Effect of Intercritical Annealing on Structure and Mechanical Properties of 10GN2MFA Grade Steel

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The effect of intercritical annealing of 10GN2MFA grade steel on mechanical properties and impact notch toughness is studied in this paper. This type of low alloy banitic steel is used for production of collector bodies of steam generators for nuclear power station of VVER type. This article is focused on optimalization of fundamental utility properties and heat treatment process of the steel under investigation to increase toughness and critical temperature of brittleness. An intecritical annealing has been chosen as a useful tool for such improvement. Mechanical properties and impact notch toughness values after the intercritical annealing and conventional heat treatment regimes are compared. Effect of simulation of stress relieving including minimum and maximum allowable heating regimes are studied too. Intercritical annealing was added to the conventional quality heat treatment process, between quenching (normalizing) and tempering. The application of intercritical annealing improved the impact toughness significantly, an increase in the upper shelf energy and a decrease in transition temperature of steel under investigation.

Info:

Periodical:

Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera

Pages:

377-380

Citation:

L. Kander et al., "Effect of Intercritical Annealing on Structure and Mechanical Properties of 10GN2MFA Grade Steel", Materials Science Forum, Vols. 567-568, pp. 377-380, 2008

Online since:

December 2007

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$38.00

[1] Korcak,A., Matocha,K., Kander,L.: Кollektory teplonositela PG - izgotovlenie i poverka na stoikost protiv korozionnogo raztreskivania, Vitkovice - Heavy Machinery a. s., (internal).

[2] A. Schwedler: Einfluβ der Wärmebehandlung im Bereich der Ac1/Ac3-Temperatur auf das Gefüge und Eigenschaften niedriglegierter Baustähle, Stahl und Eisen, 99, V 10, 1979, 22-34.

[3] B. -J. Lee, H. -D. Kim, J. -H. Hong: Calculation of α/γ equilibria in SA 508 Grade 3 Steels for intercritical heat Treatment, Metall. And Mater. Trans. A, 29A, May 1998, 1441-1447.

[4] H. -D. Kim, Y. -S. Ahn, Y. -J. Oh, G. -M. Kim, J. -H. Hong: Effect of intercritical annealing on toughness and strength of SA 508 Gr. 3 heavy section forging steel, 13th Int. Forgemaster Meeting, Advances in Heavy Forgings, October 12-16, 1997, Pusan, Korea, Vol. II, Sesion 5, 197-208.

[5] Kander,L. a kol.: Effect of intercritical annealing on properties of 10GN2MFA grade steel used for nuclear power station. In Proc. 21. dny tepelneho zpracovani, Jihlava 2006, p.193.

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