The Influence of Laser Surface Remelting on the Microstructure of EN AC-48000 Cast Alloy

• Autorzy: Piątkowski J. , Grabowski A. , Czerepak M.
• Języki publikacji: EN

Abstrakty

EN

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 r_b 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.

Słowa kluczowe

EN

surface treatment; Al-Si alloy; laser surface remelting; rapid solidification

PL

obróbka powierzchniowa; stop Al-Si; laserowe przetapianie powierzchni; krystalizacja szybka

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 217--221
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Piątkowski J.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Grabowski A.

• Poland Institute of Physics – CSE, Krzywoustego 2, 41-100 Gliwice, Poland

autor

Czerepak M.

• Federal – Mogul Powertrain Gorzyce, Odlewników 52, 39-432 Gorzyce, Poland

Bibliografia

• [1] Watkins, K., McMahon, M. & Steen, W. (1997). Microstructure and corrosion properties of laser surface processed aluminum alloys. Materials Science and Engineering. 231(1-2), 55-61.
• [2] Tański, T., Makieła, W., Janicki, D., Tomiczek, B. & Król, M. (2016). Properties of the aluminum alloy EN AC-51100 after laser surface treatment. Archives of Metallurgy and Materials. 61(1), 199-204.
• [3] Kusiński, J., Kąc, S., Kopia, A., Radziszewska, A., and other. (2012). Laser modification of the materials surface layer – a review paper. Bulletin of the Polish Academy of Sciences - Technical Sciences. 60(4), 711-728.
• [4] Grabowski, A. (2013). The interaction of the laser beam composites silumin – SiC particles. Gliwice: Silesian University of Technology, 30-40. (in Polish).
• [5] Jones, H. (1984). The status of rapid solidification of alloys in research and applications. Journal of Material Science. 19(4), 1043-1076.
• [6] Nowak, M., Bober, Ł., Borkowski, B., Kępińska, M., Szperlich, P., Stróż, D. & Sozańska, M. (2013). Quantum efficiency coefficient for photogeneration of carriers in SbSI nanowires. Optical Materials. 35, 2208-2216.
• [7] Ashby, M. & Easterling, K. (1984). The transformation hardening of steel surfaces by laser beams - I. Hypo-eutectoid steels. Acta Metallurgica. 32(11), 1935-1948.
• [8] Bass, M. (1983). Laser materials processing. Elsevier Science Publishing Company Inc., 238-260.
• [9] Piątkowski, J. & Kamiński, P. (2015). Chosen Aspects of Quality Defects of “Alphin” Inserts in Combustions Pistons. Archives of Foundry Engineering. 15(4), 61-65.
• [10] Piątkowski, J. (2015). AlSi17Cu5Mg alloy as future material for casting of pistons for internal combustion engines. Metalurgija. 54(3), 511-514.
• [11] Mullins, W. & Sekerka, R. (1964). Stability of planar interface during solidification of dilute binary alloy. Journal of Applied Physics. 35, 444-451.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.