- Tytuł:
- The Influence of Laser Surface Remelting on the Microstructure of EN AC-48000 Cast Alloy
- Autorzy:
-
Piątkowski, J.
Grabowski, A.
Czerepak, M. - Powiązania:
- https://bibliotekanauki.pl/articles/380632.pdf
- Data publikacji:
- 2016
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
surface treatment
Al-Si alloy
laser surface remelting
rapid solidification
obróbka powierzchniowa
stop Al-Si
laserowe przetapianie powierzchni
krystalizacja szybka - Opis:
- Paper present a thermal analysis of laser heating and remelting of EN AC-48000 (EN AC-AlSi12CuNiMg) cast alloy used mainly for casting pistons of internal combustion engines. Laser optics were arranged such that the impingement spot size on the material was a circular with beam radius rb changes from 7 to 1500 μm. The laser surface remelting was performed under argon flow. The resulting temperature distribution, cooling rate distribution, temperature gradients and the depth of remelting are related to the laser power density and scanning velocity. The formation of microstructure during solidification after laser surface remelting of tested alloy was explained. Laser treatment of alloy tests were perform by changing the three parameters: the power of the laser beam, radius and crystallization rate. The laser surface remelting needs the selection such selection of the parameters, which leads to a significant disintegration of the structure. This method is able to increase surface hardness, for example in layered castings used for pistons in automotive engines.
- Źródło:
-
Archives of Foundry Engineering; 2016, 16, 4; 217-221
1897-3310
2299-2944 - Pojawia się w:
- Archives of Foundry Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł