Precipitation kinetics in austenitic 18Cr-30Ni-Nb cast steel

• Autorzy: Garbiak M. , Chylińska R.
• Języki publikacji: EN

Abstrakty

EN

The study presents the results of investigations on the precipitation kinetics in austenitic 18%Cr-30%Ni cast steel stabilised with an addition of 1.84 wt% niobium. Phase analysis of isolates extracted from the alloy subjected to annealing within the temperature range of 600–1000^oC during 10–1000 h was made. The phase constitution of the isolates mainly comprised niobium carbides of the NbC type and complex chromium carbides of the Cr₂₃C₆ type. In specimens annealed within the temperature range of 700–900^oC, a high-silicon G phase was additionally identified. The highest kinetics of the precipitation process was recorded after annealing at the temperatures of 800 and 900^oC.

Słowa kluczowe

EN

Ni-Cr cast steel; precipitation; niobium carbide; G phase

PL

staliwo Ni-Cr; węglik niobu; faza G

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 3s
• Strony: 27--30
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Garbiak M.

• Szczecin University of Technology , Al. Piastów 17, 70-310 Szczecin, Poland

autor

Chylińska R.

• Szczecin University of Technology , Al. Piastów 17, 70-310 Szczecin, Poland

Bibliografia

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• [2] M. Garbiak: Fracture toughness of stabilised 0.3% C-30%Ni-18% Cr cast steel. ATMiA, Poznań 2007, 1(2007)27-32.
• [3] B. Piekarski, M. Garbiak: Effect of Nb and Ti on microstructure and mechanical properties of 30%Ni/18% Cr cast steel after annealing. Metalurgija, 41(2002)65-128.
• [4] S.J. Zhu et al.: Effect of niobium on creep and crack growth of cast Ni-Cr austenitic steel. Mat. Sc. Techn. 6 (1990) 1193-1198.
• [5] D.J. Powell, R. Pilkington, D.A. Miller: The precipitation characteristics of 20%Cr/25%Ni-Nb stabilised stainless steel. Acta Metall. 36(1988)713-724.
• [6] G.D.A. Soares et al: Niobium additions in HP heat resistant cast stainless steel. Mat. Char. 29 (1992) 387-396.
• [7] L.H. Almeida, A.F. Ribeiro, I. Le May: Microstructural characterization of modified 25Cr-35Ni centrifugally cast steel furnace tubes. Mat. Charact. 49 (2003) 219-229.
• [8] B. Piekarski: Podwyższanie trwałości staliwa 0.3%C-30%Ni-18%Cr przeznaczonego do pracy w warunkach udarów cieplnych. Projekt badawczy nr 3 T08B 048 27.
• [9] R. Chylińska, M. Garbiak, B. Piekarski: Electrolytic Phase Extraction in Stabilised Austenitic Cast Steel. Mat. Sci. 4 (2005) 348-351.