Explanipedia

Numerical Simulation and Optimization of Furnace Roll Casting Production Technology Open

Martina Bašistová, Filip Radkovský, Petr Lichý, Šimon Kielar, Iveta Vašková · 2025

This study investigates the use of steel and cast iron for producing cast furnace rolls to replace welded rolls, which often fail from cracks and limited durability. Casting had not been previously considered by the manufacturer, but risin…

Ti-Al-V/Zn-Al-Cu Composite Materials Prepared by Zinc Melt Infiltration Technology Open

Veronika Balejová, Alena Michalcová, Martina Bašistová, Petr Lichý, Dalibor Vojtěch · 2025

This work deals with the preparation and characterization of TiAlV/ZnAlCu composite materials. The aim is to create a model for biomaterial with good biocompatibility and acceptable mechanical properties. Infiltrating zinc into the reinfor…

Influence of the Molding Technique on the Bell Casting Geometry Open

D. Bartocha, A. Dulska, I. Licha, Petr Lichý, Maciej Kaźmierczak · 2025

The influence of the technique used to make the casting mold on the geometry and sound of the bell has been analyzed. The starting point was a CAD model of a bell with a geometry designed to obtain the required overtone frequencies that de…

Numerically and Experimentally Establishing Rheology Law for AISI 1045 Steel Based on Uniaxial Hot Compression Tests Open

Petr Lichý, Josef Walek · 2025

Design and optimization of a castability test for copper alloys applied to plaster moulds Open

Filip Radkovský, František Zlámal, I. Vasková, Martina Bašistová, Petr Lichý , et al. · 2024

The paper deals with the design and execution of the test of the castability into preheated plaster moulds. Castability is an important parameter for the evaluation of foundry alloys. When the metal does not run, it usually causes an irrep…

Variability in the Distinctive Features of Silica Sands in Central Europe Open

Martina Bašistová, Jiřina Vontorová, Simona Zlá, Monika Kawuloková, Petr Lichý , et al. · 2024

Quality quartz sand is globally utilized in construction due to its availability and economic factors, especially in the production of composite cements. Despite its positive properties, quartz sand also has several disadvantages. The dila…

Evaluation of Mixing Efficiency and How it Affects the Properties of the New Green Sand Mixtures Open

Šimon Kielar, Martina Bašistová, Petr Lichý · 2023

The current trend in the preparation of green sand mixtures emphasizes the acceleration of the mixing process while maintaining the quality of the mixture. This requirement results in the necessity of determining the optimal conditions for…

Dilatation of New Progressive Hybrid Sand and Its Effect on Surface Structure, Roughness, and Veining Creation within Grey Cast Iron Open

Martina Bašistová, Filip Radkovský, Ivana Kroupová, Petr Lichý · 2023

The constant effort of all metal alloy manufacturing technologies and processes is to improve the resulting quality of the processed part. Not only the metallographic structure of the material is monitored, but also the final quality of th…

Effect of chemical composition of silica sand on thermal dilatation Open

Martina Bašistová, Petr Lichý, Miroslav Dostál · 2023

One of the factors influencing the surface quality of castings is the resulting thermal expansion when silica sands are used.This is characterised both by its high value compared to other non-silica sands, and by its typical discontinuous …

The Influence of Silica Sand Granulometry and Sorting Level on Thermal Expansion Open

Martina Bašistová, Petr Lichý · 2022

The quality of the castings depends, among other influences, on the quality of the moulding mixture used. The silica sands used are \ncharacterized by high thermal expansion compared to other sands. The tendency to dilatation of the mould…

Determination of linear expansion of AlSi10Mg aluminium alloy depending on external conditions during solidification Open

Filip Radkovský, Martina Gawronová, N. Válková, Petr Lichý, Ivana Kroupová , et al. · 2022

The article deals with the possibility of influencing the properties of aluminium alloy castings by changing the external conditions during solidification. Due to the high demands of customers, influencing the resulting microstructure is a…

Evaluation of additive manufacturing of sand cores in terms of the resulting surface roughness Open

Martina Gawronová, Petr Lichý, Ivana Kroupová, Tomáš Obzina, Jaroslav Beňo , et al. · 2022

Effect of the Composition of Hybrid Sands on the Change in Thermal Expansion Open

Filip Radkovský, Martina Gawronová, V. Merta, Petr Lichý, Ivana Kroupová , et al. · 2022

In the foundry industry, silica sands are the most commonly used type of sands for the production of sand foundry moulds using various types of binders. Their greatest disadvantage is their significant volume changes at elevated temperatur…

Technology of Production of Mold Filling Material for Specific Purposes in the Field of Metallic Foam Casting Open

Ivana Kroupová, Martina Bašistová, Petr Lichý, V. Merta, Filip Radkovský , et al. · 2022

This paper describes the technology for the production of precursors (space holder material) used to form the complex internal \nstructure of cast metal foam. The precursor material must exhibit sufficient refractoriness, resist contact w…

Use of Molding Mixtures for the Production of Cast Porous Metals Open

Ivana Kroupová, Martina Gawronová, Petr Lichý, V. Merta, Filip Radkovský · 2022

This paper aims to present the possibility of producing cast porous metals (or metallic foams) in a low-tech way by the use of conventional foundry technologies, i.e., the common procedures and materials. Due to the technological and econo…

Mulling and its Effect on the Properties of Sand-Water-Bentonite Moulding Mixture Open

