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Coating methods for cutting tools
Doležal, Jan ; Madaj, Martin (referee) ; Humár, Anton (advisor)
Bachelor work describes methods of coating of cutting tools and their technical characteristics. The work is given below the current product range of manufacturers of coated cemented carbides. At the end of this work is treated the development of coating cutting tools and types of applied coatings.
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Coating methods for cutting tools
Bittner, Jan ; Sedlák, Josef (referee) ; Humár, Anton (advisor)
The present bachelor study prescribes process of coating deposition, namely PVD a CVD technology. In the review, new turning grades of market leading hardmetal cutting tools producers are listed. Further or, some of new developments in field of coating technology are mentioned
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Cutting tool preparation before coating
Musil, Michal ; Novák, Zdeněk (referee) ; Humár, Anton (advisor)
This bachelor thesis summarizes importance and advantages of surface preparation before coating process. Next part of this work analyzes an influ-ence of surface preparation before coating process on tool geometry, tool life and cutting performance. Experimental part brings a comparison between mi-cro-finishing by mix of SiC particles and walnut shells and ion cleaning tech-nology that by the help of Ti or Ar ionts. The 6 mm twist drill made from high speed steel has been chosen as the sample for experimental works. There are describe the advantages of preparation of tool cutting edges before coating, especially the micro-finishing and ion cleaning, and their positive effects on geometry and performance of tool at the end of the work.
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Coated cemented carbides
Foltýn, Michal ; Sedlák, Josef (referee) ; Humár, Anton (advisor)
This bachelor’s thesis is focused on coated cemented carbides, methods for coatings and properties of coatings. In the first part of this thesis there is mentioned basic subdivision of tool’s materials, including description of properties and possibilities of their use. Another part of this thesis is focused on the coating deposition methods. As each method there is noticed the description, advantages and disadvantages. In next part there are described processes which precede own deposition process and their influence on properties of coatings. In this thesis are also described properties of coatings and methods for their testing. The last part of thesis is focused on the offer of certain producers of coated cemented carbides. Several materials are chosen from each producer and there are mentioned descriptions of their properties, structure of coatings and possibilities of using.
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Construction Technology implementation stage of floors in the gymnasium building
Hánová, Kristýna ; Novotný, Michal (referee) ; Diaz, Yvetta (advisor)
This bachelor thesis deals with construction - technologic phase of floors implementation in the building of the Austrian gymnasium, which is located in Prague. The main part of this thesis is technological regulation for wear layers and floor carrier layer of anhydrite. Furthermore, the thesis addresses the situation of wider relations, principles of construction organization, proposal of construction assembly, control and testing plan, safety and health protection during the work, and the budget of items with timeline.
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Adhesion of bituminous binders to aggregate
Vlk, Petr ; Hýzl, Petr (referee) ; Varaus, Michal (advisor)
In 2005 the revised European standard 12697-11:2005 [1] was introduced offering a choice of three different methods. The static method described in part B has some similarities with the replaced Swiss standard for the determination of the affinity between bitumen and aggregates [2] and Czech standard for adhesions of asfalt binder to aggregates ČSN 73 6161 [3]. The result of this study is to compare the static method described in the [3] and a draft changes by Swiss research project [4] with the current revision of the European Standard 12697-11: 2005.
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Microroughness of the superpolished coated sample
Melich, Radek ; Kovačičinová, Jana ; Lédl, Vít ; Matoušek, Ondřej ; Pintr, Pavel ; Pleštil, Jan ; Polák, Jaroslav ; Possolt, Martin ; Procháska, František ; Psota, Pavel ; Rail, Zdeněk ; Tomka, David ; Vít, Tomáš
This document describes a test of microroughness change after coating of the representative sample of the METIS mirror surface with respect to microroughness.
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Effect of coating on fracture behaviour of ceramic foams under tensile loading
Řehořek, Lukáš ; Dlouhý, Ivo ; Chlup, Zdeněk
Cellular structures are promising type of architecture for a lot of materials whether made of metals, plastic or ceramic. Target applications are those where lightweight, damping and and/or stiff properties are required. With combination of different kinds of materials the foamed composites with favourable mechanical properties can be developed. In case of ceramic foams the main disadvantage – brittleness – can be reduced. For straight forward application of this materials all types of mechanical properties have to be known. The tensile properties of open cell ceramic foam material based on alumina coated by various materials are presented in this paper.
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