TRD YÖNTEMİYLE SUPAP ÇELİĞİ YÜZEYİNDE ÜRETİLEN KAPLAMALARIN MİKROYAPI VE AŞINMA ÖZELLİKLERİ

Yıl 2016, Cilt: 11 Sayı: 3, 75 - 85, 14.07.2016

SERKAN Islak CİHAN Özorak CİHANGİR TEVFİK Sezgin MEHMET Akkaş

Öz

Bu çalışmada, kullanım yeri itibariyle sürekli aşınmaya maruz kalan supapların Termoreaktif Difüzyon (TRD) tekniği kullanılarak karışık nitrür esaslı kaplamalarla ile kaplanması ve mikroyapı özelliklerinin incelenmesi gerçekleştirilmiştir. Bu amaçla, supap yüzeyine önce nitrürasyon işlemi uygulanmıştır ve sonra TRD yöntemiyle supap yüzeyine bor geçiştirilmiştir. Üretilen kaplamaların mikroyapı ve faz bileşimi incelemesi, taramalı elektron mikroskobu (SEM), X-ışın difraktogramı (XRD), X ışını enerji dağılım spektrometresi (EDS) ile yapılmıştır. Kaplamaların sertlikleri vikers olarak ölçülmüştür. Kaplamaların aşınma davranışı, tüm numunelere aynı koşullarda uygulanan ball on disk aşınma testleri yapılarak karşılaştırılmıştır. Kaplamaların sürtünme katsayıları nispeten düşük çıkmıştır. 

Anahtar Kelimeler

TRD, Kaplama, Supap, Mikroyapı, Aşınma

Kaynakça

• Forsberg, P., Hollman, P., and Jacobson, S., (2011). Wear mechanism study of exhaust valve system in modern heavy duty combustion engines. Wear, Volume:271, Number:9–10, pp:2477-2484.
• http://dx.doi.org/10.1016/j.wear.2010.11.039.
• Benac, D.J. and Page, R.A., (2001). Integrating Design, Maintenance, and Failure Analysis to Increase Structural Valve Integrity. ASM International, PFANF83, pp:31–43.
• Smolenska, H., (2006). The gas corrosion of the cobalt base clad layer at elevated temperature. Journal of Achievements in Materials and Manufacturing Engineering, Volume:18, Number:1-2, pp:235-238.
• D’Oliveira, A.S.C.M., Paredes, R.S.C., and Santos, R.L.C., (2006). Pulsed current plasma transferred arc hardfacing, Journal of Materials Processing Technology, Vol:171, Number:2, pp:167-174. http://dx.doi.org/10.1016/j.jmatprotec.2005.02.269.
• Islak, S., Eski, Ö., Buytoz, S., Karagöz, M., and Stokes, J., (2012). Microstructure and Microhardness Characterization of Cr3C2-SiC Coatings Produced by the Plasma Transferred Arc Method, Materials Testing, Volulme:54, Number:11-12, pp:793-799.
• doi: 10.3139/120.110397.
• Buytoz, S., Orhan, A., Gur, A.K., and Caligulu, U., (2013). Microstructural Properties of Fe-Cr-C and B4C Powder Alloy Coating on Stainless Steel by Plasma Transferred Arc Weld Surfacing, Arabian Journal for Science and Engineering Vol:38, Num:8, pp:2197–2204. doi: 10.1007/s13369-013-0599-9.
• Gur, A.K., Ozay, Ç., Orhan, A., Buytoz, S., Caligulu, U., and Yigitturk, N., (2014). Wear Properties of Fe-Cr-C and B4C Powder Coating on AISI 316 Stainless Steel Analyzed by the Taguchi Method, Materials Testing: Volume:56, Number:5, pp:393-398.
• doi:10.3139/120.110578.
• Fan, X.S., Yang, Z.G., Zhang, C., Zhang, Y.D., Che, H.Q., (2010). Evaluation of vanadium carbide coatings on AISI H13 obtained by thermo-reactive deposition/diffusion technique, Surface and Coatings Technology, Volume:205, Number:2, pp:641-646. http://dx.doi.org/10.1016/j.surfcoat.2010.07.065.
• Sen, U., (2004). Kinetics of niobium carbide coating produced on AISI 1040 steel by thermo-reactive deposition technique, Materials Chemistry and Physics, Volume:86, Number:1, pp:189-194. http://dx.doi.org/10.1016/j.matchemphys.2004.03.002.
• Aghaie-Khafri, M. and Fazlalipour, F., (2008). Kinetics of V(N,C) coating produced by a duplex surface treatment, Surface and Coatings Technology, Vol:202, Num:17, pp:4107-4113.
• dx.doi.org/10.1016/j.surfcoat.2008.02.027.
• Castillejo, F.E., Marulanda, D.M., Olaya, J.J., and Alfonso, J.E., (2014). Wear and corrosion resistance of niobium–chromium carbide coatings on AISI D2 produced through TRD, Surface and Coatings Technology, Volume:254, pp:104-111.
• dx.doi.org/10.1016/j.surfcoat.2014.05.069.
• Shan, Z.J., Pang, Z.G., Luo, F.Q., and Wei, F.D., (2012). Kinetics of V(N,C) and Nb(N,C) coatings produced by V–Nb–RE deposition technique, Surface and Coatings Technology, Vol:206, Number:19–20, pp:4322-4327, dx.doi.org/10.1016/j.surfcoat.2012.04.057.
• Benko, E., Wyczesany, A., and Barr, T.L., (2000). CBN-metal/metal nitride composites, Ceramics International, Volume:26, Number:6, pp:639-644, dx.doi.org/10.1016/S0272-8842(99)00109-1.
• Benko, E., Wyczesany, A., Bernasik, A., Barr, T.L., and Hoope, E., (2000). CBN–Cr/Cr3C2 composite materials: chemical equilibria, XPS investigations, Ceramics International, Volume:26, Number:5, pp:545-550. dx.doi.org/10.1016/S0272-8842(99)00093-0.
• Zhao, Y. and Wang, M., (2009). Effect of sintering temperature on the structure and properties of polycrystalline cubic boron nitride prepared by SPS, Journal of Materials Processing Technology, Vol:209, Num:1, pp:355-359.
• dx.doi.org/10.1016/j.jmatprotec.2008.02.005.
• Ye, F., Hou, Z., Zhang, H., Liu, L., and Zhou, Y., (2010). Spark plasma sintering of cBN/β-SiAlON composites, Materials Science and Engineering: A, Volume:527, Number:18–19, pp:4723-4726.
• dx.doi.org/10.1016/j.msea.2010.04.034.
• Islak, S., Kır, D., and Çelik, H., (2013). Investigation of the usability of cubic boron nitride cutting tools as an alternative to diamond cutting tools, Archives of Metallurgy and Materials, Volume:58, Number:4, pp:1119–1123. doi: 10.2478/amm-2013-0135.
• Shenhar, A., Gotman, I., Gutmanas, E.Y., and Ducheyne, P., (1999). Surface modification of titanium alloy orthopaedic implants via novel powder immersion reaction assisted coating nitriding method, Materials Science and Engineering: A, Volume:268, Number:1–2, pp:40-46. dx.doi.org/10.1016/S0921-5093(99)00111-2.
• Arai, T., (1979). Carbide coating process by use of molten borax bath in Japan, Journal of Heat Treating, Volume:1, Number:2, pp:15–22.
• Askeland, D.R., (2003). The science and engineering materials, Cole, CA, USA, Thomson Brooks, pp:216–217.