Autor: Tofil, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Influence of Treatment Parameters on the Microstructure, Properties and Bend Angle of Laser Formed Construction Bars
Autorzy:: Kurp, P.
Mucha, Z.
Tofil, S.
Mulczyk, K.
Powiązania:: https://bibliotekanauki.pl/articles/353966.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: laser forming
laser treatment
microstructure
Fourier number
Opis:: In this paper, the authors presented the research on laser formed construction bars made of C20 steel on the example of the T-shape. The CO₂ TRUMPF TruFlow 6000 laser was used in the research. The influence of the laser treatment parameters (the power and speed of the heat source) on the volume of the bend angle, structure and properties of the elements (hardness and tensile strength) was examined. On the basis of the results obtained from the conducted experiments, the authors suggested a way of selecting treatment parameters so that the element should meet the strength assumptions at the allowable time of its implementation.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2B; 1151-1156
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The influence of impurities on the operation of selected fuel ignition systems in combustion engines
Autorzy:: Różowicz, S.
Tofil, S.
Powiązania:: https://bibliotekanauki.pl/articles/141085.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: electrode burning
fuel mixture impurities
ignition system
spark plugs
Opis:: The paper attempts to determine the impact of fuel impurities on the spark discharge energy and the wear of the spark plug electrode. Spark plugs were analyzed in two typical configurations of the ignition system. A number of tests were conducted to determine the wear of the spark plug electrode exposed to different types of impurities. The spark discharge energy for new and worn spark plugs was determined through calculation.
Źródło:: Archives of Electrical Engineering; 2016, 65, 2; 349-360
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Badanie trwałości złącza NiCr-Pt mikrospawanego laserem Nd:YAG pracującego w silniku spalinowym o zapłonie iskrowym
Research of durability joints NiCr-Pt microwelding by Nd:YAG laser working in an internal-combustion engine with spark ignition
Autorzy:: Tofil, S.
Antoszewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/270050.pdf
Data publikacji:: 2011
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: spawanie laserowe
mikrostruktura
mikrotrwałość
odporność elektroerozyjna
laser welding
microstructure
micro life
electro resistance
Opis:: W pracy przedstawiono badania trwałości złącza NiCr-Pt mikrospawanego laserem Nd:YAG pracującego w silniku spalinowym o zapłonie iskrowym. Przedstawiono wybrane problemy mikrospawania elementów małogabarytowych laserem Nd:YAG oraz wyniki prób tego spawania. W ramach aktualnie prowadzonych badań wykonano pomiary mikrotwardości i obserwacje mikrostruktury przy użyciu mikroskopu metalograficznego oraz skaningowego. Badania eksploatacyjne wykonano na mikroskopie stereoskopowym OLYMPUS SZX10 oraz kształtografie TOPO 01Kv2.
This paper presents research of NiCr-Pt joints durability mikrowelded by Nd:YAG laser working in an internal-combustion engine with spark ignition. The paper presents selected problems of the microwelding of undersized elements made by a Nd:YAG laser and the results of tests. As part of currently conducted research measurements were performed of the micro hardness and observation of the microstructure using the metallographic and scanning electron microscopy. Exploitation tests were performed on a stereoscopic microscope OLYMPUS SZX10 and shaper machine TOPO 01Kv2.
Źródło:: Inżynieria Maszyn; 2011, R. 16, z. 4; 52-59
1426-708X
Pojawia się w:: Inżynieria Maszyn
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: An Analysis of the Microstructure, Macrostructure and Microhardness of Nicr-Ir Joints Produced by Laser Welding with and without Preheat
Autorzy:: Różowicz, S.
Tofil, S.
Zrak, A.
Powiązania:: https://bibliotekanauki.pl/articles/958213.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: microstructure
microhardness
microjoint
laser welding
refractory metals
Opis:: This paper discusses some of the basic problems involved in laser welding of dissimilar materials with significant differences in melting points. It focuses on the micro and macrostructure of laser welded NiCr-Ir microjoints used in central spark plug electrodes. The joints were produced by welding with and without preheat using an Nd,YAG laser. The structure and composition of the welded joints were analyzed by means of a light microscope (LM) and a scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) spectrometer. The microhardness of the weld area was also studied.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2B; 1157-1162
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: An Analysis of Laser-Welded Nicr-Ir and Nicr-Pt Micro Joints on Spark Plug Electrodes in Biogas-Fuelled Engines
Autorzy:: Grabas, B.
Tofil, S.
Napadłek, W.
Powiązania:: https://bibliotekanauki.pl/articles/351967.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: microwelding
laser
spark plugs
refractory materials
biogas
Opis:: The paper deals with the laser beam welding of tips to central and side spark plug electrodes made of a nickel-chromium alloy. The tips attached to the central electrodes were made from a solid iridium wire 0.8 mm in diameter and 2 mm in length, while the tips connected to the side electrodes were made from a platinum wire 1.5 mm in diameter and 0.25 mm in thickness. In both cases, accurate positioning of the tips was required before they were resistance welded to the electrodes. Then, a fillet weld was produced with an Nd:YAG laser using single, partly overlapping conductive pulses. The laser welding was performed at different laser power levels and pulse durations. Metallographic sections of the joints were prepared to observe changes in the microstructure and determine their correlation with the changes in the process parameters. The results were used to select appropriate welding parameters for the materials joined. The microscopic analysis indicated welding imperfections such as micro cracks at the interface between the elements joined. The tips welded to the spark plug electrodes can help extend the service life of spark plugs in highly corrosive environments.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2B; 1163-1167
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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