Kinetics of the σ Phase Precipitation in Respect of Erosion-corrosion Wear of Duplex Cast Steel

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The examined material comprised two grades of corrosion-resistant cast steel, namely GX2CrNiMoN25-6-3 and GX2CrNiMoCuN25-6-3- 3, used for example in elements of systems of wet flue gas desulphurisation in power industry. The operating conditions in media heated up to 70°C and containing Cl' and SO4 ions and solid particles produce high erosive and corrosive wear.The work proposes an application of the σ phase as a component of precipitation strengthening mechanism in order to increase the functional properties of the material. The paper presents the results of examination of the kinetics of σ phase precipitation at a temperature of 800°C and at times ranging from 30 to 180 minutes. Changes in the morphology of precipitates of the σ phase were determined using the value of shape factor R. Resistance to erosion-corrosion wear of duplex cast steel was correlated with the kinetics of sigma phase precipitating.

[1] Voronenko, B. I. (1997). Austenitic-ferritic stainless steels. Metal Science and Heat Treatment. 39(9-10), 20-29.

[2] Pohl, M., Storz, O. & Glogowski, T. (2007). Effect of intermetallic precipitations on the properties of duplex stainless steel. Materials Characterization. 58, 65-71.

[3] Sieurin, H. & Sandstrom, R. (2007). Sigma phase precipitation in duplex stainless steel 2205. Materials Science and Engineering A. 444, 271-276.

[4] Kwok, C. T., Man, H. C. &Leung, L. K. (1997). Effect of temperature, pH and sulphide on the cavitation erosion behaviour of super duplex stainless steel. Wear. 211, 84-93.

[5] Stradomski, Z., Brodziak-Hyska, A. & Kolan, C. (2012). Optimization of sigma phase precipitates with respect to the functional properties of duplex cast steel. Archives of Foundry Engineering. 12(2), 75-78.

[6] Stradomski, Z. & Brodziak, A. (2010). Assessment the possibility of enhancing the tribological properties of the ferritic-austenitic cast steel. Archives of Foundry Engineering. 10(1), 287-290.

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

Journal Information

CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316


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