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The paper contains CCT diagrams presenting a transformation kinetics of under-cooled austenite from two new bainitic cast steels which the scissors crossovers for heavy-duty railway tracks (min. 230kN/axle) at the speed up to 200 km/h are made of. The cooling ranges of UIC60 type railway tracks plot on the CCT diagrams indicate that there is a 100% bainitic structure in the scissors crossovers made of these cast steels as well, but mainly it would be a favourable for cracking resistance lower bainite. The achievable hardness of scissors crossovers made of new materials make it possible to use high-temperature tempering resulting in obtaining of good crack resistance. However one should provide a good quality of castings made.
Czasopismo
Rocznik
Tom
Strony
111--114
Opis fizyczny
Bibliogr. 15 poz., rys.
Twórcy
autor
autor
- Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, ul. Mickiewicza 30, 30-059 Kraków, pacyna@uci.agh.edu.pl
Bibliografia
- [1] E. Tasak, A. Ziewiec, K. Ziewiec, The problems appearing during the reparation of welds in dissimilar steels, Archives of Foundry, vol. 6, No. 21 (2006) 221-227 (in Polish).
- [2] J. Pacyna, The first Polish bainitic rails, Polish Metallurgy in years 2002-2006, Committee of Metallurgy of The Polish Academy of Science, Krakow (2006) 651-656 (in Polish).
- [3] F.C. Robles Hernández, N.G. Demas, D.D. Davis, A.A. Polycarpou, L. Maal, Mechanical properties and wear performance of premium rail steels, Wear 263 (2007) 766-772.
- [4] K.M. Lee, A.A. Polycarpou, Wear of conventional pearlitic and improved bainitic rail steels, Wear 259 (2005) 391-399.
- [5] G. Golański, S. Stachura, B. Gajda, J. Kupczyk, Influence of the coolong rate on structure and mechanical properties of L21HMF cast steel after regenerative heat treatment, Archives of Foundry, vol. 6, No. 21 (2006) 143-150 (in Polish).
- [6] T. Szykowny, Ductile cast iron structure forming during continuous cooling, Archives of Foundry, vol. 3, No. 8 (2003) 111-118 (in Polish).
- [7] T. Szykowny, Influence of stereological properties of graphite on the anizothermal eutectoidal transformation in spheroidal cast iron, Archives of Foundry, vol. 6, No. 19 (2006) 331-340 (in Polish)
- [8] J. Pacyna, Design the chemical composition of steels, AGH University of Science and Technology, Krakow (1997) (in Polish).
- [9] J. Pacyna, The new steels of high hardenability, high strength and high fracture toughness, Inżynieria Materiałowa, vol. 24, No. 6 (2003) 353-356 (in Polish).
- [10] T. Malkiewicz, The iron alloys phisical metallurgy, PWN, Warsaw-Krakow (1976) (in Polish).
- [11] A. Jędrzejewska-Strach, Manganium influence upon the kinetics of phase transformations, structure and qualities of model constructional steel alloys, Ph. D. Thesis, AGH University of Science and Technology, Krakow (1995) (in Polish).
- [12] M. Dubiel, Phase transformation in model alloys with chromium imitating the matrix of quenched construction and rustless steels, Ph. D. Thesis, AGH University of Science and Technology, Krakow (1996) (in Polish).
- [13] M. Strach, The structure and qualities of silicon steels evaluated on the basis research of model alloys of various silicon and carbon concentration, Ph. D. Thesis, AGH University of Science and Technology, Krakow (1995) (in Polish).
- [14] J. Krawczyk, J. Pacyna, M. Stramecki, T. Śleboda, The cooling rate distribution in a cross-section of air-cooled UIC60 railway rail, XXIX School of materials engineering, Krakow-Wisła (2001) 447-452 (in Polish).
- [15] J. Krawczyk, J. Pacyna, T. Śleboda, The cooling simulation of air-cooled UIC60 railway rail, XXIII Science and Technology Conference of Katowice Iron Works, SITPH, Rogoźnik (2003) 49-58 (in Polish).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ4-0018-0024