Selection of cutting parameters of turning the Ni-Al and Ni-Al-Al2O3 flame sprayed coatings

• Autorzy: Starosta R. , Chabowski R.
• Języki publikacji: EN

Abstrakty

EN

The process of flame sprayed is a technology affordable and easy to implement. It does not reąińre great skill of the operator. This method is not associated with expensive workstation equipment. It may therefore be used with successfor the regeneration of machine parts bv the crew of vessel engine room. Flame sprayed coatings are characterized by porosity, oxide inclusions presence and large real area of surface. In order to obtain adequate surface roughness coatings must be applied finishing. For this purpose, the turning and grinding are used. In the paper a turning to finishing flame sprayed coatings was proposed. Coatings of Ni-5%Al and Ni-5% Al-15% Al2O3 obtained by powder flame spraying, were studied. Torch of "Casto-Dyn 8000" was used. In practice, the substrate and the t herma l ly sprayed coating are processed by the same cutting tool. For example, Messner Eutectic Castolin company offers r\vo types of tools: "Rototool II/" (square insert) and "Rototool III" with a removable cylindrical insert. Average surface roughness of coating after machined tool "Rototool II" was Ra = 3 mi m. This surface often requires grinding. The different tool geometry was suggestedfor better texture of coatings surface. Workpiece was machined by tool with CBN insert WNGA080408S01030A mounted in holder DWLNRL-2525M08 (cutting inserts beta = 80°, approach angle Kr = 95°, nose radius - 0.8 mm, relief angle alfa = 6°, rake angle gamma= -6°). The influence of cutting speed, feed rate, depth of turning on the coating surface roughness was estimated. The following cutting parameters: cutting speed Vc = 45-214 m/m in, feed rate f = 0.06-0.2 mm/rev, depth of cut ap = 0.05-0.3 mm. The lowest value of the roughness of the alloy (Ra = 0.5 mi m) and composite (Ra = 0.8 mi m) coatings were obtained by using cutting parameters: Vc = 214 m/min, f= 0.06 mm/rev, ap = 0.4 mm.

Słowa kluczowe

EN

thermal spray coatings; coating turning; CBN

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 4
• Strony: 463--469
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Starosta R.

autor

Chabowski R.

• Gdynia Maritime University Faculty of Marine Engineering, Department of Marine Maintenance Morska Street 81-87, 81-225 Gdynia, Poland tel: [phone],fax: [phone],

Bibliografia

• [1] Dyl, T., Starosta, R., Skoblik, R., Obróbka wykańczajaca powłok MMC w aspekcie umocnienia i zmniejszenia chropowatości powierzchni, Kompozyty, Vol. 8, pp. 147-151, 2008.
• [2] Formanek, B., Szymański, K., Natryskiwane cieplnie płomieniowo kompozytowe powłoki zawierające węgliki chromu, tytanu i wolframu, Kompozyty, Vol. 6, pp. 52-57, 2006.
• [3] Korzyński, M., Metodyka eksperymentu – planowanie, realizacja i statystyczne opracowanie wyników eksperymentów technologicznych, Wydawnictwo Naukowo-Techniczne, Warszawa 2006.
• [4] Li, W., et al., Residual stresses in face finish turning of high strength nickel-based superalloy, Journal of Materials Processing Technology, Vol. 209, pp. 4896-4902, 2009.
• [5] Morel, S., Powłoki natryskiwane cieplnie, Wydawnictwo Politechniki Częstochowskiej, Częstochowa 1997.
• [6] Nadasi, E., Nowoczesne metody metalizacji natryskowej, Wydawnictwo Naukowo-Techniczne, Warszawa 1975.
• [7] Pawade, R. S., et al., An investigation of cutting forces and surface damage in high-speed turning of Inconel 718, Journal of Materials Processing Technology, Vol. 192-193, pp. 139-146, 2007.
• [8] Picas, J. A., Forn, A., Matthaus, G., HVOF coatings as an alternative to hard chrome for pistons and valves, Wear, Vol. 261, pp. 477-484, 2006.
• [9] Popczyk, M., Budniok, A., Charakterystyka struktury elektrolitycznych warstw kompozytowych na osnowie amorficznego niklu, zawierających składnik tlenkowy i metaliczny, Kompozyty, Vol. 5, pp. 47-52, 2005.
• [10] Sandvik Coromant, Katalog główny, Narzędzia skrawające firmy Sandvik Corromant, 2009.
• [11] Starosta, R., Zieliński, A., Effect of chemical composition on corrosion and wear behaviour of the composite Ni-Fe-Al2O3 coating, Journal of Materials Processing Technology, Vol. 157-158, pp. 434-441, 2004.
• [12] Starosta, R., Properties of thermal spraying Ni-A. coatings. Advances in Materials Science. Vol. 9, No. 1, pp. 30-40, 2009.
• [13] Starosta, R., Testing of regenerative thermal spraying Ni-Al alloy coatings, Journal of Polish CIMAC, Diagnosis, Reliability and Safety, Vol. 3 No. 2, pp. 155-161, 2008.
• [14] Szeptycka, B., Gajewska-Midziałek, A., Investigations of the wear resistance of composite coatings Ni-SiC, Kompozyty, Vol. 5, pp. 7-10, 2005.
• [15]Wądołowki, D., Wpływ nagniatania na wybrane właściwości powłok natryskiwanych cieplnie, praca niepublikowana, Gdynia 2009.