Investigation of Surface Properties of CoCrMo Tibial Component Machining with Carbide Tool

Öz

Due to its high strength, turning of tibial component made from CoCrMo material used in knee prostheses is faced with high cutting forces, pinking, vibration and tool wear. This situation both manufacturing cost and manufacturing time. In this study, the effects of surface roughness, vibration, surface defects and micro hardness on the number of revolutions and progress of turning of CoCrMo material with carbide cutting tool were investigated. As a result of the experiments, it has been found that surface roughness and defects increase due to the increase of the progress, and the roughness decreases due to the increase of the number of revolutions. In addition, CoCrMo alloy was analyzed by machining with finite element processing temperature distributions were also determined during turning.

Anahtar Kelimeler

• CoCrMo,Turning,MicroHardness,Surface Defect,Surface Raughness

CoCrMo Tibial Komponentin Karbür Takım ile İşlenmesinde Yüzey Özelliklerinin Araştırılması

Öz

Yüksek dayanımından dolayı diz protezlerinde kullanılan CoCrMo malzemesinden yapılmış tibial bileşenin tornalanmasında büyük kesme kuvvetleri, vuruntu, titreşim ve takım aşınması gibi olumsuzluklarla karşılaşılmaktadır. Bu durum hem imalat maliyetini hem de imalat süresini artırmaktadır. Bu çalışmada, CoCrMo malzemesinin karbür kesici takım ile alın tornalanmasında devir sayısının ve ilerlemenin yüzey pürüzlülüğüne, yüzey defektlerine ve mikro sertliğe etkileri araştırılmıştır. Deneyler sonucunda ilerlemenin artmasına bağlı olarak yüzey pürüzlülüğü ve defektlerin arttığı, devir sayısının artmasına bağlı olarak ise pürüzlülüğün azaldığı tespit edilmiştir. Ayrıca CoCrMo alaşımının sonlu elamanlarla işleme analizi yapılarak tornalama boyunca sıcaklık dağılımları da tespit edilmiştir.

Anahtar Kelimeler

• CoCrMo,Tornalama,Mikro Sertlik,Yüzey Defekti,Yüzey Pürüzlülüğü

Kaynakça

1. 1. Akhtar W, Sun J & Chen W (2016). Effect of Machining Parameters on Surface Integrity in High Speed Milling of Super Alloy GH4169/Inconel 718. Materials and Manufacturing Processes. 620-627
2. 2. Bordin A, Ghiotti A & Bruschi S & Facchini L & Bucciotti L (2014). Machinability Characteristics of Wrought and EBM CoCrMo Alloys. In: 6th CIRP International Conference on High Performance Cutting, HPC2014, pp. 89 – 94
3. 3. Bordin A, Bruschi S & Ghiotti A (2014). The effect of cutting speed and feed rate on the surface integrity in dry turning of CoCrMo alloy. In: 2nd CIRP Conference on Surface Integrity (CSI), pp. 219 – 224
4. 4. Bruschi S, Ghiotti A & Bordin A, (2013). Effect of the Process Parameters on the Machinability Characteristics of a CoCrMo Alloy. Trans Tech Publications. Vols 554-557. 1976-1983
5. 5. Hassan M R, Mehrpouya M & Dawood S (2014). Review of the Machining Difficulties of Nickel-Titanium Based Shape Memory Alloys. Mechanics and Materials. 533-537
6. 6. Houchuan Y, Zhitong C & ZiTong Z (2015). Influence of cutting speed and tool wear on the surface integrity of the titanium alloy Ti-1023 during milling. International Journal Adv Manufacturing Technology. 1113-1126
7. 7. Karpuschewskia B & Döringa J (2016). Influence of the tool geometry on the machining of cobalt chromium femoral heads. In: The Second CIRP Conference on Biomanufacturing, pp. 67 – 71
8. 8. Jagtap K & Pawade R (2016). A Comparative Analysis of Cutting Forces in Precision Turning of Co-Cr-Mo Bio-implant Alloy in Dry and Wet Machining Environments. Advances in Intelligent Systems Research Vol. 137: 234-241

9. 9. Shokrani A, Dhokia V & Newman S T (2016). Cryogenic high speed machining of cobalt chromium alloy. In: 7th HPC 2016 – CIRP Conference on High Performance Cutting, pp. 404 – 407
10. 10. Sipos K, Lopez M & Trucco M (2008). Surface Martensite E-White Layer Produced By Adhesive Sliding Wear-Frıctıon In AISI 1065 Steel. Revista Latinoamericano de Metalurgia Materiales. 28(1), 46-50
11. 11. Song Y C, Park C H & Moriwaki T (2010). Mirror finishing of Co–Cr–Mo alloy using elliptical vibration cutting. Precision Engineering 34: 784–789
12. 12. Thakur D G, Ramamoorthy B & Vijayaraghavan L (2010). Effect of High Speed Cutting Parameters on the Surface Characteristics of Superalloy Inconel 718. In: Proceedings of the World Congress on Engineering 2010 Vol III WCE, June 30 - July 2, London, U.K., pp: 978-988
13. 13. Ulutan D & Özel T (2011). Machining induced surface integrity in titanium and nickel alloys: A review International Journal of Machine Tool & Manufacture. 250-280