduction, descriptions are given of phase transformations and processes in steel. Effects of heat treatment on the microstructure and resulting mechanical properties...

Rybář, Stanislav
Lokální mechanické vlastnosti laserově modifikovaných žárových nástřiků

This bachelor thesis is focused to comparing local mechanical properties of laser modified spray coatings by nanoindentation methods. Spray coatings are prepared by HVOF. Tested samples are compared by hardness, indentation elastic modulus, coating thickness and microstructure.

Pomahač, Jan
Ekologie výroby a likvidace slinutých karbidů

This bachelor's thesis deals with reclamation of cemented carbides by chemical processes. Weight losses are measured for different types of cemented carbides dissolving in different types of dissolution media. Danger of used chemicals and created chemicals is evaluated.

Procházka, Aleš
Hodnocení postupných změn mechanických vlastností na povrchu únavových vzorků s růstem únavového namáhání

The goal is mapping of changes of mechanical properties on surface of samples for fatigue tests in dependence on increasing fatigue stress with using sensitive methods for analysis of mechanical properties and behaviour of surface layers namely nanoindentation and scratch indentation. The&#x...

Jansa, Zdeněk
Vliv kalící teploty nástrojových ocelí na odolnost proti otěru

The aim of the bachelor thesis is to determine the effect size quenching temperature tool steel DIN 19573 surface resistance to abrasion and to determine the optimum heat treatment using methods: Vickers hardness measurement methods, metallographic analysis (light microscopy), PIN-ON-DISC test.

Formanová, Ludmila
Výroba tvárné litiny v malé slévárně

Theoretical part in this work includes closer description and closer look on methods of producting ductile iron, practical advice related to heat treatment, the number of chemical elements to include, that is necessary to comply. Structures of cast iron. Practical part of this...

Čechal, Stanislav
Hodnocení změn v povrchových vrstvách materiálů a vybraných systémů s tenkými vrstvami po tepelném zatížení

This bachelor thesis deals with influence of thermal degradation with simoultaneous effect of atmospheric corrosion of thin film systems, created by cathodic arc plasma deposition. Goal of this thesis is to do thermal degradation then do analysis of samples and compare the results ...

Černý, Jan
Porovnání vybraných tenkovrstvých systémů s nitridovými vrstvami a duplexními vrstvami

The goal of this work is to study and compare selected surface finishes on selected substrates. The results of this surface treatment is given on the base of results from analytic methods, therefore the second goal is the evaluation of the properties and behaviour of the&...

Coufal, Vladislav
Vliv tepelného zpracování na terminálně balistické vlastnosti nízkolegované vysokopevné oceli

Bachelor thesis compares ballistic resistant sheets of low-alloy high-strength steel of the chemical composition after heat treatment and tempering at a certain temperature. Test results will have major benefits for vehicle repairs.

Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 80