Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia)
L. Yu. Dobosh, Cand. Eng., Associate Prof., dobosh87@mail.ru
A. I. Chursin, Student, churs04@mail.ru
Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia)
N. A. Feoktistov, Cand. Eng., Associate Prof., Head of the Dept. of Casting Processes and Materials Science, fna87@mail.ru
V. M. Golod, Cand. Eng., Consultant
Hadfield steel (110G13L) is a high-manganese steel distinguished by its high resistance to wear (abrasion) under high pressure or impact loads. The mechanical and operational properties of components made from Hadfield steel are determined by the parameters of the microstructure, which forms during primary crystallization as dendrites of a solid solution. The dendritic structure is the most serious obstacle to effective forecasting and, consequently, control of casting processes. This is due to the morphological complexity of the dispersed system of dendritic trunks and branches, which are continuously changing as a result of the coalescence of the crystallizing alloy. Despite numerous studies of the dendritic structure, the search for an adequate implementation of both experimental and computer analysis of its evolution continues. Models of structural-phase transformations often include the size of the secondary dendrite arm spacing λ2 as a key parameter, assuming that it remains constant during solidification. This paper presents a comparative study and assessment of the influence of cooling rate on the dendritic microstructure parameters of Hadfield steel and demonstrates a methodology for analyzing the results of metallographic studies.
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