The Performance Evalution of Ceramic And Carbide Cutting Tools In Machining of Austemepered Ductile Irons

Yıl 2014, Cilt: 19 Sayı: 2, 67 - 76, 21.12.2014

Yahya Işık

https://doi.org/10.17482/uujfe.96281

Cited By: 4

Öz

The aim of this research is to compare TiN (PVD) coated Al2O3+Ti[C,N] mixed alumina-based (KY4400) ceramic and CVD coated carbide TiC+AI2O3+TiN (ISO P25) cutting tools in turning austempered ductile irons. Ductile cast iron samples were austenitized at 927°C and subsequently austempered for 1 hour at 400°C. The hardness of the workpiece material was measured and found to be 43.5 HRC. In the present work a series of tests were conducted in order to evaluate the tool performances by adopting tool life. In all experiments cutting forces, flank wear and surface roughness values were measured throughout the tool life. No cutting fluid was used during the turning operations. Study of the tool life and failure modes shows that tool life was determined by the flank wear and surface roughness generated on the workpiece. The main conclusion is that tool life of ceramic insert was longer than the coated carbide insert although much higher cutting speeds were used. 

Anahtar Kelimeler

ceramics; wear; tool life; cutting force; ductile iron

Östemperlenmiş Küresel Grafitli Dökme Demirlerin İşlenmesinde, Seramik ve Karbür Kesicilerin Performanslarının Karşılaştırılması

Öz

Östemperlenmiş küresel grafitli dökme demirler, üstün mekanik özelliklerinden dolayı, son yıllarda, birçok endüstriyel alanda mühendislik malzemesi olarak kullanılmaktadır. Bu çalışmada, PVD kaplamalı aluminyum oksit esaslı seramik Al2O3+Ti[C,N] (KY4400) ile CVD kaplamalı karbür kesici takımların TiC+AI2O3+TiN (ISO P25), östemperlenmiş küresel grafitli dökme demirlerin işlenmesindeki performansları karşılaştırılmıştır. Deneylerde kullanılan ÖKGDD numuneler, ilk olarak 927°C’de 90 dakika östenitlemeden sonra, tuz eriyiğinde 400°C’de 1 saat östemperlenmiştir. Sertlik 43,5 HRC olarak ölçülmüştür. Deneylerde, takım ömrü süresince kesme kuvvetleri, serbest yüzey aşınması ve yüzey pürüzlülüğü değerleri ölçülerek karbür ve seramik kesici takımların performansları karşılaştırılmıştır. Seramik kesici takımlar ile talaş kaldırma işleminde daha yüksek kesme hızı kullanılmış olmasına rağmen, karbür kesici takımlardan daha yüksek yüzey kalitesi ve daha uzun takım ömrü elde edilmiştir. 

Anahtar Kelimeler

Seramik, aşınma, takım ömrü, kesme kuvveti, dökme demir

Kaynakça

• Arsecularatnea, J.A., Zhanga, L.C., (2006). Montrossb C. Wear and tool life of tungsten carbide, PCBN and PCD cutting tools, International Journal of Machine Tools & Manufacture, 46, 482–491.
• Bhattacharyya, T.S.K., Ezugwu, E.O., Jawahid, (1989). The performance of ceramic tool materials for the machining of cast iron, Wear, 135, 147–159.
• Cakir, M.C., Bayram, A., Isik, Y., Salar, B., (2005). The effects of austempering temperature and time onto the machinability of austempered ductile iron, Materials Science and Engineering A, 407, 147–153.
• Cakir, M.C., Isik, Y., (2008). Investigating the machinability of austempered ductile irons having different austempering temperatures and times, Materials & Design, 29, 937-942.
• Camuscu, N., (2006). Effect of cutting speed on the performance of Al2O3 based ceramic tools in turning nodular cast iron. Materials and Design, 27, 997-1006.
• Chakraborty, J.A., Bhaduri, S.B., Mahajan, Y.R., (1990). Performance of ceramic cutting tools in machining cast iron. Powder Metall Int,22, 27–31.
• Diniz, A.E., Marcondes, F.C., Coppini, N.L., (2006). Tecnologia da Usinagem dos Materiais, 5th. ed. Artliber Editora; Sao Paulo.
• Diniz, A.E., Ferrer, J.A.G., (2008). A comparison between silicon nitride-based ceramic and coated carbide tools in the face milling of irregular surfaces, Journal of Materials Processing Technology, 206, 294–304.
• Dhar, N.R., (2001). Effects of cryogenic cooling by liquid nitrogen jets on machinability of steels, Journal of Materials Processing Technology, 116, 44–48.
• El-Wardany, T.I., Mohamed, E., Elbestawi, M.A., (1993). Material side flow in finish turning of hardened steel with ceramic tools, Contact problems and surface interactions in manufacturing and tribological systems, New York: ASME, PED, 67, 159–170.
• Grzesik, W., Rech, J., Zak, K., Claudin, C., (2009). Machining performance of pearlitic– ferritic nodular cast iron with coated carbide and silicon nitride ceramic tools, International Journal of Machine Tools & Manufacture, 49, 125–133.
• Haron, CHC, Ginting, A., Goh, J.H., (2001). Wear of coated and uncoated carbides in turning tool steel, Journal of Materials Process Technology, 116, 49-54.
• ISO 3685: (E), (1993) Tool-life testing with single point tools.
• Kumara A.S., Duraia, A.R., (2006). Sornakumar S. Wear behaviour of alumina based
• ceramic cutting tools on machining steels. Tribology International, 39, 191-197.
• Lin, B.Y., Chen, E.T., Lei, T.S., (1995). The effect of alloy elements on the microstructure and properties of austempered ductile irons, Scripta Metallurgica et Materialia, 32, 1363- 1367.
• Luo, X., Cheng, K., Holt, R., Liu, X., (2005). Modeling flank wear of carbide tool insert in metal cutting, Wear, 259, 1235-1240.
• Luttervelt, S.V., Childs, T.H.C., Jawahir IS, Klocke F, Venuvinod PV. (1998). Present situation and future trends in modelling of machining operations. Ann CIRP, 47-2, p. 587– 626.
• Sandvik, (1994). Modern Metal Cutting, 1st edition, Sandvik, Coromant Technical Editorial Department, Tofters Tryckeri, Sweden.
• Santhanam, A.T., Carbide’s for metal cutting, (2005). In: Kennametal Comprehensive Application Engineering Guide. Kennametal University, Latrobe, PA, 1, 3–6.
• Schneider, J. (1999). Ceramics and CBN. Manufacturing Engineering, 1, 122-166.
• Seker, U., Hasirci, H., (2006). Evaluation of machining of austempered ductile irons in terms of cutting force and surface quality, Journal of Materials Processing Technology,173, 260- 268.
• Sornakumar, T., Gopalakrishnan, M.V., Krishnamurthy, R., Gokularatnam, C.V., (1995). Development of alumina and Ce-TTZ ceramic composite (ZTA) cutting tool, Int. Journal Refract. Metals Hard Materials, 8, 375–378.
• Xu, CH., Ai, X., Huang, C.Z., (2001). Fabrication and performance of an advanced ceramic tool material, Wear, 249, 503-508.
• Yeckley, R., (2005). Ceramic grade design. In: Kennametal Comprehensive Application Engineering Guide, Kennametal University, Latrobe, PA., 12, 2–12.