Oxygen Activity in Melts of Fe-C-Cr-Ni Based Alloys

• Autorzy: Záděra A. , Dulava M. , Pernica V. , Kaňa V.
• Języki publikacji: EN

Abstrakty

EN

Oxygen is an element that is first purposely brought into the steel melt to remove some unwanted elements or to reduce their concentration (oxidation). In the made cast steel there is on the contrary necessary to reduce the oxygen content with the use of deoxidation to such a level in order to avoid a reaction with carbon with the formation of CO bubbles. Concentration of oxygen in steel before casting is given, in particular, by the manner of metallurgical processing and the used deoxidation process. Oxygen is found in molten steels both as chemically bound in the form of oxides and in the form of oxygen dissolved in the solution – the melt. Chemical composition of the melt strongly influences the activity of oxygen dissolved in the melt and further on the composition of oxidic inclusions forming in the melt during the reaction with oxygen. In the Fe-C-Cr-Ni based alloys in the reaction with oxygen greatly participates also chrome, whose products are often in solid state and they are the cause of forming such defects as e.g. oxidic films.

Słowa kluczowe

EN

oxygen activity; polycomponent solution; thermodynamic equilibrium; activity coefficient

PL

aktywność tlenu; równowaga termodynamiczna; współczynnik aktywności

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 181--186
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Záděra A.

• Foundry Department, Institute of Manufacturing Technology, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, Brno, Czech Republic

autor

Dulava M.

• S+C ALFANAMETAL, s.r.o., Tršice, Czech Republic

autor

Pernica V.

• Foundry Department, Institute of Manufacturing Technology, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, Brno, Czech Republic

autor

Kaňa V.

• Foundry Department, Institute of Manufacturing Technology, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, Brno, Czech Republic

Bibliografia

• [1] Záděra, A., Šenberger, J., Elbel, T. (2009). Reoxidation processes in the casting of ferrous alloys. ČSS. ČSS. Brno: Česká slévárenská společnost. ISBN: 978-80-02-02192-6. (in Czech).
• [2] Šenberger, J., Bůžek, Z., Záděra, A., Stránský, K., Kafka, V. (2008). Metallurgy cast steel. Brno: VUT v Brně – Nakladatelství Vutium. ISBN: 978-80-214-3632-9. (in Czech).
• [3] Röring, K. (1992). International steel casting symposium, 22. 10. – 23. 10 1992 Linz, Vöst Alpine Stahl Linz, sborník pp. 89-106.
• [4] Dulava, M., Záděra, A., Šenberger, J. (2013). Deoxidants resistant steels. In 50. slévárenské dny, Blok E – Sekce metalurgie oceli na odlitky a ingoty. Brno: Česká slévárenská společnost. 12-13. 11. 2013. Brno, pp. 33–40. ISBN 978-80-02-02495-8.
• [5] Šenberger, J., Záděra, A. & Čech, J. (2012). Influence of compound deoxidation of steel with Al, Zr, rare earth metals, and Ti on properties of heavy castings. Archives of Foundry Engineering. 12(1), 99-104. ISSN 1897-3310.
• [6] Šenberger, J., Záděra, A. & Čech, J. (2011).Checking the metallurgy with the aid of inclusion analysis. Archives of Foundry Engineering. 11(1), 118-122. ISSN 1897-3310.

Uwagi

PL

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