Effect of Solution Treatment on Microstructure and Properties of the SAF2507 Super Duplex Stainless Steel

Abstract:

Effect of solution treated temperature at 5001100°C on ferrite/austenite ratio and σ phase precipitation has been studied in this paper, and the tensile properties after solution treatment at 950°C and 1050°C is compared. The results shows that the ferrite/austenite ratio treated 1050~1100°C is about 1:1; and the formation of σ phase occurs in the ferrite or at ferrite - austenite boundary. The quantity of the σ phase precipitation increases firstly and then decreases with increase of the solution treatment temperature, reaching the maximum at 900°C, and disperse at above 1050°C. Tensile tests show that the fracture is brittle divided and stretched by ductile belt at 950°C, and ductile at 1050°C.

• Periodical: Materials Science Forum (Volume 724)
• Pages: 3-6
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.724.3
• Online since: June 2012
• Authors: Jin Ming Liu, Jie Liu, Guang Wei Fan, Dong Fang Du, Guo Ping Li, Cheng Jun Chai
• Keywords: Ferrite Austenite Ratio, SAF2507, Solution Treatment, σ-Phase

References

[1] T.H. Chen and J.R. Yang: Mater. Sci. Eng. A Vol. 338(2002), p.166.

[2] J. A . Jimenez, M. Carsi and O. A. Ruano: J Mater. Sci. Vol. 35(2000), p.907.

[3] M. Pohl, O. Storz and T. Glogowski: Mater. Charact., Vol. 58(2007), p.65.

[4] Y. S. Ahn and J. P. Kang. Mater. Sci. Technol., Vol. 16(2000), p.383.

[5] H. Sieurin and R. Sandstrom: Mater. Sci. Eng. A, Vol. 444(2007), p.271.

[6] D.P. Ding, X. Liu and Y.L. He: Iron and Steel, Vol. 45(2010), p.86.