The Cracking Mechanism of Ferritic- Austenitic Cast Steel

• Autorzy: Stradomski G.
• Języki publikacji: EN

Abstrakty

EN

In the high-alloy, ferritic - austenitic (duplex) stainless steels high tendency to cracking, mainly hot-is induced by micro segregation processes and change of crystallization mechanism in its final stage. The article is a continuation of the problems presented in earlier papers [1-4]. In the range of high temperature cracking appear one mechanism a decohesion - intergranular however, depending on the chemical composition of the steel, various structural factors decide of the occurrence of hot cracking. The low-carbon and low-alloy cast steel casting hot cracking cause are type II sulphide, in high carbon tool cast steel secondary cementite mesh and/or ledeburite segregated at the grain solidified grains boundaries, in the case of Hadfield steel phosphorus - carbide eutectic, which carrier is iron-manganese and low solubility of phosphorus in high manganese matrix. In duplex cast steel the additional factor increasing the risk of cracking it is very "rich" chemical composition and related with it processes of precipitation of many secondary phases.

Słowa kluczowe

EN

duplex cast steel; hot cracking; solidification process; sigma phase

PL

staliwo duplex; pękanie na gorąco; proces krzepnięcia; faza sigma

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 153--156
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Stradomski G.

• Institute of Plastic Deformation and Safety Engineering, Technical University of Częstochowa, Poland

Bibliografia

• [1] Stradomski, Z., Stachura, S. & Stradomski, G. (2013). Fracture mechanisms in steel castings. Archives of Foundry Engineering. 13(3), 88-91.
• [2] Stradomski, G. (2014). The role of carbon in the mechanism of ferritic-austenitic cast steel solidification. Archives of Foundry Engineering. 14(3), 83-86.
• [3] Stradomsk,i G., Stradomski, Z. & Denis-Brewczyńska, D. (2014). The change of solidification mechanizm of ferritic - austenitic cast steel. Journal of Achievements in Materials and Manufacturing Engineering. 63, 58-64.
• [4] Stradomski, G., Soiński, M.S., Nowak, K., Szarek, A. (2012). The assessment of tendency to develop hot cracks in the duplex casts. Steel Research International Spec. Edition Metal Forming, 1231-1234.
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• [10] Shargay, C. (2005). Application of duplex stainless steels in refining. Stainless Steel World. 17, 19-27.
• [11] Marken, L. (2005). Application of duplex and super duplex stainless steels in the offshore industry- Case histories. Stainless Steel World Conference & Expo, Maastricht, Netherlands 8-10 November, 318-323.
• [12] Cassagne, T., Busschaert, F. (2007). Experience with duplex stainless steels in oil and gas production, Duplex Conference, Stainless Steel World, Grado, Italy.
• [13] Sieurin, H. & Sandstrom, R. (2007). Sigma phase precipitation in duplex stainless steel 2205. Materials Science and Engineering A. 444, 271-276.
• [14] Hsieh, C.C., Wu, W. (2012). Overview of intermetallic sigma (σ) phase precipitation in stainless steels. ISRN Metallurgy, 1-16.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.