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INTELLIGENT NANOSTRUCTURES – A LOT OF TALK ABOUT NOTHING? MYTHS AND FACTS


Smart nanomaterials are those whose structures and components exhibit peculiar and welldeveloped physical, chemical, and biological properties caused by their nanosized dimensions. It is nanotechnology that deals w...

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HIGH TEMPERATURE BEHAVIOR OF Fe-Cr-Al STEEL UNDER OXIDIZING CONDITIONS – A REVIEW


This work reviews the current state of research regarding high temperature oxidation resistance of Fe-Cr-Al steels, that belong to a family of AFA (Alumina Forming Alloys). The behavior of these steels in hot gases...

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HIGH-TEMPERATURE SULPHIDATION OF Fe-Cr-Al STEELS: THE PRESENT STATE OF THE ART AND FUTURE RESEARCH


This work reviews the current state of research regarding high temperature sulphidation resistance of Fe-Cr-Al steels that belong to a family of AFA (Alumina Forming Alloys). The behavior of these steels in hot gas...

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TREATMENT OF SELECTED FOUNDRY WASTE USING BIODEGRADABLE METHOD (PRELIMINARY RESEARCH)


This paper presents the applicability of Bio Activ PH biopreparation in the treatment of toxic substances (phenol, formaldehyde) in selected types of waste mouldings and core laboratory scale. This method has not been used for this type of waste s...

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THE ASSESSMENT OF CHANGES OF THE STRUCTURE OF DUCTILE CAST IRON DEPENDING ON THE TIME AND TEMPERATURE OF THE METALLURGIC PROCESS


The results of technological tests (chemical composition, solidification curves, microstructure) of ductile cast iron smelting in the Foundry Research Institute in an induction furnace. In the case of crystallization of spheroidal graphite no long...

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The application of bentonite in classical moulding sands


The article presents results of laboratory tests to develop a new generation of foundry hybrid bentonite. Hybrid bentonite is intended for use as binder for synthetic moulding sands and sandmixes. In the previous practice foundry bentonite was a p...

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High-temperature oxidation of cast steel in water vapour


The article presents the results of studies of the oxidation process conducted at 900°C for 12 hours in an atmosphere of water vapour on cast heat-resistant steel with a diversified structure (ferritic-austenitic, austenitic, and austenitic wi...

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Stress analysis in the surface layer of steel castings


Stress measurements were taken on three castings made on the laboratory scale by different technologies from ledeburite alloy steel; the obtained results were subjected to a detailed analysis. The first casting was made by a conventional technique...

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High temperature corrosion of low alloyed steel in air and salt mist atmospheres


The aim of this work has been to show the influence of air oxidation and salt mist corrosion on the behaviour of low alloyed steels 18K (K18), 16M (16Mo3), 15HM (13CrMo4-4) and finally 10CrMo9-10 (10H2M) employed in the Polish energy sector. The e...

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Thermophysical properties of Cu-C composites obtained by powder metallurgy


Studies of composite materials of the Cu-C type with additives of different forms of carbon (carbon nanopowder, carbon nanotubes and reduced graphene oxide) were performed by the powder metallurgy method. Based on the structural tests conducted by...

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High temperature corrosion of metallic materials in coal fired power plant boilers


The aim of this work was to perform high temperature tests in steam conditions at 700‒800°C for 3000 hours. In this work seven alloys were studied: Cr rich austenitic steels 309S, 310S, HR3C, and two solid-solution strengthened Ni based allo...

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