Перегляд Ústav strojírenské technologie за датою

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  • VÝŠKOVÉ PARAMETRY TEXTURY POVRCHU 

    Jankových, Róbert; Bumbálek, Bohumil (MM publishing, s.r.o., 2014-11-13)
    V normě ČSN EN ISO 25178-2 je definováno celkem 7 výškových parametrů textury povrchu. Jejich české názvy byly vytvořeny překladem z evropské normy EN ISO 25178-2:2012. V první části článku jsou uvedeny navržené změny v ...

  • Study of materials produced by powder metallurgy using classical and modern additive laser technology 

    Sedlák, Josef; Říčan, Daniel; Píška, Miroslav; Rozkošný, Luboš (Elsevier, 2015-02-24)
    The paper focuses on an analysis of materials produced by modern classic additive method direct metal laser sintering (i.e. powder metallurgy). Direct metal laser sintering belongs to file of additive technologies of rapid ...

  • Surface Parameters, Tribological Tests and Cutting Performance of Surface Parameters, Tribological Tests and Cutting Performance of Coated HSS Taps 

    Píška, Miroslav; Sliwková, Petra (Elsevier, 2015-02-24)
    The paper deals with a study of 2D surface parameters, Coulombs coefficient of friction and cutting/forming performance of selected PVD coated HSS taps when machining of carbon steel C45 and forming of hardened steel ...

  • Production of Prototype Parts Using Direct Metal Laser Sintering Technology 

    Sedlák, Josef; Zemčík, Oskar; Slaný, Martin; Chladil, Josef; Kouřil, Karel; Sekerka, Vít; Rozkošný, Luboš (ČVUT, 2015-09-01)
    Unconventional methods of modern materials preparation include additive technologies which involve the sintering of powders of different chemical composition, granularity, physical, chemical and other utility properties. ...

  • Changes in the surface layer of rolled bearing steel 

    Zemčík, Oskar; Sedlák, Josef; Chladil, Josef (ČVUT, 2015-10-31)
    This paper describes changes observed in bearing steel due to roller burnishing. Hydrostatic roller burnishing was selected as the most suitable method for performing roller burnishing on hardened bearing steel. The ...

  • Experiments with Forming Coated Sheets with Plasma-Chemical Pretreatment of the Surface 

    Schwarzer, Emil; Dvořák, Milan (Scientific Research Publishing Limited, 2016-06-30)
    The article used new experimental equipment for effective testing of adhesion coatings on the sheets. Testing was performed in jig by bending roller with selected radius. In the context of experiments a multi-jet system ...

  • Fatigue Life of 7475-T7351 Aluminum After Local Severe Plastic Deformation Caused by Machining 

    Ohnišťová, Petra; Píška, Miroslav; Petrenec, Martin; Dluhoš, Jiří; Horníková, Jana; Šandera, Pavel (MPDI, 2019-11-03)
    The fatigue properties of thermo-mechanically treated and machined aluminum alloy 7475-T7351 have been studied. The applied advanced machining strategy induced intensive plastic deformation on the machined surface under ...

  • The Influence of WEDM Parameters Setup on the Occurrence of Defects when Machining Hardox 400 Steel 

    Mouralová, Kateřina; Prokeš, Tomáš; Beneš, Libor; Bednář, Josef (MDPI, 2019-11-09)
    The unconventional WEDM technology is a highly used technology for producing precise and indented shaped parts of all at least electrically conductive materials. This wide use makes this technology applicable in almost all ...

  • Assessment of Retained Austenite in Fine Grained Inductive Heat Treated Spring Steel 

    Olina, Anna; Píška, Miroslav; Petrenec, Martin; Hervoches, Charles; Beran, Přemysl; Pechoušek, Jiří; Král, Petr (MDPI, 2019-12-05)
    Advanced thermomechanical hot rolling is becoming a widely used technology for the production of fine-grained spring steel. Different rapid phase transformations during the inductive heat treatment of such steel causes the ...

  • Verification of Fuzzy Inference System for Cutting Speed while WEDM for the Abrasion-Resistant Steel Creusabro by Conventional Statistical Methods 

    Mouralová, Kateřina; Hrabec, Pavel; Beneš, Libor; Otoupalík, Jan; Bednář, Josef; Prokeš, Tomáš; Matoušek, Radomil (MDPI, 2020-01-04)
    Wire electrical discharge machining is an unconventional machining method for the production of complex-shaped and very precise parts. Because of the high energy consumption of this machining process, it is necessary to ...

