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Effect of Carbon Potential on the Carbide Formation and Pitting Fatigue Strength of Supercarburized Steel
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 Title & Authors
Effect of Carbon Potential on the Carbide Formation and Pitting Fatigue Strength of Supercarburized Steel
So, Sangjin; Shin, Jungho; Lim, Jae-Won; Lee, Seok-Jae;
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 Abstract
In the present work, we investigated the effects of the carbon potential on the formation of carbide at the carburized surface and anti-pitting fatigue strength in the supercarburized steels. Two low carbon steels with different Cr concentrations were adopted and the repeated supercarburizing treatment carried out with the different carbon potential conditions. The microstructure and carbides at the supercarburized surface were observed by using optical microscope and scanning electron microscope. The microhardness test was performed and the hardness distribution and the effective case depth at the supercarburized surface were discussed. The roller pitting fatigue test was carried out and the fatigue strength was evaluated with different the carbon potential conditions. The microstructure of the fatigue specimen surface was observed by means of scanning electron microscope and scanning transmission electron microscope. Depending on the chemical composition of the steels and the carbon potential condition, the resistance of temper softening and pitting failure was influenced due to the carbide distribution and the formation of coarse network carbide. Thus, it was confirmed that the control of the carbide formation is a key factor to improve the anti-pitting fatigue strength in the supercarburized steels.
 Keywords
Supercarburization;Carbon potential;Carbide formation;Fitting strength;
 Language
Korean
 Cited by
 References
1.
K. Ohbayashi : Denki-Seiko, 79 (2008) 53. crossref(new window)

2.
D. Y. Kim and J. H. Jeong : Seah Besteel Research Report, 23 (2007) 49.

3.
M. Nagahama, K. Iwasaki, and S. Abe : R&D Kobe Steel Engineering Reports, 56 (2006) 53.

4.
K. Namiki, S. Sugiura, S. Umegaki, Y. Okada, and I. Tani : SAE Technical Paper Series, 890531 (1989)

5.
T. Shimomura, T. Morita, K. Inoue, and T. Hanyuda : Denki-Seiko, 77 (2006) 11.

6.
L.-D. Liu and F.-S. Chen : Surface and Coatings Technology, 183 (2004) 233. crossref(new window)

7.
S. Abe and M. Ikeda : Kobe R&D Kobe Steel Engineering Reports, 54 (2004) 21

8.
T. Kimura and S. Nakamura : Proceeding of 9th International Congress on Heat Treatment & Surface Engineering (1994) 437.

9.
S. G. Lee, S. B. Kang, B. H. Jung, and H. G. Kim : Journal of the Korean Society for Heat Treatment, 5 (1992) 195.

10.
S. J. Lee, D. K. Matlock, and C. J. Van Tyne : ISIJ International, 51 (2011) 1903. crossref(new window)

11.
J. H. Shin, W. J. Lee, Y. P. Kim, and I. Y. Ko : Korean Journal of Metals and Materials, 50 (2012) 517. crossref(new window)

12.
J. Xiao and M. Zhang : Journal of Materials Research (2016) In press.

13.
O. A. Quintana : Ph.D. dissertation, University of Illinois-Chicago (2013).

14.
Y. Watanabe, N. Narita, Y. Matsushima, and K. Iwasaki : Proceeding of 20th ASM Heat Treating Society Conference (2000) 52.

15.
J. W. Edington : Electron Diffraction in the Electron Microscope, Practical Electron Microscopy in Materials Science, Macmillan Press Ltd. (1975) 67.

16.
D. Hull and D. J. Bacon : Introduction to Dislocation, 3rd edition, Pergamon Press (1984) 175.

17.
P. G. Shewmon : Diffusion in Solids, McGraw-Hill, (1963) 23.