Influence of heat treatment on microstructure and properties of GX12CrMoVNbN9-1 cast steel

• Autorzy: Golański G.
• Języki publikacji: EN

Abstrakty

EN

The paper presents results of research on the influence of multistage heat treatment on microstructure and properties of high-chromium martensitic GX12CrMoVNbN9 – 1 (GP91) steel. The material under investigation were samples taken out from a test coupon. Heat treatment of GP91 cast steel was performed at the parameters of temperature and time typical of treatment for multi-ton steel casts. The research has proved that in the as-received condition (as-cast state) GP91 cast steel was characterized by a coarse grain, martensitic microstructure which provided the required standard mechanical properties. The heat treatment of GP91 cast steel contributed to obtainment of a fine grain microstructure of high tempered martensite with numerous precipitations of carbides of diverse size. The GP91 cast steel structure received through heat treatment made it possible to obtain high plastic properties, particularly impact strength, maintaining strength properties on the level of the required minimum.

Słowa kluczowe

EN

heat treatment; mechanical properties; high-chromium cast steel; martensitic cast steel

PL

obróbka cieplna; właściwości mechaniczne; staliwo wysokochromowe; staliwo martenzytyczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 3
• Strony: 89--94
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Golański G.

• Czestochowa University of Technology, Institute of Materials Engineering, Armii Krajowej 19, 42 – 200 Częstochowa, Polska

Bibliografia

• [1] S. Caminada, L. Cipolla, G. Cumino, A. Di Gianfrancesco, Y. Minami, T. Ono, Ferritic and austenitic grade steel for new generation of steam power plants, 5th International Conference “Advances in Materials Technology for Fossil Power Plants”, Marco Island, Florida, 2007, 564 – 581.
• [2] Zielińska–Lipiec, The analysis of a microstructural stability of modified martensitic 9%Cr steels during annealing and creep deformation, AGH Publ., Cracow, 2005.
• [3] G. Golański, S. Stachura, Characterization of new low alloy steels for power plant, Hutnik – wiadomości hutnicze, 2009, 679 – 683 (in Polish).
• [4] K. H. Mayer, H. Cerjak, P. Hofer, E. Letofsky, F. Schuster, Evolution of microstructure and properties of 10% Cr steel castings, Microstructural development and stability in high chromium ferritic power plant steels, Edited by A. Strang and D. J. Gooch, The Institute of Materials, London, 1997, 105 –122.
• [5] R. Hanus, Advanced 9 – 12%Cr cast steel grades, research – foundry process development – quality – experience, 4th International Conference “Advances in Materials Technology for Fossil Power Plants”, Hilton Head Island, South Carolina, 2004, 638 – 651.
• [6] S. C. Bose, K. Singh, A. K. Ray, R. N. Ghosh, Effect of thermal ageing on mechanical properties and microstructure of a standard G-X12CrMoVWNbN1011 grade of cast steel for turbine casing, Mater. Sc. Eng. A,476, 2008, 257 – 266.
• [7] Bakalarski, A. Nowarski, J. Sus, K. Wyszyński, Badania teoretyczne i doświadczalne zastosowania wodnych roztworów polimerowych do hartowania staliwa niskostopowego, Przegląd Odlewnictwa, 51, 2001, 2, 61 - 64 (in Polish).
• [8] J. Łukowski Nowoczesne instalacje hartownicze z zastosowaniem roztworów polimerowych, Przegląd Odlewnictwa, 51, 2001, 2, 57 - 60 (in Polish).
• [9] Materiały reklamowe firmy Alstom.
• [10] J. P. Naylor, R. Blondeau, The respective roles of the packet size and the lath width on toughness, Metall. Trans., 7A, 1976, 891 – 893.
• [11] J. Janovec, M. Svoboda, J. Blach, Evolution of secondary phases 12% Cr steel during quenching and tempering, Mater. Sc. Eng. A, 249, 1998, 184 – 189.