  • Analysis of the machinability of copper alloy Ampcoloy by WEDM 

    Mouralová, Kateřina; Beneš, Libor; Prokeš, Tomáš; Bednář, Josef; Zahradníček, Radim; Jankových, Róbert; Fries, Jiří; Vontor, Jakub (MDPI, 2020-02-11)
    The unconventional technology wire electrical discharge machining is widely used in all areas of industry. For this reason, there is always an effort for efficient machining at the lowest possible cost. For this purpose, ...

  • Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM 

    Mouralová, Kateřina; Beneš, Libor; Bednář, Josef; Zahradníček, Radim; Prokeš, Tomáš; Fries, Jiří (MDPI, 2020-04-19)
    Die-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal and external shapes and cavities. For this reason, the effect of machine ...

  • Study of micro structural material changes after WEDM based on TEM lamella analysis 

    Mouralová, Kateřina; Zahradníček, Radim; Beneš, Libor; Prokeš, Tomáš; Hrdý, Radim; Fries, Jiří (MDPI, 2020-06-07)
    Wire electrical discharge machining is an unconventional machining technology that is crucial in many industries. The surface quality of the machined parts is carefully monitored, but the condition of the subsurface layer ...

  • Precision Machining of Nimonic C 263 Super AlloyUsing WEDM 

    Mouralová, Kateřina; Beneš, Libor; Bednář, Josef; Zahradníček, Radim; Prokeš, Tomáš; Fiala, Zdeněk; Fries, Jiří (MDPI, 2020-06-24)
    Wire electrical discharge machining (WEDM) is an unconventional and very efficient technology for precision machining of the Nimonic C 263 super alloy, which is very widespread, especially in the energy, aerospace and ...

  • The Effect of Simultaneous Si and Ti/Mo Alloying on High-Temperature Strength of Fe3Al-Based Iron Aluminides 

    vodickova, vera; Švec, Martin; Hanus, Pavel; Novák, Pavel; Záděra, Antonín; Keller, Vojtěch; Prokopčáková, Petra (MDPI, 2020-08-03)
    The effect of phase composition and morphology on high-temperature strength in the compression of Fe-Al-Si-based iron aluminides manufactured by casting was investigated. The structure and high-temperature strength in the ...

  • The Origins of High-Entropy Alloy Contamination Induced by Mechanical Alloying and Sintering 

    Moravčík, Igor; Kubíček, Antonín; Moravčíková de Almeida Gouva, Larissa; Adam, Ondřej; Kaňa, Václav; Pouchlý, Václav; Záděra, Antonín; Dlouhý, Ivo (MDPI, 2020-09-03)
    One of the prevailing problems for materials produced by powder metallurgy is contamination from various sources. This work deals with the influence of process parameters and presence of process control agents (PCA) on the ...

  • Influence of heat treatment and nickel content on the properties of GX4CrNi13-4 steel 

    Kaňa, Václav; Krutiš, Vladimír; Bořil, Petr; Záděra, Antonín; Rimko, Marcel (Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 2020-10-19)
    For the EN GX4CrNi13-4 martensitic stainless steel, research was conducted to investigate the impact of the quenching intensity and the content of nickel on the mechanical properties and amount of retained austenite. It ...

  • WEDM used for machining high entropy alloys 

    Mouralová, Kateřina; Beneš, Libor; Zahradníček, Radim; Bednář, Josef; Záděra, Antonín; Fries, Jiří; Kaňa, Václav (MDPI, 2020-10-25)
    Unconventional wire electrical discharge machining technology (WEDM) is a key machining process, especially for machining newly emerging materials, as there are almost no restrictions (only at least minimal electrical ...

  • Hardened Steels and Their Machining 

    Osička, Karel; Chladil, Josef (MDPI, 2021-02-12)
    This article discusses the issue of hardened steel machining. Many components in theengineering industry use hardening as the final heat treatment. These components usually occupya significant position in a given assembly ...

  • Effect of Higher Silicon Content and Heat Treatment on Structure Evolution and High-Temperature Behaviour of Fe-28Al-15Si-2Mo Alloy 

    Švec, Martin; Vodičková, Věra; Hanus, Pavel; Pazourková Prokopčáková, Petra; Čamek, Libor; Moravec, Jaromír (MDPI, 2021-06-01)
    This paper describes the structure and properties of cast Fe3Al-based alloy doped with 15 at. % of silicon and 2 at. % of molybdenum. The higher content of silicon is useful for the enhancement of high-temperature mechanical ...