Abstract
Due to their enhanced mechanical properties, gas carbonitrided steel components containing martensite and nitrogen stabilized austenite are currently widely used for highly loaded and severe application conditions. Carbon and nitrogen (C–N) concentration profiles developed during the gas carbonitriding have significant effect on the final properties of the steel. To achieve consistent properties and increase the reliability of processes, simulation of the C–N profile and evolving precipitates during the carbonitriding is essential. Generally, it is observed that the surface nitrogen content developed in the low-alloyed bearing-grade steels is much higher compared to the nitrogen potential in the furnace atmosphere during gas carbonitriding. The formation of nitrides/carbonitrides is one of main reasons for this difference. Thus, diffusion equations cannot be directly applied to calculate the C–N profile, as they do not include precipitation. To solve this problem, a mathematical approach is developed in this work. Thermodynamic data from MatCalc and experimental data are used to formulate equations to calculate the precipitated fraction of C–N during carbonitriding. Furthermore, these equations are integrated with diffusion equations to predict C–N profile that includes precipitates and the developed model is validated with experiments.
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References
Dossett J, Steel Heat Treating Fundamentals and Processes, ASM Handbook (2013) 4A, P 599-614.
Steinbacher M,Hoffmann F, Zoch H W, Lombardo s and Tobie.T, 2015 HTM J Heat Treatm 70, (in German)
Steinbacher M, Skalecki G M, Saddei P, Böcker M and Zoch H, HTM J Heat Treatm Mat 4 (2017) 6, (in German).
Murakami Y, 2003 NSK Technical Journal Motion and Control 15
Trojahn W and Dinkel M, Internal Reports Schaeffler (2010–2015)
Chikara O, 2010 NTN Technical review 78
Rösch S, Trojahn W and Clausen B, HTM J Heat Treatm Mat 1 (2016) 71, (in German).
Slycke J, Kerrigan A and Holm T, 2000 Proceedings of the 5th ASM Heat Treatment and Surface Engineering Conference, Göteborg, Sweden
Lombardo S,Tobie T, Stahl K, Steinbacher M and Hoffmann F, HTM J Heat Treatm Mat 5 (2015) 70, (in German)
Yamagata H, The Science and Technology of Materials in Automotive Engines, Woodhead publishing limited (2005),p 141-206.
Hoja S, Skalecki M G und Westkamp K H, HTM J Heat Treatm Mat 4 (2017) 72, (in German).
Bischoff S, Westkamp K H and Hoffmann F, HTM J Heat Treatm Mat 3 (2010) 65, (in German).
Chatterjee F R and Schaaber O, HTM J Heat Treatm Mat 2 (1971) 26, (in German).
Winter K M, J Mater Eng Perform 7 (2013) 22.
Gupta G S, Chaudhuri A and Vasanth K, Mat Sci Tech 10 (2002) 18.
Karabelchtchikova O and Sisson R D, J Phase Equilib Diff 6 (2006) 27.
Slycke J and Ericsson T, J Heat Treat 2 (1981) 2.
He L, Xu Y and Sisson R D, Mat Perform Charact 1 (2012) 1.
Skalecki M, 2019 Simulation und praktische Anwendung des geregelten Carbonitrierens von niedriglegierten Stählen, Phd Thesis, University of Bremen, Germany (in German).
Steinbacher M, 2012 Thermogravimetrische Messungen beim Niederdruckaufkohlen als Grundlage für Simulationen, Phd Thesis, University of Bremen, Germany, (in German).
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Soni, A., Trojahn, W., Dinkel, M. et al. Enhanced Performance of Automotive and Industry Precision Components by Advanced Carbonitriding Technology. Trans Indian Inst Met 74, 1231–1239 (2021). https://doi.org/10.1007/s12666-020-02183-5
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DOI: https://doi.org/10.1007/s12666-020-02183-5