Microstructure and Mechanical Properties of CrMoV Steel after Long-Term Service

• Autorzy: Golański G. , Pietryka I. , Słania J. , Mroziński S. , Jasak J.

Identyfikatory

DOI

10.1515/amm-2016-0014

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of research on the microstructure and mechanical properties of 12HMF steel after longterm service. The investigated material was taken from a pipeline with circumferential welded joint after 419 988 hours of service at the temperature of 490°C, steam pressure 8 MPa. Performed research has shown that the 12HMF steel after service was characterized by a typical microstructure for this grade of steel, that is a ferritic-bainitic microstructure without any visible advanced processes of its degradation. The investigation of mechanical properties has shown that the examined steel after service was characterized by a very low impact energy KV, and yield strength lower than the required minimum. Whilst tensile strength and yield strength determined at elevated temperature was higher and similar to the standard requirements, respectively. It has been proved that the main cause of an increase in brittleness and a decrease in yield strength of the examined steel should be seen in the segregation of phosphorus to grain boundaries and the formation of precipitate free zones near the boundaries.

Słowa kluczowe

EN

microstructure; mechanical properties; long-term service

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 1
• Strony: 51--54
• Opis fizyczny: Bibliogr. 28 poz., rys., tab.

Twórcy

autor

Golański G.

• Institute of Materials Engineering, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Pietryka I.

• Institute of Materials Engineering, Cracow University of Technology, Jana Pawła II 37, 31-864 Kraków, Poland

autor

Słania J.

• Department of Welding Technology, Institute of Mechanical Technologies, Częstochowa University of Technology,Armii Krajowej 19c, 42-200 Częstochowa, Poland

autor

Mroziński S.

• Faculty of Mechanical Engineering, University ofTechnology and Life Sc iences in Bydgoszcz, Kaliskiego 7, 85-791 Bygdoszcz,Poland

autor

Jasak J.

• Institute of Materials Engineering, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] A. Zieliński, J. Dobrzański, J. Wodzyński, Prace IMZ 1, 42 (2010).
• [2] S. Stachura, Energetyka 2, 109 (1999).
• [3] A. Jasiński, Energetyka 3, 551 (2013).
• [4] J. Dobrzański, A. Zieliński, H. Paszkowska, Prace IMŻ 1, 9 (2009).
• [5] PN-75/H-84024 Steels for elevated temperatures service. Grades.
• [6] PN-EN ISO 643:2012 Steels - Micrographic determination of the apparent grain size.
• [7] J. Janovec, A. Vyrostkova, M. Svoboda, Metall. Mater. Trans. 25A, 267 (1994).
• [8] A. Vyrostkova, A. Kroupa, J. Janovec, M. Svoboda, Acta Mater. 46, 31 (1998).
• [9] R. D. Fu, T. S. Wang, W. H. Zhou, W. H. Zhangc, F.C. Zhang, Mater. Character. 58, 968 (2007).
• [10] Y. Zhang, H. Han, L. Miao, H. Zhang, J. Fi, Mater. Trans. 50A, 2507 (2009).
• [11] G. D. Pigrova, Metall. Mater. Trans. 27A, 498 (1996).
• [12] B. A. Senior, Mater. Sc. Eng., 103A, 263 (1988).
• [13] G. Golański, P. Wieczorek, Arch. Found. Eng. 9, 97 (2009).
• [14] J. Dobrzański: Materials science interpretation of the life of steels for power plants, Open Access Library, Gliwice 2011.
• [15] A. Joarder, D.S. Sarma, N.S. Cheruvu, Metall. Trans. 22A, 1811 (1991).
• [16] T. D. Nguyen, K. Sawada, H. Kushima, M. Tabuchi, K. Kimura, Mater. Sc. Eng. 591A, 130 (2014).
• [17] R. M. Horn, R. O. Ritchie, Metall. Trans. 9A, 1039 (1978).
• [18] Z. Qu, K. H. Kuo, Metall. Trans. 12A, 1333 (1981).
• [19] S. Stachura. Z. Stradomski, G. Golański, Hutnik - Wiadomości Hutnicze 5, 184 (2001).
• [20] G. Golański, Arch. Found. Eng. 9, 91 (2009).
• [21] H. Erhart, H. J. Grabke, Metal Sc. 15, 401 (1981).
• [22] M.A. Islam, M. Novovic, P. Bowen, J.F. Knott, J. Mater. Eng. Perform. 12, 244 (2003).
• [23] J. Janovec: Nature of alloy steel intergranular embrittlement, Veda Publ., Bratislava, 1999.
• [24] F. Abe, K. Asano, A. Fujiwara, Metall. Trans. 4, 1499 (1973).
• [25] A. John, E. Wert, R. Parker, V. F. Zackay, Metall. Trans. 10A, 1313 (1979).
• [26] K. Thorsten, B. Dietmar, N. Eckhard, Sc. Mater. 48, 1189 (2003).
• [27] T. Węgrzyn, J. Piwnik, Arch. Metall. Mater. 2, 539 (2012).
• [28] A. Zieliński, J. Dobrzański, H. Krztoń, J. Achiev. Mater. Manuf. Eng. 25, 33 (2007).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę