The change of solidification mechanism of ferritic-austenitic cast steel

• Autorzy: Stradomski G. , Stradomski Z. , Denis-Brewczyńska D.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents the results of research on the microstructure changes of two grade of duplex cast steels with a varying carbon, with and without addition of copper. Design/methodology/approach: The addition of copper have a significant effect on the microstructure of analyzed cast steels. The changes in the mechanism of solidification was also observed during numerical simulation made in the FactSage softwares. Findings: The cause for undertaking the research were technological problems with hot cracking in bulk castings of duplex cast steel with a carbon content of approx. 0.06%. Practical implications: The research has shown a significant effect of increased carbon content on the ferrite and austenite microstructure morphology, while exceeding the carbon content of 0.06% results in a change of the shape of primary grains from equiaxial to columnar. Originality/value: Among the steel and cast steel resistant to corrosion most modern and dynamically developing group are ferritic-austenitic alloys, commonly known as duplex. Higher than austenitic steels, mechanical properties and good corrosion resistance in both overall and pitting make duplex steels irreplaceable material in the petrochemical industry, power, pulp and paper, food.

Słowa kluczowe

EN

duplex cast steel; microstructure; primary structure; numerical solidification simulation

PL

staliwo typu duplex; mikrostruktura; struktura pierwotna; symulacja numeryczna krzepnięcia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2014
• Tom: Vol. 63, nr 2
• Strony: 58--64
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Stradomski G.

• Institute of Plastic Forming Processes and Safety Engineering, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Stradomski Z.

• Institute of Materials Science, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Denis-Brewczyńska D.

• Chair of Metal Extraction and Recirculation, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] Z. Stradomski, M.S. Soiński, G. Stradomski, The assessment of hot cracking susceptibility of ferritic-austenitic cast iron, Archives of Foundry Engineering 10/2 (2010) 159-162.
• [2] D. Dyja, Z. Stradomski, C. Kolan, G. Stradomski, Eutectoid decomposition of δ-ferrite in ferritic-austenitic duplex cast steel – structural and morphological study, Materials Science Forum 706-709 (2012) 2314-2319.
• [3] G. Stradomski, M.S. Soiński, K. Nowak, A. Szarek, The assessment of tendency to develop hot cracks in the duplex casts, Steel Research International, Special Edition Metal Forming (2012) 1231-1234.
• [4] D. Dyja, Z. Stradomski, Solidification model of highly alloyed FE-Cr-Ni cast steels, Archives of Foundry 6/19 (2006) 81-88.
• [5] J.-I. Cho, C.-W. Kim, Y.-C. Kim, S.-W. Choi, C.-S. Kang, The Relationship between Dendrite Arm Spacing and Cooling Rate of Al-Si Casting Alloys in High Pressure Die Casting, in: ICAA13: 13th International Conference on Aluminum Alloys, 2012.
• [6] L. Dongmei, L. Xinzhong, S. Yanqing, P. Peng, L. Liangshun, G. Jingjie, F. Hengzhi, Secondary dendrite arm migration caused by temperature gradient zone melting during peritectic solidification, Acta Materialia 60 (2012) 2679-2688.
• [7] B. Kalandyk, M. Starowicz, Mechanical properties and corrosion behaviour of 18Cr-11Ni-2,5Mo cast steel, Archives of Foundry Engineering 9/4 (2009) 87-90.
• [8] J. Olsson, S. Malin, Duplex – A new generation of stainless steels for desalination plants, Desalination 205 (20070 104-113.
• [9] L. Ping, C. Qizhou, W. Bokang, Failure analysis of the impeller of slurry pump used in zinc hydrometallurgy process, Engineering Failure Analysis 13 (2006) 876-885.
• [10] S. Pietrowski, G. Gumienny, M. Masalski, Selected properties of new „duplex” cast steel, Archives of Foundry Engineering 11/4 (2011) 123-130.
• [11] G. Stradomski, The role of carbon in the mechanism of ferritic-austenitic cast steel solidification, Archives of Foundry Engineering 14/3 (2014) 83-86.