Effects of Solution Temperature on Microstructure and Tensile Properties of Casting Duplex Stainless Steel

Abstract:

In this paper, effects of solid solution treatment temperature on microstructure and tensile properties of casting SAF 2507 super duplex stainless steel were researched by means of optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and tensile test. The results indicate that the amount of γ phase increases according to a linear relationship f(g ) = -0.134T +159.94 during the temperatures from 1100°C to 1250°C. Tensile properties of casting SAF 2507 super duplex stainless steel fluctuate with solution temperature change. Austenitic grain size and morphology are the most important factors on tensile property. The tensile strength is the highest owing to the finest austenitic grain at the solution temperature of 1150°C. The elongation is related to the fracture mode. At 1100 , elongation ration is highest because of the ductile fracture.

• Periodical: Advanced Materials Research (Volumes 146-147)
• Pages: 818-824
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.146-147.818
• Online since: October 2010
• Authors: Hong Liang Xiang, Dong Liu, Fu Shan He
• Keywords: Cast Super Duplex Stainless Steel, Microstructure, Solid Solution, Tensile Properties

References

[1] J. Olsson and M. Snis. Desalination. Vol. 205(2007), p.104.

[2] S. S Tavares, V.F. Terra and N.P. Lima Microchimica Acta., Vol. 40(2005), p.4025.

[3] J.Y. Wang. Petrochemical Design. Vol. 23(2006) p.40 (In Chinese).

[4] Z.Z. Wu, Z.G. Song and W.J. Zheng Jinshu Rechuli/Heat Treatment of Metals. Vol. 32(2007) p.50 (In Chinese).

[5] J. Wu. Duplex stainless steel, edited by Metallurgy Industry Press(1999) (In Chinese).

[6] W.S. Hoa, P.K. Chiu and J.R. Yangl. Materials Science and Engineering. Vol. A420(2006). pp.26-33.

[7] M.P. Li, S.G. Yue and Y. Ke. Journal of Shenyang University of Technology., Vol 25(2003). pp.193-195. (In Chinese).

[8] D. Liu. Study on microstructure, property and investment casting process of cast super duplex stainless steel(MS. Fuzhou University, China. 2009) (In Chinese).

[9] J. Tong. Study on tensile property and hot deformation behavior of super duplex stainless steel(MS, Yanshan University, China, 2006) (In Chinese).

[10] D.L. Shu. Mechanical properties of engineering materials, edited by Machinery Industry Press (2003) (In Chinese).