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http://dx.doi.org/10.12656/jksht.2015.28.6.300

Computational Simulation of Carburizing and Quenching Processes of a Low Alloy Steel Gear  

Lee, Kyung Ho (Department of Materials Science and Engineering, Yonsei University)
Han, Jeongho (Department of Materials Science and Engineering, Yonsei University)
Kim, Gyeong Su (Material Research Department, Hyundai Heavy Industries)
Yun, Sang Dae (Quality Assurance Team, Sungbo Powertrain & Technology)
Lee, Young-Kook (Department of Materials Science and Engineering, Yonsei University)
Publication Information
Journal of the Korean Society for Heat Treatment / v.28, no.6, 2015 , pp. 300-309 More about this Journal
Abstract
The aim of the present study was to predict the variations in microstructure and deformation occurring during gas carburizing and quenching processes of a SCM420H planetary gear in a real production environment using the finite element method (FEM). The motivation for the present study came from the fact that previous FEM simulations have a limitation of the application to the real heat treatment process because they were performed with material properties provided by commercial programs and heat transfer coefficients (HTC) measured from laboratory conditions. Therefore, for the present simulation, many experimentally measured material properties were employed; phase transformation kinetics, thermal expansion coefficients, heat capacity, heat conductivity and HTC. Particularly, the HTCs were obtained by converting the cooling curves measured with a STS304 gear without phase transformations using an oil bath with an agitator in a real heat treatment factory. The FEM simulation was successfully conducted using the aforementioned material properties and HTC, and then the predicted results were well verified with experimental data, such as the cooling rate, microstructure, hardness profile and distortion.
Keywords
Carburizing; Quenching; Computational simulation; Heat treatment; Finite element method; Heat transfer coefficient; Distortion; Microstructure;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 A. Min-Ju, A. In-Hyo, Z. Qi and L. Sung-Ki : J. Korean Soc. Manuf. Process Eng., 10 (2011) 84-89.
2 M. J. Ahn, Z. Z. Xu and S. K. Lyu: The Korean Soc. Manuf. Process Eng., 6 (2011) 74-75.
3 M. F. Yan : Mater. Chem. and Phys., 70 (2001) 242-244.   DOI
4 H. S. Lee and B. S. Lim : Transactions of KSAE, 11 (1996) 19-24.
5 G. Krauss : Steels heat treatment and processing principles, 2nd ed, ASM International Ohio (1990) 497.
6 M. M. Shea : J. Heat. Treat., 1 (1980) 29-36.   DOI
7 C. Bahnsen, B. Clausen, F. Hoffmann and H. W. Zoch : Mater. Sci. Eng. Tech., 37 (2006) 58-62.
8 P. Stolar, H. Altena, P. Jurci, F. Klima and O. Honzik : Proceedings of the 8th Seminar of the IFHTSE (2001) 95-102.
9 A. D. da Silva, T. A. Pedrosa, J. L. Gonzalez-Mendez, X. Jiang, P. R. Cetlin and T. Altan : Mater. Design, 42 (2012) 55-61.   DOI
10 M. Eshraghi-Kakhki, A. Kermanpur and M. Golozar : Mater. Sci. Tech., 28 (2012) 197-204.   DOI
11 N. -K. Kim and K. -Y. Bae : Int. J. Precis. Eng. Man., 16 (2015) 73-79.   DOI
12 R. Hardin and C. Beckermann : Simulation of Heat Treatment Distortion, 59th Technical and Operating Conference, 3.3 (2005) 1-32.
13 DEFORM-HT3, Columbus, Ohio, USA (2014).
14 D. Deng and S. Kiyoshima : Computational Materials Science, 50 (2010) 612-621.   DOI
15 JMatPro(R) ver8.0, http://www.sentesoftware.co.uk/about-us.aspx (2014).
16 M. F. Rothman : High-temperature property data: ferrous alloys, 1st ed, ASM international Ohio (1987) 3.5-3.8.
17 H. Bhadeshia and R. Honeycombe : Steels: microstructure and properties: microstructure and properties, 3rd ed, Elsevier Amsterdam (2011) 11-12.
18 F. Cverna : ASM Ready Reference Thermal Properties of Metals, 1st ed, ASM International Ohio (2002) 228-229.
19 G. F. Vander Voort : Atlas of time-temperature diagrams for irons and steels, 1st ed, ASM international Ohio (1991) 34.
20 S. Hashmi : Comprehensive Materials Processing, 1st ed, Elsevier Amsterdam (2014) 195.