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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 109
Vostřák, Marek , Hajšman, Jan , Hruška, Matěj , Keslová, Anna
Comparison of mechanical properties of laser cladded WC and (TIW)C1-X IN NI based alloy coatings

For wear demanding applications, the metal matrix composites (MMC) are often used due to their high wear resistance, and the tungsten carbide is often used as hard reinforcing particles. Nevertheless, there are still some limits of WC, mainly its deterioration due to heat load ...

Chval, Zdeněk , Ráž, Karel , Aguiar, Icaro Almeida
Topology Optimization of B-pillar with Respect to Mesh Type and Size

This paper deals with the influence of different mesh types and element sizes in topology optimization. Meshes from brick elements, tetrahedral elements and combination of both of them were compared in sizes 20, 10 and 7mm. B-Pillar, structural car component, is used here in o...

Jirková, Hana , Vrtáček, Jiří , Peković, Michal , Janda, Tomáš , Kučerová, Ludmila
Influence of chromium and niobium on the press-hardening process of multiphase low-alloy TRIP steels

Press-hardening is an intensively developing forming technology which is mainly used for the production of car body parts. Because it is a hot forming technology, small forming forces can be utilized and, due to the lower spring-back effect, more accurate products are achieved. In&...

Jirková, Hana , Opatová, Kateřina , Jeníček, Štěpán , Kučerová, Ludmila
Combination of press-hardening and isothermal holding in the treatment of high-strength steels

Today, high-strength parts for the automotive industry are mainly produced by the press-hardening technology. In order to reduce costs, savings in production and optimal materials are sought. One option involves the use of high strength steels of various chemical compositions. Two high ...

Opatová, Kateřina , Kučerová, Ludmila , Zetková, Ivana
Methodology for observation of maraging tool steel after 3D printing using FIB and STEM mode

The components of the maraging tool steel produced by 3D printing are further heat-treated after printing. It includes a stress relief annealing and precipitation hardening. During this process precipitates of Ni3Ti and Fe2Mo or Fe7Mo are formed, which significantly contribute to an inc...

Kučerová, Ludmila , Burdová, Karolína , Stehlík, Adam
Effect of soaking temperature on the microstructure and mechanical properties of heat-treated Al-Si-Nb TRIP steel

Two-step heat treatment with bainitic hold at 425 °C was applied to low alloyed high strength steel with partial substitution of silicon by aluminium. The steel was further micro-alloyed by niobium. Various soaking temperatures in the range of 750-1250 °C were used to analyse ...

Tittel, Jan , Kepka, Miloslav , Heller, Petr
Static and dynamic testing of a bogie

The aim of this research is static and dynamic testing of a functional bogie model by hydraulic cylinders and subsequent evaluation of measured values. The load is determined according to the requirements specified in ČSN EN 13749, Railway applications – Wheelsets and bogies – ...

Peković, Michal , Vrtáček, Jiří , Janda, Tomáš , Volkmannová, Julie
Induction hardening of steels with use of the device for incremental forming of round bars HDQT-R 30-12

Induction hardening is mainly used for treating parts in which high hardness, wear-resistance, and ductile core are required, such as spur gears, wind turbine rings, and bearings. Innovative induction hardening processes are also developed for complex automotive components, such as camshafts ...

Rubešová, Kateřina , Peković, Michal , Jirková, Hana , Bystrianský, Martin
Effects of Deformation on the Behaviour of Chromium Carbides in Tool Steel Studied by Use of Semi-Solid Forming

Induction hardening technology is mainly used for processing parts where high hardness, although conventional treatment of tool steels is ordinarily used in industrial practice, engineers continue to seek new procedures to rid tool steels of objectionable primary sharp-edged chromium carbides, wh...

Bublíková, Dagmar , Jirková, Hana , Jeníček, Štěpán , Vrtáček, Jiří
Influence of chemical composition and parameters of heat treatment on the mechanical properties and microstructure of TRIP steels

Good mechanical properties of steels, in which appropriate heat treatment can produce mixed hardening structures, make them candidates for a broad range of applications, namely in the automotive industry. TRIP steels (in which transformation-induced plasticity operates) with a carbon content of&#...

