The Influence of the Shape of Graphite Precipitates on the Cast Iron Abrasion Resistance

• Autorzy: Jakubus A. , Soiński M. S.

Identyfikatory

DOI

10.24425/afe.2019.129635

• Języki publikacji: EN

Abstrakty

EN

The paper presents the initial results of investigation concerning the abrasion resistance of cast iron with nodular, vermicular, or flake graphite. The nodular and vermicular cast iron specimens were cut out of test coupons of the IIb type with the wall thickness equal to 25 mm, while the specimens made of grey cast iron containing flake graphite were cut out either of special casts with 20 mm thick walls or of the original brake disk. The abrasion tests were carried out by means of the T-01M tribological unit working in the pin-on-disk configuration. The counterface specimens (i.e. the disks) were made of the JT6500 brand name friction material. Each specimen was abraded over a distance of 4000 m. The mass losses, both of the specimens and of the counterface disks, were determined by weighting. It was found that the least wear among the examined materials was exhibited by the nodular cast iron. In turn, the smallest abrasion resistance was found in vermicular cast iron and in cast iron containing flake graphite coming from the brake disk. However, while the three types of specimens (those taken from the nodular cast iron and from grey cast iron coming either from the special casts or from the brake disk) have almost purely pearlitic matrix (P95/Fe05), the vermicular cast iron matrix was composed of pearlite and ferrite occurring in the amounts of about 50% each (P50/Fe50). Additionally, it was found that the highest temperature at the cast iron/counterface disk contact point was reached during the tests held for the nodular cast iron, while the lowest one occurred for the case of specially cast grey iron.

Słowa kluczowe

EN

nodular cast iron; vermicular cast iron; grey cast iron; abrasion resistance

PL

żeliwo sferoidalne; żeliwo wermikularne; żeliwo szare; odporność na ścieranie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 4
• Strony: 87--90
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Jakubus A.

• The Jacob of Paradies University in Gorzów Wielkopolski, Gorzów Wielkopolski, Poland

autor

Soiński M. S.

• The Jacob of Paradies University in Gorzów Wielkopolski, Gorzów Wielkopolski, Poland

Bibliografia

• [1] Podrzucki, C. (1991). Cast iron. Structure, properties, applications, vol. 1 and 2. Cracow: Ed. ZG STOP. (in Polish).
• [2] Kopyciński, D., Kawalec, M., et al. (2013). Analysis of the Structure and Abrasive Wear Resistance of White Cast Iron With Precipitates of Carbides. Archives of Metallurgy and Materials. 58(3), 973-976.
• [3] Szajnar, J., Walasek, A. & Baron, C. (2013). Tribological and Corrosive Properties of the Parts of Machines with Surface Alloy Layer. Archives of Metallurgy and Materials. 58(3), 931 - 936.
• [4] Hebda, M., Wachal, A. (1980). Tribology. Warsaw: Ed. WNT. (in Polish).
• [5] Kaźmierczak, A. (2005). Friction and wear in the piston-piston rings-cylinder assembly. Wrocław: Publishing House of the Wrocław University of Science and Technology. (in Polish).
• [6] Polish Standard PN-EN 1563, (2000). Founding. Spheroidal graphite cast iron.
• [7] Polish Standard PN-EN ISO 945-1: Microstructure of cast irons. Part 1: Graphite classification by visual analysis. November 2009. Amendment PN-EN ISO 945-1:2009/AC. April 2010.
• [8] Polish Standard PN-75/H-04661: Grey cast iron, nodular cast iron and malleable. Metallographic examinations. Determination of microstructure
• [9] Institute for Sustainable Technologies. National Research Insitute. User manual. T-01M pin-on-disk tribological testing machine. Radom 2010. (in Polish).
• [10] makland.com.pl. 28.02.2016, 13:25.
• [11] PN-C-82055-10:1992. Methods of examination of refined carbon products – Determination of true density, apparent density, absorbability, total porosity and open porosity. June 1992.
• [12] PN-EN ISO 2039-1:2004 Plastics – Determination of hardness – Part 1: Ball indentation method. March 2004.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)