The Effect of the Number of Eutectic Grains on Coating Growth During Hot Dip Galvanising of Ductile Iron Castings

• Autorzy: Kopyciński D. , Guzik E. , Szczęsny A.

Identyfikatory

DOI

10.2478/afe-2014-0016

• Języki publikacji: EN

Abstrakty

EN

Studies were conducted on a zinc coating produced on the surface of ductile iron grade EN-GJS-500-7 to determine the eutectic grain effect. For this purpose, castings with a wall thickness of 5 to 30 mm were made and the resulting structure was examined. To obtain a homogeneous metal matrix, samples were subjected to a ferritising annealing treatment. To enlarge the reaction surface, the top layer was removed from casting by machining. Then hot dip galvanising treatment was performed at 450°C to capture the kinetics of growth of the zinc coating (in the period from 60 to 600 seconds). Analysing the test results it was found that within the same time of hot dip galvanising, the differences in the resulting zinc coating thickness on samples taken from castings with different wall cross-sections were small but could, particularly for shorter times of treatment, reduce the continuity of the alloyed layer of the zinc coating.

Słowa kluczowe

EN

casting quality management; zinc coating; ductile iron; eutectic grains

PL

zarządzanie jakością odlewów; powłoka cynkowa; żeliwo sferoidalne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 1
• Strony: 67--70
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Kopyciński D.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Guzik E.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Szczęsny A.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] Kopyciński, D. (2010). The shaping of zinc coating on surface steels and ductile iron casting. Archives of Foundry Engineering, 10, 463-470.
• [2] Kopyciński, D., Guzik, E. & Wołczyński, W. (2006). The shaping of zinc coating at the surface of ductile cast iron. Inżynieria Materiałowa. 5, 1081-1084.
• [3] Kolisnyk, P.S., Allen, C.J. (1994). Galvanizing Reactive Steel. AGA TECH FORUM. Dallas, Texas, USA. October 12-15 1994, pp. 199-205.
• [4] Maass, P., Peissker, P. (1998). Hot-dip galvanizing. Publishing Agency - Placet. Warsaw.
• [5] Strutzenberger, J. & Faderl, J. (1998). Solidification and spangle formation of hot-dip galvanized zinc coatings. Metallurgical and Materials Transactions. 28A, 631-642.
• [6] Marder, A.R. (2000). The metallurgy of zinc-coated steel. Progress in Materials Science. 45, 191-271.
• [7] Jordan, C.E. & Marder, A.R. (1998). The effect of iron oxide as an inhibition layer on iron-zinc reactions during hot-dip galvanizing. Metallurgical and Materials Transactions. 29B, 479-484.
• [8] Jordan, C.E. & Marder, A.R. (1997). Effect of substrate grain size on iron – zinc reaction kinetics during hot-dip galvanizing. Metallurgical and Materials Transactions. 28A, 2683-2694.
• [9] Guzik, E. (2010). Structure and mechanical properties as well as application of high quality vermicular cast iron. Archives of Foundry Engineering, 10, 95-100.
• [10] Kopyciński, D. & Guzik, E. (2008). The zinc coating on the surface ductile cast iron. Inżynieria Materiałowa. 6, 780-783.
• [11] Kopyciński, D. & Szczęsny, A. (2012). The effect of ductile iron matrix on zinc coating during hot dip galvanising of castings. Archives of Foundry Engineering. 12, 101-104.