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Monolithic milling tools with PVD coatings and their use
Ševčík, Jan ; Sliwková, Petra (referee) ; Jaroš, Aleš (advisor)
The bachelor thesis deals with the monolithic milling tools carbide on the surface which is deposited by a thin layer of rating on. First of all, the thesis describes the method of milling, the basic division of milling operations and milling tools, power analysis tool load. Then, it is analyzed problems of cemented carbides, its production, properties and dividing into groups. After that it is described characteristic of coating methods, especially the PVD method, and its modifications. The last part is devoted to producer’s offers of coated monolithic mills. There are introduced few selected tools and described its characteristics, geometry and application suitability.
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High-Speed Steel Mills with PVD coatings and their Use
Žilák, Marek ; Fiala, Zdeněk (referee) ; Jaroš, Aleš (advisor)
This bachelor thesis "Mills from high-speed steel with PVD coatings and their use" deals with tool materials and their distribution (mainly high-speed steel). The problem of high-speed steels is analyzed (their distribution, properties and uses, chemical composition and finally heat treatment). Then the characteristics of the coating methods (mainly PVD) is analyzed. The conclusion of this work is focused on the types of spray coating and the responsibility of the high speed steel mills and their use in current practice.
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Environmental Impact Assessment of Manufacturing Abrasion Resistant Coatings with Magnetron Sputtering
Krobauer, Jakub ; Holub, Martin (referee) ; Kocmanová, Alena (advisor)
This thesis is focused on the environmental impact assesment of the manufacturing process of cutting tool coatings. Described are current environmental problems and duties of companies affecting the environment. There is a description of methods used in environmental management, one of which is the LCA method. This method is then used to compare environmental impacts of TiN and AlTiN coatings. The thesis describes manufacturing process of these coatings and evaluates environmental impacts for both coatings. These results are then compared and conclusions and recommendations are made.
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New Milling HSS Cutters for Roughing Operations
Jaroš, Aleš ; Janáč, Alexander (referee) ; Chladil, Josef (referee) ; Píška, Miroslav (advisor)
Dissertation thesis is focused on development, design and production of the new milling cutter which is used for roughing operations. High-speed steels, coating technology and milling technology are described in first chapters of dissertation thesis. The main part of this thesis is the design of the new milling cutter that has been designed on the basis of the machining simulation. The milling cutter is designed as a three-flute cylindrical end mill made of high speed steel. The each flute is composed of two special compensation edges. The compensation edges are used for reducing (at best suppression) tensile stress in the heel of the tooth. The milling cutter was made by lost wax technology, followed by grinding and thermal treatment. New designed tools were deposited by PVD coatings (e.g. (Al,Ti)N). Standard catalog milling cutters (producer ZPS - milling tools, Zlín, Czech Republic) were used for comparison the designed milling cutter. Carbon steel CSN 41 2050 (DIN 1.1191) was used for milling, which was carried out with using process liquid. The monitored parameters were force loading, flank wear and tensile stress during milling. The dynamometer Kistler was used for measuring force loading and data obtained during machining was used for stress analysis.
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Environmental Impact Assessment of Manufacturing Abrasion Resistant Coatings with Magnetron Sputtering
Krobauer, Jakub ; Holub, Martin (referee) ; Kocmanová, Alena (advisor)
This thesis is focused on the environmental impact assesment of the manufacturing process of cutting tool coatings. Described are current environmental problems and duties of companies affecting the environment. There is a description of methods used in environmental management, one of which is the LCA method. This method is then used to compare environmental impacts of TiN and AlTiN coatings. The thesis describes manufacturing process of these coatings and evaluates environmental impacts for both coatings. These results are then compared and conclusions and recommendations are made.
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Thin nitride layers as permeation barriers
Veverka, Jakub ; Matějíček, Jiří ; Lukáč, František ; Pospíšil, D. ; Cvrček, L. ; Nemanič, V.
