<p>High carbon ferrochrome hardfacing alloys are widely used to protect machinery equipment exposed to a combination of abrasion and impact. Strengthening high-chromium iron-based alloys with alloying elements is an important strategy for developing its wear resistance and impact property. In this study, novel complex Fe-<i>x</i>Cr-C-Nb-Mo-V-W hardfacing alloys with varying Cr contents of 14, 18 and 23 wt. % were prepared using open arc welding. The effects of the Cr content and the heat treatment on the microstructure, abrasive resistance and impact property of the hardfacing alloys were evaluated. With the rise in Cr content, the area fraction of M₇C₃ hard phase improves from 56 to 62%, while the grain size of M₇C₃ is refined from 26.5 μm to 22.0 μm. Results show that increasing Cr content increases the abrasive resistance but declines the impact property of the hardfacing alloys. Heat treatment at 900 °C decreases the area fraction of M₇C₃ phase and induces the grains coarse, resulting in the descent of the abrasive resistance and ascent of the impact property of the hardfacing alloys. Abrasive test results highlight that the importance of area fraction and grain size of M₇C₃ phase for abrasive resistance. However, the martensite/ austenite matrix with toughness plays the predominant role in the impact resistance by absorbing and dispersing the impact energy.</p>