Influence of Boron on Crystallization and Microstructure of Ductile Cast Iron

• Autorzy: Dojka R. , Studnicki A.

Identyfikatory

DOI

10.1515/afe-2017-0043

• Języki publikacji: EN

Abstrakty

EN

The objective of the research was to determine the influence of boron on the crystallization process and microstructure of ductile cast iron. In the case of ductile cast iron it is a vital issue because even as little as trace presence of boron changes the properties of ductile cast iron in a significant way. With the use of a new ATD-4 (TDA) tester and CRYSTALDIGRPAH converter it was possible to measure the crystallization process parameters of the same alloy with four different contents of boron in one mould. Four samples with different boron contents were extracted, their microhardness was measured and quantitative analysis of microstructure was conducted. Obtained results allowed to state that with increasing content of boron the amount of graphite precipitates decreases, the amount of pearlite precipitates increases, the shape of graphite precipitates deteriorates and hardness increases. It is also planned to perform additional testings with boron contents between previously tested values.

Słowa kluczowe

EN

solidification process; metallography; ductile cast iron; boron; TDA

PL

proces krzepnięcia; metalografia; żeliwo sferoidalne; bor; TDA

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 2
• Strony: 15--20
• Opis fizyczny: Bibliogr. 7 poz., il., tab., wykr.

Twórcy

autor

Dojka R.

• Department of Foundry, Silesian University of Technology, Towarowa 7, 44-100 Gliwice, Poland

autor

Studnicki A.

• Department of Foundry, Silesian University of Technology, Towarowa 7, 44-100 Gliwice, Poland

Bibliografia

• [1] Sakwa, W. (1974). Cast Iron. Katowice: Śląsk. (In Polish).
• [2] Krynitsky, A.I. & Stern, H. (1949). Effect of the structure and some physical properties of plain cast irons. Journal of Research of the National Bureau of Standards. 42(5), 465-479.
• [3] Ankamma, K.J. (2014). Effect of Trace Elements (Boron and Lead) on the Properties of Gray Cast Iron. Journal of The Institution of Engineers. 95(1), 19-26. DOI: 10.1007/s40033-013-0031-3.
• [4] Izui, S., Furumiya, N., Horie, H., Kowata, T. & Takahashi T. (1994). Effect of Small Amount of Boron on Matrix Structure of Spheroidal Graphite Cast Iron. The Journal of the Japan Foundrymen's Society. 66(10), 745-750. (in Japanese).
• [5] Zou, Y., Ogawa, M. & Hideo, N. (2012). Interaction of Boron with Copper and Its Influence on Matrix of Spheroidal Graphite Cast Iron. ISIJ International. 52(3), 505-509.
• [6] Zou, Y., Ogawa, M. & Nakae H. (2011). Influence of Boron on the Matrix of Spheroidal Graphite Cast Iron and Its Counteraction Method. Materials Science (MS&T). 1, 409-416.
• [7] Singh, L.B. (2009). Improvement in properties of grey iron after boron additions. In 57th IFC 2009, 13-15 February 2009 (pp. 166-171). Kolkota, India.

Uwagi

EN

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)