Solid particle erosion behavior of SiMo ductile cast iron

Yıl 2018, Cilt: 1 Sayı: 1, 22 - 27, 31.12.2018

Gülşah Aktaş Çelik , Şeyda Polat , Şaban Hakan Atapek Sinan Fidan

Öz

SiMo
ductile cast iron has been developed to
be used at high temperatures as exhaust manifold
material. Si and Mo contents in its chemical composition provide high
temperature oxidation resistance and high temperature strength.   During service,
hot corrosive exhaust gas flows through the exhaust manifold and may cause
erosion of the manifold surfaces. Thus, in this study, it was aimed to evaluate
the performance of SiMo cast iron under severe solid particle erosion
conditions, against aluminum oxide particles at 30°, 45°, 60° and 90°
impingement angles. Surface degradation of tested alloys were characterized using
scanning electron microscope. It was observed that erosion rate increased with
increasing impingement angle up to 45°, then decreased as the angle increased,
since the mechanism of material removal changed. While ploughing occurred at
lower angles, work hardening took place on the worn surface at higher angles.

Anahtar Kelimeler

SiMo ductile cast iron, solid particle erosion, characterization

SiMo sünek dökme demirin katı partikül erozyonu

Öz

SiMo sünek dökme demir yüksek sıcaklıklarda ekzoz manifold
malzemesi olarak geliştirilmiştir. Kimyasal kompozisyonunda bulunan Si ve Mo
elementleri yüksek sıcaklık oksidasyon direnci ve yüksek sıcaklık mukavemeti
sağlamaktadır. Çalışma koşullarında yüksek sıcalıktaki korozif ekzoz gazı ekzoz
manifoldundan geçer ve manifold yüzeyinde erozyona neden olabilir. Bu
çalışmada, SiMo dökme demirin katı partikül erozyon davranışının aluminyum
oksit partikülleri ile 30°, 45°, 60° ve 90° çarpma açıları kullanılarak
incelenmesi hedeflenmiştir.  Yüzeyde
meydana gelen bozunmalar tarama elektron mikroskopu kullanılarak incelenmiştir.
Erozyon oranı 45° çarpma açısına kadar artış gösterirken, malzeme kaybı
mekanizmasındaki değişiklik nedeniyle daha bu oran yüksek açılarda
azalmıştır.  Düşük açılarda pulluklama
etkin mekanizma iken yüksek açılarda yüzeyde deformasyon sertleşmesi meydana
gelmektedir.

Anahtar Kelimeler

SiMo sünek dökme demir, katı partikül erozyonu

Kaynakça

• [1] P. Matteis, G. Scavino, A. Castello, D. Firrao, “High-cycle fatigue resistance of Si-Mo ductile cast iron as affected by Temperature and strain rate”, Metall and Materi Trans A, vol.46A, p. 4086-4094, 2015.
• [2] L. M. Åberg, C. Hartung, “Solidification of SiMo nodular cast iron for high temperature applications”, Trans Indian Inst Met vol. 65, no.6, p.633–636, 2012.
• [3] M. Ekström, S.Jonsson,” High-temperature mechanical-and fatigue properties of cast alloys Intended for use in exhaust manifolds”, Mater. Sci. Eng., A, vol 616, p.78–87, 2014.
• [4] P. Matteis, G. Scavino, A. Castello, D. Firrao, High temperature fatigue properties of a Si-Mo ductile cast iron, Procedia Mater. Sci., vol. 3, p. 2154-2159, 2014
• [5] D. Li, Discussion of “Microstructure and hot oxidation resistance of SiMo ductile cast irons containing Si-Mo-Al”, Metall and Materi Trans B, vol. 49B, p. 858-859, 2018.
• [6] M. Ekström, P. Szakalos, S. Jonsson, Influence of Cr and Ni on high-temperature corrosion behavior of ferritic ductile cast iron in air and exhaust gases, Oxid. Met. vol. 80, p. 455–466, 2013.[7] A. A. Partoaa, M. Abdolzadeh, M. Rezaeizadeh, “Effect of fin attachment on thermal stress reduction of exhaust manifold of an off road diesel engine”, J. Cent. South Univ. vol. 24 p. 546−559, 2017.
• [8] L. C. Chang, I. C. Hsui, L. H. Chen, T. S. Lui, “A study on particle erosion behavior of ductile irons”, Scripta Materialia, vol. 52, p. 609-613, 2005.
• [9] M. A. Islam, Z.N. Farhat, “Effect of impact angle and velocity on erosion of API X42 pipeline steel under high abrasive feed rate”, Wear, vol. 311, p. 180-190, 2014. [10] M. Divakar, V. K. Agarwal, S. N. Singh, “Effect of the material surface hardness on the erosion of AISI316”, Wear, vol. 259, p. 110-117, 2005.
• [11] K. Yıldızlı, M. B. Karamış, F. Nair, “Erosion mechanisms of nodular and gray cast irons at different impact angles”, Wear, vol. 261, p. 622-633, 2006.
• [12] L. C. Chang, I. C. Hsui, L. H. Chen, S. T. Lui, “Influence of graphite nodules on the particle erosion of spheroidal graphite cast irons”, Wear, vol 257, p. 1125-1132, 2004.
• [13] J. R. Laguna-Camacho, A. Marquina-Cháves, J. V. Méndez-Méndez, M. Vite-Torres, E. A. Gallardo-Hernández, “Solid particle erosion of AISI 304, 316 and 320 stainless steels”, Wear, vol. 301, p. 398-405, 2013.
• [14] G. Sundararajan, M. Roy, “Solid particle erosion behavior of metallic materials at room and elevated temperatures”, Tribol. Int. vol. 3, no. 5, p. 339-359, 1997.
• [15] Ş. H. Atapek, S. Fidan, “Solid particle erosion of cast alloys used in the mining industry”, Int. J. Miner., Metall. Mater, vol. 22, no. 12, p. 1283-1292, 2015.