Janda, Tomáš , Burdová, Karolína , Peković, Michal , Stehlík, Adam
Influence of higher partitioning temperatures on mechanical properties of heat treated high-strength steel alloyed with 1.3 % chromium

This paper deals with the innovative Quenching and partitioning (QP) heat treatment of low-alloyed chromium steel, and is especially focused on the higher temperatures of partitioning as well as longer holding times and its influence on mechanical properties of the material. As part...

Vrtáček, Jiří , Jirková, Hana , Peković, Michal , Tříska, Ladislav
Rolling of ingots of third-generation high-strength steels into sheets

One of the essential branches of today’s engineering production involves production of sheet stock by rolling. The majority of steel sheet stock is used in the automotive industry. In recent decades, this sector has been striving to reduce vehicle emissions. One of available soluti...

Khalaj, Omid , Ghotbi Siabil, Seyed Mohammad Amin , Tafreshi, Seyed Naser Moghaddas , Kepka, Miloslav , Kavalír, Tomáš , Křížek, Michal , Jeníček, Štěpán
The experimental investigation of behaviour of expanded polystyrene (EPS)

Low-strength substrates and anthropogenic soils are always an issue in civil engineering. Based on the soil layer types, several methods could be used to improve the basic/foundation layer however it would be difficult to make sure if the specified requirements are achieved. Nowada...

Ráž, Karel , Chval, Zdeněk
Development of the solar roof tile with internal cooling

This paper deals with the development of the roof tile with the integrated solar panel. This panel is cooled down with respect to maximizing of the effectivity. Dimensions of the tile are according generally used roof tile. Plastic solar tile can replace the regular one. ...

Bricín, David , Ackermann, Michal , Jansa, Zdeněk , Kubátová, Dana , Kříž, Antonín , Špirit, Zbyněk , Štafka, Jiří
Development of the structure of cemented carbides during their processing by SLM and HIP

The study focuses on microstructural evolution in a WC-Co powder mixture during Selective Laser Melting (SLM) and hot isostatic pressing (HIP) processing. This powder mixture contained a 13 plus/minus 0.6 % weight fraction of Co binder and WC particles of mean size of 3.0 ...

Bricín, David , Votava, Filip , Kubátová, Dana , Kříž, Antonín
Influence of the quality of models made by additive technologies on the quality of castings cast by investment casting

The article deals with the use of additive technologies (AM) to produce a fusible model for a casting. AM technologies SLA, FDM, or PolyJet have been used to create models of castings of musical instrument keys from various polymeric materials. The roughness profiles of the&#x...

Vaněk, Václav , Gorschenek, Martin , Polák, Roman
Geometric Specification of Complex Spatially-Oriented and Compliant Components II

The article is directly linked to the article called “Geometric Specification of Complex Spatially—Oriented and Compliant Components I”. Manufacturers of complicated and flexible machine parts, particularly in the automotive industry, are finding themselves in almost insoluble problems when designing ...

Zoubek, Michal , Šimon, Michal
Logistics 4.0: Readiness and technology of internal logistics processes of companies and design of a maturity model for warehousing

We are at the beginning of the fourth industrial revolution, which is already fundamentally influencing how goods are produced and distributed. Also, the rapid progress of the digitizing wave is exacerbated by the increasing availability of automated machines. Autonomous machines are no ...

Zoubek, Michal , Šimon, Michal
Methodology for evaluating the readiness of internal logistics processes for Industry 4.0

The field of internal logistics is one of the critical areas of a company and has a great potential within the concept of Industry 4.0. The basic premise of smart production is to have a complete overview of all the logistics movements of products, i.e. from entry,&#...

Zoubek, Michal , Šimon, Michal
Industry 4.0: A case study of industrial company transformation into Smart Factory with an accent on internal logistics and production

The first part of the paper contains the description of Industry 4.0 concept. The different views on this concept and main principles are mentioned. One of these principles is named Smart Factory. The Smart Factory concept is briefly described afterwards. The second part of th...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 109