Open Access Conference Proceedings

Abstract: Laser technologies are among the unconventional methods of heat treatment and machining. Among the biggest advantages of laser quenching (hardening), it can be included high speed and process efficiency, a narrow thermally affected area and the possibility of processing complicated parts in shape that could not be workable with common conventional methods. [..] Read more

Abstract: The aim of this study was to examine the effects of surface treatment with high energy sources on the microstructure and properties of austenitic-ferritic stainless steel sintered in dissociated ammonia. The multi-phase sinters examined in the study were prepared from two types of water atomized steel powders: 304L and 434L. [..] Read more

Abstract: The aim of this work is to describe the influence of plasma nitride layers with different case depths which were created in the root of V-notches to notch toughness of 30CrMoV9 steel. The different case depths of nitride layers were achieved by three nitriding processes at temperatures 450 °C, 500 °C and 550 °C. [..] Read more

Abstract: Surface treatments of metals are important areas of mechanical engineering. Galvanizing, which is a zinc coating on the steel base material by electrolytic deposition, belongs among the wide range of methods. [..] Read more

Abstract: This article deals with experimental determination of cutting tool wear during machining of Ti6Al4V alloy. This alloy features worsened machining ability that has direct influence on wear intensity and durability of cutting tool during machining. [..] Read more

Abstract: The paper deals with the evaluation of sheets with surface coating on the basis of Zn/Mg/Al and their application possibilities in the automotive industry. Evaluation is carried out by determination adhesive joints strength acc. [..] Read more

Abstract: CoNiCrAlY bond coats manufactured by the high-velocity oxygen-fuel spraying (HVOF) and cold gas dynamic spraying (CGDS) deposition technique have been investigated and comparison of phase modification is presented in the paper. Even though both techniques accelerate powder particles with high kinetic energy, the resulting coatings differ considerably in their microstructures. [..] Read more

Abstract: One of very important requirements for measuring devices is fact that measured values of observed quantity will be in specific tolerance zone of actual value also after longer period of use. Deviations of actual value can be caused by several factors – improper handling with devices, inadequate maintenance and storing, aging of materials of which they are made and last but not least, by wear of single parts.The target was to define the way of wear elimination of most faulty parts of dial gauges to obtain the maximum possible lifetime with minimal possible costs. [..] Read more

Abstract: This paper provides a study of sliding wear behavior of Cr3C2-CoNiCrAlY thermally sprayed coating at room and high temperature - 600°C. Wear testing was realized by linearly reciprocating Ball-on-Flat sliding wear test according to ASTM G133-05, so called fretting test using the tribometer CETR-UMT3. [..] Read more

Abstract: In this study, the effects of bismuth additions of 0.2, 0.5 and 1 wt% on microstructure and mechanical properties of AZ91 alloy were examined. A permanent mold casting procedure was carried out to produce the alloy billets under a mixed gas atmosphere of SF6 and CO2. [..] Read more

Abstract: This paper investigates the oxidation behaviour of aluminized flake graphite cast iron. Aluminized coatings were fabricated by hot-dipping cast iron in a pure Al or AlSi11 bath at 750 oC for 20 min. [..] Read more

Abstract: The article is focused on corrosion problems in the rolling stock. Various factors which determine speed intensity of a corrosion process are presented. [..] Read more

Abstract: This paper describes experiments for the development of methods of non-destructive, non-contact surface diagnostics. This is oriented on technical systems in metallurgical operations with usage of laser scanners and digital image processing techniques. [..] Read more

Abstract: The study compares the microstructure of the dispersion strengthened Cu – MgO composites prepared by thermo-chemical transformations of precursors and mechanical milling followed by spark plasma sintering technique. The effect of two different MgO contents (3 and 5 vol.%) on formation and stability of the copper matrix nanostructure is analysed. [..] Read more

Abstract: The abstract is describing results of characteristics studies of ceramic coatings made from corundum-baddeleyite ceramics, on deposit, boronized corrosion-proof steel AISI 303. Boronizing of steel surface is a technology known for tenths of years. [..] Read more

Abstract: Reinforced concrete service-life depends on a transport rate of corrosion stimulators, especially chlorides, towards the reinforcement through concrete cover layer. Traditional migration tests are able to state the effective diffusion coefficient; however they do not provide the information about the microstructure and its development in time. [..] Read more

Abstract: The paper describes the study of porous layers formation process made with Fe on the carbon steel base. To form the layer there was used method of consisting combination of pulse microwelding paste layer on the S235 steel surface. [..] Read more

Abstract: The Zn-Mg coatings are considered as the next generation of steel covering that should be used in automotive industry since they improve the corrosion resistance of the base material. The weakness of this coating lies in its higher hardness and lesser ability of plastic deformation in comparison to the purely zinc coatings. [..] Read more

Abstract: Currently, the methods of material coating by CVD (Chemical Vapour Deposition) and PVD (Physical Vapour Deposition) are expanding considerably. These methods are used in engineering and other industries. [..] Read more

Abstract: The paper presents the results of investigations into the microstructure of coatings made from bearing alloys on the bronze substrate. This option is used for slide bearing bushings to improve break-in parameters. [..] Read more