Microstructure and tribological properties of mottled cast iron with different chemical composition

• Autorzy: Krawczyk J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The role of the chemical composition of cast irons for mill rolls in tendencies of diffusionless transformations in the matrix was determined. The investigations of the chemical composition, microstructure and hardness influence on tribological properties of mottled cast iron is presented in the paper. Design/methodology/approach: The research stand is generally used in the tribological tests, and the counter sample of the material also common in such tests. Bearing steel 100Cr6, of a hardness of 57 HRC, was applied as a counter sample. The tribological tests were performed at a load of 100 N. Samples for tests were taken from seven mill rolls made by various producers. Mottled cast irons had a different chemical composition. Findings: The role of individual alloying elements in a tendency of the diffusionless transformations in the matrix, hardness, wear resistance and friction coefficient of mottled cast irons used for the mill rolls was estimated. The hardness increase rather increases the wear resistance of the investigated cast irons. Research limitations/implications: The possibility of designing the chemical composition of mottled cast iron in such a way as to obtain the low tribological wear at retaining, at the same time, the high friction coefficient was found. The relationship between the hardness resulting from the chemical composition and the wear resistance of the investigated mottled cast irons was presented. Practical implications: The obtained results can be utilised in designing the chemical compositions of the cast iron mill rolls and to obtain materials characterised by the high wear resistance at the assumed friction coefficient. Originality/value: Surprisingly, the increased chromium content seems to decrease the wear resistance of the investigated cast irons and the wear resistance of the investigated mottled cast irons is rather decreasing when the coefficient of friction increases.

Słowa kluczowe

EN

tool materials; cast iron; tribological properties; chemical composition

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2011
• Tom: Vol. 51, nr 1
• Strony: 5--15
• Opis fizyczny: Bibliogr. 26 poz.

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,

Bibliografia

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