Microstructure Evolution and Precipitation Behavior of a High Nitrogen 15Cr Martensitic Stainless Steel during Tempering

Article Preview

Abstract:

The microstructure evolution and precipitation behavior of a low carbon high nitrogen martensitic stainless steel containing 15%Cr-5%Ni-1%Mo-0.16%N (in mass percentage) after tempering at temperatures ranged from 300 °C~700 °C were investigated by hardness test, X-ray diffraction (XRD) and Transmission electron microscopy (TEM). The steel exhibits second hardening behavior after tempering at temperatures below 500 °C. Tempering at temperatures above 500 °C promotes the formation of reversed austenite and the precipitation of Cr2N. The coherent orientation relationship of Cr2N with martensite was revealed as , . Retained austenite originated from reversed austenite at room temperature results in the softening of the steel, and the retransformation of reversed austenite to untempered martensite after tempering at temperatures above 600 °C restores the hardness of the steel. σ phase was also found in specimens tempered at temperatures ranged from 500 °C to 700 °C.

You might also be interested in these eBooks

Info:

Periodical:

Advanced Materials Research (Volumes 311-313)

Pages:

910-915

Citation:

Online since:

August 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] C.P. Linne, F. Blanchard, G.C. Guntz and B.J. Orlans-Joliet: Corrosion Vol. 97 (1997), Paper No. 28

Google Scholar

[2] D. Carrouge, H.K.D.H. Bhadeshia and P. Woollin: Sci. Technol. Weld. Joining Vol. 9 (2003), p.377

Google Scholar

[3] X. Ma, L. Wang and C. Liu: J. Mater. Metall. Vol. 8 (2009), p.168 "In Chinese"

Google Scholar

[4] D.S. Leem, Y.D. Leeb, J.H. Junc, C.S. Choi, Scripta Mater. Vol. 45 (2001), p.767

Google Scholar

[5] S. Hamano, T. Shimizu and T. Noda: Mater. Sci. Forum Vol. 539-543 (2007), p.4975

Google Scholar

[6] M.A. Dawood, I.S.E. Mahallawi, M.E. Abd, et al: Mater. Sci. Technol. Vol. 20 (2004), p.363

Google Scholar

[7] E.S. Park, D.K. Yoo, J.H. Sung, C.Y. kang, J. Lee and J.H. Sung: Met. Mater. Int. Vol. 6 (2004), p.521

Google Scholar

[8] P.D. Bilmes, M. Solari and C.L. Llorente: Mater. Charact. Vol. 46 (2001), P. 285

Google Scholar