The effects of heat treatment on the mechanical properties of multicomponent white cast irons
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Multicomponent white cast irons contain many kinds of strong carbide-forming elements in order to obtain a very hard microstructure characterized by the presence of different carbides that are well dispersed in a martensitic matrix. The heat treatment of these products consists of high temperature austenization followed by quenching and two temperings, as required in order to increase their overall hardness and to completely eliminate residual austenite. The influence of tempering temperatures on the mechanical properties of these products, determined using tensile, hot compression and fracture toughness tests, was studied in this research work. Their corresponding failure micromechanisms were defined by means of the analysis of fracture surfaces.
KeywordsCarbide Austenite Martensite Fracture Toughness Cast Iron
The authors would like to thank the FICYT foundation of the Principado of Asturias for the financing of the research project (project number: PC-CIS-1-14) and also Fundicion Nodular S.A., the company that elaborated the material used in this study.
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