The finishing of composite coatings in aspect of surface roughness reduction

• Autorzy: Dyl T. C.
• Języki publikacji: EN

Abstrakty

EN

The influence of the shape and grade of inserts upon the geometric structure of the composite coatings Ni-5%Al- 15%Al2O3 and alloy coatings of Ni-5% Al is considered in the paper. Nickel matrix coatings were sprayed by the Casto-Dyn 8000 torch on a steel substrate, and then subjected to straight turning. Determining of the optimum geometry of indexing is now synonymous with the selection of the optimum shape and dimensions of the insert and of an appropriate holder. According to cutting board it was selected square, triangular, trigon inserts, made of carbide and of cubic boron nitride (borazon). Machining of nickel-based coatings was carried out for the cutting speed vc = 214 m/min in the case of treatment with borazon inserts, vc = 107m/min in case of plates treated with tungsten carbide cutting, using the feed fn=0.06mm/rev and the depth of cut ap = 0.3 mm. Metal cutting the surface of steel samples coated with a composite coating containing 15% Al2O3 based on nickel, conducted for the cutting speed vc = 157 m/min when machining with borazon inserts and for vc = 83 m/min inserts with tungsten carbide for feed fn = 0.06 mm/rev and depth of cut ap = 0.3 mm. Highly precise finishing of flame spraying composite and alloy coatings was carried out using turning by tool with borazon inserts. Flank (VB) and attack (KB) wear coefficient of inserts while maintaining a constant spiral cutting length (SCL) were determined. Important elements parts (such as engines, pumps, centrifugal separators) are regenerated during long-term utilization. This paper proposes the use of regenerated technology subsonic flame thermal spraying and surface finishing by turning composite and alloy coatings of ship machinery parts.

Słowa kluczowe

EN

composite coatings; flame spraying; cutting inserts; surface finishing

• 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: 2013
• Tom: Vol. 20, No. 2
• Strony: 75--81
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Dyl T. C.

• Gdynia Maritime University, Faculty of Marine Engineering, Department of Marine Materials and Technology, Morska Street 81-87, 81-225 Gdynia, Poland

Bibliografia

• [1] Chang, J. T., Yeh, C. H., He, J. L., Chen, K. C., Cavitation erosion and corrosion behavior of Ni–Al intermetallic coatings, Wear, 255, pp.162-169, 2003.
• [2] Dyl, T., Starosta, R., Determining the effect of the geometry and type of inserts on the geometric structure of turned composite coatings, Inżynieria Materiałowa, No. 6, pp. 701-704, 2012.
• [3] Dyl, T., Starosta, R., Effect of the ceramic dispersion in the nickel matrix composite coatings on corrosion properties after plastic working, Solid State Phenomena, 183, pp. 43-48, 2012.
• [4] Dyl, T., Starosta, R., The influence of treatment parameters on the quality of MMC coatings surfaces applied to recondition parts of ship machinery, Journal of POLISH CIMAC, Vol. 3, No. 2, pp. 39-46, 2008.
• [5] Grądzka-Dahlke, M., Bukrym, A., Choińska, E., Effect of TiN coating on functional properties of implant titanium alloy, Solid State Phenomena, 147-149, pp. 782-787, 2009.
• [6] Machining powder of sprayed layers 19000, 21000, 12000, Materials of the company Castolin Eutectic, 2001.
• [7] Manual machining, AB Sandvik Coromant, Sandviken, Sweden 2010.
• [8] Molins, R., Normand, B., Rannou, G., Hannoyer, B., Liao, H., Interlamellar boundary characterization in Ni-based alloy thermally sprayed coating, Materials Science and Engineering, A351, pp. 325-333, 2003.
• [9] Sampath, S., Jiang, X. Y., Matejicek, J., Prchlik, L., Kulkarni, A., Vaidya, A., Role of thermal spray processing method on the microstructure, residual stress and properties of coatings: an integrated study for Ni-5 wt.%Al bond coats, Materials Science and Engineering, 364, pp. 216-231, 2004.
• [10] Sierra, C., Vazquez, A. J., NiAl coating on carbon steel with an intermediate Ni gradient layer, Surface and Coatings Technology, 200, pp. 4383-4388, 2006.
• [11] Starosta, R., Corrosion of Ni-Al and Ni-Al-Al2O3 flame sprayed coatings of CastoDyn8000 system in 0.01MH2SO4 and 3.5%NaCl solutions, Solid State Phenomena, Vol. 183, pp. 185-192, 2012.
• [12] Starosta, R., Skoblik, R., Dyl, T., The influence of plastic working on the selection properties of the nickel – aluminium alloy coatings, Journal of KONES Powertrain and Transport, Vol. 14, No. 2, pp. 441-448, 2007.
• [13] St-Georges, L., Development and characterization of composite Ni-Cr+WC laser cladding, Wear, 263, pp. 562-566, 2007.