Wyniki wyszukiwania - BazTech

1

Abrasive wear of the AlSi12Mg with Al-Si alloy for casting machine parts

Lipiński T., Bramowicz M., Szabracki P., Mikołajczyk P., Cudakiewicz M.

Technical Sciences / University of Warmia and Mazury in Olsztyn

|

2010

|

nr 13

212-220

EN

This work present results modification AlSi12%Mg alloy with modifier contained Al and Si. It modifier was has taken down was with components Al, Al7%Si i Al12%Si. homogenous modifier obtained by fast cooling of homogenous modifiers at V=200°C/s The components were put into a crucible containing liquid Al-Si alloy and kept there for one minute. The influence of modifier in reference to pulp of worked alloy on abrasive wear was introduced in graphic mould. The analysis modification process of hypo eutectic alloy AlSi12%Mg with compound modifier showed the modifying influence on structure and abrasive wear.

PL

W pracy przedstawiono wyniki badań zużycia ściernego stopu AlSi12Mg po modyfikacji modyfikatorem homogenicznym. Modyfikator przygotowywano przez chłodzenie z prędkością 200 K/s ciekłego stopu złożonego z Al, Al-7%Si i Al-12%Si. Odpowiednio rozdrobniony modyfikator dodawano do tygla wraz z ciekłym stopem AlSi12Mg na 1 minutę. Wpływ modyfikatora w odniesieniu do masy obrabianego stopu na wagowe zużycie ścierne przedstawiono w formie graficznej. Badanie zużycia prowadzono na maszynie Shoppera. Stwierdzono, że modyfikacja modyfikatorem o składzie zbliżonym do składu obrabianego stopu wpływa na strukturę i zużycie ścierne stopu AlSi12Mg.

2

Effect of environment-friendly modification of Al-12%Si alloy on its structure

Lipiński T., Góral A., Mikołajczyk P., Cudakiewicz M., Wach A.

Technical Sciences / University of Warmia and Mazury in Olsztyn

|

2008

|

nr 11

301-311

EN

The paper presents the results of a study on the modification of Al-12%Si alloy with a homogeneous modifier produced by fast cooling at a rate of 100 and 200 K/s. The homogeneous modifier had the chemical composition of the modified alloy, and it contained 0, 7, 12 and 20% Si. The modifier was mixed with liquid Al-Si alloy in the crucible for one minute. The effect of cooling rate and the modifier content of alloy mass on alloy structure was determined in the study. An analysis of the modification of eutectic Al-Si alloy with a homogeneous modifier obtained by fast cooling of the treated alloy showed that the modifier affected the structure of Al-12%Si alloy.

PL

W pracy przedstawiono wyniki badań nad modyfikacją stopu Al-12%Si modyfikatorem homogenicznym, wytworzonym przez szybkie studzenie modyfikatora z prędkością 100 i 200 K/s. Modyfikator homogeniczny ma skład chemiczny stopu modyfikowanego i zawiera 0, 7, 12 i 20% Si. Modyfikator dodawano do tygla wraz z ciekłym stopem Al-Si i przetrzymywano przez jedną minutę. W pracy przedstawiono wpływ prędkości studzenia i zawartości modyfikatora w odniesieniu do masy obrabianego stopu na jego strukturę. Analiza procesu modyfikacji eutektycznego stopu Al-Si modyfikatorem homogenicznym otrzymanym z obrabianego stopu przez szybkie studzenie wykazała oddziaływanie modyfikujące na strukturę stopu Al-12%Si.

3

Wirtualny Kampinoski Park Narodowy jako narzędzie edukacji ekologicznej

Andrzejewska M., Baranowski M., Machinko-Nagrabecka M., Mikołajczyk P., Rączka K., Rusztecka M.

