Developing materials with exceptional abrasion resistance

NiHard-4 and high-Cr-Mo white cast irons are extensively used in mining and mineral processing applications. The microstructure and mechanical properties of these abrasion resistant materials are highly sensitive to the chemical composition and heat treatment conditions. A mineAlloy team led by researchers at University of Queensland (Maziar Jokari, Yahia Ali and Jeff Gates) has recently published a study on the abrasion performance of NiHard-4 and High-Cr-Mo, using their inner circumference abrasion testing (ICAT) equipment. The article emphasises the influence of Cr:C and Cr:Fe ratios on the hardness and fracture toughness of the eutectic carbides. The full text is available at