Abstract
The Thermo-Calc software was employed to calculate the equilibrium phase of 22Cr-27Ni-2Ti-Al austenitic valve steel, and the Laves phase in this steel was investigated after solid solution and aging by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Results show that the microstructure of the experimental steel consists of γ, γ′, Laves and NbC. Laves phases mainly precipitate on grain boundaries, with granular and fibrous morphologies. The size of the granular Laves phase is about 50–600 nm, and the fibrous Laves phase is composed of short strip Laves phases which are 300–600 nm in length and 50–150 nm in width. These two morphologies of Laves phase coarsen with increasing aging temperature, and this steel possesses the highest strength and hardness at aging temperature of 760 °C.
Similar content being viewed by others
References
T. F. Andrade, A. M. Kliauga, R. L. Plaut, A. F. Padilha, Mater. Charact. 59 (2008) 503–507.
J. Shu, H. Y. Bi, X. Li, Z. Xu, Oxid. Met. 78 (2012) 253–267.
L. V. Tarasenko, A. B. Shal’kevich, Met. Sci. Heat Treat. 53 (2011) 123–126.
Y. T. Chiu, C. K. Lin, J. Power Sources 198 (2012) 149–157.
O. Prat, J. Garcia, D. Rojas, G. Indan, Intermetallics 32 (2013) 362–372.
O. Prat, J. Garcia, D. Rojas, Acta Mater. 58 (2010) 6142–6153.
S. R. Xing, L. Z. Dong, Iron and Steel 47 (2012) No. 6, 55–59.
B. Y. Yao, R. C. Zhou, C. X. Fan, J. T. Li, Proceedings of the CSEE 30 (2010) No. 8, 94–100.
Y. F. Wang, K. Y. Zheng, Z. Y. Wu, Q. J. Wang, J. Chin. Soc. Power Eng. 30 (2010) 245–252.
A. Mahmudi, S. H. Nedjad, M. M. J. Behnam, Int. J. Min. Met. Mater. 18 (2011) No. 5, 557–561.
A. Mahmoudi, M. R. Z. Ghavidel, S. H. Nedjad, A. Heidarzadeh, M. N. Ahmadabadi, Mater. Charact. 62 (2011) 976–981.
S. G. K. Manikandan, D. Sivakumar, K. Prasad Rao, M. Kamaraj, J. Mater. Process. Technol. 214 (2014) 358–364.
S. G. K. Manikandan, D. Sivakumar, M. Kamaraj, K. P. Rao, Mater. Sci. Forum 710 (2012) 614–619.
X. Xin, W. R. Sun, S. R. Guo, F. Liu, F. Qi, W. H. Zhang, H. C. Yang, Z. Q. Hu, Mater. Sci. Forum 650 (2010) 178–185.
F. Liu, W. R. Sun, S. L. Yang, Z. Li, Acta Metall. Sin. 44 (2008) No. 7, 791–798.
S. Klein, N. Nabiran, S. Weber, W. Theisen, Steel Res. Int. 85 (2013) No. 5, 851–862.
H. R. Cui, F. Sun, K. Chen, L. T. Zhang, R. C. Wan, A. D. Shan, J. S. Wu, Mater. Sci. Eng. A 527 (2010) 7505–7509.
S. Nishikawa, S. Ohkita, Y. Horii, Weld. Int. 24 (2010) No. 2, 88–95.
J. P. Shingledecker, N. D. Evans, Int. J. Pres. Ves. Pip. 87 (2010) 345–350.
K. Shen, S. C. Cheng, J. Z. Zhang, H. S. Bao, X. F. Niu, Mater. Mech. Eng. 36 (2012) No. 3, 18–21.
X. F. Niu, S. C. Cheng, Y. Zu, L. X. Li, K. Shen, Mech. Eng. 36 (2012) No. 3, 39–43.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation Item: Item Sponsored by National High-tech Research and Development Program of China (2012AA03A501)
Rights and permissions
About this article
Cite this article
Wang, Lm., Xue, Cc., Yang, G. et al. Laves Phase in 22Cr-27Ni-2Ti-Al Austenitic Valve Steel. J. Iron Steel Res. Int. 23, 1303–1308 (2016). https://doi.org/10.1016/S1006-706X(16)30192-3
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1016/S1006-706X(16)30192-3