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Laserowe teksturowanie płaszcza tłoka silnika spalinowego

Napadłek W., Przetakiewicz W.

Inżynieria Materiałowa

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2011

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Vol. 32, nr 4

637-640

PL

W artykule przedstawiono wyniki badań laboratoryjnych laserowego teksturowania płaszcza tłoka silnika spalinowego w celu wytworzenia na jego powierzchni zasobników oleju. W pierwszym etapie badań na próbkach ze stopu aluminium dobrano najlepsze parametry obróbki laserowej (długość promieniowania, gęstość mocy, układ geometryczny), przy których wykonano teksturowanie płaszcza tłoka silnika. W drugim etapie badań o charakterze porównawczym analizowano topografię powierzchni płaszcza tłoka po tradycyjnej obróbce mechanicznej oraz po teksturowaniu laserowym. Dobór parametrów obróbki laserowej realizowano na podstawie uzyskanych wyników z analizy topografii powierzchni, twardości oraz mikrostruktury. Ablacyjna impulsowa mikroobróbka laserowa pozwala na wytworzenie mikrozasobników olejowych na płaszczu i piaście tłoka wykonanego ze stopu aluminium AlSi12Cu1Ni1Mg (EN AW-2816). Stosując wiązkę laserową o gęstości mocy q = 0,90ź106 W/cm2, czasie trwania impulsu t = 155 ns i częstotliwości repetycji f= 5 Hz uzyskano zasobniki olejowe o powtarzalnych wymiarach geometrycznych: średnica fi = 70÷100 um, głębokość H < 20 um, wysokość wypływki h < 2 um. Badania wykazały bardzo korzystny i powtarzalny układ geometryczny zasobników oleju, o kształcie regularnych półczasz kulistych, co rokuje duże nadzieje na możliwość kontynuacji badań z wykorzystaniem silnika spalinowego.

EN

The results of investigations laboratory of laser texturing overcoat piston combustion engine in the aim of producing on his surface the containers of oil were introduced in the article. The best parameters of laser processing (the length of the radiation, the thickness of the power, geometrical arrangement) were chosen in first stage of audits on samples from the melt of aluminum, near which the texturing of the sheath piston of the engine was made. The topography of the surface of the sheath piston after the traditional mechanical processing and after laser texturing was analyzed in second stage of comparative audits. The selection of the parameters of the laser processing was realized in the support about got results from the analysis of the topography of surface, hardness and microstructure. Pulse laser ablative micromachining enables the oil micro trays production on the coat and the hub of the piston made of aluminum alloy such a AlSi12Cu1Ni1Mg (EN AW-2816). Using a laser beam with power density of q = 0.90ź106 W/cm2, pulse duration t = 155 ns, repetition frequency f = 5 Hz, the oil micro trays with reproducible geometrical dimensions: diameter fi = 70÷100 um, the depth H < 20 um, height of micro burr h < 2 um, were obtained. Audits showed very profitable and repetition geometrical arrangement of the containers of oil what, about the shape cubic spherical, augurs large he will impale on the possibility of the farther continuation of audits on the real object - the combustion engine.

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The laser texturing of overcoat piston of combustion engine for enlargement of his resistance on the waste in the conditions of the friction

Napadłek W.

Journal of KONES

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2010

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Vol. 17, No. 4

361-367

EN

The results of investigations laboratory of laser texturing overcoat piston combustion engine in the aim of producing on his surface the containers of oil were introduced in the article. The best parameters of laser processing (the length of the radiation, the thickness of the power, geometrical arrangement) were chosen infirst stage ofaudits on samples from the melt of aluminum, near which the texturing of the sheath real piston of the engine was made. The topography of the surface of the sheath piston after the traditional mechanical processing and after laser texturing was analysed in second stage of comparative audits. The selection of the parameters of the laser processing was realized in the support about got results from the analysis of the topography of surface, microhardness and microstructure. Pulse laser ablative micromachining enables the oil micro trays production on the coat and the hub of the piston made of aluminum alloy such an AlSi12CulNilMg (EN AW-2816). Using a laser beam with power density of q = 0.90 * W6 W/cm2, pulse duration t = 155 ns, repetition frequency f = 5 Hz, the oil micro trays with reproducible geometrical dimensions: diameter = 70-empty set 100 mi m, the depth H less-than or equal to 20 urn, height of micro burr h less-than or equal to 2 mi m , were obtained. Audits showed very profitable and repetition geometrical arrangement of the containers of oil what, about the shape cubic spherical, augurs large hę will impale on the possibility of the farther continuation of audits on the real object - the combustion engine.

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Laser ablation cleaning of the aeronautical jet engine turbine paddles

Napadłek W., Trawiński G.

Journal of KONES

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2010

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Vol. 17, No. 4

369-375

EN

Preliminary results ablation of the laser cleaning was introduced in the article elements of the turbine engine of airplane (blades, guide rings, the chambers of oxidising). Cleaning of these units was realized to obtainment of the metallically fine superficial layer for the chosen melts of Fe - C and on the datum feature Nor, prepare to the processes welds or the spraying thermal of coating barriers thermal TBCS. The chosen results of the selection of parameters were introduced in the support about steorology and the cleanness of the superficial layer. Various parameters: laser radiation power density, impulse duration, the frequency control and the laser spot lap stage were applied in laboratory experiments. Laser radiation influence effects were estimated on the surface photo, microstructure, chemical composition in microzones investigation basis. The stereoscopic microscopy, electron scanning microscopy (SEM) and the X-ray analysis were used in investigations. Very good cleaning effects are from oxides, accumulations of turbine blades. In particular, studied elements of aircraft turbine engine, characteristic surface and area topography of heat resistant nickel alloy, tests results of chemical constitution in the characteristic micro-zones of surface layer of high-temperature creep are presented in the paper.