Analysis of Cracking Phenomenon Occurring during Cold Forging of ML25Mn Steel

Abstract:

Article Preview

Cold forging has various advantages compared to other forming processing. Cracking phenomenon was taken place during cold forging of ML25Mn steel. In this study, microstructural analyses were made on the cracked regions of the steel. The reason of cracking phenomenon occurring during cold forging for ML25Mn steel was investigated based on SEM observation in detail. The results have shown that ML25Mn steel presents lower strength and toughness. A larger amount of inclusions which are composed of MnS and complex oxides containing Mg, Al, Mn, Fe, S, Ca and O are found, and the complex inclusion might be brought during the deoxidation and the solidification in smelting and casting. Non-metallic inclusions result in significant stress concentration, which cause cracking phenomenon occurring during cold forging of ML25Mn steel.

Info:

Periodical:

Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz

Pages:

643-646

DOI:

10.4028/www.scientific.net/KEM.324-325.643

Citation:

Z. Li et al., "Analysis of Cracking Phenomenon Occurring during Cold Forging of ML25Mn Steel", Key Engineering Materials, Vols. 324-325, pp. 643-646, 2006

Online since:

November 2006

Export:

Price:

$35.00

[1] C. MacCormack, J. Monaghan: J. Mater. Process. Technol., Vol. 117 (2001), p.209.

[2] D. K. Kim, S. Y. Kang and S. Lee: Metall. Trans. A, Vol. 30A (1999), p.81.

[3] M. Qingxian, W. Zhicheng and Z. Yuexian: J. Mater. Process. Technol., Vol. 123 (2002), p.61.

[4] R. B. Scarlin, C. Berger and K. H. Mayer: Metals and Materials, Vol. 2 (1986), p.213.

[5] K. Sachs. Steel for Cold Forging [J]. Wire Industry, Vol. 42 (1975), p.41.

[6] M. V. Beloshapko, I. P. Shmyrev and V. F. Mazanik: Metal Science and Heat Treatment, Vol. 31 (1990), p.690.

[7] M. Mantyla, A. Rossoll and I. Nedbal: Journal of Nuclear Materials, Vol. 264 (1999), p.257.

[8] M. Mantyla, A. Rossoll and I. Nedbal: Journal of Nuclear Materials, Vol. 264 (1999), p.257.

[9] I. Maekawa, J. H. Lee and H. Shibata: Key Engineering Materials, Vol. 51-52 (1991), p.31.

[10] G. Z. Wang, Y. G. Liu and J.H. Chen: Mater. Sci. and Eng. A Vol. 369 (2004), p.181.

[11] C. R. F. Azevedo, J. B. Neto: Engineering Failure Analysis. Vol. 11 (2004), p.951.

In order to see related information, you need to Login.