Wear and oxidation behaviour of multicomponent white cast irons

Abstract

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 in high temperature austenisation followed by quenching and two temperings, required to increase their overall hardness and to completely eliminate residual austenite. The influence of tempering temperatures on hot compression, wear, and oxidation tests was studied in this research work. Hot compression, wear, and oxidation micromechanisms are discussed in relation to the chemical composition and microstructure of the iron under study.

Keywords:

• WHITE CAST IRON
• CARBIDES
• HEAT TREATMENT
• MICROSTRUCTURE
• CHEMICAL COMPOSITION