An examination of different heat treatment effects to the fracture parameters of connecting rod made from C70S6 steel

Year 2013, Volume: 25 Issue: 2, 75 - 90, 10.09.2013

Zafer Ozdemir Tekin Ozdemir Ziya Aksoy Sait Ozmen Eruslu

https://doi.org/10.7240/mufbed.v25i2.075

Abstract

The main microstructure of the crackable C70S6 steel is pearlite (%90 of the structure is about pearlite). Changing the microstructure by various heat treatment applications such as hardening&quenching, annealing, tempering can be economic and technologic alternatives to the use of crackable C70S6 steel. In this study, the microstructure and the metallography of the crackable C70S6 steel is examined by various heat treatment applications. Besides this, some fracture experiments has been carried out for each heat treatment application. Finally, it has been seen that tempered martensite structure can be an important alternative to the pearlitic crackable C70S6 connecting rods.

Keywords

tempered martensite, crackable connecting rod, heat treatment, metallographic

References

• J.W. Qiu , Y. Liu , Y.B. Liu , B. Liu , B. Wang , Earle Ryba , H.P. Tang, Microstructures and mechanical properties of titanium alloy connecting rod made by powder forging process, Materials and Design Elsevier 213-219, 2011
• Afzal, A., Fatigue behavior and life predictions of forged steel and powder metal connecting rods. MSc Thesis, University of Toledo, Toledo, (2004).
• Z.Aksoy, Z.Özdemir, T.Özdemir, A metallographic examination of fracture splitting C70S6 steel used in connecting rods, Fen Bilimleri Dergisi, Marmara Üniversitesi, 24(2) 2012, 45-58
• Z.Aksoy, Z.Özdemir, T.Özdemir, Kırılarak İki Parçaya Ayrılabilen Biyel Kollarının Ayrılma Parametreleri Üzerine Bir İnceleme, Fen Bilimleri Dergisi, Sakarya Üniversitesi, 16(2) 2012, 113-122
• Z, Gu,. Yang, S., Ku, S., Zhao, Y,. ve Dai, X., "Fracture splitting technology of automobile engine connecting rod". Journal of Advanced Manufacturing Technology, 25, 883-887, (2005).
• Manabu Kubota, Tokyo (JP); Shinya Teramoto, Tokyo (JP) Hot-Forgıng Mıcro-Alloyed Steel And Hot-Rolled Steel Excellent In Fracture-Splitability And Mechınabılıty, And Component Made Of Hot-Forged Mıcroalloyed Steel, Unıted States Patent Application, US 2010/0143180, 2010.
• X Zhang, Z., Q Cai, G. Zhou et al., "Microstructure and Mechanical Properties of V-Ti-N Microalloyed Steel Used For Fracture Sptlitting Connecting Rod” Journal of Material Science, 46:1789-1795, 2011.
• Liming, Z., Shuqing, K., Shenhua,Y., Lili, Li. ve Fei. Li., "A study of process parameters during pulsed Nd:YAG laser notching of C70S6 fracture splitting connecting rods". Optics and Laser Technology, ,42: 985-993, 2009.
• Deen, Z., Harris, S.J., McCartney, D.G., Pashby, I.R., Towell, J., Shipway P.H., et al., "The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6) steel", Material Science and Engineering, 489, 273-284, 2008.
• Roman, C., Boris, A. ve Dimitrij, K., "A metallographic examination of a fractured connecting rod". Institute of Metals and Technology, 42, 93-95, (2007).
• Kou, S.Q., Wang, J.W., ve Gao, Y., "Microstructure and fracture splitting properties of a fracture splitting notch produced in a connecting rod (C70S6) using pulsed laser grooving". Lasers In Engineering, 20, 381–395, (2010).
• Iwazaki, S., Isobe, T. ve Kubato, T., "Split connecting rod and engine". United States Patent, 159, 1-31, (2007).
• Guirgos, S., "Process to fracture connecting rods and the like with resonance fatigue". United States Patent Application Publication, 225,1-13, (2004).
• Hye, K., Tae, K., Tai-Joo, C., Hyun, Kim. ve Soon-Jik, H., "Fatigue Characteristics of High Strength C70S6 and SMA40 Steels". Materials Science and Engineering, 527, 2813– 2818, (2010).
• W.Callister, David G.Rethwisch, Fundamentels of Material Science and Engineering, The University of Iowa, 2008.