Characteristics of changes in properties and structure of X10CrMoVNb9-1 steel due to long-term impact of temperature and stress

• Autorzy: Zieliński A. , Dobrzański J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: this article presents the results of mechanical and structure testing of X10CrMoVNb9-1 (P91) steel in initial state and after annealing, creep tests and long-term service under creep conditions Design/methodology/approach: The material for investigations was X10CrMoVNb9-1 (P91) steel in the form of two test pieces of tubes with dimensions of Ø355.6x50 mm and Ø325x38 mm in initial state and after 90,000 h service under creep conditions, respectively. The mechanical and structure testing was carried out on material in initial state and after long-term service under creep conditions. The microstructure was observed using scanning electron microscope. Findings: The mechanical, creep and structure testing of steel in initial state has confirmed that the tested steel meets the requirements of PN-EN 10216-2. Long-term annealing as well as hardness and impact strength testing have allowed the influence of long-term impact of temperature and time on properties and structure of X10CrMoVNb9-1 (P91) steel to be evaluated. Practical implications: The presented method can be used for evaluation and qualification of structural changes in power station boiler components operating under creep conditions. Originality/value: The presented results of changes in mechanical properties, structure and precipitation processes are applied to evaluation of the condition of elements for further industrial service.

Słowa kluczowe

EN

mechanical properties; creep test; structure; degradation after annealing; hardness; impact strength; X10CrMoVNb9-1 (P91) steel

PL

właściwości mechaniczne; próba pełzania; struktura; twardość; udarność; stal X10CrMoVNb9-1 (P91)

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2013
• Tom: Vol. 60, nr 2
• Strony: 72--81
• Opis fizyczny: Biblogr. 21 poz.

Twórcy

autor

Zieliński A.

• Institute for Ferrous Metallurgy, ul. K. Miarki 12, 44-100 Gliwice, Poland

autor

Dobrzański J.

• Institute for Ferrous Metallurgy, ul. K. Miarki 12, 44-100 Gliwice, Poland

Bibliografia

• [1] A. Hernas, Materials and technologies for construction of supercritical boilers and waste incinerators, Joint Publication, Katowice, 2009.
• [2] J. Dobrzański, A. Zieliński, A. Hernas, Structure and properties of new ferritic-based creep-resisting steels, Materials and technologies for construction of supercritical boilers and waste incinerators, Publishing House SITPH, Katowice, 2009, 47-101
• [3] PN-EN 10216-2, Seamless steel tubes for pressure purposes. Technical delivery conditions, Part 2, Non-alloy and alloy steel tubes with specified elevated temperature properties, 2009.
• [4] G. Golański, Evolution of Secondary Phases in GX12CrMoVNbN9-1 Cast Steel after Heat Treatment, Archives of Materials Science and Engineering 48/1 (2011) 12-18.
• [5] G. Golański, Mechanical properties of GX12CrMoVNbN9-1(GP91) cast steel after different heat treatment, Materials Science 48/3 (2012) 384-391.
• [6] G. Golański, J. Kępa, Role of complex nitride Cr(V, Nb)N - Z phases in high-chromium martensitic steels, Materials Science 32 6 (2011) 917-922.
• [7] A. Zieliński, J. Dobrzański, Material properties and structure of thick-walled elements made of steel 7CrMoVTiB10-10 after long-term annealing, Archives of Materials Science and Engineering 58/1 (2012) 5-12.
• [8] J. Dobrzański, A. Zieliński, M. Sroka, The influence of simultaneous impact of temperature and time on the properties and structure of X10CrWMoVNb9-2 steel, Journal of Archives in Materials and Manufacturing Engineering 34/1 (2009) 7-14.
• [9] Data Package for NF616 Ferritic steel (Cr-0.5Mo-1.8W-Nb-V), Nippon Steel Corporation, 1993.
• [10] F. Abe, M.T. Horiuchi, M. Taneike, K. Sawada, Stabilization of martensitic microstructure in advanced 9Cr steel during creep at high temperature, Materials Science and Engineering A 378 (2004) 299.
• [11] H. Semba, F. Abe, Alloy design and creep strength of advanced 9%Cr USC boiler steels containing high boron, Proceeding of the 8th International Conference. on Materials for Advanced Power Engineering, Liege, 2006, 1041-1052.
• [12] V. Sklenicka, K. Kucharova, M. Svoboda, L. Kloc, J. Kudrman, Effect of nonsteady loading on creep behaviour of advanced 9-12% fossil power plant steel, Proceeding of the 8th International Conference on Materials for Advanced Power Engineering, Liege, 2006, 1127-1136.
• [13] A. Zielińska-Lipiec, The analysis of microstructural stability of modified martensitic deformation, Publishing House AGH, Cracow, 2005.
• [14] Zieliński, Structure and properties of 9% Cr steel after creep testing, XXX School of Materials Science and Engineering, Ustroń, 2002, 99-104
• [15] J. Dobrzański, M. Sroka, A. Zieliński, Methodology of classification of internal damage the steels during creep service, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 263-266.
• [16] G. Golański, K. Prusik, P. Wieczorek, Analysis of changes in T91 steel microstructure after long-lasting exploitation, Energetic 18 (2008) 55-56 (in Polish).
• [17] J. Dobrzański, A. Zieliński, A. Maciosowski, Characteristics of changes in structure and mechanical properties of news steel for power plants (2.5-12% Cr), Report Institute of Ferrous Metallurgy nr S0-0438/2003, 2003 (unpublished).
• [18] B.J. Kim, B.S. Lim, Relationship between creep rupture life and microstructure of aged P92 steel, Experimental analysis of nano and engineering materials and structures, Proceedings of the 13th International Conference on Experimental Mechanics, Alexandroupolis, 2007, 269-270.
• [19] A. Zieliński, J. Dobrzański, H. Krztoń, Structural changes in low alloy cast steel Cr-Mo-V after long time creep service, Journal of Achievements in Materials and Manufacturing Engineering 25/1 (2007) 33-36.
• [20] NIMS Creep date sheet No 43, Data Sheets on the elevated temperature properties of 9Cr-1Mo-V-Nb steel for power boilers, (ASME SA-213/SA-213M Grade T91), 1996.
• [21] C. Chovet, E. Galand, G. Ehrhart, E. Baune, B. Leduey, Welding consumables for grade P92 steel for power generation applications, Safety and reliability of welded components in energy and processing industry, Proceedings of the IIW International Conference, Graz, 2008, 443-448.