Martina Gawronová, Šimon Kielar, Petr Lichý · 2022

Today, foundries are facing increasing demands for greener and more economical production while maintaining or improving the quality of the castings produced.The importance and use of green sand mixtures using bentonite as a binder are thu…

Evaluation of Collapsibility of Selected Core Systems Open

Tomáš Obzina, V. Merta, Jiří Rygel, Petr Lichý, Klára Drobíková · 2022

There are mainly two different ways of producing sand cores in the industry. The most used is the shooting moulding process. A mixture of sand and binder is injected by compressed air into a cavity (core), where it is then thermally or che…

Evaluation of Additive Manufacturing of Sand Cores in Terms of the Resulting Surface Roughness Open

Martina Gawronová, Petr Lichý, Ivana Kroupová, Tomáš Obzina, Jaroslav Beňo , et al. · 2022

MICROSTRUCTURE AND PROPERTIES OF BIOCOMPATIBLE Mg-Ca-Zn-Mn ALLOY Open

Michal KOPELENT, Monika Losertová, Vojtěch Havlas, Kateřina Konečná, Petr Lichý , et al. · 2022

Nowadays, implants are predominantly made of metallic materials that have two main problems.The first resides in the modulus of elasticity being higher than the one of the human bone (10-20 GPa), resulting in stress shielding and subsequen…

Preparation of Cast Metallic Foams with Irregular and Regular Inner Structure Open

Ivana Kroupová, Martina Gawronová, Petr Lichý, V. Merta, Filip Radkovský , et al. · 2021

The aim of this paper is to summarize the possibilities of foundry methods for the production of metallic foams. At present, there are a number of production technologies for this interesting material, to which increasing attention has bee…

Technological and Quality Aspects of the Use of Innovative Inorganic Binders in the Production of Castings Open

Tomáš Obzina, V. Merta, Martin Folta, Josef Bradáč, Jaroslav Beňo , et al. · 2021

The production of cores for the pre-casting of holes in castings places high demands on the quality of the molding mixtures used. For this reason, organic binders are still used to a large extent, which, although they meet the technologica…

Innovative Inorganic Binder Systems for the Production of Cores for Non-Ferrous Metal Alloys Reflecting the Product Quality Requirements Open

V. Merta, Jaroslav Beňo, Tomáš Obzina, Filip Radkovský, Ivana Kroupová , et al. · 2021

The aim of this study is the evaluation of the parameters of core mixtures using different binder systems with regard to the collapsibility of cores after casting and the resulting product quality of castings reflecting surface requirement…

Application of digital microscope for prediction of surface quality of castings Open

Tomáš Obzina, Jaroslav Beňo, V. Merta, Petr Lichý, Klára Drobíková · 2021

The aim of this work is to determine the possibility of using a digital microscope as a non-contact measurement for the surface quality of cores, and thus to predict the surface quality of pre-casted holes and cavities in manufactured cast…

Some Possibilities of Using Statistical Methods While Solving Poor Quality Production Open

R. Lakomá, Libor Čamek, Petr Lichý, Ivana Kroupová, Filip Radkovský , et al. · 2020

This paper presents an overview of a research on six practical cases that were solved in a precise casting company where parts are cast by the mean of the low-wax casting method (investment casting) in order to decrease poor quality produc…

Refining aluminium-alloy melts with graphite rotors Open

Petr Lichý, Martina Bajerová, Ivana Kroupová, Tomáš Obzina · 2020

The presented paper is focused on the study of refining aluminium-alloy melts. The quality of castings is determined by the basic material, i.e., the input material (furnace charge), its subsequent melting and subsequent metallurgical modi…

Use of water-soluble precursors in the production of cast metal foams Open

Ivana Kroupová, Petr Lichý, I. G. Dalla Lana · 2020

The paper is devoted to the field of manufacturing cast metallic foams - porous metal materials - with a stochastic arrangement of the inner cavities. The mastering of inexpensive ways of manufacturing metallic foams is a prerequisite for …

Use of precursors for the production of cast metallic foams Open

Ivana Kroupová, Petr Lichý, V. Merta, I. G. Dalla Lana · 2019

The presented work was devoted to the development of the production processes for metallic foams, which were based on \nconventional casting technologies. The use of the standard casting processes and standard materials made it possible to…

STUDY OF THE INFLUENCE OF EXPERIMENTAL CONDITIONS ON THE TEMPERATURES OF PHASE TRANSFORMATIONS IN HIGH-TEMPERATURE AREA FOR FeCCr AND FeCNi BASED SYSTEMS Open

Ľubomíra DROZDOVÁ, Bedřich Smetana, Mário Machů, Hana Francová, Simona Zlá , et al. · 2019

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Evaluation of Properties of Cast Metal Foams with Irregular Inner Structure Open

Ivana Kroupová, Petr Lichý, Lačezar Ličev, Jiří Hendrych, Kamil Souček · 2018

Internal structure of metal foams is one of the most important factors that determine its mechanical properties. There exists a number of methods for studying the nature of the inner porous structure. Unfortunately most of these processes …

Preparation and Evaluation of Properties of Cast Metallic Foams with Regular Inner Structure Open

Petr Lichý, T. Elbel, Ivana Kroupová, Filip Radkovský · 2017

Lately we encounter still more new applications of metallic foams, as well as possible methods of their manufacture. These metallic materials have specific properties, such as large rigidity at low density, in some cases high thermal condu…

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