mineAlloy researchers from University of Queensland and Weir Minerals have recently published a review paper on the refinement of primary carbides in hypereutectic high-chromium cast irons. High-chromium cast irons (HCCIs) are widely used in mining, minerals and cementation industries. The large volume fraction of coarse primary carbides (M7C3) imparts excellent wear resistance, but it also results in high cracking susceptibility and early failure of components, particularly under impact loading. The mechanical performance of HCCIs is correlated with the microstructure of the matrix, as well as the size, shape, volume fraction and distribution of primary carbides. This paper comprehensively reviews the currently available methods to modify the primary M7C3 carbides in various HCCIs and, ultimately, to optimise their mechanical properties for wear resistant applications.
Follow this link to the full paper: https://doi.org/10.1007/s10853-020-05260-8