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Progress in Plasma Processing of Materials, 2003

ISBN:
978-1-56700-192-1 (Print)
978-1-56700-447-2 (Online)

ASSESSMENT OF THE STRUCTURE AND THE PROPERTIES OF THE MN-CR-NI LAYER COATING THE HADFIELD STEEL

G. A. Filippov
I.P.Bardin Central Research Institute of Iron and Steel Industry, 2nd Baumanskaya 9/23, 107005 Moscow, Russia

M. V. Illichev
Science and Engineering Center for Energy Efficient Processes and Equipment, Associated Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13/19, 125412, Moscow, Russia

E. Kh. Isakaev
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint, Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

Oleg A. Sinkevich
Science Technological Center of Associated Institute for High Temperature, Russian Academy of Science and Moscow Power Engineering Institute (Technical University), Russia

G. A. Zhelobtsova
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

Abstract

Railway frogs are manufactured using expensive manganese steel (Hadfield steel). Their resource is determined by intensive local wear. The paper deals with the investigation of the composition, the structure, mechanical properties and the destructibility of the Mn-Cr-Ni layer over Hadfield steel made using the plasma spray technique. The coating was performed in several layers with intermediate abrasive cleaning and mechanical hardening of each layer. The hardness and the strength of coating layer are found to be 2 times greater compared with the bulk metal and the plasticity is less according to expectation. Strength of traction between the layer and substrate is a little less than strength of bulk metal due to boundary defects.