The Mössbauer spectroscopy studies of ε to cementite carbides transformation during tempering of high carbon tool steel

• Autorzy: Bała P. , Krawczyk J. , Hanc A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This work presents results of investigations using Mössbauer spectroscopy technique and their interpretation concerning transformation of ε to cementite carbides during tempering in relation to previously conducted dilatometric, microscopic and mechanical investigations. Investigations were performed on 120MnCrMoV8-6-4-2 steel. Design/methodology/approach: Samples taken from investigated steel were austenitized at the temperature of 900°C and hardened in oil. Austenitizing time was 20 minutes. After that, seven of eight samples were tempered. Tempering consisted of holding the samples at 200°C for defined periods. All the times mentioned above were selected basing on IHT (Isothermal Heating Transformations) diagram. Findings: The influence of the tempering time on nucleation and solubility of ε carbides, and on cementite nucleation and growth, was determined. Research limitations/implications: The analysis of phase transformations during various periods of tempering using Mössbauer spectroscopy technique made possible to reveal fine details connected with the processes. Practical implications: Optimum tempering time of tools made from the investigated steel should be in the range of 1.5-2h. Originality/value: Details descriptions of ε to cementite carbides transformation during isothermal heating from as-quenched state.

Słowa kluczowe

EN

Mössbauer spectroscopy; CEMS; steel; tempering; iron carbide

PL

spektroskopia Mössbauera; CEMS; stal; odpuszczanie; węglik żelaza

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 32, nr 2
• Strony: 95--98
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Bała P.

autor

Krawczyk J.

autor

Hanc A.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, ul. Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

• [1] R.W.K. Honeycombe, H.K.D.H. Bhadeshia, Steels. Micro-structure and properties, Second Edition, Edward Arnold, London, 1995.
• [2] A.K. Sinha, Physical metallurgy handbook, The McGraw-Hill, New York, 2003.
• [3] M. Blicharski, Steels, WNT, Warsaw, 2004 (in Polish).
• [4] P. Bała, The kinetics of phase transformations during tempering and its influence on the mechanical properties, PhD thesis, AGH University of Science and Technology, Cracow, 2007 (in Polish).
• [5] P. Bała, J. Pacyna, J. Krawczyk, The kinetics of phase transformations during the tempering of HS18-0-1 high-speed steel, Journal of Achievements in Materials and Manufacturing Engineering 19/1 (2006) 19-25.
• [6] P. Bała, J. Pacyna, J. Krawczyk, The kinetics of phase transformations during the tempering of HS6-5-2 high-speed steel, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 47-50.
• [7] P. Bała, J. Pacyna, The kinetics of phase transformations during tempering in high-speed steels, Journal of Achievements in Materials and Manufacturing Engineering 23/2 (2007) 15-18.
• [8] L.A. Dobrzański, W. Kasprzak, J. Mazurkiewicz, The structure and properties W-Mo-V-Co high-speed steel of the type 11-2-2-5 after heat treatment, Proceedings of the 4thInternational Scientific Conference "Achievements in Mechanical and Materials Engineering" AMME'95, Gliwice-Wisła, 1995, 83-86 (in Polish).
• [9] L.A. Dobrzański, A. Zarychta, The structure and properties of W-Mo-V high-speed steels with increased contents of Si and Nb after heat treatment, Journal of Materials Processing Technology 77 (1998) 180-193.
• [10] J. Pacyna, P. Bała, T. Skrzypek, The kinetic of phase transformation during continuous heating from quenched state of new high-carbon alloy steel, Proceedings of the 13thInternational Scientific Conference "Achievements in Mechanical and Materials Engineering" AMME'2005, Gliwice-Wisła, 2005, 512-515.
• [11] D.E. Kaputkin, Reversible martensitic transformation, ageing and low-temperature tempering of iron-carbon martensite, Materials Science and Engineering A438-440 (2006) 207-211.
• [12] R. Padmanabhan, W.E. Wood, Precipitation of ε carbide in martensite, Materials Science and Engineering 65 1984 289-297.
• [13] K.A. Taylor, G.B. Olson, M. Cohen, J.B. Vander Sande, Carbide precipitation during stage I tempering of Fe-Ni-C martensites, Metallurgical Transactions A20/12 1989 2749-2766.
• [14] S. Murphy, J.A. Whiteman, The precipitation of epsilon-carbide in twinned martensite, Metallurgical Transactions 1 (1970) 843-848.
• [15] J. Krawczyk, P. Bała, J. Frąckowiak, The Mössbauer spectroscopy studies of retained austenite, Archives of Materials Science and Engineering 28/10 (2007) 633-636.
• [16] V.A. Shabashov, L.G. Korshunov, A.G. Mukoseev, V.V. Sagaradze, A.V. Makarov, V.P. Pilyugin, S.I. Novikov, N.F. Vildanova, Deformation-induced phase transitions in a high-carbon steel, Materials Science and Engineering A346 (2003) 196-207.