Roczniki Geomatyki

|

2008

|

T. 6, z. 5

7-13

EN

Integrating environmental education with information and communication technologies (ICT) creates a unique opportunity to better convey to the young public the idea of protecting the environment. Great ease with which today's students use modern computer tools and techniques provokes their interest in participation in the activities in which such tools and techniques are widely employed. Environmental education is most frequently pursued through extracurricular activities that involve direct interactions of students with nature. Environmental Information Centre UNEP/GRID-Warsaw has undertaken and carried out a project with the goal to create a multi-functional Internet portal presenting the assets of the Kampinoski National Park. The content of the portal was developed by the Park staff; it also included data and information materials created by appropriately trained students and tourists while visiting the area. The Virtual Kampinoski National Park portal contains three virtual educational trails charted leading through the Park.s areas of particular interest and along which a number of protected nature objects can be seen. Each trail is described in a short text supplemented by multimedia materials such as 360° panoramic pictures, movies, sound, as well as nature-related thematic maps and special data files that, prior to venturing out, can be downloaded to mobile navigation devices such as GPS units or PDA units equipped with GPS modules. While on an Internet virtual hike, the user may visit a number of virtual educational trail stops with information about those particular places, see movies showing spring and summer vegetation as well as pictures shot in four directions (north, south, east and west). On a real hike, tourists equipped with GPS or PDA units and specially designed data entry questionnaires (available on the portal to download and printout) may make field observations regarding such important topics as alien tree species (their presence indicating disturbed ecological balance in a given habitat), tourism infrastructure (availability, condition), tourism pressure evidenced by stray paths created besides marked trails, and, finally, wildlife observations. In all cases, they can take measurements of geographic location of a given observed phenomenon and later transfer such field-collected data into the electronic data questionnaires available on the portal. The data is then processed by a special application and finally visualized on the portal for other users. The map server has been developed based on two software solutions, namely MapServer and Maps- Google. The former is used to display various thematic maps presenting individual components of the Park's environment, while the latter can be used to conduct virtual trips in the Park and is equipped with a number of additional multimedia features. Thus, the three educational trails are visualized on the portal along with thematic layers showing nature-related information such as vegetation or forest habitats - all against the background of the ortophotomap. Attached to each trail stop are their GPSmeasured geographic coordinates as well as illustrative materials such as pictures showing the stop and its immediate vicinity. Additionally, selected trail stops are presented by means of 360° panoramas (both photographic and movie) and archival pictures - all of them can be displayed in a special media presentation window. The Virtual Kampinoski National Park.-portal has already been put to a good use during field educational classes for school teachers and students, entitled .Navigation in the backpack.. During the classes, the participants pursued a number of educational tasks while hiking on the trails in the Kampinoski National Park. Collected data (results of field observations and measurements, their geographic coordinates, photographic documentation) were then uploaded onto the portal, processed and visualized. The students used modern navigation tools and - as an additional fun-task - they were engaged in a navigation-based field game called geocaching which is about finding .treasure boxes.-hidden in places of given coordinates.-.Navigation in the backpack.-project proved a very attractive supplement to the schools.-regular curriculum, the students could learn how to use GPS tools in the field and how to creatively use Internet.

4

Evaluation of exploitive characteristics BA1032 alloy after TIG welding method treatment

Lipiński T., Cudakiewicz M., Wach A., Mikołajczyk P.

Diagnostyka

|

2008

|

nr 4(48)

119-122

EN

The aim of this study was to make the diagnosis of the operating conditions of aluminium bronze BA 1032. Current intensity was selected on an experimental way to assure of stable melting of the surface layer together with inserted components at small current intensity. The examined questions were: the influence of surface treatment of aluminium alloy onto structure by collected energy source; the geometric parameters of the surface melted by TIG welding method of bronze surface plated alloy ingredients by using different current parameters. The results of this study indicate that the thermic exposure value, it means: the sort of concentrated energy source as well as its speed, as well as the sort of alloy additives have an influence on exploitation parameters of tested samples.

PL

Celem pracy była diagnostyka właściwości eksploatacyjnych brązu aluminiowego BA1032. Próbki do badań pobierano z obszaru ustabilizowanego oddziaływaniem skupionego źródła ciepła (stała, ustabilizowana szerokość strefy wpływu ciepła). Natężenie prądu dobrano eksperymentalnie zapewniając stabilne przetopienie warstwy powierzchniowej wraz z wprowadzanymi składnikami przy realnie małym jego natężeniu. Z analizy wyników badań wynika, że zarówno wartość ekspozycji cieplnej, tj. rodzaj zastosowanej energii źródła skupionego ciepła, prędkość jego przemieszczania jak i rodzaj dodatków stopowych wpływają na parametry eksploatacyjne obrobionych elementów.