Wszystkie pola: geometry of the surface - Katalog OPAC zbiorów

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Tytuł:: Geometry of remeltings and efficiency of the surface remelting process applied to cobalt alloy castings
Autorzy:: Mróz, M.
Orłowicz, W.
Tupaj, M.
Powiązania:: https://bibliotekanauki.pl/articles/381741.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: MAR-M509 alloy
surface remelting
remelting geometry
thermal efficiency
melting efficiency
stop MAR M509
przetapianie powierzchniowe
geometria przetopienia
sprawność cieplna
efektywność topienia
Opis:: The paper summarises results of measurements of remelting area geometry, thermal efficiency and melting efficiency characterising the surface remelting process applied to castings of MAR-M-509 cobalt alloy. The remelting process was carried out with the use of GTAW (Gas Tungsten Arc Welding) method in protective atmosphere of helium, at the electric current intensity in the range from 100 A to 300 A, and the electric arc scanning velocity v_s in the range from 200 mm/min to 800 mm/min. The effect of current intensity and electric arc scanning velocity on geometrical parameters of remeltings, thermal efficiency, and melting efficiency characterising the remelting process has been determined.
Źródło:: Archives of Foundry Engineering; 2013, 13, 2; 95-98
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Impact of Selected Geometry Parameter of Titanium Spatial Insert on the Surface Layer Formation on Grey Cast Iron
Autorzy:: Dziwoki, G.
Dulska, A.
Szajnar, J.
Król, M.
Powiązania:: https://bibliotekanauki.pl/articles/379470.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: grey cast iron
Titanium
Carbides
layered casting
insert
żeliwo szare
tytan
węgliki
odlewanie warstwowe
Opis:: The paper presents a method of producing a grey cast iron casting locally reinforced with a titanium insert printed using SLM method (Selective Laser Melting). This article attempts to examine the impact of the selected geometry of titanium spatial insert on the surface layer formation on grey cast iron. The scope of the research focuses on metallographic examination - observation and analysis of the structure of the reinforced surface layer on a light and scanning microscope and a hardness measurement of the titanium layer area. Based on the obtained results, it was concluded that the reaction between titanium insert and metal (grey cast iron) locally develops numerous carbides precipitation (mainly TiC particles), which increases the hardness of the reinforced surface layer and local strengthening of the material. The ratio between the thickness of the support part (grey cast iron) and the working part (titanium insert) affects the resulting layers connection structure. The properties of the obtained reinforced surface layer depend mainly on the geometry of the insert (primarily on the internal dimensions of the connector) and the volume of the casting affecting the re-melting of the insert. A more concentrated structure of carbides precipitation occurs in castings with a full connector insert.
Źródło:: Archives of Foundry Engineering; 2019, 1; 58-62
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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