Abstract:Hadfield steels were prepared by adjusting the components of the alloys by adding Cr-V-Ti-RE,Cr-V-Ti,Cr-RE , and V-Ti-Nb-RE, respectively. The investigation was carried out to study the effect of multi-elements alloying on the microstructure and mechanical properties of Hadfield steel through metallographic microscope, scanning electron microscopy, mechanical properties tests and abrasive wear tests. The results have indicated that grains are refined observably, the form and distribution of impurities are improved, and the hardness, impact toughness and wear resistance increase due to multi-elements alloying. Meanwhile, the specimen with Cr-V-Ti-RE elements has optimal comprehensive performances, its hardness and impact toughness, compared with the one without Cr-V-Ti-RE elements, increase by 12.4% and 32.5% respectively, and the wear resistance increases by 13.9%~45.4%. The wear mechanism of Hadfield steel is pit deformation and microscopic cutting under middle and low impact energy, and spalling fatigue under high impact energy.