Precipitation of Laves phase Fe2Mo type in HSLA steel with copper addition and high content of molybdenum

• Autorzy: Bogucki R. , Miernik K. , Pytel S.
• Języki publikacji: EN

Abstrakty

EN

The results of mechanical properties and microstructure of low-carbon copper bearing steel after quenching and tempering at temperature range of processing precipitation of particles rich in copper and particles intermetallic phase are presented in this paper. When content molybdenum increases in tempering temperature range from 550°C to 600°C that decrease of the impact energy measured at room temperature was observed. Microstructure analysis was conducted by transmission electron microscope (TEM) and was disclosed the occurrence of Fe2Mo Laves phase on crystallites boundaries of retained austenite. Observed sudden drop of ductility in higher-molybdenum content steels (1,88 % and 2,94 %) should be connected with occurrence precipitation processes of the hard and brittle Laves phase in range of discussion tempering temperatures.

Słowa kluczowe

EN

heat treatment; impact strength; HSLA; Laves phase

PL

obróbka cieplna; siła uderzenia; HSLA; faza Lavesa

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 3 spec.
• Strony: 213--218
• Opis fizyczny: Bibliogr. 11 poz., il., tab., wykr.

Twórcy

autor

Bogucki R.

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

autor

Miernik K.

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

autor

Pytel S.

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

Bibliografia

• [1] MIL-S-24645A(SH), Military Specyfication, Steel Plate, Sheet, or Coil, Age-Hardening Alloy, Structural, High Yield Strength (HSLA-80 and HSLA 100), January 1991.
• [2] M. Blicharski, C. I. Garcia, S. M. Pytel: Structure and Properties of ULCB Steels for Heavy Section Applications, Proceedings of International Symposium on Processing, Microstructure and Properties of HSLA Steels, October 1987, Pittsburgh, PA, USA.
• [3] S. J. Mikalac and M. G. Vassilaros: Strength and toughness response to aging in a high copper HSLA-100 steel – Proceeding of the International Conference on Processing, Microstructure and Properties of Microalloyed and other Modern High Strength Low Alloy Steels, June 3-6 1991, Pittsburgh, Pa, USA, pp. 331-343.
• [4] A. Ghosh, S. Chatterjee: Characterization of precipitates in an ultra low carbon Cu bearing high strength steel: A TEM study, Materials Characterization 55 (2005) 298– 306.
• [5] A. Ghosh, S. Chatterjee: Ageing behavior of a Cu-bearing ultrahigh strength steel; Materials Science and Engineering A 486 (2008) 152–157.
• [6] S.K. Ghosh, A. Haldar, P.P. Chattopadhyay: Effect of ageing on the mechanical properties of directly quenched copper bearing microalloyed steels; Materials Chemistry and Physics 119 (2010) 436–441.
• [7] W.B. Lee, S.G. Honh, C.G. Park, K.H. Kim, S.H. Park: Influence of Mo on precipitation hardening in hot rolled HSLA steels containing Nb; Scripta mater. 43 (2000), 319-324.
• [8] A. K. Lis, P. Wieczorek: TEM study of the precipitation process in HSLA-100 copper bearing steel, Inżynieria Materiałowa nr 3(140), XXIV 2005.
• [9] M. Zinkevich, N. Mattern: Thermodynamic modeling of the Fe-Mo-Zr system, Acta Materialia Vol. 50, 2002, p. 3373-3383.
• [10] R. Rožnovskă, V. Vodărek, A. Korčăk, M. Tvrdŷ: The effect of heat treatment on microstructure and properties of a 13Cr6Ni2,5Mo supermartensitic steel, Rada Hutnika Vol. 1, 2005, p. 1241.
• [11] E. H. Lee, L. K Mansur: Fe-15Ni-13Cr austenitic stainless steels for fission and fusion reactor applications. II. Effects of minor elements on precipitate phase stability during thermal aging, Journal of Nuclear materials 278 (2000), 11-19.