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Collection's Items (Sorted by Submit Date in Descending order): 1 to 15 of 15
Kučerová, Ludmila , Hájek, Jiří , Vítek, Jan
The Effect of Cryogenic Treatment on Mechanical Properties, Wear and Corrosion Resistance of Aluminium Alloy AW7075

Effect of addition of cryogenic treatment to a standard heat treatment of aluminium alloy AW 7075 was tested in this work. Used heat treatment consisted of solution annealing at 470 °C for two hours and precipitation aging treatment at 130°C for 14 hours, 120 °C for ...

Khalaj, Omid , Saebnoori, Ehsan , Chocholatý, Ondřej , Jirková, Hana , Svoboda, Jiří
High Temperature and Corrosion Properties of A Newly Developed Fe-Al-O Based OPH Alloy

Bricín, David , Elmanová, Andrea , Kříž, Antonín
The effect of selective laser melting technology on the development of the structure of samples made from WC-Co powder

The aim of this study was to analyse how changing the processing parameters of WC-Co powder affects its properties. The powder mixture properties were evaluated by technological tests firstly and then the results were than compared with properties of SD251 stainless steel powder wh...

Hájek, Jiří , Rot, David , Jiřinec, Jakub
Distortion in induction-hardened cylindrical part

This article concerns distortion of a workpiece after induction-hardening under various conditions. It focuses particularly on the effects of quenching water temperature, PAG polymer concentration and the rotation speed of the workpiece during induction hardening. Electrical as well as non-electrical&...

Kříž, Antonín , Průcha, Vojtěch
Condition of carbides in high-speed steels after multidirectional forging

Although heat treatment of high-speed steels has been covered in numerous treatises, their microstructure before treatment still receives insufficient attention. This article therefore explores the relationship between the initial microstructure and resultant properties in heat treated steels for cutting&#...

Bricín, David , Kříž, Antonín
Processability of WC-Co powder mixtures using SLM additive technology

This contribution presents the findings from an experimental study which explored the possibility of processing WC-Co-based powders using selective laser melting (SLM) additive technology. Two commercially available WC-Co powder mixtures were studied. One is intended for thermally sprayed coatings and...

Beneš, Petr , Průcha, Vojtěch , Hájek, Jiří , Vítovec, Vilém
Possibility of Using Eddy Current Evaluation of the Heat Treatment of Steel

There are a large number of special methods for exploring the internal condition of materials on the basis of eddy currents. A major use of this method can be seen in surface engineering, particularly in studyiing some state quantities of surface integrity. It is also an&...

Benešová, Soňa , Kesl, Miloslav
Příprava kované rychlořezné oceli s vysokým stupněm prokování a ultrajemnou strukturou pro speciální nástroje

The paper describes the problem of high-speed steel forging. To achieve wear resistence and high reability of steel tools, a high degree of forging must be ensured. High-speed steel is one of the hard-to-formable materials with a narrow forging temperature interval. Exceeding the u...

Průcha, Vojtěch , Kříž, Antonín , Žďánský, Ondřej , Vnouček, Milan
Analysis of Fractured Weldment of Hadfield Steel

This contribution is divided into two sections. The first one deals with identifying the cause of fracture in a ring, which fractured after weld surfacing. Optical and scanning electron microscopy and hardness testing were employed. Chemical composition was determined using the GDOES an...

Průcha, Vojtěch , Bricín, David , Kříž, Antonín
Effect of Cryogenic Treatment on Properties of Cemented Carbides

The main goal of this paper is to present experiments exploring the effect of cryogenic treatment on the properties of cemented carbides. The experimental materials were chosen from three basic groups of cemented carbides with different binders and different WC grain sizes. One hal...

Vála, Lukáš , Medlín, Rostislav , Koštejn, Martin , Karatodorov, Stefan , Jandová, Věra , Vavruňková, Veronika , Křenek, Tomáš
Laser-Induced Reactive Deposition of Nanostructured CoS2- and Co2CuS4-Based Films with Fenton Catalytic Properties

Highly polymorphic cobalt sulfide represents attractive material because of its unique electronic, optical, magnetic, mechanical and catalytic properties. Pulsed laser irradiation of a solid CoS2 target results in ablation and deposition of thin films on Ta and Cu substrate, which were analy...

Zetek, Miroslav , Zetková, Ivana , Kučerová, Ludmila , Kepka, Miloslav , Šimeček, Jiří , Černý, Ivo , Kec, Jan
Obrobitelnost konvenčního Inconelu 718 vs. 3D tištěného metodou DMLS při vrtání

Machinability is a technological characteristic expressing the aggregate influence of the physical, mechanical and chemical properties of the machined material on the course and on the economic or respectively, qualitative results of the cutting process. It can be evaluated as a qualitative,...

Nozar, Martin , Zetková, Ivana , Hanzl, Pavel , Daňa, Milan
Aspekty výroby kovových součástí pomocí 3D tisku

In recent years, the 3D printing attracted an extraordinary interest thanks to its ability to create complex shapes and structures virtually unattainable using classical production processes. Additive technologies have succeeded in penetrating into a number of industry branches, which use them&#x...

Podaný, Pavel , Reardon, Christopher , Koukolíková, Martina , Procházka, Radek , Franc, Aleš
Microstructure, Mechanical Properties and Welding of Low Carbon, Medium Manganese TWIP/TRIP Steel

Manganese twinning induced plasticity (TWIP) steels are attractive materials for the automotive industry thanks to their combination of strength and excellent toughness. This article deals with basic microstructural and mechanical properties of sheet metal of two heats of low-carbon medium-manganese&#...

Beneš, Petr , Valášek, Michael
Input shaping control with reentry commands of prescribed duration

Collection's Items (Sorted by Submit Date in Descending order): 1 to 15 of 15