The influence of the heat treatment on the microstructure and tribological properties of mottled cast iron

• Autorzy: Krawczyk J. , Pacyna J. , Pawłowski B. , Madej M. , Bała P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The objective of this work was to determine the influence of microstructure changes on GJS-HV300(SiNiCr2-3) cast iron tribological properties. Modification of the investigated cast iron microstructure was carried out by the heat treatment. Design/methodology/approach: The tribological tests were performed on the T05 tester at a load of 100 N. Bearing steel 100Cr6 of a hardness of 57 HRC was applied as a counter sample. The test duration time was 2000 s. During the tribological test the continuous measurements of the friction coefficient were carried out and the friction products were being removed from the counter sample surface. The tribological tests were performed at a room temperature. A stereological analysis of volume fractions of structural components (VV) was performed by means of the point method, with the application of a network deposited on the microstructure photographs. For each variant of the heat treatment 30 depositions of the network were performed. Measurements were done on microphotographs obtained by using an objective of 50 times magnification. The network with 200 measurement points was applied. Findings: Predicting of wear resistance only on the basis of hardness is unappropriate. The main factor here is the mechanism of wear, which is influenced mainly by the microstructure. Research limitations/implications: The relationship between the hardness resulting from the microstructure and the wear resistance of the investigated cast iron was presented. This supplements the knowledge concerning the role of the microstructure in the formation of tribological properties of cast iron. Practical implications: Predicting of the tribological properties of mill rolls. Originality/value: Heat treatment resulting in decrease of volume fraction of ledeburitic cementite and increase of volume fraction of graphite decreases wear resistance of investigated material.

Słowa kluczowe

EN

tool materials; cast iron; tribological properties; microstructure

PL

materiały narzędziowe; żeliwo; właściwości tribologiczne; mikrostruktura

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2013
• Tom: Vol. 57, nr 1
• Strony: 15--22
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Krawczyk J.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Pacyna J.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Pawłowski B.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Madej M.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Bała P.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

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