Effect of Wall Thickness on the Microstructure of Ductile Iron Castings Manufactured by the Inmold Process Using a Reaction Chamber

• Autorzy: Kamińska J. , Angrecki M. , Stefański Z. , Palma A.

Identyfikatory

DOI

10.24425/123632

• Języki publikacji: EN

Abstrakty

EN

In the family of iron-based alloys, ductile iron enjoys the highest rate of development, finding application in various industries. Ductile iron or the cast iron with spheroidal graphite can be manufactured by various methods. One of them is the Inmold spheroidization process characterized by different technological solutions, developed mainly to increase the process efficiency. So far, however, none of the solutions has been based on the use of a reactor made outside the casting mould cavity. The method of spheroidization inside the casting mould using a reaction chamber developed at the Foundry Research Institute is an innovative way of cast iron treatment. The innovative character of this method consists in the use of properly designed and manufactured reactor placed in the casting mould cavity. Owing to this solution, the Inmold process can be carried out in moulds with both horizontal and vertical parting plane. The study presents the results of examinations of the microstructure of graphite precipitates and metal matrix of castings after spheroidization carried out by the Inmold process using a reactor and mould with vertical parting plane. Special pattern assembly was made for the tests to reproduce plates with wall thicknesses of 3; 5; 7; 10; 20 and 30 mm. The content of residual magnesium was determined for all tested castings, while for castings of plates with a wall thickness equal to or larger than 10 mm, testing of mechanical properties was additionally performed.

Słowa kluczowe

EN

ductile iron; inmold process; reaction chamber; vertical mould parting plane; cast iron microstructure

PL

żeliwo sferoidalne; technologia inmold; komora reakcyjna; mikrostruktura żeliwa

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2018
• Tom: Vol. 18, iss. 4
• Strony: 50--54
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Kamińska J.

• Foundry Research Institute, Department of Technology, Zakopianska 73, 30-418 Cracow, Poland

autor

Angrecki M.

• Foundry Research Institute, Department of Technology, Zakopianska 73, 30-418 Cracow, Poland

autor

Stefański Z.

• Foundry Research Institute, Department of Technology, Zakopianska 73, 30-418 Cracow, Poland

autor

Palma A.

• Foundry Research Institute, Department of Technology, Zakopianska 73, 30-418 Cracow, Poland

Bibliografia

• [1] Fraś, E. (1992). Crystallization of metals and alloys. Wydawnictwo PWN, Warszawa. (in Polish).
• [2] Fraś, E. (1998). The theory of the relationship between supercooling, and the number of globular eutectic grains. Krzepnięcie Metali i Stopów. 36, 19-26. (in Polish).
• [3] Guzik, E., Porębski, M. & Asłanowicz, M. (1999). Using cored wire injection method in the production of vermicular and nodular cast iron. Acta Metallurgica Slovaca. 5, 297-301.
• [4] Smalley, O. (1975). Treatment of Nodular-graphite Iron by teh Inmould Process. Foundry Trade Journal, 139(3068), 423-430.
• [5] Stawarz, M. (2004). Comprehensive quality assessment of nodular cast iron. Eksploatacja i niezawodność. 2, 55-58. DOI: 10,17531. (in Polish).
• [6] Ohide, T., Kishida, M., Kimura, T. & Takemoto Y. (1997). Formation of Alteration Morphology of Graphite Structure by Modified Inmould Process and Observation of Fluid Flow by Water Model. Journal of Japan Foundry Engineering Society. 16(1), 27-34. DOI:10.11279/ jfes.69.27.
• [7] Kranc, M, Gwiżdż, A. & Jaśkowiec, K. (2013). The assessment of changes of the structure of ductile cast iron depending on the time and temperature of the metallurgic process. Prace Instytutu Odlewnictwa. LIII(2), 3-13. DOI:10.7356/iod.2013.5.
• [8] Guzik, E. (2001). Processes for refining cast iron. Selected Issues Monografia. Nr 1. Wydawnictwo Archives of Foundry. Komisja Odlewnictwa PAN. (in Polish).
• [9] Warchala, T. (1995). Metallurgy and foundry. Wydawnictwo Politechniki Częstochowskiej. (in Polish).
• [10] Guzik, E. (1998). Structure and properties of spheroidal cast iron obtained by PE technique. Solidification of Metals and Alloys. 36, 57-62. (in Polish).
• [11] Smalley, O. (1975). Treatment of Nodular-graphite Iron by teh Inmould Process. Foundry Trade Journal, 139(3068), 423-430.
• [12] Stefański Z., Pytel A. (2015). Patent PL 220357 B1. Urząd Patentowy Rzeczpospolitej Polskiej. (in Polish).
• [13] Stefański, Z., Kamińska, J., Pamuła, E., Angrecki, M. & Palma, A. (2018). Comparing the effectiveness of cast iron spheroidization by the traditional method and using a reaction chamber (reactor) placed in foundry mould. Archives of Foundry Engineering. 18(1), 191-195. DOI: 10.1515.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).