Electron microscopy investigation of the Cr-Mo-V cast steel

• Autorzy: Golański G. , Wieczorek P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Investigation of low alloy Cr–Mo–V cast steel after long – term operation and regenerative heat treatment. Design/methodology/approach: Micro structural investigations were carried out using transmission electron microscopy. Findings: The microstructure and carbide types after long – term operation and after regenerative heat treatment (including bainitic hardening with high tempering temperature) of Cr–Mo–V cast steel have been presented. Practical implications: : has been shown here is the influence of long term operation and regenerative heat treatment on the structure of Cr–Mo–V cast steel. Originality/value: The paper presents influence of regenerative heat treatment – bainitic hardening with tempering – on the structure of G21CrMoV4 – 6 (L21HMF) cast steel after long - term operation.

Słowa kluczowe

EN

metallic alloys; electron microscopy; microstructure

PL

stopy metaliczne; mikroskopia elektronowa; mikrostruktura

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 30, nr 2
• Strony: 73--76
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Golański G.

autor

Wieczorek P.

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

Bibliografia

• [1] D. Renowicz, A. Hernas, M. Cieśla, K. Mutwil, Degradation of the cast steel parts working in power plant pipelines, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 219-222.
• [2] A. Zieliński, J. Dobrzański, H. Krztoń, Structural changes In low alloy cast steel Cr-Mo-V after long time creep sernice, Journal of Achievements in Materials and Manufacturing Engineering 25 (2007) 33-36.
• [3] S. Stachura, The changes of structure and mechanical properties of steels and cast steels after log term serviced at elevated temperatures, Energetic 2 (1999) 109-115 (in Polish).
• [4] W. Brunne, Material fatique degradation in cast HP pipe cross, Energetic 2 (1999) 219-222.
• [5] Z. Lu, R.G. Faulkner, P.E.J. Flewitt, The role of irradation – induced phosphorus segregation in the DBTT temperature in ferritic steel, Materials Science Engineering A 437 (2006) 306-312.
• [6] J. Okrajni, K. Mutwil, M. Cieśla, Chemical pipelines material fatigue, Proceedings of the 13th Scientific International Conference “Achievements in Mechanical and Materials Engineering” AMME'2005, Gliwice – Wisła, 2005, 497-502.
• [7] J. Trzeszczyński , E. Grzesiczek, W. Brunne , Effectiveness of solutions extending operation time of long operated cast steel elements of steam turbines and steam pipelines, Energetic 3 (2006) 179-184 (in Polish).
• [8] G. Golański, J. Kupczyk, S. Stachura, B. Gajda, Regenerative heat treatment of Cr-Mo-V cast steel after long term serviced, Materials Science and Engineering 3 (2006) 147-150 (in Polish).
• [9] A. Rehmus – Forc, Change of structure after revitalizatrion cylinders of a steam turbine, Materials Science and Engineering 3 (2006) 265-267 (in Polish).
• [10] G. Golański, S. Stachura, B. Gajda, J. Kupczyk, Influence of the cooling rate on structure and mechanical properties of L21HMF cast steel after regenerative heat treatment, Archives of Foundry 6 (2006) 143-150 (in Polish).
• [11] G. Golański, S. Stachura, B. Gajda-Kucharska, J. Kupczyk, Optimisation of regenerative heat treatment parameters of G21CrMoV4 -6 cast steel, Archives of Materials Science and Engineering 28/6 (2007) 341-344.
• [12] S. Stachura, J. Kupczyk, M. Gucwa, Optimization of structure and properties of Cr-Mo and Cr-Mo-V cast steel intended for use at increased temperature, Archives of Foundry 54/5 (2004) 402-408.
• [13] M.C. Murphy, G. D. Branch, The microstructure, creep and creep – rupture properties of Cr-Mo-V steam turbine casing castings, JISI, 1969.
• [14] B.A. Senior, A critical review of precipitation behaviour in 1Cr-Mo-V rotor steels, Materials Science and Engineering A 103 (1988) 263-271.
• [15] K.R. Williams, B. Wilshire, Microstructural instability of 0.5Cr-0.5Mo-0.25V creep-resistant steel during service at elevated temperatures, Materials Science and Engineering 47 (1981) 151-154.