Permeation barriers represent one of the crucial fields in materials development for thermonuclear fusion. Primary objective of the barriers is to suppress the permeation of hydrogen isotopes (mainly tritium) from future thermonuclear fusion facilities. Secondary objective is to reduce their retention in structural materials. Expected reactor conditions put high demands on the material, as well as on the final barrier quality. Key properties are tritium permeation reduction, absence of defects (especially cracks), high-temperature stability and corrossion resistance, and compatibility with structural materials (mostly ferritic-martensitic steels). Thin nitride layers, identified as promising permeation barriers, were prepared by diffusion-based nitridation and physical vapour deposition (PVD), and characterized.
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Alternative Methods of Permeation Barriers Preparation
Veverka, Jakub ; Matějíček, Jiří
Permeation barriers represent one of the crucial fields in materials development for thermonuclear fusion. Primary objective of the barriers is to suppress the permeation of hydrogen isotopes (mainly tritium) from future thermonuclear fusion facilities. Secondary objective is to reduce their retention in structural materials. Expected reactor conditions put high demands on the material, as well as on the final barrier quality. Key properties are tritium permeation reduction, absence of defects (especially cracks), high-temperature stability and corrossion resistance, and compatibility with structural materials (mostly ferritic-martensitic steels). Thin nitride layers, identified as promising permeation barriers, were prepared by diffusion-based nitridation and physical vapour deposition (PVD), and characterized.
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ADHESION OF BIOCOMPATIBLE TiNb COATING
Kolegar, T. ; Matoušek, M. ; Vilémová, Monika ; Starý, V.
Preparation of a coating with a high quality requires good adhesion of the film to the substrate. The paper deals with the adhesion of biocompatible TiNb coating with different base materials. Several materials such as titanium CP grade 2, titanium alloys Ti6Al4V and stainless steel AISI 316L were measured. Testing samples were made in the shape of small discs. Those samples were coated with a TiNb layer by using the PVD method (magnetron sputtering). Onto the measured layer of TiNb an assistant cylinder was stuck using a high strength epoxy adhesive E1100S. The sample with the assistant cylinder was fixed into a special fixture and the whole assembly underwent pull-off testing for adhesion. The main result of this experiment was determining the strength needed to peel the layer and morphology and size of the breakaway. As a result, we will be able to determine the best base material and conditions where the coating will be remain intact with the base material.
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Monolithic milling tools with PVD coatings and their use
Ševčík, Jan ; Sliwková, Petra (referee) ; Jaroš, Aleš (advisor)
The bachelor thesis deals with the monolithic milling tools carbide on the surface which is deposited by a thin layer of rating on. First of all, the thesis describes the method of milling, the basic division of milling operations and milling tools, power analysis tool load. Then, it is analyzed problems of cemented carbides, its production, properties and dividing into groups. After that it is described characteristic of coating methods, especially the PVD method, and its modifications. The last part is devoted to producer’s offers of coated monolithic mills. There are introduced few selected tools and described its characteristics, geometry and application suitability.
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New Milling HSS Cutters for Roughing Operations
Jaroš, Aleš ; Janáč, Alexander (referee) ; Chladil, Josef (referee) ; Píška, Miroslav (advisor)
Dissertation thesis is focused on development, design and production of the new milling cutter which is used for roughing operations. High-speed steels, coating technology and milling technology are described in first chapters of dissertation thesis. The main part of this thesis is the design of the new milling cutter that has been designed on the basis of the machining simulation. The milling cutter is designed as a three-flute cylindrical end mill made of high speed steel. The each flute is composed of two special compensation edges. The compensation edges are used for reducing (at best suppression) tensile stress in the heel of the tooth. The milling cutter was made by lost wax technology, followed by grinding and thermal treatment. New designed tools were deposited by PVD coatings (e.g. (Al,Ti)N). Standard catalog milling cutters (producer ZPS - milling tools, Zlín, Czech Republic) were used for comparison the designed milling cutter. Carbon steel CSN 41 2050 (DIN 1.1191) was used for milling, which was carried out with using process liquid. The monitored parameters were force loading, flank wear and tensile stress during milling. The dynamometer Kistler was used for measuring force loading and data obtained during machining was used for stress analysis.
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