Impact strength of as-cast and heat-treated nodular cast iron

• Autorzy: Soiński M. S. , Będkowski P.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with comparing the impact strength of as-cast nodular cast iron with ferritic-pearlitic matrix (pearlite fraction up to 20%) and of the same material subjected to graphitising (one- or two-stage process) in order to achieve ferritic structure. It has been found that the impact strength of cast iron samples is significantly higher after the heat treatment than in the as-cast state. The two-stage process increases the impact strength at any of examined temperature values to a greater degree than the one-stage graphitising. Also the character of impact strength changes against the change of temperature (from 20°C to -40°C) is different depending on the type of the previously applied treatment. It has been also found that the impact strength value strictly depends on the position within the test bar from which a sample has been taken.

Słowa kluczowe

EN

mechanical properties; nodular cast iron; impact strength; heat treatment; metallography

PL

żeliwo sferoidalne; udarność; obróbka cieplna; metalografia

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 1
• Strony: 113--118
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Soiński M. S.

autor

Będkowski P.

• Politechnika Częstochowska, Katedra Odlewnictwa, 42-200 Częstochowa, ul. Armii Krajowej 19,

Bibliografia

• [1] C. Podrzucki, Cast iron. Structure, properties, application, ZG STOP, Kraków, 1991 (in Polish).
• [2] T. Warchala, Metallurgy and casting of cast iron. Part I, Structure and properties, Politechnika Częstochowska, Częstochowa 1988 (in Polish).
• [3] M.S. Soiński, M. Mitko, S. Tomczyński, J. Szczerba, E. Gołąbek, Nodular cast iron for working in the lowered temperatures, Acta Metallurgica Slovaca, vol. 8, No 2/2002 (2/2), 28-32 (in Polish).
• [4] M. I. Jakovlev, E.S. Pestov, A.D. Andreev, Freezeproof cast iron with nodular graphite, Litejnoe Proiizvodstvo, No 3 (2001), 6-7 (in Russian).
• [5] Multi-author work, Engineer's Handbook. Casting, vol. II, WNT, Warsaw, 1986 (in Polish).
• [6] W. Siefer, K. Orths, Mechanical properties of ferritic nodular cast iron in negative temperature, Giessereiforschung, vol. 33, No 3 (1981), 109-118 (in German).
• [7] W. Siefer, Dependence of the impact strength on the temperature of the GGG-40.3 nodular cast iron, Giesserei, vol. 78, No 7 (1991), 270-272 (in German).
• [8] W. Siefer, Dependence of the impact strength on the temperature of the GGG-40.3 nodular cast iron Giessereiforschung, vol. 43, No 1 (1991), 25-36 (in German).
• [9] M.S. Soiński, M. Mitko, S. Tomczyński, Ł. Bronik, Impact resistance of ferritic nodular cast iron, Archives of Foundry, vol. 4, No 11 (2004), 190-195 (in Polish).
• [10] M.S. Soiński, R. Muzyka, Impact strength of pearlite-ferritic nodular cast iron, Archives of Foundry, vol. 6, No 19 (2006), 295-300 (in Polish).
• [11] M.S. Soiński, R. Muzyka, Impact resistance of nodular cast iron subjected to graphitizing for the purpose of obtaining ferritic structure, Archives of Foundry, vol. 6, No 22 (2006), 441-448 (in Polish).